Whole vehicle in-loop test tested vehicle steering parameter calibrator

Abstract

The utility model discloses a whole vehicle in-the-loop test detected vehicle steering parameter calibrator comprising a steering assembly comprising a fixing plate, two clamping plates capable of clamping front wheels are connected on the fixing plate, a detection plate is fixedly connected on the fixing plate outside the clamping plates, and a detection fixed ball is fixed on the upper side of the detection plate; the detection assembly comprises an industrial camera, and the industrial camera is arranged above the detection fixed ball and is aligned with the detection fixed ball; according to the utility model, the steering assembly is fixedly connected to the front wheel, and the industrial camera collects the position of the detection fixed ball when the front wheel of the automobile steers, thereby facilitating the detection of subsequent steering parameters, and improving the measurement efficiency of the steering parameters of the detected automobile.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile auxiliary test equipment, in particular to a steering parameter calibrator for a tested vehicle in a whole vehicle-in-the-loop test. Background Art

[0002] Vehicle testing is a crucial step in the automotive R&D process, playing a key role in optimizing a vehicle's structure, performance, safety, and reliability. Currently, drum test benches are essential equipment for vehicle-in-the-loop (WL) testing. Drum test benches with front-wheel steering, which rotate according to the vehicle's wheel angle, can be used to test autonomous driving in smart cars, enjoying a wide range of applications. However, before conducting WL testing, the front wheel kingpin spacing and the ratio of the vehicle's front wheel angle to the steering wheel angle must be known in advance to adjust the front wheel drum spacing and set the relevant control parameters of the drum test bench. The wheel can only adhere to the drum at any angle if the drum's rotation center is equal to and coincides with the wheel's kingpin spacing, and the wheel's rotation center coincides with the drum's rotation center. If the drum's rotation center is not coaxial with the wheel's kingpin, steering can cause the vehicle under test to become unstable and even cause the tire to detach from the drum.

[0003] However, due to the wide variety of car brands and models, many parameters are core design parameters. Vehicle technical documentation is not publicly available, making them difficult to obtain and impossible to measure directly. Testers must perform measurements piecemeal, which is not only time-consuming but also inaccurate, leading to inaccurate test results. Therefore, there is an urgent need for auxiliary equipment that can facilitate the measurement of steering parameters of tested vehicles, freeing up testers and reducing the labor cost of the vehicle testing process. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or existing problems in the existing steering parameter testing, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a steering parameter calibrator for the vehicle under test for whole-vehicle in-the-loop testing. The present invention fixes the steering assembly to the front wheel, and uses an industrial camera to detect the position of the fixed ball when the front wheel of the car is turning, so as to facilitate the subsequent detection of steering parameters and improve the measurement efficiency of the steering parameters of the vehicle under test.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a vehicle-in-the-loop test steering parameter calibrator for a vehicle under test, comprising:

[0008] The steering assembly includes a fixed plate, on which are connected two clamping plates capable of clamping the front wheels. A detection plate is also fixedly connected to the fixed plate outside the clamping plates, and a detection ball is fixed on the upper side of the detection plate;

[0009] The detection component includes an industrial camera, which is arranged above the detection fixed ball and aimed at the detection fixed ball.

[0010] As a preferred solution for the steering parameter calibrator of the vehicle under test in the whole vehicle-in-the-loop test in the utility model, wherein: two guide rails are fixedly connected to the fixed plate, two movable plates are slidably connected to the two guide rails and move linearly toward or away from each other along the two guide rails at the same time, and the splint is fixedly connected to the bottom of the corresponding movable plate.

[0011] As a preferred solution for the steering parameter calibrator of the vehicle under test in the whole vehicle-in-the-loop test in the present invention, the central rotation of the fixed plate is connected to the handwheel shaft, the handwheel shaft is connected to the swing arm, the two ends of the swing arm are hinged with ball hinge rods, and the end of the ball hinge rod away from the swing arm is hinged to the corresponding movable plate.

[0012] As a preferred solution of the steering parameter calibrator of the vehicle under test in the whole vehicle-in-the-loop test in the present invention, wherein: the lower side of the movable plate is fixedly connected to a clamping plate bracket, and the clamping plate is fixedly connected to the clamping plate bracket.

[0013] As a preferred solution of the steering parameter calibrator of the vehicle under test for the whole vehicle-in-the-loop test in the present invention, wherein: the center of the fixed plate is fixedly connected to a cylindrical damping shaft, and the handwheel shaft is connected to the cylindrical damping shaft.

[0014] As a preferred solution of the steering parameter calibrator of the vehicle under test for the whole vehicle-in-the-loop test in the present invention, a hand wheel for convenient operation is connected to the upper side of the swing arm.

[0015] As a preferred solution for the steering parameter calibrator of the vehicle under test in the whole vehicle-in-the-loop test in the present invention, the handwheel is provided with an upper synchronous rotation hole, and the swing arm is provided with at least one lower synchronous rotation hole which is coaxial with the upper synchronous rotation hole.

[0016] As a preferred solution for the steering parameter calibrator of the vehicle under test in the whole vehicle-in-the-loop test of the utility model, wherein: the outer sides of the two guide rails are fixedly connected with a detection connecting plate, and the detection plate is fixedly connected to the upper side of the detection connecting plate.

[0017] Compared with the prior art, the present invention has the following technical effects: when in use, the fixed plate is placed horizontally on the top of the front wheel, the handwheel is relatively at the center position in the axial direction of the front wheel, the handwheel is turned forcefully to rotate the swing arm, and the swing arm drives the two ball hinge pull rods to swing, and the two ball hinge pull rods respectively drive the two corresponding movable plates to slide along the guide rail, and the rotation direction of the handwheel is adjusted to make the two ball hinge pull rods pull the two movable plates to move toward each other until the clamping plate clamps the front wheel, stop turning the handwheel, set the industrial camera above the detection fixed ball and align it with the detection fixed ball, the industrial camera identifies the detection fixed ball through image recognition, and realizes the angle ratio of the front wheel angle of the tested vehicle and the steering wheel; the utility model can be applied to the testing of vehicle steering parameters, and is particularly suitable for assisting in the testing of the angle ratio of the front wheel angle of the tested vehicle and the steering wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0019] Figure 1 It is a three-dimensional structural diagram of the steering assembly in the present utility model.

[0020] Figure 2 This is an exploded view of the steering assembly in the present invention.

[0021] Figure 3 This is a partial structural diagram of the utility model when it is installed on a vehicle.

[0022] Figure 4 This is the measurement principle diagram.

[0023] In the figure, 1 is a vehicle, 2 is a slider, 3 is an industrial camera, 4 is a camera bracket, 5 is a computer, 6 is a detection ball, 7 is a detection plate, 8 is a splint bracket, 9 is a guide rail, 10 is a moving plate, 11 is a ball hinge rod, 12 is a fixed plate, 13 is a cylindrical damping shaft, 14 is a handwheel shaft, 15 is a handwheel, 1501 is a plug-in part, 16 is a swing arm, 17 is a detection connecting plate, and 18 is a splint. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Example 1

[0028] Reference Figures 1 to 4 This embodiment provides a steering parameter calibrator for a vehicle under test in a vehicle-in-the-loop test, which can assist in measuring the ratio of the front wheel steering angle to the steering wheel steering angle of the vehicle under test.

[0029] A steering parameter calibrator for a vehicle under test in a whole vehicle-in-the-loop test comprises a steering assembly connected to the front wheels and a detection assembly arranged on a hood.

[0030] The steering assembly includes a fixed plate 12, to which are connected two clamping plates 18 capable of clamping the front wheels. A detection plate 7 is also fixedly connected to the fixed plate 12 outside the clamping plate 18, and a detection fixed ball 6 is fixedly connected to the upper side of the detection plate 7. Two guide rails 9 are fixedly connected to the fixed plate 12, and two sliders 2 are slidably connected to the two guide rails 9, which move linearly toward or away from each other along the two guide rails 9 at the same time. A moving plate 10 is fixedly connected to the upper side of the slider 2, and a clamping plate bracket 8 is fixedly connected to the lower side of the moving plate 10. The clamping plate 18 is fixedly connected to the clamping plate bracket 8. The two guide rails 9 are respectively fixedly connected to detection connecting plates 17 at both ends in the length direction, and the detection plate 7 is fixedly connected to the upper side of the detection connecting plate 17.

[0031] The detection component includes a camera bracket 4, to which an industrial camera 3 is fixedly connected. The industrial camera 3 is electrically connected to a computer 5. The computer 5 receives the image signal collected by the industrial camera 3. The industrial camera 3 is set above the detection fixed ball 6 and is aligned with the detection fixed ball 6.

[0032] During use, the fixing plate 12 is placed horizontally on the top of the front wheel, and the two clamping plates 18 are moved toward each other in the direction of the front wheel until the clamping plates 18 clamp the front wheel. The camera bracket 4 is placed on the upper side of the hood of the vehicle 1, and the position of the camera bracket 4 is adjusted so that the industrial camera 3 is aligned with the detection fixed ball 6. The industrial camera 3 identifies the detection fixed ball 6 through image recognition. When the steering wheel of the car is turned, the turning angle of the front wheel of the car and the distance R from the detection fixed ball 6 to the kingpin can be obtained. The turning angle on the steering wheel is read by the ECU on the car, so that the turning angle ratio of the front wheel angle of the vehicle 1 under test to the steering wheel is obtained.

[0033] like Figure 4 As shown, the wheelbase L1 of the automobile wheel is a parameter given by the manufacturer, the kingpin spacing belongs to the design parameter L, the distance between the detection ball 6 and the center of the tire is known as S, the distance from the center of the wheel to the kingpin is the turning radius of the wheel, recorded as r, r=RS, then the kingpin spacing L=L1-2r.

[0034] Example 2

[0035] Reference Figure 1 and Figure 2 This embodiment is based on embodiment 1, and differs from embodiment 1 in that this embodiment provides a steering parameter calibrator for a vehicle-in-the-loop test of the vehicle 1 under test, which can further achieve the fixation of the steering assembly and the front wheels.

[0036] Specifically, a cylindrical damping shaft 13 is fixedly connected to the center of the fixed plate 12, and a rotatable handwheel shaft 14 is connected to the cylindrical damping shaft 13 (the cylindrical damping shaft 13 is a prior art, which provides a damping force for the rotation of the handwheel shaft 14, and a force is required to rotate the handwheel shaft 14). A swing arm 16 is connected to the handwheel shaft 14 above the cylindrical damping shaft 13, and a handwheel 15 for easy operation is connected to the upper side of the swing arm 16. The handwheel 15 is provided with an upper synchronous rotation hole, and the swing arm 16 is provided with a lower synchronous rotation hole that can be coaxial with the upper synchronous rotation hole. A connecting hole is provided in the center of the swing arm 16, and a plug-in portion 1501 corresponding to the connecting hole is fixed to the lower end of the handwheel 15. Both ends of the swing arm 16 are hinged with ball hinge rods 11, and the end of the ball hinge rod 11 away from the swing arm 16 is hinged to the corresponding movable plate (10).

[0037] When installing the handwheel 15, the handwheel 15 is inserted into the connecting hole through the plug-in portion 1501, and the handwheel 15 is rotated so that the upper synchronous rotation hole and one of the lower synchronous rotation holes are coaxial. A connecting pin is inserted into the upper synchronous rotation hole and then extended downward into the lower synchronous rotation hole to fix the handwheel 15 relative to the swing arm 16. When in use, just rotate the handwheel 15, which is more convenient to operate.

[0038] When in use, the fixed plate 12 is placed horizontally on the top of the front wheel, so that the hand wheel 15 is relatively in the center position in the axial direction of the front wheel. The hand wheel 15 is turned forcefully to rotate the swing arm 16. The swing arm 16 drives the two ball hinge rods 11 to swing. The two ball hinge rods 11 respectively drive the two corresponding movable plates 10 to slide along the guide rail 9. The rotation direction of the hand wheel 15 is adjusted so that the two ball hinge rods 11 respectively pull the two movable plates (10) to move toward each other until the clamping plate 18 clamps the front wheel. The hand wheel 15 is released, and the industrial camera 3 is set above the detection fixed ball 6 and is aligned with the detection fixed ball 6. The industrial camera 3 recognizes the detection fixed ball 6 through image recognition to realize the ratio of the front wheel angle of the vehicle 1 to the steering wheel angle.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A vehicle-in-the-loop test vehicle steering parameter calibrator, characterized by: include, The steering assembly includes a fixed plate (12), two clamping plates (18) capable of clamping the front wheels are connected to the fixed plate (12), a detection plate (7) is fixedly connected to the fixed plate (12) outside the clamping plates (18), and a detection ball (6) is fixed on the upper side of the detection plate (7); The detection component comprises an industrial camera (3), wherein the industrial camera (3) is arranged above a detection fixed ball (6) and is aligned with the detection fixed ball (6).

2. The vehicle-in-the-loop test vehicle steering parameter calibrator according to claim 1, characterized in that: Two guide rails (9) are fixedly connected to the fixed plate (12), and two movable plates (10) are slidably connected to the two guide rails (9) and move linearly toward or away from each other along the two guide rails (9). The clamping plate (18) is fixedly connected below the corresponding movable plate (10).

3. The vehicle-in-the-loop test vehicle steering parameter calibrator according to claim 2, characterized in that: The center of the fixed plate (12) is rotatably connected to a handwheel shaft (14), and the handwheel shaft (14) is connected to a swing arm (16). Both ends of the swing arm (16) are hinged to ball hinge rods (11), and one end of the ball hinge rod (11) away from the swing arm (16) is hinged to the corresponding movable plate (10).

4. The vehicle-in-the-loop test vehicle steering parameter calibrator according to claim 2 or 3, characterized in that: The lower side of the movable plate (10) is fixedly connected to a clamping plate bracket (8), and the clamping plate is fixedly connected to the clamping plate bracket (8).

5. The vehicle-in-the-loop test vehicle steering parameter calibrator according to claim 3, characterized in that: A cylindrical damping rotating shaft (13) is fixedly connected to the center of the fixed plate (12), and a handwheel rotating shaft (14) is connected to the cylindrical damping rotating shaft (13).

6. The vehicle-in-the-loop test steering parameter calibrator according to claim 5, characterized in that: The upper side of the swing arm (16) is connected to a hand wheel (15) for easy operation.

7. The vehicle-in-the-loop test steering parameter calibrator of claim 6, characterized in that: An upper synchronous rotation hole is formed on the hand wheel (15), and at least one lower synchronous rotation hole coaxial with the upper synchronous rotation hole is formed on the swing arm (16).

8. The vehicle-in-the-loop test steering parameter calibrator according to claim 2 or 3, characterized in that: The outer sides of the two guide rails (9) are fixedly connected with a detection connection plate (17), and the detection plate (7) is fixedly connected to the upper side of the detection connection plate (17).

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