A comprehensive mechanical testing and coordinated loading system

Abstract

The invention relates to the technical field of comprehensive mechanical detection and coordinated loading, and specifically discloses a comprehensive mechanical detection and coordinated loading system, which comprises: a loading point position evaluation module, a loading force evaluation module, a single mechanical quality analysis module, a database, a multi-comprehensive mechanical quality analysis module and a comprehensive quality reliability analysis module; the invention evaluates whether the loading point position and the loading force of an automobile frame under mechanical loading are accurate, and analyzes the quality reliability of the automobile frame from three levels of frame deformation, frame component offset and frame component cracking, and finally performs multi-comprehensive mechanical tests on the automobile frame, thereby improving the comprehensiveness of the quality analysis of the automobile frame, avoiding problems of the automobile frame in actual application, reducing the cost of maintenance and recall, and revealing the stability and reliability of the automobile frame under multi-comprehensive stress, thereby ensuring that the automobile frame can work normally in actual application and maintain the expected service life.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive mechanical detection and coordinated loading, and in particular to a comprehensive mechanical detection and coordinated loading system. Background Art

[0002] In many industrial fields, such as aerospace, automobile manufacturing, mechanical engineering, etc., products are often subjected to a variety of complex mechanical environments during actual use. Traditional mechanical testing equipment can usually only apply a certain type of load alone. This single load detection method cannot accurately simulate the actual stress conditions of the product, resulting in the inability to discover some problems that only occur under complex working conditions during the detection process. Therefore, it is of great significance to develop a detection system that can realize the coordinated loading of multiple mechanical loads.

[0003] The following problems still exist in the prior art: 1. When performing mechanical loading, the loading point position and loading force are not analyzed accurately, which reduces the accuracy of the test results and may lead to incorrect judgment of product quality. At the same time, incorrect test results will mislead the direction of product quality improvement.

[0004] 2. The quality reliability of the automobile frame under each single mechanical load is not comprehensively analyzed from three aspects: frame deformation, frame component offset and frame component cracking. This reduces the comprehensiveness of the quality reliability analysis of the automobile frame, makes it impossible to discover potential quality problems in a timely manner, and makes it impossible to optimize the quality of the automobile frame in a targeted manner.

[0005] 3. Failure to conduct multiple comprehensive mechanical tests on the automobile frame will make it impossible to avoid problems with the automobile frame in actual applications, reduce the cost of repairs and recalls, and reveal the stability and reliability of the automobile frame under multiple comprehensive stresses, thereby making it impossible to ensure that the automobile frame can work normally in actual applications and maintain its expected lifespan. Summary of the invention

[0006] In view of this, in order to solve the problems raised in the above background technology, a comprehensive mechanical detection collaborative loading system is now proposed.

[0007] The purpose of the present invention can be achieved through the following technical solutions: The present invention provides a comprehensive mechanical detection collaborative loading system, including: a loading point position evaluation module, which is used to construct a three-dimensional information model of a target automobile frame under each single mechanical loading, obtain the position coordinate value of each loading point of the target automobile frame under each single mechanical loading, and evaluate whether the loading point position of the target automobile frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed; if it is accurate, a loading force evaluation module is executed.

[0008] The loading force evaluation module is used to collect the actual loading force and standard loading force corresponding to each loading point of the target vehicle frame under each single mechanical loading, and evaluate whether the loading force of the target vehicle frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed. If it is accurate, the single mechanical quality analysis module is executed.

[0009] The single mechanical quality analysis module is used to collect the detection information of the target automobile frame under each single mechanical loading when the loading point position and loading force of the target automobile frame under each single mechanical loading are accurate, and analyze the quality reliability of the target automobile frame under each single mechanical loading.

[0010] The database is used to store the standard positions of each loading point of the target automobile frame under each single mechanical loading, store the initial contour image of the target automobile frame, and store the initial positions of the center points of each frame component of the target automobile frame.

[0011] The multi-comprehensive mechanical quality analysis module is used to perform multi-comprehensive mechanical loading on the target automobile frame and analyze the quality reliability of the target automobile frame under multi-comprehensive mechanical loading.

[0012] The comprehensive quality reliability analysis module is used to analyze the comprehensive quality reliability of the target automobile frame and compare it with the set value. If the comprehensive quality reliability of the target automobile frame is less than the set value, feedback is given.

[0013] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: (1) The present invention improves the accuracy of the test results by evaluating whether the loading point position and the loading force of the target automobile frame under each single mechanical loading are accurate, thereby avoiding misjudgment of product quality and preventing erroneous test results from misleading the direction of product quality improvement.

[0014] (2) The present invention comprehensively analyzes the quality reliability of the automobile frame under each single mechanical load from three aspects: frame deformation, frame component offset and frame component cracking. This improves the comprehensiveness of the quality reliability analysis of the automobile frame, improves the timeliness of the discovery of potential quality problems, and can optimize the quality of the automobile frame in a targeted manner.

[0015] (3) The present invention avoids problems with the automobile frame in actual applications by performing multiple comprehensive mechanical tests on the automobile frame, while reducing the cost of repairs and recalls, and intuitively reveals the stability and reliability of the automobile frame under multiple comprehensive stresses, thereby ensuring that the automobile frame can work normally in actual applications and maintain its expected lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the system module structure connection of the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 As shown, the present invention provides a comprehensive mechanical detection collaborative loading system, including: a loading point position evaluation module, a loading force evaluation module, a single mechanical quality analysis module, a database, multiple comprehensive mechanical quality analysis modules and a comprehensive quality reliability analysis module.

[0020] The loading point position assessment module is connected to the loading force assessment module, the loading force assessment module is connected to the single mechanical quality analysis module, the single mechanical quality analysis module is connected to the multiple comprehensive mechanical quality analysis modules, both the single mechanical quality analysis module and the multiple comprehensive mechanical quality analysis modules are connected to the comprehensive quality reliability analysis module, and both the loading point position assessment module and the single mechanical quality analysis module are connected to the database.

[0021] The loading point position evaluation module is used to construct a three-dimensional information model of the target automobile frame under each single mechanical loading, obtain the position coordinate value of each loading point of the target automobile frame under each single mechanical loading, and evaluate whether the loading point position of the target automobile frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed; if it is accurate, the loading force evaluation module is executed.

[0022] In a specific embodiment of the present invention, each single mechanical loading includes but is not limited to vibration loading, impact loading and pressurization loading, and each loading point under vibration loading refers to each vibration action point, each loading point under impact loading refers to each impact action point, and each loading point under pressurization loading refers to each pressure action point.

[0023] In a specific embodiment of the present invention, the specific process of evaluating whether the loading point position of the target automobile frame under each single mechanical loading is accurate is as follows: A1, recording the position coordinate value of each loading point of the target automobile frame under each single mechanical loading as (x ij ,y ij ,z ij ), where i represents the number of a single mechanics, i=1,2,...,n, and j represents the number of the loading point, j=1,2,...,m.

[0024] A2. Extract the standard position of each loading point of the target automobile frame under each single mechanical loading from the database, and bring it into the corresponding three-dimensional information model to obtain the standard position coordinate value of each loading point of the target automobile frame under each single mechanical loading, recorded as

[0025] A3. Calculate the position deviation β of each loading point of the target vehicle frame under each single mechanical loading ij , Here, △x′, △y′ and △z′ represent the position offset values ​​corresponding to the x-axis, y-axis and z-axis respectively.

[0026] A4. Calculate the loading point position accuracy of the target vehicle frame under each single mechanical loading i , Where m represents the number of loading points.

[0027] A5. Compare the loading point position accuracy of the target automobile frame under each single mechanical loading with the loading point position accuracy of the set reference. If the loading point position accuracy of the target automobile frame under a single mechanical loading is greater than or equal to the loading point position accuracy of the set reference, it indicates that the loading point position under the single mechanical loading is accurate. Otherwise, it indicates that the loading point position under the single mechanical loading is inaccurate. In this way, it is obtained whether the loading point position of the target automobile frame under each single mechanical loading is accurate.

[0028] The loading force evaluation module is used to collect the actual loading force and standard loading force corresponding to each loading point of the target automobile frame under each single mechanical loading, and evaluate whether the loading force of the target automobile frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed; if it is accurate, the single mechanical quality analysis module is executed.

[0029] In a specific embodiment of the present invention, the specific process of evaluating whether the loading force of the target automobile frame under each single mechanical loading is accurate is as follows: B1, subtracting the actual loading force corresponding to each loading point of the target automobile frame under each single mechanical loading from the standard loading force to obtain the loading force deviation corresponding to each loading point of the target automobile frame under each single mechanical loading, extracting the maximum value from the difference as the loading force deviation of the target automobile frame under each single mechanical loading, and recording it as Δε i .

[0030] B2. Calculate the loading force accuracy of the target vehicle frame under each single mechanical loading δ i , Where △ε represents the loading force deviation of the set reference.

[0031] B3. Compare the loading force accuracy of the target vehicle frame under each single mechanical loading with the loading force accuracy of the set reference. If the loading force accuracy of the target vehicle frame under a single mechanical loading is greater than or equal to the loading force accuracy of the set reference, it indicates that the loading force of the target vehicle frame under the single mechanical loading is accurate. Otherwise, it indicates that the loading force of the target vehicle frame under the single mechanical loading is inaccurate, thereby obtaining whether the loading force of the target vehicle frame under each single mechanical loading is accurate.

[0032] The embodiment of the present invention improves the accuracy of the test results by evaluating whether the loading point position and the loading force of the target automobile frame under each single mechanical loading are accurate, thereby avoiding misjudgment of product quality and preventing erroneous test results from misleading the direction of product quality improvement.

[0033] The single mechanical quality analysis module is used to collect detection information of the target automobile frame under each single mechanical loading when the loading point position and loading force of the target automobile frame under each single mechanical loading are accurate, and analyze the quality reliability of the target automobile frame under each single mechanical loading.

[0034] In a specific embodiment of the present invention, the detection information includes a deformation image of the automobile frame, the center point position of each frame component, and the number of cracks existing in each frame component and the length of each crack.

[0035] It should be noted that the automobile frame deformation image is acquired by a high-definition camera, and the center point positions of the frame components are acquired by a high-definition camera that acquires images corresponding to the frame components, and locates the center point positions of the frame components from the images corresponding to the frame components.

[0036] It should also be noted that the number of cracks existing in each frame component and the length of each crack are collected in the following manner: 1) Image collection: Scan each frame component to obtain a complete image data set; 2) Image preprocessing: Preprocess the collected images, including denoising, contrast enhancement, etc., to improve image quality; 3) Crack recognition: Use image processing algorithms, such as edge detection, morphological processing, etc. to identify cracks in the image. These algorithms can automatically detect discontinuous areas in the image and thus identify cracks; 4) Quantity calculation: The number of cracks in the image can be automatically calculated through image processing algorithms; 5) Length measurement: For each crack, its length can be measured using image processing technology, which usually involves tracing the contour of the crack and calculating the total length of the contour.

[0037] In a specific embodiment of the present invention, the specific process of analyzing the quality reliability of the target automobile frame under each single mechanical loading is as follows: C1, extracting the automobile frame deformation image, the center point position of each frame component, and the number and length of each crack of each frame component from the detection information of the target automobile frame under each single mechanical loading, and calculating the frame deformation degree of the target automobile frame under each single mechanical loading respectively. Frame component offset θ i and the cracking degree of frame components ρ i .

[0038] In a specific embodiment of the present invention, the specific process of calculating the frame deformation of the target automobile frame under each single mechanical loading is as follows: D1, extracting the initial contour image of the target automobile frame from the database, and locating the initial contour area of ​​the target automobile frame therefrom, and recording it as S 初 .

[0039] D2. Extract the deformation contour of the vehicle frame from the deformation image of the target vehicle frame under each single mechanical loading, and overlap and compare it with the initial contour of the target vehicle frame to obtain the overlapping contour area of ​​the target vehicle frame under each single mechanical loading, and record it as S i .

[0040] D3. Calculate the frame deformation of the target vehicle frame under each single mechanical load Among them, K represents the overlapping contour area ratio of the reference automobile frame, and e represents a natural constant.

[0041] It should be noted that the specific process of calculating the deviation of the frame components of the target automobile frame under each single mechanical loading is as follows: the center point position of each frame component of the target automobile frame under each single mechanical loading is brought into the corresponding three-dimensional information model to obtain the center point coordinate value of each frame component of the target automobile frame under each single mechanical loading, which is recorded as Wherein, r represents the number of the frame component, r=1,2,...,f.

[0042] The initial positions of the center points of each frame component of the target automobile frame are extracted from the database and brought into the corresponding three-dimensional information model to obtain the initial coordinate values ​​of the center points of each frame component of the target automobile frame, which are recorded as

[0043] Calculate the frame component offset θ of the target vehicle frame under each single mechanical load i , Among them, △x″, △y″ and △z″ respectively represent the allowed x-axis, y-axis and z-axis corresponding to the center point position offset values ​​of the frame components, and f represents the number of frame components.

[0044] In a specific embodiment of the present invention, the specific process of calculating the cracking degree of the frame components of the target automobile frame under each single mechanical loading is as follows: E1, the number of cracks existing in each frame component of the target automobile frame under each single mechanical loading is recorded as μ ig , where g represents the number of the frame component, g = 1, 2, ..., q.

[0045] E2. Extract the maximum value from the lengths of the cracks in each frame component of the target automobile frame under each single mechanical load and record it as L ig .

[0046] E3. Calculate the cracking degree ρ of the target automobile frame under each single mechanical loading i , Wherein, μ′ and L′ represent the number and length of cracks of set reference, respectively, and q represents the number of frame components.

[0047] C2. Calculate the quality reliability of the target vehicle frame under each single mechanical load Among them, a1, a2 and a3 represent the weights of the quality reliability assessment corresponding to the set frame deformation, frame component offset and frame component cracking, respectively, and a1+a2+a3=1.

[0048] In the specific embodiment of the present invention, the setting value of a1 is 0.3, the setting value of a2 is 0.3, and the setting value of a3 is 0.4. In the actual quality reliability evaluation, the cracking degree of the frame component is the most critical factor because it is directly related to the safety of the vehicle. The frame deformation and the offset of the frame components are also very important. They reflect the structural stability of the frame and the matching accuracy between the components from different angles, and together constitute the important content of the quality reliability evaluation of the automobile frame.

[0049] The embodiment of the present invention comprehensively analyzes the quality reliability of the automobile frame under each single mechanical loading from three aspects: frame deformation, frame component offset and frame component cracking, thereby improving the comprehensiveness of the quality reliability analysis of the automobile frame, improving the timeliness of the discovery of potential quality problems, and can perform targeted optimization of the quality of the automobile frame.

[0050] The database is used to store the standard positions of each loading point of the target automobile frame under each single mechanical loading, store the initial contour image of the target automobile frame, and store the initial positions of the center points of each frame component of the target automobile frame. The data sources in the database of this embodiment are shown in Table 1.

[0051] Table 1 Data sources in the database

[0052]

[0053] The multi-comprehensive mechanical quality analysis module is used to perform multi-comprehensive mechanical loading on the target automobile frame and analyze the quality reliability of the target automobile frame under the multi-comprehensive mechanical loading.

[0054] In a specific embodiment of the present invention, the specific method of performing multi-comprehensive mechanical loading on the target automobile frame is: each single mechanic is combined in pairs to obtain each combined mechanics, and whether the loading point position and loading force of the target automobile frame under each combined mechanics loading are evaluated in the same way as whether the loading point position and loading force of the target automobile frame under each single mechanics loading are evaluated; when the loading point position and loading force of the target automobile frame under each combined mechanics loading are accurate, the detection information of the target automobile frame under each combined mechanics loading is collected.

[0055] In a specific embodiment of the present invention, the specific process of analyzing the quality reliability of the target automobile frame under multiple comprehensive mechanical loadings is: F1. Based on the detection information of the target automobile frame under each combined mechanical loading, the quality reliability of the target automobile frame under each combined mechanical loading is calculated in the same way as the calculation method of the quality reliability of the target automobile frame under each single mechanical loading.

[0056] F2. Compare the quality reliability of the target automobile frame under each combined mechanical loading with the quality reliability of the set reference combined mechanical loading. If the quality reliability of the target automobile frame under each combined mechanical loading is greater than the quality reliability of the set reference combined mechanical loading, the quality reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ1.

[0057] F3. If any mass reliability of the target automobile frame under a certain combined mechanical loading is less than the mass reliability of the set reference combined mechanical loading, the mass reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ2.

[0058] F4. If the quality reliability of the target automobile frame under each combined mechanical loading is less than the quality reliability of the set reference combined mechanical loading, the quality reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ3.

[0059] F5. In summary, the quality reliability of the target automobile frame under multi-comprehensive mechanical loading is obtained. The value of is τ1 or τ2 or τ3, where τ1>τ2>τ3.

[0060] In a specific embodiment of the present invention, the value of τ1 is 1, and the value of τ2 is The value of τ3 is 0.

[0061] The comprehensive quality reliability analysis module is used to analyze the comprehensive quality reliability of the target automobile frame and compare it with a set value. If the comprehensive quality reliability of the target automobile frame is less than the set value, feedback is given.

[0062] In a specific embodiment of the present invention, the specific process of analyzing the comprehensive quality reliability of the target automobile frame is as follows: G1. Based on the quality reliability of the target automobile frame under each single mechanical loading, the quality reliability of the target automobile frame under a single mechanical loading is analyzed in the same manner as the quality reliability of the target automobile frame under multiple comprehensive mechanical loadings.

[0063] G2. Calculate the comprehensive quality reliability of the target automobile frame Among them, a4 and a5 represent the weights of the comprehensive quality reliability assessment corresponding to the quality reliability under the set multi-comprehensive mechanical loading and single mechanical loading, respectively, and a4+a5=1.

[0064] In a specific embodiment of the present invention, the setting value of a4 is 0.6, and the setting value of a5 is 0.4. When calculating the comprehensive quality reliability of the target automobile frame, the quality reliability evaluation under multiple comprehensive mechanical loadings is more important. Although the quality reliability evaluation under a single mechanical loading can provide basic performance data and problem location information, the multiple comprehensive mechanical loading is closer to the actual use scenario of the automobile frame, and can comprehensively consider the synergistic effect of multiple mechanical factors and the overall stability of the frame system. However, the evaluation data under a single mechanical loading can also be used as supplementary information to help engineers better understand the performance changes of the frame under different mechanical environments, so as to more accurately perform comprehensive quality reliability evaluation.

[0065] The embodiment of the present invention performs multiple comprehensive mechanical tests on the automobile frame to avoid problems with the automobile frame in actual applications, while reducing the cost of repairs and recalls, and intuitively reveals the stability and reliability of the automobile frame under multiple comprehensive stresses, thereby ensuring that the automobile frame can work normally in actual applications and maintain its expected lifespan.

[0066] The above contents are merely examples and explanations of the concept of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, they shall all fall within the protection scope of the present invention.

Claims

1. A comprehensive mechanical detection collaborative loading system, characterized in that: include: The loading point position evaluation module is used to construct a three-dimensional information model of the target vehicle frame under each single mechanical loading, obtain the position coordinate value of each loading point of the target vehicle frame under each single mechanical loading, and evaluate whether the loading point position of the target vehicle frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed. If it is accurate, the loading force evaluation module is executed; The loading force evaluation module is used to collect the actual loading force and standard loading force corresponding to each loading point of the target vehicle frame under each single mechanical loading, and evaluate whether the loading force of the target vehicle frame under each single mechanical loading is accurate. If it is inaccurate, feedback adjustment is performed. If it is accurate, the single mechanical quality analysis module is executed; A single mechanical quality analysis module is used to collect the detection information of the target automobile frame under each single mechanical loading when the loading point position and loading force of the target automobile frame under each single mechanical loading are accurate, and analyze the quality reliability of the target automobile frame under each single mechanical loading; A database for storing the standard positions of each loading point of the target automobile frame under each single mechanical loading, storing the initial contour image of the target automobile frame, and storing the initial positions of the center points of each frame component of the target automobile frame; The multi-comprehensive mechanical quality analysis module is used to perform multi-comprehensive mechanical loading on the target automobile frame and analyze the quality reliability of the target automobile frame under multi-comprehensive mechanical loading; The comprehensive quality reliability analysis module is used to analyze the comprehensive quality reliability of the target automobile frame and compare it with the set value. If the comprehensive quality reliability of the target automobile frame is less than the set value, feedback is given.

2. A comprehensive mechanical testing collaborative loading system according to claim 1, characterized in that: The specific process of evaluating whether the loading point position of the target automobile frame under each single mechanical loading is accurate is as follows: A1. Record the position coordinates of each loading point of the target vehicle frame under each single mechanical loading as (x ij ,y ij ,z ij ), where i represents the number of a single mechanics, i=1,2,...,n, and j represents the number of the loading point, j=1,2,...,m; A2. Extract the standard position of each loading point of the target automobile frame under each single mechanical loading from the database, and bring it into the corresponding three-dimensional information model to obtain the standard position coordinate value of each loading point of the target automobile frame under each single mechanical loading, recorded as A3. Calculate the position deviation β of each loading point of the target vehicle frame under each single mechanical loading ij , Wherein, △x′, △y′ and △z′ represent the position offset values ​​corresponding to the x-axis, y-axis and z-axis respectively; A4. Calculate the loading point position accuracy of the target vehicle frame under each single mechanical loading i , Where m represents the number of loading points; A5. Compare the loading point position accuracy of the target automobile frame under each single mechanical loading with the loading point position accuracy of the set reference. If the loading point position accuracy of the target automobile frame under a single mechanical loading is greater than or equal to the loading point position accuracy of the set reference, it indicates that the loading point position under the single mechanical loading is accurate. Otherwise, it indicates that the loading point position under the single mechanical loading is inaccurate. In this way, it is obtained whether the loading point position of the target automobile frame under each single mechanical loading is accurate.

3. A comprehensive mechanical testing collaborative loading system according to claim 2, characterized in that: The specific process of evaluating whether the loading force of the target automobile frame under each single mechanical loading is accurate is as follows: B1. Subtract the actual loading force and standard loading force corresponding to each loading point of the target vehicle frame under each single mechanical loading to obtain the loading force deviation corresponding to each loading point of the target vehicle frame under each single mechanical loading, and extract the maximum value as the loading force deviation of the target vehicle frame under each single mechanical loading, and record it as △ε i ; B2. Calculate the loading force accuracy of the target vehicle frame under each single mechanical loading δ i , Among them, △ε represents the loading force deviation of the set reference; B3. Compare the loading force accuracy of the target vehicle frame under each single mechanical loading with the loading force accuracy of the set reference. If the loading force accuracy of the target vehicle frame under a single mechanical loading is greater than or equal to the loading force accuracy of the set reference, it indicates that the loading force of the target vehicle frame under the single mechanical loading is accurate. Otherwise, it indicates that the loading force of the target vehicle frame under the single mechanical loading is inaccurate, thereby obtaining whether the loading force of the target vehicle frame under each single mechanical loading is accurate.

4. A comprehensive mechanical testing collaborative loading system according to claim 2, characterized in that: The detection information includes a deformation image of the automobile frame, the center point position of each frame component, and the number of cracks existing in each frame component and the length of each crack.

5. A comprehensive mechanical testing collaborative loading system according to claim 4, characterized in that: The specific process of analyzing the quality reliability of the target automobile frame under each single mechanical loading is as follows: C1. Extract the deformation image of the automobile frame, the center point position of each frame component, the number of cracks in each frame component and the length of each crack from the detection information of the target automobile frame under each single mechanical loading, and calculate the frame deformation degree of the target automobile frame under each single mechanical loading. Frame component offset θ i and the cracking degree of frame components ρ i ; C2. Calculate the quality reliability of the target vehicle frame under each single mechanical load Among them, a1, a2 and a3 represent the weights of the quality reliability assessment corresponding to the set frame deformation, frame component offset and frame component cracking, respectively, and a1+a2+a3=1.

6. A comprehensive mechanical testing collaborative loading system according to claim 5, characterized in that: The specific process of calculating the frame deformation of the target automobile frame under each single mechanical loading is as follows: D1. Extract the initial contour image of the target vehicle frame from the database, and locate the initial contour area of ​​the target vehicle frame from it, and record it as S 初 ; D2. Extract the deformation contour of the vehicle frame from the deformation image of the target vehicle frame under each single mechanical loading, and overlap and compare it with the initial contour of the target vehicle frame to obtain the overlapping contour area of ​​the target vehicle frame under each single mechanical loading, and record it as S i ; D3. Calculate the frame deformation of the target vehicle frame under each single mechanical load Among them, K represents the overlapping contour area ratio of the reference automobile frame, and e represents a natural constant.

7. The comprehensive mechanical testing and coordinated loading system according to claim 5 is characterized by: The specific process of calculating the cracking degree of the frame components of the target automobile frame under each single mechanical loading is as follows: E1. The number of cracks in each frame component of the target automobile frame under each single mechanical load is recorded as μ ig , where g represents the number of the frame component, g = 1, 2, ..., q; E2. Extract the maximum value from the lengths of the cracks in each frame component of the target automobile frame under each single mechanical load and record it as L ig ; E3. Calculate the cracking degree ρ of the target automobile frame under each single mechanical loading i , Wherein, μ′ and L′ represent the number and length of cracks of set reference, respectively, and q represents the number of frame components.

8. The comprehensive mechanical testing collaborative loading system according to claim 5 is characterized by: The specific method of performing multi-comprehensive mechanical loading on the target automobile frame is: combining each single mechanics in pairs to obtain each combined mechanics, and evaluating whether the loading point position and loading force of the target automobile frame under each combined mechanics loading are accurate in the same way as the evaluation method of whether the loading point position and loading force of the target automobile frame under each single mechanics loading are accurate; when the loading point position and loading force of the target automobile frame under each combined mechanics loading are accurate, collecting detection information of the target automobile frame under each combined mechanics loading.

9. A comprehensive mechanical testing collaborative loading system according to claim 8, characterized in that: The specific process of analyzing the quality reliability of the target automobile frame under multi-comprehensive mechanical loading is as follows: F1. Based on the detection information of the target automobile frame under each combined mechanical loading, the quality reliability of the target automobile frame under each combined mechanical loading is calculated in the same way as the quality reliability of the target automobile frame under each single mechanical loading; F2. Compare the quality reliability of the target automobile frame under each combined mechanical loading with the quality reliability of the set reference combined mechanical loading. If the quality reliability of the target automobile frame under each combined mechanical loading is greater than the quality reliability of the set reference combined mechanical loading, the quality reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ1; F3. If any mass reliability of the target automobile frame under a certain combined mechanical loading is less than the mass reliability of the reference combined mechanical loading, the mass reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ2; F4. If the quality reliability of the target automobile frame under each combined mechanical loading is less than the quality reliability of the set reference combined mechanical loading, the quality reliability of the target automobile frame under the multi-comprehensive mechanical loading is recorded as τ3; F5. In summary, the quality reliability of the target automobile frame under multi-comprehensive mechanical loading is obtained. The value of is τ1 or τ2 or τ3, where τ1>τ2>τ3.

10. A comprehensive mechanical testing collaborative loading system according to claim 9, characterized in that: The specific process of analyzing the comprehensive quality reliability of the target automobile frame is as follows: G1. Based on the quality reliability of the target automobile frame under each single mechanical loading, the quality reliability of the target automobile frame under a single mechanical loading is analyzed in the same way as the quality reliability of the target automobile frame under multiple comprehensive mechanical loadings. G2. Calculate the comprehensive quality reliability of the target automobile frame Among them, a4 and a5 represent the weights of the comprehensive quality reliability assessment corresponding to the quality reliability under the set multi-comprehensive mechanical loading and single mechanical loading, respectively, and a4+a5=1.

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