CN107328488B - Composite sensor system based on electric field induction - Google Patents
Composite sensor system based on electric field induction Download PDFInfo
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- CN107328488B CN107328488B CN201610279259.3A CN201610279259A CN107328488B CN 107328488 B CN107328488 B CN 107328488B CN 201610279259 A CN201610279259 A CN 201610279259A CN 107328488 B CN107328488 B CN 107328488B
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- 230000006698 induction Effects 0.000 title claims abstract description 45
- 230000005684 electric field Effects 0.000 title claims abstract description 38
- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 238000004146 energy storage Methods 0.000 claims abstract description 73
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 12
- 239000003990 capacitor Substances 0.000 claims description 37
- 238000012545 processing Methods 0.000 claims description 18
- 230000005672 electromagnetic field Effects 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a composite sensor system based on electric field induction, which comprises an electric field induction module, an electrified warning module, a system energy storage module, a main control module, a wireless transceiver module and a temperature measurement module; the system comprises an electric field sensing module, a wireless transceiver module, a temperature measuring module, a live warning module, a main control module, a system energy storage module, a live warning module and a temperature measuring module, wherein the live warning module and the system energy storage module are connected with the electric field sensing module; the electric field induction module is used for acquiring induction voltage and outputting the induction voltage to the electrified warning module and the system energy storage module; the electrification warning module is used for carrying out luminous indication when the induction voltage is higher than a preset value; the system energy storage module is used for storing the induced voltage to form an energy storage voltage, and controlling the main control module to be started or closed when the energy storage voltage reaches a preset value; the temperature measurement module is used for detecting a temperature signal and sending a temperature value to the main control module. The electric field induction electricity taking efficiency is improved, so that the volume of a sensor system is reduced, and the installation and the debugging of the sensor are simplified.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a composite sensor system based on electric field induction.
Background
The wireless temperature sensor is generally composed of an energy source, a microprocessor, a temperature sensing element and a wireless transmission module. The energy source provides working energy for other elements (microprocessors, temperature sensing elements, wireless transmission modules) of the whole sensor. The sensor is arranged on the target monitoring equipment, the microprocessor collects temperature information of the temperature measuring element at a certain time interval, the temperature information is transmitted to the on-line monitoring centralized receiving device through the wireless transmission module, and the centralized receiving device analyzes, early-warns, alarms and the like on the temperature condition, so that the purpose of on-line monitoring is achieved.
With the development of scientific technology, the passive wireless sensing technology is gradually applied to on-line monitoring of power equipment. The energy acquisition technology of the current passive wireless sensor mainly comprises the following steps: SAW surface acoustic wave, TEG thermoelectric generation, RFID tag, CT electromagnetic induction, and electric field coupling induction.
According to the current development situation of the industry, the passive wireless sensor has the advantages of large volume, difficult installation and debugging, single monitoring parameter and incapability of large-area popularization and application.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a composite sensor system based on electric field induction, which can improve the electric field induction electricity taking efficiency so as to reduce the volume of a sensor.
The invention adopts the following technical scheme:
the composite sensor system based on the electric field induction comprises an electric field induction module, an electrified warning module, a system energy storage module, a main control module, a wireless transceiver module and a temperature measurement module; the system comprises an electric field sensing module, a live warning module, a main control module, a wireless transceiver module, a temperature measuring module and a wireless sensor module, wherein the live warning module and the system energy storage module are connected with the electric field sensing module; the electric field induction module is used for acquiring induction voltage and outputting the induction voltage to the electrified warning module and the system energy storage module; the electrification warning module is used for carrying out luminous indication when the induction voltage is higher than a preset value; the system energy storage module is used for storing the induced voltage to form an energy storage voltage, and controlling the main control module to be started or closed when the energy storage voltage reaches a preset value; the temperature measurement module is used for detecting temperature signals and sending temperature values to the main control module, and the main control module sends the temperature values to an external receiving device through the wireless transceiver module.
Preferably, the composite sensor system further comprises a current measurement module connected with the main control module, wherein the current measurement module is used for detecting electromagnetic intensity signals and sending current values to the main control module.
Preferably, the temperature measurement module comprises a temperature sensing element and a signal processing module, the temperature sensing element, the signal processing module and the main control module are sequentially connected, the temperature sensing element is used for detecting a temperature signal and sending the temperature signal to the signal processing module, the signal processing module is used for filtering the temperature signal, processing the temperature signal to obtain a temperature value, and sending the temperature value to the main control module.
Preferably, the current measurement module comprises a magneto-resistive element and a TRMS module, the magneto-resistive element, the TRMS module and the main control module are sequentially connected, the magneto-resistive element is used for detecting an electromagnetic field intensity signal and sending the electromagnetic field intensity signal to the TRMS module, the TRMS module is used for processing the electromagnetic field intensity signal to obtain a current value, and sending the current value to the main control module.
Preferably, the electric field induction module comprises a high-voltage charged body and a PCB copper foil, and the system energy storage module comprises a rectifier bridge stack B1, an energy storage capacitor C1, an energy storage capacitor EC2, a high-voltage trigger diode D1, a diode D2, a transformer T1, a power management chip U1, a resistor R1 and a resistor R2; the live warning module comprises a rectifier bridge pile B2, an energy storage capacitor C3, a high-voltage trigger diode D3, a light-emitting diode D4 and a current-limiting resistor R3;
the first alternating-current end of the rectifier bridge pile B1 is connected with the high-voltage electrified body, and the second alternating-current end of the rectifier bridge pile B2 is connected with the first alternating-current end; the first direct-current end of the rectifier bridge pile B1 and one end of the energy storage capacitor C1 are connected with one end of the high-voltage trigger diode D1, the other end of the high-voltage trigger diode is connected with one end of a primary coil of the transformer T1, and the other end of the primary coil of the transformer T1 and the other end of the energy storage capacitor C1 are connected with a second direct-current end of the rectifier bridge pile B1; one end of a secondary coil of the transformer T1 is connected with the positive electrode of a diode D2, and the negative electrode of the diode D2 and one end of an energy storage capacitor EC2 are connected with the input end of the power management chip; the other end of the secondary coil of the transformer T1, the other end of the energy storage capacitor EC2 and the ground end of the power management chip are all grounded; the output end of the power management chip is connected with the main control module; one end of the resistor R1 is connected with a first threshold adjusting end of the power management chip; one end of the resistor R2 is connected with a second threshold adjusting end of the power management chip; the other end of the resistor R1 and the other end of the resistor R2 are grounded;
the second alternating-current end of the rectifier bridge pile B2 is connected with a PCB copper foil, and the first direct-current end of the rectifier bridge pile B2 and one end of the energy storage capacitor C3 are both connected with one end of the high-voltage trigger diode D3; the other end of the high-voltage trigger diode D3 is connected with the anode of the light-emitting diode D4 through a resistor R3; the negative electrode of the light-emitting diode D4 and the other end of the energy storage capacitor C3 are connected with the second direct current end of the rectifier bridge pile B2.
Compared with the prior art, the invention has the beneficial effects that:
the invention can improve the electric field induction electricity taking efficiency, thereby reducing the volume of the sensor system and simplifying the installation and the debugging of the sensor.
Drawings
FIG. 1 is a block diagram of a composite sensor system based on electric field induction according to the present invention;
fig. 2 is a circuit configuration diagram of the electric field sensing module, the system energy storage module and the live warning module according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and detailed description below:
referring to fig. 1, the invention provides a composite sensor system based on electric field induction, which can be applied to a switch cabinet contact, a busbar connection position, an electric contact of a power transmission line and the like. The system comprises an electric field induction module, an electrified warning module, a system energy storage module, a main control module, a wireless transceiver module and a temperature measurement module; the live warning module and the system energy storage module are connected with the electric field induction module, the live warning module and the main control module are connected with the system energy storage module, and the wireless transceiver module and the temperature measurement module are connected with the main control module.
The electric field induction module is used for acquiring induction voltage and outputting the induction voltage to the electrified warning module and the system energy storage module; the electric field induction module can obtain induction voltage by using the displacement current of capacitive coupling.
The electrification warning module is used for carrying out luminous indication when the induction voltage is higher than a preset value; when the voltage is higher than the preset value, the voltage is in a high-voltage state, the electrified state of the high-voltage equipment can be indicated, and illegal electrified operation of operators can be prevented.
The system energy storage module is used for storing the induced voltage to form an energy storage voltage, and controlling the main control module to be started or closed when the energy storage voltage reaches a preset value; the temperature measurement module is used for detecting a temperature signal and sending a temperature value to the main control module.
The composite sensor system further comprises a current measurement module connected with the main control module, wherein the current measurement module is used for detecting electromagnetic strength signals and sending current values to the main control module. The effect of multi-parameter on-line monitoring is achieved through the current measurement module and the temperature measurement module, temperature can be measured, load current can be measured, the main control module can judge whether the abnormality of the power equipment is caused by temperature rise or line load increase according to the current value and the temperature value, and accuracy and reliability of a follow-up diagnosis system are improved.
The temperature measurement module comprises a temperature sensing element and a signal processing module, wherein the temperature sensing element, the signal processing module and the main control module are sequentially connected, the temperature sensing element is used for detecting a temperature signal and sending the temperature signal to the signal processing module, the signal processing module is used for filtering the temperature signal and processing the temperature signal to obtain a temperature value, the temperature value is sent to the main control module, and the main control module sends the temperature value to an external receiving device through the wireless transceiver module.
The current measurement module comprises a magnetic resistance element and a TRMS module, the magnetic resistance element, the TRMS module and the main control module are sequentially connected, the magnetic resistance element is used for detecting electromagnetic field intensity signals and sending the electromagnetic field intensity signals to the TRMS module, the TRMS module is used for processing the electromagnetic field intensity signals to obtain current values, and the current values are sent to the main control module. TRMS is True Root Mean Square, which is a true effective value conversion that converts an electromagnetic field strength signal into a true effective value, and calculates a current value based on the magnetic effect of the current.
The main control module sends information to an external corresponding receiving device through the wireless receiving and transmitting module.
Specifically, referring to fig. 2, the electric field induction module includes a high-voltage charged body and a PCB copper foil, and the system energy storage module includes a rectifier bridge stack B1, an energy storage capacitor C1, an energy storage capacitor EC2, a high-voltage trigger diode D1, a diode D2, a transformer T1, a power management chip U1, a resistor R1 and a resistor R2; the live warning module comprises a rectifier bridge pile B2, an energy storage capacitor C3, a high-voltage trigger diode D3, a light-emitting diode D4 and a current-limiting resistor R3;
the first alternating-current end a of the rectifier bridge pile B1 is connected with a high-voltage electrified body, and the second alternating-current end B is connected with the first alternating-current end e of the rectifier bridge pile B2; the first direct current end C of the rectifier bridge pile B1 and one end of the energy storage capacitor C1 are connected with one end of a high-voltage trigger diode, the other end of the high-voltage trigger diode D1 is connected with one end of a primary coil of the transformer T1, and the other end of the primary coil of the transformer T1 and the other end of the energy storage capacitor C1 are connected with a second direct current end D of the rectifier bridge pile B1; one end of a secondary coil of the transformer T1 is connected with the positive electrode of a diode D2, and the negative electrode of the diode D2 and one end of an energy storage capacitor EC2 are connected with the input end vin of the power management chip U1; the other end of the secondary coil of the transformer T1, the other end of the energy storage capacitor EC2 and the ground end gnd of the power management chip U1 are all grounded; the output end vout of the power management chip U1 is connected with the main control module; one end of the resistor R1 is connected with a first threshold adjusting end vh of the power management chip U1; one end of the resistor R2 is connected with a second threshold adjusting end vl of the power management chip U1; the other end of the resistor R1 and the other end of the resistor R2 are grounded;
the second alternating-current end f of the rectifier bridge pile B2 is connected with a PCB copper foil, and the first direct-current end g of the rectifier bridge pile B2 and one end of the energy storage capacitor C3 are both connected with one end of the high-voltage trigger diode D3; the other end of the high-voltage trigger diode D3 is connected with the anode of the light-emitting diode D4 through a resistor R3; the negative electrode of the light-emitting diode D4 and the other end of the energy storage capacitor C3 are connected with the second direct current end h of the rectifier bridge pile B2.
The electricity taking principle of the electric field induction module is that the induction voltage is obtained by pulse position energy of a capacitor through space displacement current of capacitance effect between a high-voltage charged body and a PCB copper foil. The induced voltage carries out primary energy storage on the energy storage capacitor C1 through the rectifier bridge pile B1, when the energy storage voltage in the energy storage capacitor C1 reaches the conducting voltage of the high-voltage trigger diode D1, the voltage in the energy storage capacitor C1 realizes impedance transformation through a transformer, the induced current output capacity of the electric field induction module is improved, and the induced pulse periodically carries out secondary energy storage on the energy storage capacitor EC 2. When the energy storage voltage of the energy storage capacitor EC2 is higher than the first threshold value of the power management chip U1, the output end of the power management chip U1 is used for providing energy for the subsequent circuit, and the energy output is closed until the energy storage voltage of the energy storage capacitor EC2 is lower than the second threshold value of the power management chip, namely the output end of the power management chip U1 is not used for providing energy for the subsequent circuit. The first threshold is regulated by resistor R1 and the second threshold is regulated by resistor R2.
The induced voltage stores energy to the energy storage capacitor C3 through the rectifier bridge pile B2, when the energy storage voltage of the energy storage capacitor C3 reaches the conducting voltage of the high-voltage trigger diode D3, the LED D4 is driven to emit light, and when the energy storage voltage is lower than the cut-off voltage of the high-voltage trigger diode D3, the LED D4 is extinguished. Thus, when the high-voltage charged body is charged, the light emitting diode D4 is in a blinking state, and high-voltage charging warning is performed. While a higher flicker frequency indicates a higher voltage level.
The electric field induction power taking part benefits the on-off characteristic of the high-voltage trigger diode element, realizes impedance transformation by matching with the transformer, transforms tiny current at a high voltage end into larger current at a low voltage end to charge the energy storage capacitor, realizes high-efficiency energy accumulation, has small element volume and small size, and is suitable for voltage level width.
It will be apparent to those skilled in the art from this disclosure that various other changes and modifications can be made which are within the scope of the invention as defined in the appended claims.
Claims (3)
1. The composite sensor system based on the electric field induction is characterized by comprising an electric field induction module, an electrified warning module, a system energy storage module, a main control module, a wireless transceiver module and a temperature measurement module; the system comprises an electric field sensing module, a live warning module, a main control module, a wireless transceiver module, a temperature measuring module and a wireless sensor module, wherein the live warning module and the system energy storage module are connected with the electric field sensing module; the electric field induction module is used for acquiring induction voltage and outputting the induction voltage to the electrified warning module and the system energy storage module; the electrification warning module is used for carrying out luminous indication when the induction voltage is higher than a preset value; the system energy storage module is used for storing the induced voltage to form an energy storage voltage, and controlling the main control module to be started or closed when the energy storage voltage reaches a preset value; the temperature measurement module is used for detecting a temperature signal and sending a temperature value to the main control module, and the main control module sends the temperature value to an external receiving device through the wireless receiving and transmitting module;
the electric field induction module comprises a high-voltage charged body and a PCB copper foil, and the system energy storage module comprises a rectifier bridge pile B1, an energy storage capacitor C1, an energy storage capacitor EC2, a high-voltage trigger diode D1, a diode D2, a transformer T1, a power management chip, a resistor R1 and a resistor R2; the live warning module comprises a rectifier bridge pile B2, an energy storage capacitor C3, a high-voltage trigger diode D3, a light-emitting diode D4 and a current-limiting resistor R3;
the first alternating-current end of the rectifier bridge pile B1 is connected with the high-voltage electrified body, and the second alternating-current end of the rectifier bridge pile B2 is connected with the first alternating-current end; the first direct-current end of the rectifier bridge pile B1 and one end of the energy storage capacitor C1 are connected with one end of a high-voltage trigger diode, the other end of the high-voltage trigger diode D1 is connected with one end of a primary coil of the transformer T1, and the other end of the primary coil of the transformer T1 and the other end of the energy storage capacitor C1 are connected with a second direct-current end of the rectifier bridge pile B1; one end of a secondary coil of the transformer T1 is connected with the positive electrode of a diode D2, and the negative electrode of the diode D2 and one end of an energy storage capacitor EC2 are connected with the input end of the power management chip; the other end of the secondary coil of the transformer T1, the other end of the energy storage capacitor EC2 and the ground end of the power management chip are all grounded; the output end of the power management chip is connected with the main control module; one end of the resistor R1 is connected with a first threshold adjusting end of the power management chip; one end of the resistor R2 is connected with a second threshold adjusting end of the power management chip; the other end of the resistor R1 and the other end of the resistor R2 are grounded;
the second alternating-current end of the rectifier bridge pile B2 is connected with a PCB copper foil, and the first direct-current end of the rectifier bridge pile B2 and one end of the energy storage capacitor C3 are both connected with one end of the high-voltage trigger diode D3; the other end of the high-voltage trigger diode D3 is connected with the anode of the light-emitting diode D4 through a resistor R3; the negative electrode of the light-emitting diode D4 and the other end of the energy storage capacitor C3 are connected with the second direct-current end of the rectifier bridge pile B2;
the composite sensor system further comprises a current measurement module connected with the main control module, wherein the current measurement module is used for detecting electromagnetic strength signals and sending current values to the main control module.
2. The electric field induction based composite sensor system according to claim 1, wherein the temperature measuring module comprises a temperature sensing element and a signal processing module, the temperature sensing element, the signal processing module and the main control module are sequentially connected, the temperature sensing element is used for detecting a temperature signal and sending the temperature signal to the signal processing module, and the signal processing module is used for filtering the temperature signal and processing the temperature signal to obtain a temperature value and sending the temperature value to the main control module.
3. The electric field induction based composite sensor system according to claim 1, wherein the current measurement module comprises a magneto-resistive element and a TRMS module, the magneto-resistive element, the TRMS module and the main control module are sequentially connected, the magneto-resistive element is used for detecting an electromagnetic field intensity signal and transmitting the electromagnetic field intensity signal to the TRMS module, and the TRMS module is used for processing the electromagnetic field intensity signal to obtain a current value and transmitting the current value to the main control module.
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| CN201610279259.3A CN107328488B (en) | 2016-04-28 | 2016-04-28 | Composite sensor system based on electric field induction |
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| CN109444653A (en) * | 2018-11-06 | 2019-03-08 | 珠海多监测科技有限公司 | Passive compound sensor |
| CN110191542B (en) * | 2019-06-22 | 2021-07-20 | 安徽华新光电饰业有限公司 | Temperature protector of LED lamp and mounting process thereof |
| CN111257618A (en) * | 2020-01-21 | 2020-06-09 | 国网江苏省电力有限公司电力科学研究院 | Cubical switchboard contact current measurement ring with from function of getting electricity |
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| CN102542726B (en) * | 2012-02-08 | 2013-07-31 | 山东电科四维电气股份有限公司 | In-situ electrified safe audible and visible alarming device |
| CN103017913A (en) * | 2012-09-19 | 2013-04-03 | 珠海一多监测科技有限公司 | Double-power sensor device mainly powered by means of self energy collection |
| CN202869683U (en) * | 2012-10-25 | 2013-04-10 | 宁夏电力公司银川供电局 | Self-powered high-voltage insulating switch contact temperature on-line measuring device with cylindrical electric field sensor board |
| CN105071653A (en) * | 2015-02-11 | 2015-11-18 | 杜金昌 | High-efficiency electric field induction electricity taking device |
| CN104748870A (en) * | 2015-04-02 | 2015-07-01 | 杨志强 | Passive wireless temperature current sensor |
| CN205593673U (en) * | 2016-04-28 | 2016-09-21 | 杨志强 | Compound sensor system based on electric field induction formula |
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