CN212391150U - Temperature sensor precision test system - Google Patents
Temperature sensor precision test system Download PDFInfo
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- CN212391150U CN212391150U CN202022216373.6U CN202022216373U CN212391150U CN 212391150 U CN212391150 U CN 212391150U CN 202022216373 U CN202022216373 U CN 202022216373U CN 212391150 U CN212391150 U CN 212391150U
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Abstract
The utility model provides a temperature sensor precision test system, include standard platinum resistance and wait to detect temperature sensor setting in the thermostatic bath, and standard platinum resistance and wait to detect temperature sensor and stack formula temperature and patrol and examine the module and link to each other, stack formula temperature is patrolled and examined the module and is acquireed standard platinum resistance and wait to detect temperature sensor's current resistance. The testing constant temperature bath is connected with the stack type temperature patrol module and the verification calibration controller through the multi-channel communication module, and the verification calibration controller determines target calibration data based on the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected. Therefore, the precision accuracy of the temperature sensor can be detected in time, detection parameters do not need to be manually input, and the precision detection efficiency of the temperature sensor is improved.
Description
Technical Field
The utility model relates to a temperature sensor precision measurement technical field, in particular to temperature sensor precision test system.
Background
The safety of train operation is related to the life and property safety of the vast people, so that the requirements on the reliability, the usability and the safety of the train are very high. The temperature sensor for the rail vehicle is used as an important component of the whole monitoring system of the rail vehicle, is applied to detecting and monitoring important parameters such as temperature on the vehicle and the like, and ensures that a train runs in a normal state or an optimal state. The accuracy of the rail vehicle temperature sensor is a main factor for judging the performance of the sensor. The existing sensor precision is mainly that the temperature of the surface of an object and the environment where the object is located is directly measured by using a multimeter, a resistance meter and the like. The inventor finds that the measured value also needs to be calculated manually and has certain errors due to the factors of the temperature sensor such as on-line cable resistance, calculation correction value, error, uncertainty and calibration of the equipment. The accuracy and the error directly influence the accuracy and the reliability of the sensor, and the problems of low accuracy, poor controllability and the like exist.
Therefore, how to provide a precision testing system for a temperature sensor, which can detect the precision and accuracy of the temperature sensor in time, is a major technical problem that needs to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model provides a temperature sensor precision test system can in time detect temperature sensor's the precision degree of accuracy.
In order to achieve the purpose, the technical scheme provided by the application is as follows:
a temperature sensor accuracy testing system, comprising: the system comprises a standard platinum resistor, a temperature sensor to be detected, a test constant temperature tank, a stack type temperature inspection module, a multi-channel communication module and a verification calibration controller;
the standard platinum resistor and the temperature sensor to be detected are arranged in the constant temperature bath, the standard platinum resistor and the temperature sensor to be detected are connected with the stacked temperature inspection module, and the stacked temperature inspection module acquires the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected;
the testing constant temperature bath is connected with the stack type temperature inspection module and the verification calibration controller through the multi-channel communication module, and the verification calibration controller determines target calibration data based on the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected.
Optionally, the test constant temperature bath at least comprises one or more of a constant temperature oil bath, a constant temperature alcohol bath and a constant temperature water bath.
Optionally, the stacked temperature inspection module includes: the system comprises a first controller and at least one functional submodule;
the first controller is connected with the functional sub-module and generates a control signal based on the obtained current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected;
and the functional sub-module executes corresponding operation based on the control signal.
Optionally, the multichannel communication module is a multichannel 232 communication box.
The utility model provides a temperature sensor precision test system, this test system includes: the device comprises a standard platinum resistor, a temperature sensor to be detected, a test constant temperature tank, a stack type temperature inspection module, a multi-channel communication module and a verification calibration controller. The standard platinum resistor and the temperature sensor to be detected are arranged in the constant temperature tank, the standard platinum resistor and the temperature sensor to be detected are connected with the stack type temperature inspection module, and the stack type temperature inspection module acquires the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected. The testing constant temperature bath is connected with the stack type temperature inspection module and the verification calibration controller through the multi-channel communication module, and the verification calibration controller determines target calibration data based on the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected. Therefore, the testing system provided by the scheme can timely detect the accuracy of the precision of the temperature sensor, the detection parameters do not need to be manually input, and the precision detection efficiency of the temperature sensor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a test system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a test system according to an embodiment of the present invention;
fig. 3 is a schematic view of an operation flow of a testing system according to an embodiment of the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As described in the background, the inventors have found that the accuracy of the existing temperature sensor is mainly measured directly on the surface of an object and the temperature of the environment in which the object is located by using a multimeter, a resistance meter, or the like. Because the temperature sensor has the factors of on-line cable resistance, calculation correction value, error, uncertainty, equipment calibration and the like, the measured value also needs to be calculated manually, and certain error exists. The accuracy and the error directly influence the accuracy and the reliability of the sensor, so the problems of low accuracy, poor controllability and the like exist.
Based on this, the embodiment of the utility model provides a temperature sensor precision test system can in time detect temperature sensor's the precision degree of accuracy, can directly convert the precision value of test to the temperature display and need not the manual calculation. The values of resistance, voltage and the like can also be directly displayed. The method can automatically calculate the errors generated by the cable resistance of the sensor wire, the correction value, the error, the uncertainty and the like, thereby effectively avoiding the occurrence of large measurement error after long-term use. And further avoids the resulting severe impact on the utility associated with the measured temperature sensor.
Specifically, please refer to fig. 1, fig. 1 is a schematic structural diagram of a temperature sensor precision testing system according to an embodiment of the present invention, the detecting system includes: the device comprises a standard platinum resistor 1, a temperature sensor 2 to be detected, a test thermostatic bath 3, a stack type temperature patrol module 4, a multi-channel communication module 5 and a verification calibration controller 6.
The standard platinum resistor and the temperature sensor to be detected are arranged in the constant temperature tank, the standard platinum resistor and the temperature sensor to be detected are connected with the stack type temperature inspection module, and the stack type temperature inspection module acquires the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected.
The testing constant temperature bath is connected with the stack type temperature inspection module and the verification calibration controller through the multi-channel communication module, and the verification calibration controller determines target calibration data based on the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected.
It should be noted that, in the temperature sensor accuracy testing system provided in this embodiment, the testing thermostat includes at least one or more of a thermostat oil bath, a thermostat alcohol bath, and a thermostat water bath. The module is patrolled and examined to stack formula temperature includes: the first controller is connected with the functional sub-module and generates a control signal based on the obtained current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected. And the functional sub-module executes corresponding operation based on the control signal. The multi-channel communication module is a multi-channel 232 communication box.
Illustratively, as shown in fig. 2, the utility model provides a pair of temperature sensor precision test system comprises thermostatic bath 21, multichannel 232 communication box 22, stack formula temperature system of patrolling and examining 23, standard platinum resistance 24, the temperature sensor 25 that awaits measuring, automatic examination and calibration software 26.
The constant temperature bath 21 is divided into a constant temperature alcohol bath, a constant temperature water bath and a constant temperature oil bath, and the corresponding constant temperature bath is selected according to the test requirement. The thermostat 21 is connected to a multi-channel 232 communications box 22 for digital communication via an RS-232 and optional IEEE-488 interface. The multichannel 232 communication box is connected with the stack type temperature inspection system 23, namely, the thermostatic bath 21 is connected with the stack type temperature inspection system 23 through the multichannel 232 communication box 22.
Wherein, a built-in serial RS-232 port is arranged in the main controller of the stack type temperature inspection system 23 and is connected with a multi-channel 232 communication box. The stack type temperature inspection system 23 is composed of a main controller and an additional module. The main controller is the core module of the system, directly controls all operations, and sends control signals to each module to provide power. Each module can be stacked directly behind the previous module; when a module is added, the software of the stacked temperature patrol system is automatically reconfigured to include all of the new functionality provided by the module. All modules are system attachments that can measure temperature and communicate with other instruments. Different modules have different functions, in the embodiment, at most 8 sensors can be simultaneously connected to the stacked temperature inspection system module for alternate measurement, and the scanning switch module can be connected with two lines, three lines or four lines.
The standard platinum resistor 24 and the temperature sensor 25 to be measured are placed in the thermostatic bath 21 together, and are connected with the stack type temperature inspection system 23 respectively. After the temperature of the temperature sensor in the thermostatic bath 21 is stable, the resistance values or the temperature values of the standard platinum resistor 24 and the temperature sensor 25 to be measured can be read from the stack type temperature inspection system 23, and the temperature value in the thermostatic bath 1 at the moment can be reflected. The inside of the stack type temperature inspection system 3 can directly display the corresponding temperature of the resistance value input by the temperature sensor through a temperature conversion algorithm. In addition to taking temperature measurements, the stacked temperature inspection system 23 can calculate display statistics according to the tester requirements, including: mean, standard deviation, maximum, minimum, and distribution, as well as differences between any two channels.
The multi-channel 232 communication box 22 is connected to the automatic verification and calibration software 26, and the constant temperature bath 21, the stacked temperature inspection system 23, and the automatic verification and calibration software 26 are connected to each other through the multi-channel 232 communication box 22. After connection, the temperature value of the thermostatic bath 21 is set, and the temperature value can be set manually or adjusted automatically by setting the automatic verification and calibration software 26. After the temperature of the thermostatic bath 21 is set, the stack type temperature inspection system 23 can receive commands through the communication interface and execute various operations. By using a serial or GPIB interface through the multi-channel 232 communication box, the automatic verification and calibration software 26 can control the stacked temperature inspection system 23 to measure and collect, and read measurement data on the display screen in a polling mode.
The automated verification and calibration software 26 performs a comparative verification and calibration of the standard platinum resistor 24 with the temperature sensor 25 to be tested. Various configuration options for the automated verification and calibration software 26 are set, including channel selection, serial number, temperature range, etc. And (4) entering a detection interface after the configuration is selected, setting the conditions of allowable target deviation and stability, setting the verification time, and starting the detection. And after the data of the sensor to be detected is stable (the variation is 1/3 which is smaller than the test precision) for about 10min, reading and writing the relevant parameters of the standard, reading and calculating the temperature value, the resistance value and the voltage value of the standard and the sensor to be detected, and calibrating to generate the final measurement data in the Excel format.
The operation flow of the detection system is shown in fig. 3, and comprises the following steps:
1. starting the program;
2. selecting a COM port, and selecting a corresponding test COM port according to a test requirement;
3. setting configuration, wherein two options of creating new configuration and opening existing configuration can be selected, and the existing configuration is the configuration saved before;
4. and setting a heat source, selecting a constant temperature tank according to the temperature required by the test, wherein each constant temperature tank has a corresponding model, and simultaneously filling related contents such as a constant temperature tank temperature zone, calibration time and the like.
5. Setting a standard element, wherein the standard element can be selected according to test requirements, and if a standard platinum resistor is selected, filling in latest calibrated data and a selected test temperature zone;
6. setting related contents of a tested element and a temperature sensor to be tested, including the type of the sensor, a temperature point selected for measurement, a test channel and the like;
7. after the setting is finished, the test interface can be entered after the click configuration is finished;
8. entering a test interface to set test conditions, including allowable target deviation value, stability conditions, reading times and the like;
9. starting the test;
10. and judging whether the test is successful or not, if not, re-checking whether the test condition filling is correct or not, and then restarting the test. If the test is successful, continuing the test until the test is stopped;
11. stopping the test, and clicking the data record sheet;
12. judging whether the data record list is generated or not, if not, testing again, and if so, saving the data record list;
13. and (6) ending.
It is visible, the embodiment of the utility model provides a detecting system adopts one-way method of raising the temperature to make temperature sensor obtain short-term test, and whole adjustability control has improved detection efficiency by a wide margin, has effectively promoted detection effect, is fit for popularizing and applying in various relevant type temperature sensor's detection. And further avoids the resulting severe impact on the utility associated with the measured temperature sensor. The safety factor of the rail vehicle is improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (4)
1. A temperature sensor accuracy testing system, comprising: the system comprises a standard platinum resistor, a temperature sensor to be detected, a test constant temperature tank, a stack type temperature inspection module, a multi-channel communication module and a verification calibration controller;
the standard platinum resistor and the temperature sensor to be detected are arranged in the constant temperature bath, the standard platinum resistor and the temperature sensor to be detected are connected with the stacked temperature inspection module, and the stacked temperature inspection module acquires the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected;
the testing constant temperature bath is connected with the stack type temperature inspection module and the verification calibration controller through the multi-channel communication module, and the verification calibration controller determines target calibration data based on the current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected.
2. The temperature sensor accuracy testing system of claim 1, wherein the test thermostat comprises at least one or more of a thermostat oil bath, a thermostat alcohol bath, and a thermostat water bath.
3. The temperature sensor accuracy testing system of claim 1, wherein the stacked temperature patrol module comprises: the system comprises a first controller and at least one functional submodule;
the first controller is connected with the functional sub-module and generates a control signal based on the obtained current resistance value of the standard platinum resistor and the current resistance value of the temperature sensor to be detected;
and the functional sub-module executes corresponding operation based on the control signal.
4. The system for testing the accuracy of a temperature sensor according to claim 1, wherein said multi-channel communication module is a multi-channel 232 communication box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216373.6U CN212391150U (en) | 2020-09-30 | 2020-09-30 | Temperature sensor precision test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022216373.6U CN212391150U (en) | 2020-09-30 | 2020-09-30 | Temperature sensor precision test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212391150U true CN212391150U (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022216373.6U Active CN212391150U (en) | 2020-09-30 | 2020-09-30 | Temperature sensor precision test system |
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| CN (1) | CN212391150U (en) |
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- 2020-09-30 CN CN202022216373.6U patent/CN212391150U/en active Active
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