Body-in-white conveying system, gap face difference online measurement system and control method thereof

Abstract

The present application relates to the technical field of vehicles, and particularly provides a body-in-white transmission system, a gap difference online measurement system and a control method thereof, aiming to solve the problems of slow transmission speed of the existing roll bed system for transporting the body-in-white and the inability to meet the gap difference online measurement of high-tact production lines. To this end, the body-in-white transmission system comprises a first control station, an intermediate transmission station, a second control station and a gap difference online measurement station connected in sequence, the first control station is used for transporting the body-in-white to the intermediate transmission station, the intermediate transmission station is used for transporting the body-in-white to the second control station at a constant speed, the second control station is used for transporting the body-in-white to the gap difference online measurement station, the first control station and the second control station can both adjust the transmission speed, and the gap difference online measurement station transmits the body-in-white after the measurement work to the next system in a speed-adjustable manner. The transmission speed is adjusted to prolong the gap difference online measurement time.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically providing a transmission system for a body-in-white, an online measurement system for gap and surface difference, and a control method thereof. Background Technology

[0002] Currently, the measurement of gaps and surface differences in body-in-white is mostly done manually. This method is inefficient, has large measurement errors, and is slow to produce results. The subsequent data analysis and processing also take a long time. Furthermore, the gaps and surface differences in the body-in-white do not correspond well with those in the final assembly, resulting in large adjustments to the gaps and surface differences that require a long time. This is detrimental to the quality control of the body-in-white.

[0003] With the development of automatic measurement technology, although some companies have used online automatic measurement technology, the slow roller conveyor speed of the ordinary follow-up conveyor system on the line and the long time occupied by the transmission make it impossible to efficiently complete the measurement problem under high-cycle production lines.

[0004] Accordingly, there is a need in the art for a new transfer system for body-in-white to solve the problem that existing roller bed systems for transporting body-in-white have slow transfer speeds and cannot meet the requirements for online measurement of gap surface differences in high-speed production lines. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problem that the existing roller bed system for transporting body-in-white has a slow transmission speed and cannot meet the requirements of online measurement of gap surface difference in high-speed production lines.

[0006] In a first aspect, the present invention provides a transfer system for a body-in-white, the transfer system comprising a first control station, an intermediate transfer station, a second control station, and a clearance / surface difference online measurement station connected in sequence. The first control station is used to transport the body-in-white to the intermediate transfer station and is configured to adjust the transport speed. The intermediate transfer station is used to transport the body-in-white at a constant speed to the second control station. The second control station is used to transport the body-in-white to the clearance / surface difference online measurement station and is configured to adjust the transport speed. The clearance / surface difference online measurement station is used to limit the movement of the body-in-white during clearance / surface difference online measurement and to transfer the body-in-white after the clearance / surface difference online measurement is completed to the next system in a speed-adjustable manner.

[0007] In the preferred technical solution of the above-mentioned body-in-white transmission system, the gap surface difference online measurement station includes a limiting device and a conveying device. The conveying device can adjust the running speed during transmission. The limiting device includes an X-axis limiting device and a Y-axis limiting device. The X-axis limiting device is used to limit the position of the body-in-white in the running direction, and the Y-axis limiting device is used to limit the position of the body-in-white on the left and right sides in the running direction.

[0008] In the preferred embodiment of the above-mentioned body-in-white transmission system, the transmission system further includes a sled, which is used to carry the body-in-white. The sled carries the body-in-white through the first control station, the intermediate transmission station, the second control station, and the gap surface difference online measurement station. After the sled reaches the gap surface difference online measurement station, the X-direction limiting device restricts the position of the sled's running direction, and the Y-direction limiting device restricts the positions of the left and right sides of the sled's running direction.

[0009] The present invention also provides an online measurement system for gap and surface difference of a body-in-white, the online measurement system for gap and surface difference of a body-in-white including the transmission system of the body-in-white as described in any of the above preferred technical solutions, and the online measurement system for gap and surface difference of a body-in-white further including an online measurement device for gap and surface difference.

[0010] In the preferred embodiment of the above-mentioned online measurement system for gap and surface difference of body-in-white, the online measurement device for gap and surface difference includes an online detection robot and a positioning detection device. The online detection robot is used to detect the measuring points on the body-in-white, and the positioning detection device is used to detect whether the body-in-white has reached the position to be measured.

[0011] Furthermore, the present invention also provides a control method for an online gap and surface difference measurement system for a body-in-white. The online gap and surface difference measurement system includes a transmission system comprising a first control station, an intermediate transmission station, a second control station, and an online gap and surface difference measurement station connected sequentially. The control method includes: controlling the body-in-white to move to the first control station at a first speed; controlling the first control station to reduce the body-in-white speed from the first speed to a second speed and then transmitting the body-in-white to the intermediate transmission station at the second speed; and controlling the intermediate transmission station to uniformly move the body-in-white at the second speed. The system moves at a second speed and transfers the body-in-white to the second control station at the second speed; the second control station is controlled to accelerate the body-in-white to the third speed and transfer it to the gap / surface difference online measurement station at the third speed; the gap / surface difference online measurement station is controlled to move the body-in-white to the set position of the gap / surface difference online measurement station at the third speed and then stops moving. After a stop time T, the gap / surface difference online measurement station is controlled to accelerate the body-in-white to the fourth speed and transfer it out of the gap / surface difference online measurement station at the fourth speed.

[0012] In the preferred embodiment of the control method for the above-mentioned online measurement system for gap and surface difference of a body-in-white, the online measurement system for gap and surface difference further includes an online measurement device for gap and surface difference. The online measurement device for gap and surface difference includes an online detection robot and a positioning detection device. The positioning detection device is communicatively connected to the online detection robot. The step of "controlling the online measurement station for gap and surface difference to move the body-in-white at the third speed to the set position of the online measurement station for gap and surface difference and then stopping the movement, and after a stop time T, controlling the online measurement station for gap and surface difference to accelerate the body-in-white to the fourth speed and then transmitting the body-in-white out at the fourth speed" further includes: controlling the online measurement station for gap and surface difference to move the body-in-white at the third speed to the set position of the online measurement station for gap and surface difference and then stopping the movement, controlling the positioning detection device to detect whether the body-in-white has reached the position to be measured; when the positioning detection device detects that the body-in-white has reached the position to be measured, controlling the online detection robot to move and detect the measuring points on the body-in-white; after a stop time T, controlling the online measurement station for gap and surface difference to accelerate the body-in-white to the fourth speed and then transmitting the body-in-white out at the fourth speed.

[0013] In the preferred embodiment of the control method for the above-mentioned online measurement system for gap and surface difference of body-in-white, the step of "controlling the movement of the online inspection robot and detecting the measuring points on the body-in-white" further includes: controlling the online inspection robot to determine the vehicle model based on the position of the measuring points on the body-in-white; controlling the online inspection robot to select the corresponding measurement program based on the vehicle model and measure the measuring points.

[0014] In the preferred embodiment of the control method for the above-mentioned online measurement system for gap and surface difference of body-in-white, the control method further includes: after the online inspection robot completes the detection of the measuring points on the body-in-white, controlling the online inspection robot to return to the initial position; controlling the online inspection robot to calculate and analyze the detected data, and synchronizing the calculation and analysis results to the next workstation.

[0015] In the preferred embodiment of the control method for the above-mentioned online measurement system for gap and surface difference of the body-in-white, the online measurement system for gap and surface difference further includes a door leveling device. The step of "when the positioning detection device detects that the body-in-white has reached the position to be measured, controlling the online detection robot to move and detect the measuring points on the body-in-white" further includes: when the positioning detection device detects that the body-in-white has reached the position to be measured, controlling the door leveling device to level and align the door and side panel of the body-in-white; controlling the online detection robot to move and detect the measuring points on the body-in-white.

[0016] By adopting the above technical solution, the present invention integrates the first control station, the intermediate transmission system, the second control station, and the gap surface difference online measurement station into a transmission system. This system controls the body-in-white to quickly enter the first control station and quickly transmit the data from the second control station to the gap surface difference online measurement station, thereby saving time. Furthermore, controlling the body-in-white to quickly transmit the data to the gap surface difference online measurement station also saves time. The saved time is then used to perform online gap surface difference measurement on the body-in-white, thereby improving the accuracy of the measurement results. Attached Figure Description

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a schematic diagram of the online inspection system for the body-in-white of the present invention;

[0019] Figure 2 This is a flowchart of the main steps of the control method for the online detection system of the body-in-white of the present invention;

[0020] Figure 3 This is a flowchart of the first specific embodiment of the control method of the online detection system for the body-in-white of the present invention;

[0021] Figure 4 This is a flowchart of a second specific embodiment of the control method for the online detection system of the body-in-white of the present invention.

[0022] List of reference numerals in the attached diagram:

[0023] 1. Online inspection system; 11. Transmission system; 111. First control station; 112. Intermediate transmission station; 113. Second control station; 114. Online gap and surface difference measurement station; 115. Sled; 116. X-axis limit device; 117. Y-axis limit device; 12. Online inspection robot; 13. Position detection device; 14. Door suction leveling device; 2. Body-in-white. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the invention and are not intended to limit the scope of protection of the invention. Those skilled in the art can make adjustments as needed to adapt to specific applications.

[0025] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Figure 1 The X-direction shown is the direction of movement of the white body 2, and the Y-direction is the left and right sides of the direction of movement of the white body.

[0028] like Figure 1As shown, to solve the problem that the existing roller bed system for transporting body-in-white has a slow transmission speed and cannot meet the requirements of online gap difference measurement in high-cycle production lines, the transmission system 11 of the body-in-white 2 of the present invention includes a first control station 111, an intermediate transmission station 112, a second control station 113, and a gap difference online measurement station 114 connected in sequence. The first control station 111 is used to transport the body-in-white 2 to the intermediate transmission station 112. The intermediate transmission station 112 is used to transport the body-in-white 2 at a constant speed to the second control station 113. The second control station 113 is used to transport the body-in-white 2 to the gap difference online measurement station 114. Both the first control station 111 and the second control station 113 can adjust the transmission speed. When the body-in-white 2 needs to be measured online at the gap difference online measurement station 114, the gap difference online measurement station 114 can limit the movement of the body-in-white 2. After the gap difference online measurement is completed, the gap difference online measurement station 114 can transfer the body-in-white 2 to the next system in a speed-adjustable manner.

[0029] The traditional transmission system 11 is a conventional follower roller bed transmission system 11, which consists of multiple roller beds and continuously and uniformly transmits the body-in-white 2 on the adjustment line. In order to allow workers to perform other tasks during the transmission process, such as tightening bolts, adjusting dimensions, or checking and repairing connection points, the roller beds maintain a slow and uniform speed. However, due to the uniform and slow operation of the roller beds, and in order to meet the high production cycle, the time for subsequent online measurement of gap surface differences will be correspondingly shortened. The short measurement time will affect the accuracy of online measurement of gap surface differences and the timeliness of data processing. If only the transport speed of the roller beds is increased, although the transport time of the roller beds will be shortened accordingly, the time for workers to perform other tasks during the roller bed transmission process will also be shortened accordingly, which can easily lead to problems such as low operating accuracy and large errors for workers.

[0030] The transmission system 11 of the present invention integrates a first control station 111, an intermediate transmission station 112, a second control station 113, and a gap surface difference online measurement station 114. After the white body 2 is controlled to quickly enter the first control station 111, it is transmitted from the first control station 111 to the intermediate transmission station 112 at the running speed of the intermediate transmission station 112. After running at a constant speed for a period of time in the intermediate transmission station 112, it enters the second control station 113. Then it quickly moves from the second control station 113 to the gap surface difference online measurement station 114. After completing the measurement of the measuring points on the white body 2 at the gap surface difference online measurement station 114, the white body 2 quickly leaves the gap surface difference online measurement station 114. By quickly entering the first control station 111 and quickly entering and leaving the gap surface difference online measurement station 114, time is saved for the movement of the body-in-white 2 on the transmission system 11. The saved time is used to measure the measuring points on the body-in-white 2, which improves the stability and accuracy of the measurement and ensures the measurement accuracy of the gap surface difference online measurement. At the same time, it also increases the time for processing the measurement data.

[0031] The transmission system 11 also includes a sled 115. The online gap difference measurement station 114 includes a limiting device and a conveying device. The limiting device includes an X-axis limiting device 116 and a Y-axis limiting device 117. The sled 115 is used to carry the body-in-white 2. The sled 115 carrying the body-in-white 2 passes through the first control station 111, the intermediate transmission station 112, the second control station 113, and the online gap difference measurement station 114. After the sled 115 reaches the online gap difference measurement station 114, the X-axis limiting device 116 restricts the position of the sled 115 in the direction of travel, and the Y-axis limiting device 117 restricts the position of the left and right sides of the sled 115 in the direction of travel, so as to ensure that the body-in-white 2 can be accurately and stably fixed on the online gap difference measurement station 114 by the sled 115 during the subsequent online gap difference measurement work.

[0032] Furthermore, the present invention also provides an online gap surface difference measurement system 1 for a body-in-white 2, which has the transmission system 11 of the body-in-white 2 as described in any of the above embodiments. The online gap surface difference measurement system 1 also includes an online gap surface difference measurement device, which includes an online inspection robot 12 and a positioning detection device 13. The online inspection robot 12 is used to detect the measuring points on the body-in-white 2, and the positioning detection device 13 is used to detect whether the body-in-white 2 has reached the position to be measured. When the body-in-white 2 is transported to the online gap surface difference measurement station 114, the X-direction limiting device 116 and the Y-direction limiting device 117 limit the body-in-white 2. After the body-in-white 2 is limited, the positioning detection device 13 detects whether the body-in-white 2 is in position. After detecting that it is in position, the detected positioning signal is transmitted to the online inspection robot 12. After receiving the positioning signal, the online inspection robot 12 measures the measuring points on the body-in-white 2.

[0033] The present invention also provides a control method for an online gap and surface difference measurement system 1 for a body-in-white 2, the online gap and surface difference measurement system 1 for a body-in-white 2 being referenced. Figure 1 , Figure 2 The control method of the online gap and surface difference measurement system 1 of the white body 2 shown specifically includes the following steps:

[0034] Step S100: Control the body-in-white 2 to move to the first control station 111 at the first speed;

[0035] Step S200: Control the first control station 111 to drive the white body 2 to decrease to the second speed at the first speed and then transfer the white body 2 to the intermediate transfer station 112 at the second speed;

[0036] Step S300: Control the intermediate transfer station 112 to drive the white body 2 to move at a constant speed at the second speed and transfer the white body 2 to the second control station 113 at the second speed;

[0037] Step S400: Control the second control station 113 to drive the body-in-white 2 to accelerate to the third speed at the second speed and then transfer the body-in-white 2 to the gap surface difference online measurement station 114 at the third speed;

[0038] Step S500: Control the online gap difference measurement station 114 to drive the white body 2 to move at the third speed to the set position of the online gap difference measurement station 114 and then stop moving. After a stop time T, control the online gap difference measurement station 114 to drive the white body 2 to accelerate to the fourth speed and then transmit the white body 2 out of the online gap difference measurement station 114 at the fourth speed.

[0039] The gap and surface difference online measurement system 1 for the body-in-white 2 performs work on the adjustment line. The above mainly describes the control method of the transmission system 11 in the gap and surface difference online measurement system 1. The body-in-white 2 enters the first control station 111 at a first speed, and then the body-in-white 2 decreases from the first speed to a second speed and enters the intermediate transmission station 112 from the first control station 111 at the second speed. Since the body-in-white 2 first moves to the first control station 111 at a high speed (here, higher than the second speed) and then enters the intermediate transmission station 112 at the second speed, the high-speed operation saves the time for the body-in-white 2 to enter the transmission system 11. At the intermediate transmission station 112, it moves at a uniform second speed. At this time, the worker can perform some work simultaneously, such as tightening bolts, adjusting dimensions, or checking and repairing connection points. Afterward, the body-in-white 2 leaves the intermediate transmission station at the second speed. 112 is transmitted to the second speed adjustment station. The second control station 113 transmits the body-in-white 2 to the clearance and surface difference online measurement station 114 at a third speed higher than the second speed. After the body-in-white 2 reaches the set position of the clearance and surface difference online measurement station 114, the measuring points on the body-in-white 2 are measured. The clearance and surface difference are measured by measuring the measuring points. After the measurement is completed, the body-in-white 2 leaves the clearance and surface difference online measurement station 114 at a fourth speed. Since the fourth speed is also higher than the second speed, entering and leaving the clearance and surface difference online measurement station 114 at a high speed (higher than the second speed) saves time for the body-in-white 2 to run on the transmission system 11. All the time saved above is used to measure the measuring points on the body-in-white 2, that is, to extend the time of the body-in-white 2 at the clearance and surface difference online measurement station 114, thereby improving the accuracy and precision of the measurement.

[0040] Continue to refer to Figure 1 In the online gap difference measurement system 1, when both the online inspection robot 12 and the positioning detection device 13 are involved in the operation, such as Figure 3 As shown, the control method of the online gap and surface difference measurement system 1 for the body-in-white 2 specifically includes the following steps:

[0041] Step S100: Control the body-in-white 2 to move to the first control station 111 at the first speed;

[0042] Step S200: Control the first control station 111 to drive the white body 2 to decrease to the second speed at the first speed and then transfer the white body 2 to the intermediate transfer station 112 at the second speed;

[0043] Step S300: Control the intermediate transfer station 112 to drive the white body 2 to move at a constant speed at the second speed and transfer the white body 2 to the second control station 113 at the second speed;

[0044] Step S400: Control the second control station 113 to drive the body-in-white 2 to accelerate to the third speed at the second speed and then transfer the body-in-white 2 to the gap surface difference online measurement station 114 at the third speed;

[0045] Step S510: Control the gap surface difference online measurement station 114 to drive the white body 2 to move at the third speed to the set position of the gap surface difference online measurement station 114 and then stop moving. Control the position detection device 13 to detect whether the white body 2 has reached the position to be measured.

[0046] Step S520: When the positioning detection device 13 detects that the body-in-white 2 has reached the position to be tested, it controls the online inspection robot 12 to move and detect the measuring points on the body-in-white 2;

[0047] Step S530: After stopping for time T, control the online measurement station 114 of the clearance surface difference to accelerate the body-in-white 2 to the fourth speed and transmit the body-in-white 2 out at the fourth speed.

[0048] The control method of the above-mentioned online gap difference measurement system 1 includes: Figure 2 The control method of the transmission system 11 in the gap and surface difference online measurement system 1 shown is described below. Therefore, the following mainly introduces how the body-in-white 2 realizes the measurement of the measuring points at the gap and surface difference online measurement station 114. After the body-in-white 2 moves to the set station at the third speed and stops at the gap and surface difference online measurement station 114, the position detection device 13 first detects whether the body-in-white 2 has reached the position to be measured. When the position detection device 13 detects that the body-in-white 2 has reached the position to be measured, the position detection device 13 transmits the detection signal to the online inspection robot 12. The online inspection robot 12 receives the signal and detects the corresponding gap and surface difference by detecting the relevant measuring points. After time T, the detection is completed, and the gap and surface difference online measurement station 114 transmits the body-in-white 2 out at the fourth speed. The setting of the position detection device 13 can improve the accuracy of the position of the body-in-white 2 at the gap and surface difference online measurement station 114 and avoid the situation where the detection starts before the body-in-white 2 has reached the designated position.

[0049] Continue to refer to Figure 1 In the online gap and surface difference measurement system 1, when the online inspection robot 12 can detect the model of the body-in-white 2 and select the measurement program according to the model, such as... Figure 4 As shown, the control method of the online gap and surface difference measurement system 1 for the body-in-white 2 specifically includes the following steps:

[0050] Step S100: Control the body-in-white 2 to move to the first control station 111 at the first speed;

[0051] Step S200: Control the first control station 111 to drive the white body 2 to decrease to the second speed at the first speed and then transfer the white body 2 to the intermediate transfer station 112 at the second speed;

[0052] Step S300: Control the intermediate transfer station 112 to drive the white body 2 to move at a constant speed at the second speed and transfer the white body 2 to the second control station 113 at the second speed;

[0053] Step S400: Control the second control station 113 to drive the body-in-white 2 to accelerate to the third speed at the second speed and then transfer the body-in-white 2 to the gap surface difference online measurement station 114 at the third speed;

[0054] Step S510: Control the gap surface difference online measurement station 114 to drive the white body 2 to move at the third speed to the set position of the gap surface difference online measurement station 114 and then stop moving. Control the position detection device 13 to detect whether the white body 2 has reached the position to be measured.

[0055] Step S521: When the positioning detection device 13 detects that the body-in-white 2 has reached the position to be tested, it controls the online detection robot 12 to determine the vehicle model based on the position of the measuring point on the body-in-white 2;

[0056] Step S522: Control the online inspection robot 12 to select the corresponding measurement program according to the vehicle model and measure the measurement points;

[0057] Step S530: After stopping for time T, control the online measurement station 114 of the clearance surface difference to accelerate the body-in-white 2 to the fourth speed and transmit the body-in-white 2 out at the fourth speed.

[0058] When the arrival detection device 13 detects that the body-in-white 2 has reached the test position, the online inspection robot 12 starts working. First, the online inspection robot 12 detects the position of the measuring points on the body-in-white 2, determines the vehicle model based on the measuring point position, and then selects a measurement program matching the vehicle model to measure the relevant measuring points, thereby measuring the corresponding gaps and surface differences. After time T, the body-in-white 2 is transmitted to the gap and surface difference online measurement station 114. The above control method can meet the inspection of different vehicle models, thus it can take into account the measurement work of multiple vehicle models.

[0059] In addition, after the online inspection robot 12 completes the inspection of the measuring points on the body-in-white 2, it controls the online inspection robot 12 to return to the initial position to await the next inspection. In order to ensure that the inspection data can be synchronized to the subsequent work system in a timely and accurate manner, the online inspection robot 12 needs to perform calculation and analysis on the detected data and synchronize the calculation and analysis results to the next work station.

[0060] Meanwhile, in order to ensure the accuracy of the measurement results, before the online inspection robot 12 inspects the measuring points on the body-in-white 2, the door suction leveling device 14 can be used to suction level and align the door and side panel of the body-in-white 2. After the suction leveling work is completed, the online inspection robot 12 can perform the measurement work on the measuring points of the body-in-white 2.

[0061] It should be noted that the terms "fast" and "high" mentioned in this invention are compared with the transmission speed of the intermediate transmission station 112. To save more time and increase measurement time, the first speed entering the first transmission station and the third and fourth speeds entering and exiting the online gap difference measurement station 114 are both higher than the speed of the intermediate transmission station 112. Furthermore, the speed values ​​of the first, second, third, and fourth speeds can be set according to the needs of those skilled in the art, and all of the above are within the scope of protection of this invention.

[0062] In summary, by integrating the first control station 111, intermediate transfer station 112, second control station 113, and clearance difference online measurement station 114, the body-in-white 2 is able to quickly enter the first control station 111 and quickly leave the clearance difference online measurement station 114, saving time for the body-in-white 2 to enter and exit the transfer system 11. Similarly, the body-in-white 2's rapid entry from the second control station 113 to the clearance difference online measurement station 114 saves time during intermediate transfer within the transfer system 11. This saved time is then used for measuring the measurement points on the body-in-white 2, improving the accuracy and stability of the measurement results, ensuring the precision of the clearance difference online measurement, and reducing the time available for data processing. Furthermore, this invention can utilize the online inspection robot 12 to inspect the vehicle model of the body-in-white 2 and select the appropriate measurement program based on the model, thus ensuring compatibility with multiple vehicle models. Using the door suction device 14 to suction the door and side panel before measurement further improves the accuracy of the measurement results.

[0063] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A transmission system for a body-in-white, characterized in that, The transmission system includes a first control station, an intermediate transmission station, a second control station, and an online gap / surface difference measurement station connected in sequence. The first control station is used to decelerate the body-in-white from a first speed to a second speed, and transport the body-in-white to the intermediate transfer station at the second speed; The intermediate transfer station is used to transport the body-in-white to the second control station at a constant speed at the second speed. The second control station is used to accelerate the body-in-white from the second speed to the third speed, and transport the body-in-white to the gap surface difference online measurement station at the third speed; The gap surface difference online measurement station is used to limit the body-in-white during online measurement and to transmit the body-in-white after the online measurement is completed to the next system at a fourth speed, which is higher than the second speed.

2. The transmission system for the body-in-white according to claim 1, characterized in that, The online gap difference measurement station includes a limiting device and a conveying device. The conveying device can adjust the running speed during conveying. The limiting device includes an X-axis limiting device and a Y-axis limiting device. The X-axis limiting device is used to limit the position of the body-in-white in the running direction, and the Y-axis limiting device is used to limit the position of the body-in-white on the left and right sides in the running direction.

3. The transmission system for the body-in-white according to claim 2, characterized in that, The transmission system also includes a sled for carrying the body-in-white. The sled carries the body-in-white through the first control station, the intermediate transmission station, the second control station, and the gap surface difference online measurement station. After the sled reaches the gap surface difference online measurement station, the X-axis limiting device restricts the position of the sled's running direction, and the Y-axis limiting device restricts the position of the sled on the left and right sides of the running direction.

4. An online measurement system for gap and surface difference of a body-in-white, characterized in that, The online gap difference measurement system includes the transmission system of the body-in-white as described in any one of claims 1-3, and the online gap difference measurement system further includes an online gap difference measurement device.

5. The online measurement system for gap and surface difference of body-in-white according to claim 4, characterized in that, The online gap difference measurement device includes an online detection robot and a positioning detection device. The online detection robot is used to detect the measuring points on the body-in-white, and the positioning detection device is used to detect whether the body-in-white has reached the position to be measured.

6. A control method of a white body gap face difference online measurement system, characterized by, The online gap difference measurement system includes a transmission system, which comprises a first control station, an intermediate transmission station, a second control station, and an online gap difference measurement station connected in sequence. The control method includes: Control the body-in-white to move to the first control station at a first speed; The first control station is controlled to drive the body-in-white to decrease to a second speed at a first speed and then transfer the body-in-white to the intermediate transfer station at the second speed; The intermediate transfer station controls the white body to move at a constant speed at the second speed and transfers the white body to the second control station at the second speed; The second control station controls the white body to accelerate from the second speed to the third speed and then transfers the white body to the gap surface difference online measurement station at the third speed; The online gap difference measurement station controls the body-in-white to move at the third speed to the set position of the online gap difference measurement station and then stops moving. After a stop time T, the online gap difference measurement station controls the body-in-white to accelerate to the fourth speed and then moves the body-in-white out of the online gap difference measurement station at the fourth speed.

7. The control method of the white body gap face difference online measurement system according to claim 6, characterized in that, The online gap surface difference measurement system further includes an online gap surface difference measurement device, which includes an online inspection robot and a positioning detection device. The positioning detection device is communicatively connected to the online inspection robot. The step of "controlling the online gap surface difference measurement station to move the body-in-white at the third speed to the set position of the online gap surface difference measurement station and then stopping, and after a stop time T, controlling the online gap surface difference measurement station to accelerate the body-in-white to the fourth speed and then transmitting the body-in-white out at the fourth speed" further includes: The system controls the online gap difference measurement station to move the body-in-white at the third speed to the set position of the online gap difference measurement station and then stops moving. The system then controls the positioning detection device to detect whether the body-in-white has reached the position to be measured. When the positioning detection device detects that the body-in-white has reached the position to be tested, it controls the online inspection robot to move and detect the measuring points on the body-in-white; After stopping for time T, the online gap difference measurement station is controlled to accelerate the body-in-white to the fourth speed and then transmit the body-in-white out at the fourth speed.

8. The control method of the white body gap face difference online measurement system according to claim 7, characterized in that, The step of "controlling the movement of the online inspection robot and inspecting the measuring points on the body-in-white" further includes: The online inspection robot is controlled to determine the vehicle model based on the position of the measuring points on the body-in-white; The online inspection robot is controlled to select the corresponding measurement program according to the vehicle model and measure the measurement points.

9. The control method of the white body gap face difference online measurement system according to claim 8, characterized in that, The control method further includes: After the online inspection robot completes the inspection of the measuring points on the body-in-white, it is controlled to return to the initial position. The online inspection robot is controlled to perform calculations and analyses on the detected data and synchronize the results to the next workstation.

10. The control method of the white body gap face difference online measurement system according to claim 7, wherein The online gap surface difference measurement system also includes a door leveling device. The step of "when the positioning detection device detects that the body-in-white has reached the position to be measured, controlling the online detection robot to move and detect the measuring points on the body-in-white" further includes: When the positioning detection device detects that the body-in-white has reached the position to be tested, it controls the door suction device to suction and align the door and side panel of the body-in-white. The online inspection robot is controlled to move and inspect the measuring points on the body-in-white.

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