Vehicle door protection plate testing method and device and readable storage medium

Abstract

The invention provides a vehicle door protection plate testing method and device and a readable storage medium, and relates to the technical field of vehicle design. According to the vehicle door protection plate test method, the test point position of the vehicle door protection plate in the data design stage is determined, the mechanical property of the test point position is associated with the use operation corresponding to the vehicle door protection plate, the preset load corresponding to the test point position is applied to the test point position, and the vehicle door protection plate is tested under the condition that the preset load is applied to the test point position. And detecting the mechanical property of the test point. By adopting the test method, effective detection and evaluation can be carried out on key parts, which are easily perceived by a user and are easily deformed, of the vehicle door protection plate, the mechanical performance does not need to be verified through long-term use after trial-manufacturing, the research and development period of the vehicle door protection plate is shortened, and the design cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle design, and in particular, to a method and device for testing a door trim and a readable storage medium. Background Art

[0002] The door trim is installed inside the door sheet metal and usually integrates functional components such as an inner door opening handle, a window lift switch, an arm elbow rest, and a storage space. Therefore, the driver and other passengers in the vehicle will frequently contact this component during daily use. If, during the normal use of the vehicle, the user notices significant deformation, looseness, or damage of the door trim, it will seriously affect their perception of the overall vehicle quality and satisfaction.

[0003] The mechanical performance test of the door trim is generally evaluated through long-term use after trial production. This not only results in a long test cycle, but also once the design needs to be adjusted, the production equipment must be modified synchronously, thereby increasing the R & D and production costs. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and device for testing a door trim and a readable storage medium, so as to alleviate the technical problems in the prior art that the R & D cycle of the door trim is prolonged and the cost is increased due to the lack of effective detection and evaluation means.

[0005] In a first aspect, the method for testing a door trim provided by the present invention includes: determining the test points of the door trim in the data design stage; wherein, the mechanical properties of the test points are associated with the corresponding usage operations of the door trim; applying a preset load corresponding to the test point at the test point; and detecting the mechanical performance of the test point under the condition that the preset load is applied to the test point.

[0006] Based on the method for testing a door trim described in the first aspect, the test points include at least one of the following groups: a first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, a second group of test points corresponding to the middle trim plate located below the water cut boundary and facing the inner side of the compartment, a third group of test points corresponding to the armrest protruding towards the inner side of the compartment, and a fourth group of test points corresponding to the sundry bin located below the armrest and having an upward opening.

[0007] Based on the method for testing a door trim described in the first aspect, applying a preset load corresponding to the test point at the test point includes: selecting a force application device corresponding to the test point and applying a force corresponding to the test point to the test point; the force application device is configured with a working area corresponding to the test point.

[0008] Based on the door trim testing method described in the first aspect, selecting a force application tool corresponding to the test point and applying a force corresponding to the test point to the test point includes: If the test point includes a first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, select a pressing head with a first preset diameter and apply a force within a first preset range in the normal direction of the upper edge of the door trim at each point in the first group of test points; If the test point includes a second group of test points corresponding to the middle trim plate located below the water cut boundary and facing the inner side of the vehicle compartment, select a pressing head with a second preset diameter and apply a force within a second preset range in the normal direction of the middle trim plate at each point in the second group of test points; If the test point includes a third group of test points corresponding to the armrest protruding towards the inner side of the vehicle compartment, select a pressing head with a third preset diameter and apply a force within a third preset range in the normal direction of the upper surface of the armrest at each point in the third group of test points; If the test point includes a fourth group of test points corresponding to the storage bin located below the armrest and having an upward opening, select a fixture with a preset size and apply a force within a fourth preset range in the normal direction of the inner surface of the storage bin at each point in the fourth group of test points.

[0009] Based on the door trim testing method described in the first aspect, detecting the mechanical properties of the test point includes at least one of the following: Judging whether the deformation amount of the test part corresponding to the test point exceeds the preset deformation range of the test part under the condition of the preset load; Judging whether the stress of the test part corresponding to the test point exceeds the yield strength corresponding to the door trim.

[0010] Based on the door trim test method described in the first aspect, the test points of the door trim in the data design stage are determined to include at least one of the following: taking a preset first spatial rectangular coordinate system as a reference, determining a first set of test points along the water cut boundary extending along the upper edge of the door trim; wherein, the first set of test points includes at least three test points spaced downward from the water cut boundary by a first preset distance; taking a preset second spatial rectangular coordinate system as a reference, determining a second set of test points on the middle trim plate below the water cut boundary and facing the inner side of the vehicle compartment; wherein, the second set of test points includes at least one test point spaced upward from the upper surface of the armrest that protrudes toward the inner side of the vehicle compartment and is below the middle trim plate by a second preset distance; taking a preset third spatial rectangular coordinate system as a reference, determining a third set of test points on the armrest; wherein, the third set of test points includes at least one test point spaced toward the inner side of the vehicle compartment from the middle trim plate by a third preset distance; taking a preset fourth spatial rectangular coordinate system as a reference, determining a fourth set of test points on the storage bin located below the armrest and having an upward opening with reference to the upper boundary of the storage bin; wherein, the fourth set of test points includes at least one test point spaced downward from the upper boundary by a fourth preset distance.

[0011] Optionally, the first spatial rectangular coordinate system, the second spatial rectangular coordinate system, the third spatial rectangular coordinate system, and the fourth spatial rectangular coordinate system all adopt the spatial rectangular coordinate system established in the state where the door trim is installed on the vehicle and the door is closed; taking the forward direction of the vehicle as the positive direction of the x-axis of the spatial rectangular coordinate system, and taking the direction perpendicular to the ground where the vehicle is located and upward as the positive direction of the z-axis of the spatial rectangular coordinate system; wherein, the x-axis, y-axis, and z-axis of the spatial rectangular coordinate system are perpendicular to each other pairwise.

[0012] Optionally, at least one of the second set of test points and the third set of test points includes a test point located on a reference plane that includes the R point and is parallel to the yz plane; wherein, taking the hip point of the occupant simulated by the seat corresponding to the door trim when the seat is in the lowest and last state as the R point.

[0013] In a second aspect, the door trim test device provided by the present invention includes: a test point selection unit for determining the test points of the door trim in the data design stage; wherein, the mechanical properties of the test points are associated with the corresponding usage operations of the door trim; a loading unit for applying a preset load corresponding to the test point at the test point; a detection unit for detecting the mechanical properties of the test point under the condition that the preset load is applied to the test point.

[0014] In a third aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the door trim testing method described in the first aspect are implemented.

[0015] The embodiments of the present invention bring the following beneficial effects: By determining the test points of the door trim at the data design stage, and the mechanical properties of the test points are associated with the corresponding usage operations of the door trim, the test points can better represent the key parts on the door trim that are easily perceived by users and are prone to deformation; Applying the preset load corresponding to the test point at the test point, and detecting the mechanical properties of the test point under the condition that the preset load is applied to the test point, it is possible to effectively detect and evaluate the above key parts at the data design stage. Compared with the method of verifying the mechanical properties of the door trim through long-term use after trial production, the test method of this embodiment is beneficial to shortening the R & D cycle of the door trim and reducing the design cost. By the above method of determining the test points and the method of detecting the mechanical properties of the test points under the condition that the above preset load is applied to the test points, the accuracy of the test results of the door trim can be effectively improved, providing reliable data for reasonably planning the production and implementation process of the door trim.

[0016] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following specific preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the related art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a flowchart of the door trim testing method provided by the embodiments of the invention;

[0019] Figure 2 It is a schematic diagram of the door trim provided by the embodiments of the present invention in a three-dimensional rectangular coordinate system;

[0020] Figure 3 It is a partial enlarged schematic diagram of the water cut part and the first projection plane of the door trim provided by the embodiments of the present invention;

[0021] Figure 4 It is a partial enlarged schematic diagram of the middle trim part, the armrest part and the reference plane of the door trim provided by the embodiments of the present invention;

[0022] Figure 5Partial enlarged schematic diagram of the sundry bin of the door trim panel and the second projection plane provided by the embodiment of the present invention;

[0023] Figure 6 Structural block diagram of the door trim panel test device provided by the embodiment of the present invention;

[0024] Figure 7 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 1 Schematic diagram of the result of stiffness analysis realized by computer simulation;

[0025] Figure 8 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 2 Schematic diagram of the result of stiffness analysis realized by computer simulation;

[0026] Figure 9 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 3 Schematic diagram of the result of stiffness analysis realized by computer simulation;

[0027] Figure 10 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 4 Schematic diagram of the result of stiffness analysis realized by computer simulation Figure 1 ;

[0028] Figure 11 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 4 Schematic diagram of the result of stiffness analysis realized by computer simulation Figure 2 ;

[0029] Figure 12 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 4 Schematic diagram of the result of strength analysis realized by computer simulation;

[0030] Figure 13 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 5 Schematic diagram of the result of strength analysis realized by computer simulation;

[0031] Figure 14 For the door trim panel test method provided by the embodiment of the present invention at the corresponding Figure 2 Test point F 6Schematic diagram of the result of stiffness analysis implemented by computer simulation;

[0032] Figure 15 For the test point F corresponding to the door trim test method provided by the embodiment of the present invention Figure 2 in the 6 Schematic diagram of the result of strength analysis implemented by computer simulation.

[0033] Icon: 01 - Test point selection unit; 02 - Loading unit; 03 - Detection unit; 100 - Water cut; 200 - Middle trim; 300 - Armrest; 400 - Storage bin. Detailed implementation manners

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for the description of name differences and cannot be understood as indicating or implying relative importance.

[0036] As a relatively important component on a vehicle, the performance of the door trim is easily perceived by users during the use of the vehicle. Considering factors such as production cost, difficulty in process implementation, and R & D cycle, the performance rationality of the door trim is particularly important. Based on this, the embodiments of the present invention provide a door trim test method, device, and readable storage medium. Through reasonable testing of the door trim at the vehicle data design stage, the test results of the door trim can be obtained at the data design stage, and these test results can guide the R & D of the door trim, thereby being able to reasonably plan the production and implementation process of the door trim and shorten the R & D cycle of the door trim.

[0037] See Figure 1 The flowchart of a door trim test method shown in the figure. This method can be applied to a vehicle test device (or vehicle test system) and specifically includes the following steps:

[0038] Step S101: Determine the test points of the door trim during the data design phase; among them, the mechanical properties of the test points are related to the corresponding usage operations of the door trim.

[0039] The above data design phase refers to the vehicle design phase of the door trim. During this phase, the vehicle has not been mass-produced and can be regarded as the R & D phase of the vehicle.

[0040] In this embodiment, the corresponding usage operations of the door trim may include the opening and closing operations of the door (such as the pushing and pulling operations on the inner handle of the door), the lifting operations of the window (such as the pressing or lifting operations on the window lift switch), and may also include the leaning operation of the elbow on the door trim, as well as the operation of taking and placing sundries in the storage bin or sundries bin on the door trim, etc.

[0041] The above test points can be the points corresponding to multiple different parts on the door trim, or one or more points corresponding to the same part on the door trim. The specific determination method of the test points can be selected according to the actual test scenario, and this embodiment does not limit this.

[0042] Step S102: Apply the preset load corresponding to the test point at the test point.

[0043] As a possible implementation manner, when there are multiple test points, the preset loads corresponding to different test points may be different. Or, for multiple test points corresponding to the same part on the door trim, the preset loads corresponding to each test point among the multiple test points may be the same or different. The magnitude of the preset load can be set according to the material of the part corresponding to the test point on the door trim and / or the magnitude of the operating force corresponding to this part.

[0044] Step S103: Detect the mechanical properties of the test point under the condition that the preset load is applied to the test point.

[0045] In this embodiment, detecting the mechanical properties of the test point may include detecting its mechanical properties when the preset load is being applied to the test point, and may also include detecting the mechanical properties of the detector after the preset load is applied to the test point. The specific detection timing can be determined according to the specific mechanical properties to be detected.

[0046] The specific performance parameters involved in the above mechanical properties can be determined according to the material of the part corresponding to the test point on the door trim. For example, the above mechanical properties may include performance parameters such as the stiffness and strength of the test point.

[0047] The above method determines the test points of the door trim during the data design stage, and the mechanical properties of the test points are related to the corresponding usage operations of the door trim, making the test points better represent the key parts on the door trim that are easily perceived by users and prone to deformation; applying the preset load corresponding to the test point at the test point, and detecting the mechanical properties of the test point under the condition that the preset load is applied to the test point, it is possible to effectively detect and evaluate the above key parts during the data design stage. Compared with the method of verifying the mechanical properties of the door trim through long-term use after trial production, the test method of this embodiment is beneficial to shortening the R & D cycle of the door trim and reducing the design cost. By the above method of determining the test points and the method of detecting the mechanical properties of the test points under the condition that the above preset load is applied to the test points, the accuracy of the test results of the door trim can be effectively improved, providing reliable data for reasonably planning the manufacturing cost and realizing the process of the door trim.

[0048] In this embodiment, the corresponding usage operations of the door trim include the operations of the inner door opening handle and the window lift switch, as well as the elbow rest of the arm and the taking and placing of sundries. Selecting the test points whose mechanical properties are related to the usage operations and detecting the mechanical properties such as stiffness and strength of the test points can verify the mechanical properties of the key parts related to the usage operations, easily perceived by users and prone to deformation during the data design stage, without the need for long-term use testing after trial production, which is beneficial to shortening the R & D cycle of the door trim and reducing the design cost.

[0049] In an alternative embodiment, the test points can be selected from the points that are easily touched during the corresponding usage operations of the door trim, and simulation tests can be carried out in the relevant areas, and the points frequently touched by the test drive or test ride personnel can be used as the test points. In addition, the test points can also be selected from the points that are prone to stress concentration during the corresponding usage operations of the door trim. The preset load corresponding to each test point is related to the force of the daily usage operation of the test point, and the preset load can be slightly greater than the force experienced by the corresponding test point during the daily usage operation, so as to verify the mechanical properties of the corresponding part of the test point under the condition of a larger operation force.

[0050] As Figure 2 shown, in the embodiment of the present invention, the test points include at least one of the following groups: the first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, the second group of test points corresponding to the middle trim plate 200 located below the water cut boundary and facing the inner side of the compartment, the third group of test points corresponding to the armrest 300 protruding towards the inner side of the compartment, and the fourth group of test points corresponding to the sundry bin 400 located below the armrest 300 and having an upward opening.

[0051] Among them, the first group of test points are selected along the water cut boundary, and there is a corresponding relationship between the first group of test points and the water cut boundary. The water cut boundary can be understood as the upper edge line of the water cut 100 of the door trim. When the door trim is installed on the vehicle and the door is in the closed state, the water cut boundary extends forward from the rear of the vehicle. The first group of test points can select several points on the upper edge line of the water cut 100, or can select several points at a preset interval downward relative to the upper edge line of the water cut 100. The mechanical properties of the first group of test points are related to the water cut boundary in actions such as glass lifting and human leaning. Conducting mechanical performance tests on the first group of test points can obtain the mechanical characteristics shown by the water cut 100 in daily use. The position of the second group of test points is lower than that of the first group of test points and higher than the armrest 300. The second group of test points can be regarded as the points that are easily touched by the arm or elbow when the arm is placed on the armrest 300 or the occupant leans on the door trim. The third group of test points can select the points that are easily touched when the armrest 300 is in use, or can select the points that are easily squeezed by the arm when operating devices such as the window lift switch on the armrest 300. The second group of test points and the third group of test points can be interrelated in terms of position selection. Conducting mechanical performance tests on the second group of test points and the third group of test points respectively can verify the mechanical characteristics shown by the middle trim 200 and the squeezed parts of the armrest 300 when the driver and passengers use the armrest 300. The fourth group of test points can be selected along the edge of the opening of the sundry bin 400, or can select several points at a preset interval downward along the edge of the opening of the sundry bin 400. The fourth group of test points can be regarded as the easily deformed edge part at the opening of the sundry bin 400 or the part that is easily touched when taking and placing sundries. Conducting mechanical performance tests on the fourth group of test points can reflect the mechanical characteristics shown by the sundry bin 400 in daily use.

[0052] Applying the preset load corresponding to the test point at the test point includes: selecting a force application device corresponding to the test point and applying the force corresponding to the test point to the test point; the force application device is configured with an action area corresponding to the test point.

[0053] According to the shape and structure of the part where the corresponding test point is located and the type of force in daily use, corresponding force - applying devices are selected for each test point. The force - applying devices may include a pressure head driven by devices such as hydraulic or pneumatic devices, or the force - applying device may be a fixture whose opening degree changes driven by a clamping driving device; in an alternative embodiment, the force - applying device may include a hammer head with an impact effect, or the force - applying device includes devices such as a suction cup that can adsorb the area corresponding to the test point and bear a certain pulling force. The force - applying device corresponding to each test point is configured with a corresponding acting area, and this acting area approaches the contact area of the driver or occupant's daily use operation with respect to the area where the test point is located, and can be close to the force - applying situation during daily use. The acting surface of the force - applying device corresponding to the test point can be configured as a circular or rectangular plane, and can also be configured to form a curved surface adapted to the part where the test point is located.

[0054] Furthermore, when selecting a force - applying device corresponding to the test point and applying the force corresponding to the test point to the test point, it includes: if the test point includes the first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, a pressure head with a first preset diameter is selected, and a force within a first preset range is applied along the normal direction of the upper edge of the door trim at each point in the first group of test points; if the test point includes the second group of test points corresponding to the middle trim panel 200 located below the water cut boundary and facing the inner side of the vehicle compartment, a pressure head with a second preset diameter is selected, and a force within a second preset range is applied along the normal direction of the middle trim panel 200 at each point in the second group of test points; if the test point includes the third group of test points corresponding to the armrest 300 protruding towards the inner side of the vehicle compartment, a pressure head with a third preset diameter is selected, and a force within a third preset range is applied along the normal direction of the upper surface of the armrest 300 at each point in the third group of test points; if the test point includes the fourth group of test points corresponding to the storage bin 400 located below the armrest 300 and having an upward opening, a fixture with a preset size is selected, and a force within a fourth preset range is applied along the normal direction of the inner surface of the storage bin 400 at each point in the fourth group of test points.

[0055] Among them, for the first group of test points, a pressure head with a first preset diameter of 50 mm can be used, or the diameter of the pressure head can be reduced, and a pressure head with a first preset diameter of 45 mm, 40 mm, 30 mm or 25 mm can be selected, so as to increase the pressure of the first group of test points under a certain pressure; similarly, the diameter of the pressure head can be increased, and a pressure head with a first preset diameter of 55 mm, 60 mm or 65 mm can be selected, so as to reduce the pressure of the first group of test points under a certain pressure. Under the condition of using a pressure head with a first preset diameter of 50 mm, the first preset range of force is 50 N ± 2 N. If the deformation amount of the test part corresponding to the first group of test points is less than or equal to 3 mm, it can be considered that the stiffness of the test part meets the design requirements.

[0056] For the second set of test points, an indenter with a second preset diameter of 30 mm can be used. The indenter diameter can also be increased, and indenters with second preset diameters of 45 mm, 40 mm, 35 mm, or 32 mm can be selected, etc., so as to reduce the pressure on the second set of test points under a certain pressure. Similarly, the indenter diameter can be reduced, and indenters with second preset diameters of 20 mm, 25 mm, or 28 mm can be selected, etc., so as to increase the pressure on the second set of test points under a certain pressure. When using an indenter with a second preset diameter of 30 mm, when the force in the second preset range is 50 N ± 2 N, the deformation of the test part corresponding to the second set of test points is less than or equal to 2.5 mm. And when the force in the second preset range is 100 N ± 5 N, the deformation of the test part corresponding to the second set of test points is less than or equal to 5 mm, then it can be considered that the stiffness of the test part meets the design requirements. Similarly, when using an indenter with a second preset diameter of 30 mm, when the force in the second preset range is 100 N ± 5 N, if the stress of the test part corresponding to the second set of test points is less than the yield strength of the material of this part, then it can be considered that this part meets the strength design requirements.

[0057] For the third set of test points, an indenter with a third preset diameter of 40 mm can be used. The indenter diameter can also be increased, and indenters with third preset diameters of 60 mm, 55 mm, 50 mm, or 45 mm can be selected, etc., so as to reduce the pressure on the third set of test points under a certain pressure. Similarly, the indenter diameter can be reduced, and indenters with third preset diameters of 35 mm, 30 mm, or 25 mm can be selected, etc., so as to increase the pressure on the third set of test points under a certain pressure. When using an indenter with a third preset diameter of 40 mm, when the force in the third preset range is 800 N ± 10 N, if the stress of the test part corresponding to the third set of test points is less than the yield strength of the material of this part, then it can be considered that this part meets the strength design requirements.

[0058] For the fourth set of test points, a fixture with an acting area of 50 mm × 50 mm can be used. The acting area of the fixture can also be increased or decreased, or an indenter can be selected as the force-applying device corresponding to the fourth set of test points. When using a fixture with an acting area of 50 mm × 50 mm, the force in the fourth preset range is configured as 200 N ± 5 N. If the deformation of the test part corresponding to the fourth set of test points is less than or equal to 20 mm, then it can be considered that the stiffness of this part meets the design requirements; if the stress of the test part corresponding to the fourth set of test points is less than the yield strength of the material of this part, then it can be considered that this part meets the strength design requirements.

[0059] It should be noted that selecting corresponding force - applying tools for each test point can not only approximate the external force state during daily use, but also select tools with low cost, easy processing, and easy driving according to the shape and structure of the part where each test point is located. When applying the ultimate load, the mechanical characteristics shown by the corresponding part are tested. Under the condition of meeting the corresponding standards, the good mechanical performance of the door trim in daily use can be ensured.

[0060] In an alternative embodiment, the detection of the mechanical properties of the test points includes at least one of the following: judging whether the deformation amount of the test part corresponding to the test point exceeds the preset deformation range of the test part under the condition of the preset load; judging whether the stress of the test part corresponding to the test point exceeds the yield strength of the door trim. Under the preset load condition, it is judged whether it meets the stiffness design requirements according to whether the deformation amount of the test part exceeds the preset deformation amount range of the part, and it is judged whether it meets the strength design requirements according to whether the stress of the test part reaches the yield strength of the material of the part. For each point on the first group of test points, the second group of test points, the third group of test points, and the fourth group of test points, stiffness and strength detection can be carried out respectively. In an alternative embodiment, stiffness detection is carried out for each point in the first group of test points, stiffness and strength detection are carried out for each point in the second group of test points and the fourth group of test points respectively, and strength detection is carried out for each point in the third group of test points, so as to realize the test of the key mechanical properties related to each part during daily use operation.

[0061] In an alternative embodiment, determining the test points of the door trim in the data design stage includes at least one of the following: taking the preset first spatial rectangular coordinate system as a reference, determining the first group of test points along the water cut boundary extending along the upper edge of the door trim; among them, referring to Figure 2 and Figure 3 , the first group of test points includes at least three test points F 1 , F 2 , F 3 spaced downward by a first preset distance relative to the water cut boundary; taking the preset second spatial rectangular coordinate system as a reference, determining the second group of test points on the middle trim panel 200 below the water cut boundary and facing the inner side of the carriage; among them, referring to Figure 2 and Figure 4 , the second group of test points includes at least one test point F 4 spaced upward by a second preset distance relative to the upper surface of the armrest 300 that protrudes inward from the carriage and is below the middle trim panel 200; taking the preset third spatial rectangular coordinate system as a reference, determining the third group of test points on the armrest 300; among them, referring to Figure 2 and Figure 4, the third set of test points includes: at least one test point F spaced from the middle trim panel 200 by a third preset distance towards the inner side of the vehicle compartment 5 ; based on a preset fourth spatial rectangular coordinate system, on the storage bin 400 located below the armrest 300 and having an upward opening, determine the fourth set of test points with reference to the upper boundary of the storage bin 400; wherein, referring to Figure 2 and Figure 5 , the fourth set of test points includes at least one test point F spaced from the upper boundary by a fourth preset distance downwards 6 .

[0062] It should be noted that the three test points F 1 、F 2 、F 3 in the first set of test points can be selected as three points that divide the water cut boundary into four equal parts, or one test point F 2 can be selected at the center of the water cut boundary. Referring to the test point F 2 , test points F 1 、F 3 are respectively taken at intervals on both sides. In addition, the number of test points in the first set of test points can also be increased, and the distance between adjacent two test points can also be randomly configured. Similar to the first set of test points, the number of test points selected for the second set of test points, the third set of test points, and the fourth set of test points can all be increased, and the positions of the test points can also be randomly selected in the corresponding areas.

[0063] In an alternative embodiment, the first spatial rectangular coordinate system, the second spatial rectangular coordinate system, the third spatial rectangular coordinate system, and the fourth spatial rectangular coordinate system can be respectively established corresponding to the water cut 100, the middle trim panel 200, the armrest 300, and the storage bin 400 one by one, and each rectangular coordinate system can adaptively select the orientation according to the structural shape of the test part of the door trim.

[0064] In a preferred embodiment, the first, second, third, and fourth spatial rectangular coordinate systems are all configured as spatial rectangular coordinate systems established when the door trim is installed on the vehicle and the door is closed; the forward direction of the vehicle is taken as the positive direction of the x-axis of the spatial rectangular coordinate system, and the direction perpendicular to the ground where the vehicle is located and upward is taken as the positive direction of the z-axis of the spatial rectangular coordinate system; wherein, the x-axis, y-axis, and z-axis of the spatial rectangular coordinate system are perpendicular to each other pairwise. A coordinate system is established corresponding to the installation and use state of the door trim, and the first group of test points, the second group of test points, the third group of test points, and the fourth group of test points selected are closer to the points that are easily touched in daily use operations. Moreover, each group of test points is determined with reference to the same spatial rectangular coordinate system. Whether establishing the coordinate system and selecting test points on the finite element model or selecting test points through calibration on the physical object of the door trim, the rapid determination of each group of test points can be achieved, which is beneficial to improving the test efficiency.

[0065] Optionally, in the step of determining the first group of test points, the second group of test points, the third group of test points, and the fourth group of test points, at least one reference part of the window trim 100, the middle trim 200, the armrest 300, and the storage bin 400 is extracted with reference to the spatial rectangular coordinate system; and at least one load application point of the window trim 100, the middle trim 200, the armrest 300, and the storage bin 400 is determined based on the surface of the door trim that can be touched on the inner side of the vehicle compartment according to the reference part.

[0066] As Figure 2 and Figure 3 shown, the steps of extracting the reference part of the window trim 100 with reference to the spatial rectangular coordinate system include: determining the upper contour line L 1 of the projection of the door trim on the first projection plane S 1 parallel to the xz plane, and the upper contour line L 1 corresponds to the window boundary extended from the upper edge of the window trim 100; translating the upper contour line L 1 of the projection of the door trim downward along the z-axis by a first preset distance to obtain the window trim test reference line L 2 , the first preset distance can be set to 20 mm, and the first preset distance can also be increased or decreased to change the position of the first group of test points. On the one hand, it avoids the edge line of the window trim 100, and on the other hand, it ensures that the first group of test points is close to the easily deformed window boundary; several window trim test reference points can be randomly selected on the window trim test reference line L 2 , or several window trim test reference points F 2 `, F 1 `, F 2 ` that equally divide the window trim test reference line L 3 ` can be selected.

[0067] The step of determining the load application point of the water shear part according to the reference position on the surface of the door guard plate that can touch the inner side of the vehicle compartment comprises: projecting the water shear test reference point along the y-axis toward the inner side of the vehicle compartment to the inner surface of the door guard plate to obtain the corresponding load application point F 1 、F 2 、F 3 .

[0068] Optionally, at least one of the second group of test points and the third group of test points includes test points located on a reference plane including point R and parallel to the yz plane; wherein the seat corresponding to the door guard plate simulated by the passenger is used as point R to simulate the hip point of the passenger in the lowest and rearmost state. The second group of test points and the third group of test points are determined with reference to the position of the driver or passenger, so that the second group of test points and the third group of test points are closer to the position of the elbow in actual use.

[0069] like Figure 2 and Figure 4 As shown, in an optional embodiment, the step of extracting the reference position of the median trim plate 200 and the armrest 300 with reference to the spatial rectangular coordinate system includes: determining a reference surface S passing through point R and parallel to the yz plane 2 , where the seat corresponding to the door guard plate simulated by the passenger is taken as point R, and the hip point of the simulated passenger in the lowest and most rearward state of the seat is taken as point R; the reference surface S 2 Intersecting with the inner surface of the middle trim plate 200 to obtain the first trim plate reference line L 4 ; With reference surface S 2 Intersecting with the upper surface of the handrail 300 to obtain the first handrail reference line L 3 ; Take the first handrail reference line L 3 The second handrail reference line L is obtained by translating upward along the z-axis by a preset second preset distance 5 ; Take the first trim reference line L 4 The second trim reference line L is obtained by translating the third preset distance along the y-axis to the inner side of the vehicle compartment 6 . Among them, the second preset spacing and the third preset spacing correspond to the elbow size of the driver or passenger, which can be configured as 40mm, or the second preset spacing and the third preset spacing can be changed and adjusted respectively, and selected from sizes such as 30mm, 35mm, 45mm and 50mm. When the driver or passenger's elbow is placed on the upper surface of the armrest 300, the distance between the position where the outer side of the elbow abuts against the center trim 200 and the upper surface of the armrest 300 corresponds to the second preset spacing, and the distance between the position where the elbow presses down on the upper surface of the armrest 300 and the inner surface of the center trim 200 corresponds to the third preset spacing, so as to ensure that the second group of test points selected on the center trim 200 and the third group of test points selected on the armrest 300 are close to the position where the driver's or passenger's elbow abuts against the door guard plate when actually in use.

[0070] The steps of determining the load application points of the middle trim panel 200 and the armrest 300 based on the reference part on the surface of the door trim panel accessible inside the vehicle compartment include: using the first trim panel reference line L 4 and the second armrest reference line L 5 intersection point as the load application point F 4 of the middle trim panel 200; using the first armrest reference line L 3 and the second trim panel reference line L 6 intersection point as the load application point F 5 of the armrest 300.

[0071] As Figure 2 and Figure 5 shown, in an alternative embodiment, the steps of extracting the reference part of the sundry bin 400 with reference to a spatial rectangular coordinate system include: determining the upper boundary line L 3 of the projection of the sundry bin 400 on the second projection plane S 7 parallel to the xz plane; translating the upper boundary line L 7 of the projection of the sundry bin 400 downward along the z-axis by a fourth preset distance to obtain the upper boundary test reference line L 8 ; determining the upper boundary test reference point F 8 ` in the middle of the upper boundary test reference line L 6 . Among them, the fourth preset distance can be configured as 10 mm, or the fourth preset distance can be appropriately increased or decreased. The upper boundary line L 7 of the projection of the sundry bin 400 is translated downward along the z-axis by the fourth preset distance, and the obtained upper boundary test reference line L 8 avoids the weak edge part, but is still within the area where the opening of the sundry bin 400 is prone to deformation, which is more representative for the stiffness and strength detection.

[0072] The steps of determining the load application point of the sundry bin 400 based on the reference part on the surface of the door trim panel accessible inside the vehicle compartment include: projecting the upper boundary test reference point F 6 ` along the y-axis to the inner surface of the door trim panel inside the vehicle compartment to obtain the corresponding load application point F 6 .

[0073] Among them, the upper boundary test reference point F 6 ` can be selected as the center point of the upper boundary test reference line L 8 , or can be randomly selected as multiple points evenly distributed on the upper boundary test reference line L 8 . Corresponding to the upper boundary test reference point F 6 ` projected to the inner surface of the door trim panel to obtain the corresponding load application point F 6 , the load application point F 6 serves as the actual acting point of the external force.

[0074] In an alternative embodiment, the door trim test method adopts the following test steps and corresponding mechanical property judgment criteria are given accordingly.

[0075] (1) Apply a load of 50 N ± 2 N along the normal direction of the upper surface of the door trim at three test points F 1 , F 2 , F 3 . The diameter of the indenter is 50 mm. The standard for judging the stiffness of the water cut 100 to be qualified requires that the deformation amount of the first group of test points ≤ 3 mm; see Figure 2 and Figure 7 , when a load of 50 N is applied along the normal direction of the upper surface of the door trim to the test point F 1 by an indenter with a diameter of 50 mm, deformation occurs, and the deformation amount corresponding to the area with the largest deformation amount (the area with the largest gray scale in the figure) is 0.367 mm; see Figure 2 and Figure 8 , when a load of 50 N is applied along the normal direction of the upper surface of the door trim to the test point F 2 by an indenter with a diameter of 50 mm, deformation occurs, and the deformation amount corresponding to the area with the largest deformation amount (the area with the largest gray scale in the figure) is 0.446 mm; see Figure 2 and Figure 9 , when a load of 50 N is applied along the normal direction of the upper surface of the door trim to the test point F 3 by an indenter with a diameter of 50 mm, deformation occurs, and the deformation amount corresponding to the area with the largest deformation amount (the area with the largest gray scale in the figure) is 0.316 mm; by comparison, the maximum deformation amounts generated in the corresponding areas of the three test points F 1 , F 2 , F 3 are all less than 3 mm. Thus, it can be judged that the stiffness of the water cut 100 meets the technical requirements.

[0076] (2) Apply a load of 50 N ± 2 N along the normal direction of the middle trim 200 at the second group of test point F 4 . The diameter of the indenter is 30 mm. It is required that the deformation amount of the second group of test points ≤ 2.5 mm; and, apply a load of 100 N ± 5 N along the normal direction of the middle trim 200 at the second group of test point F4. The diameter of the indenter is 30 mm. It is required that the deformation amount of the second group of test points ≤ 5 mm. If the second group of test points meet the above two deformation amount tests, it can be judged that the stiffness of the middle trim 200 is qualified; see Figure 2 and Figure 10 , the second group of test point F 4When a load of 50 N is applied in the normal direction of the middle trim panel 200 by an indenter with a diameter of 30 mm, deformation occurs, and the deformation amount corresponding to the area with the largest deformation (the area with the darkest gray in the figure) is 0.829 mm, and the maximum deformation amount is less than 2.5 mm; see Figure 2 and Figure 11 , the second group of test points F 4 When a load of 100 N is applied in the normal direction of the middle trim panel 200 by an indenter with a diameter of 30 mm, deformation occurs, and the deformation amount corresponding to the area with the largest deformation (the area with the darkest gray in the figure) is 1.639 mm, and the maximum deformation amount is less than 5 mm; for the second group of test points F in the two tests 4 The maximum deformation amounts generated in the corresponding areas all meet the requirements, and thus it can be judged that the stiffness of the middle trim panel 200 meets the technical requirements.

[0077] (3) At the second group of test points F 4 Apply a load of 100 N ± 5 N in the normal direction of the middle trim panel 200. The diameter of the indenter is 30 mm. The standard requirement for judging that the strength of the middle trim panel 200 is qualified is that the maximum stress < the material yield strength; see Figure 2 and Figure 12 , the second group of test points F 4 When a load of 100 N is applied in the normal direction of the middle trim panel 200 by an indenter with a diameter of 30 mm, the stress value corresponding to the area with the largest stress (the area with the darkest gray in the figure) of the middle trim panel 200 is 8.938 MPa, and the maximum stress is less than the yield strength 48 MPa of the material used for the middle trim panel 200. Thus, it can be judged that the strength of the middle trim panel 200 meets the technical requirements.

[0078] (4) At the third group of test points F 5 Apply a load of 800 N ± 10 N downward along the z-axis to the armrest 300. The diameter of the indenter is 40 mm. The standard requirement for judging that the strength of the armrest 300 is qualified is that the maximum stress < the material yield strength; see Figure 2 and Figure 13 , the third group of test points F 5 When a load of 800 N is applied downward along the z-axis by an indenter with a diameter of 40 mm to the armrest 300, the stress value corresponding to the area with the largest stress (the area with the darkest gray in the figure) of the armrest 300 is 43.165 MPa, and the maximum stress is less than the yield strength 48 MPa of the material used for the armrest 300. Thus, it can be judged that the strength of the armrest 300 meets the technical requirements.

[0079] (5) At the fourth group of test points F 6 Use a fixture with a force application area of 50 mm × 50 mm to apply a load of 200 N ± 5 N along the y-axis. The standard requirement for judging that the stiffness of the sundry bin 400 is qualified is that the deformation amount ≤ 20 mm; see Figure 2 and Figure 14, the fourth group of test points F 6 When a fixture with a force-applied area of 50 mm × 50 mm applies a load of 200 N along the y-axis, deformation occurs, and the deformation amount corresponding to the area with the largest deformation (the area with the largest gray level in the figure) is 19.398 mm. The maximum deformation amount is less than 20 mm. Thus, it can be determined that the stiffness of the sundry bucket 400 meets the technical requirements.

[0080] (6) At the fourth group of test points F 6 , a fixture with a force-applied area of 50 mm × 50 mm is used to apply a load of 200 N ± 5 N along the y-axis. The standard requirement for determining that the strength of the sundry bucket 400 is qualified is that the maximum stress < the material yield strength. See Figure 2 and Figure 15 , the fourth group of test points F 6 When a fixture with a force-applied area of 50 mm × 50 mm applies a load of 200 N along the y-axis to the sundry bucket 400, the stress value corresponding to the area with the maximum stress (the area with the largest gray level in the figure) of the sundry bucket 400 is 21.826 MPa. The maximum stress is less than the yield strength of 22.7 MPa of the material used for the sundry bucket 400. Thus, it can be determined that the strength of the sundry bucket 400 meets the technical requirements.

[0081] It should be noted that for the test method of the door trim panel recorded in this embodiment, the selection of test points, the application of preset loads, and the testing of mechanical properties can be realized manually. It can also use corresponding instruments to select test points, load the load, detect stress, and detect deformation of the door trim panel through manual or automatic control. A corresponding computer software program can also be formed for the test method of the door trim panel. This computer software can integrate functions such as model acquisition and finite element analysis. The finite element model of the door trim panel can be obtained through drawing or three-dimensional scanning. The test points are selected corresponding to the relevant steps in the test method of the door trim panel. The preset load is simulated and applied to the corresponding test points on the finite element model, and the finite element method is used to analyze and solve the deformation amount and stress corresponding to the test points when the preset load is applied.

[0082] Corresponding to the above method, the embodiment of the present invention also provides a test device for the door trim panel. See Figure 6 , this device includes the following units: a test point selection unit 01, a loading unit 02, and a detection unit 03; the test point selection unit 01 is used to determine the test points of the door trim panel in the data design stage; among them, the mechanical properties of the test points are associated with the corresponding usage operations of the door trim panel; the loading unit 02 is used to apply the preset load corresponding to the test point at the test point; the detection unit 03 is used to detect the mechanical properties of the test point under the condition that the preset load is applied to the test point.

[0083] The above-mentioned device determines the test points of the door trim during the data design stage, and the mechanical properties of these test points are associated with the corresponding usage operations of the door trim, making the test points better represent the key parts on the door trim that are easily perceived by users and prone to deformation. By applying the preset load corresponding to the test point at the test point and detecting the mechanical properties of the test point under the condition that the preset load is applied to the test point, effective detection and evaluation of the above-mentioned key parts can be achieved during the data design stage. Compared with the method of verifying the mechanical properties of the door trim through long-term use after trial production, the test method of this embodiment helps to shorten the R & D cycle of the door trim and reduce the design cost. By the above-mentioned method of determining the test points and the method of detecting the mechanical properties of the test points under the condition that the preset load is applied to the test points, the accuracy of the test results of the door trim can be effectively improved, providing reliable data for reasonably planning the manufacturing cost and realizing the process of the door trim.

[0084] As a possible implementation manner, the above-mentioned test points include at least one of the following groups: the first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, the second group of test points corresponding to the middle trim plate located below the water cut boundary and facing the inner side of the carriage, the third group of test points corresponding to the armrest protruding towards the inner side of the carriage, and the fourth group of test points corresponding to the sundry bin located below the armrest and having an upward opening.

[0085] As a possible implementation manner, the above-mentioned loading unit 02 is further configured to: select a force-applying implement corresponding to the test point and apply the force corresponding to the test point to the test point; the force-applying implement is configured with an action area corresponding to the test point.

[0086] As a possible implementation manner, the above-mentioned loading unit 02 is further configured to: if the test points include the first group of test points corresponding to the water cut boundary extending along the upper edge of the door trim, select a punch with a first preset diameter and apply a first preset range of force in the normal direction of the upper edge of the door trim at each point in the first group of test points; if the test points include the second group of test points corresponding to the middle trim plate located below the water cut boundary and facing the inner side of the carriage, select a punch with a second preset diameter and apply a second preset range of force in the normal direction of the middle trim plate at each point in the second group of test points; if the test points include the third group of test points corresponding to the armrest protruding towards the inner side of the carriage, select a punch with a third preset diameter and apply a third preset range of force in the normal direction of the upper surface of the armrest at each point in the third group of test points; if the test points include the fourth group of test points corresponding to the sundry bin located below the armrest and having an upward opening, select a fixture with a preset size and apply a fourth preset range of force in the normal direction of the inner surface of the sundry bin at each point in the fourth group of test points.

[0087] As a possible implementation manner, the above detection unit 03 is further configured to detect the mechanical properties of the test point by using at least one of the following: determining whether the deformation amount of the test part corresponding to the test point exceeds the preset deformation range of the test part under the condition of the preset load; determining whether the stress of the test part corresponding to the test point exceeds the yield strength of the door trim panel.

[0088] As a possible implementation manner, the above test point selection unit 01 determines the test points of the door trim panel in the data design stage by using at least one of the following: determining a first group of test points along the water cut boundary extending along the upper edge of the door trim panel based on a preset first spatial rectangular coordinate system; wherein, the first group of test points includes at least three test points spaced downward from the water cut boundary by a first preset distance; determining a second group of test points on the middle trim panel below the water cut boundary and facing the inner side of the vehicle compartment based on a preset second spatial rectangular coordinate system; wherein, the second group of test points includes at least one test point spaced upward from the upper surface of the armrest that protrudes inward from the vehicle compartment below the middle trim panel by a second preset distance; determining a third group of test points on the armrest based on a preset third spatial rectangular coordinate system; wherein, the third group of test points includes: at least one test point spaced inward from the middle trim panel by a third preset distance; determining a fourth group of test points on the storage bin with an upward opening and located below the armrest by referring to the upper boundary of the storage bin based on a preset fourth spatial rectangular coordinate system; wherein, the fourth group of test points includes at least one test point spaced downward from the upper boundary by a fourth preset distance.

[0089] As a possible implementation manner, the first spatial rectangular coordinate system, the second spatial rectangular coordinate system, the third spatial rectangular coordinate system, and the fourth spatial rectangular coordinate system are all spatial rectangular coordinate systems established in the state where the door trim panel is installed on the vehicle and the door is closed; taking the forward direction of the vehicle as the positive direction of the x-axis of the spatial rectangular coordinate system, and taking the direction perpendicular to the ground where the vehicle is located and upward as the positive direction of the z-axis of the spatial rectangular coordinate system; wherein, the x-axis, y-axis, and z-axis of the spatial rectangular coordinate system are perpendicular to each other in pairs.

[0090] As a possible implementation manner, at least one of the second group of test points and the third group of test points includes a test point located on a reference plane that includes the R point and is parallel to the yz plane; wherein, the hip point of the occupant is simulated with the seat corresponding to the door trim panel when the seat is in the lowest and last state as the R point.

[0091] The computer-readable storage medium provided by the embodiment of the present invention stores a computer program thereon, and when the computer program is executed by a processor, it implements the door trim panel test method described in the above implementation manner.

[0092] Any combination of one or more computer-readable media may be employed. The computer-readable media may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may include read-only memory (ROM), magnetic disks, floppy disks, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. The computer-readable storage medium may also include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be of various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0093] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A door panel testing method, characterized in that: The method comprises: Determining test points of the door guard plate in the data design stage; wherein the mechanical properties of the test points are associated with the corresponding use operations of the door guard plate; Applying a preset load corresponding to the test point at the test point; Under the condition that the preset load is applied to the test point, the mechanical property of the test point is detected.

2. The vehicle door panel testing method according to claim 1, characterized in that: The test points include at least one of the following groups: a first group of test points corresponding to a water-cut boundary extending along the upper edge of the door guard plate, a second group of test points corresponding to a center trim panel located below the water-cut boundary and facing the inner side of the vehicle compartment, a third group of test points corresponding to an armrest protruding toward the inner side of the vehicle compartment, and a fourth group of test points corresponding to a glove box located below the armrest and having an upward opening.

3. The vehicle door panel testing method according to claim 1, characterized in that: Applying a preset load corresponding to the test point at the test point includes: A force applying device corresponding to the test point is selected to apply a force corresponding to the test point to the test point; the force applying device is configured with an action area corresponding to the test point.

4. The vehicle door panel testing method according to claim 3, characterized in that: Selecting a force applying device corresponding to the test point to apply a force corresponding to the test point to the test point includes: If the test points include a first group of test points corresponding to the water shear boundary extending along the upper edge of the door guard plate, a pressure head with a first preset diameter is selected to apply a force within a first preset range along the normal direction of the upper edge of the door guard plate at each point in the first group of test points; If the test points include a second group of test points corresponding to a center trim panel located below the water shear boundary and facing the inner side of the vehicle compartment, a pressure head with a second preset diameter is selected to apply a force within a second preset range along the normal direction of the center trim panel at each point in the second group of test points; If the test points include a third group of test points corresponding to the handrail protruding toward the inner side of the carriage, a pressure head with a third preset diameter is selected to apply a force within a third preset range along the normal direction on the upper surface of the handrail at each point in the third group of test points; If the test points include a fourth group of test points corresponding to a debris bucket located below the handrail and having an upward opening, a fixture of a preset size is selected to apply a force within a fourth preset range along the normal to the inner surface of the debris bucket at each point in the fourth group of test points.

5. The vehicle door panel testing method according to claim 1, characterized in that: Detecting the mechanical properties of the test point includes at least one of the following: Determine whether the deformation of the test part corresponding to the test point exceeds the preset deformation range corresponding to the test part under the preset load condition; Determine whether the stress of the test portion corresponding to the test point exceeds the yield strength corresponding to the door guard plate.

6. The vehicle door panel testing method according to claim 1, characterized in that: Determine the test points of the door guard plate during the data design phase, including at least one of the following: A first group of test points is determined based on a preset first spatial rectangular coordinate system and along a water-cut boundary extending from an upper edge of the door guard plate; wherein the first group of test points includes at least three test points spaced downward by a first preset interval relative to the water-cut boundary; A second group of test points is determined on the median trim below the water cut boundary and facing the inside of the vehicle compartment, based on a preset second spatial rectangular coordinate system; wherein the second group of test points includes at least one test point spaced upward by a second preset interval relative to the upper surface of the armrest below the median trim and protruding toward the inside of the vehicle compartment; A third group of test points is determined on the armrest based on a preset third spatial rectangular coordinate system; wherein the third group of test points includes: at least one test point spaced a third preset distance from the center trim panel toward the inner side of the vehicle compartment; Based on a preset fourth spatial rectangular coordinate system, a fourth group of test points is determined on a debris bucket located below the armrest and having an upward opening with reference to the upper boundary of the debris bucket; wherein the fourth group of test points includes at least one test point spaced downward by a fourth preset interval relative to the upper boundary.

7. The vehicle door panel testing method according to claim 6, characterized in that: The first space rectangular coordinate system, the second space rectangular coordinate system, the third space rectangular coordinate system and the fourth space rectangular coordinate system are all space rectangular coordinate systems established when the door guard plate is installed on the vehicle and the door is closed; The forward direction of the vehicle is taken as the positive direction of the x-axis of the spatial rectangular coordinate system, and the upward direction perpendicular to the ground on which the vehicle is located is taken as the positive direction of the z-axis of the spatial rectangular coordinate system; wherein the x-axis, y-axis and z-axis of the spatial rectangular coordinate system are perpendicular to each other.

8. The vehicle door panel testing method according to claim 7, characterized in that: At least one of the second group of test points and the third group of test points includes test points located on a reference plane including point R and parallel to the yz plane; The seat corresponding to the door guard plate is simulated to be occupied by an occupant, and the hip point of the occupant simulated by the seat in the lowest and rearmost state is taken as point R.

9. A vehicle door panel testing device, characterized in that: include: A test point selection unit, used to determine the test points of the door guard plate in the data design stage; wherein the mechanical properties of the test points are associated with the corresponding use operations of the door guard plate; A loading unit, used for applying a preset load corresponding to the test point to the test point; The detection unit is used to detect the mechanical properties of the test point under the condition that the preset load is applied to the test point.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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