Body-in-white air tightness detection method, device, equipment and medium

Abstract

The invention discloses a body-in-white air tightness detection method, device and equipment and a medium, and belongs to the technical field of automobiles. The body-in-white air tightness detection method comprises the steps that before air tightness detection, the first mass of a body-in-white is acquired; after airtightness detection is completed, the second mass of the body-in-white is obtained, the airtightness detection includes the steps that the body-in-white after plugging is completed is moved into a container containing liquid of the target color and kept for a preset duration, when the preset duration is reached, the body-in-white is moved out of the container, the liquid of the target color on the outer surface of the body-in-white is removed, and the second mass of the body-in-white is obtained. Wherein the top of the body-in-white needs to be completely covered with target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white; and based on the first mass, the second mass, the preset duration and the density of the target color liquid, determining the leakage amount of the body-in-white, so that the body-in-white air tightness detection efficiency can be improved, and the test cost can be reduced.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a body-in-white air tightness detection method, device, equipment and computer-readable storage medium. Background Art

[0002] During the automobile development process, the body-in-white needs to be tested for air tightness. The body-in-white air tightness test is one of the conventional tests for automobile noise, vibration and harshness (NVH), which is closely related to the NVH performance of the automobile, especially the medium and high frequency noise inside the car. How to efficiently test the air tightness of the body-in-white has become an urgent problem to be solved.

[0003] In the related art, a blower is used to blow air into the sealed BIW to make the air pressure inside the vehicle higher than the air pressure outside the vehicle. Since the vehicle inevitably has some holes and gaps that are connected to the outside world, the gas inside the vehicle will leak through these holes and gaps. It is necessary to continuously blow air into the vehicle and adjust the air volume. When the pressure difference between the inside and outside of the vehicle reaches the set value and remains stable, the air volume when the pressure difference is maintained is taken as the leakage amount.

[0004] However, because the pressure inside the car is different, the leakage amount is also different, so it is necessary to detect the leakage amount under a series of pressure differences, which makes the detection process time-consuming and labor-intensive, and the detection efficiency is low. In addition, the detection requires the use of a dedicated and expensive airtightness tester, and the testing cost is high. Summary of the invention

[0005] The present application provides a method, device, equipment and computer-readable storage medium for testing the air tightness of a body in white, which can solve the technical problems existing in the prior art that, when performing air tightness testing on the body in white, a blower is used to blow air into the inside of the body in white after being sealed, and leakage amounts under a series of pressure differences need to be tested, resulting in a time-consuming and labor-intensive testing process, low testing efficiency and high testing costs.

[0006] In a first aspect, an embodiment of the present application provides a method for detecting air tightness of a body-in-white, the method comprising:

[0007] Obtain the first quality of the body in white before air tightness testing;

[0008] After completing the air tightness test, obtaining the second mass of the body-in-white, wherein the air tightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time, and when the preset time is reached, moving the body-in-white out of the container and clearing the target color liquid on the outer surface of the body-in-white, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself;

[0009] The leakage amount of the body-in-white is determined based on the first mass, the second mass, the preset time period, and the density of the target color liquid.

[0010] In combination with the first aspect, in one implementation, the leakage amount of the body-in-white is determined based on the first mass, the second mass, the preset time and the density of the target color liquid, and the corresponding formula is:

[0011]

[0012] Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

[0013] In combination with the first aspect, in one implementation, after determining the leakage amount of the body-in-white, the method further includes:

[0014] comparing the leakage amount of the body-in-white with a preset threshold;

[0015] When the leakage amount of the BIW is less than or equal to a preset threshold, it is determined that the air tightness test result of the BIW is qualified; otherwise, it is determined that the air tightness test result of the BIW is unqualified.

[0016] In combination with the first aspect, in one implementation, the method further includes:

[0017] During the air tightness test of the BIW, the leakage point of the BIW is determined based on the shooting results of the inside of the BIW by a camera device, wherein the camera device is arranged inside the BIW and its shooting range covers all areas inside the BIW.

[0018] In combination with the first aspect, in one implementation, determining the leakage point of the BIW based on the shooting result obtained by shooting the inside of the BIW by a camera device includes:

[0019] The area outside the target color pixel in the first frame of the shooting result is used as the detection area;

[0020] Starting from the second frame of the shooting result, determining whether the detection area of ​​each frame of the picture contains a target color pixel;

[0021] If there is a picture containing target color pixels in the detection area, then the picture with the smallest frame number among the pictures containing target color pixels in the detection area is used as the target picture;

[0022] The target position corresponding to the position of the target color pixel in the detection area of ​​the target image inside the body-in-white is determined, and the target position is used as the leakage point of the body-in-white.

[0023] In a second aspect, an embodiment of the present application provides a body-in-white air tightness detection device, the body-in-white air tightness detection device comprising:

[0024] A first acquisition module, used for acquiring a first mass of the body-in-white before air tightness detection;

[0025] A second acquisition module is used to acquire the second mass of the body-in-white after completing the airtightness test, wherein the airtightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time, and when the preset time is reached, the body-in-white is moved out of the container, and the target color liquid on the outer surface of the body-in-white is cleared, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself;

[0026] The first determination module is used to determine the leakage amount of the body-in-white based on the first mass, the second mass, the preset time and the density of the target color liquid.

[0027] In conjunction with the second aspect, in one implementation, the first determination module is specifically configured to determine the leakage amount of the body-in-white according to the following formula:

[0028]

[0029] Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

[0030] In combination with the second aspect, in one implementation, the vehicle body-in-white air tightness detection device further includes a second determination module, and the second determination module is specifically configured to:

[0031] comparing the leakage amount of the body-in-white with a preset threshold;

[0032] When the leakage amount of the BIW is less than or equal to a preset threshold, it is determined that the air tightness test result of the BIW is qualified; otherwise, it is determined that the air tightness test result of the BIW is unqualified.

[0033] In a third aspect, an embodiment of the present application provides a body-in-white air tightness detection device, which includes a processor, a memory, and a body-in-white air tightness detection program stored in the memory and executable by the processor, wherein when the body-in-white air tightness detection program is executed by the processor, the steps of the body-in-white air tightness detection method described in any one of the first aspects are implemented.

[0034] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which a body-in-white air tightness detection program is stored. When the body-in-white air tightness detection program is executed by a processor, the steps of the body-in-white air tightness detection method as described in any one of the first aspects are implemented.

[0035] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0036] The method obtains a first mass of the body-in-white before the air-tightness test; and obtains a second mass of the body-in-white after the air-tightness test is completed, wherein the air-tightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time. When the preset time is reached, the body-in-white is moved out of the container, and the target color liquid on the outer surface of the body-in-white is cleared, wherein the top of the body-in-white needs to be completely covered with the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself; then based on the first mass, the second mass, the preset time and the density of the target color liquid, the leakage amount of the body-in-white is determined, thereby solving the technical problem in the related art that it is necessary to detect the leakage amount under a series of pressure differences, resulting in a time-consuming and labor-intensive detection process, low detection efficiency and high testing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the process of the first embodiment of the body-in-white air tightness detection method of the present application;

[0038] Figure 2 This is a schematic diagram of the functional modules of an embodiment of the body-in-white air tightness detection device of the present application;

[0039] Figure 3 This is a schematic diagram of the hardware structure of the body-in-white air tightness detection equipment involved in the embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It is understandable that before the air tightness test of the body in white, some preparation work needs to be done to complete the sealing of the body in white:

[0042] The first step is to install the front and rear windshields and sunroof glass and their sealants on the body-in-white, and seal the holes on the body-in-white (process holes, drainage holes, wiring harness holes, air-conditioning air inlets, etc.) with sealing plugs or tape.

[0043] The second step is to install the hinges of the four doors on the body in white, and install the four door sheets on the body in white through the door hinges; install all the sealing strips on the doors (referred to as door sealing strips) and all the sealing strips on the body in white door frames (referred to as door frame sealing strips); and install the door locks. In principle, ensure that the sealing of the body in white doors is consistent with the sealing of the vehicle doors.

[0044] Step 3: Refer to step 2 and do the same treatment on the tailgate sheet metal of the body in white.

[0045] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0046] In a first aspect, an embodiment of the present application provides a method for detecting air tightness of a body-in-white.

[0047] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the body-in-white air tightness detection method of the present application. Figure 1 As shown, the body-in-white air tightness detection method includes:

[0048] Step 110: obtaining a first mass of the body-in-white before air tightness testing;

[0049] In a specific implementation, before the air tightness test, the body in white is weighed to obtain the first mass of the body in white.

[0050] It should be noted that the first mass of the body in white may be the mass of the body in white before executing the first step in the above-mentioned pre-test preparation work, or the mass of the body in white after completing the first step and before carrying out the second step, or the mass of the body in white after completing the second step and before carrying out the third step, or the mass of the body in white after completing the third step.

[0051] Step 120, after completing the air tightness test, obtaining the second mass of the body-in-white, wherein the air tightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time, and when the preset time is reached, moving the body-in-white out of the container and clearing the target color liquid on the outer surface of the body-in-white, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself;

[0052] It should be noted that the body-in-white air tightness detection method provided in the present application utilizes the common fluid (permeable) characteristics of liquid and air, and uses colored liquid to replace the colorless air medium in the traditional body-in-white air tightness test to carry out air tightness testing. Compared with traditional air tightness detection methods, the detection effect is better.

[0053] Among them, the color of the white body itself is usually silvery white, so the color of the target color liquid is a color that is obviously different from the silvery white, such as red, blue, yellow, etc. For example, taking the target color liquid as red liquid as an example, the air tightness detection process is described as follows:

[0054] The sealed BIW with the roof facing upward is moved into a container filled with red liquid by a crane or other device. When the top of the BIW is completely covered by the red liquid, the timing starts and the preset time is maintained, which includes but is not limited to 10 minutes, 30 minutes, 45 minutes, 60 minutes, etc. When the preset time is reached, the BIW with the roof facing upward is moved out of the container by a crane or other device, and all the red liquid on the outer surface of the BIW is removed. Among them, the container can directly use the existing electric tank of the car company, and there is no need to purchase expensive air tightness testers, which reduces the testing cost.

[0055] Furthermore, after the air tightness test is completed, the body in white is weighed to obtain a second mass of the body in white.

[0056] It should be noted that after the air tightness test is completed, except for the red liquid that has penetrated into the body-in-white, the state of the body-in-white when obtaining the second mass of the body-in-white needs to be consistent with the state when the mass of the body-in-white is measured in step 110, that is, if the first mass of the body-in-white in step 110 is the mass of the body-in-white before the first step in the above-mentioned preparatory work before the test is performed, then the second mass of the body-in-white in step 120 is the mass after all the components installed in the first, second and third steps are removed; if the first mass of the body-in-white in step 110 is the mass of the body-in-white after the first step is completed and before the second step is performed, then the second mass of the body-in-white in step 120 is the mass after all the components installed in the second and third steps are removed; if the first mass of the body-in-white in step 110 is the mass of the body-in-white after the second step is completed and before the third step is performed, then the second mass of the body-in-white in step 120 is the mass after all the components installed in the third step are removed; if the first mass of the body-in-white in step 110 is the mass of the body-in-white after the third step is completed, then no removal is required when measuring the second mass of the body-in-white in step 120.

[0057] Step 130: Determine the leakage amount of the body-in-white based on the first mass, the second mass, the preset time, and the density of the target color liquid.

[0058] Among them, the leakage of the white body is the volume of red liquid that penetrates into the white body per unit time. The smaller the value, the better the air tightness of the white body.

[0059] Furthermore, the flow rate of the colored liquid infiltrating into the body-in-white is calculated using the mass difference of the body-in-white before and after the test, the density of the colored liquid, and the duration of time the body-in-white is immersed in the red liquid, and is used as an evaluation index of the air tightness of the body-in-white. Specifically, the first mass, the second mass, the preset duration, and the density of the target color liquid are substituted into the formula for determining the leakage amount of the body-in-white to obtain the leakage amount of the body-in-white.

[0060] In this embodiment, before the air tightness test, the first mass of the body-in-white is obtained; after the air tightness test is completed, the second mass of the body-in-white is obtained, wherein the air tightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time. When the preset time is reached, the body-in-white is moved out of the container, and the target color liquid on the outer surface of the body-in-white is cleared, wherein the top of the body-in-white needs to be completely covered with the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself; then based on the first mass, the second mass, the preset time and the density of the target color liquid, the leakage amount of the body-in-white is determined, which solves the technical problem in the related art that it is necessary to detect the leakage amount under a series of pressure differences, resulting in a time-consuming and labor-intensive detection process, low detection efficiency, and high testing cost.

[0061] Further, in one embodiment, the leakage amount of the body-in-white is determined based on the first mass, the second mass, the preset time and the density of the target color liquid, and the corresponding formula is:

[0062]

[0063] Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

[0064] In this embodiment, a specific calculation formula for determining the leakage amount of the body-in-white is provided. The calculation process is simple and quick, and the efficiency of determining the leakage amount of the body-in-white can be improved.

[0065] Furthermore, in one embodiment, after determining the leakage amount of the body-in-white, the method further includes:

[0066] Step 210, comparing the leakage amount of the body-in-white with a preset threshold;

[0067] In specific implementation, the body-in-white leakage of many models can be measured to form a database, and then the body-in-white air tightness target value, i.e., the preset threshold value, can be formulated based on the database. By comparing the body-in-white leakage with the preset threshold value, it can be determined whether the body-in-white air tightness test result is qualified.

[0068] Step 220: When the leakage amount of the BIW is less than or equal to a preset threshold, the air tightness test result of the BIW is determined to be qualified; otherwise, the air tightness test result of the BIW is determined to be unqualified.

[0069] When the leakage amount of the body-in-white is less than or equal to the preset threshold, it means that the air tightness of the body-in-white meets the requirements, and the air tightness test result of the body-in-white is determined to be qualified; when the leakage amount of the body-in-white is greater than the preset threshold, it means that the air tightness of the body-in-white does not meet the requirements, and the air tightness test result of the body-in-white is determined to be unqualified.

[0070] In this embodiment, the leakage amount of the body in white is compared with a preset threshold value, and then whether the air tightness test result of the body in white is qualified is determined based on the comparison result. Since the calculation process for determining the leakage amount of the body in white in this application is simple and the calculation speed is fast, the efficiency of determining the air tightness test result is indirectly improved.

[0071] Furthermore, in one embodiment, the method further includes:

[0072] During the air tightness test of the BIW, the leakage point of the BIW is determined based on the shooting results of the inside of the BIW by a camera device, wherein the camera device is arranged inside the BIW and its shooting range covers all areas inside the BIW.

[0073] In the related art, the smoke method is often used to find the leak point, that is, a smoke generator is placed inside the car, and the smoke will leak out of the car through the holes and gaps on the white body; the leak point is found by observing the location of the smoke leak outside the car. However, when using the smoke method to find the leak point, it is necessary to purchase equipment such as smoke generators, which leads to high testing costs. In addition, since the smoke is colorless and has a low smoke pressure, the search effect is not good for some small leak points on the white body.

[0074] In specific implementation, during the preparation work before the air tightness test of the body-in-white, that is, after the installation of the doors and tailgate is completed, several cameras can be installed inside the body-in-white through brackets to record the interior of the body-in-white; the recording range of the several cameras covers all areas inside the body-in-white, leaving no blind spots.

[0075] After the sealed body-in-white with the roof facing upward is moved into a container filled with red liquid by a crane or other equipment, and after the top of the body-in-white is completely covered with the red liquid, the in-car camera can be activated by a remote control device to record the process of the red liquid seeping into the interior of the body-in-white. When the preset time is reached, the recording is stopped to obtain the recording results; then the recording results are processed to accurately find the leakage point of the body-in-white.

[0076] In this embodiment, during the air tightness test of the body-in-white, the leakage point of the body-in-white is determined by photographing the interior of the body-in-white with a camera device. There is no need to purchase testing equipment such as a smoke generator, which reduces the testing cost. The shooting results are automatically processed by image processing, which can improve the accuracy and efficiency of determining the leakage point.

[0077] Further, in one embodiment, the determining the leakage point of the BIW based on the shooting result obtained by shooting the inside of the BIW by a camera device includes:

[0078] Step 310: taking the area outside the target color pixels in the first frame of the shooting result as the detection area;

[0079] It can be understood that the shooting result is composed of many frames of pictures. The first frame of the shooting result is extracted. At this time, the white body has just entered the container and it can be considered that no red liquid has penetrated into the white body. Therefore, all the red pixels in this frame are images of the red liquid outside the white body. The area where the non-red pixels in this frame are located is called the detection area.

[0080] Step 320: starting from the second frame of the shooting result, determine whether the detection area of ​​each frame of the picture contains a target color pixel;

[0081] Furthermore, the second to last frames of the shooting results are sequentially extracted, and the detection area of ​​each frame is analyzed (the detection area of ​​all the pictures in the shooting results is the same, which is the area where the non-red pixels in the first frame are located) to determine whether there are red pixels, and determine whether there is a leakage point based on the judgment result. If not, it indicates that the red liquid did not leak into the body-in-white at the corresponding time. If it exists, it indicates that the red liquid leaked into the body-in-white at the corresponding time, and there is a leakage point in the body-in-white.

[0082] Step 330: If there is a picture containing target color pixels in the detection area, then from the pictures containing target color pixels in the detection area, the picture with the smallest frame number is used as the target picture;

[0083] Furthermore, if there is a picture containing target color pixels in the detection area, then find the picture with the earliest red pixel, that is, the picture with the smallest frame number, from the pictures containing target color pixels in the detection area, and use the picture with the smallest frame number as the target picture. The reason for finding the picture with the earliest red pixel is that the red liquid that first leaked into the body-in-white will continue to flow downward under the action of gravity. Only the picture with the earliest red pixel can provide information about the leakage point, so that we can further find the leakage point of the body-in-white.

[0084] Step 340: Determine the target position corresponding to the position of the target color pixel in the detection area of ​​the target image inside the BIW, and use the target position as the leakage point of the BIW.

[0085] Furthermore, by comparing the position of the target color pixel in the detection area of ​​the target image with the actual vehicle, the corresponding target position inside the body-in-white, that is, the leakage point on the body-in-white, can be determined.

[0086] In this embodiment, the area outside the target color pixels in the first frame of the shooting result is used as the detection area; starting from the second frame of the shooting result, it is determined whether the detection area of ​​each frame contains the target color pixels; if there is a picture containing the target color pixels in the detection area, then from the pictures containing the target color pixels in the detection area, the picture with the smallest frame number is used as the target picture; the position of the target color pixels in the detection area of ​​the target picture is determined to be the target position corresponding to the inside of the body-in-white, and the target position is used as the leakage point of the body-in-white. The shooting results can be automatically processed by using an image processing method, so that the accuracy of finding the leakage point is higher and the efficiency is faster.

[0087] In a second aspect, an embodiment of the present application also provides a body-in-white air tightness detection device.

[0088] In one embodiment, referring to Figure 2 , Figure 2 This is a functional module diagram of an embodiment of the body-in-white air tightness detection device of the present application. Figure 2 As shown, the body-in-white air tightness detection device 200 includes:

[0089] A first acquisition module 210 is used to acquire a first mass of the body-in-white before air tightness detection;

[0090] The second acquisition module 220 is used to acquire the second mass of the body-in-white after completing the airtightness test, wherein the airtightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time. When the preset time is reached, the body-in-white is moved out of the container and the target color liquid on the outer surface of the body-in-white is cleared, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself;

[0091] The first determination module 230 is used to determine the leakage amount of the body-in-white based on the first mass, the second mass, the preset time and the density of the target color liquid.

[0092] Further, in one embodiment, the first determination module is specifically used to determine the leakage amount of the body-in-white according to the following formula:

[0093]

[0094] Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

[0095] Furthermore, in one embodiment, the body-in-white air tightness detection device further includes a second determination module, and the second determination module is specifically used to:

[0096] comparing the leakage amount of the body-in-white with a preset threshold;

[0097] When the leakage amount of the BIW is less than or equal to a preset threshold, it is determined that the air tightness test result of the BIW is qualified; otherwise, it is determined that the air tightness test result of the BIW is unqualified.

[0098] Furthermore, in one embodiment, the body-in-white air tightness detection device further includes a third determination module, and the third determination module is specifically used to:

[0099] During the air tightness test of the BIW, the leakage point of the BIW is determined based on the shooting results of the inside of the BIW by a camera device, wherein the camera device is arranged inside the BIW and its shooting range covers all areas inside the BIW.

[0100] Furthermore, in one embodiment, the third determining module is specifically configured to:

[0101] The area outside the target color pixel in the first frame of the shooting result is used as the detection area;

[0102] Starting from the second frame of the shooting result, determining whether the detection area of ​​each frame of the picture contains a target color pixel;

[0103] If there is a picture containing target color pixels in the detection area, then the picture with the smallest frame number among the pictures containing target color pixels in the detection area is used as the target picture;

[0104] The target position corresponding to the position of the target color pixel in the detection area of ​​the target image inside the body-in-white is determined, and the target position is used as the leakage point of the body-in-white.

[0105] Among them, the functional implementation of each module in the above-mentioned body-in-white air tightness detection device corresponds to each step in the above-mentioned body-in-white air tightness detection method embodiment, and its functions and implementation processes are no longer repeated here one by one.

[0106] In a third aspect, an embodiment of the present application provides a body-in-white air tightness detection device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0107] Reference Figure 3 , Figure 3 The hardware structure diagram of the body-in-white air tightness detection device involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the body-in-white air tightness detection device may include a processor, a memory, a communication interface, and a communication bus.

[0108] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0109] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the body-in-white airtightness testing equipment, and the interface used to realize the interconnection between the body-in-white airtightness testing equipment and other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0110] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0111] The processor may be a general-purpose processor, which may call the BIW air tightness detection program stored in the memory and execute the BIW air tightness detection method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the BIW air tightness detection program is called may refer to the various embodiments of the BIW air tightness detection method of the present application, which will not be described in detail here.

[0112] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0113] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0114] The computer-readable storage medium of the present application stores a body-in-white air tightness detection program, wherein when the body-in-white air tightness detection program is executed by a processor, the steps of the body-in-white air tightness detection method as described above are implemented.

[0115] Among them, the method implemented when the body-in-white air tightness detection program is executed can refer to the various embodiments of the body-in-white air tightness detection method of the present application, and will not be repeated here.

[0116] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0117] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0118] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0119] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0120] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0121] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0122] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for detecting air tightness of a body-in-white, characterized in that: The body-in-white air tightness detection method comprises: Obtain the first quality of the body in white before air tightness testing; After completing the air tightness test, obtaining the second mass of the body-in-white, wherein the air tightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time, and when the preset time is reached, moving the body-in-white out of the container and clearing the target color liquid on the outer surface of the body-in-white, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself; The leakage amount of the body-in-white is determined based on the first mass, the second mass, the preset time period, and the density of the target color liquid.

2. The body-in-white air tightness detection method according to claim 1, characterized in that: The leakage amount of the body-in-white is determined based on the first mass, the second mass, the preset time and the density of the target color liquid, and the corresponding formula is: Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

3. The body-in-white air tightness detection method according to claim 1, characterized in that: After determining the leakage amount of the body-in-white, the method further comprises: comparing the leakage amount of the body-in-white with a preset threshold; When the leakage amount of the BIW is less than or equal to a preset threshold, it is determined that the air tightness test result of the BIW is qualified; otherwise, it is determined that the air tightness test result of the BIW is unqualified.

4. The body-in-white air tightness detection method according to claim 1, characterized in that: The method further comprises: During the air tightness test of the BIW, the leakage point of the BIW is determined based on the shooting results of the inside of the BIW by a camera device, wherein the camera device is arranged inside the BIW and its shooting range covers all areas inside the BIW.

5. The body-in-white air tightness detection method according to claim 4, characterized in that: The method of determining the leakage point of the BIW based on the shooting result of the inside of the BIW by the camera device comprises: The area outside the target color pixel in the first frame of the shooting result is used as the detection area; Starting from the second frame of the shooting result, determining whether the detection area of ​​each frame of the picture contains a target color pixel; If there is a picture containing target color pixels in the detection area, then the picture with the smallest frame number among the pictures containing target color pixels in the detection area is used as the target picture; The target position corresponding to the position of the target color pixel in the detection area of ​​the target image inside the body-in-white is determined, and the target position is used as the leakage point of the body-in-white.

6. A body-in-white air tightness detection device, characterized in that: The body-in-white air tightness detection device comprises: A first acquisition module, used for acquiring a first mass of the body-in-white before air tightness detection; A second acquisition module is used to acquire the second mass of the body-in-white after completing the airtightness test, wherein the airtightness test includes moving the body-in-white after the plugging is completed into a container filled with a target color liquid and keeping it for a preset time, and when the preset time is reached, the body-in-white is moved out of the container, and the target color liquid on the outer surface of the body-in-white is cleared, wherein the top of the body-in-white needs to be completely covered by the target color liquid, and the color of the target color liquid is obviously different from the color of the body-in-white itself; The first determination module is used to determine the leakage amount of the body-in-white based on the first mass, the second mass, the preset time and the density of the target color liquid.

7. The vehicle body in white air tightness detection device according to claim 6, characterized in that: The first determination module is specifically used to determine the leakage amount of the body-in-white according to the following formula: Wherein, L is the leakage amount of the body in white, M1 is the second mass, M0 is the first mass, T is the preset time, and ρ is the density of the target color liquid.

8. The air tightness detection device for the vehicle body in white according to claim 6, characterized in that: The body-in-white air tightness detection device further includes a second determination module, and the second determination module is specifically used to: comparing the leakage amount of the body-in-white with a preset threshold; When the leakage amount of the BIW is less than or equal to a preset threshold, it is determined that the air tightness test result of the BIW is qualified; otherwise, it is determined that the air tightness test result of the BIW is unqualified.

9. A body-in-white air tightness testing device, characterized in that: The body-in-white air tightness detection device includes a processor, a memory, and a body-in-white air tightness detection program stored in the memory and executable by the processor, wherein when the body-in-white air tightness detection program is executed by the processor, the steps of the body-in-white air tightness detection method as described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a BIW air tightness detection program, wherein when the BIW air tightness detection program is executed by a processor, the steps of the BIW air tightness detection method according to any one of claims 1 to 5 are implemented.

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