Sensor installation status self-checking method and sensor for realizing installation status self-checking

Abstract

The invention discloses a sensor installation state self-check method, comprising the following steps: step 1, the monitored equipment is in a static state, and the sensor self-checks to obtain data in three directions in a rectangular coordinate system; step 2, averaging the data measured multiple times in the three directions to obtain the measurement mean values ​​in the three directions; step 3, calculating the component angles in each direction through the measurement mean values ​​in the three directions; step 4, subtracting the component angles from the preset angles respectively, and reinstalling and adjusting the sensor when the absolute value of the difference exceeds a preset threshold; when the absolute value of the difference is less than the preset threshold, the installation direction meets the requirements, and the measurement mean values ​​in the three directions are saved as compensation values ​​for subsequent data collection.

Description

Technical Field

[0001] The present invention relates to the field of sensors, and in particular to a method for self-checking the installation status of a sensor. The present invention also relates to a sensor for realizing self-checking the installation status. Background Art

[0002] The installation state of the sensor directly affects its monitoring effect. During the use of the sensor, the deflection of the installation direction and the loosening of the fasteners may cause the collected signal to be unusable. In response to the monitoring problem of sensor looseness, the patent document CN104819738A discloses a method for detecting the looseness of the sensor structure, which uses the set multi-order filter coefficient and the collected sensor data to calculate the convolution, and adjusts the data length to calculate the judgment threshold of the loose structure. This method is relatively cumbersome in the implementation and operation process. One is that it is necessary to set the multi-order filter coefficient, and the filter coefficients of each order directly affect the calculation result of the convolution. Therefore, it takes more time to carefully try to give the filter coefficients of each order, and it is also necessary to set it again for sensors of different working conditions and different models and specifications; the second is that the judgment threshold method of adjusting the data length to calculate the loose structure is adopted. Similarly, when it is for sensors of different working conditions and different models and specifications, it is necessary to re-set the judgment threshold. In addition, the sensor may be skewed in the direction during installation and use, which will also affect the validity of the sensor data collection, but the patent document CN104819738A fails to provide detection and solutions. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sensor with an installation status self-checking function, which can conveniently and quickly detect the deviation of the sensor installation direction and the looseness of fasteners.

[0004] In order to solve the above technical problems, the present invention discloses a sensor installation status self-check method, which is characterized by comprising the following steps:

[0005] Step 1: The monitored device is in a stationary state, and the sensor self-tests to obtain data in the three directions of X, Y, and Z in a rectangular coordinate system;

[0006] Step 2: Take the average of the data measured multiple times in the three directions of X, Y, and Z to obtain the average values ​​of the three directions, namely A1, A2, and A3;

[0007] Step 3, calculate the component angles α1, α2, α3 in each direction through the measured mean values ​​A1, A2, A3 in the three directions;

[0008] Step 4, respectively subtract the component angles α1, α2, and α3 from the preset angles β1, β2, and β3. When the absolute value of the difference exceeds the preset threshold, reinstall and adjust the sensor; when the absolute value of the difference is less than the preset threshold, the installation direction meets the requirements, and the measurement mean values ​​A1, A2, and A3 in the three directions are saved as compensation values ​​for subsequent data collection.

[0009] Preferably, the method further comprises the following steps:

[0010] Step 5: When the monitored equipment is running and gradually stops, the sensor self-tests the damping factor λ installed i When the damping factor exceeds the threshold, the sensor can continue to be used normally without tightening; when the damping factor is lower than the threshold, the sensor needs to be tightened.

[0011] Preferably, in step 3, the calculation formula for calculating the coordinate angles α1, α2, α3 in each direction from the measured mean values ​​A1, A2, A3 in the three directions is:

[0012]

[0013] Preferably, the damping factor λ of the sensor self-test installation in step 5 is i The calculation formula is:

[0014]

[0015] Where t1 is the moment when the monitored equipment completes operation, and the test amplitude component of the sensor at this time is The correction value of the test amplitude component in the above formula is Among them A i is the measured value in step 2, a i is the test accuracy of the sensor in the corresponding direction, and the moment when the correction value of the test amplitude component drops to k times the test accuracy is t2.

[0016] Preferably, in step 5, the damping factor used to determine whether the sensor needs to be tightened is a damping factor in the X direction, the Y direction, the Z direction, or damping factors in multiple directions.

[0017] Preferably, the value range of k is 3-10.

[0018] Preferably, the method for determining the time t2 when the correction value of the test amplitude component drops to k times the test accuracy is as follows: the time when the sensor test value is lower than the sensor k times the test accuracy for 5 consecutive times is t a ,t b ,t c ,t d ,t e , where t a It is identified as t2.

[0019] The present invention also discloses a sensor for realizing self-checking of installation status, comprising:

[0020] The data measurement module detects the data in the three directions of X, Y, and Z in the rectangular coordinate system of the sensor itself when the monitored device is in a stationary state;

[0021] The data calculation module takes the average of multiple measurements of data in the three directions of X, Y, and Z to obtain the average values ​​of the measurements in the three directions, which are A1, A2, and A3 respectively; the component angles α1, α2, and α3 in each direction are calculated through the average values ​​of the measurements in the three directions, A1, A2, and A3;

[0022] A comparison judgement device is used to make a difference between the component angles α1, α2, and α3 and the preset angles β1, β2, and β3, respectively, and judge whether the absolute value of the difference exceeds a preset threshold value;

[0023] The information output module outputs a signal to reinstall and adjust the sensor when the absolute value of the difference exceeds a preset threshold; when the absolute value of the difference is less than the preset threshold, it outputs a signal that the installation direction meets the requirements, and saves the measured averages A1, A2, and A3 in the three directions as compensation values ​​for subsequent data collection.

[0024] Preferably, the data calculation module also includes a damping factor λ of the sensor installation during the process of the monitored equipment completing operation and gradually stopping. i The comparison judge also includes a comparison of the damping factor and the set threshold value; the information output module also includes a signal that the sensor can continue to be used normally and does not need to be tightened when the damping factor exceeds the threshold value; when the damping factor is lower than the threshold value, the sensor needs to be tightened.

[0025] Preferably, in the data calculation module, the calculation formula for calculating the coordinate angles α1, α2, α3 in three directions from the measured mean values ​​A1, A2, A3 in three directions is:

[0026]

[0027] Preferably, the damping factor λ of the sensor self-check installation in the data calculation module is i The calculation formula is:

[0028]

[0029] Where t1 is the moment when the monitored equipment completes operation, and the test amplitude component of the sensor at this time is The correction value of the test amplitude component in the above formula is Among them A i is the measured value in step 2, α iis the test accuracy of the sensor in the corresponding direction, and the moment when the correction value of the test amplitude component drops to k times the test accuracy is t2.

[0030] The sensor installation status self-checking method and the sensor for realizing installation status self-checking of the present invention can monitor the sensor installation direction during the installation phase to ensure that the installation direction meets the requirements; during use, the sensor can be monitored for accidental deflection to avoid invalid collected data due to accidental deflection; during use, the loose installation of the sensor can be monitored to avoid invalid collected data due to looseness. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The figure is a flow chart of a preferred embodiment of the sensor installation status self-checking method of the present invention.

[0032] Figure 2 Data collected by properly installed sensors when the monitored equipment is at rest.

[0033] Figure 3 The data is collected by the sensor when the monitored equipment is in a stationary state and there is deflection.

[0034] Figure 4 The data is collected by the sensors that have not loosened during the process of the monitored equipment gradually stopping after operation.

[0035] Figure 5 The data collected by the loosened sensor during the gradual stop of the monitored equipment. DETAILED DESCRIPTION

[0036] like Figure 1 As shown, the sensor installation status self-checking method of the present invention comprises the following steps:

[0037] (1) The monitored device is in a stationary state, and the sensor starts to measure and obtain data in the three directions of X, Y, and Z in a rectangular coordinate system. The average of multiple measurement values ​​in each direction is obtained to obtain the measurement averages of the three directions, namely A1, A2, and A3;

[0038] (2) Calculate the coordinate angles α1, α2, and α3 in each direction from A1, A2, and A3. The calculation formula is:

[0039]

[0040] The coordinate angles α1, α2, and α3 are respectively subtracted from the preset angles β1, β2, and β3. When the absolute value of the difference exceeds the preset threshold, the sensor needs to be reinstalled and adjusted; when the absolute value of the difference is less than the preset threshold, the installation direction meets the requirements, and the average values ​​A1, A2, and A3 are saved as compensation values ​​for subsequent data collection;

[0041] (3) When the monitored equipment is running and gradually stops, calculate the damping factor λ of the sensor installation i :

[0042]

[0043] Where t1 is the moment when the monitored equipment completes operation, and the test amplitude component of the sensor at this time is The correction value of the test amplitude component in the above formula is Among them A i is the measured value in step (1), a i is the test accuracy of the sensor in the corresponding direction, the moment when the correction value of the test amplitude component drops to k times the test accuracy is t2, where the value range of k is 3 to 10. The moment t2 when the correction value of the test amplitude component drops to k times the test accuracy is determined as follows: the moments when the sensor test value is lower than k times the test accuracy of the sensor for 5 consecutive times are t a ,t b ,t c ,t d ,t e , where t a It is identified as t2.

[0044] When the damping factor exceeds the threshold, the sensor can continue to be used normally without tightening; when the damping factor is lower than the threshold, the sensor needs to be tightened. The damping factor used to determine whether the sensor needs to be tightened can be one or more.

[0045] Preferably, to determine whether the sensor needs to be tightened, the damping factor in the Y direction or the damping factor in the Z direction or the damping factors in multiple directions may be selected for comparison with the damping factor threshold.

[0046] The following describes an embodiment including specific measurement data:

[0047] Example 1

[0048] Install the sensor with installation status self-check function on the monitored equipment, and collect sensor data when the equipment is stationary. The data results are as follows: Figure 2 As shown in the figure, the horizontal axis represents the number of sampling points, and the vertical axis represents the sensor test amplitude. The average of multiple measurements in each direction is 0.327, -0.013, and 9.141 in the three directions. The coordinate angles α1, α2, and α3 in each direction are calculated using the following formula:

[0049]

[0050] The calculated results of the coordinate angles are α1=87.95°, α2=89.92°, and α3=2.08°, which are respectively subtracted from the preset angles β1, β2, and β3, where β1=90°, β2=90°, and β3=0°. The preset threshold is 5°, and the absolute values ​​of the differences do not exceed the preset threshold. The installation direction meets the requirements, and the mean values ​​of 0.327, -0.013, and 9.141 are saved as compensation values ​​for subsequent data collection.

[0051] Example 2

[0052] Install the sensor with installation status self-check function on the monitored equipment, and collect sensor data when the equipment is stationary. The data results are as follows: Figure 3 As shown, the average values ​​of the multiple measurements in each direction are 1.273, 0.160, and 9.056 in the three directions. The coordinate angles,,, in each direction are calculated. The coordinate angle calculation results are α1 = 82.00°, α2 = 88.99°, α3 = 8.09°, which are respectively subtracted from the preset angles β1, β2, and β3, where β1 = 90°, β2 = 90°, β3 = 0°, and the preset threshold is 5°. The absolute value of the two sets of differences exceeds the preset threshold, and the installation direction does not meet the requirements. The sensor needs to be reinstalled and adjusted.

[0053] Example 3

[0054] When the monitored equipment is running and gradually stops, the sensor test results are as follows: Figure 4 Calculate the damping factor λ for the sensor installation i :

[0055]

[0056] Where t1 is the time when the monitored equipment completes operation. Figure 4 Where t1 is the sampling time of the first sampling point. At this time, the test amplitude component of the sensor in the X direction is 1.824. The correction value of the test amplitude component in the above formula is The test accuracy of the sensor in the X direction is 10 -3 Here k is 10, and the sampling points where the X-direction measurement values ​​are lower than the test accuracy of the sensor 10 times for 5 consecutive times are 24-28, that is, time t2 is the sampling time of the 24th sampling point. According to the sampling frequency of 100 Hz, it can be calculated that the difference between the sampling time of the 24th sampling point and the sampling time of the first sampling point is 0.23s, and the damping factor λ1 in the X direction is 1.72.

[0057] The damping factor threshold in the X direction is 1.2. Since λ1=1.72 exceeds 1.2, the sensor can continue to be used normally without tightening.

[0058] Example 4

[0059] When the monitored equipment is running and gradually stops, the sensor test results are as follows: Figure 5 Calculate the damping factor λ for the sensor installation i :

[0060]

[0061] Where t1 is the time when the monitored equipment completes operation. Figure 5 Where t1 is the sampling time of the first sampling point. At this time, the test amplitude component of the sensor in the Y direction is 2.971. The correction value of the test amplitude component in the above formula is The test accuracy of the sensor in the Y direction is 10 -3 Here k is 10, and the sampling points where the X-direction measurement values ​​are lower than the test accuracy of the sensor 10 times for 5 consecutive times are 103-107, that is, time t2 is the sampling time of the 103rd sampling point. According to the sampling frequency of 100 Hz, it can be calculated that the difference between the sampling time of the 45th sampling point and the sampling time of the first sampling point is 1.02 s, and the damping factor λ2 in the Y direction is 1.07.

[0062] The damping factor threshold in the Y direction is 1.2. Since λ2=1.07 is lower than 1.2, the sensor needs to be tightened.

[0063] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A sensor installation status self-check method, characterized in that: The following steps are involved: Step 1: The monitored device is in a stationary state, and the sensor self-tests to obtain data in the three directions of X, Y, and Z in a rectangular coordinate system; Step 2: Take the average of the data measured multiple times in the three directions of X, Y, and Z to obtain the average values ​​of the three directions, namely A1, A2, and A3; Step 3, calculate the component angles α1, α2, α3 in each direction through the measured mean values ​​A1, A2, A3 in the three directions; Step 4, subtract the component angles α1, α2, and α3 from the preset angles β1, β2, and β3, respectively. When the absolute value of the difference exceeds the preset threshold, reinstall and adjust the sensor; when the absolute value of the difference is less than the preset threshold, the installation direction meets the requirements, and the measurement mean values ​​A1, A2, and A3 in the three directions are saved as compensation values ​​for subsequent data collection; Step 5: When the monitored equipment is running and gradually stops, the sensor self-checks the damping factor λ installed i ,When the damping factor exceeds the threshold, the sensor can continue to be used normally without tightening; when the damping factor is lower than the threshold, the sensor needs to be tightened; The damping factor λ of the sensor self-test installation in step 5 i The calculation formula is: Where t1 is the moment when the monitored equipment completes operation, and the test amplitude component of the sensor at this time is The correction value of the test amplitude component in the above formula is Among them A i is the mean of the measurements in the three directions in step 2, a i is the test accuracy of the sensor in the corresponding direction, and the moment when the correction value of the test amplitude component drops to k times the test accuracy is t2.

2. The sensor installation status self-checking method according to claim 1, characterized in that: In step 3, the calculation formula for calculating the coordinate angles α1, α2, and α3 in each direction from the measured mean values ​​A1, A2, and A3 in the three directions is:

3. The sensor installation status self-checking method according to claim 1, characterized in that: In step 5, the damping factors used to determine whether the sensor needs to be tightened are damping factors in the X direction, the Y direction, the Z direction, or damping factors in multiple directions.

4. The sensor installation status self-checking method according to claim 1, characterized in that: The value range of k is 3-10.

5. The sensor installation status self-checking method according to claim 1, characterized in that: The method for determining the time t2 when the correction value of the test amplitude component drops to k times the test accuracy is as follows: the time when the sensor test value is lower than the sensor k times the test accuracy for 5 consecutive times is t a ,t b ,t c ,t d ,t e , where t a It is identified as t2.

6. A sensor for realizing self-checking of installation status, characterized in that: include: The data measurement module detects the data in the three directions of X, Y, and Z in the rectangular coordinate system of the sensor itself when the monitored device is in a stationary state; The data calculation module takes the average of multiple measurements of data in the three directions of X, Y, and Z to obtain the average values ​​of the measurements in the three directions, which are A1, A2, and A3 respectively; the component angles α1, α2, and α3 in each direction are calculated through the average values ​​of the measurements in the three directions, A1, A2, and A3; A comparison judgement device is used to make a difference between the component angles α1, α2, and α3 and the preset angles β1, β2, and β3, respectively, and judge whether the absolute value of the difference exceeds a preset threshold value; The information output module outputs a signal to reinstall and adjust the sensor when the absolute value of the difference exceeds a preset threshold; when the absolute value of the difference is less than the preset threshold, it outputs a signal that the installation direction meets the requirements, and saves the measured averages A1, A2, and A3 in the three directions as compensation values ​​for subsequent data collection; The data calculation module also includes the calculation of the damping factor λi of the sensor self-check installation during the process of the monitored equipment completing operation and gradually stopping; the comparison judgement also includes the comparison of the damping factor with the set threshold; the information output module also includes when the damping factor exceeds the threshold, the output sensor can continue to be used normally and does not need to be tightened; when the damping factor is lower than the threshold, the sensor needs to be tightened. The damping factor λ of the sensor self-check installation in the data calculation module i The calculation formula is: Where t1 is the moment when the monitored equipment completes operation, and the test amplitude component of the sensor at this time is The correction value of the test amplitude component in the above formula is Among them A i is the mean value of the measurements in three directions, a i is the test accuracy of the sensor in the corresponding direction, and the moment when the correction value of the test amplitude component drops to k times the test accuracy is t2.

7. The sensor for realizing self-checking of installation status according to claim 6, characterized in that: In the data calculation module, the calculation formula for calculating the coordinate angles α1, α2, and α3 in the three directions from the measured mean values ​​A1, A2, and A3 in the three directions is:

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