[go: up one dir, main page]

WO2025105323A1 - Système d'irrigation, procédé d'irrigation, programme et support lisible par ordinateur - Google Patents

Système d'irrigation, procédé d'irrigation, programme et support lisible par ordinateur Download PDF

Info

Publication number
WO2025105323A1
WO2025105323A1 PCT/JP2024/039920 JP2024039920W WO2025105323A1 WO 2025105323 A1 WO2025105323 A1 WO 2025105323A1 JP 2024039920 W JP2024039920 W JP 2024039920W WO 2025105323 A1 WO2025105323 A1 WO 2025105323A1
Authority
WO
WIPO (PCT)
Prior art keywords
irrigation
flow rate
flow velocity
plant
irrigation device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/039920
Other languages
English (en)
Japanese (ja)
Inventor
修一 舟橋
宏明 井手
貴大 田口
高明 山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of WO2025105323A1 publication Critical patent/WO2025105323A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G27/00—Self-acting watering devices, e.g. for flower-pots
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general

Definitions

  • the present disclosure relates to an irrigation system, an irrigation method, a program, and a computer-readable medium.
  • An irrigation system and method for irrigating plants are known.
  • Patent Document 1 discloses a growth environment control system that drives an environmental control device, including irrigation, based on the measurement results of multiple sensors, such as a sap flow sensor.
  • Patent Document 2 discloses a method for predicting the timing of irrigation based on changes in measurements from a sap flow sensor.
  • Patent Document 1 leaves room for improvement in that it uses a simple configuration to irrigate plants in a way that is more suited to their condition.
  • Patent Document 2 irrigates plants based on a single pattern of changes in sap flow rate, but leaves room for improvement in terms of accuracy, i.e., leaves room for improvement in irrigating plants in a way that is more suited to their condition.
  • the present disclosure provides an irrigation system, an irrigation method, a program, and a computer-readable medium that can perform irrigation appropriate to the condition of a plant using a simple configuration.
  • An irrigation system includes an irrigation device that supplies water to a plant, a control device that controls the operation of the irrigation device, and a first flow rate sensor and a second flow rate sensor that are installed at different positions to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device, and the control device controls the operation of the irrigation device based on the correlation between the measurement value of the first flow rate sensor and the measurement value of the second flow rate sensor.
  • the irrigation method is a method for controlling the operation of an irrigation device that supplies water to a plant, and controls the operation of the irrigation device based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions so as to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • a program according to one aspect of the present disclosure is a program for controlling the operation of an irrigation device that supplies water to a plant, and when executed by a processor, causes the processor to control the operation of the irrigation device based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions so as to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • a computer-readable medium is a computer-readable medium for controlling the operation of an irrigation device that supplies water to a plant, and when executed by a processor, causes the processor to control the operation of the irrigation device based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • a simple configuration can be used to provide irrigation appropriate to the plant's condition.
  • FIG. 13 is a diagram showing an algorithm relating to a method for controlling an irrigation device in the irrigation system of the first embodiment.
  • 3 is a graph showing an experimental result in which the irrigation system of the first embodiment is operated based on the algorithm shown in FIG. 2 to irrigate a plant twice.
  • FIG. 1 is a schematic diagram showing an irrigation system according to a modified example of the first embodiment.
  • FIG. 1 is a schematic diagram showing an irrigation system according to a second embodiment.
  • FIG. 13 is a diagram showing an algorithm for controlling an irrigation device in the irrigation system of the second embodiment. Graph showing flow rate measurements when three flow rate sensors are installed in an irrigation system and irrigation is repeated multiple times using both the algorithm shown in FIG. 1 and the algorithm shown in FIG. 6.
  • FIG. 13 is a schematic diagram showing an irrigation system according to a third embodiment.
  • FIG. 13 is a diagram showing an algorithm for controlling an irrigation device in the irrigation system of the third embodiment.
  • FIG. 1 is a schematic diagram showing an irrigation system 2 according to embodiment 1.
  • the irrigation system 2 shown in FIG. 1 is a system for irrigating a plant 4, and includes an irrigation device 6, a control device 8, and multiple flow rate sensors 10, 12.
  • the irrigation device 6 is a device that supplies water to the plants 4 to irrigate them.
  • the irrigation device 6 has a liquid delivery section 7 that delivers water, and the liquid delivery section 7 is positioned so that it can deliver water to the soil 9 in which the plants 4 are planted.
  • the irrigation device 6 is connected to a control device 8.
  • the control device 8 is a device for controlling the irrigation system 2 including the irrigation device 6.
  • the control device 8 is configured, for example, by a microcomputer having a processor and a memory that stores a computer program executed by the processor.
  • the control device 8 has the function of controlling the operation of the irrigation device 6, and can control, for example, the amount of liquid delivered per unit time, the duration and timing of delivery of liquid, etc.
  • the control device 8 is further connected to a number of flow rate sensors 10, 12.
  • the control device 8 receives measurement values transmitted from each of the flow rate sensors 10, 12, and controls the operation of the irrigation device 6 based on the measurement values.
  • the flow velocity sensors 10 and 12 are sensors for measuring the flow velocity of a fluid flowing through an object to be measured.
  • the flow velocity sensors 10 and 12 may be any type of flow velocity sensor capable of measuring the flow velocity of a fluid flowing through an object to be measured, and in the first embodiment, a contact-type heat pulse flow velocity sensor is used.
  • the sensor installation surface is then brought into contact with the surface of the object to be measured, and a constant output pulse current is input to the heater to generate heat.
  • the heat generated by the heater is transferred to the two resistance thermometers via the base material.
  • the first resistance thermometer which is closer to the heater, increases in temperature faster than the second resistance thermometer, and the temperature increases.
  • the rate of temperature increase of the second resistance thermometer increases relatively. After that, the temperatures of the two resistance thermometers become equal.
  • c is a constant obtained by calibration. In addition to calibration, it is also possible to obtain c by simulating the temperature distribution.
  • the flow rate sensors 10 and 12 are installed in different locations.
  • the flow rate sensor 10 is installed in the liquid delivery section 7 of the irrigation device 6, and the flow rate sensor 12 is installed in the stem 16 of the plant 4.
  • the flow rate sensor 10 measures the flow rate of water flowing through the liquid delivery section 7 of the irrigation device 6, and the flow rate sensor 12 measures the flow rate of sap flowing through the stem 16 of the plant 4.
  • the plant 4 shown in FIG. 1 has multiple stems 16, multiple leaves 18, and fruit 20.
  • the plant 4 is a strawberry plant, and the fruit 20 is a strawberry.
  • FIG. 1 only one fruit 20 is illustrated.
  • the stem 16 leading to the leaves 18 and the stem 16 leading to the fruit 20 are separated from the base.
  • the flow velocity sensor 12 shown in FIG. 1 is installed on the stem 16A, which is connected to the leaves 18A, among the multiple stems 16. No fruit 20 is connected to the stem 16A, only the leaves 18A are connected. By installing the flow velocity sensor 12 on the stem 16A, it is possible to measure the flow velocity of the sap flow (water used for photosynthesis in the leaves 18A) that flows from the base of the plant 4 toward the leaves 18A.
  • sap flow water used for photosynthesis in the leaves 18A
  • the irrigation system 2 having the above configuration controls the operation of the irrigation device 6 based on the correlation between the measurement value of the flow rate sensor 10 (flow rate of water passing through the liquid delivery section 7) and the measurement value of the flow rate sensor 12 (flow rate of the sap flowing toward the leaves 18A). This allows irrigation that is best suited to the state of the plant 4 to be performed using a simple configuration.
  • the algorithm for executing this control will be explained using Figure 2.
  • FIG. 2 shows an algorithm for controlling the operation of the irrigation device 6 in the irrigation system 2 of embodiment 1.
  • Figure 2 includes multiple graphs. Each graph shows time [min] on the horizontal axis and flow rate per unit time [ml/min] on the vertical axis.
  • the control device 8 first starts irrigation by the irrigation device 6.
  • the initial amount of irrigation by the irrigation device 6 may be a predetermined amount. In the example shown in FIG. 2, the initial amount of irrigation is set to irrigation by the irrigation device 6 for 5 seconds.
  • the measurement value of flow velocity sensor 10 changes after irrigation begins, and then after a further time the measurement value of flow velocity sensor 12 changes.
  • the integrated value of the measurement values of flow velocity sensor 10 is S1a
  • the integrated value of the measurement values of flow velocity sensor 12 is S1b.
  • the control device 8 calculates the ratio of S1b to S1a (S1b/S1a) and compares it with a predetermined threshold value CL. Based on the comparison result, the control device 8 determines the next amount of irrigation to be performed by the irrigation device 6.
  • the control device 8 increases the next amount of irrigation by the irrigation device 6 compared to the previous amount of irrigation.
  • the next amount of irrigation is increased by continuing irrigation by the irrigation device 6 for 10 seconds, which is longer than the previous 5 seconds.
  • the measurement value of flow velocity sensor 10 changes after some time has elapsed since the second irrigation, and then the measurement value of flow velocity sensor 12 changes after a further period of time.
  • the integrated value of the measurement values of flow velocity sensor 10 is S2a
  • the integrated value of the measurement values of flow velocity sensor 12 is S2b.
  • the control device 8 calculates the ratio of S2b to S2a (S2b/S2a), compares it with a predetermined threshold CL, and determines the next amount of irrigation to be performed by the irrigation device 6 based on the comparison result.
  • the threshold CL used here may be the same value as the threshold CL used in the first judgment, or it may be a different value. In the example shown in Figure 2, the same value is used for the threshold CL.
  • the control device 8 increases the next amount of irrigation by the irrigation device 6 compared to the previous amount of irrigation. Specifically, as shown in graph 5, the next amount of irrigation is increased by continuing irrigation by the irrigation device 6 for 15 seconds, which is longer than the previous 10 seconds.
  • the control device 8 reduces the amount of water to be irrigated by the irrigation device 6 next time compared to the amount of water to be irrigated the previous time. Specifically, as shown in graph 6, the amount of water to be irrigated by the irrigation device 6 next time is reduced by continuing the irrigation for 5 seconds, which is shorter than the previous 10 seconds.
  • next irrigation amount by the irrigation device 6 is determined based on the correlation between the measurements S1a, S2a, and S3a of the flow velocity sensor 10 and the measurements S1b, S2b, and S3b of the flow velocity sensor 12 (S1b/S1a, S2b/S2a, S3b/S3a).
  • the measured values S1a, S2a, and S3a of the flow rate sensor 10 indicate the flow rate of water flowing through the liquid delivery section 7 of the irrigation device 6, and the measured values S1b, S2b, and S3b of the flow rate sensor 12 indicate the flow rate of sap flowing in the stem 16A connected to the leaves 18A of the plant 4.
  • S1b/S1a, S2b/S2a, and S3b/S3a are equal to or greater than a predetermined threshold value CL, it can be diagnosed that the flow rate of sap flowing toward the leaves 18A is relatively high and that photosynthesis is actively taking place in the leaves 18A of the plant 4.
  • the flow rate of sap flowing toward the leaves 18A can be increased, promoting photosynthesis in the leaves 18A and facilitating the growth of the plant 4.
  • the previous amount of irrigation water may be maintained.
  • S1b/S1a, S2b/S2a, and S3b/S3a are less than a predetermined threshold value CL, the amount of sap flowing toward the leaf 18A is low, and it can be diagnosed that photosynthesis is not actively taking place in the leaf 18A of the plant 4. In such a case, the amount of water supplied to the plant 4 can be reduced/stopped by reducing/stopping irrigation by the irrigation device 6, thereby preventing excess water from being supplied to the plant 4.
  • the operation of the irrigation device 6 can be controlled so that the amount of liquid delivered by the irrigation device 6 is relatively smaller than when S1b/S1a, S2b/S2a, and S3b/S3a are equal to or greater than the predetermined threshold value CL.
  • irrigation that is more suitable for the condition of the plant 4 can be performed using a simple configuration consisting of an irrigation device 6 and two flow rate sensors 10, 12.
  • Figure 3 shows the experimental results when the irrigation system 2 shown in Figure 1 was operated based on the algorithm shown in Figure 2 and the plant 4 was watered twice.
  • the irrigation device 6 performs the first irrigation with a predetermined amount. After that, within about 5 minutes, the measurement value of the flow velocity sensor 10 shows a change (corresponding to S1a). After that, with a delay, the measurement value of the flow velocity sensor 12 shows a change (corresponding to S1b).
  • the measurement value S2b of the flow velocity sensor 12 taken after the second watering was significantly increased compared to the measurement value S1b of the flow velocity sensor 12 taken after the first watering. This shows that by increasing the amount of watering the second time when it is presumed that photosynthesis is actively taking place in the leaf 18A, it is possible to significantly increase the flow rate of the sap flowing toward the leaf 18A.
  • the irrigation system 2 in particular uses contact-type heat pulse flow rate sensors 10, 12, which are inexpensive, small, and can be produced with low heat capacity, making it easy to install multiple sensors, and to easily construct an irrigation system 2 such as the one shown in Figure 1.
  • Such an irrigation system 2 can be used in agriculture, such as open-field cultivation, vinyl greenhouses, and plant factories, as well as for irrigation management in the cultivation of ornamental plants such as flowers and foliage plants, and the cultivation of plants for biofuel.
  • the flow rate of the sap flowing through the stem 16A connected to the leaf 18A of the sweet potato was also observed by the flow rate sensor 12.
  • the flow rate sensor 12 In the case of a plant 4 with deep roots such as sweet potato, it is often impossible to grasp the state of growth underground from above ground.
  • the ratio of the flow rate of the sap flow to the flow rate of the sap flow per unit time differed by two times for the two seedlings mentioned above.
  • the irrigation device 2 is expected to have the effect of grasping the state of growth of the plant 4 during the process, and is particularly expected to be used for irrigation management in the cultivation of seedlings.
  • the ratio of the measurement value of flow velocity sensor 12 (second flow velocity sensor) to the measurement value of flow velocity sensor 10 (first flow velocity sensor) becomes equal to or exceeds a predetermined ratio, the volume of the roots of plant 4 can be calculated relatively, and whether or not plant 4 should be harvested can be determined based on the calculated volume. This makes it possible to ensure a stable harvest of plant 4, such as sweet potato.
  • a soil sensor was provided in the soil 9, and another flow rate sensor was provided in the stem 16B connected to the fruit 20.
  • the soil sensor is capable of measuring the amount of moisture.
  • irrigation was performed using the irrigation device 6, and the measurement value of the soil sensor, the measurement value of the flow rate sensor 12 (the amount of sap flowing into the leaves 18A, which is thought to roughly correspond to the amount of transpiration), and the measurement value of the other flow rate sensor (the amount of sap flowing into the fruit 20, which is thought to roughly correspond to the amount of translocation).
  • the irrigation system 2 of embodiment 1 comprises an irrigation device 6 that supplies water to the plant 4, a control device 8 that controls the operation of the irrigation device 6, and a flow velocity sensor 10 (first flow velocity sensor) and a flow velocity sensor 12 (second flow velocity sensor) that are installed at different positions so as to measure the flow velocity of the sap flowing through the plant 4 or the flow velocity of water flowing through the irrigation device 6, and the control device 8 controls the operation of the irrigation device 6 based on the correlation between the measurement values of the flow velocity sensor 10 and the measurement values of the flow velocity sensor 12.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the measurements of the two flow rate sensors 10, 12, making it possible to perform irrigation control that promotes the growth of the plant 4 with a simple configuration.
  • the flow rate sensor 10 (first flow rate sensor) is installed in the liquid delivery section 7 of the irrigation device 6, and the flow rate sensor 12 (second flow rate sensor) is installed in the stem 16A connected to the leaf 18A of the plant 4, and measures the flow rate of the sap flowing toward the leaf 18A.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the flow rate of the water flowing through the irrigation device 6 and the flow rate of the sap flowing through the plant 4, thereby enabling irrigation control to be performed that promotes the growth of the plant 4, for example by determining the amount and timing of water delivery from the irrigation device 6 so as to increase the amount of sap flowing toward the leaves 18A of the plant 4.
  • the control device 8 determines the amount of liquid delivered by the irrigation device 6 depending on whether the ratio (S1b/S1a, S2b/S2a, S3b/S3a) of the measurement value of the flow rate sensor 12 (second flow rate sensor) to the measurement value of the flow rate sensor 10 (first flow rate sensor) is equal to or greater than a predetermined threshold value CL (predetermined ratio).
  • CL predetermined threshold value
  • the control device 8 controls the amount of liquid delivered by the irrigation device 6 to be relatively smaller than when the ratio of the measured values is equal to or greater than the predetermined threshold value CL.
  • the control device 8 controls the operation of the irrigation device 6 based on the correlation between the integrated value of the measurement value of the flow velocity sensor 10 (first flow velocity sensor) and the integrated value of the measurement value of the flow velocity sensor 12 (second flow velocity sensor).
  • first flow velocity sensor the integrated value of the measurement value of the flow velocity sensor 10
  • second flow velocity sensor the integrated value of the measurement value of the flow velocity sensor 12
  • the irrigation method according to the first embodiment is a method for controlling the operation of an irrigation device 6 that supplies water to a plant 4, and controls the operation of the irrigation device 6 based on the correlation between the measured values of a flow rate sensor 10 (first flow rate sensor) and a flow rate sensor 12 (second flow rate sensor), which are installed at different positions to measure the flow rate of the sap flowing through the plant 4 or the flow rate of the water flowing through the irrigation device 6.
  • a flow rate sensor 10 first flow rate sensor
  • second flow rate sensor second flow rate sensor
  • This method allows irrigation control that promotes the growth of the plant 4 to be performed with a simple configuration.
  • control device 8 controls (outputs) the operation of the irrigation device 6 based on the measured values (inputs) of the flow rate sensors 10 and 12, but the present invention is not limited to this case.
  • FIG. 4 is a diagram showing an irrigation system 100 according to a modified example of embodiment 1.
  • the irrigation system 100 shown in FIG. 4 differs from the irrigation system 2 of embodiment 1 in that it has a server 102 instead of the control device 8 and various processes are performed on the server 102.
  • the irrigation system 100 newly includes a server 102, a measurement circuit 104, and wireless units 106 and 108.
  • the server 102 is a component that performs processing related to the control of the irrigation system 100, and any type of server, such as a cloud server, may be used.
  • the server 102 communicates with the wireless units 106 and 108 of the irrigation system 100.
  • the measurement circuit 104 is a circuit for outputting the measured values of the flow velocity sensors 10 and 12.
  • the measurement circuit 104 is connected to each of the two flow velocity sensors 10 and 12.
  • the measurement circuit 104 may be any type of circuit as long as it is capable of outputting the measured values of the flow velocity sensors 10 and 12.
  • the wireless units 106 and 108 are components for communicating with the server 102.
  • the wireless unit 106 is provided in the irrigation device 6, and the wireless unit 108 is provided in the measurement circuit 104.
  • the wireless unit 106 provided in the irrigation device 6 receives a control signal for controlling the irrigation device 6 from the server 102.
  • the wireless unit 108 provided in the measurement circuit 104 transmits the measurement values of the flow rate sensors 10 and 12 output from the measurement circuit 104 to the server 102.
  • the wireless units 106 and 108 may be made of any type of material as long as they are capable of communicating with the server 102.
  • the server 102 receives the measurement values (input) of each of the flow rate sensors 10, 12 transmitted from the wireless unit 108, determines the amount of irrigation to be performed by the irrigation device 6 based on the measurement values, and transmits a control signal (output) to the wireless unit 106 for causing the irrigation device 6 to irrigate at the determined amount of irrigation.
  • This makes it possible to control the irrigation device 6 using an algorithm similar to that of the irrigation system 2 of embodiment 1, and to perform irrigation that is more suitable for the state of the plants 4 using a simple configuration.
  • the server 102 has a program for executing the algorithm shown in FIG. 2. When the program is executed by the processor, it causes the irrigation device 6 to operate in a desired manner.
  • the irrigation system 100 shown in FIG. 4 has a computer-readable medium that stores the program.
  • the irrigation system 100 of the modified example has a program for controlling the operation of the irrigation device 6 that supplies water to the plant 4, and when the program is executed by a processor, it causes the processor to control the operation of the irrigation device 6 based on the correlation between the respective measurement values of a flow velocity sensor 10 (first flow velocity sensor) and a flow velocity sensor 12 (second flow velocity sensor), which are installed at different positions so as to measure the flow velocity of the sap flowing through the plant 4 or the flow velocity of water flowing through the irrigation device 6.
  • a flow velocity sensor 10 first flow velocity sensor
  • second flow velocity sensor second flow velocity sensor
  • This configuration makes it possible to perform irrigation control that promotes the growth of the plant 4 with a simple configuration.
  • the irrigation system 100 has a computer-readable medium storing a program for controlling the operation of the irrigation device 6 that supplies water to the plant 4, and when the program is executed by a processor, the processor controls the operation of the irrigation device 6 based on the correlation between the measured values of the flow rate sensor 10 (first flow rate sensor) and the flow rate sensor 12 (second flow rate sensor), which are installed at different positions to measure the flow rate of the sap flowing through the plant 4 or the flow rate of the water flowing through the irrigation device 6.
  • first flow rate sensor first flow rate sensor
  • second flow rate sensor second flow rate sensor
  • This configuration makes it possible to perform irrigation control that promotes the growth of the plant 4 with a simple configuration.
  • FIG. 5 is a schematic diagram showing an irrigation system 200 according to embodiment 2.
  • the irrigation system 200 shown in FIG. 5 differs from the irrigation system 2 of embodiment 1 in that it targets a plant 204 that is different from the plant 4 shown in FIG. 1.
  • Plant 204 has a number of stems 216, a number of leaves 218, and fruit 220.
  • plant 204 is an apple tree
  • fruit 220 is an apple.
  • the stem 216A leading to the leaves 218 and the stem 216B leading to the fruit 220 branch off from the same stem 216C. Therefore, when measuring the flow rate of the sap flowing toward the leaves 218 and the flow rate of the sap flowing toward the fruit 220, flow rate sensors can be attached to the stems 216A and 216B, rather than to the stem 216C.
  • the irrigation system 200 shown in FIG. 5 includes an irrigation device 6, a control device 8, a flow rate sensor 10, and two flow rate sensors 212 and 214.
  • Flow velocity sensor 212 is installed on stem 216A connected to leaf 218, and flow velocity sensor 214 is installed on stem 216B connected to fruit 220.
  • the irrigation system 200 having the above configuration controls the operation of the irrigation device 6 based on the correlation between the measurement value of the flow velocity sensor 212 (the flow velocity of the sap flowing toward the leaves 218) and the measurement value of the flow velocity sensor 214 (the flow velocity of the sap flowing toward the fruit 220).
  • the algorithm for executing this control is explained using FIG. 6.
  • FIG. 6 is a diagram showing an algorithm for controlling the operation of the irrigation device 6 in the irrigation system 200 of embodiment 2.
  • Figure 6 includes multiple graphs, each of which shows time [min] on the horizontal axis and flow rate per unit time [ml/min] on the vertical axis.
  • the algorithm shown in FIG. 6, controls the amount of irrigation by the irrigation device 6 based on the correlation (S1c/S1b, S2c/S2b, S3c/S3b) between the measurement values (accumulated values) S1b, S2b, S3b of the flow velocity sensor 212 and the measurement values (accumulated values) S1c, S2c, S3c of the flow velocity sensor 214.
  • S1c/S1b, S2c/S2b, and S3c/S3b are equal to or greater than a predetermined threshold value CL, the amount of irrigation by the irrigation device 6 is increased and maintained, and if they are less than the threshold value CL, the amount of irrigation by the irrigation device 6 is reduced and stopped.
  • irrigation that is more suited to the condition of the plant 204 can be performed using a simple configuration consisting of an irrigation device 6 and two flow rate sensors 212, 214.
  • the configuration and algorithm of embodiment 1 may be combined with the configuration and algorithm of embodiment 2. That is, three flow rate sensors 10, 212, 214 may be installed, and the next irrigation amount may be determined based on first information as to whether S1b/S1a, S2b/S2a, and S3b/S3a are equal to or greater than a predetermined threshold value CL as in embodiment 1, and second information as to whether S1c/S1b, S2c/S2b, and S3c/S3b are equal to or greater than a predetermined threshold value CL as in embodiment 2.
  • This can be applied not only to plants 204 such as apples, but also to plants 4 such as strawberries. The results of this example are shown in FIG. 7.
  • Figure 7 is a graph showing the flow rate measurement results when three flow rate sensors 10, 212, and 214 were installed and irrigation was repeated multiple times using the irrigation device 6 using both the algorithm shown in Figure 1 and the algorithm shown in Figure 6.
  • the measurement results of the flow rate sensor 10 installed in the liquid delivery section 7 are shown as “liquid delivery flow”
  • the measurement results of the flow rate sensor 212 installed in the stem 216A connected to the leaf 218 are shown as “sap flow”
  • the measurement results of the flow rate sensor 214 installed in the stem 216B connected to the fruit 220 are shown as "transfer flow”.
  • thresholds were set for the ratio of the sap flow rate to the delivery flow rate, and the ratio of the diversion flow rate to the sap flow rate, and the amount of water irrigated by the irrigation device 6 was increased/decreased depending on whether each ratio was equal to or greater than the threshold. This allowed the apple fruit 220 to be watered at the appropriate time by appropriate watering, and it was possible to confirm the transpiration that is thought to be photosynthesis (corresponding to the "sap flow") and the subsequent diversion that is thought to be the result.
  • the timing and extent of the phenomenon considered to be transpiration can be ascertained.
  • the timing and extent of the phenomenon considered to be translocation can be ascertained.
  • the timing and amount of irrigation can be determined, thereby maximizing translocation, that is, achieving highly efficient growth of the buds and fruits 220.
  • the flow rate of sap flowing to the fruit 220 may not be measured only by placing a flow rate sensor on the stem leading to the flower, and the flow rate of sap flowing to the flower may be measured.
  • the flow rate sensor may be placed on the fruit 220 or the stem leading to the flower, and the flow rate of sap flowing to the fruit 220 or the flower may be measured.
  • the irrigation system 200 of embodiment 2 includes an irrigation device 6 that supplies water to the plant 204, a control device 8 that controls the operation of the irrigation device 6, and a flow velocity sensor 212 (first flow velocity sensor) and a flow velocity sensor 214 (second flow velocity sensor) that are installed at different positions so as to measure the flow velocity of the sap flowing through the plant 204, and the control device 8 controls the operation of the irrigation device 6 based on the correlation between the measurement values of the flow velocity sensor 212 and the measurement values of the flow velocity sensor 214.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the measurements of the two flow rate sensors 212, 214, making it possible to perform irrigation control that promotes the growth of the plant 204 with a simple configuration.
  • the flow rate sensor 212 (first flow rate sensor) is installed on the stem 216A connected to the leaf 218 of the plant 204, and measures the flow rate of the sap flowing toward the leaf 218, and the flow rate sensor 214 (second flow rate sensor) is installed on the stem 216B connected to the fruit 220 of the plant 204, and measures the flow rate of the sap flowing toward the fruit 220.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the flow rate of the sap flowing toward the leaves 218 and the flow rate of the sap flow (translocation) toward the fruit 220, thereby enabling irrigation control to be performed that promotes the growth of the plant 204, such as determining the amount and timing of water delivery from the irrigation device 6 so as to increase the amount of sap flowing toward the fruit 220.
  • the control device 8 determines the amount of liquid delivered by the irrigation device 6 depending on whether the ratio (S1c/S1b, S2c/S2b, S3c/S3b) of the measurement value of the flow rate sensor 214 (second flow rate sensor) to the measurement value of the flow rate sensor 212 (first flow rate sensor) is equal to or greater than a predetermined threshold value CL (predetermined ratio).
  • CL predetermined threshold value
  • the control device 8 controls the amount of liquid delivered by the irrigation device 6 to be relatively smaller than when the ratio of the measured values is equal to or greater than the predetermined threshold value CL.
  • a predetermined threshold value CL predetermined ratio
  • irrigation control according to the state of the plant 204 can be performed, such as reducing or stopping the amount of liquid delivered by the irrigation device 6.
  • the control device 8 controls the operation of the irrigation device 6 based on the correlation between the integrated value of the measurement value of the flow velocity sensor 212 (first flow velocity sensor) and the integrated value of the measurement value of the flow velocity sensor 214 (second flow velocity sensor).
  • first flow velocity sensor the integrated value of the measurement value of the flow velocity sensor 212
  • second flow velocity sensor the integrated value of the measurement value of the flow velocity sensor 214
  • the irrigation method according to the second embodiment is a method for controlling the operation of the irrigation device 6 that supplies water to the plant 204, and controls the operation of the irrigation device 6 based on the correlation between the measured values of a flow velocity sensor 212 (first flow velocity sensor) and a flow velocity sensor 214 (second flow velocity sensor) that are installed at different positions to measure the flow velocity of the sap flowing through the plant 204.
  • This method allows irrigation control that promotes the growth of the plant 204 to be performed with a simple configuration.
  • FIG. 8 is a schematic diagram showing an irrigation system 300 according to embodiment 3.
  • the irrigation system 300 shown in FIG. 8 differs from the irrigation system 2 of the first and second embodiments in that the plant 4 shown in FIG. 1 and the plant 204 shown in FIG. 5 are different plants 304 that are targeted.
  • Plant 304 has a number of stems 316, a number of leaves 318, and a fruit 320.
  • plant 304 is a tomato plant
  • fruit 320 is a tomato.
  • stem 316A connected to leaf 318A, stem 316B connected to leaf 318B, and stem 316C connected to fruit 320 branch off from another stem 316D.
  • flow rate sensors can be attached to stems 316A, 316B, and 316C, rather than stem 316D.
  • the irrigation system 300 shown in FIG. 8 includes an irrigation device 6, a control device 8, a flow rate sensor 10, and three flow rate sensors 312, 313, and 314.
  • Flow velocity sensor 312 is installed on stem 316A connected to lower leaf 318A
  • flow velocity sensor 313 is installed on stem 316B connected to upper leaf 318B
  • flow velocity sensor 314 is installed on stem 316C connected to fruit 320.
  • flow velocity sensor 312 By installing flow velocity sensor 312 on stem 316A, it is possible to measure the flow velocity of the sap flowing toward leaf 318A. By installing flow velocity sensor 313 on stem 316B, it is possible to measure the flow velocity of the sap flowing toward leaf 318A. By installing flow velocity sensor 314 on stem 316C, it is possible to measure the flow velocity of the sap flowing toward fruit 320.
  • two flow rate sensors 312 and 313 are provided to measure the flow rate of the sap flowing toward the leaf 318, with the flow rate sensor 312 positioned below and the flow rate sensor 313 positioned below.
  • the irrigation system 300 controls the operation of the irrigation device 6 based on the correlation between the measurement value of the flow rate sensor 312 located below (flow rate of the sap flowing toward the leaf 318A) and the measurement value of the flow rate sensor 323 (flow rate of the sap flowing toward the leaf 318B). The algorithm for executing this control will be explained using Figure 9.
  • FIG. 9 shows an algorithm for controlling the operation of the irrigation device 6 in the irrigation system 300 of embodiment 3.
  • Figure 9 includes multiple graphs, each of which shows time [min] on the horizontal axis and flow rate per unit time [ml/min] on the vertical axis.
  • the algorithm shown in FIG. 9, like the algorithm shown in FIG. 6, controls the amount of irrigation by the irrigation device 6 based on the correlation (S1b'/S1b, S2b'/S2b, S3b) between the measurement values (accumulated values) S1b, S2b, S3b of the flow velocity sensor 312 and the measurement values (accumulated values) S1b', S2b', S3b' of the flow velocity sensor 313 (S1b'/S1b, S2b'/S2b, S3b'/S3b).
  • S1b'/S1b, S2b'/S2b, or S3b'/S3b is less than a predetermined threshold CL, irrigation by the irrigation device 6 is continued, and if it is equal to or greater than the threshold CL, irrigation by the irrigation device 6 is stopped.
  • irrigation that is more suited to the condition of the plant 304 can be performed using a simple configuration consisting of the irrigation device 6 and flow rate sensors 312, 314.
  • the irrigation system 300 of the third embodiment is provided with a flow rate sensor 10 that measures the flow rate of water flowing through the liquid delivery section 7 of the irrigation device 6, and a flow rate sensor 314 that measures the flow rate of sap flowing through the stem 316C connected to the fruit 320. Therefore, it is also possible to execute a further combination of the algorithm of the first embodiment and the algorithm of the second embodiment.
  • the irrigation system 300 of embodiment 3 includes an irrigation device 6 that supplies water to the plant 304, a control device 8 that controls the operation of the irrigation device 6, and a flow velocity sensor 312 (first flow velocity sensor) and a flow velocity sensor 313 (second flow velocity sensor) that are installed at different positions so as to measure the flow velocity of the sap flowing through the plant 304, and the control device 8 controls the operation of the irrigation device 6 based on the correlation between the measurement values of the flow velocity sensor 312 and the measurement values of the flow velocity sensor 313.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the measured values of the two flow rate sensors 312, 313, making it possible to perform irrigation control that promotes the growth of the plant 304 with a simple configuration.
  • the flow rate sensor 312 (first flow rate sensor) is installed on the stem 316A connected to the leaf 318A of the plant 304
  • the flow rate sensor 313 (second flow rate sensor) is installed at a position higher than the flow rate sensor 312 on the stem 316B connected to the leaf 318B of the plant 304.
  • the operation of the irrigation device 6 can be controlled based on the correlation between the flow rate of the sap flowing through the upper part and the flow rate of the sap flowing through the lower part, thereby enabling irrigation control to be performed that promotes the growth of the plant 304, such as by determining the amount and timing of water delivery from the irrigation device 6 so as to reduce the amount of sap flowing through the upper part in order to increase the sugar content of the plant 304, such as a tomato.
  • the control device 8 determines the amount of liquid delivered by the irrigation device 6 depending on whether the ratio (S1b'/S1b, S2b'/S2b, S3b'/S3b) of the measurement value of the flow rate sensor 313 (second flow rate sensor) to the measurement value of the flow rate sensor 312 (first flow rate sensor) is equal to or greater than a predetermined threshold value CL (predetermined ratio).
  • CL predetermined threshold value
  • the control device 8 controls the amount of liquid delivered by the irrigation device 6 to be relatively small compared to when the ratio of the measured values is not equal to or greater than the predetermined threshold value CL.
  • the control device 8 controls the operation of the irrigation device 6 based on the correlation between the integrated value of the measurement value of the flow velocity sensor 312 (first flow velocity sensor) and the integrated value of the measurement value of the flow velocity sensor 313 (second flow velocity sensor).
  • the irrigation method according to the third embodiment is a method for controlling the operation of the irrigation device 6 that supplies water to the plant 304, and controls the operation of the irrigation device 6 based on the correlation between the measured values of a flow velocity sensor 312 (first flow velocity sensor) and a flow velocity sensor 313 (second flow velocity sensor) that are installed at different positions to measure the flow velocity of the sap flowing through the plant 304.
  • irrigation control that promotes the growth of the plant 304 can be performed with a simple configuration.
  • An irrigation system comprising an irrigation device that supplies water to plants, a control device that controls the operation of the irrigation device, and a first flow velocity sensor and a second flow velocity sensor that are installed at different positions so as to measure the flow velocity of sap flowing through the plant or the flow velocity of water flowing through the irrigation device, wherein the control device controls the operation of the irrigation device based on a correlation between the measurement values of the first flow velocity sensor and the measurement values of the second flow velocity sensor.
  • ⁇ 2> The irrigation system described in ⁇ 1>, in which the first flow rate sensor is installed in the liquid delivery section of the irrigation device, and the second flow rate sensor is installed in the stem leading to the leaves of the plant, and measures the flow rate of the sap flowing toward the leaves.
  • ⁇ 3> The irrigation system described in ⁇ 1>, wherein the first flow velocity sensor is installed on a stem connected to a leaf of the plant and measures the flow velocity of the sap flowing toward the leaf, and the second flow velocity sensor is installed on a stem connected to a fruit or flower of the plant and measures the flow velocity of the sap flowing toward the fruit or flower.
  • ⁇ 4> The irrigation system described in ⁇ 2> or ⁇ 3>, wherein the control device determines the amount of water delivered by the irrigation device depending on whether the ratio of the measurement value of the second flow velocity sensor to the measurement value of the first flow velocity sensor is equal to or greater than a predetermined ratio.
  • ⁇ 5> The irrigation system described in ⁇ 4>, in which the control device controls the amount of liquid delivered by the irrigation device to be relatively smaller when the ratio is not equal to or greater than the predetermined ratio, compared to when the ratio is equal to or greater than the predetermined ratio.
  • ⁇ 6> The irrigation system described in ⁇ 2> or ⁇ 3>, wherein the control device calculates the relative volume of the plant's roots when the ratio of the measurement value of the second flow velocity sensor to the measurement value of the first flow velocity sensor becomes equal to or greater than a predetermined ratio.
  • ⁇ 8> The irrigation system described in ⁇ 7>, in which the control device determines the amount of water delivered by the irrigation device depending on whether the ratio of the measurement value of the second flow velocity sensor to the measurement value of the first flow velocity sensor is equal to or greater than a predetermined ratio.
  • ⁇ 10> An irrigation system according to any one of ⁇ 1> to ⁇ 9>, wherein the control device controls the operation of the irrigation device based on the correlation between the integrated value of the measurement value of the first flow velocity sensor and the integrated value of the measurement value of the second flow velocity sensor.
  • a program for controlling the operation of an irrigation device that supplies water to plants which, when executed by a processor, causes the processor to control the operation of the irrigation device based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions so as to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • a method for controlling the operation of an irrigation device that supplies water to a plant the irrigation device's operation being controlled based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions so as to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • a computer-readable medium for controlling the operation of an irrigation device that supplies water to a plant the computer-readable medium causing the processor, when executed by a processor, to control the operation of the irrigation device based on the correlation between the measured values of a first flow rate sensor and a second flow rate sensor that are installed at different positions to measure the flow rate of sap flowing through the plant or the flow rate of water flowing through the irrigation device.
  • the present disclosure is useful for irrigation systems, irrigation methods, programs, and computer-readable media for irrigating plants.
  • Irrigation system Plant 6 Irrigation device 7 Liquid delivery unit 8 Control device 9 Soil 10 Flow velocity sensor (first flow velocity sensor) 12 Flow velocity sensor (second flow velocity sensor) 16 Stem 18 Leaves 20 Fruit

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Cultivation Of Plants (AREA)

Abstract

Un système d'irrigation selon la présente divulgation comprend : un dispositif d'irrigation qui fournit de l'eau à une plante ; un dispositif de commande qui commande le fonctionnement du dispositif d'irrigation ; et un premier capteur de vitesse d'écoulement et un second capteur de vitesse d'écoulement qui sont installés à différentes positions de façon à mesurer la vitesse d'écoulement de la sève s'écoulant à travers la plante ou la vitesse d'écoulement de l'eau s'écoulant à travers le dispositif d'irrigation. Le dispositif de commande commande le fonctionnement du dispositif d'irrigation sur la base de la corrélation entre la valeur de mesure du premier capteur de vitesse d'écoulement et la valeur de mesure du second capteur de vitesse d'écoulement.
PCT/JP2024/039920 2023-11-15 2024-11-11 Système d'irrigation, procédé d'irrigation, programme et support lisible par ordinateur Pending WO2025105323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023194663 2023-11-15
JP2023-194663 2023-11-15

Publications (1)

Publication Number Publication Date
WO2025105323A1 true WO2025105323A1 (fr) 2025-05-22

Family

ID=95743013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2024/039920 Pending WO2025105323A1 (fr) 2023-11-15 2024-11-11 Système d'irrigation, procédé d'irrigation, programme et support lisible par ordinateur

Country Status (1)

Country Link
WO (1) WO2025105323A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002281842A (ja) * 2001-03-28 2002-10-02 Aichi Prefecture 少量高頻度潅水法を特徴とする施設園芸用自動潅水制御器
JP2008523811A (ja) * 2004-12-20 2008-07-10 フルーツ ワールド エンヴァイロ， エルエルシー 水耕栽培の方法およびそれに使用する構成要素
US20170219552A1 (en) * 2016-02-02 2017-08-03 Reinoud Jacob HARTMAN Method and apparatus for determining the rate of sap-content variation in living plants, and relating that to soil water tension, and transmitting the collected information
JP2017158449A (ja) * 2016-03-07 2017-09-14 静岡県 植物の自動給液システム及び養液栽培方法
KR20190116743A (ko) * 2018-04-05 2019-10-15 (주) 텔로팜 수액유속에 기초한 관개 제어 시스템 및 방법
JP2021069353A (ja) * 2019-11-01 2021-05-06 オムロン株式会社 植物生体センサ
JP2023025618A (ja) * 2021-08-10 2023-02-22 国立研究開発法人量子科学技術研究開発機構 植物の育成管理システム、植物の育成管理方法、師管転流速の測定方法及び師管転流速の算出プログラム、植物の生産方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002281842A (ja) * 2001-03-28 2002-10-02 Aichi Prefecture 少量高頻度潅水法を特徴とする施設園芸用自動潅水制御器
JP2008523811A (ja) * 2004-12-20 2008-07-10 フルーツ ワールド エンヴァイロ， エルエルシー 水耕栽培の方法およびそれに使用する構成要素
US20170219552A1 (en) * 2016-02-02 2017-08-03 Reinoud Jacob HARTMAN Method and apparatus for determining the rate of sap-content variation in living plants, and relating that to soil water tension, and transmitting the collected information
JP2017158449A (ja) * 2016-03-07 2017-09-14 静岡県 植物の自動給液システム及び養液栽培方法
KR20190116743A (ko) * 2018-04-05 2019-10-15 (주) 텔로팜 수액유속에 기초한 관개 제어 시스템 및 방법
JP2021069353A (ja) * 2019-11-01 2021-05-06 オムロン株式会社 植物生体センサ
JP2023025618A (ja) * 2021-08-10 2023-02-22 国立研究開発法人量子科学技術研究開発機構 植物の育成管理システム、植物の育成管理方法、師管転流速の測定方法及び師管転流速の算出プログラム、植物の生産方法

Similar Documents

Publication Publication Date Title
Prathyusha et al. Design of embedded systems for the automation of drip irrigation
US20100032493A1 (en) Precision variable rate irrigation system
JP6306384B2 (ja) 植物栽培における灌水の供給制御方法及びそのコントローラ
Shin et al. Development of a real-time irrigation control system considering transpiration, substrate electrical conductivity, and drainage rate of nutrient solutions in soilless culture of paprika (Capsicum annuum L.)
Mansour et al. Automation of mini-sprinkler and drip irrigation systems
Rico Automated pH monitoring and controlling system for hydroponics under greenhouse condition
KR20220097785A (ko) 수경재배용 배지의 배액량과 함수량을 이용한 관수 제어 시스템
JP4982823B2 (ja) 果実栽培における水管理方法
WO2025105323A1 (fr) Système d'irrigation, procédé d'irrigation, programme et support lisible par ordinateur
JP6757025B1 (ja) 潅水施肥システムとそれを用いた柑橘類の栽培方法
KR102154390B1 (ko) 수액유속에 기초한 관개 제어 시스템 및 방법
CN110896836A (zh) 一种无土栽培营养液管控方法及系统
Kim et al. Design and testing of an autonomous irrigation controller for precision water management of greenhouse crops
KR20140082289A (ko) 관수 제어방법
Vermeulen et al. Simultaneous response of stem diameter, sap flow rate and leaf temperature of tomato plants to drought stress
Kachwaya et al. Irrigation and fertigation systems for protected cultivation
RU78033U1 (ru) Система автоматического полива растений для приусадебного хозяйства
CN115989763A (zh) 温室灌溉控制方法、装置、系统及设备
KR102234522B1 (ko) 작물 증산량 및 근권 전이온농도를 복합 기준으로 하는 수경재배 양액 제어 방법
Yoon et al. Analysis of plant and fruit growth and yield under a micro sap flow sensor automated irrigation in substrate hydroponics for tomato cultivation
Kim et al. Diurnal variation characteristics of sap flow in Kimchi cabbage and of air temperature and relative humidity near the surface of cultivated soil
Shelford et al. Comparison of a new plant-based irrigation control method with light-based irrigation control for greenhouse tomato production
KR102649267B1 (ko) 식물 재배용 급수 배관 시스템
KR102703516B1 (ko) Ict 기술을 활용한 시설원예작물의 함수율 관리방법
Vernekar et al. Flow rate Controlled Water Sprinkler using myRIO controller and LabVIEW

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24891359

Country of ref document: EP

Kind code of ref document: A1