A pt100 resistor high-precision temperature measurement control system

Abstract

The invention discloses a pt100 resistor high-precision temperature measurement and control system, comprising: a resistor temperature measurement unit, a real-time data acquisition unit, a data transmission unit, a data storage unit, a data processing unit, an intelligent control unit and a real-time monitoring unit; the resistor temperature measurement unit is used to perform real-time temperature measurement on the object to be measured; the real-time data acquisition unit is used to perform real-time acquisition of data information generated by the resistor temperature measurement unit during the temperature measurement process, and belongs to the field of temperature measurement technology. Through real-time acquisition of multi-dimensional data of ambient temperature and humidity, air density, connection wire parameters, and real-time current and voltage, and detailed analysis of the data, the system can accurately calculate and correct the temperature measurement error, and significantly improve the temperature measurement accuracy. At the same time, the intelligent control unit automatically adjusts the temperature of the temperature measurement object according to the analysis results to ensure that the temperature measurement results meet the preset requirements.

Description

Technical Field

[0001] The invention relates to the technical field of temperature measurement, and more specifically discloses a PT100 resistor high-precision temperature measurement and control system. Background Art

[0002] Pt100 is a platinum thermal resistor, and its resistance value will increase at an approximately uniform rate as the temperature rises. In the pt100 resistance temperature measurement system, the two-wire wiring method is frequently used because it is simple, intuitive, and easy to implement. In the two-wire wiring, each end of the pt100 resistor is connected to the measurement circuit through a wire. This configuration simplifies the circuit design, reduces the complexity of wiring, and reduces costs. However, since the connecting wire must have a connecting wire resistance, when used in industrial sites, the connecting wire of the platinum thermal resistor is often very long, and the connecting wire resistance will become an arm in the bridge, which will have a significant impact on the pt100 resistance measurement result, resulting in deviations in the temperature measurement result. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to solve the problem that since the connecting wires inevitably have connecting wire resistance, when used in industrial sites, the connecting wires of platinum thermal resistors are often very long, the connecting wire resistance will become an arm in the bridge, which will in turn have a significant impact on the pt100 resistance measurement results, resulting in deviations in temperature measurement results.

[0004] To solve the above technical problems, according to one aspect of the present invention, more specifically, a pt100 resistor high-precision temperature measurement and control system comprises: a resistor temperature measurement unit, a real-time data acquisition unit, a data transmission unit, a data storage unit, a data processing unit, an intelligent control unit and a real-time monitoring unit;

[0005] Resistance temperature measurement unit: used to measure the temperature of the object to be measured in real time;

[0006] Real-time data acquisition unit: used to collect the data information generated by the resistance temperature measurement unit in real time during the temperature measurement process;

[0007] Data transmission unit: used for real-time transmission of information data collected by the real-time data collection unit;

[0008] Data storage unit: used to store the information data transmitted in real time by the data transmission unit;

[0009] Data processing unit: used to acquire and process the information data stored in the data storage unit to obtain the analysis results, and send the control command signal to the intelligent control unit for intelligent control according to the analysis results;

[0010] Intelligent control unit: used to control the temperature of the temperature measurement object according to the results obtained by the data processing unit, and feed back the control results to the real-time monitoring unit;

[0011] Real-time monitoring unit: used to retrieve the analysis results of the data processing unit, the information data stored in the data storage unit, and the control results of the intelligent control unit, and display them in real time on the display screen of the background terminal.

[0012] Furthermore, the real-time data acquisition unit includes: a temperature acquisition module, a humidity acquisition module and an air acquisition module;

[0013] Temperature acquisition module: used to collect temperature information data of the environment where the resistance temperature measurement unit is located in real time;

[0014] Humidity acquisition module: used to collect humidity information data of the environment where the resistance temperature measurement unit is located in real time;

[0015] Air collection module: used to collect real-time air density information data of the environment where the resistance temperature measurement unit is located.

[0016] Furthermore, the real-time data acquisition unit further includes: a wire acquisition module, a current acquisition module and a voltage acquisition module;

[0017] Wire acquisition module: used to collect the resistivity, length and cross-sectional area information data of the wire connected to the resistance temperature measurement unit;

[0018] Current acquisition module: used to collect current information data on the resistance temperature measurement unit in real time;

[0019] Voltage acquisition module: used to collect voltage information data on the resistance temperature measurement unit in real time.

[0020] Furthermore, the data processing unit includes: a data acquisition module, a core analysis module and a signal sending module;

[0021] Data acquisition module: used for real-time acquisition of information data stored in the data storage unit;

[0022] Core analysis module: used to process and analyze the information data obtained by the data acquisition module and obtain the results of analysis and judgment;

[0023] Signal sending module: used to send corresponding control command signals to the intelligent control unit according to the results of analysis and judgment.

[0024] Furthermore, the intelligent control unit includes: a signal receiving module, a temperature control module and an adjustment feedback module;

[0025] Signal receiving module: used to receive control instructions sent by the signal sending module in real time;

[0026] Temperature control module: used to intelligently adjust the temperature of the detected object;

[0027] Adjustment feedback module: used to feed back the adjustment results of the temperature control module to the real-time monitoring unit.

[0028] Furthermore, the core analysis module can obtain the temperature and humidity information data of the environment in which the resistance temperature measurement unit is located from the data acquisition module, and obtain the environmental impact coefficient through the analysis of the above acquired data, if:

[0029] ;

[0030] This indicates that the environment of the resistance temperature measurement unit is good and the resistance temperature measurement unit operates stably. is the environmental impact coefficient, is the total time of data collection, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, is the preset standard temperature value, is the influence coefficient of the preset temperature on the resistance, is the humidity value of the environment where the resistance temperature measurement unit is located at the i-th second, for The maximum humidity value of the environment where the resistance temperature measuring unit is located within the time. for The minimum humidity value of the environment where the resistance temperature measuring unit is located within the time. is the influence coefficient of preset humidity on resistance, is the preset environmental threshold parameter.

[0031] Furthermore, the core analysis module can obtain the resistivity, length and cross-sectional area of ​​the resistance temperature measurement unit connecting wire and the air density information data of the resistance temperature measurement unit environment from the data acquisition module, and obtain the resistance value of the connecting wire through the above acquired data analysis:

[0032] ;

[0033] in, is the resistance value of the connecting wire, is the resistivity of the connecting wire, is the total length of the connecting wire, is the cross-sectional area of ​​the connecting wire, is the environmental impact coefficient, is the total time of data collection, is the air density value of the environment where the resistance temperature measurement unit is located at the i-th second, It is the preset standard value of air density.

[0034] Furthermore, the core analysis module can obtain the temperature of the environment in which the resistance temperature measurement unit is located, the current and voltage information data on the resistance temperature measurement unit from the data acquisition module, and obtain the temperature of the temperature measurement object through the above acquired data analysis, if:

[0035] ;

[0036] This means that the temperature of the object being measured meets the pre-designed requirements, where is the temperature of the object being measured, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, for The maximum temperature value of the environment where the resistance temperature measuring unit is located within the time. for The minimum temperature value of the environment where the resistance temperature measuring unit is located within the time. is the actual voltage value of the resistance temperature measuring unit, is the actual current value of the resistance temperature measuring unit, is the resistance value of the connecting wire, is the resistance value of pt100 at 0℃, is the preset temperature conversion coefficient, The optimal temperature of the preset temperature measurement object. is the preset temperature threshold parameter.

[0037] Furthermore, the real-time monitoring unit includes: a data retrieval module and an information display module;

[0038] Data retrieval module: used to retrieve the analysis results of the data processing unit, the information data stored in the data storage unit, and the control results of the intelligent control unit in real time;

[0039] Information display module: used to display the information data retrieved by the data retrieval module on the display screen of the background terminal.

[0040] The beneficial effects of the pt100 resistor high-precision temperature measurement and control system of the present invention are as follows: through real-time collection of multi-dimensional data of ambient temperature and humidity, air density, connection wire parameters, and real-time current and voltage, and detailed analysis of the data, the system can accurately calculate and correct the temperature measurement error, significantly improving the temperature measurement accuracy. At the same time, the intelligent control unit automatically adjusts the temperature of the temperature measurement object according to the analysis results to ensure that the temperature measurement results meet the preset requirements. The real-time monitoring unit intuitively displays key information on the background terminal, so that the staff can grasp the temperature measurement situation in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0042] Figure 1 This is a schematic diagram of the system principle. DETAILED DESCRIPTION

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0044] According to one aspect of the present invention, Figure 1 As shown, a PT100 resistor high-precision temperature measurement and control system is provided. First, a resistance temperature measurement unit with a built-in PT100 resistor is placed in a temperature measurement object to measure the temperature of the object in real time. Then, the temperature, humidity, air density, resistivity, length and cross-sectional area of ​​the connecting wire, current on the resistance temperature measurement unit and voltage data of the environment in which the resistance temperature measurement unit is located are respectively collected in real time through the temperature collection module, humidity collection module, air collection module, wire collection module, current collection module and voltage collection module in the real-time data collection unit.

[0045] Then, the collected data is transmitted to the data storage unit in real time through the data transmission unit, and then the information data is obtained from the data storage unit through the data acquisition module in the data processing unit. Further, the obtained information data is processed and analyzed through the core analysis module to obtain the analysis results.

[0046] The core analysis module can obtain the temperature and humidity information data of the environment where the resistance temperature measurement unit is located from the data acquisition module, and obtain the environmental impact coefficient through the above acquired data analysis, if:

[0047] ;

[0048] This means that the environment of the resistance temperature measurement unit is good and the resistance temperature measurement unit is running stably. , it means that the environment of the resistance temperature measurement unit is not good, the resistance temperature measurement unit is unstable, and an alarm is sent to the background terminal. The staff can adjust the temperature and humidity of the resistance temperature measurement unit operating environment through air conditioning equipment. is the environmental impact coefficient, is the total time of data collection, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, is the preset standard temperature value, is the influence coefficient of the preset temperature on the resistance, is the humidity value of the environment where the resistance temperature measurement unit is located at the i-th second, for The maximum humidity value of the environment where the resistance temperature measuring unit is located within the time. for The minimum humidity value of the environment where the resistance temperature measuring unit is located within the time. is the influence coefficient of preset humidity on resistance, is the preset environmental threshold parameter, and its value is 0.01. During the data collection process, the total time of data collection , the influence coefficient of preset temperature on resistance , , preset standard temperature value , the influence coefficient of preset humidity on resistance , , During the time, the maximum and minimum humidity values ​​of the environment where the resistance temperature measurement unit is located are: , , therefore, ,and , indicating that the environment of the resistance temperature measurement unit is good and the resistance temperature measurement unit operates stably.

[0049] The core analysis module can obtain the resistivity, length and cross-sectional area of ​​the resistance temperature measurement unit connecting wire and the air density information data of the resistance temperature measurement unit environment from the data acquisition module, and obtain the resistance value of the connecting wire through the above acquired data analysis:

[0050] ;

[0051] in, is the resistance value of the connecting wire, is the resistivity of the connecting wire, is the total length of the connecting wire, is the cross-sectional area of ​​the connecting wire, is the environmental impact coefficient, is the total time of data collection, is the air density value of the environment where the resistance temperature measurement unit is located at the i-th second, is the preset standard value of air density. During data collection, the resistivity of the connecting wire , the total length of the connecting wire , the cross-sectional area of ​​the connecting wire , Environmental Impact Factor , preset air density standard value , , therefore, .

[0052] The core analysis module can obtain the temperature of the environment in which the resistance temperature measurement unit is located, the current and voltage information data on the resistance temperature measurement unit from the data acquisition module, and obtain the temperature of the temperature measurement object through the above acquired data analysis, if:

[0053] ;

[0054] This means that the temperature of the object being measured meets the pre-designed requirements. Otherwise, , it means that the temperature of the temperature measuring object is too low, the signal sending module will send a control instruction, and the signal receiving module will receive the instruction signal, and then trigger the temperature control module to heat up the temperature measuring object. , it means that the temperature of the temperature measuring object is too high, and the control instruction will be sent through the signal sending module, and the signal receiving module will receive the instruction signal, and then trigger the temperature control module to cool down the temperature measuring object. is the temperature of the object being measured, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, for The maximum temperature value of the environment where the resistance temperature measuring unit is located within the time. for The minimum temperature value of the environment where the resistance temperature measuring unit is located within the time. is the actual voltage value of the resistance temperature measuring unit, is the actual current value of the resistance temperature measuring unit, is the resistance value of the connecting wire, is the resistance value of pt100 at 0℃, is the preset temperature conversion coefficient, The optimal temperature of the preset temperature measurement object. is the preset temperature threshold parameter. During data collection, , the actual voltage value of the resistance temperature measuring unit , the actual current value of the resistance temperature measuring unit , connecting wire resistance value , the resistance value of pt100 at 0℃ , preset temperature conversion coefficient , preset optimal temperature of the temperature measuring object , preset temperature threshold parameters , therefore, , , , , indicating that the temperature of the object being measured meets the pre-design requirements.

[0055] Finally, the analysis results of the data processing unit, the information data stored in the data storage unit, and the control results of the intelligent control unit are retrieved in real time through the data retrieval module, and the information data retrieved by the data retrieval module is displayed on the display screen of the background terminal through the information display module, realizing the visualization of the temperature measurement process, which is convenient for the staff to grasp the temperature measurement situation in time.

[0056] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A pt100 resistor high-precision temperature measurement and control system, characterized in that: include: Resistance temperature measurement unit, real-time data acquisition unit, data transmission unit, data storage unit, data processing unit, intelligent control unit and real-time monitoring unit; Resistance temperature measurement unit: used to measure the temperature of the object to be measured in real time; Real-time data acquisition unit: used to collect the data information generated by the resistance temperature measurement unit in real time during the temperature measurement process; Data transmission unit: used for real-time transmission of information data collected by the real-time data collection unit; Data storage unit: used to store the information data transmitted in real time by the data transmission unit; Data processing unit: used to acquire and process the information data stored in the data storage unit to obtain the analysis results, and send the control command signal to the intelligent control unit for intelligent control according to the analysis results; The data processing unit includes: a core analysis module, which is used to process and analyze the information data acquired by the data acquisition module and obtain the analysis and judgment results; The core analysis module can obtain the temperature and humidity information data of the environment where the resistance temperature measurement unit is located from the data acquisition module, and obtain the environmental impact coefficient through the above acquired data analysis, if: ； This indicates that the environment of the resistance temperature measurement unit is good and the resistance temperature measurement unit operates stably. is the environmental impact coefficient, is the total time of data collection, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, is the preset standard temperature value, is the influence coefficient of the preset temperature on the resistance, is the humidity value of the environment where the resistance temperature measurement unit is located at the i-th second, for The maximum humidity value of the environment where the resistance temperature measuring unit is located within the time. for The minimum humidity value of the environment where the resistance temperature measuring unit is located within the time. is the influence coefficient of preset humidity on resistance, is the preset environmental threshold parameter; The core analysis module can obtain the resistivity, length and cross-sectional area of ​​the resistance temperature measurement unit connecting wire and the air density information data of the resistance temperature measurement unit environment from the data acquisition module, and obtain the resistance value of the connecting wire through the above acquired data analysis: ； in, is the resistance value of the connecting wire, is the resistivity of the connecting wire, is the total length of the connecting wire, is the cross-sectional area of ​​the connecting wire, is the environmental impact coefficient, is the total time of data collection, is the air density value of the environment where the resistance temperature measurement unit is located at the i-th second, is the preset standard value of air density; The core analysis module can obtain the temperature of the environment in which the resistance temperature measurement unit is located, the current and voltage information data on the resistance temperature measurement unit from the data acquisition module, and obtain the temperature of the temperature measurement object through the above acquired data analysis, if: ； This means that the temperature of the object being measured meets the pre-designed requirements, where is the temperature of the object being measured, is the temperature value of the environment where the resistance temperature measuring unit is located in the i-th second, for The maximum temperature value of the environment where the resistance temperature measuring unit is located within the time. for The minimum temperature value of the environment where the resistance temperature measuring unit is located within the time. is the actual voltage value of the resistance temperature measuring unit, is the actual current value of the resistance temperature measuring unit, is the resistance value of the connecting wire, is the resistance value of pt100 at 0℃, is the preset temperature conversion coefficient, The optimal temperature of the preset temperature measurement object. is a preset temperature threshold parameter; Intelligent control unit: used to control the temperature of the temperature measurement object according to the results obtained by the data processing unit, and feed back the control results to the real-time monitoring unit; Real-time monitoring unit: used to retrieve the analysis results of the data processing unit, the information data stored in the data storage unit, and the control results of the intelligent control unit, and display them in real time on the display screen of the background terminal.

2. A pt100 resistor high-precision temperature measurement and control system according to claim 1, characterized in that: The real-time data acquisition unit includes: a temperature acquisition module, a humidity acquisition module and an air acquisition module; Temperature acquisition module: used to collect temperature information data of the environment where the resistance temperature measurement unit is located in real time; Humidity acquisition module: used to collect humidity information data of the environment where the resistance temperature measurement unit is located in real time; Air collection module: used to collect real-time air density information data of the environment where the resistance temperature measurement unit is located.

3. A pt100 resistor high-precision temperature measurement and control system according to claim 2, characterized in that: The real-time data acquisition unit also includes: a wire acquisition module, a current acquisition module and a voltage acquisition module; Wire acquisition module: used to collect the resistivity, length and cross-sectional area information data of the wire connected to the resistance temperature measurement unit; Current acquisition module: used to collect current information data on the resistance temperature measurement unit in real time; Voltage acquisition module: used to collect voltage information data on the resistance temperature measurement unit in real time.

4. A pt100 resistor high-precision temperature measurement and control system according to claim 3, characterized in that: The data processing unit also includes: a data acquisition module and a signal sending module; Data acquisition module: used for real-time acquisition of information data stored in the data storage unit; Signal sending module: used to send corresponding control command signals to the intelligent control unit according to the results of analysis and judgment.

5. A pt100 resistor high-precision temperature measurement and control system according to claim 4, characterized in that: The intelligent control unit includes: a signal receiving module, a temperature control module and an adjustment feedback module; Signal receiving module: used to receive control instructions sent by the signal sending module in real time; Temperature control module: used to intelligently adjust the temperature of the detected object; Adjustment feedback module: used to feed back the adjustment results of the temperature control module to the real-time monitoring unit.

6. A pt100 resistor high-precision temperature measurement and control system according to claim 5, characterized in that: The real-time monitoring unit includes: a data retrieval module and an information display module; Data retrieval module: used to retrieve the analysis results of the data processing unit, the information data stored in the data storage unit, and the control results of the intelligent control unit in real time; Information display module: used to display the information data retrieved by the data retrieval module on the display screen of the background terminal.

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