Physical stress measuring device and measuring method

Abstract

The invention discloses a physical stress measurement device and method, and relates to the technical field of stress measurement, the physical stress measurement device comprises a data acquisition end, a data tracking end and a deviation correction end, the data acquisition end is used for selecting a measured object and setting a physical stress measurement model of the measured object; the data tracking end is used for receiving data in real time, carrying out data cleaning and carrying out stress prediction on the physical stress at the current moment, and the deviation correction end is used for carrying out stress prediction on the physical stress at the current moment by monitoring a physical stress measurement value at the current moment in real time. The measurement angle is automatically corrected in real time, and the accuracy of physical stress measurement is ensured. According to the physical stress measurement device and the measurement method, data of a stress measurement result can be predicted in advance, the stress measurement angle is changed in real time through angle step adjustment, and the feasibility, the safety and the reliability of measurement before physical materials are manufactured are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stress measurement, and in particular to a physical stress measurement device and a measurement method. Background Art

[0002] Physical stress measurement systems are used to determine the internal stress distribution of an object under stress in order to evaluate its structural safety, optimize the design and prevent potential structural failure. Modern physical stress measurement systems can achieve real-time monitoring and calculation, such as the XTDIC three-dimensional full-field strain measurement system, which can calculate three-dimensional full-field strain while acquiring images and supports both online and offline processing modes. This real-time performance is particularly important for structural analysis under dynamic loads.

[0003] With the rapid development of science and technology, although modern physical stress measurement systems can realize real-time monitoring and calculation, there are some shortcomings: 1. During real-time monitoring and calculation, the evaluation of physical stress measurement lacks comprehensive analysis, and it is impossible to monitor the trend of multi-parameter changes in real time, which makes physical stress measurement prone to errors and reduces the accuracy of physical stress measurement; 2. After tracking the trend of multi-parameter changes, it is impossible to predict the measurement results of physical stress in advance, so that there is a fixed value determination of physical stress in the measurement, resulting in the measurement of physical stress can only monitor the data and calculation at the current moment in real time, which makes the physical stress measurement limited; 3. When it is monitored that there is a deviation in the physical stress measurement value or the three-dimensional full-field measurement angle deviates, the measurement angle cannot be adjusted in real time, which further causes errors in the measurement of physical stress, affecting the feasibility and safety and reliability of measurement before physical material production.

[0004] Therefore, a physical stress measurement device and a measurement method are proposed to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a physical stress measurement device and a measurement method to solve the problems raised in the above background.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a physical stress measurement device and a measurement method, including a data acquisition end, a data tracking end and a deviation correction end;

[0007] The data acquisition end is used to select a measurement object, set a physical stress measurement model for the measurement object, perform pressure stretching on the measurement object, monitor multiple physical stress parameters of the measurement object in real time, compare and comprehensively analyze the multiple physical stress parameters in real time, and detect and track the multiple parameter values ​​of the physical stress at the current moment in real time, automatically extract abnormal stress parameter values, and ensure the authenticity of the stress measurement object parameters;

[0008] The data tracking end is used to receive data in real time and perform data cleaning, then perform stress prediction on the physical stress at the current moment, and perform real-time tracking of the measurement results according to the stress prediction results at the current moment, and detect whether there is a deviation in real time during tracking. If there is a deviation, a stress measurement deviation warning is issued in real time and the stress value is adjusted;

[0009] The deviation correction end is used to monitor the physical stress measurement value at the current moment in real time and to track the three-dimensional full-field measurement angle in real time. When it is detected that the physical stress measurement value has a deviation or the three-dimensional full-field measurement angle has a deviation, the stress measurement angle is changed in real time through a step-by-step adjustment of the angle, and the measurement angle is automatically corrected in real time to ensure the accuracy of the physical stress measurement.

[0010] The data acquisition terminal includes a data acquisition module, a measurement model module and an abnormality tracking module;

[0011] The data acquisition module includes a measurement mode unit and a multi-parameter acquisition unit;

[0012] The measurement mode unit is used to set the measurement object and adjust the parameters of the physical stress measurement mode according to the measurement object;

[0013] The multi-parameter acquisition unit is used to perform pressure stretching on the measured object and monitor the physical stress multi-parameters of the measured object in real time. The multi-parameters include stress, warpage and curvature radius parameters. The calculation formula is as follows:

[0014] Stress calculation formula: σ = E·ε, where σ represents the stress of the object being measured at the current moment, ε represents the elastic strain value of the object being measured at the current moment, and E is the elastic modulus or Young's modulus of the material, which is a constant;

[0015] Warpage calculation formula: Warpage (%) = (H{max}-H{min}) / T×100%, where H{max} represents the maximum warpage value of the measured object, H{min} represents the minimum warpage value of the measured object, and T represents the corresponding time;

[0016] The calculation formula of the curvature radius is: the curve of the measured object is described by the function y=f(x), that is, any point on the curve is represented by P(x,y), then the curvature radius is: Where dy / dx is the first derivative of the function y=f(x), which represents the slope of the curve at point P; d 2 y / dx 2 It is the second-order derivative of the function y=f(x), which represents the curvature K of the curve at point P.

[0017] The measurement model module includes a stress standard model and a parameter comparison unit;

[0018] The stress standard model is used to set a standard measurement parameter model for physical stress. The set standard measurement parameter model is to set corresponding standard measurement parameter values ​​for multiple parameters of physical stress measurement respectively. The standard measurement parameter values ​​include stress standard value, warpage standard value and curvature radius parameter standard value.

[0019] The parameter comparison unit is used to compare the calculated multiple parameters with the parameters in the standard measurement parameter model one by one. After the difference calculation, if -0.02≤difference≤0.02, the parameter is judged to be normal; if the difference is <-0.02 or the difference is >0.02, the parameter is judged to be abnormal.

[0020] The anomaly tracking module includes a multi-parameter detection unit and an anomaly extraction unit;

[0021] The multi-parameter detection unit is used to track the multi-parameter values ​​of the measured object measured at the current moment in real time through a data tracker and a timer;

[0022] The abnormality extraction unit is used to arrange the abnormal data in sequence in real time according to the comparison result of the parameter comparison unit, and to remove the abnormal data of the corresponding channel in real time through the sensor.

[0023] The data tracking terminal includes a data receiving module, a tracking prediction module and a result self-tracking module;

[0024] The data receiving module includes a data receiving unit and a data cleaning unit;

[0025] The data receiving unit is used to receive the physical stress measurement values ​​at the current moment and the historical moment in real time through the data receiver;

[0026] The data cleaning unit is used to clean the received data in real time through data cleaning.

[0027] The tracking prediction module includes a stress prediction unit, a prediction cycle unit and a prediction display unit;

[0028] The stress prediction unit is used to predict the physical stress measurement result according to the stress parameter at the current moment, and the prediction method is as follows:

[0029] The stress parameter at the corresponding time is calculated with the stress standard parameter. If the difference is equal to ±0.01, the measurement result is judged to be within the normal value. If the difference is greater than 0.01 or less than -0.01, the measurement result is judged to be within the abnormal range, and a measurement warning is issued. One hour is counted as one cycle. The measurement result at the corresponding time of the next cycle is predicted based on the stress parameters of three cycles. If the average values ​​of the stress parameters of the three cycles all exceed the stress standard parameters, the measurement result at the corresponding time is judged to be within the abnormal range, and an abnormal warning message is issued;

[0030] The prediction cycle unit is used to set one hour as a cycle, and the prediction cycle is the same as the set cycle;

[0031] The prediction display unit is used to display the predicted physical stress measurement result value in real time through a display screen.

[0032] The result self-tracking module includes a measurement result unit and a tracking and early warning unit;

[0033] The measurement result unit is used to track the real result of physical stress measurement in real time through a data tracker;

[0034] The tracking and early warning unit is used to calculate the difference between the actual result and the predicted result. If the difference = 0, the prediction is judged to be valid. If the difference ≠ 0, the prediction is judged to be invalid and a secondary prediction is continued.

[0035] The deviation correction end includes a three-dimensional determination module, a three-dimensional detection module, an error order classification module and a correction tracking module;

[0036] The three-dimensional determination module is used to set the three-dimensional angle of measurement of physical stress of the measurement object;

[0037] The three-dimensional detection module includes an angle calculation unit, which is used to calculate the measured three-dimensional angle of physical stress in real time. The calculation steps are as follows:

[0038] Step 1: Set the center point of the physical stress measurement camera as the origin, establish the coordinate system Δz, and calculate the three-dimensional measurement movement distance using the calculation formula:

[0039]

[0040] Wherein, Δx, Δy and Δz collectively represent the three-dimensional coordinate system for physical stress measurement, α is the angle between the three-dimensional moving distance and the positive direction of the X-axis, θ is the angle between the three-dimensional moving distance and the positive direction of the Y-axis, A is the height of the object to be measured, Δx is the vector of the object to be measured in the X-axis direction, that is, the distance between the object to be measured and Δz in the X-axis direction, Δy is the vector of the object to be measured in the Y-axis direction, that is, the distance between the object to be measured and Δz in the Y-axis direction;

[0041] Step 2: Compare the calculated Δx and Δy of the three-dimensional measurement angle movement of the object to be measured with the touch screen movement distance, and set the standard displacement values ​​to O and M. If Δx-O≥1 and Δy-M≥1, it is judged that the three-dimensional measurement angle of the object to be measured is abnormal. If not, it is judged that the angle of the three-dimensional measurement angle movement of the object to be measured is normal.

[0042] The error order classification module includes an angle correction unit, which is used to automatically correct the angle according to the calculated angle deviation value;

[0043] The correction tracking module includes a correction self-tracking unit, which is used to track the corrected three-dimensional measurement angle at the current moment in real time through a data tracker, and calculate the difference between the three-dimensional measurement angles before and after the correction. If the difference = 0, it is judged that the angle correction is abnormal and the correction continues. If the difference ≠ 0, it is judged that the angle correction is normal.

[0044] A method for measuring physical stress comprises the following steps:

[0045] Step 1: Configure the IP address information of the stress measurement remote control area server;

[0046] Step 2: Enter the data acquisition terminal, monitor the changing trends of multiple parameters of physical stress in real time, judge parameter abnormalities, and analyze and evaluate the changing trends in real time to ensure the comprehensiveness of physical stress measurement data;

[0047] Step 3: Enter the data tracking terminal, and based on the comprehensive analysis results, track the change trends of multiple parameters in real time, predict the measurement results of physical stress in advance, so that the measurement results of physical stress can be changed in real time and the measurement results of physical stress can be predicted in advance;

[0048] Step 4: Enter the deviation correction end. When the prediction result is normal, the measurement status of physical stress is monitored in real time, and the result value of physical stress is predicted in real time. When the prediction result is abnormal, it means that the monitored physical stress measurement value has deviation or the three-dimensional full-field measurement angle has deviation. Then, the measurement angle is adjusted in real time according to the deviation value to ensure the safety and reliability of physical stress measurement.

[0049] The present invention has the following beneficial effects:

[0050] 1. In the present invention, by setting a data acquisition terminal, when measuring physical stress, by selecting a measurement object, real-time comparison and comprehensive analysis of multiple parameters of physical stress, and real-time detection and tracking of multi-parameter values ​​of physical stress at the current moment, abnormal stress parameter values ​​are automatically extracted, so that the evaluation of physical stress measurement can be multi-parameter comprehensive analysis, and by real-time monitoring of the current moment values ​​of multiple parameters, errors in physical stress measurement are avoided, thereby increasing the accuracy of physical stress measurement data extraction.

[0051] 2. In the present invention, by setting a data tracking terminal, when measuring physical stress, after tracking the trend of multi-parameter changes, by receiving data in real time and performing data cleaning, and then performing stress prediction on the physical stress at the current moment, the measurement result of the physical stress can be predicted in advance, so that the stress value can be adjusted in real time during the measurement of the physical stress. The measurement of physical stress can predict the data of the stress measurement result in advance, so that the limitation of the physical stress measurement is reduced.

[0052] 3. In the present invention, by setting a deviation correction end, when measuring physical stress, the physical stress measurement value at the current moment is monitored in real time, and the three-dimensional full-field measurement angle is tracked in real time. When it is monitored that the physical stress measurement value has a deviation or the three-dimensional full-field measurement angle deviates, the stress measurement angle is changed in real time through the step-by-step adjustment of the angle, so that the error in the measurement of physical stress is reduced, and the feasibility and safety and reliability of the measurement before the physical material is produced are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A schematic diagram of the system architecture of a physical stress measurement device and a measurement method of the present invention;

[0054] Figure 2 A schematic diagram of the structure of a data acquisition end of a physical stress measurement device and a measurement method of the present invention;

[0055] Figure 3 A schematic diagram of the structure of a data tracking end of a physical stress measurement device and a measurement method of the present invention;

[0056] Figure 4 The present invention is a schematic diagram of the structure of a deviation correction end of a physical stress measurement device and a measurement method. DETAILED DESCRIPTION

[0057] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0058] Embodiment 1

[0059] Please refer to Figure 1 to Figure 2 As shown: A physical stress measurement device and a measurement method, including a data acquisition end, a data tracking end and a deviation correction end;

[0060] The data acquisition end is used to select the object to be measured, set the physical stress measurement model of the object to be measured, perform pressure stretching on the object to be measured, monitor the physical stress multi-parameters of the object to be measured in real time, compare and comprehensively analyze the physical stress multi-parameters in real time, detect and track the multi-parameter values ​​of the physical stress at the current moment in real time, automatically extract abnormal stress parameter values, and ensure the authenticity of the stress measurement object parameters;

[0061] The data tracking terminal is used to receive data in real time and perform data cleaning, then predict the physical stress at the current moment, and track the measurement results in real time based on the stress prediction results at the current moment. During the tracking, it detects whether there is a deviation in real time. If there is a deviation, it issues a stress measurement deviation warning in real time and adjusts the stress value;

[0062] The deviation correction end is used to monitor the physical stress measurement value at the current moment in real time and to track the three-dimensional full-field measurement angle in real time. When it is detected that the physical stress measurement value is biased or the three-dimensional full-field measurement angle is deviated, the stress measurement angle is changed in real time through step-by-step adjustment of the angle, and the measurement angle is automatically corrected in real time to ensure the accuracy of the physical stress measurement.

[0063] The data collection end includes a data collection module, a measurement model module, and an abnormality tracking module;

[0064] The data acquisition module includes a measurement mode unit and a multi-parameter acquisition unit;

[0065] The measurement mode unit is used to set the measurement object and adjust the parameters of the physical stress measurement mode according to the measurement object;

[0066] The multi-parameter acquisition unit is used to perform pressure stretching on the measured object and monitor the physical stress multi-parameters of the measured object in real time. The multi-parameters include stress, warpage and curvature radius parameters. The calculation formula is as follows:

[0067] Stress calculation formula: σ = E·ε, where σ represents the stress of the object being measured at the current moment, ε represents the elastic strain value of the object being measured at the current moment, and E is the elastic modulus or Young's modulus of the material, which is a constant;

[0068] Warpage calculation formula: Warpage (%) = (H{max}-H{min}) / T×100%, where H{max} represents the maximum warpage value of the measured object, H{min} represents the minimum warpage value of the measured object, and T represents the corresponding time;

[0069] The calculation formula of the curvature radius is: the curve of the measured object is described by the function y=f(x), that is, any point on the curve is represented by P(x,y), then the curvature radius is: Where dy / dx is the first derivative of the function y=f(x), which represents the slope of the curve at point P; d 2 y / dx 2 It is the second-order derivative of the function y=f(x), which represents the curvature K of the curve at point P.

[0070] The measurement model module includes a stress standard model and a parameter comparison unit;

[0071] The stress standard model is used to set the standard measurement parameter model of physical stress. The set standard measurement parameter model is to set the corresponding standard measurement parameter values ​​of multiple parameters of physical stress measurement respectively. The standard measurement parameter values ​​include stress standard value, warpage standard value and curvature radius parameter standard value;

[0072] The parameter comparison unit is used to compare the calculated multiple parameters with the parameters in the standard measurement parameter model one by one. After the difference calculation, if -0.02≤difference≤0.02, the parameter is judged to be normal; if the difference is <-0.02 or the difference is >0.02, the parameter is judged to be abnormal.

[0073] The anomaly tracking module includes a multi-parameter detection unit and an anomaly extraction unit;

[0074] The multi-parameter detection unit is used to track the multi-parameter values ​​of the measured object measured at the current moment in real time through a data tracker and a timer;

[0075] The abnormality extraction unit is used to arrange the abnormal data in sequence in real time according to the comparison result of the parameter comparison unit, and to remove the abnormal data of the corresponding channel in real time through the sensor.

[0076] By selecting a measurement object, performing pressure stretching on the measurement object and monitoring multiple physical stress parameters of the measurement object in real time, real-time comparison and comprehensive analysis of multiple physical stress parameters are performed, and real-time detection and tracking of multi-parameter values ​​of physical stress at the current moment are performed, and abnormal stress parameter values ​​are automatically extracted, the evaluation of physical stress measurement can be performed through multi-parameter comprehensive analysis, and by real-time monitoring of the current moment values ​​of multiple parameters, errors in physical stress measurement can be avoided, thereby increasing the accuracy of physical stress measurement data extraction.

[0077] Embodiment 2

[0078] Please refer to Figure 3 As shown: Based on the first embodiment, the data tracking end includes a data receiving module, a tracking prediction module and a result self-tracking module;

[0079] The data receiving module includes a data receiving unit and a data cleaning unit;

[0080] The data receiving unit is used to receive the physical stress measurement values ​​at the current moment and the historical moment in real time through the data receiver;

[0081] The data cleaning unit is used to clean the received data in real time through data cleaning.

[0082] The tracking prediction module includes a stress prediction unit, a prediction cycle unit and a prediction display unit;

[0083] The stress prediction unit is used to predict the physical stress measurement results according to the stress parameters at the current moment. The prediction method is as follows:

[0084] The stress parameter at the corresponding time is calculated with the stress standard parameter. If the difference is equal to ±0.01, the measurement result is judged to be within the normal value. If the difference is greater than 0.01 or less than -0.01, the measurement result is judged to be within the abnormal range, and a measurement warning is issued. One hour is counted as one cycle. The measurement result at the corresponding time of the next cycle is predicted based on the stress parameters of three cycles. If the average values ​​of the stress parameters of the three cycles all exceed the stress standard parameters, the measurement result at the corresponding time is judged to be within the abnormal range, and an abnormal warning message is issued;

[0085] The prediction cycle unit is used to set one hour as a cycle, and the prediction cycle is the same as the set cycle;

[0086] The prediction display unit is used to display the predicted physical stress measurement result value in real time through the display screen.

[0087] The result self-tracking module includes a measurement result unit and a tracking and early warning unit;

[0088] The measurement result unit is used to track the real result of physical stress measurement in real time through a data tracker;

[0089] The tracking and early warning unit is used to calculate the difference between the actual result and the predicted result. If the difference = 0, the prediction is judged to be valid. If the difference ≠ 0, the prediction is judged to be invalid and the secondary prediction is continued.

[0090] After tracking the trend of multi-parameter changes, by receiving data in real time and performing data cleaning, stress prediction is performed on the physical stress at the current moment. The measurement results of physical stress can be predicted in advance, so that the stress value can be adjusted in real time during the measurement of physical stress. The measurement of physical stress can predict the data of stress measurement results in advance, so that the limitation of physical stress measurement is reduced.

[0091] Embodiment 3

[0092] Please refer to Figure 4 As shown: Based on the first embodiment, the deviation correction end includes a three-dimensional determination module, a three-dimensional detection module, an error order classification module and a correction tracking module;

[0093] The three-dimensional determination module is used to set the three-dimensional angle of the measurement object for physical stress measurement;

[0094] The three-dimensional detection module includes an angle calculation unit, which is used to calculate the measured three-dimensional angle of physical stress in real time. The calculation steps are as follows:

[0095] Step 1: Set the center point of the physical stress measurement camera as the origin, establish the coordinate system Δz, and calculate the three-dimensional measurement movement distance using the calculation formula:

[0096]

[0097] Wherein, Δx, Δy and Δz collectively represent the three-dimensional coordinate system for physical stress measurement, α is the angle between the three-dimensional moving distance and the positive direction of the X-axis, θ is the angle between the three-dimensional moving distance and the positive direction of the Y-axis, A is the height of the object to be measured, Δx is the vector of the object to be measured in the X-axis direction, that is, the distance between the object to be measured and Δz in the X-axis direction, Δy is the vector of the object to be measured in the Y-axis direction, that is, the distance between the object to be measured and Δz in the Y-axis direction;

[0098] Step 2: Compare the calculated Δx and Δy of the three-dimensional measurement angle movement of the object to be measured with the touch screen movement distance, and set the standard displacement values ​​to O and M. If Δx-O≥1 and Δy-M≥1, it is judged that the three-dimensional measurement angle of the object to be measured is abnormal. If not, it is judged that the angle of the three-dimensional measurement angle movement of the object to be measured is normal.

[0099] The error order classification module includes an angle correction unit, which is used to automatically correct the angle according to the calculated angle deviation value;

[0100] The correction tracking module includes a correction self-tracking unit, which is used to track the corrected three-dimensional measurement angle at the current moment in real time through a data tracker, and calculate the difference between the three-dimensional measurement angles before and after the correction. If the difference = 0, it is judged that the angle correction is abnormal and correction continues. If the difference ≠ 0, it is judged that the angle correction is normal.

[0101] By real-time monitoring of the current physical stress measurement value and real-time tracking of the three-dimensional full-field measurement angle, when the physical stress measurement value is monitored to be biased or the three-dimensional full-field measurement angle is deviated, the stress measurement angle is changed in real time through step-by-step adjustment of the angle, so that the error in the measurement of physical stress is reduced, and the feasibility, safety and reliability of measurement before physical material production are improved.

[0102] In the present invention, a physical stress measurement device and a measurement method are provided. When the system is in operation, the IP address information of the stress measurement remote control area server is first configured; the data acquisition end is entered, and the parameter abnormality is judged by real-time monitoring of the change trend of multiple parameters of physical stress, and the change trend is analyzed and evaluated in real time to ensure the comprehensiveness of the physical stress measurement data. When measuring the physical stress, the object to be measured is selected, and then the object to be measured is pressure stretched and the multiple parameters of the physical stress of the object to be measured are monitored in real time, and the multiple parameters of the physical stress are compared and comprehensively analyzed in real time, and the multiple parameters of the physical stress are detected and tracked in real time at the current moment, and the abnormal stress parameter value is automatically extracted, so that the evaluation of the physical stress measurement can be comprehensively analyzed by multiple parameters, and the current moment values ​​of the multiple parameters are monitored in real time, so that the physical stress measurement avoids errors and increases the accuracy of the physical stress measurement data extraction; the data tracking end is entered, and the measurement result of the physical stress is predicted in advance according to the comprehensive analysis result and the change trend of multiple parameters is tracked in real time, so that the physical stress measurement result is real-time variable, and the physical stress measurement result can be predicted in advance. When measuring the physical stress, After tracking the trend of multi-parameter changes, by receiving data in real time and performing data cleaning, stress prediction is performed on the physical stress at the current moment, so that the measurement result of the physical stress can be predicted in advance, so that the stress value can be adjusted in real time during the measurement of the physical stress. The measurement of the physical stress can predict the data of the stress measurement result in advance, so that the physical stress measurement reduces limitations; entering the deviation correction end, when the prediction result is normal, the measurement state of the physical stress is monitored in real time, and the result value of the physical stress is predicted in real time. When the prediction result is abnormal, it indicates that the monitored physical stress measurement value has a deviation or the three-dimensional full-field measurement angle has a deviation, then the measurement angle is adjusted in real time according to the deviation value to ensure the safety and reliability of the physical stress measurement. When measuring physical stress, the physical stress measurement value at the current moment is monitored in real time, and the three-dimensional full-field measurement angle is tracked in real time. When the physical stress measurement value is monitored to have a deviation or the three-dimensional full-field measurement angle has a deviation, the stress measurement angle is changed in real time through the step-by-step adjustment of the angle, so that the measurement of the physical stress reduces the error, and improves the feasibility and safety and reliability of the measurement before the physical material is made.

[0103] A method for measuring physical stress comprises the following steps:

[0104] Step 1: Configure the IP address information of the stress measurement remote control area server;

[0105] Step 2: Enter the data acquisition terminal, monitor the changing trends of multiple parameters of physical stress in real time, judge parameter abnormalities, and analyze and evaluate the changing trends in real time to ensure the comprehensiveness of physical stress measurement data;

[0106] Step 3: Enter the data tracking terminal, and based on the comprehensive analysis results, track the change trends of multiple parameters in real time, predict the measurement results of physical stress in advance, so that the measurement results of physical stress can be changed in real time and the measurement results of physical stress can be predicted in advance;

[0107] Step 4: Enter the deviation correction end. When the prediction result is normal, the measurement status of physical stress is monitored in real time, and the result value of physical stress is predicted in real time. When the prediction result is abnormal, it means that the monitored physical stress measurement value has deviation or the three-dimensional full-field measurement angle has deviation. Then, the measurement angle is adjusted in real time according to the deviation value to ensure the safety and reliability of physical stress measurement.

[0108] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A physical stress measuring device, characterized in that: The device includes a data collection terminal, a data tracking terminal and a deviation correction terminal; The data acquisition end is used to select a measurement object, set a physical stress measurement model for the measurement object, perform pressure stretching on the measurement object, monitor multiple physical stress parameters of the measurement object in real time, compare and comprehensively analyze the multiple physical stress parameters in real time, and detect and track the multiple parameter values ​​of the physical stress at the current moment in real time, automatically extract abnormal stress parameter values, and ensure the authenticity of the stress measurement object parameters; The data tracking end is used to receive data in real time and perform data cleaning, then perform stress prediction on the physical stress at the current moment, and perform real-time tracking of the measurement results according to the stress prediction results at the current moment, and detect whether there is a deviation in real time during tracking. If there is a deviation, a stress measurement deviation warning is issued in real time and the stress value is adjusted; The deviation correction end is used to monitor the physical stress measurement value at the current moment in real time and to track the three-dimensional full-field measurement angle in real time. When it is detected that the physical stress measurement value has a deviation or the three-dimensional full-field measurement angle has a deviation, the stress measurement angle is changed in real time through a step-by-step adjustment of the angle, and the measurement angle is automatically corrected in real time to ensure the accuracy of the physical stress measurement.

2. The device according to claim 1, characterized in that: The data acquisition terminal includes a data acquisition module, a measurement model module and an abnormality tracking module; The data acquisition module includes a measurement mode unit and a multi-parameter acquisition unit; The measurement mode unit is used to set the measurement object and adjust the parameters of the physical stress measurement mode according to the measurement object; The multi-parameter acquisition unit is used to perform pressure stretching on the measured object and monitor the physical stress multi-parameters of the measured object in real time. The multi-parameters include stress, warpage and curvature radius parameters. The calculation formula is as follows: Stress calculation formula: σ = E·ε, where σ represents the stress of the object being measured at the current moment, ε represents the elastic strain value of the object being measured at the current moment, and E is the elastic modulus or Young's modulus of the material, which is a constant; Warpage calculation formula: Warpage (%) = (H{max}-H{min}) / T×100%, where H{max} represents the maximum warpage value of the measured object, H{min} represents the minimum warpage value of the measured object, and T represents the corresponding time; The calculation formula of the curvature radius is: the curve of the measured object is described by the function y=f(x), that is, any point on the curve is represented by P(x,y), then the curvature radius is: Where dy / dx is the first derivative of the function y=f(x), which represents the slope of the curve at point P; d 2 y / dx 2 It is the second-order derivative of the function y=f(x), which represents the curvature K of the curve at point P.

3. The device according to claim 2, characterized in that: The measurement model module includes a stress standard model and a parameter comparison unit; The stress standard model is used to set a standard measurement parameter model for physical stress. The set standard measurement parameter model is to set corresponding standard measurement parameter values ​​for multiple parameters of physical stress measurement respectively. The standard measurement parameter values ​​include stress standard value, warpage standard value and curvature radius parameter standard value. The parameter comparison unit is used to compare the calculated multiple parameters with the parameters in the standard measurement parameter model one by one. After the difference calculation, if -0.02≤difference≤0.02, the parameter is judged to be normal; if the difference is <-0.02 or the difference is >0.02, the parameter is judged to be abnormal.

4. The device according to claim 3, characterized in that: The anomaly tracking module includes a multi-parameter detection unit and an anomaly extraction unit; The multi-parameter detection unit is used to track the multi-parameter values ​​of the measured object measured at the current moment in real time through a data tracker and a timer; The abnormality extraction unit is used to arrange the abnormal data in sequence in real time according to the comparison result of the parameter comparison unit, and to remove the abnormal data of the corresponding channel in real time through the sensor.

5. The device according to claim 1, characterized in that: The data tracking terminal includes a data receiving module, a tracking prediction module and a result self-tracking module; The data receiving module includes a data receiving unit and a data cleaning unit; The data receiving unit is used to receive the physical stress measurement values ​​at the current moment and the historical moment in real time through the data receiver; The data cleaning unit is used to clean the received data in real time through data cleaning.

6. The device according to claim 5, characterized in that: The tracking prediction module includes a stress prediction unit, a prediction cycle unit and a prediction display unit; The stress prediction unit is used to predict the physical stress measurement result according to the stress parameter at the current moment, and the prediction method is as follows: The stress parameter at the corresponding time is calculated with the stress standard parameter. If the difference is equal to ±0.01, the measurement result is judged to be within the normal value. If the difference is greater than 0.01 or less than -0.01, the measurement result is judged to be within the abnormal range, and a measurement warning is issued. One hour is counted as one cycle. The measurement result at the corresponding time of the next cycle is predicted based on the stress parameters of three cycles. If the average values ​​of the stress parameters of the three cycles all exceed the stress standard parameters, the measurement result at the corresponding time is judged to be within the abnormal range, and an abnormal warning message is issued; The prediction cycle unit is used to set one hour as a cycle, and the prediction cycle is the same as the set cycle; The prediction display unit is used to display the predicted physical stress measurement result value in real time through a display screen.

7. The device according to claim 6, characterized in that: The result self-tracking module includes a measurement result unit and a tracking and early warning unit; The measurement result unit is used to track the real result of physical stress measurement in real time through a data tracker; The tracking and early warning unit is used to calculate the difference between the actual result and the predicted result. If the difference = 0, the prediction is judged to be valid. If the difference ≠ 0, the prediction is judged to be invalid and a secondary prediction is continued.

8. The device according to claim 1, characterized in that: The deviation correction end includes a three-dimensional determination module, a three-dimensional detection module, an error order classification module and a correction tracking module; The three-dimensional determination module is used to set the three-dimensional angle of measurement of physical stress of the measurement object; The three-dimensional detection module includes an angle calculation unit, which is used to calculate the measured three-dimensional angle of physical stress in real time. The calculation steps are as follows: Step 1: Set the center point of the physical stress measurement camera as the origin, establish the coordinate system Δz, and calculate the three-dimensional measurement movement distance using the calculation formula: Wherein, Δx, Δy and Δz collectively represent the three-dimensional coordinate system for physical stress measurement, α is the angle between the three-dimensional moving distance and the positive direction of the X-axis, θ is the angle between the three-dimensional moving distance and the positive direction of the Y-axis, A is the height of the object to be measured, Δx is the vector of the object to be measured in the X-axis direction, that is, the distance between the object to be measured and Δz in the X-axis direction, Δy is the vector of the object to be measured in the Y-axis direction, that is, the distance between the object to be measured and Δz in the Y-axis direction; Step 2: Compare the calculated Δx and Δy of the three-dimensional measurement angle movement of the object to be measured with the touch screen movement distance, and set the standard displacement values ​​to O and M. If Δx-O≥1 and Δy-M≥1, it is judged that the three-dimensional measurement angle of the object to be measured is abnormal. If not, it is judged that the angle of the three-dimensional measurement angle movement of the object to be measured is normal.

9. The device according to claim 8, characterized in that: The error order classification module includes an angle correction unit, which is used to automatically correct the angle according to the calculated angle deviation value; The correction tracking module includes a correction self-tracking unit, which is used to track the corrected three-dimensional measurement angle at the current moment in real time through a data tracker, and calculate the difference between the three-dimensional measurement angles before and after the correction. If the difference = 0, it is judged that the angle correction is abnormal and the correction continues. If the difference ≠ 0, it is judged that the angle correction is normal.

10. A physical stress measurement method according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Configure the IP address information of the stress measurement remote control area server; Step 2: Enter the data acquisition terminal, monitor the changing trends of multiple parameters of physical stress in real time, judge parameter abnormalities, and analyze and evaluate the changing trends in real time to ensure the comprehensiveness of physical stress measurement data; Step 3: Enter the data tracking terminal, and based on the comprehensive analysis results, track the change trends of multiple parameters in real time, predict the measurement results of physical stress in advance, so that the measurement results of physical stress can be changed in real time and the measurement results of physical stress can be predicted in advance; Step 4: Enter the deviation correction end. When the prediction result is normal, the measurement status of physical stress is monitored in real time, and the result value of physical stress is predicted in real time. When the prediction result is abnormal, it means that the monitored physical stress measurement value has deviation or the three-dimensional full-field measurement angle has deviation. Then, the measurement angle is adjusted in real time according to the deviation value to ensure the safety and reliability of physical stress measurement.

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