Automatic calibration device for platinum resistance thermometers and automatic correction system for pipeline medium temperature

Abstract

The present invention discloses an automatic calibration device for a platinum resistance thermometer and an automatic correction system for a pipeline medium temperature, relating to the field of new energy and energy-saving technologies. The device comprises a processing module, a platinum resistance thermometer, a patch thermometer, and an information storage module. The platinum resistance thermometer is used to collect the medium temperature of a medium in a heating pipeline, and the patch thermometer is used to collect the surface temperature of a wall of the heating pipeline. The processing module is used to determine a pipeline medium temperature correction parameter based on the obtained medium temperature and wall temperature when the heating pipeline is in a non-heating period. Then, when the heating pipeline is in a heating period, the pipeline medium temperature correction parameter is used to automatically correct the medium temperature obtained in real time to obtain a real-time medium temperature correction value. This allows regular calibration of the platinum resistance thermometer without manual intervention, greatly improving work efficiency, and avoiding the impact of errors caused by human factors.

Description

Technical Field

[0001] The present invention belongs to the field of new energy and energy-saving technology, and in particular relates to an automatic correction device for a platinum resistance thermometer and an automatic correction system for pipeline medium temperature. Background Art

[0002] Maintaining a stable temperature within the pipes of residential heating systems is crucial. Therefore, monitoring is essential. This is typically done using an intubation-type temperature collector, often employing a platinum resistance thermometer. However, long-term use of platinum resistance thermometers can lead to measurement deviations, adversely affecting heating system control. To eliminate these deviations, platinum resistance thermometers require periodic calibration.

[0003] At present, the thermometer readings are mainly calibrated manually on site, but this calibration method requires labor. When there are a large number of thermometers in the pipeline network, the efficiency of manual calibration is low and there are human errors. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic calibration device for platinum resistance thermometers and an automatic correction system for pipeline medium temperature, so as to solve the problems of labor-consuming, low efficiency and human error in the existing manual calibration method.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a platinum resistance thermometer automatic calibration device is provided, comprising a processing module, a platinum resistance thermometer, a patch thermometer, and an information storage module, wherein the processing module is communicatively connected to the platinum resistance thermometer, the patch thermometer, and the information storage module respectively;

[0007] The platinum resistance thermometer is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module;

[0008] The patch thermometer is used to collect the wall temperature of the pipeline and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system;

[0009] The processing module is configured to determine, when the same section of the pipeline is in a non-heating period, a pipeline medium temperature correction parameter based on the medium temperature and the wall temperature that are synchronously acquired, and then store the pipeline medium temperature correction parameter in the information storage module; and then, when the same section of the pipeline is in a heating period, read the pipeline medium temperature correction parameter from the information storage module, and automatically correct the medium temperature acquired in real time using the pipeline medium temperature correction parameter to obtain a real-time medium temperature correction value.

[0010] Based on the above invention, a new solution is provided for automatically calibrating a platinum resistance thermometer based on the pipe wall temperature, which includes a processing module, a platinum resistance thermometer, a patch thermometer and an information storage module, wherein the platinum resistance thermometer is used to collect the medium temperature of the medium in the heating pipe, and the patch thermometer is used to collect the wall temperature of the heating pipe wall. The processing module is used to determine the pipe medium temperature correction parameter based on the acquired medium temperature and the wall temperature when the heating pipe is in a non-heating period, and then use the pipe medium temperature correction parameter to automatically correct the medium temperature acquired in real time when the heating pipe is in a heating period to obtain a real-time medium temperature correction value. In this way, regular calibration of the platinum resistance thermometer can be achieved without manual intervention, greatly improving work efficiency, and avoiding the impact of errors caused by human factors.

[0011] In one possible design, a timing module is further included, wherein the timing module is communicatively connected to the controlled end of the patch thermometer;

[0012] The timing module is used to regularly control the working time of the patch thermometer so as to regularly collect the wall temperature of the pipeline wall and regularly determine the pipeline medium temperature correction parameter.

[0013] In a possible design, the processing module is further configured to, after acquiring the wall temperature, determine that the same section of the pipeline is a failed measuring point and terminate the correction if it is found that the fluctuation range of the wall temperature is greater than or equal to a first preset temperature threshold.

[0014] In one possible design, the processing module is further used to, after obtaining the medium temperature and the wall temperature, determine that the same section of the pipeline is a failed measuring point and terminate the correction if it is found that the absolute value of the difference between the medium temperature and the wall temperature is greater than or equal to a second preset temperature threshold.

[0015] In a possible design, a universal interface module is further included that is communicatively connected to the processing module, wherein the universal interface module is used to communicate with a host computer.

[0016] In one possible design, the universal interface module adopts an RS485 communication interface and / or an M-Bus communication interface.

[0017] In one possible design, a power module is further included, wherein the power module includes a battery and a multi-channel switching regulator for providing different output voltages;

[0018] The voltage output terminals of the multi-way switching regulator are electrically connected to the power supply input terminals of the processing module, the platinum resistance thermometer, the chip thermometer and the information storage module respectively.

[0019] In a second aspect, a pipeline medium temperature automatic correction system is provided, comprising a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the processing module is communicatively connected to the platinum resistance temperature measurement module, the patch temperature measurement module, the PID adjustment module and the information storage module respectively;

[0020] The platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module;

[0021] The patch temperature measurement module is used to collect the wall temperature of the pipeline and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system;

[0022] The processing module is configured to, after synchronously acquiring the medium temperature and the wall temperature, first derive an estimated medium temperature value of the medium in the pipeline based on the wall temperature and a known heat transfer model from the pipeline wall to the medium in the pipeline, read a current value of a pipeline medium temperature correction parameter from the information storage module, automatically correct the medium temperature using the current value to obtain a real-time medium temperature correction value, and then transmit the medium temperature correction value and the estimated medium temperature value to the PID adjustment module;

[0023] The PID adjustment module is configured to adjust the pipeline medium temperature correction parameter using a PID algorithm based on a comparison result between the medium temperature correction value and the medium temperature estimated value, obtain a new value of the pipeline medium temperature correction parameter, and feed the new value back to the processing module;

[0024] The processing module is further configured to update the current value of the pipeline medium temperature correction parameter stored in the information storage module to the new value after receiving the new value of the pipeline medium temperature correction parameter.

[0025] Based on the above invention, a new solution for automatically correcting the temperature of the pipeline medium based on the pipeline wall temperature is provided, which includes a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the heating pipeline, the patch temperature measurement module is used to collect the wall temperature of the heating pipeline wall, and the processing module is used to derive the estimated value of the medium temperature of the medium in the pipeline according to the wall temperature and a known heat transfer model after synchronously obtaining the medium temperature and the wall temperature, and read the current value of the pipeline medium temperature correction parameter from the information storage module. , and automatically correct the medium temperature using the current value to obtain a real-time medium temperature correction value, and then transmit the medium temperature correction value and the medium temperature estimated value to the PID adjustment module. The PID adjustment module is used to adjust the pipeline medium temperature correction parameter using a PID algorithm according to a comparison result of the medium temperature correction value and the medium temperature estimated value, obtain a new value of the pipeline medium temperature correction parameter, and feed the new value back to the processing module for updating and storage. In this way, the pipeline medium temperature can be corrected at any time / in real time without manual intervention, which greatly improves work efficiency and avoids the impact of errors caused by human factors.

[0026] In one possible design, a display module is further included, wherein the display module is communicatively connected to the processing module;

[0027] The processing module is further configured to transmit the medium temperature correction value to the display module for real-time display.

[0028] In one possible design, the processing module uses a single-chip microcomputer chip of model STM32 and its peripheral circuits, the platinum resistance temperature measurement module uses an intubation type platinum resistance thermometer, and the patch temperature measurement module uses a patch type MEMS temperature sensor.

[0029] Beneficial effects of the above scheme:

[0030] (1) The present invention creatively provides a new solution for automatically calibrating a platinum resistance thermometer based on the pipe wall temperature, namely, comprising a processing module, a platinum resistance thermometer, a patch thermometer and an information storage module, wherein the platinum resistance thermometer is used to collect the medium temperature of the medium in the heating pipe, the patch thermometer is used to collect the wall temperature of the heating pipe wall, the processing module is used to determine the pipe medium temperature correction parameter according to the obtained medium temperature and the wall temperature when the heating pipe is in a non-heating period, and then use the pipe medium temperature correction parameter to automatically correct the medium temperature obtained in real time when the heating pipe is in a heating period to obtain a real-time medium temperature correction value, thereby realizing regular calibration of the platinum resistance thermometer without manual intervention, greatly improving work efficiency, and avoiding the influence of errors caused by human factors;

[0031] (2) The present invention also creatively provides a new solution for automatically correcting the pipeline medium temperature based on the pipeline wall temperature, which includes a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the heating pipeline, the patch temperature measurement module is used to collect the wall temperature of the heating pipeline wall, the processing module is used to derive the medium temperature estimated value of the medium in the pipeline according to the wall temperature and a known heat transfer model after synchronously obtaining the medium temperature and the wall temperature, and read the current value of the pipeline medium temperature correction parameter from the information storage module. The medium temperature is automatically corrected using the current value to obtain a real-time medium temperature correction value, and the medium temperature correction value and the estimated medium temperature value are then transmitted to the PID adjustment module. The PID adjustment module is used to adjust the pipeline medium temperature correction parameter using a PID algorithm according to a comparison result of the medium temperature correction value and the estimated medium temperature value to obtain a new value of the pipeline medium temperature correction parameter, and feed the new value back to the processing module for updating and storage. In this way, the pipeline medium temperature can be corrected at any time / in real time without manual intervention, which greatly improves work efficiency and avoids the impact of errors caused by human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1This is a schematic diagram of the structure of the automatic calibration device for platinum resistance thermometers provided in an embodiment of the present application.

[0034] Figure 2 This is a schematic diagram of the structure of the automatic temperature correction system for pipeline media provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be briefly introduced below in conjunction with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0036] It should be understood that although the terms first, second, etc. may be used herein to describe various objects, these objects should not be limited by these terms. These terms are merely used to distinguish one object from another. For example, a first object can be referred to as a second object, and similarly, a second object can be referred to as a first object without departing from the scope of the exemplary embodiments of the present invention.

[0037] It should be understood that the term "and / or" that may appear in this document is merely a description of the association relationship between associated objects, indicating that there may be three relationships. For example, A and / or B can indicate three situations: A exists alone, B exists alone, or A and B exist at the same time. For another example, A, B and / or C can indicate the existence of any one of A, B and C or any combination of them. The term " / and" that may appear in this document describes another type of association object relationship, indicating that there may be two relationships. For example, A / and B can indicate two situations: A exists alone or A and B exist at the same time. In addition, the character " / " that may appear in this document generally indicates that the previous and next associated objects are in an "or" relationship.

[0038] Example 1:

[0039] like Figure 1As shown, the automatic calibration device for a platinum resistance thermometer provided in the first aspect of this embodiment includes, but is not limited to, a processing module, a platinum resistance thermometer, a chip thermometer, and an information storage module, wherein the processing module is communicatively connected to the platinum resistance thermometer, the chip thermometer, and the information storage module, respectively; the platinum resistance thermometer is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module; the chip thermometer is used to collect the wall temperature of the pipeline wall and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system; the processing module is used to determine a pipeline medium temperature correction parameter based on the synchronously acquired medium temperature and wall temperature when the same section of the pipeline is in a non-heating period, and then store the pipeline medium temperature correction parameter in the information storage module; and then, when the same section of the pipeline is in a heating period, read the pipeline medium temperature correction parameter from the information storage module, and use the pipeline medium temperature correction parameter to automatically correct the medium temperature acquired in real time to obtain a real-time medium temperature correction value.

[0040] like Figure 1 As shown, in the specific structure of the automatic calibration device for platinum resistance thermometers, the processing module is the core of the device, and its hardware structure can be, but is not limited to, implemented by a single-chip microcomputer chip of the STM32 model and its peripheral circuits. The platinum resistance thermometer can be, but is not limited to, implemented by a tube-type platinum resistance thermometer. The patch thermometer can be, but is not limited to, implemented by a patch-type MEMS (Micro-Electro-Mechanical System) temperature sensor, so that the measured value is converted into a digital signal, making the wall temperature more reliable. The information storage module can be, but is not limited to, implemented by a FLASH memory with a capacity of 8G. In addition to storing the pipeline medium temperature correction parameters, it can also be used to store the medium temperature, the wall temperature, and the medium temperature correction value for many consecutive years.

[0041] Considering that during the non-heating period, the pipeline wall temperature is substantially equal to the pipeline medium temperature, a correction parameter for real-time correction of the medium temperature during the heating period can be obtained based on the medium temperature and the wall temperature obtained during the non-heating period. Specifically, the pipeline medium temperature correction parameter is determined based on the obtained medium temperature and the wall temperature, including but not limited to calculating the pipeline medium temperature correction parameter η according to the following formula:

[0042]

[0043] Where, T Noh,wlrepresents the wall temperature during the non-heating period, T Noh,md Indicates the medium temperature during the non-heating period. When the medium temperature obtained in real time is automatically corrected using the pipeline medium temperature correction parameter, the real-time medium temperature correction value T is calculated according to the following formula, including but not limited to: cr,md :

[0044] T cr,md =(1+η)*T h,md

[0045] Where, T h,md In addition, the pipeline medium temperature correction parameter obtained above can be used in the next heating season and re-determined in the next non-heating period.

[0046] Based on the aforementioned automatic calibration device for platinum resistance thermometers, a new solution for automatically calibrating platinum resistance thermometers based on the pipe wall temperature is provided, which includes a processing module, a platinum resistance thermometer, a patch thermometer and an information storage module, wherein the platinum resistance thermometer is used to collect the medium temperature of the medium in the heating pipe, and the patch thermometer is used to collect the wall temperature of the heating pipe wall. The processing module is used to determine the pipe medium temperature correction parameter based on the acquired medium temperature and the wall temperature when the heating pipe is in a non-heating period, and then use the pipe medium temperature correction parameter to automatically correct the medium temperature acquired in real time when the heating pipe is in a heating period to obtain a real-time medium temperature correction value. In this way, regular calibration of the platinum resistance thermometer can be achieved without manual intervention, greatly improving work efficiency, and avoiding the impact of errors caused by human factors, which is convenient for practical application and promotion.

[0047] Preferably, it also includes but is not limited to a timing module, wherein the timing module is communicatively connected to the controlled end of the patch thermometer; the timing module is used to time the working time of the patch thermometer so as to regularly collect the wall temperature of the pipeline wall and regularly determine the pipeline medium temperature correction parameter. The timing module can be implemented by, but is not limited to, an ultra-low power consumption clock chip of model PCF8563. Since the working time of the patch thermometer can be controlled regularly, the patch thermometer can be started regularly during the preset non-heating period (the specific starting method can be, but is not limited to, powering on and sending an enable signal), and after completing the task of determining the correction parameters, the patch thermometer can be shut down regularly (the specific shut-down method is powering off and sending a non-enable signal), thereby eliminating the need for long-term real-time collection of the wall temperature, thereby achieving energy saving.

[0048] Preferably, the processing module is also used to, after obtaining the wall temperature, if it is found that the fluctuation range of the wall temperature is greater than or equal to a first preset temperature threshold, determine that the same section of the pipeline is a failed measurement point and terminate the correction. Specifically, if it is found that the fluctuation range of the wall temperature within 5 minutes exceeds 1 degree Celsius (i.e., the first preset temperature threshold), the same section of the pipeline can be determined to be a failed measurement point and the correction can be terminated. In this way, the failed measurement point can be discarded in time to avoid adverse effects on the control of the heating system. Similarly, the processing module can also be used to, after obtaining the medium temperature and the wall temperature, if it is found that the absolute value of the difference between the medium temperature and the wall temperature is greater than or equal to a second preset temperature threshold, determine that the same section of the pipeline is a failed measurement point and terminate the correction. The aforementioned second preset temperature threshold can be specifically exemplified as 3 degrees Celsius.

[0049] Preferably, it further comprises a universal interface module that is communicatively connected to the processing module, wherein the universal interface module is used to communicate with the host computer. Figure 1 As shown, by configuring the universal interface module, the medium temperature correction value and measurement point failure information can be reported to the host computer to meet the application requirements of multiple scenarios. Specifically, the universal interface module can be, but is not limited to, an RS485 communication interface and / or an M-Bus communication interface.

[0050] Preferably, a display module is further included, wherein the display module is communicatively connected to the processing module; the processing module is further configured to transmit the medium temperature correction value to the display module for real-time display. The display module is preferably a liquid crystal display.

[0051] Preferably, the device further includes a power module, wherein the power module includes a battery and a multi-way switching regulator for providing different output voltages; the voltage output terminals of the multi-way switching regulator are electrically connected to the power input terminals of the processing module, the platinum resistance thermometer, the chip thermometer, and the information storage module. The specific design of the power module can provide a constant-voltage DC power supply, ensuring the normal operation of the entire device. Furthermore, the voltage output terminals of the multi-way switching regulator can also be electrically connected to the power input terminals of the timing module, the universal interface module, the display module, and the like.

[0052] In summary, the automatic calibration device for platinum resistance thermometers provided in this embodiment has the following technical effects:

[0053] (1) This embodiment provides a new solution for automatically calibrating a platinum resistance thermometer based on the pipe wall temperature, which includes a processing module, a platinum resistance thermometer, a patch thermometer and an information storage module, wherein the platinum resistance thermometer is used to collect the medium temperature of the medium in the heating pipe, and the patch thermometer is used to collect the wall temperature of the heating pipe wall. The processing module is used to determine the pipe medium temperature correction parameter based on the obtained medium temperature and the wall temperature when the heating pipe is in a non-heating period, and then use the pipe medium temperature correction parameter to automatically correct the medium temperature obtained in real time when the heating pipe is in a heating period to obtain a real-time medium temperature correction value. In this way, regular calibration of the platinum resistance thermometer can be achieved without manual intervention, which greatly improves work efficiency and avoids the impact of errors caused by human factors, facilitating practical application and promotion.

[0054] Example 2:

[0055] like Figure 2 As shown, this embodiment further provides another automatic correction scheme for pipeline medium temperature based on pipeline wall temperature based on the inventive concept described in Example 1, that is, a pipeline medium temperature automatic correction system is provided, including a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the processing module is communicatively connected to the platinum resistance temperature measurement module, the patch temperature measurement module, the PID adjustment module and the information storage module respectively; the platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module; the patch temperature measurement module is used to collect the wall temperature of the pipeline wall and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system; the processing module is used to, after synchronously acquiring the medium temperature and the wall temperature, first collect the medium temperature and the wall temperature according to the information storage module; The wall temperature and a known heat transfer model from the pipe wall to the medium in the pipe are used to derive an estimated medium temperature value of the medium in the pipe, and the current value of the pipe medium temperature correction parameter is read from the information storage module, and the medium temperature is automatically corrected using the current value to obtain a real-time medium temperature correction value, and then the medium temperature correction value and the estimated medium temperature value are transmitted to the PID adjustment module; the PID adjustment module is used to adjust the pipe medium temperature correction parameter using a PID algorithm based on a comparison result of the medium temperature correction value and the estimated medium temperature value, obtain a new value of the pipe medium temperature correction parameter, and feed the new value back to the processing module; the processing module is also used to update the current value of the pipe medium temperature correction parameter stored in the information storage module to the new value after receiving the new value of the pipe medium temperature correction parameter.

[0056] like Figure 2 As shown, in the specific structure of the pipeline medium temperature automatic correction system, the processing module is the core of the system, and its hardware structure can be implemented by, but is not limited to, a single-chip microcomputer chip of the STM32 model and its peripheral circuits. The platinum resistance temperature measurement module can be implemented by, but is not limited to, a plug-in platinum resistance thermometer. The patch temperature measurement module can be implemented by, but is not limited to, a patch MEMS (Micro-Electro-Mechanical System) temperature sensor to convert the measured value into a digital signal, thereby making the wall temperature more reliable. The information storage module can be implemented by, but is not limited to, an 8G FLASH memory. In addition to storing the pipeline medium temperature correction parameters, it can also be used to store the medium temperature, the wall temperature, and the medium temperature correction value for multiple consecutive years. The known heat transfer model can be specifically determined in advance using existing thermal engineering based on information such as the installation location of the platinum resistance temperature measurement module and the patch temperature measurement module, the material of the same section of the pipeline, and the heat transfer direction from the inside to the outside. The PID (short for Proportional, Integral, and Differential) algorithm is an existing control algorithm that combines proportional, integral, and differential control elements. It is the most technologically mature and widely used control algorithm in continuous systems. Appearing in the 1930s and 1940s, this control algorithm is suitable for situations where the controlled object model is not clearly understood. Therefore, the PID algorithm can be used to adjust the pipeline medium temperature correction parameter based on the comparison result of the medium temperature correction value and the estimated medium temperature value to obtain a new value for the pipeline medium temperature correction parameter and update it.

[0057] Based on the aforementioned automatic correction system for pipeline medium temperature, a new solution for automatically correcting the pipeline medium temperature based on the pipeline wall temperature is provided, which includes a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the heating pipeline, the patch temperature measurement module is used to collect the wall temperature of the heating pipeline wall, the processing module is used to derive the estimated medium temperature value of the medium in the pipeline according to the wall temperature and the known heat transfer model after synchronously obtaining the medium temperature and the wall temperature, and read the pipeline medium temperature correction value from the information storage module. The current value of the parameter is used to automatically correct the medium temperature, obtaining a real-time medium temperature correction value. The medium temperature correction value and the estimated medium temperature value are then transmitted to the PID adjustment module. The PID adjustment module is used to adjust the pipeline medium temperature correction parameter using a PID algorithm based on the comparison result of the medium temperature correction value and the estimated medium temperature value, obtaining a new value for the pipeline medium temperature correction parameter. This new value is then fed back to the processing module for updating and storage. This allows for real-time correction of the pipeline medium temperature without manual intervention, greatly improving work efficiency and avoiding the impact of human error. In addition, due to the low operating power consumption and simple working scenarios of the patch temperature measurement module, it is suitable for promotion and application in existing heating pipelines.

[0058] Preferably, the processing module is also used to, after obtaining the wall temperature, if it is found that the fluctuation range of the wall temperature is greater than or equal to a first preset temperature threshold, determine that the same section of the pipeline is a failed measurement point and terminate the correction. Specifically, if it is found that the fluctuation range of the wall temperature within 5 minutes exceeds 1 degree Celsius (i.e., the first preset temperature threshold), the same section of the pipeline can be determined to be a failed measurement point and the correction can be terminated. In this way, the failed measurement point can be discarded in time to avoid adverse effects on the control of the heating system. Similarly, the processing module can also be used to, after obtaining the medium temperature and the wall temperature, if it is found that the absolute value of the difference between the medium temperature and the wall temperature is greater than or equal to a second preset temperature threshold, determine that the same section of the pipeline is a failed measurement point and terminate the correction. The aforementioned second preset temperature threshold can be specifically exemplified as 3 degrees Celsius.

[0059] Preferably, it further comprises a universal interface module that is communicatively connected to the processing module, wherein the universal interface module is used to communicate with the host computer. Figure 2 As shown, by configuring the universal interface module, the medium temperature correction value and measurement point failure information can be reported to the host computer to meet the application requirements of multiple scenarios. Specifically, the universal interface module can be, but is not limited to, an RS485 communication interface and / or an M-Bus communication interface.

[0060] Preferably, a display module is further included, wherein the display module is communicatively connected to the processing module; the processing module is further configured to transmit the medium temperature correction value to the display module for real-time display. The display module is preferably a liquid crystal display.

[0061] Preferably, a power supply module is further included, wherein the power supply module includes a battery and a multi-way switching regulator for providing different output voltages; the voltage output end of the multi-way switching regulator is electrically connected to the power supply input end of the processing module, the platinum resistance temperature measurement module, the patch temperature measurement module, the PID adjustment module, and the information storage module. Through the specific design of the aforementioned power supply module, a constant voltage DC power supply can be provided to ensure the normal operation of the entire system. In addition, the voltage output end of the multi-way switching regulator can also be electrically connected to the power supply input end of the universal interface module and the display module, etc.

[0062] In summary, the automatic temperature correction system for pipeline media provided by this embodiment has the following technical effects:

[0063] (1) This embodiment provides a new solution for automatically correcting the pipeline medium temperature based on the pipeline wall temperature, namely, it includes a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the heating pipeline, the patch temperature measurement module is used to collect the wall temperature of the heating pipeline wall, the processing module is used to derive the estimated medium temperature value of the medium in the pipeline according to the wall temperature and a known heat transfer model after synchronously obtaining the medium temperature and the wall temperature, and read the current value of the pipeline medium temperature correction parameter from the information storage module, The current value is used to automatically correct the medium temperature to obtain a real-time medium temperature correction value, and then the medium temperature correction value and the medium temperature estimated value are transmitted to the PID adjustment module. The PID adjustment module is used to adjust the pipeline medium temperature correction parameter using a PID algorithm according to the comparison result of the medium temperature correction value and the medium temperature estimated value to obtain a new value of the pipeline medium temperature correction parameter, and feed the new value back to the processing module for updating and storage. In this way, the pipeline medium temperature can be corrected at any time / in real time without manual intervention, which greatly improves work efficiency and avoids the impact of errors caused by human factors.

[0064] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An automatic calibration device for a platinum resistance thermometer, characterized in that: It includes a processing module, a platinum resistance thermometer, a patch thermometer and an information storage module, wherein the processing module is communicatively connected to the platinum resistance thermometer, the patch thermometer and the information storage module respectively; The platinum resistance thermometer is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module; The patch thermometer is used to collect the wall temperature of the pipeline and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system; The processing module is configured to determine, when the same section of the pipeline is in a non-heating period, a pipeline medium temperature correction parameter based on the medium temperature and the wall temperature obtained synchronously, and then store the pipeline medium temperature correction parameter in the information storage module; and then, when the same section of the pipeline is in a heating period, read the pipeline medium temperature correction parameter from the information storage module, and automatically correct the medium temperature obtained in real time using the pipeline medium temperature correction parameter to obtain a real-time medium temperature correction value; The processing module is further configured to, after obtaining the wall surface temperature, determine that the same section of the pipeline is a failed measurement point and terminate the calibration if it is found that the fluctuation range of the wall surface temperature is greater than or equal to a first preset temperature threshold; The processing module is further configured to, after obtaining the medium temperature and the wall temperature, determine that the same section of the pipeline is a failed measuring point and terminate the correction if it is found that the absolute value of the difference between the medium temperature and the wall temperature is greater than or equal to a second preset temperature threshold.

2. The automatic calibration device for platinum resistance thermometer according to claim 1, characterized in that: Also included is a timing module, wherein the timing module is communicatively connected to the controlled end of the patch thermometer; The timing module is used to regularly control the working time of the patch thermometer so as to regularly collect the wall temperature of the pipeline wall and regularly determine the pipeline medium temperature correction parameter.

3. The automatic calibration device for platinum resistance thermometer according to claim 1, characterized in that: It also includes a universal interface module that is communicatively connected to the processing module, wherein the universal interface module is used to communicate with a host computer.

4. The automatic calibration device for platinum resistance thermometer according to claim 3, characterized in that: The universal interface module adopts RS485 communication interface and / or M-Bus communication interface.

5. The automatic calibration device for platinum resistance thermometer according to claim 1, characterized in that: Also included is a power supply module, wherein the power supply module includes a battery and a multi-way switching regulator for providing different output voltages; The voltage output terminals of the multi-way switching regulator are electrically connected to the power supply input terminals of the processing module, the platinum resistance thermometer, the chip thermometer and the information storage module respectively.

6. A pipeline medium temperature automatic correction system, characterized in that: It includes a processing module, a platinum resistance temperature measurement module, a patch temperature measurement module, a PID adjustment module and an information storage module, wherein the processing module is communicatively connected to the platinum resistance temperature measurement module, the patch temperature measurement module, the PID adjustment module and the information storage module respectively; The platinum resistance temperature measurement module is used to collect the medium temperature of the medium in the pipeline and transmit the medium temperature to the processing module; The patch temperature measurement module is used to collect the wall temperature of the pipeline and transmit the wall temperature to the processing module, wherein the pipeline wall and the medium in the pipeline belong to the same section of the pipeline in the heating system; The processing module is configured to, after synchronously acquiring the medium temperature and the wall temperature, first derive an estimated medium temperature value of the medium in the pipeline based on the wall temperature and a known heat transfer model from the pipeline wall to the medium in the pipeline, read a current value of a pipeline medium temperature correction parameter from the information storage module, automatically correct the medium temperature using the current value to obtain a real-time medium temperature correction value, and then transmit the medium temperature correction value and the estimated medium temperature value to the PID adjustment module; The PID adjustment module is configured to adjust the pipeline medium temperature correction parameter using a PID algorithm based on a comparison result between the medium temperature correction value and the medium temperature estimated value, obtain a new value of the pipeline medium temperature correction parameter, and feed the new value back to the processing module; The processing module is further configured to update the current value of the pipeline medium temperature correction parameter stored in the information storage module to the new value after receiving the new value of the pipeline medium temperature correction parameter; The processing module is further configured to, after obtaining the wall surface temperature, determine that the same section of the pipeline is a failed measurement point and terminate the calibration if it is found that the fluctuation range of the wall surface temperature is greater than or equal to a first preset temperature threshold; The processing module is further configured to, after obtaining the medium temperature and the wall temperature, determine that the same section of the pipeline is a failed measuring point and terminate the correction if it is found that the absolute value of the difference between the medium temperature and the wall temperature is greater than or equal to a second preset temperature threshold.

7. The automatic temperature correction system for pipeline medium according to claim 6, characterized in that: Also included is a display module, wherein the display module is communicatively connected to the processing module; The processing module is further configured to transmit the medium temperature correction value to the display module for real-time display.

8. The automatic temperature correction system for pipeline medium according to claim 6, characterized in that: The processing module adopts a single-chip microcomputer chip of model STM32 and its peripheral circuits, the platinum resistance temperature measurement module adopts an intubation type platinum resistance thermometer, and the patch temperature measurement module adopts a patch type MEMS temperature sensor.

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