Base supporting mechanism for whole vehicle OTA test

Abstract

The utility model discloses a base supporting mechanism used for a whole vehicle OTA test, a lifting column can be installed on a supporting column in a lifting manner, an orientation rotating disc can be rotatably installed at the upper end of the lifting column, and a lifting driving device and a rotation driving device respectively drive the lifting column to lift and drive the orientation rotating disc to rotate. The control system controls the lifting driving device and the rotating driving device to operate, the wave-absorbing material wraps the outer sides of metal parts, exposed out of the outer sides, in all the mechanisms, and a vehicle supporting and positioning device capable of adjusting the supporting position on the horizontal plane is further arranged on the direction rotating disc. The vehicle supporting and positioning device can carry out adaptive adjustment according to the size of a tested vehicle and the position of an antenna so as to realize fixed positioning and position adjustment of the tested vehicle, effectively solves test errors caused by the problem of antenna eccentricity in the whole vehicle antenna test, and also can improve the stability and reliability of the test process.

Description

TECHNICAL FIELD

[0001] The utility model relates to an antenna performance test equipment, especially a base support mechanism for whole vehicle OTA test. BACKGROUND

[0002] With the rapid development of communication technology, the demand for OTA (over the air) testing of automotive antennas is increasing to ensure the performance and reliability of vehicles in various communication environments. Modern vehicles are usually equipped with multiple antennas, which are distributed at different positions of the vehicle body, resulting in a certain eccentricity of the antennas relative to the center of the vehicle. This eccentric layout makes it difficult for traditional testing methods to accurately simulate the actual use environment during OTA testing, thereby affecting the accuracy and consistency of the test results. In addition, with the diversification of vehicle size and design, the differences in vehicle length and width among different models further increase the complexity of the testing process. Therefore, it is particularly important to develop a support structure that can be flexibly adjusted to adapt to different vehicle lengths and widths. SUMMARY

[0003] To make up for the above shortcomings, the utility model provides a base support mechanism for whole vehicle OTA test, which can not only effectively solve the test error caused by antenna eccentricity, but also improve the stability and reliability of the testing process.

[0004] The utility model discloses a base support mechanism for whole vehicle OTA test, which can not only effectively solve the test error caused by antenna eccentricity, but also improve the stability and reliability of the testing process.

[0005] As a further improvement of the utility model, the vehicle support positioning device further comprises a plurality of movable supports, the two ends of the movable support in the length direction are respectively provided with a mounting seat and a support disc, the mounting seat is rotatably mounted on the azimuth turntable around the vertical direction extending pivot, each support disc can support and position the chassis or frame part of the test vehicle, a support positioning device is further arranged, and the support positioning device can stop and position the movable support rotated to any angle.

[0006] As a further improvement of the utility model, the azimuth turntable is provided with a linear slide rail extending along the radial direction of the azimuth turntable, and a translation table is further arranged, the translation table is linearly slidably mounted on the linear slide rail, and the translation table can be stop positioned at any position of the linear slide rail, and the mounting seat of each movable support is mounted on the translation table.

[0007] As a further improvement of the utility model, a dovetail-shaped sliding groove is formed on the linear slide rail, a linear precision sliding block mechanism is slidably mounted in the sliding groove, and the translation table is fixedly mounted on the linear precision sliding block mechanism.

[0008] As a further improvement of the utility model, the vehicle support positioning device comprises at least one long slot-shaped tire fixing position arranged on the azimuth turntable, and at least two wheels of the test vehicle can be stop positioned in the tire fixing position, and a plurality of tire fixing positions are symmetrically arranged on the two sides of the linear slide rail.

[0009] As a further improvement of the utility model, the azimuth turntable comprises a turntable azimuth pivot and a cylindrical platform for supporting the vehicle, the turntable azimuth pivot is coaxially fixedly mounted below the cylindrical platform, a pivot hole is arranged at the upper end of the lifting column, an azimuth bearing is mounted in the pivot hole, and the turntable azimuth pivot of the azimuth turntable is mounted in the azimuth bearing.

[0010] As a further improvement of the utility model, the rotary drive device comprises a first servo motor, a first worm gear reducer, a transmission gear and a gear ring, the gear ring is coaxially fixedly mounted on the lower end surface of the turntable azimuth pivot, the first servo motor and the first worm gear reducer are fixedly mounted in the pivot hole of the lifting column, the power output shaft of the first servo motor is connected with the power input shaft of the first worm gear reducer, the power output end of the first worm gear reducer is in meshing transmission with the inner teeth of the gear ring through the transmission gear, and the control system controls the start-stop and steering of the first servo motor.

[0011] As a further improvement of the utility model, the support column is a sleeve structure, the lower end of the lifting column can be slidably inserted into the support column, at least two screw holes extending along the axial direction are arranged on the inner side of the lower end of the lifting column, a screw rod support plate is fixedly arranged in the support column, the lifting driving device comprises a second servo motor, a second worm and gear reducer, a synchronous transmission mechanism and a transmission screw rod, the second servo motor and the second worm and gear reducer are fixedly installed on the screw rod support plate, at least two transmission screw rods are axially fixed and can be rotated in the circumferential direction and are installed on the screw rod support plate, each transmission screw rod is movably screwed with the screw hole in the lower end of the lifting column, the power output shaft of the second servo motor is connected with the power input shaft of the second worm and gear reducer, the power output end of the second worm and gear reducer drives each screw rod to synchronously rotate through the synchronous transmission mechanism, and the control system controls the start-stop and steering of the second servo motor.

[0012] As a further improvement of the utility model, the screw rod support plate in the support column is coaxially fixedly installed with a guide column, the inner side of the lower end of the lifting column is provided with a guide hole coaxial with the lifting column, the guide column is slidably inserted into the guide hole, the three screw holes are uniformly distributed on the periphery of the guide hole, three transmission screw rods are movably screwed with the three screw holes respectively, and the synchronous transmission mechanism comprises a synchronous wheel and a synchronous belt.

[0013] As a further improvement of the utility model, the support column in the cylindrical shape is made of metal material, and the outer side of the support column is covered with a wave-absorbing material.

[0014] The vehicle support positioning device of the utility model can flexibly adapt to vehicle models with different vehicle lengths and widths, ensure stable support under various vehicle body configurations, thereby guaranteeing high precision and consistency in the test process, the vehicle support positioning device is based on a very simple and effective movable support, linear slide rail design structure, introduces a convenient mechanical adjustment mechanism and a high-precision positioning system, effectively solves the test error caused by antenna eccentricity in the whole vehicle antenna test, and can also improve the stability and reliability of the test process. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of the utility model;

[0016] Figure 2 It is a front view of the utility model;

[0017] Figure 3 The movable support is adjusted to the first scene schematic view of the utility model;

[0018] Figure 4 The movable support is adjusted to the second scene schematic view of the utility model;

[0019] Figure 5 The movable support is adjusted to the third scene schematic view of the utility model;

[0020] Figure 6 The state diagram of the utility model for positioning the vehicle;

[0021] Figure 7 The utility model's lifting drive arrangement and rotating drive arrangement perspective view;

[0022] Figure 8 The Figure 7 A part enlarged view;

[0023] Figure 9 The Figure 7 B part enlarged view. Specific implementation

[0024] Embodiment: a base support mechanism for whole vehicle OTA test, including azimuth turntable 1, support column 2, lifting column 3, lifting drive arrangement, rotating drive arrangement, wave absorbing material and control system, the lifting column 3 can be installed on support column 2 and be lifted, azimuth turntable 1 can be installed on the upper end of lifting column 3 and be rotated, lifting drive arrangement and rotating drive arrangement drive lifting column 3 lifting and azimuth turntable 1 rotation respectively, control system controls lifting drive arrangement and rotating drive arrangement operation, the wave absorbing material is covered in the metal parts outside that the support column 2, lifting column 3, azimuth turntable 1, vehicle support positioning device, lifting drive arrangement and rotating drive arrangement are exposed outside, still be equipped with the vehicle support positioning device that can adjust support position on horizontal plane on azimuth turntable 1, the vehicle support positioning device can be adaptively adjusted according to the size of measured vehicle 4 and antenna position realizes the fixed positioning and position adjustment of measured vehicle 4.

[0025] When testing, the mechanism needs to be set in the electromagnetic wave darkroom to ensure the signal isolation and accuracy of the test environment. Then, the vehicle support positioning device is adjusted according to the length and width of the vehicle 4 to be tested and the antenna position on the vehicle 4 to be tested, and then the vehicle is positioned by the vehicle support positioning device. After positioning, the antenna on the vehicle 4 to be tested is just in the test center. The design can flexibly adjust the support position of the vehicle support positioning device, so as to accept vehicles of different lengths and widths for testing, and can also adjust the position of the vehicle on the azimuth turntable 1, so that the antenna on the vehicle is just in the test center. During the test, the mechanism can perfectly adapt to vehicles of different lengths and widths, and effectively solve the eccentricity problem in the whole vehicle antenna test, ensuring the stability and accuracy of the test. The mechanism also coats the exposed metal parts with wave-absorbing material. The wave-absorbing material can receive electromagnetic waves directed to the mechanism, effectively optimizing the influence of the metal material of the mechanism on signal reflection, thereby reducing the interference with the vehicle test signal.

[0026] The vehicle support positioning device also includes a plurality of movable supports 5, the two ends of the movable supports 5 in the length direction are respectively provided with mounting seats 51 and support discs 52, the mounting seats 51 can be mounted on the azimuth turntable 1 by rotating around the vertical direction extending rotating shaft, each support disc 52 can support and position the chassis or frame part of the test vehicle, and a support positioning device is also provided, which can stop and position the movable support 5 rotated to any angle. The four movable supports 5 that can rotate 360 degrees control the position of the support disc 52 by free rotation, thereby accurately increasing or decreasing the support width. The design can flexibly adjust the position of the support disc 52, thereby accepting vehicles of different lengths and widths. The rotation of the movable support 5 can be manually adjusted by workers or electrically adjusted by a motor. For example, after inputting the length, width and antenna position parameters of the vehicle 4 to be tested (the corresponding vehicle parameters can also be input in advance according to different vehicle models, and during testing, only the vehicle model needs to be input), the control system can automatically adjust the rotation angle of the movable support 5. The length adjustment and width adjustment method is simple and fast, has strong flexibility, low cost and strong practicality. At the same time, during the test, the vehicle support positioning device can perfectly adapt to vehicles of different lengths and widths, thereby solving the eccentricity problem in the whole vehicle antenna test, ensuring the stability and accuracy of the test.

[0027] The azimuth turntable 1 is provided with a linear slide rail 6 extending radially along the azimuth turntable 1, and is also provided with a translation table 7, which is linearly slidably mounted on the linear slide rail 6 and can be fixedly positioned at any position of the linear slide rail 6, and the mounting seat 51 of each movable support 5 is mounted on the translation table 7. The front and rear positions of the vehicle can be adjusted by sliding the translation table 7, so as to further adapt to the case that the antenna position deviation of the vehicle of different lengths is large, further avoid the eccentricity problem in the antenna test of the whole vehicle, and ensure the test stability and test precision. The design of the linear slide rail 6 and the translation table 7 can also make the translation table 7 accurately and arbitrarily slide to any position, double the accommodation length of the supporting mechanism, and is beneficial to the miniaturization design of the whole mechanism and saves space.

[0028] The linear slide rail 6 is formed with a dovetail-shaped sliding groove, and a linear precision sliding block mechanism is slidably mounted in the sliding groove. The translation table 7 is fixedly mounted on the linear precision sliding block mechanism. The translation table 7 uses an embedded sliding mechanism. A rectangular platform-shaped linear slide rail 6 with a sliding groove design is fixed at the middle position of the azimuth turntable 1. The translation table 7 is embedded in the sliding groove of the linear slide rail 6 and can be stretched out of the vehicle length adjustment track through the sliding groove of the linear slide rail 6. Meanwhile, a guide positioning adjustment mechanism is adopted inside the rectangular slide rail. Through a series of mechanical connecting components (sliding block, bolt and precision positioning pin), the stability and accuracy of the vehicle under different length configurations are ensured. This structure can flexibly expand to adapt to the test requirements of different vehicle models and has high adjustment accuracy and repeatability. The stretching and sliding of the translation table 7 can be manually pulled by workers or automatically controlled by a motor-driven screw nut mechanism. When the translation table 7 slides to the accurate position, the control system locks the motor, and the translation table 7 can be fixed on the linear slide rail 6. For the manual pulling structure, the translation table 7 can be locked by a locking positioning mechanism after being moved to the position.

[0029] The vehicle supporting and positioning device comprises at least one long slot-shaped tire fixing position 8 arranged on the azimuth turntable 1. At least two wheels of the vehicle in the test can be fixedly positioned in the tire fixing position 8. A plurality of tire fixing positions 8 are symmetrically arranged on both sides of the linear slide rail 6. Preferably, one wheel fixing position is arranged on each side of the azimuth turntable 1 for fixing the position of a large vehicle with a large width. The fixed and adjustable vehicle positioning mechanisms are combined to be more flexible and convenient. When the width of the vehicle is not greater than the width of the translation table 7, the vehicle can be fixed based on the rotation of the four movable supports 5. When the width of the vehicle is greater than the width of the translation table 7, one side of the tire of the vehicle can be clamped into the tire fixing position 8, and the position of the translation table 7 is adjusted, and then the other side of the vehicle is fixed again through the corresponding two movable supports 5. This design is convenient to accommodate and can ensure the freedom of space with a small material size.

[0030] The azimuth turntable 1 comprises a turntable azimuth shaft coaxially fixedly installed below the cylindrical platform for supporting the vehicle, and a shaft hole is arranged at the upper end of the lifting column 3, an azimuth bearing 9 is arranged in the shaft hole, and the turntable azimuth shaft of the azimuth turntable 1 is arranged in the azimuth bearing 9. The turntable azimuth shaft can control the cylindrical turntable to rotate during testing, so as to accurately adjust the azimuth angle of the vehicle, and the azimuth bearing 9 is preferably a Luoyang rotating platform bearing YRT850.

[0031] The rotating driving device comprises a first servo motor 10, a first worm gear reducer 11, a transmission gear 12 and a gear ring 13, the gear ring 13 is coaxially fixedly installed on the lower end surface of the turntable azimuth shaft, the first servo motor 10 and the first worm gear reducer 11 are fixedly installed in the shaft hole of the lifting column 3, the power output shaft of the first servo motor 10 is connected with the power input shaft of the first worm gear reducer 11, the power output end of the first worm gear reducer 11 is in meshing transmission with the inner teeth of the gear ring 13 through the transmission gear 12, and the control system controls the start-stop and steering of the first servo motor 10. The position of the vehicle is controlled by controlling the start-stop, steering and rotation angle of the servo motor, and the servo motor can be uniformly controlled by the control software. The strict mechanical control design makes the test process very simple and convenient by the control software in the control system, further reduces the error caused by the test, and increases the reliability of the experimental results.

[0032] The support column 2 has a sleeve structure, the lower end of the lifting column 3 is slidably inserted into the support column 2, at least two screw holes extending along the axial direction are arranged on the inner side of the lower end of the lifting column 3, a screw rod support plate 14 is fixedly arranged in the support column 2, the lifting driving device comprises a second servo motor 15, a second worm gear reducer 16, a synchronous transmission mechanism and a transmission screw rod 17, the second servo motor 15 and the second worm gear reducer 16 are fixedly installed on the screw rod support plate 14, at least two transmission screw rods 17 are axially fixed and circumferentially rotatable on the screw rod support plate 14, each transmission screw rod 17 is movably screwed with the screw hole in the lower end of the lifting column 3 in one-to-one correspondence, the power output shaft of the second servo motor 15 is connected with the power input shaft of the second worm gear reducer 16, the power output end of the second worm gear reducer 16 drives each screw rod to synchronously rotate through the synchronous transmission mechanism, and the control system controls the start-stop and steering of the second servo motor 15. The plurality of screw rods are synchronously rotated by the second worm reducer through the synchronous transmission mechanism.

[0033] The guide column is coaxially and fixedly installed on the screw rod support plate 14 in the support column 2, the lower end of the lifting column 3 is provided with a guide hole coaxial with the lifting column 3, the guide column is slidably inserted into the guide hole, three screw holes are uniformly distributed on the periphery of the guide hole, three transmission screw rods 17 are movably screwed with the three screw holes respectively, the synchronous transmission mechanism comprises a synchronous wheel 18 and a synchronous belt 19, the synchronous wheel 18 is coaxially and fixedly connected with each transmission screw rod 17, and the synchronous belt 19 is sleeved outside each synchronous wheel 18. The lifting drive is a triangular structure composed of three screw rods, and the stability of the lifting process can be easily maintained due to the reliability of the triangular structure. A synchronous belt 19 is used as a synchronous device for positioning, and then the three screw rods are controlled to jointly support the upper lifting column 3 to ascend or descend. This design makes the base support mechanism have good stability during the ascending or descending process.

[0034] The support column 2 is cylindrical and is made of metal material, and the outer side of the support column 2 is covered with a wave-absorbing material. The support column 2 made of metal material can greatly provide the stability of the support mechanism and is firm and durable.

[0035] When performing the whole vehicle OTA test, the control software of the control system is used to control the first servo motor 10 and the second servo motor 15 to drive the lifting column 3 and the azimuth turntable 1, the circular azimuth turntable 1 is first lowered to a suitable height, and the translation table 7 is slid to an initial position, so that the translation table 7 is completely slid into the linear slide rail 6. Then, based on the length of the tested vehicle, the position of the translation table 7 is selectively controlled to slide, so that the distance length of the four movable supports 5 is consistent with the length of the tested vehicle. When the length of the tested vehicle is less than the length of the translation table 7, the translation table 7 is controlled to slide inward, and the sliding distance is that the length of the translation table 7 is higher than the length of the tested vehicle; when the length of the tested vehicle is equal to the length of the translation table 7, no adjustment is made; when the length of the tested vehicle is greater than the length of the translation table 7, the translation table 7 is controlled to slide outward, and the sliding distance is that the length of the translation table 7 is lower than the length of the tested vehicle. At the same time, based on the width of the tested vehicle, the support disc 52 on the movable support 5 is adjusted to the corresponding position, that is, when the width of the tested vehicle is greater than the sum of the length of the movable support 5 and the width of the translation table 7, the movable support 5 is adjusted to the first scenario as shown in Figure 3 When the width of the tested vehicle is greater than the length of the movable support 5 but less than the sum of the length of the movable support 5 and the width of the translation table 7, the movable support 5 is adjusted to the second scenario as shown in Figure 4 When the width of the tested vehicle is less than the width of the translation table 7, the movable support 5 is adjusted to the third scenario as shown in Figure 5 After that, the vehicle is driven into the microwave shielding darkroom, and the tested vehicle is placed on the translation table 7 by using an elevator or a slide, and the vehicle is fixed by the movable support 5.

[0036] At the beginning of the test, the lifting column 3 is controlled again to raise or lower the azimuth turntable 1 to the corresponding height. After the azimuth turntable 1 is set to the degree, the second servo motor 15 is turned off. Then, based on the test conditions and requirements, the first servo motor 10 is selectively controlled to drive the azimuth turntable 1 to rotate. When the probe rotation test or the automobile non-azimuth angle test is performed, the second servo motor 15 is locked, the azimuth turntable 1 remains in the closed state of the stop, and the test process is completed in the normal flow. When the automobile azimuth test is required and the automobile direction needs to be rotated, the second servo motor 15 is turned on, and the azimuth turntable 1 is controlled to rotate in the specified direction.

[0037] During the entire test process, the tested automobile remains unchanged in the position of the azimuth turntable 1. At the same time, the movable support 5 is fixed based on the gravity of the automobile, so it is required to ensure that the movable support 5 does not deflect during the test. In addition, based on different test environments, the length of the translation table 7 can also be less than the length of the slide rail.

Claims

1. A base support mechanism for whole vehicle OTA test, comprising an azimuth turntable (1), a support column (2), a lifting column (3), a lifting driving device, a rotating driving device, a wave-absorbing material and a control system, the lifting column is installed on the support column and can be lifted, the azimuth turntable is installed on the upper end of the lifting column and can be rotated, the lifting driving device and the rotating driving device respectively drive the lifting column to lift and the azimuth turntable to rotate, the control system controls the operation of the lifting driving device and the rotating driving device, and the wave-absorbing material is coated outside the metal parts exposed outside the support column, the lifting column, the azimuth turntable, the vehicle support positioning device, the lifting driving device and the rotating driving device, characterized in that: The azimuth turntable is further provided with a vehicle support positioning device capable of adjusting the support position in a horizontal plane, which can be adaptively adjusted according to the measured vehicle size and the antenna position to realize the fixed positioning and position adjustment of the measured vehicle (4).

2. The base support mechanism for whole vehicle OTA test according to claim 1, characterized in that: The vehicle support positioning device further comprises a plurality of movable supports (5), the two ends of the length direction of the movable support are respectively provided with a mounting seat (51) and a support disc (52), the mounting seat is rotatably mounted on the azimuth turntable about the vertical extension shaft, each support disc can support and position the chassis or frame part of the test vehicle, and a support positioning device is further arranged, which can stop and position the movable support rotated to any angle.

3. The base support mechanism for whole vehicle OTA testing of claim 2, characterized in that: The azimuth turntable is further provided with a linear slide rail (6) extending in the radial direction of the azimuth turntable, and a translation table (7) is further arranged, which is linearly slidably mounted on the linear slide rail and can be stop-positioned at any position of the linear slide rail, and the mounting seat of each movable support is mounted on the translation table.

4. The base support mechanism for whole vehicle OTA testing of claim 3, characterized in that: The linear slide rail is formed with a dovetail-shaped sliding groove, and a linear precision sliding block mechanism is slidably mounted in the sliding groove, and the translation table is fixedly mounted on the linear precision sliding block mechanism.

5. The base support mechanism for whole vehicle OTA testing of claim 3, characterized in that: The vehicle support positioning device comprises at least one long slot-shaped tire fixing position (8) arranged on the azimuth turntable, at least two wheels of the test vehicle can be stop-positioned in the tire fixing position, and a plurality of tire fixing positions are symmetrically arranged on both sides of the linear slide rail.

6. The base support mechanism for whole vehicle OTA testing of claim 1, characterized in that: The azimuth turntable comprises a turntable azimuth rotating shaft and a cylindrical platform for supporting the vehicle, the turntable azimuth rotating shaft is coaxially fixedly mounted below the cylindrical platform, the upper end of the lifting column is provided with a rotating shaft hole, an azimuth bearing (9) is mounted in the rotating shaft hole, and the turntable azimuth rotating shaft of the azimuth turntable is mounted in the azimuth bearing.

7. The base support mechanism for whole vehicle OTA testing of claim 6, characterized in that: The rotating drive device comprises a first servo motor (10), a first worm gear reducer (11), a transmission gear (12) and a gear ring (13), the gear ring is coaxially fixedly mounted on the lower end surface of the turntable azimuth rotating shaft, the first servo motor and the first worm gear reducer are fixedly mounted in the rotating shaft hole of the lifting column, the power output shaft of the first servo motor is connected with the power input shaft of the first worm gear reducer, the power output end of the first worm gear reducer is in meshing transmission with the inner teeth of the gear ring through the transmission gear, and the control system controls the start-stop and steering of the first servo motor.

8. The base support mechanism for whole vehicle OTA testing of claim 1, characterized in that: The support column is a sleeve structure, the lower end of the lifting column can slide up and down in the support column, the inner side of the lower end of the lifting column is provided with at least two screw holes extending along the axial direction, a screw rod support plate (14) is fixedly arranged in the support column, the lifting driving device comprises a second servo motor (15), a second worm gear reducer (16), a synchronous transmission mechanism and a transmission screw rod (17), the second servo motor and the second worm gear reducer are fixedly installed on the screw rod support plate, at least two transmission screw rods are axially fixed and can rotate in the circumferential direction and are installed on the screw rod support plate, each transmission screw rod is movably screwed with the screw hole in the lower end of the lifting column, the power output shaft of the second servo motor is connected with the power input shaft of the second worm gear reducer, the power output end of the second worm gear reducer drives each screw rod to synchronously rotate through the synchronous transmission mechanism, and the control system controls the start-stop and steering of the second servo motor.

9. The base support mechanism for whole vehicle OTA testing of claim 8, characterized in that: A guide column is coaxially and fixedly installed on the screw rod support plate in the support column, the inner side of the lower end of the lifting column is provided with a guide hole coaxial with the lifting column, the guide column is slidably inserted into the guide hole, the three screw holes are uniformly distributed on the periphery of the guide hole, three transmission screw rods are movably screwed with the three screw holes respectively, the synchronous transmission mechanism comprises a synchronous wheel (18) and a synchronous belt (19), the synchronous wheel is coaxially and fixedly connected with each transmission screw rod, and the synchronous belt is sleeved outside each synchronous wheel.

10. The base support mechanism for whole vehicle OTA testing of claim 1, characterized in that: The cylindrical support column is made of metal material, and the outer side of the support column is covered with a wave-absorbing material.

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