Vehicle connection point positioning method and computer readable storage medium

Abstract

The invention discloses a vehicle connection point positioning method and a computer readable storage medium. The vehicle connection point positioning method comprises the following steps: a) receiving vehicle body data, target data and connection point data of a vehicle; b) projecting a target on the vehicle by using projection equipment so as to determine a relative position relationship between the projection equipment and the vehicle body; and c) projecting the connection points on the vehicle by using a projection device. According to the vehicle connection point positioning method provided by the invention, the vehicle connection point can be quickly positioned.

Description

Technical Field

[0001] The present invention relates to the field of automobiles, and in particular to a vehicle connection point positioning method and a computer-readable storage medium. Background Art

[0002] At present, the automotive industry is moving towards electrification and intelligence. New energy vehicles, especially pure electric vehicles, are rapidly increasing their market share. New energy vehicles are updated and iterated very quickly, which will put forward higher and more stringent requirements for design, development and manufacturing. Only faster and more lean optimization and iteration of new products can stand out in the fierce competition.

[0003] New energy vehicles have more design changes and shorter development cycles, so the grounding and fastening points of the vehicle's wiring harness and the fastening points of the thermal management system will constantly change their positions and quantities. In previous trials, special mechanical positioning tools were developed to locate such wiring harness grounding and fastening points. The positioning pins and positioning surfaces of the tooling were used to locate the exact position of the fastening points through the constraint ring of the stud welding gun on the tooling. Although accuracy can be ensured, the development cycle of the tooling is as long as 4-8 weeks and the cost is high, which restricts the progress of vehicle development. In addition, the tooling cannot be reused. Summary of the invention

[0004] The present invention provides a vehicle connection point positioning method, which can quickly position the vehicle connection point.

[0005] According to a vehicle connection point positioning method proposed in one aspect of the present invention, the vehicle connection point positioning method comprises the following steps:

[0006] a) receiving vehicle body data, target data and connection point data;

[0007] b) Using a projection device to project onto a target on the vehicle to determine the relative position relationship between the projection device and the vehicle body;

[0008] c) Use a projection device to project onto the connection point on the vehicle.

[0009] According to a vehicle connection point positioning method proposed in one aspect of the present invention, the vehicle body data includes the three-dimensional size of the vehicle body, the target data includes the position and number of targets, and the connection point data includes the position and number of connection points.

[0010] According to a vehicle connection point positioning method provided in one aspect of the present invention, the target is a target ball, and the target ball is fixed to the vehicle body through an adapter.

[0011] According to a vehicle connection point positioning method provided in one aspect of the present invention, after step b), a projection device is used to project onto the vehicle body to adjust the deviation.

[0012] According to a vehicle connection point positioning method proposed in one aspect of the present invention, there are at least two targets on the vehicle.

[0013] According to a vehicle connection point positioning method proposed in one aspect of the present invention, different targets are selected to reduce deviations.

[0014] According to a vehicle connection point positioning method provided in one aspect of the present invention, in step c), a projection device is used to project onto the center and / or outline of the connection point.

[0015] According to the vehicle connection point positioning method proposed in one aspect of the present invention, after step c), the projection of the projection device on the vehicle is marked.

[0016] According to the vehicle connection point positioning method provided in one aspect of the present invention, after step c), the connection point is welded using welding equipment.

[0017] A computer-readable storage medium according to one aspect of the present invention stores a computer program, which implements the steps of the method according to the present invention when executed by a processor.

[0018] The beneficial effects of the present invention include: using a projection device to project onto a connection point on a vehicle, the vehicle connection point can be quickly located, and subsequent operations on the connection point are facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. Among them:

[0020] Figure 1 The flowchart of the vehicle connection point positioning method proposed according to one embodiment of the present invention is schematically shown. DETAILED DESCRIPTION

[0021] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0022] According to one embodiment of the present invention, a vehicle connection point positioning method comprises the following steps:

[0023] a) receiving vehicle body data, target data and connection point data;

[0024] b) Using a projection device to project onto a target on the vehicle to determine the relative position relationship between the projection device and the vehicle body;

[0025] c) Use a projection device to project onto the connection point on the vehicle.

[0026] The vehicle connection points are, for example, grounding points and fastening points of the vehicle harness system and fastening points of the thermal management system. The projection device is, for example, an AR device. Through AR augmented reality technology, a virtual image can be clearly displayed on the surface of an object, and a certain degree of accuracy can be guaranteed.

[0027] In the vehicle connection point positioning method according to this embodiment, a projection device is used to project onto the connection point on the vehicle, so that the vehicle connection point can be quickly positioned and the subsequent operation of the connection point is convenient, thereby shortening the vehicle development cycle, reducing development costs, and improving vehicle development and trial production flexibility. The vehicle connection point positioning method can be used for accurate digital positioning in the research and development and trial production of new energy vehicles.

[0028] According to an embodiment of the present invention, the vehicle body data includes the three-dimensional size of the vehicle body, the target data includes the position and number of targets, and the connection point data includes the position and number of connection points.

[0029] According to an embodiment of the present invention, the target is a target ball, and the target ball is fixed to the vehicle body through an adapter.

[0030] According to an embodiment of the present invention, after step b), a projection device is used to project onto the vehicle body to adjust the deviation.

[0031] According to one embodiment of the invention, there are at least two targets on the vehicle.

[0032] According to one embodiment of the present invention, different targets are selected to reduce bias.

[0033] According to one embodiment of the present invention, in step c), a projection device is used to project onto the center and / or the outline of the connection point.

[0034] According to one embodiment of the present invention, the projection of the projection device on the vehicle is marked after step c).

[0035] According to one embodiment of the present invention, after step c), the connection points are welded using a welding device.

[0036] According to one aspect of an embodiment of the present invention, a method for locating a connection point of a new energy vehicle based on AR augmented reality technology is provided.

[0037] In the vehicle connection point positioning method: the data information of the new energy vehicle body is obtained; the coordinate information of the target wiring harness grounding point and the fastening point is obtained; the fastening point information of the thermal management system is obtained; the data information of the grounding point stud or nut is obtained (including coordinates and parameters such as quantity, model, center of circle, etc.), based on the target positioning data information, the data information is post-processed and packaged, and the main positioning reference point and the auxiliary positioning reference point (i.e., the target point) are set;

[0038] The packaged connection point data information is transmitted to the augmented reality laser projection device for encoding, translation, decoding and data processing; the target point coordinate shape is designed to be a "cross" shape, and the center contour envelope range of the coordinate point is displayed;

[0039] Pre-position the target vehicle to ensure that there is no movement in the X, Y, and Z directions and no rotation tendency in the three directions; fix the target of augmented reality laser positioning according to the set main positioning reference point to guide the laser beam to generate a projection matrix;

[0040] The target point is found and illuminated by the augmented reality laser projection device, and the target grounding or fastening point position is directly projected on the vehicle body in a "cross" shape; during the process, it is ensured that the target vehicle and the positioning system are not displaced;

[0041] There are two ways to position weld: you can use a customized marking aid to mark the outline of the projection welding gun under the guidance of augmented reality, remove the laser projection device and weld centrally; you can also use the stud projection welding gun directly, position weld under the guidance of augmented reality, and weld the target stud or nut at the target position;

[0042] Use stud welding equipment to perform wiring harness grounding and fastening point stud welding; confirm that the welding position is accurate and the connection is firm and reliable; complete the positioning welding of the pure electric vehicle grounding studs.

[0043] According to this embodiment, the positioning and welding of the grounding studs of new energy vehicles can be completed with high quality and low cost through augmented reality positioning. The target stud coordinates can be accurately projected and displayed on the target new energy vehicle body through augmented reality digital laser positioning, and positioning welding and detection can be performed according to the set rules. The development and trial production of new energy vehicles and related trial production of fuel vehicles can be carried out according to the same steps.

[0044] A vehicle connection point positioning method according to an embodiment of the present invention is combined with Figure 1 The vehicle connection point positioning method comprises the following steps:

[0045] Determine the stud requirements for wiring harness grounding and fastening points during vehicle trial production, and clarify the location and quantity of positioning points; determine the corresponding stud models, conduct virtual layout analysis of the involved areas, ensure the trial production and positioning scope, and clarify the positioning plan and operation method;

[0046] Using the digital 3D software UG NX, import the digital model of the target vehicle and parts to determine the location of the grounding point or the fastening point stud to be located; use the WAVE geometric linker in UG NX to extract the part features, and extract the center coordinates of the positioning point, mark it as a "cross", and display the outline of the stud convex welding gun head with the same diameter D30 outside;

[0047] The positioning holes designed for the vehicle are selected as the reference holes for augmented reality laser positioning. Generally, the body-in-white welding positioning holes defined in the vehicle size are selected as the reference. The commonly used hole sizes are: 8mm / 10mm. Different adapter connectors are selected according to the needs, and the target ball is connected. The minimum reference deviation is adjusted by selecting different positioning reference holes in the spatial position.

[0048] Connect the laser projection device, import the positioning hole features and positioning point coordinate features in the pre-processed 3D digital model file in STEP or IGES format, perform data decoding and post-processing; adjust the focus and set display brightness, projection range and other parameters to establish an augmented reality matrix;

[0049] Use the real-time capture command to capture the target ball and establish a coordinate system, adjust the laser projection contrast and incident angle, display clarity, set envelope brightness, projection range and other parameters, control the size position deviation within + / -1mm, extract the "cross" shape of the positioning target coordinates and the corresponding stud projection welding gun head contour of D30 in the software interface, and project the contour features onto the target vehicle through laser projection;

[0050] Use a special marking pen to accurately mark the laser projection line of the stud welding gun head outline on the car body to achieve positioning; if the number of studs to be positioned is less than 5, you can also use the welding gun directly without marking;

[0051] After positioning is completed, the grounding and fastening studs are welded according to the marked positions, and the welding points are post-processed to ensure that the welding points are neat and free of welding slag to ensure that the entire vehicle is well grounded.

[0052] This vehicle connection point positioning method does not require cumbersome processes such as tooling design, manufacturing, and verification, and successfully eliminates the vehicle's grounding stud-specific positioning tooling, and uses augmented reality technology to achieve digital, visual, and flexible positioning of the vehicle.

[0053] The present invention also includes a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in any one or more of the aforementioned embodiments are implemented. Therefore, the technical features and technical effects possessed by the computer program correspond to the previous description, and will not be repeated here.

[0054] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A vehicle connection point positioning method, characterized in that: The vehicle connection point positioning method comprises the following steps: a) receiving vehicle body data, target data and connection point data; b) Using a projection device to project onto a target on the vehicle to determine the relative position relationship between the projection device and the vehicle body; c) Use a projection device to project onto the connection point on the vehicle.

2. The vehicle connection point positioning method according to claim 1, characterized in that: The vehicle body data includes the three-dimensional size of the vehicle body, the target data includes the position and number of targets, and the connection point data includes the position and number of connection points.

3. The vehicle connection point positioning method according to claim 1, characterized in that: The target is a target ball, and the target ball is fixed to the vehicle body through an adapter.

4. The vehicle connection point positioning method according to claim 1, characterized in that: After step b), a projection device is used to project onto the vehicle body to adjust the deviation.

5. The vehicle connection point positioning method according to claim 4, characterized in that: There are at least two targets on the vehicle.

6. The vehicle connection point positioning method according to claim 5, characterized in that: Select different targets to reduce bias.

7. The vehicle connection point positioning method according to claim 1, characterized in that: In step c), a projection device is used to project onto the center and / or the contour of the connection point.

8. The vehicle connection point positioning method according to claim 1, characterized in that: After step c), the projection of the projection device on the vehicle is marked.

9. The vehicle connection point positioning method according to claim 1, characterized in that: After step c), the connection points are welded using welding equipment.

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 9 are implemented.

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