Truss hoisting stress detection method and detection device

Abstract

The invention provides a truss hoisting stress detection method and detection device. According to the method, ultrasonic stress detection equipment deployed on each stress concentration position on a truss is used for obtaining ultrasonic propagation sound of the stress concentration position under each specified ultrasonic frequency, and a critical refraction longitudinal wave method is used for detecting the ultrasonic propagation sound of the stress concentration position; according to the stress detection method, the stress value of the stress concentration position under the specified ultrasonic frequency is obtained by performing stress calculation on the obtained ultrasonic wave propagation sound of the stress concentration position under the specified ultrasonic frequency, so that the purpose of stress detection based on the ultrasonic wave is achieved. The method is not easily influenced by environmental factors, and the accuracy of stress detection in the truss hoisting stress process can be effectively improved.

Description

Technical Field

[0001] The present application relates to a monitoring technology for truss structures, and in particular to a truss lifting stress detection method and a detection device. Background Art

[0002] In the process of modern engineering construction and maintenance, the safety and stability of the truss as an important load-bearing structure are of vital importance. In order to ensure its safety, it is necessary to accurately monitor the stress during truss lifting.

[0003] At present, the traditional truss hoisting stress monitoring technology mainly relies on traditional stress sensors to detect the force during the truss hoisting process. However, during the truss hoisting operation, traditional stress sensors may be affected by environmental factors, resulting in inaccurate data, making it difficult to meet the high real-time requirements of modern engineering. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present application provides a truss lifting stress detection method and a detection device to improve the accuracy of stress detection during the truss lifting stress process, thereby ensuring the safety of the truss lifting operation.

[0005] The embodiment of the present application provides a truss hoisting stress detection method, which includes: for each stress concentration position on the truss, for an ultrasonic stress detection device deployed, obtaining the ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at the stress concentration position at each specified ultrasonic frequency; using the critical refraction longitudinal wave method, performing stress calculation on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency, and obtaining the stress value of the stress concentration position at the specified ultrasonic frequency; for each stress concentration position, based on the stress value of the stress concentration position at each specified ultrasonic frequency, obtaining the average stress value and the stress value standard deviation corresponding to the stress concentration position, and based on the average stress value and the stress value standard deviation, eliminating abnormal values ​​from the stress values ​​of the stress concentration position at each specified ultrasonic frequency, and taking the average value of each stress value remaining after eliminating the abnormal value as the target stress value of the stress concentration position; sending the target stress value corresponding to each stress concentration position to a display terminal for display on the display terminal.

[0006] In one embodiment, a critical refraction longitudinal wave method is used to perform stress calculation on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency to obtain the stress value of the stress concentration position at the specified ultrasonic frequency, including: obtaining the ultrasonic propagation sound time of the truss in a zero pressure state at the specified ultrasonic frequency; obtaining the acoustic elastic coefficient of the truss at the specified ultrasonic frequency; and determining the stress value of the stress concentration position at the specified ultrasonic frequency based on the difference between the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency and the ultrasonic propagation sound time in a zero pressure state at the specified ultrasonic frequency, and the acoustic elastic coefficient.

[0007] In one embodiment, the ultrasonic propagation sound time of a zero-pressure state at any specified ultrasonic frequency is determined by the following steps: obtaining a truss replica member of the same production specification as the truss members constituting the truss; when the truss replica member is in a zero-pressure state, sending an ultrasonic wave at the specified ultrasonic frequency to a specified test position of the truss replica member by means of an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device to obtain the current ultrasonic propagation sound time; determining the ultrasonic propagation sound time of the zero-pressure state based on the average value of the ultrasonic propagation sound time of a specified number of times.

[0008] In one embodiment, the acoustic elastic coefficient at any specified ultrasonic frequency is determined by the following steps: applying different axial stresses to the truss replica component, and when the truss replica component is under each applied axial stress, sending ultrasonic waves at the specified ultrasonic frequency to a specified test position of the truss replica component by an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device, so as to obtain the ultrasonic propagation sound time under the axial stress at the specified ultrasonic frequency; obtaining the acoustic elastic coefficient of the truss replica component at the specified ultrasonic frequency based on the obtained ultrasonic propagation sound time under each axial stress at the specified ultrasonic frequency; and determining the acoustic elastic coefficient of the truss replica component as the acoustic elastic coefficient of the truss at the specified ultrasonic frequency.

[0009] In one embodiment, each stress concentration position on the truss is determined by the following steps: establishing a truss model of the truss; and determining multiple stress concentration positions of the truss during the lifting process based on a simulation analysis of the lifting process of the truss model.

[0010] In one embodiment, based on the average stress value and the standard deviation of the stress value, outliers are eliminated from the stress values ​​of the stress concentration position at each specified ultrasonic frequency, including: for the stress value of the stress concentration position at each specified ultrasonic frequency, if the difference between the stress value and the average stress value is greater than a set threshold, then the stress value is determined to be an outlier; and the set threshold is determined based on the standard deviation of the stress value.

[0011] In one embodiment, the target stress value corresponding to each stress concentration position is sent to a display terminal for display on the display terminal, including: for each stress concentration position, the target stress value corresponding to the stress concentration position is sent to a designated wireless transmission module, so as to perform designated data compression and encoding processing in the designated wireless transmission module to obtain a processed target stress value; and the processed target stress value is transmitted to the display terminal through the designated wireless transmission module through the configured designated wireless transmission module.

[0012] The embodiment of the present application also provides a truss hoisting stress detection device, which includes: a first obtaining module, for obtaining, for each stress concentration position on the truss, an ultrasonic stress detection device deployed at the ultrasonic stress detection device, an ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at the stress concentration position at each specified ultrasonic frequency; a second obtaining module, for performing stress calculation on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency obtained by using a critical refraction longitudinal wave method, to obtain a stress value of the stress concentration position at the specified ultrasonic frequency; a third obtaining module, for each stress concentration position, based on the stress value of the stress concentration position at each specified ultrasonic frequency, obtaining an average stress value and a standard deviation of the stress value corresponding to the stress concentration position, and based on the average stress value and the standard deviation of the stress value, eliminating abnormal values ​​from the stress values ​​of the stress concentration position at each specified ultrasonic frequency, and taking the average value of each stress value remaining after eliminating the abnormal value as the target stress value of the stress concentration position; a sending module, for sending the target stress value corresponding to each stress concentration position to a display terminal for display on the display terminal.

[0013] In one embodiment, using the critical refraction longitudinal wave method, the stress calculation is performed on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency, and the stress value of the stress concentration position at the specified ultrasonic frequency is obtained, including: obtaining the ultrasonic propagation sound time of the truss at the specified ultrasonic frequency in a zero pressure state; obtaining the acoustic elastic coefficient of the truss at the specified ultrasonic frequency; based on the difference between the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency and the ultrasonic propagation sound time of the zero pressure state at the specified ultrasonic frequency, and the acoustic elastic coefficient, determining the stress value of the stress concentration position at the specified ultrasonic frequency. In the above manner, the stress value of the stress concentration position at the specified ultrasonic frequency can be accurately obtained.

[0014] In one embodiment, the ultrasonic propagation sound time of the zero pressure state at any specified ultrasonic frequency is determined by the following steps: obtaining a truss replica member of the same production specification as the truss member constituting the truss; when the truss replica member is in the zero pressure state, sending an ultrasonic wave at the specified ultrasonic frequency to a specified test position of the truss replica member through an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device to obtain the current ultrasonic propagation sound time; based on the average value of the ultrasonic propagation sound time of the specified number of times, determining the ultrasonic propagation sound time of the zero pressure state. In the above manner, the ultrasonic propagation sound time of the zero pressure state at any specified ultrasonic frequency can be obtained more accurately.

[0015] In one embodiment, the acoustic elastic coefficient at any specified ultrasonic frequency is determined by the following steps: applying different axial stresses to the truss replica component, and when the truss replica component is under each applied axial stress, sending ultrasonic waves at the specified ultrasonic frequency to the specified test position of the truss replica component through an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device, so as to obtain the ultrasonic propagation sound time under the axial stress at the specified ultrasonic frequency; based on the ultrasonic propagation sound time under each axial stress obtained at the specified ultrasonic frequency, obtaining the acoustic elastic coefficient of the truss replica component at the specified ultrasonic frequency; and determining the acoustic elastic coefficient of the truss replica component as the acoustic elastic coefficient of the truss at the specified ultrasonic frequency. In the above manner, the acoustic elastic coefficient at any specified ultrasonic frequency can be obtained more accurately.

[0016] In one embodiment, each stress concentration position on the truss is determined by the following steps: establishing a truss model of the truss; and determining multiple stress concentration positions of the truss during the lifting process based on a simulation analysis of the lifting process of the truss model. Each stress concentration position determined by the simulation analysis corresponds to the actual situation, providing a solid foundation for subsequent calculations.

[0017] In one embodiment, based on the average stress value and the standard deviation of the stress value, outliers are removed from the stress values ​​of the stress concentration position at each specified ultrasonic frequency, including: for each stress value of the stress concentration position at the specified ultrasonic frequency, if the difference between the stress value and the average stress value is greater than a set threshold, then the stress value is determined to be an outlier; the set threshold is determined based on the standard deviation of the stress value. By removing outliers in the above manner, more accurate data can be used in subsequent calculations to ensure the accuracy of subsequent calculations.

[0018] In one embodiment, the target stress value corresponding to each stress concentration position is sent to the display terminal for display on the display terminal, including: for each stress concentration position, the target stress value corresponding to the stress concentration position is sent to the designated wireless transmission module, so as to perform designated data compression and encoding processing in the designated wireless transmission module to obtain the processed target stress value; and the processed target stress value is transmitted to the display terminal through the configured designated wireless transmission module by the designated wireless transmission module. In this way, the user can view the real-time processing results through the display terminal, so that the operator can grasp the stress condition of the truss at any time, discover and handle abnormalities in time, and ensure the safety of the lifting operation.

[0019] An embodiment of the present application also provides an electronic device, comprising: a processor and a computer-readable storage medium for storing computer program instructions, wherein the computer program instructions, when executed by the computer-readable storage medium, enable the processor to execute the steps of the above method.

[0020] An embodiment of the present application also provides a machine-readable storage medium, which stores computer program instructions. When the computer program instructions are executed, the steps of the above method can be implemented.

[0021] In this embodiment, an ultrasonic stress detection device is deployed at each stress concentration position on the truss to obtain the ultrasonic propagation sound of the stress concentration position at each specified ultrasonic frequency. The critical refraction longitudinal wave method is used to perform stress calculation on the ultrasonic propagation sound of the stress concentration position at the specified ultrasonic frequency to obtain the stress value of the stress concentration position at the specified ultrasonic frequency, thereby achieving the purpose of ultrasonic-based stress detection. Compared with the use of stress sensors to detect stress in the prior art, the above method is not easily affected by environmental factors and can effectively improve the accuracy of stress detection during the truss lifting stress process.

[0022] Furthermore, in the embodiment of the present application, for each stress concentration location, based on the stress value of the stress concentration location at each specified ultrasonic frequency, the average stress value and the standard deviation of the stress value corresponding to the stress concentration location are obtained, and based on the average stress value and the standard deviation of the stress value, outliers are eliminated from the stress values ​​of the stress concentration location at each specified ultrasonic frequency, and the average value of each stress value remaining after eliminating the outliers is used as the target stress value of the stress concentration location, thereby eliminating the adverse effects of the outliers, making the obtained target stress values ​​of each stress concentration location more accurate, that is, further improving the accuracy of stress detection during the truss lifting stress process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a diagram of an implementation scenario of the truss lifting stress detection method provided in an embodiment of the present application.

[0024] Figure 2 It is a flow chart of the truss lifting stress detection method provided in an embodiment of the present application.

[0025] Figure 3 This is a flow chart of obtaining stress values ​​using the critical refraction longitudinal wave method provided in an embodiment of the present application.

[0026] Figure 4 This is a flow chart for removing outliers provided in an embodiment of the present application.

[0027] Figure 5 This is a structural diagram of the truss lifting stress detection device provided in an embodiment of the present application.

[0028] Figure 6 A structural diagram of an electronic device provided in an embodiment of the present application.

[0029] The markings of the components in the attached drawings are as follows: 1. Truss; 2. Ultrasonic stress detection equipment; 3. Truss stress concentration position. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present application can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present application.

[0031] See also Figure 1 , Figure 1 This is a diagram of the implementation scenario of the truss hoisting stress detection method provided in the embodiment of the present application. Figure 1 As shown, this implementation scenario involves a truss 1, a truss hoisting stress detection device 2, and a stress concentration location 3 among multiple stress concentration locations. The truss hoisting stress detection device 2 executes the method provided in the following embodiment to obtain the target stress value of each stress concentration location. The detailed steps are shown in the following embodiment and will not be repeated here.

[0032] See also Figure 2 , Figure 2 : is a flow chart of the truss hoisting stress detection method provided in the embodiment of the present application. Figure 2 As shown, the detection method includes the following steps.

[0033] S201, for each ultrasonic stress detection device deployed at each stress concentration position on the truss, obtain the ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at the stress concentration position at each specified ultrasonic frequency.

[0034] In this embodiment, each stress concentration position on the truss is obtained based on the construction of the truss model and the simulation analysis of the lifting process of the constructed truss model. The specific implementation method of each stress concentration position will be described in the following text in the form of a specific embodiment, and will not be repeated here.

[0035] In this embodiment, the ultrasonic stress detection device includes an ultrasonic generator, a transmitting probe, a receiving probe, etc. The ultrasonic generator generates ultrasonic waves at a specified ultrasonic frequency, the transmitting probe sends ultrasonic waves, and the receiving probe receives ultrasonic waves. The difference between the arrival time of the transmitting wave pulse of the transmitting probe and the arrival time of the receiving wave pulse of the receiving probe is determined as the ultrasonic propagation sound time. The ultrasonic propagation sound time is the propagation time of the ultrasonic wave at the stress concentration position.

[0036] In this embodiment, the specified ultrasonic frequency includes but is not limited to , and frequency The specified ultrasonic frequency can be set according to the specific application scenario, and is not specifically limited in the embodiments of the present application.

[0037] For the convenience of description, any stress concentration position is recorded as , any specified ultrasonic frequency is denoted as , any specified ultrasonic frequency The propagation time of the ultrasonic wave at any stress concentration position is recorded as .

[0038] S202, using the critical refraction longitudinal wave method, performing stress calculation on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency, to obtain the stress value of the stress concentration position at the specified ultrasonic frequency.

[0039] In this embodiment, there are many specific implementation methods of the above step S202, which will be explained in the following text in the form of specific embodiments and will not be repeated here.

[0040] S203, for each stress concentration location, based on the stress value of the stress concentration location at each specified ultrasonic frequency, obtain the average stress value and the stress value standard deviation corresponding to the stress concentration location, and based on the average stress value and the stress value standard deviation, remove abnormal values ​​from the stress values ​​of the stress concentration location at each specified ultrasonic frequency, and use the average value of each stress value remaining after removing the abnormal values ​​as the target stress value of the stress concentration location.

[0041] In this embodiment, there are many specific implementation methods of the above step S203, which will be explained in the following text in the form of specific embodiments and will not be repeated here.

[0042] S204: Send the target stress value corresponding to each stress concentration position to a display terminal for display on the display terminal.

[0043] In this embodiment, there are many specific implementation methods of the above step S204, which will be explained in the following text in the form of specific embodiments and will not be repeated here.

[0044] So far, completed Figure 2 The process shown.

[0045] pass Figure 2 The effect achieved by the process is that the ultrasonic stress detection equipment deployed at each stress concentration position on the truss is used to obtain the ultrasonic propagation sound of the stress concentration position at each specified ultrasonic frequency, and the critical refraction longitudinal wave method is used to calculate the stress of the ultrasonic propagation sound of the stress concentration position at the specified ultrasonic frequency, so as to obtain the stress value of the stress concentration position at the specified ultrasonic frequency, thereby achieving the purpose of stress detection based on ultrasonic waves. Compared with the use of stress sensors to detect stress in the prior art, the above method is not easily affected by environmental factors and can effectively improve the accuracy of stress detection during the truss lifting stress process.

[0046] Furthermore, in the embodiment of the present application, for each stress concentration location, based on the stress value of the stress concentration location at each specified ultrasonic frequency, the average stress value and the standard deviation of the stress value corresponding to the stress concentration location are obtained, and based on the average stress value and the standard deviation of the stress value, outliers are eliminated from the stress values ​​of the stress concentration location at each specified ultrasonic frequency, and the average value of each stress value remaining after eliminating the outliers is used as the target stress value of the stress concentration location, thereby eliminating the adverse effects of the outliers, making the obtained target stress values ​​of each stress concentration location more accurate, that is, further improving the accuracy of stress detection during the truss lifting stress process.

[0047] In one embodiment, each stress concentration position on the truss is determined by the following steps: a truss model of the truss is established, and multiple stress concentration positions of the truss during the lifting process are determined based on a simulation analysis of the lifting process of the truss model.

[0048] Specifically, for example, a three-dimensional model of the truss lifting process is established through simulation methods such as finite element analysis. The load applied during the lifting process and the stress of the truss structure are simulated, and the stress distribution of each node and component is analyzed in detail. Through simulation analysis, the stress concentration point of the truss during the lifting process is determined. The stress concentration point is the stress concentration position (denoted as The so-called stress concentration position is the position where the stress is the largest or the stress changes the most significantly. According to the simulation results, ultrasonic stress detection equipment is installed at these stress concentration positions.

[0049] In this embodiment, the monitoring layout of the stress concentration position is optimized through the above simulation analysis, providing a basis for subsequently obtaining accurate target stress values.

[0050] See also Figure 3 , Figure 3 Flow chart of obtaining stress value by critical refraction longitudinal wave method provided in the embodiment of the present application. Figure 3 As shown, using the critical refraction longitudinal wave method, stress calculation is performed on the ultrasonic propagation sound of the stress concentration position at the specified ultrasonic frequency, and obtaining the stress value of the stress concentration position at the specified ultrasonic frequency includes the following steps.

[0051] S301, obtaining the ultrasonic propagation sound time of the truss in a zero pressure state at the specified ultrasonic frequency.

[0052] S302, obtaining the acoustic elastic coefficient of the truss at the specified ultrasonic frequency.

[0053] The ultrasonic propagation time of the truss at zero pressure state at any specified ultrasonic frequency and the acoustic elastic coefficient at the specified ultrasonic frequency are determined in the following manner after obtaining and determining multiple stress concentration positions of the truss during the lifting process. The determined ultrasonic propagation time of the truss at zero pressure state at any specified ultrasonic frequency and the acoustic elastic coefficient at the specified ultrasonic frequency can be stored in a specified storage location in the ultrasonic stress detection device. When the ultrasonic stress detection device obtains the stress value of the stress concentration position at the specified ultrasonic frequency, the stored acoustic elastic coefficient and the ultrasonic propagation time of the truss at zero pressure state are directly called for calculation.

[0054] In one embodiment, the ultrasonic propagation sound time of the zero pressure state at any specified ultrasonic frequency is determined by the following steps: obtaining a truss replica member of the same production specification as the truss member constituting the truss. After obtaining the truss replica member, when the truss replica member is in the zero pressure state, an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device is used to send ultrasonic waves at the specified ultrasonic frequency to the specified test position of the truss replica member, and the difference between the arrival time of the transmitting wave pulse of the transmitting probe and the arrival time of the receiving wave pulse of the receiving probe is calculated to obtain the current ultrasonic propagation sound time. Afterwards, the ultrasonic propagation sound time of the zero pressure state is determined based on the average value of the ultrasonic propagation sound time of the specified number of times. The following is explained in more detail by examples.

[0055] For example, when the truss replica member is in a zero pressure state, at an ultrasonic generator frequency of Under these conditions, the arrival time of the pulses of the transmitting and receiving waves is captured, and the propagation time of the ultrasonic wave under the zero stress state is calculated. Repeat this process 10 times and calculate the ultrasonic propagation time under zero stress state obtained 10 times. Perform the average operation and determine the final operation structure as The ultrasonic sound propagation time in the zero pressure state under ).

[0056] In one embodiment, the acoustic elastic coefficient at any specified ultrasonic frequency is determined by the following steps: applying different axial stresses to the truss replica component, and the specific axial stress can be set according to the specific application scenario, which is not specifically limited in the embodiment of the present application. When the truss replica component is under each applied axial stress, an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device is used to send an ultrasonic wave at the specified ultrasonic frequency to the specified test position of the truss replica component to obtain the ultrasonic wave propagation sound time under the axial stress at the specified ultrasonic frequency. By analogy, the ultrasonic wave propagation sound time under each axial stress at the specified ultrasonic frequency is obtained, and based on the ultrasonic wave propagation sound time under each axial stress at the specified ultrasonic frequency, the acoustic elastic coefficient of the truss replica component at the specified ultrasonic frequency is obtained. The acoustic elastic coefficient of the truss replica component is determined as the acoustic elastic coefficient of the truss at the specified ultrasonic frequency.

[0057] For example, continuing the previous example, apply axial stress to the truss replica member ,exist Transmit and receive ultrasonic waves to obtain Lower axial stress The propagation time of the ultrasonic wave in the structure is, Lower axial stress When ultrasonic sound propagates under , when ultrasonic wave propagates With axial stress Recorded as a set of data ( ). Under different pressures, , repeat the above steps 15 times to obtain 15 sets of data) .against , the slope is calculated by the least square method, and the slope obtained is the slope of the truss replication component in The elastic coefficient under , also for the truss The elastic coefficient under .

[0058] It should be noted that, respectively and Repeat the above steps under the condition to obtain the truss When ultrasonic sound propagates under zero pressure , and in Acoustoelastic coefficient , trusses in When ultrasonic sound propagates under zero pressure , and in Lower elastic coefficient .

[0059] S303, determining the stress value of the stress concentration location at the specified ultrasonic frequency based on the difference between the ultrasonic propagation acoustic time of the stress concentration location at the specified ultrasonic frequency and the ultrasonic propagation acoustic time of the zero pressure state at the specified ultrasonic frequency and the acoustoelastic coefficient.

[0060] For example, A stress concentration location The ultrasonic wave propagation time is recorded as .

[0061] The stress value at the stress concentration location at the specified ultrasonic frequency is calculated by the following formula:

[0062] in, Lower stress concentration position The stress value of for When ultrasonic sound propagates in a zero pressure state; for Lower stress concentration position When ultrasonic sound propagates.

[0063] Repeat the above steps S301-S303 to obtain The stress concentration positions The stress value , Stress concentration locations The stress value ,and Stress concentration locations The stress value .

[0064] In this embodiment, the stress value of each stress concentration position under different specified ultrasonic frequencies can be obtained by the above method. The stress value obtained by multi-frequency ultrasonic waves can ensure the reliability of the obtained stress value.

[0065] See also Figure 4 , Figure 4 This is a flowchart of removing outliers provided in the embodiment of the present application. Figure 4 As shown, removing outliers specifically includes the following steps.

[0066] S401, for each stress concentration position, based on the stress value of the stress concentration position at each specified ultrasonic frequency, obtaining an average stress value and a stress value standard deviation corresponding to the stress concentration position.

[0067] For example, any stress concentration location The average stress value and the standard deviation of stress values Determined by the following formula:

[0068] in, for Lower stress concentration position The stress value of for Lower stress concentration position The stress value of for Lower stress concentration position The stress value.

[0069] S402, for each stress value at the stress concentration position under a specified ultrasonic frequency, if the difference between the stress value and the average stress value is greater than a set threshold, the stress value is determined to be an abnormal value; the set threshold is determined based on the standard deviation of the stress value.

[0070] For example, if the threshold T is set, the ultrasonic frequency Lower stress concentration position The stress value The stress concentration position The average stress value If the difference exceeds the threshold T, it is considered that is an abnormal value. It can be expressed by the following formula: In a further embodiment, after the outliers are removed, the average value of the stress values ​​remaining after the outliers are removed is used as the target stress value of the stress concentration position.

[0071] For example, the process of obtaining the target stress value at any stress concentration location can be expressed by the following formula:

[0072] in, The stress concentration position The target stress value of The stress concentration position Outliers For the specified ultrasonic frequency The stress concentration positions The remaining stress value after removing abnormal values ​​from the stress value.

[0073] In this embodiment, by the above method, from the specified ultrasonic frequency The abnormal values ​​are eliminated from the stress values ​​at each stress concentration position, so that the target stress value at each stress concentration position is more accurate.

[0074] In one embodiment, for each stress concentration position, the target stress value corresponding to the stress concentration position is sent to a designated wireless transmission module (e.g., a Zigbee wireless transmission module) to perform designated data compression and encoding processing in the designated wireless transmission module to obtain the processed target stress value. The processed target stress value is transmitted to the display terminal through the configured designated wireless transmission module by the designated wireless transmission module. In this way, the efficiency and integrity of data transmission can be improved. In addition, encryption transmission technology is used to ensure the security of data during transmission and prevent data from being intercepted or tampered with.

[0075] Accordingly, the display terminal is equipped with a corresponding Zigbee receiving module, which can receive the processed target stress values ​​from multiple stress concentration locations. Decoding and verifying the received data can also ensure the integrity and accuracy of the received data.

[0076] In one embodiment, a graphical user interface (GUI) is used on the display terminal to display the target stress value and the trend of the historical target stress value at each stress concentration location. The terminal system stores and analyzes the received data and generates a statistical report on stress changes to facilitate monitoring and decision-making by operators.

[0077] In the above embodiment, the wireless transmission module is used to realize the real-time feedback of the target stress value of each stress concentration position, so that the operator can grasp the stress condition of the truss at any time, discover and handle abnormalities in time, and ensure the safety of the lifting operation.

[0078] The method provided in the embodiment of the present application is described above. The device provided in the embodiment of the present application is described below: See also Figure 5 , Figure 5 This is a structural diagram of the truss lifting stress detection device provided in the embodiment of the present application. Figure 5 As shown, the device 500 includes: a first obtaining module 501, a second obtaining module 502, a third obtaining module 503, and a sending module 504.

[0079] The first obtaining module 501 is used to obtain the ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at each stress concentration position on the truss at each specified ultrasonic frequency; The second obtaining module 502 is used to calculate the stress of the ultrasonic wave propagation sound at the stress concentration position at the specified ultrasonic frequency using the critical refraction longitudinal wave method to obtain the stress value of the stress concentration position at the specified ultrasonic frequency; The third obtaining module 503 is used to obtain, for each stress concentration location, an average stress value and a stress value standard deviation corresponding to the stress concentration location based on the stress value of the stress concentration location at each specified ultrasonic frequency, and remove abnormal values ​​from the stress values ​​of the stress concentration location at each specified ultrasonic frequency based on the average stress value and the stress value standard deviation, and use the average value of each stress value remaining after removing the abnormal value as the target stress value of the stress concentration location; The sending module 504 is used to send the target stress value corresponding to each stress concentration position to the display terminal for display on the display terminal.

[0080] In one embodiment, using the critical refraction longitudinal wave method, stress calculation is performed on the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency to obtain the stress value of the stress concentration position at the specified ultrasonic frequency, including: Obtaining the ultrasonic propagation sound of the truss in a zero-pressure state at the specified ultrasonic frequency; Obtaining the acoustic elastic coefficient of the truss at the specified ultrasonic frequency; Based on the difference between the ultrasonic propagation acoustic time at the stress concentration location at the specified ultrasonic frequency and the ultrasonic propagation acoustic time at the zero pressure state at the specified ultrasonic frequency, and the acoustoelastic coefficient, the stress value at the stress concentration location at the specified ultrasonic frequency is determined. In the above manner, the stress value at the stress concentration location at the specified ultrasonic frequency can be accurately obtained.

[0081] In one embodiment, the ultrasonic propagation sound time of the zero pressure state at any specified ultrasonic frequency is determined by the following steps: obtaining a truss replica member of the same production specification as the truss member constituting the truss; when the truss replica member is in the zero pressure state, sending an ultrasonic wave at the specified ultrasonic frequency to a specified test position of the truss replica member through an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device to obtain the current ultrasonic propagation sound time; based on the average value of the ultrasonic propagation sound time of the specified number of times, determining the ultrasonic propagation sound time of the zero pressure state. In the above manner, the ultrasonic propagation sound time of the zero pressure state at any specified ultrasonic frequency can be obtained more accurately.

[0082] In one embodiment, the acoustic elastic coefficient at any specified ultrasonic frequency is determined by the following steps: applying different axial stresses to the truss replica component, and when the truss replica component is under each applied axial stress, sending ultrasonic waves at the specified ultrasonic frequency to the specified test position of the truss replica component through an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device, so as to obtain the ultrasonic propagation sound time under the axial stress at the specified ultrasonic frequency; based on the ultrasonic propagation sound time under each axial stress obtained at the specified ultrasonic frequency, obtaining the acoustic elastic coefficient of the truss replica component at the specified ultrasonic frequency; and determining the acoustic elastic coefficient of the truss replica component as the acoustic elastic coefficient of the truss at the specified ultrasonic frequency. In the above manner, the acoustic elastic coefficient at any specified ultrasonic frequency can be obtained more accurately.

[0083] In one embodiment, each stress concentration position on the truss is determined by the following steps: establishing a truss model of the truss; and determining multiple stress concentration positions of the truss during the lifting process based on a simulation analysis of the lifting process of the truss model. In this way, each stress concentration position determined by the simulation analysis corresponds to the actual situation, providing a solid foundation for subsequent calculations.

[0084] In one embodiment, based on the average stress value and the standard deviation of the stress value, outliers are removed from the stress values ​​of the stress concentration position at each specified ultrasonic frequency, including: for each stress value of the stress concentration position at the specified ultrasonic frequency, if the difference between the stress value and the average stress value is greater than a set threshold, then the stress value is determined to be an outlier; the set threshold is determined based on the standard deviation of the stress value. By removing outliers in the above manner, more accurate data can be used in subsequent calculations to ensure the accuracy of subsequent calculations.

[0085] In one embodiment, the target stress value corresponding to each stress concentration position is sent to the display terminal for display on the display terminal, including: for each stress concentration position, the target stress value corresponding to the stress concentration position is sent to the designated wireless transmission module, so as to perform designated data compression and encoding processing in the designated wireless transmission module to obtain the processed target stress value; and the processed target stress value is transmitted to the display terminal through the configured designated wireless transmission module by the designated wireless transmission module. In this way, the user can view the real-time processing results through the display terminal, so that the operator can grasp the stress condition of the truss at any time, discover and handle abnormalities in time, and ensure the safety of the lifting operation.

[0086] The device provided in this application is simple in design and easy to install at the stress concentration position of the lifting truss. It is highly integrated and convenient for on-site use and maintenance. Through real-time monitoring and data feedback functions, it can provide early warning of potential stress overload conditions, prevent the truss from breaking or other dangerous situations due to excessive stress during the lifting process, and improve the safety of the lifting operation. In addition, the device and method are not only suitable for stress monitoring during the truss lifting process, but can also be extended to other structures that require real-time monitoring of stress changes, such as bridges, building components, etc.

[0087] So far, completed Figure 5 Structural description of the device shown.

[0088] See also Figure 6 , Figure 6 This is a structural diagram of an electronic device provided in an embodiment of the present application. Figure 6 As shown, the hardware structure may include: a processor and a machine-readable storage medium, the machine-readable storage medium storing machine-executable instructions that can be executed by the processor; the processor is used to execute the machine-executable instructions to implement the method disclosed in the above example of this application.

[0089] Based on the same application concept as the above method, an embodiment of the present application also provides a machine-readable storage medium, on which a number of computer instructions are stored. When the computer instructions are executed by a processor, the method disclosed in the above example of the present application can be implemented.

[0090] Exemplarily, the above-mentioned machine-readable storage medium can be any electronic, magnetic, optical or other physical storage device, which can contain or store information, such as executable instructions, data, etc. For example, the machine-readable storage medium can be: RAM (Radom Access Memory), volatile memory, non-volatile memory, flash memory, storage drive (such as hard disk drive), solid state drive, any type of storage disk (such as optical disk, DVD, etc.), or similar storage medium, or a combination thereof.

[0091] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A truss hoisting stress detection method, characterized in that: The method comprises: For each ultrasonic stress detection device deployed at each stress concentration position on the truss, obtaining the ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at the stress concentration position at each specified ultrasonic frequency; Using the critical refraction longitudinal wave method, the stress is calculated for the ultrasonic propagation sound time of the stress concentration position at the specified ultrasonic frequency, so as to obtain the stress value of the stress concentration position at the specified ultrasonic frequency; For each stress concentration location, based on the stress value of the stress concentration location at each specified ultrasonic frequency, an average stress value and a stress value standard deviation corresponding to the stress concentration location are obtained, and based on the average stress value and the stress value standard deviation, outliers are removed from the stress values ​​of the stress concentration location at each specified ultrasonic frequency, and the average value of each stress value remaining after removing the outliers is used as the target stress value of the stress concentration location; The target stress value corresponding to each stress concentration position is sent to a display terminal to be displayed on the display terminal.

2. The method according to claim 1, characterized in that The method of using the critical refraction longitudinal wave method to calculate the stress of the ultrasonic wave propagation sound at the stress concentration position at the specified ultrasonic frequency to obtain the stress value of the stress concentration position at the specified ultrasonic frequency includes: When obtaining the ultrasonic propagation sound of the truss in a zero pressure state at the specified ultrasonic frequency; obtaining the acoustic elastic coefficient of the truss at the specified ultrasonic frequency; The stress value of the stress concentration location at the specified ultrasonic frequency is determined based on the difference between the ultrasonic propagation sound time at the stress concentration location at the specified ultrasonic frequency and the ultrasonic propagation sound time at the zero pressure state at the specified ultrasonic frequency and the acoustoelastic coefficient.

3. The method according to claim 2, characterized in that The ultrasonic propagation time in the zero pressure state at any given ultrasonic frequency is determined by the following steps: Obtaining a truss replica component having the same production specifications as the truss components constituting the truss; When the truss replica component is in a zero pressure state, an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device is used to send an ultrasonic wave at the specified ultrasonic frequency to a specified test position of the truss replica component to obtain the ultrasonic wave propagation sound of the current time; The ultrasonic wave propagation sound time in the zero pressure state is determined based on an average value of the ultrasonic wave propagation sound time for a specified number of times.

4. The method according to claim 3, characterized in that The acoustoelastic coefficient at any given ultrasonic frequency is determined by the following steps: Apply different axial stresses to the truss replica component, and when the truss replica component is under each applied axial stress, send ultrasonic waves at the specified ultrasonic frequency to a specified test position of the truss replica component through an ultrasonic stress detection device of the same model as any deployed ultrasonic stress detection device, so as to obtain ultrasonic propagation sound under the axial stress at the specified ultrasonic frequency; Based on the ultrasonic propagation acoustic time under each axial stress at the specified ultrasonic frequency, the acoustic elastic coefficient of the truss replica component at the specified ultrasonic frequency is obtained; The acoustoelastic coefficient of the truss replica member is determined as the acoustoelastic coefficient of the truss at the specified ultrasonic frequency.

5. The method according to claim 1, characterized in that Each stress concentration location on the truss is determined by the following steps: establishing a truss model of the truss; Based on the simulation analysis of the lifting process of the truss model, multiple stress concentration positions of the truss during the lifting process are determined.

6. The method according to claim 1, characterized in that The removing abnormal values ​​from the stress values ​​at the stress concentration positions at each specified ultrasonic frequency based on the average stress value and the stress value standard deviation comprises: For the stress value at the stress concentration position under each specified ultrasonic frequency, if the difference between the stress value and the average stress value is greater than a set threshold, the stress value is determined to be an abnormal value; the set threshold is determined based on the standard deviation of the stress value.

7. The method according to claim 1, characterized in that The step of sending the target stress value corresponding to each stress concentration position to a display terminal for display on the display terminal includes: For each stress concentration position, the target stress value corresponding to the stress concentration position is sent to a designated wireless transmission module, so that designated data compression and encoding processing is performed in the designated wireless transmission module to obtain a processed target stress value; The processed target stress value is transmitted to the display terminal through the configured designated wireless transmission module.

8. A truss hoisting stress detection device, characterized in that: The device comprises: A first obtaining module is used to obtain, for each ultrasonic stress detection device deployed at each stress concentration position on the truss, the ultrasonic propagation sound time of the ultrasonic wave emitted by the ultrasonic stress detection device at the stress concentration position at each specified ultrasonic frequency; A second obtaining module is used to calculate the stress of the ultrasonic wave propagation sound at the stress concentration position at the specified ultrasonic frequency using a critical refraction longitudinal wave method to obtain a stress value at the stress concentration position at the specified ultrasonic frequency; A third obtaining module is used to obtain, for each stress concentration location, an average stress value and a stress value standard deviation corresponding to the stress concentration location based on the stress value of the stress concentration location at each specified ultrasonic frequency, and to remove abnormal values ​​from the stress values ​​of the stress concentration location at each specified ultrasonic frequency based on the average stress value and the stress value standard deviation, and to use the average value of each stress value remaining after removing the abnormal values ​​as the target stress value of the stress concentration location; The sending module is used to send the target stress value corresponding to each stress concentration position to the display terminal for display on the display terminal.

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