Operational performance test system for high-precision sensor temperature probes

Abstract

The present invention belongs to the field of probe testing technology, and specifically is an operation performance testing system suitable for a high-precision sensor temperature measuring probe, comprising an accuracy testing module, a repeatability testing module, a variable temperature response testing module, a stability testing module, an operation performance comprehensive evaluation module and a display terminal; the present invention accurately determines the temperature measurement accuracy of the temperature measuring probe through the accuracy testing module, analyzes the repeatability performance of the temperature measuring probe at various temperature points through the repeatability testing module when generating a high-precision temperature measurement signal, reasonably feeds back the variable temperature response efficiency of the temperature measuring probe through the variable temperature response testing module when generating a repeatability qualified signal, and tests and analyzes the temperature measurement stability of the temperature measuring probe under long-term operation through the stability testing module when generating a normal variable temperature response signal, and can comprehensively, efficiently and accurately feed back the operation performance of the high-precision sensor temperature measuring probe, with a high level of automation and intelligence.

Description

Technical Field

[0001] The invention relates to the technical field of probe testing, in particular to an operating performance testing system suitable for a high-precision sensor temperature measuring probe. Background Art

[0002] With the rapid development of science and technology and industry, high-precision sensor temperature probes are increasingly used in various fields, such as aerospace, medical equipment, industrial automation, etc. In the production of high-precision sensor temperature probes, performance testing of high-precision sensor temperature probes is a key link to ensure that they can accurately and stably measure temperature in practical applications;

[0003] At present, when testing high-precision sensor temperature measuring probes, it is difficult to reasonably judge the necessity of testing the corresponding high-precision sensor temperature measuring probes before testing, and when it is judged that performance testing is needed, it is impossible to comprehensively analyze and comprehensively and accurately evaluate the operating performance of the high-precision sensor temperature measuring probes, and the level of intelligence and automation is low;

[0004] In view of the above technical defects, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an operating performance testing system suitable for a high-precision sensor temperature measuring probe, which solves the problems that the prior art is difficult to reasonably judge the necessity of testing the corresponding high-precision sensor temperature measuring probe before testing, and is unable to comprehensively analyze and comprehensively and accurately evaluate the operating performance of the high-precision sensor temperature measuring probe when it is judged that performance testing is needed, and has a low level of intelligence and automation.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The operating performance test system is suitable for high-precision sensor temperature measuring probes, including accuracy test module, repeatability test module, variable temperature response test module, stability test module, operating performance comprehensive evaluation module and display terminal;

[0008] A standard temperature source with a known precise temperature is used as the object to be measured, and the temperature measuring probe is tested several times at multiple temperature points. The accuracy test module determines the temperature measurement accuracy of the temperature measuring probe based on several groups of measurement data at each temperature point, generates a high-precision temperature measurement signal or a low-precision temperature measurement signal through analysis, and sends the high-precision temperature measurement signal to the repeatability test module;

[0009] When the repeatability test module receives the high-precision temperature measurement signal, it analyzes the repeatability performance of the temperature measuring probe at each temperature point, generates a repeatability qualified signal or a repeatability abnormal signal through analysis, and sends the repeatability qualified signal to the variable temperature response test module;

[0010] When the variable temperature response test module receives the repeatability qualified signal, it performs a variable temperature response test on the temperature measuring probe and generates a variable temperature response abnormal signal or a variable temperature response normal signal through analysis, and sends the variable temperature response normal signal to the stability test module;

[0011] When the stability test module receives a normal temperature change response signal, it places the temperature probe in a constant temperature box, sets a specific temperature point, continuously monitors and records the measurement values ​​of the temperature probe within a certain period of time, and draws a temperature trend curve. It performs analysis based on the temperature trend curve to generate a stability qualification signal or a stability abnormality signal. When a low temperature measurement precision signal, an abnormal repeatability signal, an abnormal temperature change response signal, or an abnormal stability signal is generated, the comprehensive operation performance evaluation module generates a performance alarm message and sends the performance alarm message to the display terminal for display.

[0012] Furthermore, the specific analysis process of the accuracy test module includes:

[0013] Collect several groups of temperature measurement values ​​of the temperature measuring probe at the corresponding temperature point, calculate the difference between the corresponding temperature measurement value and the standard temperature value at the corresponding temperature point and take the absolute value to obtain the measurement error value, calculate the average of all the measurement error values ​​at the corresponding temperature point to obtain the measurement difference table value, and mark the measurement error value with the largest value as the measurement difference amplitude, and mark the number ratio of the measurement error values ​​exceeding the preset measurement error threshold as the measurement error ratio;

[0014] The measurement error value is obtained by numerically calculating the measurement difference table value, measurement difference amplitude and measurement anomaly value at the corresponding temperature point, and the measurement error value is numerically compared with the preset measurement error threshold. If the measurement error value exceeds the preset measurement error threshold, the corresponding temperature point is marked as a measurement error-prone point; if a measurement error-prone point exists, a test low-precision signal is generated.

[0015] Furthermore, if there are no measurement errors, the measured error values ​​at all temperature points are summed and averaged to obtain the accuracy decision value, and the accuracy decision value is numerically compared with the preset accuracy decision threshold. If the accuracy decision value exceeds the preset accuracy decision threshold, a test low-precision signal is generated; if the accuracy decision value does not exceed the preset accuracy decision threshold, a test high-precision signal is generated.

[0016] Furthermore, the specific analysis process of the repeatability test module is as follows:

[0017] Collect several groups of temperature measurement values ​​of the temperature measuring probe at corresponding temperature points, calculate the variance of all temperature measurement values ​​at corresponding temperature points to obtain temperature fluctuation values, compare the temperature fluctuation values ​​with the preset temperature fluctuation thresholds, and generate a repetitive abnormal signal if there is a temperature point where the temperature fluctuation value exceeds the preset temperature fluctuation threshold.

[0018] If there is no temperature point where the temperature fluctuation value exceeds the preset temperature fluctuation threshold, the ratio of the temperature fluctuation value at the corresponding temperature point to the preset temperature fluctuation threshold is marked as the temperature fluctuation value; a set of preset influence weight values ​​corresponding to each temperature point is set in advance, and the product of the temperature fluctuation value at the corresponding temperature point and the corresponding preset influence weight value is marked as the temperature fluctuation value;

[0019] The temperature measurement wave anomaly values ​​at all temperature points are summed up to obtain the repeatability decision value, and the repeatability decision value is numerically compared with the preset repeatability decision threshold. If the repeatability decision value exceeds the preset repeatability decision threshold, a repeatability abnormal signal is generated; if the repeatability decision value does not exceed the preset repeatability decision threshold, a repeatability qualified signal is generated.

[0020] Furthermore, the specific test and analysis process of the variable temperature response test module is as follows:

[0021] A rapid temperature change chamber is used as the object to be tested, and the measured value of the temperature probe during the rapid temperature change process is recorded. The time required from the start of the temperature change to the time when the measured value of the temperature probe reaches a stable value is calculated and marked as the temperature change response time. After several groups of temperature change response tests, the average of several groups of temperature change response time is marked as the temperature change response decision value.

[0022] The temperature change response decision value is numerically compared with the preset temperature change response decision threshold. If the temperature change response decision value exceeds the preset temperature change response decision threshold, a temperature change response abnormal signal is generated. If the temperature change response decision value does not exceed the preset temperature change response decision threshold, a temperature change response normal signal is generated.

[0023] Furthermore, the specific analysis process of the stability test module is as follows:

[0024] Obtain the temperature trend curve of the temperature measuring probe, establish a rectangular coordinate system in the first quadrant with time as the X-axis and temperature as the Y-axis, and place the temperature trend curve in the rectangular coordinate system; draw a ray with its endpoint on the Y-axis and parallel to the X-axis in the rectangular coordinate system and mark it as a standard ray, and the Y-axis coordinate of the standard ray represents the temperature of the set specific temperature point;

[0025] The initial point of the temperature trend curve is located on the Y-axis, and the end point of the temperature trend curve is used as the endpoint to draw a line segment perpendicular to the standard ray; all areas enclosed by the temperature trend curve and the standard ray are obtained, and the corresponding areas are marked as deviation areas. The areas of all deviation areas are summed up to obtain the surrounding surface value, and the surrounding surface value is numerically compared with the preset surrounding surface threshold. If the surrounding surface value exceeds the preset surrounding surface threshold, a stability abnormality signal is generated.

[0026] Further, if the surrounding surface value does not exceed the preset surrounding surface threshold, the area of ​​the corresponding deviation region is marked as the zone surface value, the number of zone surface values ​​exceeding the preset zone surface threshold is marked as the out-of-zone number detection value, and the zone surface value with the largest value is marked as the zone amplitude value, and the Y-direction distance between the highest point and the lowest point on the temperature trend curve is marked as the wave distance value;

[0027] The stability decision value is obtained by numerically calculating the surrounding surface value, different-zone detection value, zone amplitude value and wave distance value, and the stability decision value is numerically compared with the preset stability decision threshold. If the stability decision value exceeds the preset stability decision threshold, a stability abnormality signal is generated; if the stability decision value does not exceed the preset stability decision threshold, a stability qualified signal is generated.

[0028] Furthermore, when generating the high-precision temperature measurement signal, the repeatability qualified signal, the variable temperature response normal signal and the stability qualified signal, the operation performance comprehensive evaluation module obtains the accuracy decision value, the repeatability decision value, the variable temperature response decision value and the stability decision value, and numerically calculates the accuracy decision value, the repeatability decision value, the variable temperature response decision value and the stability decision value to obtain the operation performance value;

[0029] The operating performance value is numerically compared with the preset operating performance threshold. If the operating performance value exceeds the preset operating performance threshold, a performance alarm message is generated; if the operating performance value does not exceed the preset operating performance threshold, a performance qualification message is generated, and the performance alarm message or the performance qualification message is sent to the display terminal for display.

[0030] Furthermore, the operation performance comprehensive evaluation module is communicatively connected to the necessity detection and analysis module. Before the operation performance test of the temperature measuring probe is performed, the necessity detection and analysis module collects the surface image of the temperature measuring probe through a camera, and judges whether the size and shape of the temperature measuring probe meet the corresponding requirements based on the surface image. If the size and shape do not meet the corresponding requirements, a non-essential warning signal is generated.

[0031] If the size and shape meet the corresponding requirements, the surface cracks of the temperature measuring probe are identified based on the surface image. If there are surface cracks whose crack length, maximum crack width or maximum crack depth exceeds the corresponding preset threshold, a non-essential warning signal is generated;

[0032] If there is no surface crack whose crack length, maximum crack width or maximum crack depth exceeds the corresponding preset threshold, the temperature measuring probe is divided into a number of rectangular grids, and if the corresponding rectangular grid is covered with dirt or rust, the corresponding rectangular grid is marked as a warning grid;

[0033] The number of warning grids on the temperature measuring probe is obtained and marked as a warning value, and the number of warning grids clustered together is marked as a warning detection value, and the warning detection value with the largest value is marked as a warning amplitude value, and the number of warning detection values ​​exceeding a preset warning detection threshold is marked as a warning deviation value; a warning judgment value is obtained by numerically calculating the warning value, the warning amplitude value and the warning deviation value, and the warning judgment value is numerically compared with the preset warning judgment threshold. If the warning judgment value exceeds the preset warning judgment threshold, a non-essential warning signal is generated;

[0034] The necessity detection and analysis module sends the unnecessary warning signal to the display terminal through the comprehensive evaluation module of operation performance, and the display terminal displays the unnecessary warning signal and issues a warning.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] 1. In the present invention, the temperature measurement accuracy of the temperature measuring probe is accurately judged by the accuracy test module, the repeatability performance of the temperature measuring probe at each temperature point is analyzed by the repeatability test module when generating a high-precision temperature measurement signal, the temperature change response efficiency of the temperature measuring probe is reasonably fed back by the variable temperature response test module when generating a repeatability qualified signal, and the temperature measurement stability of the temperature measuring probe under long-term work is tested and analyzed by the stability test module when generating a normal temperature change response signal, which can comprehensively, efficiently and accurately feed back the operating performance of the high-precision sensor temperature measuring probe, and has a high level of automation and intelligence;

[0037] 2. In the present invention, before conducting an operating performance test of the temperature probe, a surface image of the high-precision sensor temperature probe is collected through a necessity detection and analysis module, and the size and shape, surface crack condition, and surface contamination condition of the temperature probe are gradually and progressively analyzed based on the surface image to accurately judge the product quality. The necessity of the performance test is evaluated based on the quality judgment result, and when an unnecessary warning signal is generated, the tester is reminded not to conduct relevant tests on the corresponding high-precision sensor temperature probe, so as to avoid conducting unnecessary tests and wasting time, manpower and material resources, and facilitate test management. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0039] Figure 1 This is a system block diagram of Embodiment 1 of the present invention;

[0040] Figure 2 This is a system block diagram of Embodiment 2 of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Embodiment 1: Figure 1 As shown, the operating performance test system for a high-precision sensor temperature measuring probe proposed by the present invention includes an accuracy test module, a repeatability test module, a variable temperature response test module, a stability test module, an operating performance comprehensive evaluation module and a display terminal;

[0043] Using a standard temperature source with known precise temperature as the object to be measured, the temperature probe is tested several times at multiple temperature points (such as -20℃, 0℃, 25℃, 50℃, 75℃, 100℃, etc.) (at least ten tests at each temperature point). The accuracy test module determines the temperature measurement accuracy of the temperature probe based on several groups of measurement data at each temperature point, and generates a high-precision temperature measurement signal or a low-precision temperature measurement signal through analysis. It can verify the measurement accuracy of the temperature probe at different temperature points and provide information support for the analysis process of the comprehensive evaluation module of the operating performance, ensuring the comprehensiveness of the analysis and the accuracy of the analysis results. The specific analysis process of the accuracy test module is as follows:

[0044] Collect several groups of temperature measurement values ​​of the temperature measuring probe at the corresponding temperature point, calculate the difference between the corresponding temperature measurement value and the standard temperature value at the corresponding temperature point and take the absolute value to obtain the measurement error value, calculate the average of all the measurement error values ​​at the corresponding temperature point to obtain the measurement difference table value, and mark the measurement error value with the largest value as the measurement difference amplitude, and mark the number ratio of the measurement error values ​​exceeding the preset measurement error threshold as the measurement error ratio;

[0045] The measured difference table value CF, the measured difference amplitude value CW and the measured difference value CZ at the corresponding temperature point are numerically calculated by the formula CP=(hu1*CF+hu2*CW) / 2+hu3*CZ to obtain the measured poor resolution value CP; wherein hu1, hu2 and hu3 are preset proportional coefficients, hu3>hu1>hu2>0; and the larger the value of the measured poor resolution value CP is, the worse the measurement accuracy of the temperature measuring probe for the corresponding temperature point is;

[0046] The measurement poor analysis value CP is numerically compared with the preset measurement poor analysis threshold. If the measurement poor analysis value CP exceeds the preset measurement poor analysis threshold, it indicates that the measurement accuracy of the temperature measuring probe for the corresponding temperature point is poor, and the corresponding temperature point is marked as a measurement error-prone point; if there is a measurement error-prone point, it indicates that the measurement performance of the temperature measuring probe is poor, and a test low-precision signal is generated;

[0047] If there is no measurement error point, the measurement error values ​​at all temperature points are summed and averaged to obtain the accuracy decision value, and the accuracy decision value is numerically compared with the preset accuracy decision threshold. If the accuracy decision value exceeds the preset accuracy decision threshold, it indicates that the measurement accuracy of the temperature measuring probe is generally poor, and a test low-precision signal is generated; if the accuracy decision value does not exceed the preset accuracy decision threshold, it indicates that the measurement accuracy of the temperature measuring probe is generally good, and a test high-precision signal is generated.

[0048] The accuracy test module sends the high-precision temperature measurement signal to the repeatability test module. When the repeatability test module receives the high-precision temperature measurement signal, it analyzes the repeatability performance of the temperature probe at each temperature point, and generates a repeatability qualified signal or a repeatability abnormal signal through analysis. It can verify the repeatability of the temperature probe when measuring the same temperature multiple times, and provide information support for the analysis process of the comprehensive evaluation module of the operating performance, thereby ensuring the comprehensiveness of its analysis and the accuracy of the analysis results; the specific analysis process of the repeatability test module is as follows:

[0049] Collect several groups of temperature measurement values ​​of the temperature measuring probe at corresponding temperature points, calculate the variance of all temperature measurement values ​​at corresponding temperature points to obtain temperature measurement fluctuation values, wherein the larger the value of the temperature measurement fluctuation value, the worse the consistency of the temperature measurement result of the temperature measuring probe for the corresponding temperature point, compare the temperature measurement fluctuation value with the corresponding preset temperature measurement fluctuation threshold, if there is a temperature point where the temperature measurement fluctuation value exceeds the corresponding preset temperature measurement fluctuation threshold, indicating that the repeatability of the temperature measurement result of the temperature measuring probe is poor, then generate a repeatability abnormal signal;

[0050] If there is no temperature point where the temperature fluctuation value exceeds the preset temperature fluctuation threshold, the ratio of the temperature fluctuation value at the corresponding temperature point to the corresponding preset temperature fluctuation threshold is marked as the temperature fluctuation value; a set of preset influence weight values ​​corresponding to each temperature point is set in advance, wherein the values ​​of the preset influence weight values ​​are all positive numbers, and the more important the measurement of the corresponding temperature point is, the larger the value of the preset influence weight value matching it is; the product of the temperature fluctuation value at the corresponding temperature point and the corresponding preset influence weight value is marked as the temperature fluctuation value;

[0051] The temperature measurement wave anomaly values ​​at all temperature points are summed up to obtain the repeatability decision value, and the repeatability decision value is numerically compared with the preset repeatability decision threshold. If the repeatability decision value exceeds the preset repeatability decision threshold, it indicates that the repeatability performance of the temperature measurement result of the temperature measuring probe is generally poor, and a repeatability abnormal signal is generated; if the repeatability decision value does not exceed the preset repeatability decision threshold, it indicates that the repeatability performance of the temperature measurement result of the temperature measuring probe is generally good, and a repeatability qualified signal is generated.

[0052] The repeatability test module sends the repeatability qualified signal to the variable temperature response test module. When the variable temperature response test module receives the repeatability qualified signal, it performs a variable temperature response test on the temperature measuring probe and generates a variable temperature response abnormal signal or a variable temperature response normal signal through analysis. It can reasonably feedback the variable temperature response efficiency of the temperature measuring probe and provide information support for the analysis process of the comprehensive evaluation module of the operating performance, ensuring the comprehensiveness of its analysis and the accuracy of the analysis results. The specific test and analysis process of the variable temperature response test module is as follows:

[0053] A rapid temperature change chamber is used as the object to be measured, and the measured value of the temperature measuring probe during the rapid temperature change process is recorded. The time required from the start of the temperature change to the time when the measured value of the temperature measuring probe reaches a stable value is calculated and marked as the temperature change response time. After several groups of temperature change response tests, the average of several groups of temperature change response time is marked as the temperature change response decision value. The larger the value of the temperature change response decision value is, the slower the measurement response of the temperature measuring probe is when the temperature changes.

[0054] The variable temperature response decision value is numerically compared with the preset variable temperature response decision threshold. If the variable temperature response decision value exceeds the preset variable temperature response decision threshold, it indicates that the measurement response of the temperature measuring probe is relatively slow in general when the temperature changes, and a variable temperature response abnormal signal is generated. If the variable temperature response decision value does not exceed the preset variable temperature response decision threshold, it indicates that the measurement response of the temperature measuring probe is relatively fast in general when the temperature changes, and a normal temperature response signal is generated.

[0055] The variable temperature response test module sends a normal variable temperature response signal to the stability test module. When the stability test module receives the normal variable temperature response signal, the temperature measuring probe is placed in a constant temperature box, a specific temperature point is set (preferably, the specific temperature point is 25°C), and the measurement value of the temperature measuring probe within a certain period of time (preferably, not less than four hours) is continuously monitored and recorded, and a temperature trend curve is drawn;

[0056] Based on the temperature trend curve, the analysis is performed to generate a qualified stability signal or an abnormal stability signal, which can effectively evaluate the temperature measurement stability of the temperature measuring probe under long-term operation, and provide information support for the analysis process of the comprehensive evaluation module of the operating performance, further ensuring the comprehensiveness of the analysis and the accuracy of the analysis results; the specific analysis process of the stability test module is as follows:

[0057] Obtain the temperature trend curve of the temperature measuring probe, establish a rectangular coordinate system in the first quadrant with time as the X-axis and temperature as the Y-axis, and place the temperature trend curve in the rectangular coordinate system; draw a ray with its endpoint on the Y-axis and parallel to the X-axis in the rectangular coordinate system and mark it as a standard ray, and the Y-axis coordinate of the standard ray represents the temperature of the set specific temperature point;

[0058] The initial point of the temperature trend curve is located on the Y-axis, and a line segment perpendicular to the standard ray is drawn with the end point of the temperature trend curve as the endpoint; all areas enclosed by the temperature trend curve and the standard ray are obtained, and the corresponding areas are marked as deviation areas. The areas of all deviation areas are summed up to obtain the surrounding surface value, and the surrounding surface value is numerically compared with the preset surrounding surface threshold. If the surrounding surface value exceeds the preset surrounding surface threshold, it indicates that the measurement stability of the temperature measuring probe is poor, and a stability abnormality signal is generated.

[0059] Further, if the surrounding surface value does not exceed the preset surrounding surface threshold, the area of ​​the corresponding deviation region is marked as the zone surface value, the zone surface value is numerically compared with the preset zone surface threshold, and the number of zone surface values ​​exceeding the preset zone surface threshold is marked as the different zone number detection value, and the zone surface value with the largest value is marked as the zone amplitude, and the Y-direction distance between the highest point and the lowest point on the temperature trend curve is marked as the wave distance value;

[0060] By formula The surrounding surface value NF, the different zone number detection value NP, the zone amplitude NF and the wave distance value NK are numerically calculated to obtain the stability decision value NX; wherein ew1, ew2, ew3 and ew4 are preset proportional coefficients, ew2>ew4>ew3>ew1>0; and the larger the value of the stability decision value NX is, the worse the temperature measurement stability performance of the temperature measuring probe is in general;

[0061] The stability decision value NX is numerically compared with the preset stability decision threshold. If the stability decision value NX exceeds the preset stability decision threshold, it indicates that the temperature measurement stability performance of the temperature measuring probe is generally poor, and a stability abnormality signal is generated; if the stability decision value NX does not exceed the preset stability decision threshold, it indicates that the temperature measurement stability performance of the temperature measuring probe is generally good, and a stability qualified signal is generated.

[0062] When a low temperature measurement precision signal, an abnormal repeatability signal, an abnormal temperature change response signal, or an abnormal stability signal is generated, it indicates that the operating performance of the temperature measuring probe is poor, and the operating performance comprehensive evaluation module generates a performance alarm message;

[0063] When generating high-precision temperature measurement signals, repeatability qualified signals, variable temperature response normal signals and stability qualified signals, the operation performance comprehensive evaluation module obtains accuracy decision values, repeatability decision values, variable temperature response decision values ​​and stability decision values;

[0064] The accuracy decision value QR, the repeatability decision value QF, the variable temperature response decision value QP and the stability decision value NX are numerically calculated by the formula QW=(b1*QR+b2*QF+b3*QP+b4*NX) / 4 to obtain the operation performance value QW; wherein b1, b2, b3, and b4 are preset proportional coefficients with values ​​greater than zero, and the larger the value of the operation performance value QW is, the worse the overall operation performance of the temperature measuring probe is;

[0065] Compare the running performance value QW with the preset running performance threshold. If the running performance value QW exceeds the preset running performance threshold, it indicates that the running performance of the temperature measuring probe is generally poor, and a performance alarm message is generated.

[0066] If the operating performance value QW does not exceed the preset operating performance threshold, performance qualification information is generated, indicating that the operating performance of the temperature measuring probe is generally good, and the performance alarm information or performance qualification information is sent to the display terminal for display. It can comprehensively, efficiently and accurately test the operating performance of the high-precision sensor temperature measuring probe and provide timely feedback, with a high level of automation and intelligence.

[0067] Embodiment 2: Figure 2 As shown, the difference between this embodiment and the first embodiment is that the operation performance comprehensive evaluation module is communicatively connected to the necessity detection and analysis module. Before the operation performance test of the temperature measuring probe is performed, the necessity detection and analysis module collects the surface image of the temperature measuring probe through the camera, and judges whether the size and shape of the temperature measuring probe meet the corresponding requirements based on the surface image. If the size and shape do not meet the corresponding requirements, it indicates that the product appearance of the corresponding high-precision sensor temperature measuring probe does not meet the requirements, that is, the quality of the product is poor, and it is not necessary to perform a performance test on it, and a non-essential warning signal is generated;

[0068] If the size and shape meet the corresponding requirements, the surface cracks of the temperature measuring probe are identified based on the surface image. If there are surface cracks, the crack length, maximum crack width and maximum crack depth of the corresponding surface cracks are collected, and the crack length, maximum crack width and maximum crack depth are numerically compared with the corresponding preset thresholds. If there are surface cracks whose crack length, maximum crack width or maximum crack depth exceeds the corresponding preset threshold, it indicates that the surface damage defect of the corresponding high-precision sensor temperature measuring probe is serious, the quality of the product is poor, and there is no need to perform performance testing on it, then a non-essential warning signal is generated;

[0069] If there is no surface crack whose crack length, maximum crack width or maximum crack depth exceeds the corresponding preset threshold, the temperature measuring probe is divided into several rectangular grids. If the corresponding rectangular grid is covered with dirt or rust, it indicates that the corresponding rectangular grid is seriously polluted, which has an adverse effect on the quality of the product, and the corresponding rectangular grid is marked as a warning grid;

[0070] The number of warning grids on the temperature measuring probe is obtained and marked as a warning value, and the number of warning grids clustered together is marked as a warning detection value, and the warning detection value with the largest value is marked as a warning amplitude value, and the warning detection value is numerically compared with a preset warning detection threshold, and the number of warning detection values ​​exceeding the preset warning detection threshold is marked as a warning abnormal value;

[0071] The warning condition value SM, the warning amplitude value SF and the warning difference value SW are numerically calculated by the formula SK=(uw1*SM+uw2*SF) / 2+uw3*SW to obtain the warning judgment value SK; wherein, uw1, uw2, and uw3 are preset proportional coefficients, and uw3>uw2>uw1>0; and, the larger the value of the warning judgment value SK is, the more serious the surface contamination of the corresponding high-precision sensor temperature measuring probe is, the greater the adverse impact on its product quality is, and the less necessary it is to conduct performance testing on it;

[0072] The warning judgment value SK is numerically compared with the preset warning judgment threshold. If the warning judgment value SK exceeds the preset warning judgment threshold, it indicates that the surface contamination of the corresponding high-precision sensor temperature probe is serious, which has a great adverse impact on its product quality. There is no need to perform performance testing on it, and an unnecessary warning signal is generated.

[0073] Furthermore, the necessity detection and analysis module sends the unnecessary warning signal to the display terminal through the comprehensive operation performance evaluation module. The display terminal displays the unnecessary warning signal and issues a warning to remind the test personnel not to conduct relevant tests on the corresponding high-precision sensor temperature measuring probe for the time being, and to take improvement measures or directly scrap the corresponding high-precision sensor temperature measuring probe as needed to avoid unnecessary testing and waste of time, manpower and material resources, thereby facilitating test management.

[0074] The working principle of the present invention is as follows: when in use, the temperature measurement accuracy of the temperature measuring probe is judged based on several groups of measurement data at various temperature points through the accuracy testing module; when generating a high-precision temperature measurement signal, the repeatability performance of the temperature measuring probe at various temperature points is analyzed through the repeatability testing module to evaluate the consistency of its measurement results; when generating a repeatability qualified signal, the temperature measuring probe is subjected to a temperature variation response test through the variable temperature response testing module to reasonably provide feedback on its temperature variation response efficiency; when generating a normal temperature variation response signal, the temperature measurement stability of the temperature measuring probe under long-term operation is tested and analyzed through the stability testing module; the comprehensive operating performance evaluation module comprehensively evaluates the operating performance of the high-precision sensor temperature measuring probe based on the accuracy analysis results, the repeatability analysis results, the temperature variation response analysis results and the stability analysis results; and can comprehensively, efficiently and accurately provide feedback on the operating performance of the high-precision sensor temperature measuring probe, with a high level of automation and intelligence.

[0075] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. Applicable to the operation performance test system of high-precision sensor temperature probe, characterized in that: It includes accuracy test module, repeatability test module, variable temperature response test module, stability test module, operation performance comprehensive evaluation module and display terminal; A standard temperature source with a known precise temperature is used as the object to be measured, and the temperature measuring probe is tested several times at multiple temperature points. The accuracy test module determines the temperature measurement accuracy of the temperature measuring probe based on several groups of measurement data at each temperature point, generates a high-precision temperature measurement signal or a low-precision temperature measurement signal through analysis, and sends the high-precision temperature measurement signal to the repeatability test module; When the repeatability test module receives the high-precision temperature measurement signal, it analyzes the repeatability performance of the temperature measuring probe at each temperature point, generates a repeatability qualified signal or a repeatability abnormal signal through analysis, and sends the repeatability qualified signal to the variable temperature response test module; When the variable temperature response test module receives the repeatability qualified signal, it performs a variable temperature response test on the temperature measuring probe and generates a variable temperature response abnormal signal or a variable temperature response normal signal through analysis, and sends the variable temperature response normal signal to the stability test module; When the stability test module receives a normal temperature change response signal, it places the temperature probe in a constant temperature box, sets a specific temperature point, continuously monitors and records the measurement values ​​of the temperature probe within a certain period of time, and draws a temperature trend curve. It performs analysis based on the temperature trend curve to generate a stability qualification signal or a stability abnormality signal. When a low temperature measurement precision signal, an abnormal repeatability signal, an abnormal temperature change response signal, or an abnormal stability signal is generated, the comprehensive operation performance evaluation module generates a performance alarm message and sends the performance alarm message to the display terminal for display.

2. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 1 is characterized in that: The specific analysis process of the accuracy test module includes: Collect several groups of temperature measurement values ​​of the temperature measuring probe at the corresponding temperature point, calculate the difference between the corresponding temperature measurement value and the standard temperature value at the corresponding temperature point and take the absolute value to obtain the measurement error value, calculate the average of all the measurement error values ​​at the corresponding temperature point to obtain the measurement difference table value, and mark the measurement error value with the largest value as the measurement difference amplitude, and mark the number ratio of the measurement error values ​​exceeding the preset measurement error threshold as the measurement error ratio; The measurement error value is obtained by numerically calculating the measurement difference table value, measurement difference amplitude and measurement anomaly value at the corresponding temperature point, and the measurement error value is numerically compared with the preset measurement error threshold. If the measurement error value exceeds the preset measurement error threshold, the corresponding temperature point is marked as a measurement error-prone point; if a measurement error-prone point exists, a test low-precision signal is generated.

3. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 2 is characterized in that: If there is no measurement error point, the measurement error values ​​at all temperature points are summed and averaged to obtain the accuracy decision value. If the accuracy decision value exceeds the preset accuracy decision threshold, a test low precision signal is generated. If the accuracy decision value does not exceed the preset accuracy decision threshold, a test high-precision signal is generated.

4. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 1, characterized in that: The specific analysis process of the repeatability test module is as follows: Collect several groups of temperature measurement values ​​of the temperature measuring probe at corresponding temperature points, calculate the variance of all temperature measurement values ​​at corresponding temperature points to obtain temperature fluctuation values, compare the temperature fluctuation values ​​with the preset temperature fluctuation thresholds, and generate a repetitive abnormal signal if there is a temperature point where the temperature fluctuation value exceeds the preset temperature fluctuation threshold. If there is no temperature point where the temperature fluctuation value exceeds the preset temperature fluctuation threshold, the ratio of the temperature fluctuation value at the corresponding temperature point to the preset temperature fluctuation threshold is marked as the temperature fluctuation value; a set of preset influence weight values ​​corresponding to each temperature point is set in advance, and the product of the temperature fluctuation value at the corresponding temperature point and the corresponding preset influence weight value is marked as the temperature fluctuation value; The temperature measurement wave anomaly values ​​at all temperature points are summed up to obtain the repeatability decision value, and the repeatability decision value is numerically compared with the preset repeatability decision threshold. If the repeatability decision value exceeds the preset repeatability decision threshold, a repeatability abnormal signal is generated; if the repeatability decision value does not exceed the preset repeatability decision threshold, a repeatability qualified signal is generated.

5. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 1, characterized in that: The specific test and analysis process of the variable temperature response test module is as follows: Use a rapid temperature change box as the object to be measured, record the measured value of the temperature probe during the rapid temperature change process, calculate the time required from the start of temperature change to the time when the measured value of the temperature probe reaches a stable value and mark it as the temperature change response time; The average of several groups of temperature change response time is marked as the temperature change response decision value. If the temperature change response decision value exceeds the preset temperature change response decision threshold, a temperature change response abnormal signal is generated. If the temperature change response decision value does not exceed the preset temperature change response decision threshold, a temperature change response normal signal is generated.

6. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 1, characterized in that: The specific analysis process of the stability test module is as follows: Obtain the temperature trend curve of the temperature measuring probe, establish a rectangular coordinate system in the first quadrant with time as the X-axis and temperature as the Y-axis, and place the temperature trend curve in the rectangular coordinate system; In a rectangular coordinate system, a ray with its endpoint on the Y axis and parallel to the X axis is drawn and marked as a standard ray, and the Y axis coordinate of the standard ray represents the temperature of the set specific temperature point; The initial point of the temperature trend curve is located on the Y axis, and the end point of the temperature trend curve is used as the endpoint to draw a line segment perpendicular to the standard ray; All areas enclosed by the temperature trend curve and the standard ray are obtained, and the corresponding areas are marked as deviation areas. The areas of all deviation areas are summed up to obtain the surrounding surface value. If the surrounding surface value exceeds the preset surrounding surface threshold, a stability abnormality signal is generated.

7. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 6, characterized in that: If the surrounding surface value does not exceed the preset surrounding surface threshold, the area of ​​the corresponding deviation region is marked as the zone surface value, the number of zone surface values ​​exceeding the preset zone surface threshold is marked as the out-of-zone number detection value, and the zone surface value with the largest value is marked as the zone amplitude, and the Y-direction distance between the highest point and the lowest point on the temperature trend curve is marked as the wave distance value; The stability decision value is obtained by numerically calculating the perimeter value, the different-area detection value, the area amplitude value and the wave distance value, and the stability decision value is numerically compared with the preset stability decision threshold value. If the stability decision value exceeds the preset stability decision threshold value, a stability abnormality signal is generated; If the stability decision value does not exceed the preset stability decision threshold, a stability qualified signal is generated.

8. The operating performance test system suitable for a high-precision sensor temperature measuring probe according to claim 1, characterized in that: When generating high-precision temperature measurement signals, repeatability qualified signals, variable temperature response normal signals and stability qualified signals, the operation performance comprehensive evaluation module numerically calculates the accuracy decision value, repeatability decision value, variable temperature response decision value and stability decision value to obtain the operation performance value. If the operation performance value exceeds the preset operation performance threshold, a performance alarm message is generated; If the running performance value does not exceed the preset running performance threshold, performance qualification information is generated.

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