CN105303205B - A flexible passive label, a passive flexible temperature measuring device and a wireless power supply networking temperature measuring system - Google Patents

Abstract

The present invention discloses a passive flexible tag, a passive flexible temperature measuring device and a wireless power supply network temperature measuring system. The passive flexible tag includes a flexible shell, a flexible printed circuit board and a temperature sensor, and is used to detect the temperature of the switch cabinet contact. The passive flexible temperature measuring device includes a passive flexible tag and a body, the body is a flexible strip, the flexible passive tag is fixed on the body, and the passive flexible temperature measuring device is installed at the connection between the plum blossom claw of the moving contact and the contact. The wireless power supply network temperature measuring system includes at least one wireless power supply and at least one passive flexible temperature measuring device. Each wireless power supply is networked with at least one passive flexible temperature measuring device to transmit radio frequency signals. Radio frequency signals can also be transmitted between temperature measuring devices and between wireless power supplies in the same network to form an intelligent sensor network to monitor the temperature of multiple points.

Description

A flexible passive label, a passive flexible temperature measuring device and a wireless power supply networking temperature measuring system

technical field

The invention relates to the field of switch cabinet temperature measuring devices, in particular to a flexible passive label adopting passive power acquisition, a passive flexible temperature measuring device installed on a moving contact, and an ad hoc network temperature measuring device using electromagnetic waves for wireless power supply system.

Background technique

High-voltage switchgear is an important electrical equipment in power plants and substations. At present, high-voltage switchgear generally adopts plug-type connection. During long-term operation, it is easy to generate heat due to long-term overloading of contacts or bus bar connections, loose joints, and aging of contacts, resulting in increased contact resistance and heating of contacts or bus bars. The temperature of the row connection will rise, which will lead to a further increase in its contact resistance, forming a vicious circle, and eventually causing the switchgear to fail. In recent years, there have been many serious accidents such as fires and large-scale power outages caused by overheating of switchgears in power plants and substations. Real-time monitoring of switchgear temperature and confirmation that the temperature of switchgear is within the allowable range is the key to preventing such accidents.

However, it is difficult to detect the operating temperature of the contacts in the high-voltage switch cabinet. This is mainly because there is high voltage in the cabinet, the space is narrow and mostly closed, and the usual temperature measurement method cannot be used. At present, there are two types of devices for measuring the temperature of the contacts of the high-voltage switchgear. One uses an analog temperature sensor, which has inaccurate temperature accuracy and poor anti-interference ability; the other is a digital temperature sensor, but uses wired transmission data. It is limited when used in a high-voltage cabinet. The existing temperature measuring device is too large to be installed on the moving contact, and is generally fixed on the static contact box which has a small limit on the volume of the temperature measuring device. However, during the installation operation, it is necessary to cut off the power of all the transmission lines related to the busbar connected to the switchgear, which has a large impact on normal production, especially for some busy lines, because the failure to power off even leads to the failure to install the temperature measuring probe smoothly. In addition, the existing temperature measuring device can only complete the temperature measurement at one junction, and the monitoring efficiency is not high.

Contents of the invention

The purpose of the present invention is to provide a flexible passive label, a passive flexible temperature measuring device and a wireless power supply network temperature measuring system to solve the problem that the existing high-voltage switchgear temperature measuring device has a large volume, cumbersome installation steps, and can only measure a single monitoring point temperature problem.

In order to solve the above problems, the present invention first provides a flexible passive label, including a flexible housing, a flexible printed circuit board and a temperature sensor; the flexible printed circuit board is packaged in the flexible housing; the flexible printed circuit board includes an energy harvesting circuit, a microprocessing device, radio frequency transmitting circuit, sensor circuit and ID memory; the energy harvesting circuit is respectively connected with the microprocessor, radio frequency transmitting circuit, sensor circuit and ID memory, as the power supply for the microprocessor, radio frequency transmitting circuit, sensor circuit and ID memory; The sensor circuit is respectively connected to the temperature sensor and the microprocessor, and the detection signal of the temperature sensor is processed and transmitted to the microprocessor; the ID memory is connected to the microprocessor, and the ID code of the flexible passive label is stored; the radio frequency transmitting circuit and the microprocessor Connect with the device, receive or transmit radio frequency signal, when the microprocessor obtains the ID code and temperature detection signal, it transmits the radio frequency signal through the radio frequency transmitting circuit.

Optionally, the energy collection circuit includes a passive electromagnetic induction power acquisition circuit, a vibration induction power acquisition circuit, a flexible battery, a power switching circuit, a power protection circuit, and a power state detection circuit. The passive electromagnetic induction power acquisition circuit is connected to the induction The electric coil receives the electromagnetic wave and converts the electromagnetic wave into electric energy; the output terminals of the passive electromagnetic induction power-taking circuit, the vibration induction power-taking circuit and the flexible battery are respectively connected to the input terminal of the power switching circuit, and the output terminal of the power switching circuit is connected to the power protection circuit The input terminal of the power supply protection circuit is connected to the power supply terminal of the microprocessor, the sensor circuit and the radio frequency transmitting circuit, and the output terminals of the passive electromagnetic induction power taking circuit, the vibration induction power taking circuit and the flexible battery are respectively connected to the power state detection circuit The input end of the power state detection circuit is connected to the microprocessor.

Optionally, the radio frequency transmitting circuit includes a radio frequency antenna, and the radio frequency antenna is a serpentine antenna arranged on a flexible printed circuit board.

Optionally, the temperature sensor is arranged inside the flexible casing, or outside the flexible casing, or one temperature sensor is arranged inside the flexible casing and one outside the flexible casing; both the inside of the flexible casing and the outside of the flexible casing are arranged When there is a temperature sensor, the front end of the sensor circuit is provided with a sensor signal switching circuit, the temperature sensor on the flexible printed circuit board and the temperature sensor on the outside of the flexible shell are respectively connected to the input end of the sensor signal switching circuit, and the output end of the sensor signal switching circuit is connected to Input to the sensor circuit.

Optionally, the flexible battery includes a flexible circuit board and a solid electrolyte.

Optionally, the power state detection circuit includes a first resistor, a first diode and a second diode, one end of the resistor is connected to the power supply end of the microprocessor, the sensor circuit and the radio frequency transmitting circuit, and the other end is respectively connected to the first The anode of the diode and the anode of the second diode, the cathode of the first diode is connected to the IO port of the microprocessor, the cathode of the second diode is connected to the source of the first FET, and the drain of the first FET The ground and the grid are connected to the passive electromagnetic induction power taking circuit, the vibration induction power taking circuit and the output of the battery.

Optionally, the power supply protection circuit includes a low-voltage detection chip with a watchdog function and an energy storage capacitor, the energy storage capacitor is connected to the power supply terminal, the input terminal of the low-voltage detection chip is connected to the detection point, and the output terminal is connected to the second The gate of the field effect transistor, the source of the second field effect transistor is grounded through the second resistor, the drain is connected to the gate of the third field effect transistor, the drain of the third field effect transistor is connected to the power supply terminal, and the source is connected to the detection point , the output of the low-voltage detection chip is also connected to the reset pin of the microprocessor through the third resistor.

The present invention also provides a passive flexible temperature measuring device, which includes a body and a flexible passive label. The body is a flexible strip with a locking mechanism at a fixed position. The flexible passive label is fixed on the body. Installed at the connection between the plum blossom claw of the moving contact and the contact.

Optionally, the induction power-taking coil is a tinfoil-shaped flexible metal alloy strip, and the induction power-taking coil is packaged in the body.

The present invention also provides a wireless power supply networking temperature measurement system, including at least one wireless power supply and at least one passive flexible temperature measurement device, the wireless power supply includes a wireless power supply antenna and an information collection module; each wireless power supply The electrical appliances are networked with at least one passive flexible temperature measuring device, and radio frequency signals are transmitted between a networked wireless power supply and at least one passive flexible temperature measuring device through the wireless power supply antenna and the radio frequency antenna.

Optionally, the passive flexible label in the passive flexible temperature measuring device further includes a networking module, and radio frequency signal transmission and communication can be performed between the passive flexible temperature measuring device that is networked with a wireless power supply.

Optionally, the wireless power supply further includes a networking module, and radio frequency signal transmission and communication can be performed between the wireless power supplies.

Compared with the prior art, this technical solution has the following advantages:

1. Since the passive flexible label of the present invention includes a flexible housing, a flexible printed circuit board and an induction coil, and the flexible printed circuit board is packaged in the flexible housing, the passive flexible label of the present invention is small in size and thin in thickness, suitable for It is installed at the connection between the plum blossom claw of the moving contact and the contact, thereby solving the problem that the existing temperature measuring device is too large to be installed on the moving contact.

2. Since the energy harvesting circuit of the present invention includes a passive electromagnetic induction power acquisition circuit, a vibration induction power acquisition circuit, and a flexible battery, the passive electromagnetic induction power acquisition circuit is connected to an induction power acquisition coil to convert electromagnetic waves into electric energy, and vibration induction power acquisition The circuit and the flexible battery are the backup power supply, so that the passive flexible label of the present invention realizes passive power acquisition and redundant power supply, good power supply stability, and low maintenance cost after installation, thereby solving the problem of power supply stability of existing temperature measuring devices. low and high maintenance costs.

3. Since the body of the passive flexible temperature measuring device of the present invention is a flexible strip, the flexible passive label is fixed on the body, so that when the passive flexible temperature measuring device of the present invention is installed, the body is moved along the plum blossom claw of the moving contact The surface of the joint with the contact is wound around and the position is fixed, without power failure of the whole line, thereby solving the problem of cumbersome installation and operation of the existing temperature measuring device.

4. Since the wireless power supply networking temperature measurement system of the present invention includes at least one wireless power supply and at least one passive flexible temperature measurement device, each wireless power supply is networked with at least one passive flexible temperature measurement device, so that the present invention The wireless power supply network temperature measurement system can monitor the temperature of multiple points, thereby solving the problem that the existing temperature measurement device can only monitor the temperature of a single key point.

Description of drawings

Fig. 1 is a schematic structural diagram of a flexible passive tag according to an embodiment of the present invention.

Fig. 2 is a structural block diagram of a flexible printed circuit board according to an embodiment of the present invention.

FIG. 3 is a schematic circuit diagram of a power detection circuit according to an embodiment of the present invention.

FIG. 4 is a schematic circuit diagram of a power supply protection circuit according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a passive flexible temperature measuring device according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of the installation of the passive flexible temperature measuring device according to the embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an ad hoc network temperature measurement system with wireless power supply according to an embodiment of the present invention.

Fig. 8 is another structural schematic diagram of the wireless power supply ad hoc network temperature measurement system according to the embodiment of the present invention.

detailed description

The technical solutions of the present invention will be clearly and completely described below through specific embodiments in conjunction with the accompanying drawings.

The invention discloses a passive flexible temperature measuring device, which includes a flexible passive label 100 and a body 200 . The flexible passive tag 100 includes a flexible shell 7 , a flexible printed circuit board and an inductive power-taking coil 24 . The flexible shell 7 is a silicone shell, and the flexible printed circuit board is packaged in the flexible shell 7, so that the flexible printed circuit board is free from external interference.

Please refer to FIG. 1 , in this embodiment, the flexible printed circuit board includes an energy harvesting circuit 1 , a microprocessor 2 , a radio frequency transmitting circuit 3 , a sensor circuit 4 , a temperature sensor 5 and an ID memory 6 . The energy harvesting circuit 1 is connected to the microprocessor 2, the radio frequency transmitting circuit 3, the sensor circuit 4 and the ID memory 6 respectively, and is used as the power supply of the microprocessor 2, the radio frequency transmitting circuit 3, the sensor circuit 4 and the ID memory 6; the sensor circuit 4 Connect the temperature sensor 5 and the microprocessor 2 respectively, process the detection signal of the temperature sensor 5, and transmit it to the microprocessor 2; the ID memory 6 is connected with the microprocessor 2, and encode the stored ID of the flexible passive tag It is transmitted to the microprocessor 2; the radio frequency transmitting circuit 3 is connected to the microprocessor 2 to receive or transmit the radio frequency signal, and when the microprocessor obtains the ID code and the temperature detection signal, the radio frequency signal is transmitted through the radio frequency transmitting circuit.

Please refer to FIG. 2 , in this embodiment, the energy harvesting circuit 1 includes a passive electromagnetic induction power acquisition circuit 8 , a vibration induction power acquisition circuit 9 , a flexible battery 10 , a power switching circuit 11 , a power protection circuit 12 and a power state detection circuit. 13. The passive electromagnetic induction power acquisition circuit 8, the vibration induction power acquisition circuit 9, and the flexible battery 10 are three mutually independent power sources, that is, by setting multiple power supply sources, the redundant backup of the power supply sources is increased. The passive electromagnetic induction power acquisition circuit 8 receives electromagnetic waves through the induction power acquisition coil 24, and converts the electromagnetic waves into electrical energy; the vibration induction power acquisition circuit 9 converts the vibration energy in the environment where the circuit is located into electrical energy; the flexible battery includes a flexible circuit board and Solid electrolyte, stable power supply voltage, small size, can be stretched and cut.

The output terminals of the passive electromagnetic induction power taking circuit 8, the vibration induction power taking circuit 9 and the flexible battery 10 are respectively connected to the input end of the power switching circuit 11, and the output end of the power switching circuit 11 is connected to the input end of the power protection circuit 12, and the power protection The output end of the circuit 12 is connected to the power supply end of the microprocessor 2, the radio frequency transmitting circuit 3, the sensor circuit 4 and the ID memory 6; Connect the input terminal of the power state detection circuit 13, the power state detection circuit 13 detects the passive electromagnetic induction power acquisition circuit 8, the vibration induction power acquisition circuit 9 and the flexible battery 10 and outputs the detection signal to the microprocessor 2; The device 2 is connected to the power switching circuit 11, and one of them that meets the power supply requirements is selected as the actual power supply through the power switching circuit 11, so as to improve the power supply stability of the device and facilitate production and debugging in the workshop.

Usually, the passive electromagnetic induction power acquisition circuit 8 is the main power supply, the vibration induction power acquisition circuit 9 is the secondary power supply, and the flexible battery 10 is the backup power supply. When the passive electromagnetic induction power acquisition circuit 8, the vibration induction power acquisition circuit 9 and the flexible battery When the outputs of 10 all meet the power supply requirements, the output of the passive electromagnetic induction power taking circuit 8 is preferentially used as the power supply, followed by the output of the vibration induction power taking circuit 9 as the power supply. Only when the passive electromagnetic induction power taking circuit 8 The flexible battery 10 is used as the power supply only when the output of the vibration induction power-taking circuit 9 does not meet the requirements.

Please refer to FIG. 3 , in this embodiment, the power state detection circuit 13 includes a resistor R10 , diodes D9 and D10 and a field effect transistor Q6 . One end of the resistor R10 is connected to the power supply terminal Vcc of the microprocessor 2, the sensor circuit 3 and the radio frequency transmitting circuit 1, and the other end is respectively connected to the anode of the diode D9 and the anode of the diode D10; the cathode VE of the diode D9 is connected to the IO pin of the microprocessor; the cathode of the diode D10 The source of the field effect transistor Q6 is connected, the drain of the field effect transistor Q6 is grounded, and the gate is connected to the passive electromagnetic induction power taking circuit 10 , the vibration induction power taking circuit 11 and the output end of the flexible battery 12 . The normal output of the passive electromagnetic induction power acquisition circuit 10 , the vibration induction power acquisition circuit 11 and the flexible battery 12 is 6.2V. The microprocessor uses the collected value at the cathode VE of the diode D9 to judge the current power supply status. If the voltage of the cathode VE of the diode D9 changes from high to low, the power supply is supplied by the passive electromagnetic induction power supply mode to the shock induction circuit 8. The power-taking circuit 9 or the flexible battery 10 are converted.

Please refer to FIG. 4. In this embodiment, the power supply protection circuit 12 includes two energy storage capacitors C6, C8, and the two energy storage capacitors C6, C8 are connected in parallel with the power supply terminal Vcc. After the power supply terminal Vcc is powered off, the energy storage capacitors C6, C8 C8 provides storage power for storing data to the microprocessor 2, improving system stability. Since it takes about 50ms for the microprocessor 2 to write the 8 bytes of double backup, the writing current is about 2mA, and when the voltage of the microprocessor 2 is 5V, the operating current of the microprocessor 2 is about 8mA. Assuming that the energy storage capacitor is discharged from 5V to 3.8V, it can be known by calculation that 0.05s×0.01A/(5V-3.8V)=417uF, so an energy storage capacitor with a capacitance value of 470uF is connected in parallel to the power supply terminal Vcc of the system It can fully satisfy the storage power supply after the main power supply is cut off. Connect two capacitors with a capacitance value of 470uF in parallel to the power supply terminal Vcc to increase the total capacity of the energy storage capacitor and increase the storage capacity to ensure that the storage power supply after the main power supply is turned off is fully satisfied.

The power supply protection circuit 12 includes a low-voltage detection chip U2 with a watchdog function. The input end of the low-voltage detection chip U2 is connected to the output terminal V of the power switching circuit, and the output end of the low-voltage detection chip U2 is connected to the gate of the field effect transistor Q4. Connect the RST reset pin of the microprocessor 2 through the resistor R9; the source of the field effect transistor Q4 is grounded through the resistor R8, and the drain is connected to the gate of the field effect transistor Q2; the drain of the field effect transistor Q2 is connected to the power supply terminal Vcc, the source The pole is connected to the output terminal V of the power switching circuit. When the voltage at the output terminal V of the power switching circuit is greater than the threshold value of the low-voltage detection chip U2, the output of the low-voltage detection chip U2 is high, the switch of the field effect transistor Q2 is turned off, and the power supply terminal Vcc is normally powered; when the output terminal V of the power switching circuit is at When the voltage is lower than the threshold value of the low-voltage detection chip U2, the switch of the field effect transistor Q2 is closed, the power supply is pulled down and the power supply is stopped, the RST reset pin of the microprocessor 2 receives the reset signal, and the microprocessor 2 resets and supplies power after the reset. The power supply stops, and the energy storage capacitors C6 and C8 continue to supply power to the microprocessor 2 to keep the microprocessor 2 working for a period of time. Generally, the threshold value of the low-voltage detection chip U2 is 2.4V, which not only ensures stability, but also does not interfere with the normal operation of the temperature measuring device.

The radio frequency transmitting circuit 3 includes a radio frequency antenna. The radio frequency antenna is a serpentine antenna arranged on a flexible printed circuit board, which reduces the area occupied by the antenna, thereby reducing the thickness of the flexible passive label 100 . In this embodiment, the radio frequency signal transmitted by the radio frequency transmitting circuit 3 is a 433 MHz radio frequency signal with strong penetrating power, which is suitable for the complex communication environment of the switch cabinet. In other embodiments, the radio frequency signal is a wireless electromagnetic wave signal of other frequency bands.

In this embodiment, there is a temperature sensor 5 inside the flexible casing. In other embodiments, the temperature sensor may be placed outside the flexible shell, or one temperature sensor may be provided on the inside of the flexible shell and one outside the flexible shell. If a temperature sensor is provided on the inner side of the flexible housing and on the outer side of the flexible housing, a sensor signal switching circuit is also provided at the front end of the sensor circuit 4, and the temperature sensor 5 on the inner side of the flexible housing and the temperature sensor on the outer side of the flexible housing are respectively connected to the input terminals of the sensor signal switching circuit , the output end of the sensor signal switching circuit is connected to the input end of the sensor circuit 4 to ensure that the signals of the two temperature sensors can be transmitted to the microprocessor 2 after being switched by the sensor signal. In this case, if one of the temperature sensors is damaged, the other one continues to monitor the temperature, which improves the reliability; and simultaneously detects the temperature inside and outside the flexible passive label 100, which improves the accuracy of temperature monitoring.

Please refer to FIG. 5 , in this embodiment, the body 200 is a flexible strip, and the flexible passive tag 100 is packaged in the body 200 , which is easy to install, and makes the flexible passive tag 100 free from external interference and has high reliability. The main body 200 includes a positioning hole 21 and several tabs 22 for fixing positions of the locking mechanism. The positioning hole 21 is disposed at one end of the body 200 , the tab 22 is disposed at the other end of the body 200 , and the flexible passive tag 100 is located between the positioning hole 21 and the tab 22 . Several protruding pieces 22 are equally spaced to the end of the body 200, with a distance of 2cm to 3cm. The distance between the flexible passive tag 100 and the positioning hole 21, and the distance between the flexible passive tag 100 and the nearest protruding piece 22 are all less than Or equal to 1.5cm.

In this embodiment, the induction coil 24 of the passive flexible tag 100 is two tinfoil-shaped flexible metal alloy strips with a thickness of 2mm. The alloy strips are packaged in the body 200 and located on both sides of the flexible passive tag 100 respectively. One end of the two alloy strips close to the flexible passive tag 100 is connected to the passive electromagnetic induction power-taking circuit 8 of the flexible passive tag 100 , and the other end is fixed by a metal fitting fixing structure 25 , 26 similar to a button.

Please refer to Fig. 6, in this embodiment, the movable contact includes a movable plum blossom claw 31, a contact 32 and a movable contact arm 30, the contact 32 is cylindrical, and the joint 33 between the plum blossom claw 31 and the contact 32 is also shaped like Cylindrical, the cross-sectional diameter of the joint 33 is smaller than the cross-sectional diameter of the contact 32 . Since the flexible passive tag 100 is small in size and thin in thickness, the passive flexible temperature measuring device is suitable to be installed here. The specific installation method is to make the body 200 circle around the surface of the joint 33 between the plum blossom claw 31 and the contact 32 and fix the position. During installation, the end of the main body 200 passes through the positioning hole 21, and when the flexible passive tag 100 is close to the moving contact, the tab 22 is inserted into the positioning hole 21 to fix its position. Since the distance between the lugs 22 is small, the tightness of the body 200 can be adjusted more accurately during the fixing process, ensuring that the flexible passive label 100 is tightly attached to the moving contact. The body 200 is also provided with a clasp 23, and the rest of the body 200 surrounds the surface of the joint 33 between the plum blossom claw 31 and the contact 32 passes through the clasp 23 and is tightened to reduce the space occupied by the moving contact. Prevent the rest of the body 200 from interfering with the operation of the movable contact.

During installation, the button-like metal fittings and fixing structures 25 and 26 are connected, and the induction power-taking coil 24 packaged in the body 200 becomes a ring coil along with the body 200, and is connected with the passive electromagnetic induction power-taking circuit 8 in the passive flexible label 100. The connections form a closed loop that converts electromagnetic waves into electrical signals.

The passive flexible temperature measuring device has the characteristics of passive power acquisition and wireless transmission. The passive feature enables live debugging of the temperature measuring device during installation, and the maintenance cost after installation is low; the wireless feature ensures sufficient electrical separation distance and high reliability.

In this embodiment, the flexible passive tag 100 is packaged in the body 200 . In other embodiments, the body 200 can also pass through the shell of the flexible passive tag 100 . In this case, the body 200 and the flexible passive tag 100 are designed separately to facilitate maintenance of the flexible passive tag 100 . In this case, the flexible passive tag 100 is fixed on the body 200 in various ways such as screw fixing or bonding.

Please refer to FIG. 7 , the embodiment of the present invention also discloses a wireless power supply networking temperature measurement system. The wireless power supply ad hoc network temperature measurement system in this embodiment includes a wireless power supply 400 and a passive flexible temperature measurement device installed at a temperature monitoring point. The wireless power supply 400 includes a wireless power supply antenna, a temperature measurement sensor, a networking module, an information collection module and a communication interface. The radio frequency signal is transmitted between the wireless power supply and the temperature measuring device through the wireless power supply antenna and the radio frequency antenna.

The wireless power supply 400 transmits electromagnetic waves through the antenna of the wireless power supply, and the flexible passive tag 100 in the temperature measuring device converts the electromagnetic waves into electric energy through the induction coil 24, and through the energy collection circuit 1, the microprocessor 2, the radio frequency transmission circuit 3 and the For the power supply of the sensor circuit 4, the effective power supply distance of the electromagnetic wave is about 20m. At this time, the flexible passive tag 100 enters the normal working state, the input terminal of the microprocessor 2 collects the data of the high-precision temperature sensor 5, and sends the collected data to the wireless power supply 1 through the radio frequency antenna of the radio frequency transmission circuit 3, and the wireless power supply The electrical appliance 1 obtains the current temperature value through the antenna of the wireless power supply, thereby realizing temperature monitoring.

Usually, the frequency of the electromagnetic wave emitted by the radio frequency transmitting circuit 3 is 433MHz, and the frequency of the electromagnetic wave emitted by the wireless power supply 400 is 850MHz to 900MHz, especially when the frequency is 900MHz, the electromagnetic wave signal has a strong penetrating ability and is suitable for communication in the complex environment of the switch cabinet.

The wireless power supply 400 can also process the received temperature detection signal and transmit it to the monitoring platform through the communication interface, which is convenient for staff to monitor on the monitoring platform.

Please refer to FIG. 8 , the embodiment of the present invention also discloses another wireless power supply networking temperature measurement system. The wireless power supply ad hoc network temperature measurement system in this embodiment includes a wireless power supply 400 and several flexible passive temperature measurement devices, and the temperature measurement devices are fixed at different temperature monitoring points. The flexible passive tag 100 of each temperature measuring device has a built-in ID memory 10 for storing ID codes, and the ID codes are used to distinguish each flexible passive tag 100, so that the wireless power supply 400 can distinguish the source of the temperature detection signal read. Which temperature monitoring point, through the cooperation of a wireless power supply 400 and multiple temperature measuring devices, realizes the temperature detection of multiple monitoring points.

The embodiment of the invention also discloses a third wireless power supply networking temperature measurement system. The wireless power supply ad hoc network temperature measurement system in this embodiment includes several wireless power supplies 400 and several flexible passive temperature measurement devices, the temperature measurement devices are fixed at different temperature monitoring points, and each wireless power supply 400 corresponds to several Temperature measuring device.

In this embodiment, the wireless power supply 400 implements the function of relaying and forwarding data through the information collection module, which can collect data to a wireless power supply 400 with a centralized terminal, and then upload the data to the computer through the communication interface. The flexible passive tag 100 of the temperature measuring device includes a networking module that realizes the wireless ad hoc network function, and any two flexible passive tags 100 can communicate with each other. After networking, the ID code of each flexible passive tag 100 can be freely allocated without manual setting, and a communication network is formed after allocation. The flexible passive tag 100 can also select the optimal path to form a real intelligent sensor network.

In application, because the wireless power supply 400 includes a networking module, the wireless power supply 400 can also form a network, thereby realizing the data routing function and greatly enhancing the wireless transmission distance.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (10)

1. A flexible passive tag, characterized in that it comprises a flexible shell, a flexible printed circuit board and a temperature sensor; A flexible printed circuit board is encapsulated in a flexible housing; Flexible printed circuit board includes energy harvesting circuit, microprocessor, radio frequency transmitting circuit, sensor circuit and ID memory; energy harvesting circuit includes passive electromagnetic induction power taking circuit, vibration induction power taking circuit, flexible battery, power switching circuit, power protection The circuit and the power state detection circuit, the passive electromagnetic induction power acquisition circuit is connected to the induction power acquisition coil, receives electromagnetic waves, and converts the electromagnetic waves into electric energy; the passive electromagnetic induction power acquisition circuit, the vibration induction power acquisition circuit and the output end of the flexible battery are respectively connected The input end of the power switching circuit, the output end of the power switching circuit is connected to the input end of the power protection circuit, the output end of the power protection circuit is connected to the power end of the microprocessor, the sensor circuit and the radio frequency transmitting circuit, the passive electromagnetic induction power-taking circuit, The vibration induction power-taking circuit and the output end of the flexible battery are respectively connected to the input end of the power state detection circuit, and the output end of the power state detection circuit is connected to the microprocessor; The energy harvesting circuit is respectively connected with the microprocessor, the radio frequency transmitting circuit, the sensor circuit and the ID memory, as the power supply of the microprocessor, the radio frequency transmitting circuit, the sensor circuit and the ID memory; the radio frequency transmitting circuit comprises a radio frequency antenna, and the radio frequency The antenna is a serpentine antenna on a flexible printed circuit board; The sensor circuit is respectively connected to the temperature sensor and the microprocessor, processes the detection signal of the temperature sensor, and transmits it to the microprocessor; The ID memory is connected to the microprocessor and stores the ID code of the flexible passive tag; The radio frequency transmitting circuit is connected with the microprocessor to receive or transmit the radio frequency signal, and when the microprocessor obtains the ID code and the temperature detection signal, it transmits the radio frequency signal through the radio frequency transmitting circuit. 2. The flexible passive tag according to claim 1, wherein the temperature sensor is arranged on the inside of the flexible casing, or on the outside of the flexible casing, or a temperature sensor is respectively set on the inside of the flexible casing and on the outside of the flexible casing. Sensor; when the inside of the flexible shell and the outside of the flexible shell are provided with temperature sensors, the front end of the sensor circuit is provided with a sensor signal switching circuit, and the temperature sensor on the flexible printed circuit board and the temperature sensor on the outside of the flexible shell are respectively connected to the sensor signal The input end of the switching circuit, the output end of the sensor signal switching circuit is connected to the input end of the sensor circuit. 3. The flexible passive label according to claim 1, wherein the flexible battery comprises a flexible circuit board and a solid electrolyte. 4. The flexible passive label according to claim 1, wherein the power state detection circuit includes a first resistor, a first diode and a second diode, and one end of the resistor is connected to the microprocessor and the sensor circuit and the power supply end of the RF transmitting circuit, the other end is respectively connected to the anode of the first diode and the anode of the second diode, the cathode of the first diode is connected to the IO port of the microprocessor, and the cathode of the second diode is connected to the first field The source of the effect tube, the drain of the first field effect tube are grounded, and the grid is connected to the passive electromagnetic induction power-taking circuit, the vibration induction power-taking circuit and the output of the battery. 5. The flexible passive label according to claim 1, wherein the power supply protection circuit includes a low-voltage detection chip with a watchdog function and an energy storage capacitor, the energy storage capacitor is connected to the power supply terminal, and the low-voltage The input end of the detection chip is connected to the detection point, the output end is connected to the gate of the second field effect transistor, the source of the second field effect transistor is grounded through the second resistor, and the drain is connected to the gate of the third field effect transistor. The drain of the effect tube is connected to the power supply terminal, and the source is connected to the detection point, and the output of the low-voltage detection chip is also connected to the reset pin of the microprocessor through the third resistor. 6. A passive flexible temperature measuring device, characterized in that it comprises a body and the flexible passive label as claimed in claim 1, the body is a flexible strip with a locking mechanism at a fixed position, the flexible wireless The source label is fixed on the body, and the body is installed at the connection between the plum blossom claw of the moving contact and the contact. 7. The passive flexible temperature measuring device according to claim 6, characterized in that, the induction power-taking coil is a tinfoil-shaped flexible metal alloy strip, and the induction power-taking coil is packaged in the body. 8. A wireless power supply network temperature measurement system, characterized in that it includes at least one wireless power supply and at least one passive flexible temperature measurement device as claimed in claim 6, the wireless power supply includes a wireless power supply antenna, Information collection module; each wireless power supply is networked with at least one passive flexible temperature measuring device, and a wireless power supply and at least one passive flexible temperature measuring device in the network are connected to each other through a wireless power supply antenna and a radio frequency antenna. transmission. 9. The power supply networking temperature measurement system according to claim 8, wherein the passive flexible label in the passive flexible temperature measurement device also includes a networking module, and a wireless power supply networking passive The transmission and communication of radio frequency signals are carried out between the flexible temperature measuring devices. 10. The wireless power supply networking temperature measurement system according to claim 8, wherein the wireless power supply further includes a networking module, and the wireless power supply performs transmission and communication of radio frequency signals.