CN111121999B - Temperature measuring circuit of PT100 resistance core with constant current source - Google Patents
Temperature measuring circuit of PT100 resistance core with constant current source Download PDFInfo
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- CN111121999B CN111121999B CN201911105825.9A CN201911105825A CN111121999B CN 111121999 B CN111121999 B CN 111121999B CN 201911105825 A CN201911105825 A CN 201911105825A CN 111121999 B CN111121999 B CN 111121999B
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- 239000003990 capacitor Substances 0.000 claims description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 238000009529 body temperature measurement Methods 0.000 claims description 12
- 230000015556 catabolic process Effects 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
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- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 2
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- 238000005070 sampling Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 5
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- 210000000056 organ Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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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
- G01K7/21—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 for modifying the output characteristic, e.g. linearising
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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
- G01K7/206—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 in a potentiometer circuit
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- 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
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- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a temperature measuring circuit of a PT100 resistance core with a constant current source, which belongs to the technical field of temperature measuring circuits and comprises a constant current source-resistance voltage division temperature measuring circuit, a constant current source-voltage stabilizing tube temperature measuring circuit, a constant current source-TL 431 temperature measuring circuit and a differential amplifying circuit, wherein the differential amplifying circuit comprises a five-terminal inverting proportional operational amplifying module, a 9 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with a direct current power supply VDD \ 12V, a 7 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with a power supply VDD \ 12V, the constant current source-resistance voltage division temperature measuring circuit, the constant current source-voltage stabilizing tube temperature measuring circuit or the constant current source-TL 431 circuit is connected with the differential amplifying circuit to enable the temperature sampling voltage to linearly change based on the constant current source principle without additional temperature compensation, the energy consumption is reduced, and the cost is reduced.
Description
Technical Field
The invention relates to a temperature measuring circuit, in particular to a temperature measuring circuit of a PT100 resistor core with a constant current source, and belongs to the technical field of temperature measuring circuits.
Background
A sensor is a physical device or biological organ that can detect, sense external signals, physical conditions (e.g., light, heat, humidity) or chemical compositions (e.g., smoke), and transmit the sensed information to other devices or organs, and the national standard GB7665-87 defines the following sensors: the sensor is a detection device which can sense the measured information and convert the sensed information into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like, and is the primary link for realizing automatic detection and automatic control.
A PT100 temperature sensor is a meter that converts a temperature variable into a standardized output signal that can be transmitted, primarily for measurement and control of temperature parameters of industrial processes, and a transmitter with a sensor generally consists of two parts: a sensor and a signal converter. The sensor is mainly a thermocouple or a thermal resistor; the signal converter mainly comprises a measuring unit and a signal processing and converting unit (since the industrial thermal resistance and the thermocouple graduation meter are standardized, the signal converter is also called a transmitter when being used as a stand-alone product), and some transmitters are added with a display unit and have field bus functions.
The temperature measuring circuit connected with the PT100 temperature sensor through the temperature measuring circuit in the prior art often needs to adopt extra temperature compensation when in use, and this kind of mode leads to the excessive consumption of energy to the circuit is too much with material, and the cost is higher, designs a temperature measuring circuit of PT100 resistance core with the constant current source for this reason and optimizes above-mentioned problem.
Disclosure of Invention
The invention mainly aims to provide a temperature measuring circuit of a PT100 resistor core with a constant current source, which is characterized in that a constant current source-resistor voltage division temperature measuring circuit, a constant current source-voltage stabilizing tube temperature measuring circuit or a constant current source-TL 431 temperature measuring circuit is connected with a differential amplification circuit, so that the temperature sampling voltage linear change is achieved based on the constant current source principle, additional temperature compensation is not needed, the energy consumption is reduced, and the cost is reduced.
The purpose of the invention can be achieved by adopting the following technical scheme:
a temperature measuring circuit of a PT100 resistor core with a constant current source comprises a constant current source-resistor voltage division temperature measuring circuit, a constant current source-voltage stabilizing tube temperature measuring circuit, a constant current source-TL 431 temperature measuring circuit and a differential amplifying circuit, wherein the differential amplifying circuit comprises a five-terminal inverse proportion operation amplifying module, a 9 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with a direct current power supply VDD \ 12V, a 7 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with a power supply VDD \ 12V, a 5 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R9 and one end of a resistor R14, a 6 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R10 and one end of a resistor R12, the other end of the resistor R12 is grounded, one end of an 8 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R13, the other end of the resistor R13 is externally connected with one end of a bidirectional breakdown diode D1 and one end of a capacitor C1 and outputs a PT1 wiring end, the other end of the bidirectional breakdown diode D1 is grounded, the other end of the capacitor C1 is connected with the other end of the bidirectional breakdown diode D1, one end of the other end of the resistor R9 is externally connected with one end of a resistor R8 and one end of a resistor R11, the other end of the resistor R11 is grounded, the other end of the resistor R8 is externally connected with a VCC \ 12V, the other end of the resistor R10 is externally connected with a 4 wiring end, and the constant current source-resistor voltage division temperature measuring circuit, the constant current source-voltage stabilizing tube temperature measuring circuit or the constant current source-TL 431 temperature measuring circuit is connected with the.
Preferably, the constant current source-resistance voltage division temperature measurement circuit includes triode Q1, triode Q1's base external resistance R1's one end and resistance R2's one end, resistance R2's other end ground connection, resistance R1's other end external power source VCC \ 12V and resistance temperature sensor PT 1-100's one end, resistance temperature sensor PT 1-100's the external triode Q1's of the other end collecting electrode and output wiring terminal 1 wiring mouth, triode Q1's projecting pole external resistance R3's one end, resistance R3's the other end ground connection, triode Q1's collecting electrode output wiring terminal 1 wiring mouth with difference amplifier circuit's 4 wiring ends are connected.
Preferably, the constant current source-voltage regulator tube temperature measuring circuit comprises a triode Q2, one end of a base electrode of the triode Q2 is connected with one end of a resistor R4 and a cathode of a voltage regulator tube D2, one end of an anode of the voltage regulator tube D2 is grounded, the other end of the resistor R4 is externally connected with a power supply VCC \ 12V, the other end of the resistor R4 is further connected with one end of a resistor temperature sensor PT2-100, the other end of the resistor temperature sensor PT2-100 is connected with a collector electrode of a triode Q2 and an output terminal 2 wiring port, an emitter electrode of the triode Q2 is connected with one end of a resistor R5, the other end of the resistor R5 is grounded, and the collector electrode output terminal 2 wiring port of the triode Q2 is connected with a 4 terminal of the differential amplification circuit.
Preferably, the constant current source-TL 431 temperature measuring circuit includes triode Q3, the one end of resistance R6 and zener diode T1's negative pole are connected to triode Q3's base one end, zener diode T1's positive pole ground connection, resistance R6's other end external power source VCC \ 12V, resistance R6's another termination resistance temperature sensor PT 3-100's one end, resistance temperature sensor PT 3-100's another termination triode Q3's collecting electrode and output terminal 3 wiring mouth, triode Q3's projecting pole meets resistance R7's one end, resistance R7's other end ground connection, triode Q3's collecting electrode output terminal 3 wiring mouth with the 4 wiring ends of differential amplifier circuit are connected.
Preferably, the triode Q1, the triode Q2 and the triode Q3 adopt a model S9013 triode, and the resistor adopts any one of an RT carbon film resistor, an RTL measuring carbon film resistor or an RTX small carbon film resistor, an RTCP ultrahigh frequency carbon film resistor, an RTZ high-resistance carbon film resistor, an RU silicon carbon film resistor, an RY oxidation film resistor or an RJ metal film resistor.
Preferably, the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all adopt high-precision platinum thermal resistance elements, the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all adopt four-core metal shielding wires, and the shells of the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all adopt anti-seismic and anti-corrosion materials.
Preferably, the model of the voltage regulator tube D2 is IN5526, the model of the voltage regulator diode T1 is IN4728A, and the model of the bidirectional breakdown diode is SMAJ.
Preferably, the capacitor C1 is an electrolytic capacitor, a farad capacitor, a low leakage capacitor, a high-voltage high-capacity capacitor, a high-frequency low-resistance capacitor, or an emergency charging and discharging capacitor; any one of a PET electrolytic capacitor or a 6P environment-friendly electrolytic capacitor.
The invention has the beneficial technical effects that:
according to the temperature measuring circuit of the PT100 resistor core with the constant current source, the constant current source-resistor voltage division temperature measuring circuit, the constant current source-voltage stabilizing tube temperature measuring circuit or the constant current source-TL 431 temperature measuring circuit is connected with the differential amplification circuit, so that the linear change of temperature sampling voltage is achieved based on the constant current source principle, additional temperature compensation is not needed, the energy consumption is reduced, and the cost is reduced.
Drawings
FIG. 1 is a circuit diagram of the connection of three thermometric circuits and a differential amplifier circuit of a preferred embodiment of the thermometric circuit of a PT100 resistive core with a constant current source according to the present invention;
FIG. 2 is a circuit diagram of a constant current source-TL 431 based temperature sensing circuit in conjunction with a differential amplification circuit for a preferred embodiment of a temperature sensing circuit for a PT100 resistive core with a constant current source in accordance with the present invention;
FIG. 3 is a circuit diagram of the constant current source-stabilivolt temperature sensing circuit and differential amplifier circuit connection of a preferred embodiment of a temperature sensing circuit of a PT100 resistor core with a constant current source in accordance with the present invention;
fig. 4 is a circuit diagram of a constant current source-resistance voltage division temperature measurement circuit and a differential amplification circuit according to a preferred embodiment of the temperature measurement circuit of the PT100 resistance core having the constant current source according to the present invention.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1-4, the temperature measuring circuit of PT100 resistor core with constant current source provided in this embodiment includes a constant current source-resistor voltage division temperature measuring circuit, a constant current source-voltage regulator tube temperature measuring circuit, a constant current source-TL 431 temperature measuring circuit, and a differential amplifying circuit, where the differential amplifying circuit includes a five-terminal inverting proportional operational amplifying module, a 9 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with a dc power supply VDD \ +12V, a 7 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with a power supply VDD \ +12V, a 5 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with one end of a resistor R9 and one end of a resistor R14, one end of a 6 terminal of the five-terminal inverting proportional operational amplifying module is externally connected with a resistor R10 and one end of a resistor R12, and the other end of the resistor R12 is, the five-terminal inverting proportional operational amplifier module's 8 wiring end external resistance R13's one end with resistance R14's the other end, resistance R13's the external one end of two-way breakdown diode D1 of the other end and electric capacity C1's one end and output PT1 wiring end, two-way breakdown diode D1's the other end ground connection, electric capacity C1's the other end with two-way breakdown diode D1's the other end is connected, resistance R9's the external one end of resistance R8 and resistance R11's one end, resistance R11's the other end ground connection, resistance R8's the external VCC that connects altogether 12V, the external 4 wiring ends that constitute of the other end of resistance R10, constant current source-resistance partial pressure temperature measurement circuit, constant current source-stabilivolt temperature measurement circuit or constant current source-TL 431 temperature measurement circuit with the 4 wiring end of difference amplifier circuit is connected.
The constant current source-resistor voltage division temperature measuring circuit, the constant current source-voltage stabilizing tube temperature measuring circuit or the constant current source-TL 431 temperature measuring circuit is connected with the differential amplification circuit, so that the temperature sampling voltage linear change is achieved based on the constant current source principle, additional temperature compensation is not needed, the energy consumption is reduced, and the cost is reduced.
In this embodiment, the constant current source-resistance voltage-dividing temperature measuring circuit includes triode Q1, triode Q1's base external resistor R1's one end and resistance R2's one end, resistance R2's other end ground connection, resistance R1's other end external power source VCC \ 12V and resistance temperature sensor PT 1-100's one end, resistance temperature sensor PT 1-100's the external triode Q1's of the other end collecting electrode and output wiring terminal 1 wiring mouth, triode Q1's emitter external resistor R3's one end, resistance R3's the other end ground connection, triode Q1's collecting electrode output wiring terminal 1 wiring mouth with difference amplifier circuit's 4 wiring ends are connected.
The power supply is provided by a power supply VCC \ 12V, the external temperature is detected by a resistor temperature sensor PT1-100, so that the resistance is changed, and the detection information is sent to the differential amplification circuit by the collector of the triode Q1, and then the signal is sent out after being amplified.
In this embodiment, the constant current source-regulator tube temperature measuring circuit includes a triode Q2, one end of a base electrode of the triode Q2 is connected with one end of a resistor R4 and a cathode of a regulator tube D2, one end of an anode of the regulator tube D2 is grounded, the other end of the resistor R4 is externally connected with a power supply VCC \ 12V, the other end of the resistor R4 is further connected with one end of a resistor temperature sensor PT2-100, the other end of the resistor temperature sensor PT2-100 is connected with a collector of a triode Q2 and an output terminal 2 connection port, an emitter of the triode Q2 is connected with one end of a resistor R5, the other end of the resistor R5 is grounded, and the collector output terminal 2 connection port of the triode Q2 is connected with a 4 connection port of the differential amplification circuit.
The power supply is provided by a power supply VCC \ 12V, the external temperature is detected by a resistor temperature sensor PT2-100, so that the resistance is changed, and the detection information is sent to the differential amplification circuit by the collector of the triode Q2, and then the signal is sent out after being amplified.
In this embodiment, the constant current source-TL 431 temperature measuring circuit includes a triode Q3, one end of a base of the triode Q3 is connected with one end of a resistor R6 and a cathode of a zener diode T1, an anode of the zener diode T1 is grounded, the other end of the resistor R6 is externally connected with a VCC +12V power supply, the other end of the resistor R6 is connected with one end of a resistor temperature sensor PT3-100, the other end of the resistor temperature sensor PT3-100 is connected with a collector of the triode Q3 and an output terminal 3 wiring port, an emitter of the triode Q3 is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, and the collector output terminal 3 wiring port of the triode Q3 is connected with a 4 wiring terminal of the differential amplifying circuit.
The power supply is provided by a power supply VCC \ 12V, the external temperature is detected by a resistor temperature sensor PT3-100, so that the resistance is changed, and the detection information is sent to the differential amplification circuit by the collector of the triode Q3, and then the signal is sent out after being amplified.
In this embodiment, the triode Q1, the triode Q2, and the triode Q3 are model S9013 triodes, and the resistor is any one of an RT carbon film resistor, an RTL measuring carbon film resistor, an RTX small carbon film resistor, an RTCP ultra-high frequency carbon film resistor, an RTZ high-resistance carbon film resistor, an RU silicon carbon film resistor, an RY oxidation film resistor, or an RJ metal film resistor.
In this embodiment, the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all use high-precision platinum thermal resistance elements, the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all use four-core metal shielded wires, and the housings of the resistance temperature sensors PT1-100, PT2-100 and PT3-100 all use anti-seismic and corrosion-resistant materials.
IN the embodiment, the model of the zener diode D2 is IN5526, the model of the zener diode T1 is IN4728A, and the model of the diac is SMAJ.
In this embodiment, the capacitor C1 is an electrolytic capacitor, a farad capacitor, a low leakage capacitor, a high-voltage high-capacity capacitor, a high-frequency low-resistance capacitor, or an emergency charging/discharging capacitor; any one of a PET electrolytic capacitor or a 6P environment-friendly electrolytic capacitor.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the scope of the present invention, and any person skilled in the art can substitute or change the technical solution of the present invention and its conception within the scope of the present invention.
Claims (5)
1. The utility model provides a temperature measurement circuit of PT100 resistance core with constant current source which characterized in that: the temperature measuring circuit comprises a constant current source-resistor voltage division temperature measuring circuit, a constant current source-voltage stabilizing tube temperature measuring circuit, a constant current source-TL 431 temperature measuring circuit and a differential amplifying circuit, wherein the differential amplifying circuit comprises a five-terminal inverse proportion operation amplifying module, a 9 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with a direct current power supply VDD \ 12V, a 7 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with a power supply VDD \ 12V, a 5 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R9 and one end of a resistor R14, a 6 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R10 and one end of a resistor R12, the other end of the resistor R12 is grounded, an 8 terminal of the five-terminal inverse proportion operation amplifying module is externally connected with one end of a resistor R13, the other end of the resistor R13 is externally connected with one end of a bidirectional breakdown diode D1 and one end of a capacitor C1 and outputs a PT1 terminal, the other end of the bidirectional breakdown diode D1 is grounded, the other end of the capacitor C1 is connected with the other end of the bidirectional breakdown diode D1, the other end of the resistor R9 is externally connected with one end of a resistor R8 and one end of a resistor R11, the other end of the resistor R11 is grounded, the other end of the resistor R8 is externally connected with a power supply VCC \ 12V, the other end of the resistor R10 is externally connected with a terminal 4, the constant current source-resistor voltage division temperature circuit, the constant current source-regulator tube temperature measurement circuit and the constant current source-TL 431 temperature measurement circuit are respectively connected with the terminal 4 of the differential amplification circuit, the constant current source-resistor voltage division temperature measurement circuit comprises a triode Q1, the base of the triode Q1 is externally connected with one end of a, the other end of the resistor R2 is grounded, the other end of the resistor R1 is externally connected with a power supply VCC \ 12V and one end of a resistor temperature sensor PT1-100, the other end of the resistor temperature sensor PT1-100 is externally connected with a collector of a triode Q1 and a wiring port of an output wiring terminal 1, an emitter of the triode Q1 is externally connected with one end of a resistor R3, the other end of the resistor R3 is grounded, the wiring port of the collector output wiring terminal 1 of the triode Q1 is connected with a terminal 4 of the differential amplification circuit, the constant current source-voltage regulator temperature measurement circuit comprises a triode Q2, one end of a base of the triode Q2 is connected with one end of the resistor R4 and a cathode of a voltage regulator D2, one end of an anode of the voltage regulator D2 is grounded, the other end of the resistor R4 is externally connected with the power supply VCC \ 12V, the other end of the resistor R4 is also connected, the other end of the resistance temperature sensor PT2-100 is connected with the collector of a triode Q2 and the output terminal 2 wiring port, the emitter of the triode Q2 is connected with one end of a resistor R5, the other end of the resistor R5 is grounded, the collector output terminal 2 wiring port of the triode Q2 is connected with the 4 wiring port of the differential amplification circuit, the constant current source-TL 431 temperature measurement circuit comprises a triode Q3, one end of the base of the triode Q3 is connected with one end of a resistor R6 and the cathode of a zener diode T1, the anode of the zener diode T1 is grounded, the other end of the resistor R6 is externally connected with a power supply VCC \ 12V, the other end of the resistor R6 is connected with one end of a resistance temperature sensor PT3-100, the other end of the resistance temperature sensor 39PT 48-100 is connected with the collector of a triode Q3 and the output terminal 3 wiring port, the emitter of the triode Q3 is connected with one end of, the other end of the resistor R7 is grounded, and the connection port of the collector output terminal 3 of the triode Q3 is connected with the terminal 4 of the differential amplification circuit.
2. The temperature measuring circuit of a PT100 resistive core having a constant current source of claim 1, wherein: the triode Q1, the triode Q2 and the triode Q3 adopt an S9013 type triode, and the resistor adopts any one of an RT carbon film resistor, an RTL measuring carbon film resistor or an RTX small carbon film resistor, an RTCP ultrahigh frequency carbon film resistor, an RTZ high-resistance carbon film resistor, an RU silicon carbon film resistor, an RY oxidation film resistor or an RJ metal film resistor.
3. The temperature measuring circuit of a PT100 resistive core having a constant current source of claim 1, wherein: resistance temperature sensor PT1-100, resistance temperature sensor PT2-100, resistance temperature sensor PT3-100 all adopt high accuracy platinum resistance elements, resistance temperature sensor PT1-100, resistance temperature sensor PT2-100, resistance temperature sensor PT3-100 all adopt four-core metal shielded wire, resistance temperature sensor PT1-100, resistance temperature sensor PT2-100, resistance temperature sensor PT 3-100's shell all adopts antidetonation corrosion resistant material.
4. The temperature measuring circuit of a PT100 resistive core having a constant current source of claim 1, wherein: the model of the voltage regulator tube D2 is IN5526, the model of the voltage regulator diode T1 is IN4728A, and the model of the bidirectional breakdown diode is SMAJ.
5. The temperature measuring circuit of a PT100 resistive core having a constant current source of claim 1, wherein: the capacitor C1 is an electrolytic capacitor, a farad capacitor, a low leakage capacitor, a high-voltage high-capacity capacitor, a high-frequency low-resistance capacitor and an emergency charging and discharging capacitor; any one of a PET electrolytic capacitor or a 6P environment-friendly electrolytic capacitor.
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| CN201911105825.9A CN111121999B (en) | 2019-11-13 | 2019-11-13 | Temperature measuring circuit of PT100 resistance core with constant current source |
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| CN201911105825.9A CN111121999B (en) | 2019-11-13 | 2019-11-13 | Temperature measuring circuit of PT100 resistance core with constant current source |
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| CN111121999B true CN111121999B (en) | 2021-06-22 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586149A (en) * | 1983-07-05 | 1986-04-29 | Sensormedics Corporation | Temperature control system for cutaneous gas monitor |
| EP0510880A1 (en) * | 1991-04-23 | 1992-10-28 | Kabushiki Kaisha Toshiba | Cryogenic measurement equipment |
| CN1068422A (en) * | 1992-08-15 | 1993-01-27 | 杜大卫 | Temperture teller |
| CN2824003Y (en) * | 2005-08-31 | 2006-10-04 | 乐金电子(天津)电器有限公司 | Temp precise acquiring circuit for air conditioner |
| CN102759414A (en) * | 2012-07-11 | 2012-10-31 | 曙光信息产业(北京)有限公司 | Circuit and method for realizing over-temperature protection |
| CN104568207A (en) * | 2013-10-29 | 2015-04-29 | 成都龙腾中远信息技术有限公司 | Temperature signal acquiring device for vehicle radiator |
| CN104655310A (en) * | 2013-11-25 | 2015-05-27 | 联合汽车电子有限公司 | Temperature detection circuit and implementation method thereof |
| CN205037982U (en) * | 2015-08-27 | 2016-02-17 | 周学伟 | Utilize constant current source temperature detection circuit of operational amplifier characteristic |
| CN205748699U (en) * | 2016-06-03 | 2016-11-30 | 国神光电科技（上海）有限公司 | A kind of linear transform circuit for negative tempperature coefficient thermistor |
| CN205847115U (en) * | 2016-07-27 | 2016-12-28 | 广州达钲电子有限公司 | A kind of constant-current source |
| WO2018087991A1 (en) * | 2016-11-09 | 2018-05-17 | 株式会社デンソー | Thermistor drive circuit |
| CN208155475U (en) * | 2017-11-01 | 2018-11-27 | 南京志卓电子科技有限公司 | A kind of accurate sample temperature device of NTC |
| CN109100052A (en) * | 2018-09-30 | 2018-12-28 | 深圳众城卓越科技有限公司 | A kind of detection circuit of PT100 temperature sensor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6806391B2 (en) * | 2002-07-31 | 2004-10-19 | Shell Oil Company | Process for the carbonylation of ethylenically unsaturated compounds and bidentate diphosphine composition used in this process |
-
2019
- 2019-11-13 CN CN201911105825.9A patent/CN111121999B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586149A (en) * | 1983-07-05 | 1986-04-29 | Sensormedics Corporation | Temperature control system for cutaneous gas monitor |
| EP0510880A1 (en) * | 1991-04-23 | 1992-10-28 | Kabushiki Kaisha Toshiba | Cryogenic measurement equipment |
| CN1068422A (en) * | 1992-08-15 | 1993-01-27 | 杜大卫 | Temperture teller |
| CN2824003Y (en) * | 2005-08-31 | 2006-10-04 | 乐金电子(天津)电器有限公司 | Temp precise acquiring circuit for air conditioner |
| CN102759414A (en) * | 2012-07-11 | 2012-10-31 | 曙光信息产业(北京)有限公司 | Circuit and method for realizing over-temperature protection |
| CN104568207A (en) * | 2013-10-29 | 2015-04-29 | 成都龙腾中远信息技术有限公司 | Temperature signal acquiring device for vehicle radiator |
| CN104655310A (en) * | 2013-11-25 | 2015-05-27 | 联合汽车电子有限公司 | Temperature detection circuit and implementation method thereof |
| CN205037982U (en) * | 2015-08-27 | 2016-02-17 | 周学伟 | Utilize constant current source temperature detection circuit of operational amplifier characteristic |
| CN205748699U (en) * | 2016-06-03 | 2016-11-30 | 国神光电科技（上海）有限公司 | A kind of linear transform circuit for negative tempperature coefficient thermistor |
| CN205847115U (en) * | 2016-07-27 | 2016-12-28 | 广州达钲电子有限公司 | A kind of constant-current source |
| WO2018087991A1 (en) * | 2016-11-09 | 2018-05-17 | 株式会社デンソー | Thermistor drive circuit |
| CN208155475U (en) * | 2017-11-01 | 2018-11-27 | 南京志卓电子科技有限公司 | A kind of accurate sample temperature device of NTC |
| CN109100052A (en) * | 2018-09-30 | 2018-12-28 | 深圳众城卓越科技有限公司 | A kind of detection circuit of PT100 temperature sensor |
Non-Patent Citations (1)
| Title |
|---|
| PT100电路恒流源电路 https://wenku.baidu.com/view/1ee86f145f0e7cd1842536f9.html;佚名;《百度文库》;20110705;全文 * |
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Denomination of invention: A temperature measurement circuit for PT100 resistor core with constant current source Granted publication date: 20210622 Pledgee: Bank of China Limited Yangzhong Branch Pledgor: JIANGSU HENLEY ELECTRIC Co.,Ltd. Registration number: Y2024980038473 |