Base assembly and vehicle measuring system

By introducing first and second drive components into the base assembly, combined with a motor and screw system, precise position adjustment of the support plate is achieved, solving the problem of column position control in large vehicle measurement systems and improving adjustment accuracy and stability.

CN223470668UActive Publication Date: 2025-10-24SHENZHEN SMARTSAFE TECH CO LTD
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Patent Information

Application Number
CN202422676909.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-01
Publication Date
2025-10-24
Estimated Expiration
2034-11-01

AI Technical Summary

Technical Problem

Existing base components are difficult to adapt to the precision of column translation fine adjustment, especially in large vehicle measurement systems, where users have difficulty controlling the column position, and the thrust can easily affect the stability of the base.

Method used

The first drive assembly and the second drive assembly are used to drive the first plate and the second plate to move in different directions, respectively. Combined with the motor and screw system, the precise position adjustment of the support plate is realized. The position control accuracy is ensured by the cooperation of the sensing element and the sensor.

Benefits of technology

It enables precise movement of the support plate in the horizontal plane, reduces the probability of column tilting and tipping, improves the accuracy and efficiency of column position adjustment, and ensures the stability of the vehicle measurement system.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223470668U_ABST
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Abstract

The utility model relates to the technical field of calibration equipment, and provides a base assembly and a vehicle measuring system, and the base assembly comprises a supporting disc, a first plate body, a first driving assembly, a second plate body, a second driving assembly and a seat body. The first driving assembly is used for driving the first plate body to move in the first direction. The second plate body is connected to the fixing part of the first driving assembly, and the first plate body is slidably connected to the second plate body; the second driving assembly is used for driving the second plate body to move in the second direction; the seat body is provided with a containing cavity, the fixing part of the second driving assembly is arranged on the bottom body, and the second plate body is slidably connected to the seat body. According to the base assembly, a user does not need to push the stand column during adjustment, the probability that a vehicle measuring system is unstable or topples over due to the fact that the stand column inclines under thrust is reduced, the stand column can be conveniently and horizontally moved, and the control precision and the adjustment efficiency of the translation position of the stand column can be improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to calibration equipment technical field especially provides a base subassembly and vehicle measuring system with the base subassembly. BACKGROUND

[0002] When calibrating a vehicle, the ADAS (Advanced Driver Assistant System) calibration device usually needs to lock the base position first, and then push the stand column to move horizontally and rotate, so as to adjust the horizontal position and angle of the target mounted on the stand column, so that the target can face the vehicle directly.

[0003] However, for large vehicles, the weight and size of the vehicle measuring system after unfolding are large, the base adopts a frame structure to reduce the weight and facilitate the user to push the stand column to move horizontally, but it is difficult for the user to control the position accuracy of the stand column translation, and the pushing force easily affects the stability of the base, which is inconvenient for the user to operate. UTILITY MODEL CONTENTS

[0004] The utility model discloses a base subassembly and vehicle measuring system, which aims to solve the problem that the existing base subassembly is difficult to adapt to the fine adjustment accuracy of the horizontal movement of the stand column.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] In a first aspect, the application provides a base subassembly, comprising:

[0007] A support disc is used to connect the stand column;

[0008] A first plate body is connected to the support disc;

[0009] A first drive assembly is used to drive the first plate body to move in a first direction, and the movable part of the first drive assembly is connected to the first plate body;

[0010] A second plate body is connected to the fixed part of the first drive assembly, and the first plate body is slidingly connected to the second plate body;

[0011] A second drive assembly is used to drive the second plate body to move in a second direction, and the movable part of the second drive assembly is connected to the second plate body, and the second direction and the first direction are arranged at an angle;

[0012] The seat body has a containing cavity, the support disc, the first plate body, the first driving assembly, the second plate body and the second driving assembly are sequentially arranged from top to bottom, the fixed part of the second driving assembly is arranged on the seat body, and the second plate body is slidingly connected to the seat body.

[0013] The base assembly provided by the utility model has the advantages that the first driving assembly and the second driving assembly are adopted, the support disc can be controlled to move in a horizontal plane, the horizontal position of the support disc is adjusted, the target can be directly opposite to the vehicle, and the calibration requirement is met.

[0014] In some embodiments, the first driving assembly comprises a first nut connected with the first plate body, a first screw rod in transmission connection with the first nut, and a first motor for driving the first screw rod to rotate, the first screw rod is rotationally connected to the second plate body, the first screw rod and the first plate body are arranged side by side along the first direction, the first motor is mounted on the second plate body, and the first motor is connected with the first screw rod.

[0015] By adopting the above technical scheme, the first motor is used to drive the first screw rod to rotate around the shaft, so as to drive the first nut to move horizontally on the first screw rod along the first direction, and finally drive the first plate body to relatively slide with respect to the second plate body.

[0016] In some embodiments, the second plate body is provided with a first guide rail extending along the first direction, and the first plate body is provided with a first sliding block slidingly connected to the first guide rail.

[0017] By adopting the above technical scheme, the relative sliding relationship between the first sliding block and the first guide rail is used to realize the relative sliding between the first plate body and the second plate body.

[0018] In some embodiments, the first nut is provided with a first sensing part, and the second plate body is provided with a first sensing part in inductive cooperation with the first sensing part.

[0019] Alternatively, the base assembly comprises a first support arranged on the second plate body, a first sliding seat slidingly connected to the first support, and a first locking part for locking the first sliding seat on the first support, the first sensing part is arranged on the first sliding seat, and the first support extends along the first direction.

[0020] By adopting the technical scheme, the mutual induction cooperation between the first induction member and the first sensing member is utilized to obtain the relative position of the first nut on the first screw rod, so that the requirement of accurate control is achieved.

[0021] In some embodiments, the second driving assembly comprises a second nut connected with the second plate body, a second screw rod in driving connection with the second nut, and a second motor for driving the second screw rod to rotate, the second screw rod is rotatably installed on the seat body, and the second screw rod and the second plate body are arranged side by side along the second direction, the second motor is installed on the seat body, and the second motor is connected with the second screw rod.

[0022] By adopting the technical scheme, the second motor drives the second screw rod to rotate around the shaft, thereby driving the second nut to move along the second direction on the second screw rod, and finally driving the second plate body to relatively slide with respect to the seat body.

[0023] In some embodiments, the seat body is provided with a second guide rail extending along the second direction, and the second plate body is provided with a second sliding block, the second sliding block being in sliding connection with the second guide rail.

[0024] By adopting the technical scheme, the relative sliding relationship between the second sliding block and the second guide rail is utilized to realize the relative sliding between the second plate body and the seat body.

[0025] In some embodiments, the second nut is provided with a second induction member, and the seat body is provided with a second sensing member in inductive cooperation with the second induction member.

[0026] Alternatively, the base assembly comprises a second support provided on the seat body, a second sliding block in sliding connection with the second support, and a second locking member for locking the second sliding block on the second support, the second sensing member is provided on the second sliding block, and the second support extends along the second direction.

[0027] By adopting the technical scheme, the mutual induction cooperation between the second induction member and the second sensing member is utilized to obtain the relative position of the second nut on the second screw rod, so that the requirement of accurate control is achieved, and the second sensing member can slide with the second sliding block on the second support, and the second sliding block can be fixed by the second locking member to fix the position of the second sliding block on the second support.

[0028] In some embodiments, the seat body comprises a lower bottom plate, a first upper cover arranged on the lower bottom plate, and a second upper cover, the first upper cover and the lower bottom plate form the accommodating cavity, the first upper cover is provided with an opening for the support disc to extend out, and the second upper cover is connected to the support disc and seals the opening.

[0029] By adopting the above technical scheme, the support disc moves horizontally with the first plate body in the range of the opening of the first upper cover, and the second upper cover can seal the opening, thereby achieving a certain waterproof and dustproof effect.

[0030] In some embodiments, the second upper cover comprises two sub-covers, and the two sub-covers are arranged on the circumferential wall of the support disc, and each sub-cover is provided with a flange for connecting with the support disc.

[0031] By adopting the above technical scheme, the flange of each sub-cover can be connected with the circumferential wall of the support disc through a fastener, so that each sub-cover moves horizontally with the support disc and seals the opening.

[0032] In a second aspect, the embodiment of the present application provides a vehicle measurement system comprising the base assembly as described above.

[0033] The vehicle measurement system provided by the present application can realize automatic adjustment of the horizontal position of the stand column on the basis of the above base assembly, reduce the instability of the vehicle measurement system caused by the external force pushing the stand column, and improve the position adjustment precision of the stand column. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 The structural schematic diagram of the base assembly provided by the embodiment of the present application is shown in the figure.

[0036] Figure 2 The exploded view of the base assembly provided by the embodiment of the present application is shown in the figure.

[0037] Figure 3 The structural schematic diagram of the support disc, the first plate body, the first driving assembly, the second plate body and the second driving assembly of the base assembly provided by the embodiment of the present application is shown in the figure.

[0038] Figure 4The explosion map of the support disc, the first plate body, the first driving assembly, the second plate body and the second driving assembly of the base assembly is provided for the embodiments of the utility model.

[0039] In the drawings, various reference signs refer to:

[0040] 100, base assembly;

[0041] 10, support disc;

[0042] 20, first plate body; 21, first guide rail; 22, first sliding block;

[0043] 30, first driving assembly; 31, first nut; 32, first screw; 33, first motor; 34, first induction piece; 35, first sensing piece; 36, first support; 37, first sliding seat; 38, first locking piece;

[0044] 40, second plate body; 41, second guide rail; 42, second sliding block;

[0045] 50, second driving assembly; 51, second nut; 52, second screw; 53, second motor; 54, second induction piece; 55, second sensing piece; 56, second support; 57, second sliding seat; 58, second locking piece;

[0046] 60, seat body; 61, lower bottom plate; 62, first upper cover; 63, second upper cover; 62a, opening; 631, sub-cover; 632, flange;

[0047] X, first direction; Y, second direction DETAILED DESCRIPTION

[0048] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0049] In the description of the utility model, it is understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0050] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In a first aspect, referring to Figures 1 to 3 The base assembly 100 provided by the embodiments of the present application comprises a support disc 10, a first plate body 20, a first driving assembly 30, a second plate body 40, a second driving assembly 50 and a seat body 60.

[0053] It can be understood that the support disc 10 is mainly used for connecting with the stand and moving synchronously with the stand. The first plate body 20 is used for supporting the support disc 10, the first driving assembly 30 is used for providing power for the sliding of the first plate body 20 relative to the second plate body 40, the second driving assembly 50 is used for providing power for the sliding of the second plate body 40 relative to the seat body 60, and the seat body 60 provides corresponding bearing and support for the above-mentioned components.

[0054] The support disc 10 is used for connecting with the stand; the first plate body 20 is connected to the support disc 10; the first driving assembly 30 is used for driving the first plate body 20 to move along the first direction X, and the movable part of the first driving assembly 30 is connected to the first plate body 20; the second plate body 40 is connected to the fixed part of the first driving assembly 30, and the first plate body 20 is slidingly connected to the second plate body 40; the second driving assembly 50 is used for driving the second plate body 40 to move along the second direction Y, and the movable part of the second driving assembly 50 is connected to the second plate body 40, and the second direction Y and the first direction X are arranged at an angle; the seat body 60 has a receiving cavity, and the support disc 10, the first plate body 20, the first driving assembly 30, the second plate body 40 and the second driving assembly 50 are sequentially arranged from top to bottom, the fixed part of the second driving assembly 50 is arranged on the seat body, and the second plate body 40 is slidingly connected to the seat body 60.

[0055] Here, the first direction X and the second direction Y can be the length and width directions of the seat body 60, for example, the first direction X is the length direction of the seat body 60, and the second direction Y is the width direction of the seat body 60, that is, the first direction X and the second direction Y are perpendicular to each other, of course, in other embodiments, the first direction X and the second direction Y can also be at other angles.

[0056] The base assembly 100 provided by the utility model can control the support disc 10 to move in a horizontal plane, adjust the horizontal position of the support disc 10, and make the target face the vehicle, so as to meet the calibration requirement. In this way, the user does not need to push the stand column during adjustment, the probability that the stand column is tilted due to the pushing force and causes the vehicle measurement system to be unstable or to fall is reduced, and the stand column is conveniently horizontally moved, which is beneficial to improving the control precision and adjustment efficiency of the position of the stand column.

[0057] Please refer to Figures 2 to 4 In some embodiments, the first driving assembly 30 comprises a first nut 31 connected with the first plate body 20, a first screw rod 32 in transmission connection with the first nut 31, and a first motor 33 for driving the first screw rod 32 to rotate, the first screw rod 32 is rotationally connected to the second plate body 40, the first screw rod 32 and the first plate body 20 are arranged side by side along the first direction X, the first motor 33 is installed on the second plate body 40, and the first motor 33 is connected with the first screw rod 32. In this way, the first motor 33 drives the first screw rod 32 to rotate, so that the first nut 31 drives the first plate body 20 to move along the first direction X, thereby realizing accurate adjustment of the position of the support disc 10 along the first direction X.

[0058] Optionally, the first plate body 20 is provided with a connecting arm, and the first nut 31 is connected with the connecting arm. The connecting arm connects the first nut 31 and the first plate body 20, which is beneficial to reducing the width of the first plate body 20 and increasing the movement range of the first plate body 20 along the first direction X.

[0059] In this way, the first motor 33 drives the first screw rod 32 to rotate around the shaft, thereby driving the first nut 31 to translate along the first direction X on the first screw rod 32, and finally driving the first plate body 20 to relatively slide relative to the second plate body 40.

[0060] Please refer to Figures 2 to 4 In some embodiments, the second plate body 40 is provided with a first guide rail 21 extending along the first direction X, and the first plate body 20 is provided with a first sliding block 22 in sliding connection with the first guide rail 21.

[0061] In this way, the relative sliding relationship between the first sliding block 22 and the first guide rail 21 is utilized to realize the relative sliding between the first plate body 20 and the second plate body 40.

[0062] Please refer to Figures 2 to 4 In some embodiments, the first nut 31 is provided with a first sensing member 35, and the second plate body 40 is provided with a first sensing member 36 which is in sensing cooperation with the first sensing member 35. Through the cooperation between the first sensing member 35 and the first sensing member 36, the position of the first plate body 20 and the support disc 10 moving along the first direction X can be detected, so as to accurately adjust the position of the support disc 10 along the first direction X.

[0063] Alternatively, the base assembly 100 comprises a first support 36 provided on the second plate body 40, a first sliding seat 37 slidingly connected to the first support 36, and a first locking member 38 for locking the first sliding seat 37 on the first support 36. The first sensing member 36 is provided on the first sliding seat 37, and the first support 36 extends along the first direction X. In this way, the positions of the first sensing members 35 can be conveniently adjusted, so as to adjust the moving range of the first plate body 20. Alternatively, the first locking member 38 can be a screw, and the locking and releasing of the first sliding seat 37 and the first support 36 can be realized by rotating the screw.

[0064] Alternatively, as shown in Figure 4 The number of the first sensing members 36 is three, two of which are respectively located at the two ends of the first support 36, and are used to limit the moving range of the first plate body 20; and one of which is located at the middle of the first support 36, and is used to limit the initial position of the first plate body 20.

[0065] In this way, the relative position of the first nut 31 on the first screw 32 is obtained through the mutual sensing cooperation between the first sensing member 35 and the first sensing member 36, so as to meet the requirement of accurate control. Meanwhile, the first sensing member 36 can slide with the first sliding seat 37 on the first support 36, and the first sliding seat 37 can also be fixed by the first locking member 38, so as to fix the position of the first sliding seat 37 on the first support 36.

[0066] Please refer to Figures 2 to 4 In some embodiments, the second driving assembly 50 comprises a second nut 51 connected to the second plate body 40, a second screw 52 in transmission connection with the second nut 51, and a second motor 53 for driving the second screw 52 to rotate. The second screw 52 is rotatably installed on the seat body, and the second screw 52 and the second plate body 40 are arranged side by side along the second direction Y. The second motor 53 is installed on the seat body 60, and the second motor 53 is connected to the second screw 52.

[0067] Similarly, the second screw 52 is driven by the second motor 53 to rotate around the shaft, thereby driving the second nut 51 to translate along the second direction Y on the second screw 52, and finally driving the second plate body 40 to relatively slide with respect to the seat body 60.

[0068] Please refer toFigures 2 to 4 In some embodiments, the seat body 60 is provided with a second guide rail 41 extending along the second direction Y, and the second plate body 40 is provided with a second sliding block 42 slidingly connected to the second guide rail 41.

[0069] Similarly, the relative sliding relationship between the second sliding block 42 and the second guide rail 41 is utilized to realize the relative sliding between the second plate body 40 and the seat body 60.

[0070] Please refer to Figures 2 to 4 In some embodiments, the second nut 51 is provided with a second sensing member 54, and the seat body 60 is provided with a second sensing member 55 inductively cooperating with the second sensing member 54. Through the cooperation between the second sensing member 54 and the second sensing member 55, the position of the second plate body and the support disc 10 moving along the second direction Y can be detected, so as to accurately adjust the position of the support disc 10 along the second direction Y.

[0071] Alternatively, the base assembly 100 comprises a second bracket 56 provided on the seat body 60, a second sliding seat 57 slidingly connected to the second bracket 56, and a second locking member 58 for locking the second sliding seat 57 on the second bracket 56, the second sensing member 55 is provided on the second sliding seat 57, and the second bracket 56 extends along the second direction Y. In this way, the positions of the second sensing members 55 can be conveniently adjusted to adjust the moving range of the second plate body 40. Alternatively, the second locking member 58 can be a screw, and the locking and releasing of the second sliding seat 57 and the second bracket 56 can be realized by rotating the screw.

[0072] Alternatively, as Figure 4 shown, the number of second sensing members 55 is three, two second sensing members 55 are respectively located at both ends of the second bracket 56 for limiting the moving range of the second plate body 40, and one second sensing member 55 is located at the middle of the second bracket 56 for limiting the initial position of the second plate body 40.

[0073] Similarly, the mutual inductive cooperation between the second sensing member 54 and the second sensing member 55 is utilized to obtain the relative position of the second nut 51 on the second screw 52, so as to meet the requirement of accurate control. Meanwhile, the second sensing member 55 can slide with the second sliding seat 57 on the second bracket 56, and the second sliding seat 57 can also be fixed by the second locking member 58 to fix the position of the second sliding seat 57 on the second bracket 56.

[0074] Please refer to Figure 1 and Figure 2In some embodiments, the base body 60 comprises a lower bottom plate 61, a first upper cover 62 arranged on the lower bottom plate 61, and a second upper cover 63, the first upper cover 62 and the lower bottom plate 61 form a containing cavity, the first upper cover 62 is provided with an opening 62a for the support disc 10 to extend out, and the second upper cover 63 is connected to the support disc 10 and seals the opening 62a.

[0075] It can be understood that the support disc 10 moves horizontally within the range of the opening 62a of the first upper cover 62, and the second upper cover 63 moves along with the support disc 10 during the horizontal movement of the support disc 10, so that the second upper cover 63 can seal the opening 62a and has a certain waterproof and dustproof effect.

[0076] Please refer to Figure 1 and Figure 2 In some embodiments, the second upper cover 63 comprises two sub-covers 631, and the two sub-covers 631 are arranged on the circumferential side wall of the support disc 10, and each sub-cover 631 is provided with a flange 632 for connecting with the support disc 10.

[0077] It can be understood that the flange 632 of each sub-cover 631 can be connected to the circumferential side wall of the support disc 10 through a fastener, so that each sub-cover 631 moves horizontally along with the support disc 10 and seals the opening 62a.

[0078] In a second aspect, the embodiments of the present application provide a vehicle measurement system, comprising the base assembly 100 as described above.

[0079] The vehicle measurement system provided by the present application can realize automatic adjustment of the horizontal position of the stand column on the basis of the above-mentioned base assembly 100, reduces the instability of the vehicle measurement system caused by the external force pushing the stand column, and is beneficial to improve the position adjustment precision of the stand column.

[0080] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A base assembly characterized by, The utility model relates to a support disc for connecting the stand, a first plate body connected to the support disc, a first drive assembly for driving the first plate body to move in a first direction, a movable part of the first drive assembly being connected to the first plate body, a second plate body connected to a fixed part of the first drive assembly, the first plate body being slidingly connected to the second plate body, a second drive assembly for driving the second plate body to move in a second direction, a movable part of the second drive assembly being connected to the second plate body, the second direction and the first direction being arranged at an angle, a seat body having a receiving cavity, the support disc, the first plate body, the first drive assembly, the second plate body and the second drive assembly being arranged in sequence from top to bottom, the fixed part of the second drive assembly being arranged on the seat body, and the second plate body being slidingly connected to the seat body. The first drive assembly comprises a first nut connected to the first plate body, a first screw in transmission connection with the first nut, and a first motor for driving the first screw to rotate, the first screw being rotatably connected to the second plate body, the first screw and the first plate body being arranged side by side in the first direction, the first motor being mounted on the second plate body, and the first motor being connected to the first screw. The second plate body is provided with a first guide rail extending in the first direction, and the first plate body is provided with a first sliding block slidingly connected to the first guide rail. The first nut is provided with a first sensing element, and the second plate body is provided with a first sensing element in inductive cooperation with the first sensing element. Alternatively, the base assembly comprises a first bracket arranged on the second plate body, a first sliding seat slidingly connected to the first bracket, and a first locking element for locking the first sliding seat to the first bracket, the first sensing element being arranged on the first sliding seat, and the first bracket extending in the first direction. The second drive assembly comprises a second nut connected to the second plate body, a second screw in transmission connection with the second nut, and a second motor for driving the second screw to rotate, the second screw being rotatably mounted on the seat body, the second screw and the second plate body being arranged side by side in the second direction, the second motor being mounted on the seat body, and the second motor being connected to the second screw. The seat body is provided with a second guide rail extending in the second direction, and the second plate body is provided with a second sliding block slidingly connected to the second guide rail.

2. The base assembly of claim 1, wherein: The second nut is provided with a second sensing element, and the seat body is provided with a second sensing element in inductive cooperation with the second sensing element.

3. The base assembly of claim 2, wherein: Alternatively, the base assembly comprises a second bracket arranged on the seat body, a second sliding seat slidingly connected to the second bracket, and a second locking element for locking the second sliding seat to the second bracket, the second sensing element being arranged on the second sliding seat, and the second bracket extending in the second direction.

4. The base assembly of claim 2, wherein: ​ ​ 5. The base assembly of claim 1, wherein: ​ 6. The base assembly of claim 5, wherein: ​ 7. The base assembly of claim 5, wherein: ​ ​ 8. The base assembly of any one of claims 1 to 7, wherein: The seat body comprises a lower bottom plate, a first upper cover arranged on the lower bottom plate, and a second upper cover, the first upper cover and the lower bottom plate form the accommodating cavity, the first upper cover is provided with an opening for the support disc to extend out, and the second upper cover is connected to the support disc and seals the opening.

9. The base assembly of claim 8, wherein: The second upper cover comprises two sub-covers, and the two sub-covers are arranged on the circumferential wall of the support disc, and each sub-cover is provided with a flange for connecting with the support disc.

10. A vehicle measurement system characterized by: A base assembly comprising any one of claims 1 to 9.