CN110285890A - A kind of temperature-sensing system under complex electromagnetic environment - Google Patents
A kind of temperature-sensing system under complex electromagnetic environment Download PDFInfo
- Publication number
- CN110285890A CN110285890A CN201910580968.9A CN201910580968A CN110285890A CN 110285890 A CN110285890 A CN 110285890A CN 201910580968 A CN201910580968 A CN 201910580968A CN 110285890 A CN110285890 A CN 110285890A
- Authority
- CN
- China
- Prior art keywords
- resistance
- temperature
- capacitor
- operational amplifier
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/20—Compensating for effects of temperature changes other than those to be measured, e.g. changes in ambient temperature
-
- 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
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
-
- 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
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/021—Particular circuit arrangements
-
- 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
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
- G01K7/10—Arrangements for compensating for auxiliary variables, e.g. length of lead
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2215/00—Details concerning sensor power supply
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
The invention discloses a kind of temperature-sensing systems under complex electromagnetic environment, including high precision electro source unit, temperature detecting unit, electromagnetic interference to resist unit and temperature compensation unit；The high precision electro source unit is carrying out voltage output to remaining element under optimum management mode, the temperature detecting unit carries out the data acquisition of temperature measurement by temperature transducers module under complex electromagnetic environment, the electromagnetic interference, which resists unit, reduces the interference transmitted under complex electromagnetic environment to temperature measurement and signal, the temperature compensation unit carries out temperature-compensating to temperature detecting unit, ensure that the accuracy that temperature measures under complex electromagnetic environment.The present invention realizes the measurement of the temperature under complex electromagnetic environment, still has higher measurement accuracy when ensure that under complex electromagnetic environment by stronger electromagnetic interference.
Description
Technical field
The present invention relates to a kind of temperature measurement technology, especially a kind of temperature-sensing system under complex electromagnetic environment.
Background technique
With the continuous development of commercial production levels, temperature measurement technology is also important in one for being increasingly becoming technical level
Index.Whether the common production in industrial or agricultural or this neck for needing to be precisely controlled temperature of national defence, aerospace
Domain, to measured temperature it is accurate understanding increasingly it is necessary to.
With the further development of industrial measurement technique, conventional temperature measures the reality for being gradually unable to satisfy industrial application
Border demand, the accuracy of conventional temperature test be there is a problem that larger especially in complex electromagnetic environment, while also can
Biggish interference is brought to temperature measurement.
Thermocouple is favored because accuracy is higher always as the important devices in temperature measurement.But in complexity
To in the measurement of temperature under electromagnetic environment, due to the stationarity of device, it is difficult to be done directly the disposable accurate measurement to temperature.
Simultaneously as structure is simple, thermocouple measurement circuit itself or complex electromagnetic environment are tested the strong interference that field generates and very may be used
Large effect can be caused to the measurement process of thermocouple, this can also further result in the accuracy and survey of thermocouple measurement
The confidence level of numerical quantity is not high.
In order to preferably complete the accurate measurement to dynamic temperature, need to carry out into one traditional thermocouple measurement device
The improvement of step, to complete more accurate and complete temperature measurement.
Summary of the invention
Goal of the invention: a kind of temperature-sensing system under complex electromagnetic environment is provided, to solve the above problems.
Technical solution: a kind of temperature-sensing system under complex electromagnetic environment, including the inspection of high precision electro source unit, temperature
Survey unit, electromagnetic interference resists unit and temperature compensation unit；
High precision electro source unit can be mainly divided into power supply output module and energy management module, which is characterized in that for electricity output
Module further includes a kind of high precision electro source circuit, is controlled by electric current of the energy management module to power supply, is entire temperature
The operation of sensor-based system provides the reasonable energy and supports, the energy management module carries out the voltage output of the power supply
The economization effect of maximum likelihood is realized in optimum management；
Temperature detecting unit, including temperature transducer are tested field to complex electromagnetic environment by temperature transducers module and carry out temperature
Measurement, temperature transducers module handles collected temperature detection data, selects thermocouple to make temperature element, so that surveying
Amount range is wide, precision is high, inertia is small and output signal is convenient for teletransmission；
Electromagnetic interference resists unit, including shield shell and a kind of electromagnetic interference resist circuit, connect with temperature transducer, described
Shield shell selects different materials according to varying environment, when the frequency of interference source is lower than 100kHz, using the iron of high permeability
Magnetic material does shield shell, when the frequency of interference source is higher than 100kHz, does shield shell using the material of good conductor, right
Electric field shielding is then used when interference source is voltage, magnetic field shielding is then used when interference source is electric current, guarantees shield effectiveness；
Temperature compensation unit, including temperature-compensation circuit guarantee that the electromagnetic interference resists circuit in certain temperature change model
It works with enclosing interior normal table, and then guarantees the accuracy of the measurement of the temperature under complex electromagnetic environment；
High precision electro source circuit, including transformer TR1, rectifier bridge BR1, integrated regulator U1, operational amplifier U2, resistance
R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, potentiometer RV1, capacitor C1,
Capacitor C2, capacitor C3, capacitor C4, capacitor C5, triode Q1, triode Q2 and reference voltage source D3, the transformer TR1
1 pin connects input voltage signal, and the 2nd pin of the transformer TR1 connects input voltage signal, and the 3rd of the transformer TR1 is drawn
Foot is connect with the 2nd pin of the rectifier bridge BR1, the 4th pin of the transformer TR1 and the 3rd pin of the rectifier bridge BR1
Connection, the 1st pin of the rectifier bridge BR1 and one end of the resistance R1, one end of the capacitor C1, the integrated electricity of the pressure stabilizing
The 2nd pin of road U1, one end of the capacitor C2, one end of the capacitor C3, one end of the capacitor C4, the triode Q2
Emitter, one end of the resistance R9, one end of the resistance R7, one end of the capacitor C5, the potentiometer RV1
3rd pin of 2 pins, the 2nd pin of the reference voltage source D3 and the reference voltage source D3 is grounded, the rectifier bridge
The 4th pin of BR1 respectively with the other end of the resistance R1, the other end of the capacitor C1, the integrated regulator U1
The connection of 1st pin, the 3rd pin of the integrated regulator U1 respectively with the other end of the capacitor C2, the capacitor C3
The other end is connected with the emitter of the triode Q1, and the base stage of the triode Q1 is connect with one end of the resistance R2, institute
The other end for stating resistance R2 is connect with the collector of the triode Q2, and the one of the base stage of the triode Q2 and the resistance R8
One end connection at end, the resistance R9, the other end of the collector of the triode Q1 and the capacitor C4, the resistance R6
3rd pin of one end, one end of the resistance R3 and the reference voltage source D3 connects output voltage signal, the resistance R3's
The other end is connect with the 1st pin of the 1st pin of the reference voltage source D3, the potentiometer RV1 respectively, the potentiometer
The 3rd pin of RV1 is connect with one end of the resistance R4 respectively, and the other end of the resistance R4 is another with the capacitor C5 respectively
The non-inverting input terminal of one end connection of one end, the resistance R5, the other end of the resistance R5 and the operational amplifier U2 connect
It connects, the inverting input terminal of the operational amplifier U2 connects with the other end of the other end of the resistance R6, the resistance R7 respectively
It connects, the output end of the operational amplifier U2 is connect with one end of the resistance R8；
Electromagnetic interference resist circuit, including thermocouple TC1, operational amplifier U3, operational amplifier U4, resistance R10, resistance R11,
Resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, capacitor C6, capacitor C7, capacitor C8 and capacitor C9, the thermoelectricity
The cathode of even TC1 is connect with the inverting input terminal of the operational amplifier U3, anode and the resistance of the thermocouple TC1
One end of R10 connects output voltage signal, and the end CJ of the thermocouple TC1 is connect with one end of the resistance R11, the resistance
The other end of R10 is connect with the non-inverting input terminal of one end of the resistance R12, the operational amplifier U3 respectively, the resistance
The other end of R11 and the other end of the resistance R12 are grounded, and the 1st pin jointing temp of the operational amplifier U3 compensates letter
Number, the 5th pin and one end of the capacitor C6, one end of the capacitor C7 of the operational amplifier U3 connects VCC signal, institute
The other end for stating the other end and the capacitor C7 of capacitor C6 is grounded, the 7th pin and the electricity of the operational amplifier U3
One end of one end, the capacitor C9 for holding C8 connects VCC signal, the other end of the other end of the capacitor C8 and the capacitor C9
It is grounded, the 4th pin of the operational amplifier U3 is connect with one end of the resistance R13, and the 8th of the operational amplifier U3 the
Pin is connect with one end of the resistance R14, the other end of the resistance R13 respectively with the other end of the resistance R14, described
The non-inverting input terminal of operational amplifier U4 connects, the inverting input terminal of the operational amplifier U4 respectively with the operational amplifier
One end connection of the output end of U4, the resistance R16, the other end ground connection of the resistance R16, the of the operational amplifier U3
8 pins are connect with one end of the resistance R15, another termination output temperature signal of the resistance R15；
Temperature-compensation circuit, including operational amplifier U5, operational amplifier U6, resistance R17, resistance R18, resistance R19, resistance
R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29,
Potentiometer RV2, potentiometer RV3, capacitor C10 and capacitor C11, the non-inverting input terminal of the operational amplifier U5 respectively with the electricity
Hinder one end connection of one end of R17, one end of the resistance R18, the capacitor C10, another termination VCC of the resistance R17
Signal, the other end of the resistance R18 and the other end of the capacitor C10, one end of the capacitor C11, the resistance R25
One end of one end, one end of the resistance R27 and the resistance R29 is grounded, the inverting input terminal of the operational amplifier U5
It is connect respectively with one end of the output end of the operational amplifier U5, one end of the resistance R19 and the resistance R21, it is described
The other end of resistance R19 is connect with one end of the resistance R20, and the other end of the resistance R20 is respectively with the capacitor C11's
One end connection of the other end, the resistance R23, the other end of the resistance R21 is connect with one end of the resistance R22, described
The other end of resistance R22 the 3rd pin and the resistance with the 1st pin of the potentiometer RV2, the potentiometer RV2 respectively
One end of R24 connects, and the 2nd pin of the potentiometer RV2 is connect with the other end of the resistance R25, and the resistance R23's is another
One end is connect with the inverting input terminal of one end of the resistance R26, the operational amplifier U6 respectively, and the resistance R24's is another
One end is connect with the non-inverting input terminal of the other end of the resistance R27, the operational amplifier U6 respectively, the resistance R26's
The other end is connect with one end of the output end of the operational amplifier U6, the resistance R28 respectively, and the resistance R28's is another
End is connect with the 1st pin of the potentiometer RV3, and the 2nd pin of the potentiometer RV3 draws with the 3rd of the potentiometer RV3
The equal jointing temp thermal compensation signal of the other end of foot, the resistance R29.
According to an aspect of the present invention, the integrated regulator U1 model 7818, plays the work of prime pressure stabilizing
With the input and output side of the integrated regulator U1 is respectively connected to the capacitor C1, the capacitor C2, to obtain ripple very
Small DC voltage, while the also lesser capacitor C3 of access capacity, improve load respond very much in wink simultaneously suppression device itself because
The high-frequency self-excitation that external circuit causes.
According to an aspect of the present invention, the reference voltage source D3 is accurate reference voltage LM399, and the operation is put
The model LM741, the reference voltage source D3 of big device U2 provides reference voltage for the operational amplifier U2.
According to an aspect of the present invention, it is continuous real-time to be tested field progress to complex electromagnetic environment by the thermocouple TC1
Temperature measurement, and measurement data is passed into the operational amplifier U3, by believing with the temperature-compensating on temperature-compensation circuit
It number is modified, guarantees comprehensive measurement to the temperature under complex electromagnetic environment.
According to an aspect of the present invention, the model AD8429 of the operational amplifier U3 forms signal amplification circuit,
Amplify temperature detection signal.
According to an aspect of the present invention, the model AD5488 of the operational amplifier U4, composition inhibit electromagnetic interference
Circuit reduces the electromagnetic interference under complex electromagnetic environment.
According to an aspect of the present invention, the operational amplifier U5, the operational amplifier U6 model be
LM741 forms differential amplifier circuit, amplifies AC signal, reduces due to power-supply fluctuation and zero point caused by varying with temperature
Drift.
According to an aspect of the present invention, the potentiometer RV2, the potentiometer RV3 model be linear potentiometer,
The temperature compensation signal of output can be corrected.
The utility model has the advantages that the present invention is able to solve in the prior art under complex electromagnetic environment because dry by stronger electromagnetism
The missing measurement of temperature caused by when disturbing is controlled by electric current of the high precision electro source unit to power supply, for entire temperature
The operation for spending sensor-based system provides the reasonable energy and supports, realizes the economization effect of maximum likelihood, is supported by electromagnetic interference
Anti- unit reduces the intense electromagnetic interference under complex electromagnetic environment, corrects detection data by temperature-compensation circuit, guarantees thermometric
Data it is accurate.Specifically it will be described below.
Detailed description of the invention
Fig. 1 is structural block diagram of the invention.
Fig. 2 is system circuit diagram of the invention.
Fig. 3 is high-precision power circuit diagram of the invention.
Fig. 4 is that electromagnetic interference of the invention resists circuit diagram.
Fig. 5 is temperature-compensation circuit figure of the invention.
Specific embodiment
As shown in Figure 1, in this embodiment, a kind of temperature-sensing system under complex electromagnetic environment, including high-precision
Power supply unit, temperature detecting unit, electromagnetic interference resist unit and temperature compensation unit；
High precision electro source unit can be mainly divided into power supply output module and energy management module, which is characterized in that for electricity output
Module further includes a kind of high precision electro source circuit, is controlled by electric current of the energy management module to power supply, is entire temperature
The operation of sensor-based system provides the reasonable energy and supports, the energy management module carries out the voltage output of the power supply
The economization effect of maximum likelihood is realized in optimum management；
Temperature detecting unit, including temperature transducer are tested field to complex electromagnetic environment by temperature transducers module and carry out temperature
Measurement, temperature transducers module handles collected temperature detection data, selects thermocouple to make temperature element, so that surveying
Amount range is wide, precision is high, inertia is small and output signal is convenient for teletransmission；
Electromagnetic interference resists unit, including shield shell and a kind of electromagnetic interference resist circuit, connect with temperature transducer, described
Shield shell selects different materials according to varying environment, when the frequency of interference source is lower than 100kHz, using the iron of high permeability
Magnetic material does shield shell, when the frequency of interference source is higher than 100kHz, does shield shell using the material of good conductor, right
Electric field shielding is then used when interference source is voltage, magnetic field shielding is then used when interference source is electric current, guarantees shield effectiveness；
Temperature compensation unit, including temperature-compensation circuit guarantee that the electromagnetic interference resists circuit in certain temperature change model
It works with enclosing interior normal table, and then guarantees the accuracy of the measurement of the temperature under complex electromagnetic environment；
High precision electro source circuit, as shown in figure 3, including transformer TR1, rectifier bridge BR1, integrated regulator U1, operation amplifier
Device U2, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, potentiometer
RV1, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, triode Q1, triode Q2 and reference voltage source D3, the change
The 1st pin of depressor TR1 connects input voltage signal, and the 2nd pin of the transformer TR1 connects input voltage signal, the transformation
The 3rd pin of device TR1 is connect with the 2nd pin of the rectifier bridge BR1, the 4th pin and the rectifier bridge of the transformer TR1
The 3rd pin of BR1 connects, the 1st pin of the rectifier bridge BR1 and one end of the resistance R1, one end of the capacitor C1, institute
State the 2nd pin of integrated regulator U1, one end of the capacitor C2, one end of the capacitor C3, the capacitor C4 one end,
The emitter of the triode Q2, one end of the resistance R9, one end of the resistance R7, the capacitor C5 one end, described
The 2nd pin, the 2nd pin of the reference voltage source D3 and the 3rd pin of the reference voltage source D3 of potentiometer RV1 connects
Ground, the 4th pin of the rectifier bridge BR1 respectively with the other end of the resistance R1, the other end of the capacitor C1, the pressure stabilizing
The 1st pin of integrated circuit U1 connects, the 3rd pin of the integrated regulator U1 respectively with the other end of the capacitor C2,
The other end of the capacitor C3 is connected with the emitter of the triode Q1, and the base stage of the triode Q1 is with the resistance R2's
One end connection, the other end of the resistance R2 are connect with the collector of the triode Q2, the base stage of the triode Q2 and institute
One end of one end, the resistance R9 for stating resistance R8 connects, the other end of the collector of the triode Q1 and the capacitor C4,
3rd pin of one end of the resistance R6, one end of the resistance R3 and the reference voltage source D3 connects output voltage signal,
The other end of the resistance R3 is connect with the 1st pin of the 1st pin of the reference voltage source D3, the potentiometer RV1 respectively,
The 3rd pin of the potentiometer RV1 is connect with one end of the resistance R4 respectively, the other end of the resistance R4 respectively with it is described
One end connection of the other end of capacitor C5, the resistance R5, the other end of the resistance R5 are same with the operational amplifier U2's
Phase input terminal connection, the inverting input terminal of the operational amplifier U2 respectively with the other end of the resistance R6, the resistance R7
Other end connection, the output end of the operational amplifier U2 connect with one end of the resistance R8；
Electromagnetic interference resists circuit, as shown in figure 4, including thermocouple TC1, operational amplifier U3, operational amplifier U4, resistance
R10, resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, capacitor C6, capacitor C7, capacitor C8 and electricity
Hold C9, the cathode of the thermocouple TC1 is connect with the inverting input terminal of the operational amplifier U3, and the thermocouple TC1 is just
Pole and one end of the resistance R10 connect output voltage signal, the one end at the end CJ of the thermocouple TC1 and the resistance R11
Connection, the other end of the resistance R10 non-inverting input terminal with one end of the resistance R12, the operational amplifier U3 respectively
Connection, the other end of the resistance R11 and the other end of the resistance R12 are grounded, the 1st pin of the operational amplifier U3
Jointing temp thermal compensation signal, the 5th pin of the operational amplifier U3 and one end, one end of the capacitor C7 of the capacitor C6 are equal
VCC signal is connect, the other end of the capacitor C6 and the other end of the capacitor C7 are grounded, and the 7th of the operational amplifier U3 the
Pin connects VCC signal, the other end and the electricity of the capacitor C8 with one end of the capacitor C8, one end of the capacitor C9
The other end for holding C9 is grounded, and the 4th pin of the operational amplifier U3 is connect with one end of the resistance R13, the operation
The 8th pin of amplifier U3 is connect with one end of the resistance R14, the other end of the resistance R13 respectively with the resistance R14
The other end, the operational amplifier U4 non-inverting input terminal connection, the inverting input terminal of the operational amplifier U4 respectively with
One end connection of the output end of the operational amplifier U4, the resistance R16, the other end ground connection of the resistance R16, the fortune
The 8th pin for calculating amplifier U3 is connect with one end of the resistance R15, another termination output temperature signal of the resistance R15；
Temperature-compensation circuit, as shown in figure 5, including operational amplifier U5, operational amplifier U6, resistance R17, resistance R18, resistance
R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28,
The non-inverting input terminal difference of resistance R29, potentiometer RV2, potentiometer RV3, capacitor C10 and capacitor C11, the operational amplifier U5
It is connect with one end of one end of the resistance R17, one end of the resistance R18, the capacitor C10, the resistance R17's is another
Terminate VCC signal, the other end of the resistance R18 and the other end of the capacitor C10, one end of the capacitor C11, the electricity
One end, one end of the resistance R27 and one end of the resistance R29 of resistance R25 is grounded, the reverse phase of the operational amplifier U5
Input terminal connects with one end of the output end of the operational amplifier U5, one end of the resistance R19 and the resistance R21 respectively
Connect, the other end of the resistance R19 is connect with one end of the resistance R20, the other end of the resistance R20 respectively with the electricity
Hold one end connection of the other end, the resistance R23 of C11, one end company of the other end of the resistance R21 and the resistance R22
Connect, the other end of the resistance R22 respectively with the 1st pin of the potentiometer RV2, the 3rd pin of the potentiometer RV2 and institute
One end connection of resistance R24 is stated, the 2nd pin of the potentiometer RV2 is connect with the other end of the resistance R25, the resistance
The other end of R23 is connect with the inverting input terminal of one end of the resistance R26, the operational amplifier U6 respectively, the resistance
The other end of R24 is connect with the non-inverting input terminal of the other end of the resistance R27, the operational amplifier U6 respectively, the electricity
The other end of resistance R26 is connect with one end of the output end of the operational amplifier U6, the resistance R28 respectively, the resistance R28
The other end connect with the 1st pin of the potentiometer RV3, the 2nd pin of the potentiometer RV3 and the potentiometer RV3's
The equal jointing temp thermal compensation signal of the other end of 3rd pin, the resistance R29.
In a further embodiment, the integrated regulator U1 model 7818, plays the role of prime pressure stabilizing,
The input and output side of the integrated regulator U1 is respectively connected to the capacitor C1, the capacitor C2, to obtain ripple very little
DC voltage, while the also lesser capacitor C3 of access capacity improves that load respond very much in wink and suppression device itself is because outside
The high-frequency self-excitation that circuit causes.
In a further embodiment, the reference voltage source D3 is accurate reference voltage LM399, the operation amplifier
The model LM741, the reference voltage source D3 of device U2 provides reference voltage for the operational amplifier U2.
In a still further embodiment, the reference voltage that the operational amplifier U2 provides the reference voltage source D3
After being compared with supply voltage, last electric current is output in the triode Q2 and is fed back.
In a further embodiment, the thermocouple TC1 is tested field to complex electromagnetic environment and carries out continuous temperature in real time
Degree measurement, and passes to the operational amplifier U3 for measurement data, by the temperature compensation signal on temperature-compensation circuit into
Row amendment, guarantees comprehensive measurement to the temperature under complex electromagnetic environment.
In a still further embodiment, the thermocouple TC1 and the resistance R10, the resistance R11 and the resistance
R12 forms high-precision bridge circuit, guarantees the accuracy of the temperature measurement data under complex electromagnetic environment.
In a further embodiment, the model AD8429 of the operational amplifier U3 forms signal amplification circuit, puts
Big temperature detection signal.
In a still further embodiment, the operational amplifier U3 believes the temperature measurement data received by temperature-compensating
It number is modified, the interference generated to measurement can be run to avoid circuit.
In a further embodiment, the model AD5488 of the operational amplifier U4, composition inhibit electromagnetic interference electricity
Road reduces the electromagnetic interference under complex electromagnetic environment.
In a still further embodiment, the inhibition electromagnetic interference circuit is also connect with the shield shell, guarantees electricity
The effect of magnetic screen.
In a further embodiment, the operational amplifier U5, the operational amplifier U6 model be LM741,
Differential amplifier circuit is formed, AC signal is amplified, is reduced due to power-supply fluctuation and null offset caused by varying with temperature.
In a further embodiment, the potentiometer RV2, the potentiometer RV3 model be linear potentiometer, can
To correct the temperature compensation signal of output.
In short, being entire the invention has the following advantages that controlled by electric current of the high precision electro source unit to power supply
The operation of temperature-sensing system provides the reasonable energy and supports, realizes the economization effect of maximum likelihood, passes through electromagnetic interference
The intense electromagnetic interference that resisting unit reduces under complex electromagnetic environment guarantees to survey by temperature-compensation circuit amendment detection data
Warm data it is accurate.Specifically it will be described below.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
Claims (8)
1. a kind of temperature-sensing system under complex electromagnetic environment, including high precision electro source unit, temperature detecting unit, electromagnetism
Unit and temperature compensation unit are resisted in interference；
High precision electro source unit can be mainly divided into power supply output module and energy management module, which is characterized in that for electricity output
Module further includes a kind of high precision electro source circuit, is controlled by electric current of the energy management module to power supply, is entire temperature
The operation of sensor-based system provides the reasonable energy and supports, the energy management module carries out the voltage output of the power supply
The economization effect of maximum likelihood is realized in optimum management；
Temperature detecting unit, including temperature transducer are tested field to complex electromagnetic environment by temperature transducers module and carry out temperature
Measurement, temperature transducers module handles collected temperature detection data, and thermocouple is selected to make temperature element, measures model
Enclose that wide, precision is high, inertia is small and output signal is convenient for teletransmission；
Electromagnetic interference resists unit, including shield shell and a kind of electromagnetic interference resist circuit, connect with temperature transducer, described
Shield shell selects different materials according to varying environment, when the frequency of interference source is lower than 100kHz, using the iron of high permeability
Magnetic material does shield shell, when the frequency of interference source is higher than 100kHz, does shield shell using the material of good conductor, right
Electric field shielding is then used when interference source is voltage, magnetic field shielding is then used when interference source is electric current, guarantees shield effectiveness；
Temperature compensation unit, including temperature-compensation circuit guarantee that the electromagnetic interference resists circuit in certain temperature change model
It works with enclosing interior normal table, and then guarantees the accuracy of the measurement of the temperature under complex electromagnetic environment；
High precision electro source circuit, including transformer TR1, rectifier bridge BR1, integrated regulator U1, operational amplifier U2, resistance
R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, potentiometer RV1, capacitor C1,
Capacitor C2, capacitor C3, capacitor C4, capacitor C5, triode Q1, triode Q2 and reference voltage source D3, the transformer TR1
1 pin connects input voltage signal, and the 2nd pin of the transformer TR1 connects input voltage signal, and the 3rd of the transformer TR1 is drawn
Foot is connect with the 2nd pin of the rectifier bridge BR1, the 4th pin of the transformer TR1 and the 3rd pin of the rectifier bridge BR1
Connection, the 1st pin of the rectifier bridge BR1 and one end of the resistance R1, one end of the capacitor C1, the integrated electricity of the pressure stabilizing
The 2nd pin of road U1, one end of the capacitor C2, one end of the capacitor C3, one end of the capacitor C4, the triode Q2
Emitter, one end of the resistance R9, one end of the resistance R7, one end of the capacitor C5, the potentiometer RV1
3rd pin of 2 pins, the 2nd pin of the reference voltage source D3 and the reference voltage source D3 is grounded, the rectifier bridge
The 4th pin of BR1 respectively with the other end of the resistance R1, the other end of the capacitor C1, the integrated regulator U1
The connection of 1st pin, the 3rd pin of the integrated regulator U1 respectively with the other end of the capacitor C2, the capacitor C3
The other end is connected with the emitter of the triode Q1, and the base stage of the triode Q1 is connect with one end of the resistance R2, institute
The other end for stating resistance R2 is connect with the collector of the triode Q2, and the one of the base stage of the triode Q2 and the resistance R8
One end connection at end, the resistance R9, the other end of the collector of the triode Q1 and the capacitor C4, the resistance R6
3rd pin of one end, one end of the resistance R3 and the reference voltage source D3 connects output voltage signal, the resistance R3's
The other end is connect with the 1st pin of the 1st pin of the reference voltage source D3, the potentiometer RV1 respectively, the potentiometer
The 3rd pin of RV1 is connect with one end of the resistance R4 respectively, and the other end of the resistance R4 is another with the capacitor C5 respectively
The non-inverting input terminal of one end connection of one end, the resistance R5, the other end of the resistance R5 and the operational amplifier U2 connect
It connects, the inverting input terminal of the operational amplifier U2 connects with the other end of the other end of the resistance R6, the resistance R7 respectively
It connects, the output end of the operational amplifier U2 is connect with one end of the resistance R8；
Electromagnetic interference resist circuit, including thermocouple TC1, operational amplifier U3, operational amplifier U4, resistance R10, resistance R11,
Resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, capacitor C6, capacitor C7, capacitor C8 and capacitor C9, the thermoelectricity
The cathode of even TC1 is connect with the inverting input terminal of the operational amplifier U3, anode and the resistance of the thermocouple TC1
One end of R10 connects output voltage signal, and the end CJ of the thermocouple TC1 is connect with one end of the resistance R11, the resistance
The other end of R10 is connect with the non-inverting input terminal of one end of the resistance R12, the operational amplifier U3 respectively, the resistance
The other end of R11 and the other end of the resistance R12 are grounded, and the 1st pin jointing temp of the operational amplifier U3 compensates letter
Number, the 5th pin and one end of the capacitor C6, one end of the capacitor C7 of the operational amplifier U3 connects VCC signal, institute
The other end for stating the other end and the capacitor C7 of capacitor C6 is grounded, the 7th pin and the electricity of the operational amplifier U3
One end of one end, the capacitor C9 for holding C8 connects VCC signal, the other end of the other end of the capacitor C8 and the capacitor C9
It is grounded, the 4th pin of the operational amplifier U3 is connect with one end of the resistance R13, and the 8th of the operational amplifier U3 the
Pin is connect with one end of the resistance R14, the other end of the resistance R13 respectively with the other end of the resistance R14, described
The non-inverting input terminal of operational amplifier U4 connects, the inverting input terminal of the operational amplifier U4 respectively with the operational amplifier
One end connection of the output end of U4, the resistance R16, the other end ground connection of the resistance R16, the of the operational amplifier U3
8 pins are connect with one end of the resistance R15, another termination output temperature signal of the resistance R15；
Temperature-compensation circuit, including operational amplifier U5, operational amplifier U6, resistance R17, resistance R18, resistance R19, resistance
R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, resistance R28, resistance R29,
Potentiometer RV2, potentiometer RV3, capacitor C10 and capacitor C11, the non-inverting input terminal of the operational amplifier U5 respectively with the electricity
Hinder one end connection of one end of R17, one end of the resistance R18, the capacitor C10, another termination VCC of the resistance R17
Signal, the other end of the resistance R18 and the other end of the capacitor C10, one end of the capacitor C11, the resistance R25
One end of one end, one end of the resistance R27 and the resistance R29 is grounded, the inverting input terminal of the operational amplifier U5
It is connect respectively with one end of the output end of the operational amplifier U5, one end of the resistance R19 and the resistance R21, it is described
The other end of resistance R19 is connect with one end of the resistance R20, and the other end of the resistance R20 is respectively with the capacitor C11's
One end connection of the other end, the resistance R23, the other end of the resistance R21 is connect with one end of the resistance R22, described
The other end of resistance R22 the 3rd pin and the resistance with the 1st pin of the potentiometer RV2, the potentiometer RV2 respectively
One end of R24 connects, and the 2nd pin of the potentiometer RV2 is connect with the other end of the resistance R25, and the resistance R23's is another
One end is connect with the inverting input terminal of one end of the resistance R26, the operational amplifier U6 respectively, and the resistance R24's is another
One end is connect with the non-inverting input terminal of the other end of the resistance R27, the operational amplifier U6 respectively, the resistance R26's
The other end is connect with one end of the output end of the operational amplifier U6, the resistance R28 respectively, and the resistance R28's is another
End is connect with the 1st pin of the potentiometer RV3, and the 2nd pin of the potentiometer RV3 draws with the 3rd of the potentiometer RV3
The equal jointing temp thermal compensation signal of the other end of foot, the resistance R29.
2. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that described steady
Integrated circuit U1 model 7818 is pressed, prime pressure stabilizing, the input and output side of the integrated regulator U1 are played the role of
It is respectively connected to the capacitor C1, the capacitor C2, to obtain the DC voltage of ripple very little, while the also lesser institute of access capacity
Capacitor C3 is stated, the high-frequency self-excitation that load responds very much in wink and suppression device itself causes by external circuit is improved.
3. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the base
Reference voltage source D3 is accurate reference voltage LM399, the model LM741 of the operational amplifier U2, the reference voltage source
D3 provides reference voltage for the operational amplifier U2.
4. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the heat
Galvanic couple TC1 is tested field to complex electromagnetic environment and carries out continuous real time temperature measurement, and measurement data is passed to the operation
Amplifier U3 is guaranteed by being modified with the temperature compensation signal on temperature-compensation circuit to warm under complex electromagnetic environment
Comprehensive measurement of degree.
5. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the fortune
The model AD8429 of amplifier U3 is calculated, signal amplification circuit is formed, amplifies temperature detection signal.
6. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the fortune
The model AD5488 of amplifier U4 is calculated, composition inhibits electromagnetic interference circuit, reduces the electromagnetic interference under complex electromagnetic environment.
7. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the fortune
Calculate amplifier U5, the model of the operational amplifier U6 is LM741, composition differential amplifier circuit, amplification AC signal, reduction
Due to power-supply fluctuation and null offset caused by varying with temperature.
8. a kind of temperature-sensing system under complex electromagnetic environment according to claim 1, which is characterized in that the electricity
Position device RV2, the potentiometer RV3 model be linear potentiometer, the temperature compensation signal of output can be corrected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580968.9A CN110285890B (en) | 2019-06-29 | 2019-06-29 | Temperature sensing system under complex electromagnetic environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910580968.9A CN110285890B (en) | 2019-06-29 | 2019-06-29 | Temperature sensing system under complex electromagnetic environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110285890A true CN110285890A (en) | 2019-09-27 |
| CN110285890B CN110285890B (en) | 2020-12-15 |
Family
ID=68019871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910580968.9A Expired - Fee Related CN110285890B (en) | 2019-06-29 | 2019-06-29 | Temperature sensing system under complex electromagnetic environment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110285890B (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000307403A (en) * | 1999-04-26 | 2000-11-02 | Toyota Motor Corp | Structure and device for detecting temperature of semiconductor switch element chip, and semiconductor relay |
| US6291826B1 (en) * | 2000-06-19 | 2001-09-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor element for electric power with a diode for sensing temperature and a diode for absorbing static electricity |
| CN2676489Y (en) * | 2004-01-18 | 2005-02-02 | 保定莱特整流器制造有限公司 | A High-reliability high-precision electrocoating DC power supply |
| CN101090206A (en) * | 2007-07-17 | 2007-12-19 | 王自 | Chopper stabilivolt charger |
| CN101285717A (en) * | 2007-04-12 | 2008-10-15 | 天津消防器材有限公司 | Linear temperature-sensing fire disaster detector possessing anti-electromagnetic interference function |
| CN102695339A (en) * | 2012-05-22 | 2012-09-26 | 矽力杰半导体技术(杭州)有限公司 | LED (light-emitting diode) drive circuit with high efficient and high power factor |
| CN102944815A (en) * | 2012-11-30 | 2013-02-27 | 北京拓山电力科技有限公司 | Single-phase earth fault location device of power distribution network based on DC signal detector |
| CN203011570U (en) * | 2012-12-18 | 2013-06-19 | 池春伟 | Anti-electromagnetic interference and high-sensitivity temperature sensor |
| CN203534701U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Illumination detection circuit having temperature compensation function |
| CN203908698U (en) * | 2014-04-30 | 2014-10-29 | 上海出入境检验检疫局机电产品检测技术中心 | Anti-electromagnetic interference temperature sensing device |
| CN204495481U (en) * | 2015-03-19 | 2015-07-22 | 国家电网公司 | Capacitor Internal fuse temperature measuring equipment |
| CN205123609U (en) * | 2015-10-16 | 2016-03-30 | 焦作大学 | Power pack with additional functions device |
| CN206575168U (en) * | 2017-03-21 | 2017-10-20 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device |
| CN107887964A (en) * | 2017-11-29 | 2018-04-06 | 国网河南省电力公司社旗县供电公司 | A kind of adjustable charger circuit of voltage |
| CN108646844A (en) * | 2018-05-31 | 2018-10-12 | 上海矽润科技有限公司 | A kind of temperature-compensation circuit, temperature-compensation method |
| CN208109280U (en) * | 2018-04-28 | 2018-11-16 | 四川华信智创科技有限公司 | A kind of anti-interference temperature sensor |
| US20190128744A1 (en) * | 2013-12-20 | 2019-05-02 | Rolls-Royce Corporation | Emi-compatible mechanical temperature threshold sensor |
-
2019
- 2019-06-29 CN CN201910580968.9A patent/CN110285890B/en not_active Expired - Fee Related
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000307403A (en) * | 1999-04-26 | 2000-11-02 | Toyota Motor Corp | Structure and device for detecting temperature of semiconductor switch element chip, and semiconductor relay |
| US6291826B1 (en) * | 2000-06-19 | 2001-09-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor element for electric power with a diode for sensing temperature and a diode for absorbing static electricity |
| CN2676489Y (en) * | 2004-01-18 | 2005-02-02 | 保定莱特整流器制造有限公司 | A High-reliability high-precision electrocoating DC power supply |
| CN101285717A (en) * | 2007-04-12 | 2008-10-15 | 天津消防器材有限公司 | Linear temperature-sensing fire disaster detector possessing anti-electromagnetic interference function |
| CN101090206A (en) * | 2007-07-17 | 2007-12-19 | 王自 | Chopper stabilivolt charger |
| CN102695339A (en) * | 2012-05-22 | 2012-09-26 | 矽力杰半导体技术(杭州)有限公司 | LED (light-emitting diode) drive circuit with high efficient and high power factor |
| CN102944815A (en) * | 2012-11-30 | 2013-02-27 | 北京拓山电力科技有限公司 | Single-phase earth fault location device of power distribution network based on DC signal detector |
| CN203011570U (en) * | 2012-12-18 | 2013-06-19 | 池春伟 | Anti-electromagnetic interference and high-sensitivity temperature sensor |
| CN203534701U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Illumination detection circuit having temperature compensation function |
| US20190128744A1 (en) * | 2013-12-20 | 2019-05-02 | Rolls-Royce Corporation | Emi-compatible mechanical temperature threshold sensor |
| CN203908698U (en) * | 2014-04-30 | 2014-10-29 | 上海出入境检验检疫局机电产品检测技术中心 | Anti-electromagnetic interference temperature sensing device |
| CN204495481U (en) * | 2015-03-19 | 2015-07-22 | 国家电网公司 | Capacitor Internal fuse temperature measuring equipment |
| CN205123609U (en) * | 2015-10-16 | 2016-03-30 | 焦作大学 | Power pack with additional functions device |
| CN206575168U (en) * | 2017-03-21 | 2017-10-20 | 佛山市施诺尔电气有限公司 | A kind of intelligent capacitor compensation device |
| CN107887964A (en) * | 2017-11-29 | 2018-04-06 | 国网河南省电力公司社旗县供电公司 | A kind of adjustable charger circuit of voltage |
| CN208109280U (en) * | 2018-04-28 | 2018-11-16 | 四川华信智创科技有限公司 | A kind of anti-interference temperature sensor |
| CN108646844A (en) * | 2018-05-31 | 2018-10-12 | 上海矽润科技有限公司 | A kind of temperature-compensation circuit, temperature-compensation method |
Non-Patent Citations (1)
| Title |
|---|
| 常海龙，张丕状: "强电磁干扰环境下高精度温度测量", 《传感器与微***》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110285890B (en) | 2020-12-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204374272U (en) | A kind of mutual inductor mode transformer grounding leakage current wireless monitoring device | |
| CN109798999B (en) | A kind of double galvanic couple temperature measuring devices | |
| CN110504695B (en) | Method for evaluating participation degree of double-fed fan in forced oscillation | |
| CN110285890A (en) | A kind of temperature-sensing system under complex electromagnetic environment | |
| CN105865555B (en) | A kind of high temperature resistance analog drive circuit of Coriolis mass flowmeter | |
| CN204964074U (en) | Single scale intergration pressure sensor signal modulate circuit | |
| CN201464598U (en) | Concealed cable fault detector | |
| CN103529422A (en) | Direct current electric energy meter detection device | |
| CN101788830B (en) | Digital temperature control circuit | |
| CN108802467B (en) | Iron core coil type current transformer with high detection precision and electric leakage detection device | |
| CN202916330U (en) | Current sensor used for static synchronous compensator | |
| CN215338365U (en) | Alternating current signal transmitter | |
| CN2387537Y (en) | Capacity type wet sensitive multifunctional sensor | |
| CN206369977U (en) | The alternating voltage input module of artificial intelligence instrument | |
| CN110260992A (en) | A kind of intelligence high temperature detection sensing device and temperature-compensation method | |
| CN204129211U (en) | A kind of base passive and wireless multi-parameter sensor intelligent electric energy meter temperature rise detecting device | |
| CN209446661U (en) | Electrochemical sensor signal acquisition circuit and electronic equipment | |
| CN210894657U (en) | Portable weak magnetic field measurement system | |
| CN106771882B (en) | Off-line detection positioning method and device for potential problems of high-voltage cable | |
| CN216433971U (en) | High-precision carbon dioxide sensor | |
| CN113447049A (en) | Alternating current signal transmitter | |
| CN204422104U (en) | A kind of furnace temperature instrument compensated with oxygen determination | |
| Zhang et al. | Optical current transducer and its application. | |
| CN205620054U (en) | Pressure becomes power transmission way | |
| CN213843388U (en) | Current analog quantity moment detection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201215 Termination date: 20210629 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |