CN212570019U - Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication - Google Patents
Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication Download PDFInfo
- Publication number
- CN212570019U CN212570019U CN202021423758.3U CN202021423758U CN212570019U CN 212570019 U CN212570019 U CN 212570019U CN 202021423758 U CN202021423758 U CN 202021423758U CN 212570019 U CN212570019 U CN 212570019U
- Authority
- CN
- China
- Prior art keywords
- body temperature
- voltage
- lora
- livestock
- power consumption
- 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.)
- Active
Links
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 title abstract description 26
- 244000144972 livestock Species 0.000 title abstract description 26
- 238000004891 communication Methods 0.000 title abstract description 25
- 230000036760 body temperature Effects 0.000 title abstract description 23
- 238000012544 monitoring process Methods 0.000 title abstract description 9
- 238000012806 monitoring device Methods 0.000 abstract description 23
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- ZGHQUYZPMWMLBM-UHFFFAOYSA-N 1,2-dichloro-4-phenylbenzene Chemical compound C1=C(Cl)C(Cl)=CC=C1C1=CC=CC=C1 ZGHQUYZPMWMLBM-UHFFFAOYSA-N 0.000 description 4
- 210000000613 ear canal Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 108010003272 Hyaluronate lyase Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009304 pastoral farming Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model provides an ultra-low power consumption livestock body temperature monitoring system based on loRa scattering communication reduces monitoring devices's cost and consumption, reduces the volume and the weight of device simultaneously, a serial communication port, include: the monitoring devices are used for periodically acquiring the body temperature of the livestock and uploading body temperature data in a LoRa scattering communication mode; the LoRa gateway is used for receiving the body temperature data uploaded by the monitoring devices and forwarding the body temperature data to the upper level system; and a radio frequency base station for providing 433MHz radio frequency signals for scatter communication to monitoring devices in a surrounding area; monitoring devices includes waterproof shell, PCB board, button cell, temperature sensor and FPC antenna, PCB board, button cell and FPC antenna are fixed in the waterproof shell, integrated MCU, voltage controlled oscillator circuit, radio frequency switch, matching circuit, antenna interface and the temperature sensor interface on the PCB board, temperature sensor sets up in the middle of the livestock duct, is connected to the temperature sensor interface of PCB board through the signal line.
Description
Technical Field
The utility model relates to an ultra-low power consumption livestock body temperature monitoring system based on loRa scattering communication.
Background
In the livestock farming industry, the health of livestock is directly related to the production of the farm, and thus the farm helps to track the health of the livestock by measuring the body temperature of the livestock. The traditional manual measurement is generally used for measuring the rectal temperature of the livestock, the measurement mode is inefficient, the livestock can cause strong stress reaction, workers can be easily injured, and a more efficient and safer livestock body temperature monitoring scheme needs to be provided.
Among the monitoring devices that chinese patent "CN 110806277A pig is with body temperature real-time monitoring system" and "CN 106175715A ear installation formula livestock body temperature complex detection device" provided, wireless transceiver module adopts traditional wireless communication mode, need to use active communication chip, and this kind of chip has integrateed a large amount of radio frequency analog front end, and is with high costs (the single-chip price is also about 10 RMB under the thousand purchase quantities of low price communication chip), big power dissipation (the transmitting current is generally at 20mA to 300 mA). Meanwhile, in order to guarantee endurance, a battery that is too small cannot be used. In addition, the communication chip occupies a large and heavy space, so that the monitoring device is easy to drop or damage due to the movement and scratch of livestock, loss is caused, and the maintenance and management cost is increased.
Chinese patent "CN 109462419A a LoRa scattering communication system based on DDS direct digital frequency synthesis" proposes a LoRa scattering communication system, which encapsulates the data to be sent according to LoRa protocol to obtain Symbol, and then implements linear frequency modulation for each Symbol by updating frequency control word, and outputs the MSB highest bit of the phase accumulator to generate a corresponding digital square wave sequence; meanwhile, in order to comply with the timing requirement of CSS modulation, a digital square wave sequence needs to be stored in a memory and output to a radio frequency switch by a universal serial interface through a DMA direct memory access mode. The method has the advantages that the calculation amount for realizing CSS modulation is large, the software is complex, the program occupies large space, and the storage space of kB is needed to store the sequence of the highest bit of the phase accumulator, and a low-performance digital baseband processor with lower cost, such as MCU or FPGA, can not be selected in order to meet the requirements of storage space and calculation.
SUMMERY OF THE UTILITY MODEL
For overcoming the defect that exists among the prior art, the utility model provides an ultra-low power consumption livestock body temperature monitoring system based on loRa scattering communication reduces monitoring devices's cost and consumption, reduces the volume and the weight of device simultaneously, and its concrete technical content is as follows:
an ultra-low power consumption livestock body temperature monitoring system based on loRa scattering communication, it includes: the monitoring devices are used for periodically acquiring the body temperature of the livestock and uploading body temperature data in a LoRa scattering communication mode; the LoRa gateway is used for receiving the body temperature data uploaded by the monitoring devices and forwarding the body temperature data to the upper level system; and a radio frequency base station for providing 433MHz radio frequency signals for scatter communication to monitoring devices in a surrounding area; monitoring devices includes waterproof shell, PCB board, button cell, temperature sensor and FPC antenna, PCB board, button cell and FPC antenna are fixed in the waterproof shell, integrated MCU, voltage controlled oscillator circuit, radio frequency switch, matching circuit, antenna interface and the temperature sensor interface on the PCB board, temperature sensor sets up in the middle of the livestock duct, is connected to the temperature sensor interface of PCB board through the signal line.
In one or more embodiments of the invention, the monitoring device comprises an ear tag for attaching a waterproof shell over the livestock ear.
In one or more embodiments of the present invention, the temperature sensor is installed in the livestock ear canal through an ear canal installation device or a hose.
In one or more embodiments of the present invention, the voltage-controlled oscillator circuit includes an operational amplifier and a voltage-controlled frequency oscillator, the inverting terminal of the operational amplifier is used as the input terminal of the voltage-controlled oscillator circuit, and a resistor R3 is connected between the inverting terminal of the operational amplifier and the output terminal of the operational amplifier to form negative feedback connection, two ends of the resistor R3 are connected in parallel to form a capacitor C2, and the output terminal of the operational amplifier is connected to the input terminal of the voltage-controlled frequency oscillator.
In one or more embodiments of the present invention, the voltage-controlled oscillator circuit further includes voltage dividing resistors R1 and R2 connected in series between the output end of the operational amplifier and the ground, and the connection point of the voltage dividing resistors R1 and R2 is connected to the input end of the voltage-controlled frequency oscillator, and the connection point of the voltage dividing resistors R1 and R2 is connected to the in-phase end of the operational amplifier.
In one or more embodiments of the present invention, the voltage-controlled frequency oscillator chip is LTC6990, and the operational amplifier chip is LTC 6078.
In one or more embodiments of the present invention, the MCU is provided with a counter and a DAC conversion module, and the output of the counter is used as the input of the DAC conversion module, and the output value of the DAC conversion module is controlled by adjusting the initial value of the counter.
The utility model has the advantages that: the data are uploaded in a LoRa scattering communication mode, LoRa scattering communication is achieved through the low-power consumption MCU, the voltage-controlled oscillator circuit, the radio frequency switch, the matching circuit and the antenna, a high-cost communication chip is omitted, the cost of the monitoring device is reduced, meanwhile, the communication power consumption can be obviously reduced, and the endurance of the monitoring device is improved; in addition, the chip used by the voltage-controlled oscillator circuit in the scheme has small size (only 2 multiplied by 3mm and 3 multiplied by 3mm respectively), the peripheral circuit of the chip is simple, and the size of the PCB circuit board is smaller; meanwhile, the endurance can be ensured by using the small-size button battery with small capacity, so that the device has smaller volume and lighter weight, the uncomfortable feeling of wearing of livestock is reduced, and the possibility of falling or damage of the device caused by the movement and the scratch of the livestock is reduced. Particularly, the DAC is driven to output a linearly changing voltage value in a mode of controlling the counter, the voltage value is used for controlling the voltage-controlled oscillator to output CSS modulation signals to realize CSS modulation, the complexity and the calculation amount of software are reduced, the storage space of the MCU is saved, and the requirement on the performance of the MCU is reduced.
Drawings
Fig. 1 is a schematic diagram of the system framework of the present invention.
Fig. 2 is a schematic diagram of the monitoring device of the present invention.
Fig. 3 is a schematic diagram of the voltage-controlled oscillator circuit of the present invention.
Detailed Description
The scheme of the application is further described as follows:
referring to fig. 1 and 2, an ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication comprises: the monitoring devices 1 are used for periodically acquiring the body temperature of the livestock and uploading body temperature data in a LoRa scattering communication mode; the LoRa gateway 2 is used for receiving the body temperature data uploaded by the monitoring devices 1 and forwarding the body temperature data to the upper level system; and a radio frequency base station 3 for providing 433MHz radio frequency signals for scatter communication to the monitoring devices 1 in the surrounding area; the monitoring device 1 comprises a waterproof shell 11, a PCB 12, a button battery 13, a temperature sensor 14 and an FPC antenna 15, wherein the PCB 12, the button battery 13 and the FPC antenna 15 are fixed in the waterproof shell 11, the PCB 12 is integrated with an MCU 121, a voltage-controlled oscillator circuit 122, a radio frequency switch 123, a matching circuit 124, an antenna interface 125 and a temperature sensor interface 126, and the temperature sensor 14 is installed in an ear canal 41 of a livestock through an ear canal installation device or a hose and is connected to the temperature sensor interface 126 of the PCB 12 through a signal line; the waterproof case 11 is fixed on the ear 42 of the livestock through the ear tag 16.
Referring to fig. 3, the voltage-controlled oscillator circuit 122 includes an operational amplifier LTC6078 and a voltage-controlled frequency oscillator LTC6990, an inverting terminal of the operational amplifier LTC6078 serves as an input terminal of the voltage-controlled oscillator circuit 122, a resistor R3 is connected between the inverting terminal and the output terminal to form negative feedback connection, two ends of the resistor R3 are connected in parallel with a capacitor C2, and the output terminal of the operational amplifier LTC6078 is connected with the input terminal of the voltage-controlled frequency oscillator LTC 6990. The voltage-controlled oscillator circuit 122 further comprises voltage dividing resistors R1 and R2 connected in series between the output end of the operational amplifier LTC6078 and the ground end, a connection point of the voltage dividing resistors R1 and R2 is connected with the input end of the voltage-controlled frequency oscillator LTC6990, and a connection point of the voltage dividing resistors R1 and R2 is connected with the in-phase end of the operational amplifier LTC 6078.
The CSS modulated signal of LoRa, also known as the Chirp signal, is a sinusoidal wave with a frequency that varies linearly with time. Wherein, the UPChirp signal is in one symbol period TsymThe internal frequency being limited by the lower limit frequency FLLinearly increasing to an upper limit frequency FHOf (c) is a sine wave. Under CSS modulation, the value range of the LoRa symbol depends on the spreading factor SF and ranges from 0 to 2SF-1 and 2 in totalSFA symbol value; the modulation waveform corresponding to each symbol value N can be obtained by circularly shifting UP Chirp to the left on the time axis by N/2SF×TsymTo obtain wherein Tsym＝2SF/BW，BW＝FH-FLIs the bandwidth.
In order to realize the CSS modulation of LoRa, it is necessary to generate a modulation signal whose frequency varies linearly with time, the present embodiment proposes a scheme for realizing the CSS modulation by generating the CSS modulation signal through a voltage-controlled oscillator, that is, the voltage-controlled oscillator circuit 122. When the LTC6990 is a voltage-controlled frequency oscillator chip and works according to the circuit in the figure, the OUT pin of the LTC6990 outputs a square wave with a duty ratio of 50%, and the frequency of the square wave is linearly related to the voltage value of the V _ CTRL. Meanwhile, in order to reduce the error of the output square wave frequency, an operational amplifier chip LTC6078 is introduced. The voltage V _ DAC input to the inverting terminal of LTC6078 through resistor R4 can control the frequency of the square wave output by LTC6990, and the relationship is as follows:
when the voltage of the V _ DAC varies linearly between 0.625V and 1.875V, the output pin of the LTC6990 will output a frequency between 125kHz and 37 kHzThe bandwidth of the linear change between 5kHz is square wave of 250 kHz. In MCU, the output of counter is used as the input of DAC, and V _ DAC is controlled in one symbol period T by adjusting the initial value of countersymVarying between 0.625V and 1.875V at different timings, the LTC6990 can be controlled to output modulation signals corresponding to different LoRa symbols.
The MCU 121 is provided with a counter and a DAC conversion module, and the output of the counter is used as the input of the DAC conversion module, and the output value of the DAC conversion module is controlled by adjusting the initial value of the counter. The MCU adopts a low-power consumption MCU with a DAC function, so that the circuit structure can be simplified, and the cost can be saved.
The monitoring device in the scheme uploads the temperature data in a scattering communication mode:
1) when temperature data acquisition and uploading are needed, the MCU is awakened from a dormant state;
2) the MCU acquires temperature data through a temperature sensor;
3) according to the LoRa protocol specification, the MCU carries out Whitening scrambling, Hamming error correction coding, Interleaving and De-Gray coding on the LoRa data frame, and obtains a Symbol of LoRa;
4) controlling the DAC to change in the Symbol period according to the obtained Symbol, and driving the voltage-controlled oscillator to generate corresponding CSS modulation square wave signals to be output to the radio frequency switch;
5) the radio frequency switch controls the switch state according to the high and low levels of the digital square wave signals, absorbs or reflects 433MHz signals sent by the radio frequency base station, and sends out the signals in a scattering mode.
Because the working currents of LTC6990 and LTC6078 used in the voltage-controlled oscillator circuit of the scheme are only 72uA and 54uA respectively, the GPIO port of the MCU is used for supplying power to the voltage-controlled oscillator circuit, and the current requirement can be met. The MCU only supplies power to the voltage controlled oscillator circuit when data transmission is needed, so that the standby power consumption is reduced; in this way, the monitoring device only consumes the standby current of the MCU during standby, the transmission current during data transmission is the operating current of the voltage controlled oscillator circuit and the MCU, the transmission current is 200uA or less, and the transmission current for transmitting the LoRa data using the SX1278 module is 125mA, in contrast.
The monitoring device of the scheme adopts a small-size low-capacity button battery, such as a CR1025 (with the diameter of 10mm and the thickness of 2.5mm) button battery with the nominal capacity of only 30 mAh. Assuming a worst case standby current of 1 mua, one CR1205 button cell can be operated by the detection device for 3.3 years if the data is sent every 30 seconds, without regard to cell self-discharge.
The above preferred embodiments should be considered as examples of the embodiments of the present application, and technical deductions, substitutions, improvements and the like similar to, similar to or based on the embodiments of the present application should be considered as the protection scope of the present patent.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021423758.3U CN212570019U (en) | 2020-07-20 | 2020-07-20 | Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021423758.3U CN212570019U (en) | 2020-07-20 | 2020-07-20 | Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212570019U true CN212570019U (en) | 2021-02-19 |
Family
ID=74632097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021423758.3U Active CN212570019U (en) | 2020-07-20 | 2020-07-20 | Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212570019U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210185978A1 (en) * | 2019-09-06 | 2021-06-24 | Andy Doyle Jones | Method of Implementing a Lightweight, Electronic Ear Tag for Location Tracking and Geo-Fencing Tasks |
| CN114172526A (en) * | 2021-10-29 | 2022-03-11 | 武汉晴川学院 | Ultra-low power consumption LoRa transmitter based on crystal oscillator circuit |
| CN114189254A (en) * | 2021-10-29 | 2022-03-15 | 湖北大学 | Ultralow-power-consumption LoRa communication system and communication method based on single-frequency oscillator |
-
2020
- 2020-07-20 CN CN202021423758.3U patent/CN212570019U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210185978A1 (en) * | 2019-09-06 | 2021-06-24 | Andy Doyle Jones | Method of Implementing a Lightweight, Electronic Ear Tag for Location Tracking and Geo-Fencing Tasks |
| CN114172526A (en) * | 2021-10-29 | 2022-03-11 | 武汉晴川学院 | Ultra-low power consumption LoRa transmitter based on crystal oscillator circuit |
| CN114189254A (en) * | 2021-10-29 | 2022-03-15 | 湖北大学 | Ultralow-power-consumption LoRa communication system and communication method based on single-frequency oscillator |
| CN114189254B (en) * | 2021-10-29 | 2024-02-23 | 湖北大学 | Ultra-low power consumption LoRa communication system and communication method based on single-frequency oscillator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212570019U (en) | Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication | |
| CN211183954U (en) | Detachable bluetooth power supply unit | |
| CN211207486U (en) | Far and near infrared communication compatible circuit | |
| CN111710143A (en) | Ultra-low power consumption livestock body temperature monitoring system based on LoRa scattering communication | |
| CN204105980U (en) | A kind of electric sphygmomanometer | |
| CN209962405U (en) | Wireless remote control transmitter, receiver and wireless remote control system | |
| CN202404150U (en) | Current transducer | |
| CN204375156U (en) | A kind of learning-oriented bluetooth of super low-power consumption turns infrared remote-control device | |
| CN111724580A (en) | Ultralow-power-consumption soil temperature and humidity acquisition equipment and method based on LoRa scattering communication | |
| CN212570018U (en) | Ultralow-power-consumption soil temperature and humidity acquisition equipment based on LoRa scattering communication | |
| CN204831576U (en) | Low -power consumption multiple spot wireless temperature collection system based on NRF905 | |
| CN202871062U (en) | Control device for cervical vertebra rehabilitation device | |
| CN208572452U (en) | A kind of super low-power consumption wifi- serial ports transparent transmission conversion module | |
| CN115996454A (en) | Ear tag and low-power-consumption implementation method thereof based on radio frequency communication | |
| CN216647374U (en) | Detector QC data recovery circuit and system based on RFID | |
| CN212812047U (en) | Battery supply pressure transmitter based on LoRa wireless communication | |
| CN208806796U (en) | A kind of wireless voice call device system based on frequency range 433MHz | |
| CN202435243U (en) | Remote-frequency-control frequency converter | |
| CN112104995B (en) | A mushroom growth environment monitoring device and system capable of remote wake-up | |
| CN205545329U (en) | Thing networking gateway based on zigBee | |
| CN103327191A (en) | Audio-communication-based ZigBee network coordination system and mobile cell phone monitoring method | |
| CN221378509U (en) | General circuit of intelligent body-building equipment and intelligent body-building equipment | |
| CN218270916U (en) | wM-Bus wireless remote water meter | |
| CN203964958U (en) | A kind of envirment factor is concentrated harvester | |
| CN210640856U (en) | Radio frequency wireless control circuit device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |