CN107063496A - A kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit - Google Patents
A kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit Download PDFInfo
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- CN107063496A CN107063496A CN201710326364.2A CN201710326364A CN107063496A CN 107063496 A CN107063496 A CN 107063496A CN 201710326364 A CN201710326364 A CN 201710326364A CN 107063496 A CN107063496 A CN 107063496A
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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
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
- G01K7/20—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer in a specially-adapted circuit, e.g. bridge circuit
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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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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention belongs to automotive brake Temperature monitoring technology field, it is related to a kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit, temperature signal is changed into through PT1000 platinum resistance sensors becomes corresponding resistance value, the magnitude of voltage that resistance value is changed between the output end of corresponding first divider resistance and the output end of the second divider resistance is output to differential amplification sub-circuit by measuring bridge, voltage signal of the magnitude of voltage of measuring bridge output after differential amplification sub-circuit amplification is amplified, voltage signal after amplification is converted to data signal by analog-to-digital conversion sub-circuit, radio transmitter launches the data signal after conversion to the receiving terminal of driver's cabin, temperature detection is carried out to many shaft end brake temperatures in real time, the single working time of single-chip microcomputer and wireless transmission chip is limited in a millisecond rank, and switch work and the resting state of wireless module according to temperature threshold, reduce circuit power consumption, to realize that the small size battery self-powered of circuit provides possibility.
Description
Technical field：
The invention belongs to automotive brake Temperature monitoring technology field, it is related to a kind of low-power consumption multichannel brake temperature signal
Radio detection and radiating circuit.
Background technology：
Automobile is turned or suddenly risen under the operating modes such as jerk in long and steep downgrade, and brake needs to carry out for a long time the system of intensity greatly
Dynamic, brake temperature is easily quickly raised, and causes the frictional decrease of brake strip, and braking moment declines therewith, and this is just
It is the character of heat-fading of brake.The appropriate working temperature of brake strip is 100-350 DEG C, and many brake strips inferior are in temperature
Degree is when reaching 250 DEG C, and its coefficient of friction will drastically decline, and now brake will failure completely.Therefore to brake temperature
It is monitored, and then early warning is carried out to the condition of high temperature, to ensures the braking safety of lorry and the braking of auxiliary driver
Behavior, there is very great meaning.
Brake temperature is too high to will result directly in pressure of tire rise and temperature rise, accident of blowing out, vehicle of being expert at
Blowing out often makes driver lose the control to vehicle to trigger the vehicle of being expert on pernicious traffic accident, especially highway
Once blowing out, generally trigger severe traffic accidents., it is necessary to gather 6 shaft end systems simultaneously by taking the end semitrailer of three axle six as an example
Dynamic device temperature, traditional single point temperature measuring circuit is difficult to meet needs, it is contemplated that 6 shaft end brake locus distributed areas
Greatly, brake temperature signal is transferred to the processing and display that data are carried out in driver's cabin, wire harness using traditional wired mode
Length is long, and cost is high, and wiring complexity is high；And because lorry battery is typically located at cab bottom, cause to be arranged on
Brake temperature detection circuit on vehicle frame faces the problem of track lengths are long in power taking, furthermore lorry battery tension is logical
Often it is 24V, voltage is generally in 27-28V during driving, and detects that circuit is powered usually using 5V power supplys, if from vehicle power power taking,
Need to carry out decompression and Voltage stabilizing module design, increase circuit cost.
The content of the invention：
It is an object of the invention to overcome the shortcoming that prior art is present, seek design and a kind of low-power consumption multichannel braking is provided
Many shaft end brake temperatures are carried out temperature detection in real time, possess wireless signal by device temperature signal radio detection and radiating circuit
Emissivities, can realize small size battery self-powered (battery is powered up to more than 1 year), complete circuit low power dissipation design.
To achieve these goals, low-power consumption multichannel brake temperature signal radio detection of the present invention and radiating circuit
Including measuring bridge, differential amplification sub-circuit, analog-to-digital conversion sub-circuit and wireless transmission sub-circuit, wherein measuring bridge includes field
Effect pipe, the first divider resistance, the second divider resistance, reference resistance and PT1000 platinum resistance sensors, FET
Drain electrode input 5V supply voltages, the first I/O interfaces of the STM32F103C8T6 single-chip microcomputers of wireless transmission sub-circuit pass through drop-down
Resistance connects the grid of FET, the source electrode of FET respectively with the first divider resistance and the input phase of second voltage
Even, the output end of the first divider resistance respectively with the positive pole and differential amplification sub-circuit of PT1000 platinum resistance sensors
The input of first resistor is connected, the output end of divider resistance respectively with the input and differential amplification sub-circuit of reference resistance
The input of second resistance is connected, and the negative pole of PT1000 platinum resistance sensors is connected with the output end of reference resistance,
PT1000 platinum resistance sensors it is ground wire grounded；Differential amplification sub-circuit is by integrated operational amplifier, first resistor, the
Two resistance, 3rd resistor and the 4th resistance composition, the positive polarity of the output end of first resistor respectively with integrated operational amplifier
Input port is connected with the input of 3rd resistor, and the voltage negative pole of the output end of second resistance respectively with integrated operational amplifier is defeated
The input of entrance and the 4th resistance is connected, and the output head grounding of 3rd resistor, the output end of the 4th resistance is put with integrated computation
The voltage output of big device is connected；Analog-to-digital conversion sub-circuit by modulus conversion chip, the first pull-up resistor, the second pull-up resistor and
Filter capacitor is constituted, the first voltage output pin and second voltage output pin of integrated operational amplifier respectively with analog-to-digital conversion
First voltage input pin and second voltage the output pin connection of chip, the first data output of modulus conversion chip and the
Two data outputs connect with the 2nd I/O interfaces and the 3rd I/O of STM32F103C8T6 single-chip microcomputers in wireless transmission sub-circuit respectively
Mouth connection, the first clock signal delivery outlet and second clock signal output of modulus conversion chip are connected respectively
4th I/O interfaces of STM32F103C8T6 single-chip microcomputers and the 5th I/O interfaces；Wireless transmission sub-circuit is mono- by STM32F103C8T6
Piece machine, E31-TTL-50 wireless transmissions chip, the 3rd pull-up resistor and diode composition, the of STM32F103C8T6 single-chip microcomputers
Six I/O interfaces connect the data-out pin of E31-TTL-50 wireless transmission chips, the 7th I/ of STM32F103C8T6 single-chip microcomputers
O Interface is connected goes here and there in the middle of the data output pins of E31-TTL-50 wireless transmission chips, the 7th I/O interfaces and data output pins
Diode is connect, the 8th I/O interfaces of STM32F103C8T6 single-chip microcomputers connect the mould of wireless transmitter module by the 3rd pull-up resistor
Formula sets pin.
PT1000 platinum resistance sensors of the present invention are at 0 degree Celsius, and resistance is 1000 Europe, equal to reference to electricity
The resistance of resistance, now measuring bridge is in poised state, the output end of the first divider resistance of measuring bridge and the second partial pressure electricity
Electrical potential difference between the output end of resistance is 0, and when temperature is more than 0 degree Celsius, PT1000 platinum resistance sensor resistances are big
In the resistance of reference resistance, the output end of the output end of the first divider resistance and the second divider resistance produces electricity corresponding with resistance
Potential difference, FET controls the switch of measuring bridge, scene effect pipe drain electrode input 5V supply voltages, when fet gate is put
During low level, FET source electrode Non voltage output, when fet gate puts high level, FET source electrode has 2.7V electricity
Pressure output.
First resistor of the present invention is identical with the resistance of second resistance, and 3rd resistor is identical with the resistance of the 4th resistance.
When E31-TTL-50 wireless transmissions chip of the present invention is below 150 degree of temperature signal, in park mode,
At more than 150 degree, in mode of operation；The STM32F103C8T6 single-chip microcomputers working time per second is 20ms, at the remaining time
In park mode, the working time that E31-TTL-50 wireless transmission chips are launched every time is 8~12ms, and remaining time is in dormancy
Pattern；When STM32F103C8T6 single-chip microcomputers are in mode of operation, the first I/O interfaces of STM32F103C8T6 single-chip microcomputers put high electricity
Flat, the grid of FET is in high level state, and FET conducting, measuring bridge is powered；STM32F103C8T6 single-chip microcomputers
When being in park mode, the first I/O interfaces of STM32F103C8T6 single-chip microcomputers set low level, and the grid of FET is in
Low level state, FET cut-off, measuring bridge power-off.
The present invention operation principle be：Temperature signal is changed into through PT1000 platinum resistance sensors becomes corresponding
Resistance value, measuring bridge by resistance value be changed into corresponding first divider resistance output end and the second divider resistance output end it
Between magnitude of voltage be output to differential amplification sub-circuit, the magnitude of voltage of measuring bridge output is obtained by differential amplification sub-circuit amplification
Voltage signal after amplification, because resistance meets R4=R5,R6=R7Relation, output voltage is reduced to
Wherein, uBFor the magnitude of voltage of the second divider resistance output end, uAFor the magnitude of voltage of the first divider resistance output end；Mould
Voltage signal after amplification is converted to data signal by number conversion sub-circuits, radio transmitter by the data signal after conversion to
The receiving terminal transmitting of driver's cabin, realizes temperature detection.
The present invention compared with prior art, can carry out temperature detection to many shaft end brake temperatures in real time, possess wireless communication
Number emissivities, realize that the I/O mouths of single-chip microcomputer put low and high level control measuring bridge using FET MOSFET-SI2302
On/off, a millisecond rank is limited in by the single working time of single-chip microcomputer and wireless transmission chip, and and according to temperature threshold
Switch work and the resting state of wireless module, significantly reduce circuit power consumption, to realize that the small size battery of circuit is confessed
Electricity is provided may.
Brief description of the drawings：
Fig. 1 is agent structure schematic block diagram of the invention；
Fig. 2 is measuring bridge of the present invention and differential amplification sub-circuit figure.
Fig. 3 is analog-to-digital conversion sub-circuit figure of the present invention.
Fig. 4 is wireless transmission sub-circuit figure of the present invention.
Embodiment：
Below by embodiment and the invention will be further described with reference to accompanying drawing.
Embodiment：
The present embodiment uses low-power consumption multichannel brake temperature signal radio detection and radiating circuit, with the end lorry of three axle 6
Exemplified by, 6 road brake temperature signals are detected altogether, there is identical structure per road measuring bridge, by wherein all the way exemplified by illustrate,
The low-power consumption multichannel brake temperature signal radio detection and radiating circuit include measuring bridge, differential amplification sub-circuit, mould
Number conversion sub-circuit and wireless transmission sub-circuit, wherein measuring bridge include FET SI2302, the first divider resistance R1,
Two divider resistance R2, reference resistance R3With PT1000 platinum resistance sensors, the drain D pole input 5V power supplys of FET
Voltage, the first I/O interfaces PA1 of the STM32F103C8T6 single-chip microcomputers of wireless transmission sub-circuit passes through pull down resistor R11Connect field
Effect pipe SI2302 grid G pole, FET SI2302 source S pole respectively with the first divider resistance R1With second voltage R2
Input be connected, the first divider resistance R1Output end respectively with the positive pole of PT1000 platinum resistance sensors and differential
Amplify first resistor R in sub-circuit4Input be connected, divider resistance R2Output end respectively with reference resistance R3Input
With second resistance R in differential amplification sub-circuit5Input be connected, the negative pole of PT1000 platinum resistance sensors and reference
Resistance R3Output end be connected, PT1000 platinum resistance sensors it is ground wire grounded；Differential amplification sub-circuit is by integrated fortune
Calculate amplifier LM2904, first resistor R4, second resistance R5, 3rd resistor R6With the 4th resistance R7Composition, first resistor R4It is defeated
Go out to hold positive polarity input port and 3rd resistor R respectively with integrated operational amplifier LM29046Input be connected, second electricity
Hinder R5Output end voltage negative pole input port respectively with integrated operational amplifier LM2904 and the 4th resistance R7Input phase
Even, 3rd resistor R6Output head grounding, the 4th resistance R7Output end and integrated operational amplifier LM2904 voltage output
It is connected；Analog-to-digital conversion sub-circuit is by modulus conversion chip ads1115, the first pull-up resistor R8, the second pull-up resistor R9And filtered electrical
Hold C1Composition, integrated operational amplifier LM2904 first voltage output pin out1 and second voltage output pin out2 difference
It is connected with modulus conversion chip ads1115 first voltage input pin AIN0 and second voltage output pin AIN1, modulus turns
Change chip ads1115 the first data output SDA1 and the second data output SDA2 respectively with wireless transmission sub-circuit
2nd I/O interfaces PB6 of STM32F103C8T6 single-chip microcomputers and the 3rd I/O interfaces PB8 connections, modulus conversion chip ads1115's
First clock signal delivery outlet SCL1 and second clock signal output SCL2 connect the of STM32F103C8T6 single-chip microcomputers respectively
Four I/O interfaces PB5 and the 5th I/O interfaces PB7；Wireless transmission sub-circuit by STM32F103C8T6 single-chip microcomputers, E31-TTL-50 without
Line transmitting chip, the 3rd pull-up resistor R10With diode IN4001 compositions, the 6th I/O interfaces of STM32F103C8T6 single-chip microcomputers
7th I/O of data-out pin RX, the STM32F103C8T6 single-chip microcomputer of PA9 connection E31-TTL-50 wireless transmission chips connects
The data output pins TX, the 7th I/O interfaces PA0 and data output pins of mouth PA0 connection E31-TTL-50 wireless transmission chips
The 8th I/O interfaces PB0 of series diode IN4001, STM32F103C8T6 single-chip microcomputer passes through the 3rd pull-up resistor R in the middle of TX10
The pattern for connecting wireless transmitter module sets pin M1.
PT1000 platinum resistance sensors of the present invention are at 0 degree Celsius, and resistance is 1000 Europe, equal to reference to electricity
Hinder R3Resistance, now measuring bridge be in poised state, the first divider resistance R of measuring bridge1Output end (i.e. A in Fig. 2
Point) and the second divider resistance R2Electrical potential difference between the output end of (i.e. B points in Fig. 2) is 0, when temperature is more than 0 degree Celsius,
PT1000 platinum resistance sensors resistance is more than reference resistance R3Resistance, A, 2 points of B produces potential corresponding with resistance
Difference, FET SI2302 controls the switch of measuring bridge, 5V supply voltages is inputted in drain D pole, when grid G pole sets low level
When, source S pole Non voltage output, when high level is put in grid G pole, there are 2.7V voltage outputs source S pole.
First resistor R described in the present embodiment4With second resistance R5Resistance it is identical, 3rd resistor R6With the 4th resistance R7's
Resistance is identical.
The present embodiment invention is described when E31-TTL-50 wireless transmissions chip is below 150 degree of temperature signal, in stopping
Sleep mode, at more than 150 degree, in mode of operation.The STM32F103C8T6 single-chip microcomputers working time per second is 20ms, remaining
Time be in the minimum park mode of power consumption, the working time that wireless transmitter module is launched every time is 8~12ms, when remaining
Between be in park mode；When STM32F103C8T6 single-chip microcomputers are in mode of operation, the first I/O of STM32F103C8T6 single-chip microcomputers
Interface PA1 puts high level, and FET SI2302 grid G pole is in high level state, FET SI2302 conductings, measurement
Electric bridge is powered；When STM32F103C8T6 single-chip microcomputers are in park mode, the first single-chip processor i/o interface PA1 sets low level, field effect
Should pipe SI2302 grid G pole be in low level state, FET SI2302 cut-off, measuring bridge power-off.
The operation principle of the present embodiment is：Temperature signal is changed into through PT1000 platinum resistance sensors becomes correspondence
Resistance value, the magnitude of voltage that resistance value is changed into corresponding A and B point-to-point transmissions is output to differential amplification sub-circuit by measuring bridge, surveys
Voltage signal of the magnitude of voltage of amount electric bridge output after differential amplification sub-circuit amplification is amplified, because resistance meets R4=
R5,R6=R7Relation, output voltage is reduced to
Take R7=100K Ω, R5=10K Ω, the multiplication factor for being amplified circuit is 10 times, and analog-to-digital conversion sub-circuit will be put
Voltage signal after big is converted to data signal, and radio transmitter sends out the data signal after conversion to the receiving terminal of driver's cabin
Penetrate, realize temperature detection.
Claims (5)
1. a kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit, it is characterised in that including measuring bridge,
Differential amplification sub-circuit, analog-to-digital conversion sub-circuit and wireless transmission sub-circuit, wherein measuring bridge include FET, first point
Piezoresistance, the second divider resistance, reference resistance and PT1000 platinum resistance sensors, the drain electrode input 5V electricity of FET
Source voltage, the first I/O interfaces of the STM32F103C8T6 single-chip microcomputers of wireless transmission sub-circuit connect field-effect by pull down resistor
The grid of pipe, the input of the source electrode of FET respectively with the first divider resistance and second voltage is connected, the first divider resistance
Output end input respectively with first resistor in the positive pole and differential amplification sub-circuit of PT1000 platinum resistance sensors
End is connected, the input of the output end of divider resistance respectively with second resistance in the input and differential amplification sub-circuit of reference resistance
End is connected, and the negative pole of PT1000 platinum resistance sensors is connected with the output end of reference resistance, PT1000 platinum resistance thermometer sensor, temperature
Spend the ground wire grounded of sensor；Differential amplification sub-circuit is by integrated operational amplifier, first resistor, second resistance, 3rd resistor
With the 4th resistance composition, the output end of first resistor respectively with the positive polarity input port of integrated operational amplifier and 3rd resistor
Input be connected, the output end of second resistance respectively with the voltage negative pole input port of integrated operational amplifier and the 4th resistance
Input is connected, the output head grounding of 3rd resistor, the output end of the 4th resistance and the voltage output of integrated operational amplifier
It is connected；Analog-to-digital conversion sub-circuit is made up of modulus conversion chip, the first pull-up resistor, the second pull-up resistor and filter capacitor, collection
Into first voltage output pin and second voltage the output pin first voltage respectively with modulus conversion chip of operational amplifier
Input pin and the connection of second voltage output pin, the first data output and the second data output point of modulus conversion chip
It is not connected with the 2nd I/O interfaces and the 3rd I/O interfaces of STM32F103C8T6 single-chip microcomputers in wireless transmission sub-circuit, modulus turns
The the first clock signal delivery outlet and second clock signal output for changing chip connect the of STM32F103C8T6 single-chip microcomputers respectively
Four I/O interfaces and the 5th I/O interfaces；Wireless transmission sub-circuit is by STM32F103C8T6 single-chip microcomputers, E31-TTL-50 wireless transmissions
Chip, the 3rd pull-up resistor and diode composition, the 6th I/O interfaces connection E31-TTL-50 of STM32F103C8T6 single-chip microcomputers
The data-out pin of wireless transmission chip, the 7th I/O interfaces connection E31-TTL-50 of STM32F103C8T6 single-chip microcomputers is wireless
Series diode in the middle of the data output pins of transmitting chip, the 7th I/O interfaces and data output pins, STM32F103C8T6
The pattern that 8th I/O interfaces of single-chip microcomputer connect wireless transmitter module by the 3rd pull-up resistor sets pin.
2. low-power consumption multichannel brake temperature signal radio detection and radiating circuit according to claim 1, it is characterised in that
The PT1000 platinum resistance sensors are at 0 degree Celsius, and resistance is 1000 Europe, equal to the resistance of reference resistance, now
Measuring bridge is in poised state, between the output end of the first divider resistance of measuring bridge and the output end of the second divider resistance
Electrical potential difference be 0, when temperature be more than 0 degree Celsius when, PT1000 platinum resistance sensors resistance be more than reference resistance resistance
The output end of value, the output end of the first divider resistance and the second divider resistance produces electrical potential difference corresponding with resistance, FET
The switch of measuring bridge is controlled, the drain electrode of scene effect pipe inputs 5V supply voltages, when fet gate sets low level, field effect
Should pipe source electrode Non voltage output, when fet gate puts high level, FET source electrode has 2.7V voltage outputs.
3. low-power consumption multichannel brake temperature signal radio detection and radiating circuit according to claim 1, it is characterised in that
The first resistor is identical with the resistance of second resistance, and 3rd resistor is identical with the resistance of the 4th resistance.
4. low-power consumption multichannel brake temperature signal radio detection and radiating circuit according to claim 1, it is characterised in that
When the E31-TTL-50 wireless transmissions chip is below 150 degree of temperature signal, when more than park mode, 150 degree, it is in
Mode of operation；The STM32F103C8T6 single-chip microcomputers working time per second is 20ms, and the remaining time is in park mode, E31-
The working time that TTL-50 wireless transmission chips are launched every time is 8~12ms, and remaining time is in park mode；
When STM32F103C8T6 single-chip microcomputers are in mode of operation, the first I/O interfaces of STM32F103C8T6 single-chip microcomputers put high level, field
The grid of effect pipe is in high level state, and FET conducting, measuring bridge is powered；STM32F103C8T6 single-chip microcomputers are in
During park mode, the first I/O interfaces of STM32F103C8T6 single-chip microcomputers set low level, and the grid of FET is in low electricity
Level state, FET cut-off, measuring bridge power-off.
5. low-power consumption multichannel brake temperature signal radio detection and radiating circuit according to claim 1, it is characterised in that
The operation principle of the circuit is：Temperature signal is changed into through PT1000 platinum resistance sensors becomes corresponding resistance value,
Resistance value is changed into the electricity between the output end of corresponding first divider resistance and the output end of the second divider resistance by measuring bridge
Pressure value is output to differential amplification sub-circuit, and the magnitude of voltage of measuring bridge output is after differential amplification sub-circuit amplification is amplified
Voltage signal, because resistance meets R4=R5,R6=R7Relation, output voltage is reduced to
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Wherein, uBFor the magnitude of voltage of the second divider resistance output end, uAFor the magnitude of voltage of the first divider resistance output end；Modulus turns
Change sub-circuit and the voltage signal after amplification is converted into data signal, radio transmitter is by the data signal after conversion to driving
The receiving terminal transmitting of room, realizes temperature detection.
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| CN201710326364.2A CN107063496A (en) | 2017-05-10 | 2017-05-10 | A kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit |
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| CN201710326364.2A CN107063496A (en) | 2017-05-10 | 2017-05-10 | A kind of low-power consumption multichannel brake temperature signal radio detection and radiating circuit |
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| CN108593133A (en) * | 2018-05-22 | 2018-09-28 | 青岛海尔空调电子有限公司 | Detection circuit, the method, apparatus of the water temperature of handpiece Water Chilling Units in a kind of detection air-conditioning |
| CN108801847A (en) * | 2018-06-23 | 2018-11-13 | 蚌埠赛英电子科技发展有限公司 | The mating mud density harvester of wireless composite logging |
| CN109140532A (en) * | 2018-09-11 | 2019-01-04 | 南京云睿航天科技有限公司 | A kind of intelligent gas-burning stove circuit of low power consumption multi-channel temperature gated acquisition |
| CN109142870A (en) * | 2018-09-23 | 2019-01-04 | 东南大学 | The method that a kind of pair of Multi-channel hot resistance carries out wireless accurate measurement |
| CN109580024A (en) * | 2018-12-11 | 2019-04-05 | 天津大学 | A kind of low-consumption wireless temperature sensor |
| CN109774697A (en) * | 2019-01-21 | 2019-05-21 | 临沂高新区鸿图电子有限公司 | Vehicle security system and its Wear Temperature sensor |
| CN110567603A (en) * | 2019-09-29 | 2019-12-13 | 杨柳 | Single ADC multichannel temperature monitoring circuit controlled by GPIO |
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| CN109142870A (en) * | 2018-09-23 | 2019-01-04 | 东南大学 | The method that a kind of pair of Multi-channel hot resistance carries out wireless accurate measurement |
| CN109580024A (en) * | 2018-12-11 | 2019-04-05 | 天津大学 | A kind of low-consumption wireless temperature sensor |
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