A mechanical performance testing system and method based on carriage floor

Abstract

The present invention belongs to the technical field of carriage floor testing, and specifically is a mechanical property testing system and method based on the carriage floor, wherein the system comprises a processor, a preparation rationality detection module, a loading monitoring module, a deformation analysis module and a display module; the present invention accurately judges the preparation status of the carriage floor before testing through the preparation rationality detection module, starts the loading device to perform a loading test on the carriage floor when a preparation qualified signal is generated, and the loading monitoring module analyzes the loading execution status of the loading process, and can accurately judge whether the loading operation of the corresponding test process meets the requirements, and analyzes the deformation status of the carriage floor in the corresponding test process through the deformation analysis module when a loading qualified signal is generated, so as to realize reasonable feedback on the mechanical properties of the carriage floor, and has a high degree of intelligence, and effectively ensures the accuracy of the mechanical property test results of the carriage floor.

Description

Technical Field

[0001] The invention relates to the technical field of carriage floor testing, and in particular to a mechanical property testing system and method based on a carriage floor. Background Art

[0002] The carriage floor refers to the floor structure laid at the bottom of the vehicle compartment. It is located at the bottom of the compartment and is an important part of the compartment. It supports the facilities, goods and passengers in the vehicle. The mechanical properties of the carriage floor directly affect the safety and durability of the entire vehicle.

[0003] When conducting mechanical property tests on the carriage floor, the deformation performance is mainly determined by applying pressure. Currently, it is difficult to reasonably determine the preparation status before the test, and it is impossible to accurately evaluate the loading performance and deformation performance after the test is completed, which is not conducive to ensuring the accuracy of the mechanical property test results of the carriage floor;

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

[0005] The purpose of the present invention is to provide a mechanical properties testing system and method based on a vehicle floor, which solves the problem that the prior art is difficult to reasonably judge the preparation status before the mechanical properties test of the vehicle floor, and is unable to accurately evaluate the loading performance and deformation performance after the test is completed, which is not conducive to ensuring the accuracy of the test results.

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

[0007] A mechanical property testing system based on a carriage floor, comprising a processor, a preparation rationality detection module, a loading monitoring module, a deformation analysis module and a display module;

[0008] Before the test, the carriage floor is fixed on the test bench by a clamping device, and the preparation rationality detection module detects and analyzes the fixing condition of the carriage floor and the test environment condition, generates a preparation unreasonable signal or a preparation qualified signal through the analysis, and sends the preparation unreasonable signal or the preparation qualified signal to the display module through the processor;

[0009] When the qualified preparation signal is generated, the operator starts the loading device, and the loading device performs a loading test on the carriage floor. The loading monitoring module analyzes the loading execution status of the loading process, generates a qualified loading signal or a loading abnormality signal through the analysis, and sends the qualified loading signal or the loading abnormality signal to the display module through the processor;

[0010] When generating a loading qualification signal, the deformation analysis module analyzes the deformation condition of the car floor during the corresponding test process, and generates a deformation test failure signal or a deformation test normal signal through analysis, and sends the deformation test failure signal or the deformation test normal signal to the display module via the processor; the display module issues a warning when receiving an unreasonable preparation signal, an abnormal loading signal or a deformation test failure signal.

[0011] Furthermore, the preparation rationality detection module obtains the clamping judgment symbol JP-1 or JP-2 through clamping detection analysis, and obtains the ring inspection judgment symbol HP-1 or HP-2 through test ring inspection analysis, and performs intersection analysis on the clamping judgment symbol and the ring inspection judgment symbol. If JP-2∩HP-2 is obtained, a qualified preparation signal is generated, and in other cases, an unreasonable preparation signal is generated.

[0012] Furthermore, the specific analysis process of clamping detection analysis is as follows:

[0013] A plurality of contact points between the clamping device and the carriage floor are collected, the extrusion pressure on the corresponding contact points is collected and marked as the positioning point pressure value, the deviation value of the positioning point pressure value corresponding to the preset positioning point pressure standard value is marked as the positioning point deviation value, the positioning point deviation value is numerically compared with the preset positioning point deviation threshold value, and if the positioning point deviation value exceeds the preset positioning point deviation threshold value, the corresponding contact point is marked as a non-preferential pressure point;

[0014] If there is a non-preferential pressure point, the clamping judgment symbol JP-1 is assigned; if there is no non-preferential pressure point, the positioning point deviations of all contact points are averaged to obtain the positioning pressure value, and the positioning point deviation with the largest value is marked as the positioning point amplitude; the clamping detection value is obtained by numerically calculating the positioning pressure value and the positioning point amplitude, and the clamping detection value is numerically compared with the preset clamping detection threshold. If the clamping detection value exceeds the preset clamping detection threshold, the clamping judgment symbol JP-1 is assigned; if the clamping detection value does not exceed the preset clamping detection threshold, the clamping judgment symbol JP-2 is assigned.

[0015] Furthermore, the specific analysis process of the test ring inspection analysis is as follows:

[0016] The ambient temperature value, ambient humidity value and ambient air pressure value of the test environment of the carriage floor are collected, and the deviation value of the ambient temperature value compared with the appropriate test temperature value is marked as the temperature abnormality value. Similarly, the humidity abnormality value and the air pressure abnormality value are obtained, and the vibration data of the test environment of the carriage floor is collected and marked as the vibration abnormality value;

[0017] The environmental comprehensive abnormality value is obtained by numerically calculating the temperature abnormality value, humidity abnormality value, air pressure abnormality value and vibration abnormality value, and the environmental comprehensive abnormality value is numerically compared with the preset environmental comprehensive abnormality threshold value. If the environmental comprehensive abnormality value exceeds the preset environmental comprehensive abnormality threshold value, the environmental inspection judgment symbol HP-1 is assigned; if the environmental comprehensive abnormality value does not exceed the preset environmental comprehensive abnormality threshold value, the environmental inspection judgment symbol HP-2 is assigned.

[0018] Furthermore, the specific operation process of loading the monitoring module includes:

[0019] The loading time and final loading force of the loading device in the corresponding test process are obtained, and the loading time and final loading force are numerically compared with the preset loading time range and the preset final loading force range respectively. If the loading time or the final loading force is not within the corresponding preset range, a loading abnormality signal is generated.

[0020] Furthermore, if the loading duration and the final loading force are both within the corresponding preset range, the loading force variation curve of the loading device during the corresponding test process is collected, and the loading force variation curve is placed in a rectangular coordinate system located in the first quadrant, and the X-axis of the rectangular coordinate system represents time and the Y-axis represents the loading force value; a number of detection points are marked in the loading force variation curve, and the time intervals between two adjacent detection points are the same;

[0021] The vertical distance between two adjacent groups of detection points is collected and marked as a loading force detection value, the variance of all loading force detection values ​​is calculated to obtain a loading force table value, the loading force table value is numerically compared with a preset loading force table threshold, and if the loading force table value exceeds the preset loading force table threshold, a loading abnormality signal is generated;

[0022] If the load force table value does not exceed the preset load force table threshold, the load force check value is numerically compared with the preset load force check value range. If the load force check value is not within the preset load force check value range, the corresponding load force check value is marked as a load abnormal check value, and the deviation value between the corresponding load abnormal check value and the preset load force check value range is marked as a load abnormal table value;

[0023] The number of load anomaly inspection values ​​is obtained and marked as load number anomaly values, the load anomaly value with the largest numerical value is marked as the load amplitude anomaly value, and the average of all load anomaly values ​​is marked as the load analysis value; the load comprehensive inspection value is obtained by numerically calculating the load number anomaly values, the load amplitude anomaly values ​​and the load analysis value, and the load comprehensive inspection value is numerically compared with the preset load comprehensive inspection threshold value. If the load comprehensive inspection value exceeds the preset load comprehensive inspection threshold value, a load abnormality signal is generated; if the load comprehensive inspection value does not exceed the preset load comprehensive inspection threshold value, a load qualified signal is generated.

[0024] Furthermore, the specific analysis process of the deformation analysis module is as follows:

[0025] The final deformation of the carriage floor is collected and marked as a deformation detection value, and the deformation curve of the carriage floor during the corresponding test process is collected, and several deformation peak points in the deformation curve are obtained. The ratio of the deformation growth value to the interval time between two adjacent groups of deformation peak points is marked as a deformation increase value, all deformation increase values ​​are averaged to obtain a deformation increase value, and the deformation increase value is numerically compared with a preset deformation increase threshold value. If the deformation increase value exceeds the preset deformation increase threshold value, the corresponding deformation increase value is marked as a deformation abnormal increase value, and the number of deformation abnormal increase values ​​is marked as a deformation abnormal measurement value;

[0026] The deformation analysis value is obtained by numerically calculating the deformation detection value, deformation enhancement value and deformation anomaly value, and the deformation analysis value is numerically compared with the preset deformation analysis threshold. If the deformation analysis value exceeds the preset deformation analysis threshold, a deformation test failure signal is generated; if the deformation analysis value does not exceed the preset deformation analysis threshold, a deformation test pass signal is generated.

[0027] Furthermore, the processor is communicated with the test control and analysis module, which is used to set a control period, analyze the test control performance of the car floor during the control period, generate a test control qualified signal or a test control unqualified signal through the analysis, and send the test control qualified signal or the test control unqualified signal to the display module via the processor. The display module issues a warning when receiving the test control unqualified signal.

[0028] Furthermore, the specific analysis process of the test control and analysis module is as follows:

[0029] The number of carriage floor tests performed during the control period is collected and marked as the carriage floor frequency measurement value, and the ratio of the number of tests during the control period that exceeds the preset total test time threshold to the carriage floor frequency measurement value is marked as an inefficient frequency measurement value, and the total test time of all tests during the control period is averaged to obtain a test time analysis value;

[0030] The total number of erroneous operations performed by the operator when performing the car floor test during the control period is collected and its ratio to the car floor frequency measurement value is marked as the erroneous operation detection value. The test control evaluation value is obtained by numerically calculating the inefficient frequency measurement value, the test analysis value and the erroneous operation detection value. The test control evaluation value is numerically compared with the preset test control evaluation threshold. If the test control evaluation value exceeds the preset test control evaluation threshold, a test control unqualified signal is generated; if the test control evaluation value does not exceed the preset test control evaluation threshold, a test control qualified signal is generated.

[0031] Furthermore, the present invention also proposes a mechanical property testing method based on a carriage floor, comprising the following steps:

[0032] Step 1: Fix the carriage floor on the test bench by means of a clamping device;

[0033] Step 2: Detect and analyze the fixing condition of the carriage floor and the test environment condition, and generate an unreasonable preparation signal or a qualified preparation signal through analysis;

[0034] Step 3: When the qualified preparation signal is generated, the loading device is started, and the loading device performs a loading test on the carriage floor;

[0035] Step 4: Analyze the loading execution status of the loading process, and generate a loading qualified signal or a loading abnormal signal through the analysis;

[0036] Step 5: When generating a qualified loading signal, the deformation condition of the car floor during the corresponding test process is analyzed, and a deformation test unqualified signal or a deformation test normal signal is generated through the analysis.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. In the present invention, the preparation rationality detection module accurately judges the preparation status of the carriage floor before the test, and when the preparation qualified signal is generated, the loading device is started to perform a loading test on the carriage floor. The loading monitoring module accurately judges whether the loading operation of the corresponding test process meets the requirements. When the loading qualified signal is generated, the deformation analysis module analyzes the deformation status of the carriage floor during the corresponding test process, thereby realizing reasonable feedback on the mechanical properties of the carriage floor. The intelligent degree is high, and the accuracy of the test results of the mechanical properties of the carriage floor is effectively guaranteed;

[0039] 2. In the present invention, the test control performance of the car floor during the control period is analyzed by the test control analysis module, and a test control qualified signal or a test control unqualified signal is generated through the analysis. When the test control unqualified signal is generated, the display module issues an early warning, and the test supervision and personnel training of the car floor are strengthened in time in the subsequent period, thereby ensuring the subsequent test efficiency and being beneficial to the safety and stability of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings;

[0041] Figure 1 This is a system block diagram of Embodiment 1 of the present invention;

[0042] Figure 2 This is a system block diagram of Embodiment 2 of the present invention;

[0043] Figure 3 This is a flow chart of the method of Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0044] 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.

[0045] Embodiment 1: Figure 1 As shown, the present invention proposes a mechanical property testing system based on a carriage floor, comprising a processor, a preparation rationality detection module, a loading monitoring module, a deformation analysis module and a display module;

[0046] Before the test, the car floor is fixed on the test bench by a clamping device, and the preparation rationality detection module detects and analyzes the fixing condition of the car floor and the test environment condition, and generates an unreasonable preparation signal or a qualified preparation signal through analysis, and the unreasonable preparation signal or the qualified preparation signal is sent to the display module through the processor, which can reasonably analyze and accurately judge the preparation condition before the test of the car floor, and promptly remind the operator to make corresponding adjustment and improvement measures when the unreasonable preparation signal is generated, which is conducive to ensuring the smooth and stable test process and improving the accuracy of the test results;

[0047] Specifically, the preparation rationality detection module obtains the clamping judgment symbol JP-1 or JP-2 through clamping detection analysis, and obtains the ring inspection judgment symbol HP-1 or HP-2 through test ring inspection analysis, and performs intersection analysis on the clamping judgment symbol and the ring inspection judgment symbol. If JP-2∩HP-2 is obtained, it indicates that there is no abnormality in the preparation operation before the car floor test, and a preparation qualification signal is generated. The other cases (JP-1∩HP-1, JP-1∩HP-2 and JP-2∩HP-1) indicate that there is an abnormality in the preparation operation before the car floor test, and a preparation unreasonable signal is generated.

[0048] The specific analysis process of the clamping detection analysis is as follows: a number of contact points between the clamping device and the car floor are collected, the extrusion pressure on the corresponding contact points is collected and marked as the positioning point pressure value, the deviation value of the positioning point pressure value corresponding to the preset positioning point pressure standard value is marked as the positioning point deviation value, and the positioning point deviation value is numerically compared with the preset positioning point deviation threshold value. If the positioning point deviation value exceeds the preset positioning point deviation threshold value, it indicates that the positioning condition of the corresponding contact point is not good, and the corresponding contact point is marked as a non-optimal pressure point;

[0049] If there is a non-optimal pressure point, it indicates that the fixing performance of the carriage floor is poor, and the clamping judgment symbol JP-1 is assigned; if there is no non-optimal pressure point, the positioning point deviation values ​​of all contact points are averaged to obtain the positioning pressure value, and the positioning point deviation value with the largest value is marked as the positioning point amplitude;

[0050] The clamping detection value XP is obtained by numerically calculating the positioning pressure value XL and the positioning point amplitude XS through the formula XP=(eu1*XL+eu2*XS) / 2; wherein eu1 and eu2 are preset weight coefficients, eu1>eu2>0; and the larger the value of the clamping detection value XP is, the worse the fixing performance of the carriage floor is in general;

[0051] The clamping detection value is numerically compared with the preset clamping detection threshold. If the clamping detection value exceeds the preset clamping detection threshold, indicating that the fixing performance of the car floor is poor, the clamping judgment symbol JP-1 is assigned; if the clamping detection value does not exceed the preset clamping detection threshold, indicating that the fixing performance of the car floor is good, the clamping judgment symbol JP-2 is assigned.

[0052] Furthermore, the specific analysis process of the test environment inspection analysis is as follows: the ambient temperature value, ambient humidity value and ambient air pressure value of the test environment where the car floor is located are collected, and the deviation value of the ambient temperature value compared to the appropriate test temperature value is marked as the temperature abnormality value, and the humidity abnormality value and air pressure abnormality value are obtained in the same way, and the vibration data of the test environment where the car floor is located is collected and marked as the vibration abnormality value;

[0053] The temperature abnormality value ZS, the humidity abnormality value ZD, the air pressure abnormality value ZY and the vibration abnormality value ZN are numerically calculated by the formula ZW=(eq1*ZS+eq2*ZD+eq3*ZY+eq4*ZN) / 4 to obtain the environment comprehensive abnormality value ZW, wherein eq1, eq2, eq3 and eq4 are preset proportional coefficients with values ​​greater than zero, and the larger the value of the environment comprehensive abnormality value ZW is, the worse the test environment performance for the vehicle floor is in general;

[0054] The environmental comprehensive difference value ZW is numerically compared with the preset environmental comprehensive difference threshold. If the environmental comprehensive difference value ZW exceeds the preset environmental comprehensive difference threshold, it indicates that the test environment for testing the car floor is poor on the whole and the test environment needs to be adjusted, then the environmental inspection judgment symbol HP-1 is assigned; if the environmental comprehensive difference value ZW does not exceed the preset environmental comprehensive difference threshold, it indicates that the test environment for testing the car floor is good on the whole and the environmental inspection judgment symbol HP-2 is assigned.

[0055] When the qualified preparation signal is generated, the operator starts the loading device (the loading device is driven by an AC servo motor, and realizes uniform loading of the car floor through a precise transmission mechanism, which can simulate mechanical effects such as pressure under different working conditions). The loading device performs a loading test on the car floor. The loading monitoring module analyzes the loading execution status of the loading process, generates a qualified loading signal or a loading abnormality signal through analysis, and sends the qualified loading signal or the loading abnormality signal to the display module through the processor, which can accurately determine whether the loading operation of the corresponding test process meets the requirements, and stop the deformation analysis of the car floor when it is determined that it does not meet the requirements, thereby ensuring the accuracy of the corresponding analysis results; the specific operation process of the loading monitoring module is as follows:

[0056] The loading time and final loading force of the loading device in the corresponding test process are obtained, and the loading time and final loading force are numerically compared with the preset loading time range and the preset final loading force range respectively. If the loading time or the final loading force is not within the corresponding preset range, indicating that the corresponding test process does not meet the requirements, a loading abnormality signal is generated.

[0057] Furthermore, if the loading duration and the final loading force are both within the corresponding preset range, the loading force variation curve of the loading device during the corresponding test process is collected, and the loading force variation curve is placed in a rectangular coordinate system located in the first quadrant, and the X-axis of the rectangular coordinate system represents time and the Y-axis represents the loading force value; a number of detection points are marked in the loading force variation curve, and the time intervals between two adjacent detection points are the same;

[0058] The vertical distance between two adjacent groups of detection points is collected and marked as a loading force detection value, wherein the larger the value of the loading force detection value is, the faster the loading speed is within the corresponding interval; the variance of all loading force detection values ​​is calculated to obtain a loading force table value, and the loading force table value is numerically compared with a preset loading force table threshold value. If the loading force table value exceeds the preset loading force table threshold value, it indicates that the loading force change of the loading device is more unstable, and a loading abnormality signal is generated;

[0059] If the load force table value does not exceed the preset load force table threshold, the load force check value is numerically compared with the preset load force check value range. If the load force check value is not within the preset load force check value range, the corresponding load force check value is marked as a load abnormal check value, and the deviation value between the corresponding load abnormal check value and the preset load force check value range is marked as a load abnormal table value;

[0060] The number of load deviation values ​​is obtained and marked as load number deviation values, the load deviation value with the largest value is marked as load amplitude deviation value, and the mean of all load deviation values ​​is marked as load analysis value;

[0061] The loading number difference LS, the loading amplitude difference LP and the loading analysis value LZ are numerically calculated by the formula LX=rk1*LS+(rk2*LP+rk3*LZ) / rk1 to obtain the loading comprehensive inspection value LX; wherein rk1, rk2 and rk3 are preset proportional coefficients, rk1>rk2>rk3>0; and the larger the value of the loading comprehensive inspection value LX, the worse the loading performance of the loading device in the corresponding test process is in general;

[0062] The loading comprehensive inspection value LX is numerically compared with the preset loading comprehensive inspection threshold. If the loading comprehensive inspection value LX exceeds the preset loading comprehensive inspection threshold, it indicates that the loading performance of the loading device during the corresponding test is generally poor, and a loading abnormality signal is generated; if the loading comprehensive inspection value LX does not exceed the preset loading comprehensive inspection threshold, it indicates that the loading performance of the loading device during the corresponding test is generally good, and a loading qualified signal is generated.

[0063] When generating a qualified loading signal, the deformation analysis module analyzes the deformation condition of the car floor during the corresponding test, generates a deformation test unqualified signal or a deformation test normal signal through analysis, and sends the deformation test unqualified signal or the deformation test normal signal to the display module through the processor, which can reasonably evaluate the compression deformation performance of the car floor and realize feedback on the mechanical properties of the car floor; the specific analysis process of the deformation analysis module is as follows:

[0064] The final deformation of the carriage floor is collected and marked as a deformation detection value, and the deformation curve of the carriage floor during the corresponding test process is collected, and several deformation peak points in the deformation curve are obtained. The ratio of the deformation growth value to the interval time between two adjacent groups of deformation peak points is marked as a deformation increase value, all deformation increase values ​​are averaged to obtain a deformation increase value, and the deformation increase value is numerically compared with a preset deformation increase threshold value. If the deformation increase value exceeds the preset deformation increase threshold value, the corresponding deformation increase value is marked as a deformation abnormal increase value, and the number of deformation abnormal increase values ​​is marked as a deformation abnormal measurement value;

[0065] By formula The deformation detection value HK, the deformation enhancement value HQ and the deformation abnormal measurement value HY are numerically calculated to obtain the deformation analysis value HM; wherein np1, np2 and np3 are preset proportional coefficients with values ​​greater than zero, and the larger the value of the deformation analysis value HM is, the less the deformation performance of the carriage floor meets the requirements, and the worse the mechanical properties of the carriage floor are;

[0066] The deformation analysis value HM is numerically compared with the preset deformation analysis threshold. If the deformation analysis value HM exceeds the preset deformation analysis threshold, it indicates that the deformation performance of the car floor does not meet the requirements and the mechanical properties of the car floor are poor, then a deformation test failure signal is generated; if the deformation analysis value HM does not exceed the preset deformation analysis threshold, it indicates that the mechanical properties of the car floor are good, then a deformation test pass signal is generated.

[0067] The display module issues an early warning when it receives an unreasonable preparation signal, an abnormal loading signal, or a deformation test failure signal. It can provide timely early warning of corresponding abnormalities, thereby reminding operators to take corresponding handling measures, reducing the difficulty of test operations, and has a high degree of intelligence.

[0068] Embodiment 2: Figure 2 As shown, the difference between this embodiment and the first embodiment is that the processor is communicatively connected to the test control analysis module, and the test control analysis module is used to set the control period, preferably, the control period is ten days; the test control performance of the carriage floor during the control period is analyzed, and a test control qualified signal or a test control unqualified signal is generated through the analysis;

[0069] The test control qualified signal or the test control unqualified signal is sent to the display module through the processor. When the display module receives the test control unqualified signal, it issues an early warning, so as to strengthen the test supervision and personnel training of the carriage floor in the future, thereby ensuring the subsequent test efficiency and facilitating the safety and stability of the test process; the specific analysis process of the test control analysis module is as follows:

[0070] The number of carriage floor tests performed during the control period is collected and marked as the carriage floor frequency measurement value, and the total test duration of each carriage floor test during the control period is collected, and the total test duration is numerically compared with a preset total test duration threshold, and the ratio of the number of tests during the control period whose total test duration exceeds the preset total test duration threshold to the carriage floor frequency measurement value is marked as an inefficient frequency measurement value, and the total test duration of all tests during the control period is averaged to obtain a test time analysis value;

[0071] The total number of wrong operations performed by operators during the control period when testing the carriage floor is collected and the ratio of the number to the carriage floor frequency measurement value is marked as the wrong operation detection value;

[0072] By formula The inefficient frequency measurement value QX, the test time analysis value QS and the error operation detection value QF are numerically calculated to obtain the test control evaluation value QP; wherein, a1, a2, a3 are preset proportional coefficients, and the values ​​of a1, a2, a3 are all positive numbers; and the larger the value of the test control evaluation value QP, the worse the control performance of the carriage floor test during the control period;

[0073] The test control evaluation value QP is numerically compared with the preset test control evaluation threshold. If the test control evaluation value QP exceeds the preset test control evaluation threshold, indicating that the control performance of the car floor test during the control period is poor, then a test control unqualified signal is generated; if the test control evaluation value QP does not exceed the preset test control evaluation threshold, indicating that the control performance of the car floor test during the control period is good, then a test control qualified signal is generated.

[0074] Embodiment 3: Figure 3 As shown, the difference between this embodiment and the first and second embodiments is that the present invention proposes a mechanical property testing method based on a vehicle floor, comprising the following steps:

[0075] Step 1: Fix the carriage floor on the test bench by means of a clamping device;

[0076] Step 2: Detect and analyze the fixing condition of the carriage floor and the test environment condition, and generate an unreasonable preparation signal or a qualified preparation signal through analysis;

[0077] Step 3: When the qualified preparation signal is generated, the loading device is started, and the loading device performs a loading test on the carriage floor;

[0078] Step 4: Analyze the loading execution status of the loading process, and generate a loading qualified signal or a loading abnormal signal through the analysis;

[0079] Step 5: When generating a qualified loading signal, the deformation condition of the car floor during the corresponding test process is analyzed, and a deformation test unqualified signal or a deformation test normal signal is generated through the analysis.

[0080] The working principle of the present invention is as follows: when in use, the fixing condition and the test environment condition of the car floor are detected and analyzed before the test through the preparation rationality detection module, so that the preparation condition before the test of the car floor can be reasonably analyzed and accurately judged, and when an unreasonable preparation signal is generated, the operator is promptly reminded to make corresponding adjustment and improvement measures, and when a qualified preparation signal is generated, the loading device is started to perform a loading test on the car floor, and the loading monitoring module analyzes the loading execution status of the loading process, and can accurately judge whether the loading operation of the corresponding test process meets the requirements, and when a qualified loading signal is generated, the deformation condition of the car floor in the corresponding test process is analyzed through the deformation analysis module, so that the compressive deformation performance of the car floor can be reasonably evaluated, and the feedback on the mechanical properties of the car floor can be realized. It has a high degree of intelligence and effectively ensures the accuracy of the test results of the mechanical properties of the car floor.

[0081] The above formulas are all dimensionless and numerical calculations. The formula is a formula obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The preset parameters in the formula are set by technicians in this field according to actual conditions. The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that technicians in the relevant technical field can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A mechanical property testing system based on a carriage floor, characterized in that: It includes a processor, a preparation rationality detection module, a loading monitoring module, a deformation analysis module and a display module; Before the test, the carriage floor is fixed on the test bench by a clamping device, and the preparation rationality detection module detects and analyzes the fixing condition of the carriage floor and the test environment condition, generates a preparation unreasonable signal or a preparation qualified signal through the analysis, and sends the preparation unreasonable signal or the preparation qualified signal to the display module through the processor; When the qualified preparation signal is generated, the operator starts the loading device, and the loading device performs a loading test on the carriage floor. The loading monitoring module analyzes the loading execution status of the loading process, generates a qualified loading signal or a loading abnormality signal through the analysis, and sends the qualified loading signal or the loading abnormality signal to the display module through the processor; When generating a qualified loading signal, the deformation analysis module analyzes the deformation condition of the car floor during the corresponding test process, generates a deformation test unqualified signal or a deformation test normal signal through analysis, and sends the deformation test unqualified signal or the deformation test normal signal to the display module through the processor; the display module issues an early warning when receiving an unreasonable preparation signal, an abnormal loading signal or a deformation test unqualified signal; The specific analysis process of the deformation analysis module is as follows: The final deformation of the carriage floor is collected and marked as a deformation detection value, and the deformation curve of the carriage floor during the corresponding test process is collected, and several deformation peak points in the deformation curve are obtained. The ratio of the deformation growth value to the interval time between two adjacent groups of deformation peak points is marked as a deformation increase value, all deformation increase values ​​are averaged to obtain a deformation increase value, and the deformation increase value is numerically compared with a preset deformation increase threshold value. If the deformation increase value exceeds the preset deformation increase threshold value, the corresponding deformation increase value is marked as a deformation abnormal increase value, and the number of deformation abnormal increase values ​​is marked as a deformation abnormal measurement value; The deformation analysis value is obtained by numerically calculating the deformation detection value, the deformation enhancement value and the deformation abnormal measurement value. If the deformation analysis value exceeds the preset deformation analysis threshold, a deformation test failure signal is generated; If the deformation analysis value does not exceed the preset deformation analysis threshold, a deformation test pass signal is generated.

2. A mechanical property testing system based on a vehicle floor according to claim 1, characterized in that: The preparation rationality detection module obtains the clamping judgment symbol JP-1 or JP-2 through clamping detection analysis, and obtains the ring inspection judgment symbol HP-1 or HP-2 through test ring inspection analysis, and performs intersection analysis on the clamping judgment symbol and the ring inspection judgment symbol. If JP-2∩HP-2 is obtained, a qualified preparation signal is generated, and in other cases, an unreasonable preparation signal is generated.

3. A mechanical property testing system based on a vehicle floor according to claim 2, characterized in that: The specific analysis process of clamping detection analysis is as follows: A plurality of contact points between the clamping device and the carriage floor are collected, the extrusion pressure on the corresponding contact points is collected and marked as the positioning point pressure value, and the deviation value of the positioning point pressure value corresponding to the preset positioning point pressure standard value is marked as the positioning point deviation value. If the positioning point deviation value exceeds the preset positioning point deviation threshold value, the corresponding contact point is marked as a non-optimal pressure point; If there is a non-preferential pressure point, the clamping judgment symbol JP-1 is assigned; if there is no non-preferential pressure point, the positioning point deviations of all contact points are averaged to obtain the positioning pressure value, and the positioning point deviation with the largest value is marked as the positioning point amplitude; the clamping detection value is obtained by numerically calculating the positioning pressure value and the positioning point amplitude. If the clamping detection value exceeds the preset clamping detection threshold, the clamping judgment symbol JP-1 is assigned; if the clamping detection value does not exceed the preset clamping detection threshold, the clamping judgment symbol JP-2 is assigned.

4. A mechanical property testing system based on a vehicle floor according to claim 2, characterized in that: The specific analysis process of the test ring inspection analysis is as follows: The ambient temperature value, ambient humidity value and ambient air pressure value of the test environment of the carriage floor are collected, and the deviation value of the ambient temperature value compared with the appropriate test temperature value is marked as the temperature abnormality value. Similarly, the humidity abnormality value and the air pressure abnormality value are obtained, and the vibration data of the test environment of the carriage floor is collected and marked as the vibration abnormality value; The environmental comprehensive abnormality value is obtained by numerically calculating the temperature abnormality value, humidity abnormality value, air pressure abnormality value and vibration abnormality value. If the environmental comprehensive abnormality value exceeds the preset environmental comprehensive abnormality threshold, the environmental inspection judgment symbol HP-1 is assigned; if the environmental comprehensive abnormality value does not exceed the preset environmental comprehensive abnormality threshold, the environmental inspection judgment symbol HP-2 is assigned.

5. The mechanical property testing system based on the vehicle floor according to claim 1 is characterized in that: The specific operation process of loading the monitoring module includes: The loading time and final loading force of the loading device in the corresponding test process are obtained, and the loading time and final loading force are numerically compared with the preset loading time range and the preset final loading force range respectively. If the loading time or the final loading force is not within the corresponding preset range, a loading abnormality signal is generated.

6. A mechanical property testing system based on a vehicle floor according to claim 5, characterized in that: If the loading duration and the final loading force are both within the corresponding preset range, the loading force variation curve of the loading device during the corresponding test process is collected, and the loading force variation curve is placed in a rectangular coordinate system located in the first quadrant, and the X-axis of the rectangular coordinate system represents time and the Y-axis represents the loading force value; a number of detection points are marked in the loading force variation curve, and the time intervals between two adjacent detection points are the same; The vertical distance between two adjacent groups of detection points is collected and marked as a loading force detection value, and the variance of all loading force detection values ​​is calculated to obtain a loading force table value. If the loading force table value exceeds a preset loading force table threshold, a loading abnormality signal is generated; If the load force table value does not exceed the preset load force table threshold, the load force check value is numerically compared with the preset load force check value range. If the load force check value is not within the preset load force check value range, the corresponding load force check value is marked as a load abnormal check value, and the deviation value between the corresponding load abnormal check value and the preset load force check value range is marked as a load abnormal table value; The number of load anomaly inspection values ​​is obtained and marked as load number anomaly values, the load anomaly value with the largest numerical value is marked as the load amplitude anomaly value, and the mean of all load anomaly values ​​is marked as the load analysis anomaly value; the load comprehensive inspection value is obtained by numerically calculating the load number anomaly values, the load amplitude anomaly values ​​and the load analysis anomaly values; if the load comprehensive inspection value exceeds the preset load comprehensive inspection threshold, a load abnormality signal is generated; if the load comprehensive inspection value does not exceed the preset load comprehensive inspection threshold, a load qualified signal is generated.

7. The mechanical property testing system based on the vehicle floor according to claim 1 is characterized in that: The processor is communicated with the test control and analysis module. The test control and analysis module is used to set the control period, analyze the test control performance of the car floor during the control period, generate a test control qualified signal or a test control unqualified signal through the analysis, and send the test control qualified signal or the test control unqualified signal to the display module via the processor. The display module issues a warning when receiving the test control unqualified signal.

8. A mechanical property testing system based on a vehicle floor according to claim 7, characterized in that: The specific analysis process of the test control and analysis module is as follows: The number of carriage floor tests performed during the control period is collected and marked as the carriage floor frequency measurement value, and the ratio of the number of tests during the control period that exceeds the preset total test time threshold to the carriage floor frequency measurement value is marked as an inefficient frequency measurement value, and the total test time of all tests during the control period is averaged to obtain a test time analysis value; The total number of incorrect operations performed by operators during the carriage floor test during the control period is collected and its ratio to the carriage floor frequency measurement value is marked as the incorrect operation detection value. The test control evaluation value is obtained by numerically calculating the inefficient frequency measurement value, the test time analysis value and the incorrect operation detection value. If the test control evaluation value exceeds the preset test control evaluation threshold, a test control unqualified signal is generated. If the test control evaluation value does not exceed the preset test control evaluation threshold, a test control qualified signal is generated.

9. A mechanical property testing method based on a carriage floor, characterized in that: The method adopts the mechanical property testing system based on the vehicle floor as described in any one of claims 1-8.

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