CN109655172A - A kind of Pt100 thermal resistance sensor simulator based on reverse engineer - Google Patents
A kind of Pt100 thermal resistance sensor simulator based on reverse engineer Download PDFInfo
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- CN109655172A CN109655172A CN201910075197.8A CN201910075197A CN109655172A CN 109655172 A CN109655172 A CN 109655172A CN 201910075197 A CN201910075197 A CN 201910075197A CN 109655172 A CN109655172 A CN 109655172A
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- temperature
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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
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of Pt100 thermal resistance sensor simulator based on reverse engineer, the device solve the problems, such as that temperature sensor simulation actual temperature operating condition is relatively difficult to achieve.The present invention can curve depending on the temperature, the actual temperature operating condition of the flexible and convenient various complexity of simulation.Even under temperature environment exacting terms, the temperature input signal that temperature sensor is not easily accomplished flexible and convenient can also be simulated.And support the detection of multi-route measuring temperature circuit and the simulation of multi way temperature operating condition.Reduce the dependence to temperature environment and temperature sensor, it is flexible to operation, difficulty of test is reduced, has testing cost lower, the higher feature of detection efficiency.
Description
Technical field
The present invention relates to circuit control device more particularly to a kind of Pt100 thermal resistance sensor moulds based on reverse engineer
Quasi- device.
Background technique
In numerous temperature sensors, Pt100 platinum thermal resistance sensor is that a kind of resistance value varies with temperature and changes
Temperature sensor is internationally recognized high precision measuring temperature standard transducer.The essence of Pt100 platinum thermal resistance sensor thermometric is to survey
The variation of resistance is usually converted into the analog signals such as voltage or electric current, then analog signal is converted by the resistance of quantity sensor
Corresponding temperature is conversed at digital signal, then by processor.Since Pt100 platinum thermal resistance sensor has, precision is high, stablizes
Property good and reliable performance the features such as, therefore it is used widely in the industry.It is exceedingly fast in temperature change, extreme temperatures or extremely low
Measurement environment under, it is necessary to use analog temperature sensor, analog temperature sensor price is higher.
In traditional temperature sensor circuit, the mode of temperature input is provided with temperature sensor to simulate actual condition
It is more difficult.And for complicated temperature curve, temperature sensor is not easily accomplished.In addition to this, it is also easy to generate sensor
The problems such as signal is single, detection temperature measurement circuit result precision is lower, detecting step is cumbersome, testing cost is high, detection efficiency is lower.
And in the production and debugging process of temperature measurement circuit, it is often necessary to provide the input quantity of temperature change by temperature sensor to examine
The working performance of slowdown monitoring circuit.With temperature sensor provide temperature input mode it is more difficult to simulate actual condition, it is higher or
The lower temperature input of person, which implements, generally requires harsh external condition.In actual production measurement, it is not easy to realize.?
A fairly large number of detecting instrument measurement voltage, electric current are often needed during detection again, usually can all occupy very big work
Table top product.Testing result precision is lower, and detecting step is cumbersome, and testing cost is high, and detection efficiency is lower.
Summary of the invention
Present invention seek to address that the above problem, can curve depending on the temperature, the various complexity of flexible and convenient simulation
Actual temperature operating condition.Even under temperature environment exacting terms, the temperature input that temperature sensor is not easily accomplished is believed
Number also can be flexible and convenient simulate.And support the detection of multi-route measuring temperature circuit and the simulation of multi way temperature operating condition.The present invention
A kind of Pt100 thermal resistance sensor simulator based on reverse engineer is disclosed, concrete scheme includes:
For acquiring the signal acquisition module of the constant current source current information of temperature measurement circuit output；
The central processing module of the current information of the signal acquisition module transmission is received, the central processing module should
Current signal is converted into voltage signal and carries out gain amplification according to a certain percentage, and the central processing module is according to thermometric electricity
Road actual temperature operating condition is returned in the form of voltage signal setting resistance value to analog sensor temperature value, finally
In temperature measurement circuit.
The central processing module includes at least power module, A/D reference voltage module and signal amplifier module.
The central processing module uses the main control chip of model STM32F103RCT6.
The power module uses PWM type voltage stabilizing chip.
By adopting the above-described technical solution, the present invention utilizes embedded technology, simulation Pt100 resistance and temperature sensing
Device sets the temperature value output of Pt100 thermal resistance according to live actual condition.By the performance indicator, the function that detect temperature measurement circuit
Can whether normal, thus provide temperature measurement circuit whether He Ge foundation.The present invention can simply and easily simulate complicated reality
Temperature case.Under temperature environment exacting terms, the temperature input signal being not easily accomplished to temperature sensor also can be flexible
It is easily simulated, and the device supports the detection of multi-route measuring temperature circuit and the simulation of multi way temperature operating condition, it is possible to reduce right
The dependence of temperature environment and temperature sensor, flexible to operation, reduction difficulty of test, detection effect lower with testing cost
The higher feature of rate.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in application, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of apparatus of the present invention.
Fig. 2 is the working principle diagram of apparatus of the present invention.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, with reference to the attached drawing in the embodiment of the present invention, to this
Technical solution in inventive embodiments carries out clear and complete description:
A kind of Pt100 thermal resistance sensor simulator based on reverse engineer as depicted in figs. 1 and 2, comprising: signal
Collected current signal the constant current source current information of acquisition temperature measurement circuit output and is sent in the course of work by acquisition module
Central processing module.The central processing module is converted into voltage signal by the constant resistance of signal amplifier inside modules,
And amplify by certain gain.According to temperature measurement circuit actual temperature operating condition, analog sensed is realized by setting resistance value inside program
Device temperature value is returned in temperature measurement circuit by signal amplifier module in the form of voltage signal and is handled.To reach
To the whether normal purpose of performance indicator, function of detection temperature measurement circuit, mentioned for production, debugging and the quality testing of temperature measurement circuit
For foundation.
Further, the central processing module includes at least power module, A/D reference voltage module and signal amplification
Device module further includes clock circuit and signal transmission interface.
Further, the central processing unit module chip uses the STM32F103RCT6 core of Cortex-M3 framework
The function of analog-to-digital conversion and digital-to-analogue conversion may be implemented in piece, built-in chip type A/D conversion circuit and D/A conversion circuit, without special
The A/D conversion chip and D/A conversion chip of door.
Further, the power module uses PWM type voltage stabilizing chip LM2576 chip, and it is straight that 24V input is converted to 5V
Galvanic electricity pressure；5V voltage is converted to 3.3V using LM1117 chip by linear stabilized power supply conversion module, is central processing unit mould
Block provides supply voltage.
Further, the signal amplifier module mainly uses 4 LM2902 chips.To signal transmission interface input
Signal is acquired, and is amplified by certain gain；According to temperature measurement circuit actual temperature operating condition setting program resistance value, and with
The form of voltage signal is returned in temperature measurement circuit by signal amplifier module and is handled.
Further, the position the ADC12 Right Aligns mode that analog-to-digital conversion is internally integrated using central processing unit module；Digital-to-analogue
The position the DAC12 Right Aligns mode that conversion module is internally integrated using central processing unit module；STM32 chip clock source is by 8MHz
Crystal oscillating circuit provides；The A/D reference voltage generates 3.3V by REF192 chip and provides；
The course of work of the as shown in Figure 2 device the following steps are included:
S1: the initialization such as system clock, GPIO, TIM, ADC, DMA, DAC；
S2: the present embodiment uses the circulating sampling mode of ADC combination DMA, can effectively improve mean filter sampling rate.
Timing does not reach, and system executes other operations；When timing reaches, by the A/D sampled value progress mean value filter after transmission
Wave processing.The resistance value being arranged in treated ADC numerical value and program is combined as to the temperature output of analog temperature sensor
Signal.In the present embodiment, in timing, sampling number reaches 2048, about 7 μ s of A/D single conversion time, sample frequency
For 141.2KHz；
S3: DAC digital-to-analogue conversion is opened, by the temperature output signal of the obtained analog temperature sensor of ADC with voltage signal
Form be returned in temperature measurement circuit and handled by signal amplifier module.Analog temperature sensor and required actual temperature
Operating condition is compared, and error is up to 2/1000ths.
The present invention provides a kind of Pt100 thermal resistance sensor simulator based on reverse engineer, solves temperature sensor
Simulate actual temperature operating condition problem relatively difficult to achieve.The present invention can curve, flexible and convenient simulation be each depending on the temperature
The complicated actual temperature operating condition of kind.Even under temperature environment exacting terms, temperature that temperature sensor is not easily accomplished
Input signal also flexibly and easily can simulate.And support the detection of multi-route measuring temperature circuit and the simulation of multi way temperature operating condition.
Reduce the dependence to temperature environment and temperature sensor, it is flexible to operation, difficulty of test is reduced, there is testing cost
It is lower, the higher feature of detection efficiency.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (4)
1. a kind of Pt100 thermal resistance sensor simulator based on reverse engineer, characterized by comprising:
For acquiring the signal acquisition module of the constant current source current information of temperature measurement circuit output；
Receive the central processing module of the current information of signal acquisition module transmission, the central processing module is by the electric current
Signal is converted into voltage signal and carries out gain amplification according to a certain percentage, and the central processing module is according to temperature measurement circuit reality
Border temperature case setting resistance value to analog sensor temperature value, thermometric is finally returned in the form of voltage signal
In circuit.
2. a kind of Pt100 thermal resistance sensor simulator based on reverse engineer according to claim 1, feature exist
In: the central processing module includes at least power module, A/D reference voltage module and signal amplifier module.
3. a kind of Pt100 thermal resistance sensor simulator based on reverse engineer according to claim 1, feature exist
In: the central processing module uses the main control chip of model STM32F103RCT6.
4. a kind of Pt100 thermal resistance sensor simulator based on reverse engineer according to claim 1, feature exist
In: the power module uses PWM type voltage stabilizing chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075197.8A CN109655172A (en) | 2019-01-25 | 2019-01-25 | A kind of Pt100 thermal resistance sensor simulator based on reverse engineer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075197.8A CN109655172A (en) | 2019-01-25 | 2019-01-25 | A kind of Pt100 thermal resistance sensor simulator based on reverse engineer |
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| Publication Number | Publication Date |
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| CN109655172A true CN109655172A (en) | 2019-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050179575A1 (en) * | 2004-02-18 | 2005-08-18 | Mcleod Scott C. | Accurate testing of temperature measurement unit |
| CN103017941A (en) * | 2012-12-27 | 2013-04-03 | 北京经纬恒润科技有限公司 | Thermal-resistance simulating device |
| CN203083735U (en) * | 2013-03-08 | 2013-07-24 | 华自科技股份有限公司 | Temperature acquisition device |
| CN106645972A (en) * | 2016-12-19 | 2017-05-10 | 邯郸派瑞节能控制技术有限公司 | Platform used for detecting resistance value of small resistor |
| CN206656813U (en) * | 2017-04-26 | 2017-11-21 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of Pt100 thermal resistance signals analog module |
-
2019
- 2019-01-25 CN CN201910075197.8A patent/CN109655172A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050179575A1 (en) * | 2004-02-18 | 2005-08-18 | Mcleod Scott C. | Accurate testing of temperature measurement unit |
| CN103017941A (en) * | 2012-12-27 | 2013-04-03 | 北京经纬恒润科技有限公司 | Thermal-resistance simulating device |
| CN203083735U (en) * | 2013-03-08 | 2013-07-24 | 华自科技股份有限公司 | Temperature acquisition device |
| CN106645972A (en) * | 2016-12-19 | 2017-05-10 | 邯郸派瑞节能控制技术有限公司 | Platform used for detecting resistance value of small resistor |
| CN206656813U (en) * | 2017-04-26 | 2017-11-21 | 中国船舶重工集团公司第七O三研究所无锡分部 | A kind of Pt100 thermal resistance signals analog module |
Non-Patent Citations (1)
| Title |
|---|
| 周成: "高精度测温系统多通道模拟开关等效内阻温度标定补偿方法", 《仪表技术与传感器》 * |
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Application publication date: 20190419 |
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