Automobile jack displacement benchmarking test method and device, electronic equipment and medium
By acquiring physical test data of automotive jacks, determining key deformation parameters, and calibrating simulation models, the problem of existing technologies being unable to meet automotive simulation benchmarking requirements has been solved, resulting in a reduction in overall vehicle costs and an improvement in market competitiveness.
Patent Information
- Application Number
- CN202511636888.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-02-10
AI Technical Summary
Existing technologies cannot meet the various requirements for automotive simulation benchmarking, leading to increased vehicle costs and reduced market competitiveness.
By acquiring physical test data of the target object, key deformation parameters are determined using interpolation calculations. A simulation model is then constructed or calibrated to match the output of the simulation model when simulating hydraulic jack lifting with the key deformation parameters. The calibrated simulation model is then used for performance prediction and optimization.
It meets various automotive simulation benchmarking needs, avoids repeated changes during the testing phase, improves R&D efficiency, reduces overall vehicle costs, and enhances market competitiveness.
Smart Images
Figure CN121503038A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive technology, and in particular to a method, apparatus, electronic device, and medium for testing the displacement of an automotive jack. Background Technology
[0002] With the rapid development of the automotive industry and the booming domestic car market, OEMs face greater challenges in updating and iterating their products. To improve market competitiveness, enhancing vehicle R&D efficiency is crucial. In the R&D process, jack strength simulation analysis is a mandatory component, directly impacting vehicle maintenance safety, vehicle body reliability, and user experience. Therefore, simulation accuracy is a key factor in ensuring the accuracy of early-stage designs.
[0003] In related technologies, the calibration is generally performed on the lifting of the test itself or on the lifting of the jack itself. This cannot meet the various requirements of automotive simulation benchmarking, and thus cannot reduce the overall vehicle cost and reduce market competitiveness. Summary of the Invention
[0004] In view of this, the purpose of this invention is to provide a method, device, electronic device and medium for testing the displacement of an automotive jack, which meets various automotive simulation benchmarking requirements, avoids repeated changes in the testing phase, enables the whole vehicle to meet both strength and durability requirements, as well as process and layout requirements, improves R&D efficiency, and minimizes R&D costs, thereby reducing the overall vehicle cost and improving market competitiveness.
[0005] In a first aspect, embodiments of the present invention provide a method for displacement benchmarking testing of an automotive jack. The method includes: acquiring physical test data of a target object; the physical test data includes displacement measurements and load values under multiple loading conditions; determining key deformation parameters of the target object based on the physical test data through interpolation calculation; the key deformation parameters include maximum displacement and residual displacement; constructing or calibrating a simulation model based on the key deformation parameters so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters; and using the calibrated simulation model for performance prediction and optimization.
[0006] In a preferred embodiment of the present invention, the above-mentioned acquisition of physical test data of the target object includes: applying a test load to the lifting point of the target object using a hydraulic jack, and acquiring the load value through a pressure sensor integrated with the hydraulic jack; the target object is a white body frame; and acquiring displacement measurement values of the target object during loading and unloading processes through displacement sensors arranged on the front and rear sides of the lifting point.
[0007] In a preferred embodiment of the present invention, the displacement sensor is arranged in a flat area under the longitudinal beam with the same X-axis coordinate as the constraint positions of the front and rear shock absorbers of the body-in-white frame; the top of the hydraulic jack is provided with a structure simulating a horizontal jack tray. In a preferred embodiment of the present invention, the determination of key deformation parameters by interpolation calculation includes: based on the displacement measurement value, combined with the relative positional relationship between the lifting point and the constraint positions of the front and rear shock absorbers of the body, calculating the maximum deformation and residual deformation at the lifting point by linear interpolation.
[0008] In a preferred embodiment of the present invention, the maximum deformation is determined by the following formula: ;in, Indicates the maximum deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under maximum load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under maximum load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under maximum load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under maximum load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. The X-axis distance represents the constraint position of the front and rear shock absorbers on the same side of the vehicle body; the residual deformation is determined by the following formula: ;in, Indicates residual deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under unloaded load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under unloaded load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under unloaded load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under unloaded load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body.
[0009] In a preferred embodiment of the present invention, before obtaining the physical test data of the target object, the method further includes a preloading step: preloading the target object a preset number of times; when the displacement difference between two consecutive preloadings is less than a preset difference threshold, the formal test begins.
[0010] In a preferred embodiment of the present invention, the simulation model is a finite element model, and calibrating the simulation model includes: comparing the key deformation parameters obtained from the test with the corresponding parameters output by the simulation; adjusting the material parameters, boundary conditions or mesh density of the simulation model until the percentage error between the key deformation parameters and the corresponding parameters is less than a preset percentage threshold.
[0011] Secondly, embodiments of the present invention also provide an automotive jack displacement benchmarking test device, the device comprising: a physical test data acquisition module, used to acquire physical test data of a target object; the physical test data includes displacement measurements and load values under multiple loading conditions; a key deformation parameter determination module, used to determine key deformation parameters of the target object based on the physical test data through interpolation calculation; the key deformation parameters include maximum displacement and residual displacement; a matching module, used to construct or calibrate a simulation model based on the key deformation parameters, so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters; and a prediction and optimization module, used to perform performance prediction and optimization using the calibrated simulation model. Thirdly, embodiments of the present invention also provide an electronic device, including a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the automotive jack displacement benchmarking test method of the first aspect described above.
[0012] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions. When the computer-executable instructions are invoked and executed by a processor, the computer-executable instructions cause the processor to implement the automobile jack displacement benchmarking test method of the first aspect described above.
[0013] The embodiments of the present invention bring the following beneficial effects: This invention provides a method, apparatus, electronic device, and medium for automotive jack displacement benchmarking testing. By acquiring physical test data of the target object, including displacement measurements and load values under multiple loading conditions, and based on this data, key deformation parameters of the target object are determined through interpolation calculations. These key deformation parameters include maximum displacement and residual displacement. A simulation model is then constructed or calibrated based on these parameters to ensure that the output of the simulation model during simulated hydraulic jack lifting matches the key deformation parameters. The calibrated simulation model is then used for performance prediction and optimization. This approach satisfies various automotive simulation benchmarking requirements, avoids repeated changes during the testing phase, and ensures that the vehicle meets both strength and durability requirements as well as process and layout requirements, improving R&D efficiency and minimizing R&D costs, thereby reducing overall vehicle costs and enhancing market competitiveness.
[0014] Other features and advantages of this disclosure will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.
[0015] To make the above-mentioned objects, features and advantages of this disclosure more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0017] Figure 1 A flowchart of a method for testing the displacement of an automobile jack provided in an embodiment of the present invention; Figure 2 A flowchart of another method for testing the displacement of an automobile jack provided in an embodiment of the present invention; Figure 3 A schematic diagram of parameter positions provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an automobile jack displacement calibration testing device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] With the rapid development of the automotive industry and the booming domestic car market, OEMs face greater challenges in updating and iterating their products. To improve market competitiveness, enhancing vehicle R&D efficiency is crucial. In the R&D process, advanced virtual development tools are the core driving force. In the pre-research stage, improved simulation accuracy in areas such as vehicle safety, NVH (noise, vibration, and harshness), and structural durability can significantly reduce repeated modifications during later real-vehicle testing, greatly improving R&D efficiency. Therefore, the consistency between simulation and real-vehicle benchmarking is particularly important.
[0020] The simulation analysis of jack strength is a necessary item in the research and development process. It directly affects the vehicle maintenance safety, vehicle body reliability and user experience. Therefore, the accuracy of the simulation is a key factor in ensuring the early design.
[0021] In related technologies, the lifting of the test itself is generally used to make the jack more convenient and intelligent to use, thereby improving the user and tester experience. Alternatively, the lifting of the jack itself may be calibrated to calibrate the hydraulic pressure value of the jack. However, this cannot meet the various automotive simulation benchmarking requirements, thus failing to reduce the overall vehicle cost and lowering market competitiveness.
[0022] Based on this, the present invention provides a method, apparatus, electronic device, and medium for testing the displacement of an automotive jack, which can meet various automotive simulation benchmarking requirements, avoid repeated changes during the testing phase, and enable the entire vehicle to meet both strength and durability requirements as well as process and layout requirements, thereby improving R&D efficiency and minimizing R&D costs, thus reducing overall vehicle costs and enhancing market competitiveness. To facilitate understanding of this embodiment, the automotive jack displacement benchmarking test method disclosed in this invention will first be described in detail.
[0023] Example 1 This invention provides a method for testing the displacement of an automotive jack. Figure 1 This is a flowchart illustrating a method for testing the displacement of an automotive jack, as provided in an embodiment of the present invention. Figure 1 As shown, the method for testing the displacement of a car jack may include the following steps: Step S101: Obtain physical test data of the target object.
[0024] Here, the target object refers to the physical entity being tested. In the embodiments of this application, the target object can be the body-in-white frame, that is, the main steel structure of the vehicle after removing the doors, hood, chassis suspension, interior and exterior trim, etc.
[0025] The physical test data includes displacement measurements and load values under multiple loading conditions.
[0026] Among them, physical test data can be raw data obtained directly through physical experiments.
[0027] The displacement measurement value is the change in position of a specific point on the vehicle body during the loading process, measured using a displacement sensor or dial gauge, and is usually expressed in millimeters.
[0028] The load value is the magnitude of the force applied to the vehicle body by the jack, usually measured in Newtons or kilonewtons, and is monitored by a pressure sensor and recorded via a computer terminal.
[0029] The loading conditions can include multiple stages such as the initial state, gradually loading to the maximum load, and unloading.
[0030] Specifically, the body-in-white can be fixed on a test bench, and the mounting points of its front and rear shock absorbers can be constrained to simulate the contact between a real vehicle and the ground. Displacement sensors are arranged under the longitudinal beams of the body, and displacement sensors are also arranged in front of and behind the jack support points (at the door sills). The hydraulic jacks are started to apply force according to a preset program, and all sensors simultaneously collect displacement and force data.
[0031] Step S102: Based on physical test data, determine the key deformation parameters of the target object through interpolation calculation.
[0032] Interpolation calculation is used to estimate the value of an unknown position, such as the actual support point of a jack, based on known data points, such as the readings of the front and rear displacement sensors.
[0033] Among them, key deformation parameters are core indicators used to evaluate the stiffness and strength performance of a structure, including maximum displacement and residual displacement.
[0034] The maximum displacement is the maximum vertical deformation at the jack support point under the maximum load.
[0035] Among them, residual displacement is the amount of permanent deformation that cannot be recovered at the jack support point after unloading, which is used to determine whether the material has entered the plastic deformation stage.
[0036] Step S103: Construct or calibrate a simulation model based on key deformation parameters so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters.
[0037] In this process, a finite element model of the body-in-white can be built in CAE software, and the same constraints and loads as in the experiment can be applied. Then, the simulation can be run to obtain the maximum and residual displacements of the support points calculated by the simulation. The simulation results can be compared with the maximum and residual displacements calculated by the experiment. If the error is large, the simulation model can be modified.
[0038] Step S104: Use the calibrated simulation model to perform performance prediction and optimization.
[0039] Among these, validated models can be used to predict performance under other operating conditions or after minor modifications to the structure, and the lightest, cheapest, or most reliable structural design scheme can be found based on the model while meeting performance requirements.
[0040] The automotive jack displacement benchmarking test method provided in this invention can acquire physical test data of the target object, including displacement measurements and load values under multiple loading conditions. Based on the physical test data, key deformation parameters of the target object are determined through interpolation calculations. These key deformation parameters include maximum displacement and residual displacement. A simulation model is then constructed or calibrated based on these key deformation parameters to ensure that the output of the simulation model during simulated hydraulic jack lifting matches the key deformation parameters. The calibrated simulation model is then used for performance prediction and optimization. This method satisfies various automotive simulation benchmarking requirements, avoids repeated changes during the testing phase, and ensures that the vehicle meets both strength and durability requirements as well as process and layout requirements, improving R&D efficiency and minimizing R&D costs, thereby reducing overall vehicle costs and enhancing market competitiveness.
[0041] Example 2 This invention also provides another method for testing the displacement of an automotive jack; this method is implemented based on the method described in the above embodiments.
[0042] Figure 2 A flowchart of another method for testing the displacement of an automotive jack provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method for testing the displacement of a car jack may include the following steps: Step S201: Preload the target object a preset number of times.
[0043] The preset number of times can be three. The target object needs to be preloaded at least three times, and the load is 10% of the required load, in order to eliminate the initial displacement gap of the body-in-white in the test.
[0044] Step S202: When the displacement difference between two consecutive preloads is less than the preset difference threshold, the formal test begins.
[0045] For example, a system can be considered stable and ready for formal testing when the displacement difference between the third and fourth preloads at the maximum load is less than 0.5% of the full scale. This threshold difference is determined based on engineering experience or testing standards.
[0046] Step S203: Obtain physical test data of the target object.
[0047] The physical test data includes displacement measurements and load values under multiple loading conditions.
[0048] Specifically, obtaining physical test data of the target object may include: applying a test load to the lifting point of the target object using a hydraulic jack, and obtaining the load value through a pressure sensor integrated with the hydraulic jack; the target object is a white body frame; and obtaining displacement measurement values of the target object during loading and unloading processes through displacement sensors arranged on the front and rear sides of the lifting point.
[0049] The displacement sensor is located in the flat area under the longitudinal beam, which is in the same X-axis coordinate as the front and rear shock absorber constraint positions of the body-in-white frame; the top of the hydraulic jack is equipped with a structure that simulates a horizontal jack tray.
[0050] Among them, the constraint positions of the front and rear shock absorbers of the body-in-white frame are obtained, and displacement sensors or dial gauges are placed in the relatively flat area under the longitudinal beam of the body corresponding to the constraint positions, so that the X-axis coordinate of the placement position is the same as the X-axis coordinate of the constraint position of the front and rear shock absorbers. This is mainly to obtain the overall rigid displacement value of the body at the constraint point and eliminate the overall displacement of the body-in-white frame.
[0051] Specifically, the lifting position of the jack at the front of the vehicle door sill is selected, and a special jack lifting fixture is used. This is a jack with force monitoring function composed of hydraulic oil and pressure sensors. The top of the jack simulates the structure of a horizontal jack tray. The inside of the jack consists of hydraulic oil and pressure sensors. The pressure value is displayed on the computer terminal, and the load is applied by inputting the value into the computer terminal. This is mainly to simulate the lifting state when the customer is using it.
[0052] Displacement sensors or dial gauges are placed before and after the jack's special lifting fixture to test the displacement after loading and unloading.
[0053] Step S204: Based on the physical test data, determine the key deformation parameters of the target object through interpolation calculation; the key deformation parameters include the maximum displacement and the residual displacement.
[0054] Among them, determining key deformation parameters through interpolation calculation can include: based on displacement measurement values, combined with the relative positional relationship between the lift point and the constraint positions of the front and rear shock absorbers of the vehicle body, calculating the maximum deformation and residual deformation at the lift point through linear interpolation.
[0055] The maximum deformation is determined by the following formula: .
[0056] in, Indicates the maximum deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under maximum load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under maximum load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under maximum load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under maximum load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body.
[0057] The residual deformation is determined by the following formula: .
[0058] in, Indicates residual deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under unloaded load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under unloaded load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under unloaded load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under unloaded load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body.
[0059] To make it easier to understand the locations mentioned above, Figure 3 This is a schematic diagram of parameter positions provided for an embodiment of the present invention.
[0060] Step S205: Construct or calibrate a simulation model based on key deformation parameters so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters.
[0061] The simulation model is a finite element model.
[0062] Specifically, calibrating the simulation model may include: comparing the key deformation parameters obtained from the test with the corresponding parameters output by the simulation; adjusting the material parameters, boundary conditions, or mesh density of the simulation model until the percentage error between the key deformation parameters and the corresponding parameters is less than a preset percentage threshold.
[0063] Regarding adjusting material parameters, for example: if the simulated displacement is generally smaller than the test displacement, it may mean that the material's elastic modulus is set too high and needs to be lowered. If the simulated residual displacement value is too small, it may be necessary to adjust the material's plastic hardening curve.
[0064] Regarding adjusting boundary conditions, for example, the simulation of constraint positions may be overly idealized, and a slight degree of flexibility exists in actual experiments. During calibration, spring elements can be introduced to simulate this flexibility, and their stiffness values can be adjusted.
[0065] Regarding adjusting the mesh density, for example, densifying the mesh in stress concentration areas (such as near the jack support point) can yield more accurate local deformation results.
[0066] Step S206: Use the calibrated simulation model to perform performance prediction and optimization.
[0067] For example, predicting vehicle body deformation at different lifting points or with greater lifting force; assessing the impact of using different materials (such as high-strength steel and aluminum alloy) on the strength at the jack; and optimizing the shape or thickness of the vehicle body sill beam structure to achieve lightweighting while ensuring strength.
[0068] The embodiments of this application are applicable to various vehicle types, including SUVs, sedans, pickup trucks, and light commercial vehicles, and are used for simulation benchmarking and R&D verification.
[0069] Example 3 Corresponding to the above method embodiments, this invention provides a vehicle jack displacement calibration testing device. Figure 4 This is a schematic diagram of the structure of an automotive jack displacement calibration testing device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the automotive jack displacement calibration test device may include: The physical test data acquisition module 301 is used to acquire physical test data of the target object; the physical test data includes displacement measurements and load values under multiple loading conditions.
[0070] The key deformation parameter determination module 302 is used to determine the key deformation parameters of the target object based on physical test data through interpolation calculation; the key deformation parameters include the maximum displacement and the residual displacement.
[0071] Matching module 303 is used to build or calibrate a simulation model based on key deformation parameters so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters.
[0072] The prediction and optimization module 304 is used to predict and optimize performance using the calibrated simulation model.
[0073] The automotive jack displacement benchmarking testing device provided in this invention can acquire physical test data of the target object, including displacement measurements and load values under multiple loading conditions. Based on this physical test data, key deformation parameters of the target object are determined through interpolation calculations. These key deformation parameters include maximum displacement and residual displacement. A simulation model is then constructed or calibrated based on these key deformation parameters to ensure that the output of the simulation model during simulated hydraulic jack lifting matches the key deformation parameters. The calibrated simulation model is then used for performance prediction and optimization. This approach satisfies various automotive simulation benchmarking requirements, avoids repeated changes during the testing phase, and ensures that the vehicle meets both strength and durability requirements as well as process and layout requirements, improving R&D efficiency and minimizing R&D costs, thereby reducing overall vehicle costs and enhancing market competitiveness.
[0074] In some embodiments, the physical test data acquisition module is further configured to apply a test load to the lifting point of the target object using a hydraulic jack, and acquire the load value through a pressure sensor integrated with the hydraulic jack; the target object is a white body frame; and the displacement measurement value of the target object during loading and unloading is acquired through displacement sensors arranged on the front and rear sides of the lifting point.
[0075] In some embodiments, the displacement sensor is arranged in a flat area under the longitudinal beam that is in the same X-axis coordinate as the front and rear shock absorber constraint positions of the body-in-white frame; the top of the hydraulic jack is provided with a structure simulating a horizontal jack tray.
[0076] In some embodiments, the key deformation parameter determination module is also used to calculate the maximum deformation and residual deformation at the lift point by linear interpolation based on displacement measurements and the relative positional relationship between the lift point and the constraint positions of the front and rear shock absorbers of the vehicle body.
[0077] In some embodiments, the key deformation parameter determination module is further configured to determine the maximum deformation using the following formula: ;in, Indicates the maximum deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under maximum load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under maximum load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under maximum load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under maximum load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. The X-axis distance represents the constraint position of the front and rear shock absorbers on the same side of the vehicle body; the residual deformation is determined by the following formula: ;in, Indicates residual deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under unloaded load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under unloaded load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under unloaded load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under unloaded load. This indicates the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body.
[0078] In some embodiments, the physical test data acquisition module is further used to preload the target object a preset number of times; when the displacement difference between two consecutive preloads is less than a preset difference threshold, the formal test begins.
[0079] In some embodiments, the matching module is also used to compare the key deformation parameters obtained from the test with the corresponding parameters output by the simulation; and to adjust the material parameters, boundary conditions or mesh density of the simulation model until the percentage error between the key deformation parameters and the corresponding parameters is less than a preset percentage threshold.
[0080] The device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.
[0081] Example 4 This invention also provides an electronic device for running the above-described automotive jack displacement calibration test method; see [link to related documentation]. Figure 5 The diagram shows the structure of an electronic device, which includes a memory 400 and a processor 401. The memory 400 stores one or more computer instructions, which are executed by the processor 401 to implement the above-mentioned automobile jack displacement calibration test method.
[0082] Furthermore, Figure 5 The electronic device shown also includes a bus 402 and a communication interface 403. The processor 401, the communication interface 403 and the memory 400 are connected via the bus 402.
[0083] The memory 400 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 403 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 402 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.
[0084] Processor 401 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 401 or by instructions in software form. Processor 401 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly manifested as execution by a hardware decoding processor, or execution by a combination of hardware and software modules in the decoding processor. The software module can reside in a readily available storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, or registers. This storage medium is located in memory 400, and processor 401 reads information from memory 400 and, in conjunction with its hardware, completes the steps of the method described in the foregoing embodiments.
[0085] This invention also provides a computer-readable storage medium storing computer-executable instructions. When these computer-executable instructions are called and executed by a processor, they cause the processor to implement the above-described automobile jack displacement calibration test method. For specific implementation details, please refer to the method embodiments, which will not be repeated here.
[0086] The computer program product for performing a displacement calibration test of an automobile jack provided in this embodiment of the invention includes a computer-readable storage medium storing non-volatile program code executable by a processor. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation details, please refer to the method embodiments, which will not be repeated here.
[0087] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0088] In the several embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0089] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0090] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.
[0091] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.
[0092] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. A method for testing the displacement of an automotive jack, characterized in that, The method includes: Obtain physical test data of the target object; the physical test data includes displacement measurements and load values under multiple loading conditions; Based on the physical test data, the key deformation parameters of the target object are determined by interpolation calculation; the key deformation parameters include the maximum displacement and the residual displacement. A simulation model is constructed or calibrated based on the key deformation parameters so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters. Performance prediction and optimization are performed using the calibrated simulation model.
2. The method based on claim 1, characterized in that, The acquisition of physical test data for the target object includes: The hydraulic jack is used to apply a test load to the lifting point of the target object, and the load value is obtained by a pressure sensor integrated with the hydraulic jack; the target object is a white body frame. Displacement sensors arranged on the front and rear sides of the lifting point are used to acquire displacement measurements of the target object during the loading and unloading process.
3. The method based on claim 2, characterized in that, The displacement sensor is arranged in the flat area under the longitudinal beam, which is the same as the X-axis coordinate of the constraint position of the front and rear shock absorbers of the body-in-white frame; the top of the hydraulic jack is provided with a structure that simulates a horizontal jack tray.
4. The method based on claim 2, characterized in that, The determination of key deformation parameters through interpolation calculation includes: Based on the displacement measurement value, and combined with the relative positional relationship between the lifting point and the constraint positions of the front and rear shock absorbers of the vehicle body, the maximum deformation and residual deformation at the lifting point are calculated by linear interpolation.
5. The method based on claim 4, characterized in that, The maximum deformation is determined by the following formula: ; in, This indicates the maximum deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under maximum load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under maximum load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under maximum load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under maximum load. This represents the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body; The residual deformation is determined by the following formula: ; in, This indicates the residual deformation. This indicates the reading of the displacement sensor at the front of the lifting point under initial load. This indicates the reading of the displacement sensor at the front of the lifting point under unloaded load. This indicates the reading of the displacement sensor behind the lifting point under the initial load. This indicates the reading of the displacement sensor behind the lifting point under unloaded load. This indicates the reading of the front shock absorber under initial load. This indicates the reading of the front shock absorber under unloaded load. This indicates the reading of the rear shock absorber under initial load. This indicates the reading of the rear shock absorber under unloaded load. This represents the X-axis distance from the lifting point of the hydraulic jack to the front restraint position on the same side of the vehicle body. This indicates the X-axis distance between the front and rear shock absorber restraint positions on the same side of the vehicle body.
6. The method based on claim 1, characterized in that, Before acquiring the physical test data of the target object, the method further includes a preloading step: The target object is preloaded a preset number of times; When the displacement difference between two consecutive preloads is less than the preset difference threshold, the formal test begins.
7. The method based on claim 1, characterized in that, The simulation model is a finite element model, and the calibration simulation model includes: Compare the key deformation parameters obtained from the test with the corresponding parameters output by the simulation; The material parameters, boundary conditions, or mesh density of the simulation model are adjusted until the percentage error between the key deformation parameter and the corresponding parameter is less than a preset percentage threshold.
8. A displacement calibration testing device for automobile jacks, characterized in that, The device includes: The physical test data acquisition module is used to acquire physical test data of the target object; the physical test data includes displacement measurements and load values under multiple loading conditions; The key deformation parameter determination module is used to determine the key deformation parameters of the target object based on the physical test data through interpolation calculation; the key deformation parameters include the maximum displacement and the residual displacement. A matching module is used to construct or calibrate a simulation model based on the key deformation parameters, so that the output of the simulation model when simulating hydraulic jack lifting matches the key deformation parameters. The prediction and optimization module is used to predict and optimize performance using the calibrated simulation model.
9. An electronic device, characterized in that, The method includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the vehicle jack displacement calibration test method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement the automobile jack displacement calibration test method according to any one of claims 1 to 7.