Intelligent automobile test target object moving platform

Abstract

The application discloses an intelligent automobile testing target object moving platform, which comprises a chassis, a shell, a steering system, a driving system and a power supply system. The shell is installed on the chassis; the steering system comprises a rotating driving mechanism, steering connecting pieces and rotating wheels, the rotating driving mechanism can be horizontally and transversely driven, two steering wheels are respectively connected with the steering connecting pieces on the same side, and the driving directions of the rotating driving mechanism are eccentrically arranged; the driving system comprises a rear suspension assembly, two driving sources, two driving connecting pieces and two driving wheels, the driving connecting pieces are chain transmission systems, the two driving wheels are respectively connected with the two driving connecting pieces, and the two driving wheels are arranged in parallel with the rotation of the driving sources, and the driving sources can drive the two driving wheels to roll forward through the two driving connecting pieces; the power supply system comprises two groups of battery packs, which are used for alternately supplying power for the target object moving platform. The intelligent automobile testing target object moving platform can test various working conditions of the target object, and is convenient to disassemble and transport.

Description

Technical Field

[0001] This invention relates to the field of testing technology, and more specifically to a target object moving platform for testing intelligent vehicles. Background Technology

[0002] With technological advancements, the testing requirements for Advanced Driver Assistance Systems (ADAS) in automobiles are constantly increasing. Key testing items include AEB (Autonomous Emergency Braking), ACC (Adaptive Cruise Control), and LDW (Low-Distance Warfare) tests. Considering safety and cost, actual vehicles are generally not used as test vehicles. Therefore, a dedicated intelligent vehicle testing target movement platform is needed to replace physical vehicles for testing. This platform needs to have customizable event editing capabilities, smooth high-speed movement, precise path control, good acceleration and deceleration performance, long driving range, and safe and convenient charging and discharging.

[0003] Currently, there are few similar products available in China. Most ADAS testing uses drag-and-drop target objects or imported mobile platform target objects for testing. While this can meet some testing needs to a certain extent, it also has the following drawbacks:

[0004] 1. The drag-type target testing system is only suitable for low-speed straight-line scenarios, and acceleration and deceleration are limited by the drag belt, which limits the simulation of the dynamic performance of real vehicles. At the same time, it cannot cope with the test conditions of high-speed curved paths, and the test conditions are relatively simple.

[0005] 2. Imported mobile platforms are expensive, and their maintenance and repair are cumbersome and complex. The shell and chassis are integrated, making them bulky and inconvenient to transport and move. If the shell is damaged, the entire chassis and shell need to be replaced. Furthermore, the battery pack is integrated with the platform and cannot be disassembled. If the system runs out of power, it must be returned to the base for replenishment, which limits the working efficiency of the mobile platform and hinders the development of intelligent vehicle testing technology. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a target mobile platform for intelligent vehicle testing, which can test the target under various working conditions and is convenient for disassembly and transportation.

[0007] To achieve the above objectives, the present invention provides a target object moving platform for intelligent vehicle testing, comprising:

[0008] Chassis;

[0009] A housing, which is mounted on a chassis, is designed to withstand the pressure of the test vehicle.

[0010] The steering system includes a rotary drive mechanism, a steering connector, and rotating wheels. The rotary drive mechanism is installed at the front center of the chassis and can perform horizontal lateral drive. There are two sets of steering connectors, which are respectively hinged to the left and right ends of the rotary drive mechanism and to the chassis. There are two rotating wheels, which are respectively connected to the steering connector on the same side and are offset from the driving direction of the rotary drive mechanism.

[0011] A drive system includes a rear suspension assembly, two drive sources, two drive connectors, and two drive wheels. The rear suspension assembly is fixed to the rear center of the chassis. The two drive sources are symmetrically arranged on the left and right sides of the rear suspension assembly via mounting brackets. The two drive connectors are respectively connected to the drive source on the same side. The two drive wheels are respectively connected to the two drive connectors. The drive sources can drive the two drive wheels to roll forward through the two drive connectors.

[0012] The power supply system includes two battery packs, which are respectively installed on the chassis and are used to alternately supply power to the target motion platform.

[0013] Furthermore, the rotation drive mechanism includes a drive motor, a connecting shaft, a push rod, and a tie rod. The drive motor is mounted on the chassis, and the telescopic shaft of the drive motor can extend and retract horizontally. The push rod is horizontally positioned, and the connecting shaft connects the telescopic rod of the drive motor and the push rod. There are two tie rods, which are symmetrically hinged to the left and right ends of the push rod, and the other end of the tie rod is slidably connected to the steering connector on the same side.

[0014] Furthermore, the steering connector includes a front suspension assembly, a steering bracket, a slider, and a connecting shaft. The front suspension assembly is suspended on the chassis and is arranged parallel to and spaced apart from the push rod. The steering bracket is a triangular plate with a groove. The extension line of the groove intersects the push rod. The slider is slidably disposed in the groove. The connecting shaft is rotatably inserted into the slider. The end of the tie rod is connected to the end of the connecting shaft. One corner of the steering bracket is hinged to the end of the front suspension assembly. The rotating wheel is connected to one side of the steering bracket.

[0015] Furthermore, the drive connector includes a small sprocket, a chain, a large sprocket, a rear drive axle, and a rear drive shaft. The small sprocket is disposed on the rotating shaft of the drive motor. The rear drive axle is fixed to the side of the front end of the rear suspension assembly. The rear drive shaft is disposed on the rear drive axle on the same side. The large sprocket is sleeved on the rear drive shaft. The two ends of the chain are respectively sleeved on the small sprocket and the large sprocket.

[0016] Furthermore, it also includes a braking mechanism, which is connected to the output shaft of the drive source and is used to drive the drive source to brake.

[0017] Furthermore, the braking mechanism includes a brake bracket, a rear axle brake motor, a brake caliper, a brake disc, a rear axle brake master cylinder, a brake caliper wheel cylinder, and brake friction pads; the brake bracket is fixed on the chassis, the brake caliper is mounted on the brake bracket, the brake caliper wheel cylinder is provided inside the brake caliper, the brake disc is connected to the output shaft of the drive motor via a key, the brake caliper wheel cylinder and the rear axle brake master cylinder are connected via an oil pipe, and the telescopic shaft of the rear axle brake motor is connected to the piston of the rear axle brake master cylinder via bolts.

[0018] Furthermore, it also includes a steering brake mechanism, which is connected to the main shaft of the rotating wheel and is used to drive the steering wheel to brake;

[0019] The steering brake mechanism includes a brake disc, a brake caliper, a front axle brake motor, a front axle brake master cylinder 41, and rotating friction pads; the brake disc is sleeved and fixed on the main shaft of the steering wheel, the brake caliper 51 is fixed to the front wheel bracket by bolts, the front axle brake motor and the front axle brake master cylinder are fixed on the chassis, and the telescopic shaft of the front axle brake motor is connected to the piston of the front axle brake master cylinder, and a brake cylinder is provided inside the brake caliper.

[0020] Furthermore, the power supply system also includes a U-shaped suction cup and a charging base. The battery packs are mounted on the chassis via the U-shaped suction cup, and the charging base is used to charge the two battery packs.

[0021] Furthermore, the steering system also includes a swing limiting component, which is disposed on the chassis and connected to the push rod and the steering bracket, and can engage with the steering bracket at the gap where the connecting shaft stops.

[0022] Furthermore, the swing limiting assembly includes a transmission rack, a gear, a generator, a piston cylinder, an electromagnet, a piston plate, an elastic support, a push rod, and a friction plate. The transmission rack is mounted on the push rod, and the gear meshes with the transmission rack. One end of the gear's rotating shaft is rotatably mounted on the chassis, and the other end of the gear's rotating shaft is connected to the generator. When the gear's rotating shaft rotates, the generator generates electricity. The slider is an I-shaped block, and the middle part of the slider is slidably located in the groove. The limiting blocks at both ends of the slider are slidably connected to the upper and lower surfaces of the steering bracket.

[0023] The upper surface of the steering bracket has a T-shaped clearance groove parallel to the sliding groove, with the smaller segment of the T-shaped clearance groove located on the outer side. The piston cylinder is mounted on the limiting block and located within the T-shaped clearance groove. The electromagnet is fixed to the top of the piston cylinder, and a wire is wound around the electromagnet, with a segment of the wire electrically connected to the generator. The piston plate is a magnetic plate, and it magnetically repels the electromagnet when the wire is energized. The elastic support member is supported between the piston plate and the bottom of the piston cylinder. The push rod is connected to the piston plate and extends from the bottom of the piston cylinder. The friction plate is located at the end of the push rod and within the larger end of the T-shaped clearance groove. When the wire is not energized, the upper surface of the friction plate abuts against the interface between the larger and smaller segments of the T-shaped clearance groove.

[0024] The beneficial effects of this invention are:

[0025] The aforementioned intelligent vehicle testing target moving platform has a compact structure. Its steering system allows for flexible control of the entire platform's movement direction, enabling testing under various conditions, including straight lines and curves. Because the rotation drive mechanism's driving direction is lateral, and the steering wheels are offset from the rotation drive mechanism's driving direction, the lever principle allows for effortless driving. Simultaneously, the drive system smoothly drives the entire platform and controls its speed, further enhancing the range of testing conditions. Furthermore, the power supply system is lightweight and compact, making it easy to carry and use, and flexibly adaptable to the working environment of the mobile platform. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 This is a schematic diagram of the housing in the target object mobile platform for intelligent vehicle testing of the present invention;

[0028] Figure 2This is a top view of the steering system in the target object moving platform for intelligent vehicle testing of the present invention;

[0029] Figure 3 This is a partial schematic diagram of the steering system in the target object moving platform for intelligent vehicle testing of the present invention;

[0030] Figure 4 This is a schematic diagram of the swing limiting component in the target object moving platform for intelligent vehicle testing of the present invention;

[0031] Figure 5 for Figure 4 Schematic diagram of point A in the diagram;

[0032] Figure 6 This is a top view of the drive system in the target object moving platform for intelligent vehicle testing of the present invention;

[0033] Figure 7 This is a partial schematic diagram of the drive system in the target object moving platform for intelligent vehicle testing of the present invention;

[0034] Figure 8 This is a three-dimensional schematic diagram of the drive system in the target object moving platform for intelligent vehicle testing of the present invention;

[0035] Figure 9 This is a three-dimensional schematic diagram of the steering and braking mechanism in the target object moving platform for intelligent vehicle testing of the present invention;

[0036] Figure 10 This is a three-dimensional schematic diagram of the power supply system in the target object mobile platform for intelligent vehicle testing of the present invention;

[0037] Figure 11 This is a three-dimensional schematic diagram of the battery pack in the target object mobile platform for intelligent vehicle testing of the present invention;

[0038] Figure label:

[0039] 100. Chassis; 200. Shell; 210. Aluminum alloy base layer; 220. Plastic buffer layer;

[0040] 300. Steering system; 310. Rotary drive mechanism; 311. Push motor; 312. Connecting shaft; 313. Push rod; 314. Tie rod; 320. Steering connector; 321. Front suspension assembly; 322. Steering bracket; 323. Slider; 324. Connecting shaft; 330. Rotating wheel; 340. Swing limit assembly; 341. Transmission rack; 342. Gear; 343. Generator; 344. Telescopic motor; 345. Friction plate;

[0041] 400. Drive system; 410. Rear suspension assembly; 420. Drive source; 430. Drive connector; 431. Small sprocket; 432. Chain; 433. Large sprocket; 434. Rear drive axle; 435. Rear drive shaft; 440. Drive wheel;

[0042] 500. Power supply system; 510. Battery pack; 520. U-shaped suction cup; 530. Charging base;

[0043] 600. Braking mechanism; 610. Brake bracket; 620. Rear axle brake motor; 630. Brake caliper; 640. Brake disc; 650. Rear axle brake master cylinder; 660. Brake friction pad;

[0044] 700. Steering brake mechanism; 710. Brake disc; 720. Brake caliper; 730. Front axle brake motor. Detailed Implementation

[0045] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0046] Please see Figures 1 to 11 The intelligent vehicle testing target mobile platform in this embodiment includes a chassis 100, a housing 200, a steering system 300, a drive system 400, and a power supply system 500.

[0047] Please see Figure 1 Specifically, the housing 200 is mounted on the chassis 100 to withstand the impact of the test vehicle. In this embodiment, the housing 200 may comprise an internal aluminum alloy substrate layer 210 and a plastic buffer layer 220. The aluminum alloy substrate layer 210 and the plastic buffer layer 220 are fixed together by bolts. The outer side of the alloy substrate layer 210 is sloped to guide the test vehicle to run over the moving platform during impact.

[0048] The plastic buffer layer 220 is used to absorb the energy during an impact and reduce the impact on the chassis 100. If damage occurs due to impact parameters, the plastic buffer layer 220 can be replaced directly without replacing the aluminum alloy base layer 210, thus reducing maintenance and usage costs.

[0049] Please see Figure 2The steering system 300 includes a rotary drive mechanism 310, a steering connector 320, and steering wheels 330. The rotary drive mechanism 310 is mounted at the front center of the chassis 100 and is capable of horizontal lateral drive. There are two sets of steering connectors 320, which are respectively hinged to the left and right ends of the rotary drive mechanism 310 and to the chassis 100. There are two steering wheels 330, which are respectively mounted on the steering connectors 320 on the same side and are offset from the driving direction of the rotary drive mechanism 310.

[0050] Please see Figure 6 The drive system 400 includes a rear suspension assembly 410, two drive sources 420, two drive connectors 430, and two drive wheels 440. The rear suspension assembly 410 is fixed to the rear center of the chassis 100. The two drive sources 420 are symmetrically arranged on the left and right sides of the rear suspension assembly 410 via mounting brackets. The two drive connectors 430 are respectively connected to the drive source 420 on the same side. The two drive wheels 440 are respectively connected to the two drive connectors 430. The drive sources 420 can drive the two drive wheels 440 to roll forward through the two drive connectors 430. The power supply system 500 includes two battery packs 510, which are respectively mounted on the chassis 100 and are used to alternately supply power to the target motion platform.

[0051] This motion platform has a compact structure. The steering system 300 allows for flexible control of the entire platform's movement direction, enabling various working conditions tests, including straight lines and curves. Since the drive direction of the rotary drive mechanism 310 is lateral, and the steering wheel 330 is offset from the drive direction of the rotary drive mechanism 310, the lever principle can achieve the purpose of reducing driving effort. In addition, the drive system 400 can smoothly drive the entire platform's movement and control the speed, further increasing the number of working conditions tested. Furthermore, the power supply system 500 is designed to be lightweight and compact, making it simple and convenient to carry and use, and can flexibly adapt to the working environment of the mobile platform.

[0052] Please see Figure 1-5 In this embodiment, the rotation drive mechanism 310 includes a drive motor 311, a connecting shaft 312, a push rod 313, and a horizontal tie rod 314. The drive motor 311 is mounted on the chassis 100, and the telescopic shaft of the drive motor 311 can extend and retract horizontally. The push rod 313 is horizontally arranged, and the connecting shaft 312 is connected to the push rod 313. There are two horizontal tie rods 314, which are symmetrically connected to the left and right ends of the push rod 313, and the other end of the horizontal tie rod 314 is slidably connected to the steering connector 320 on the same side.

[0053] In practical implementation, the drive motor 311 can be a servo motor, and the tie rod 314 and the push rod 313 can adopt a threaded telescopic structure to adjust the toe angle of the front wheel, thereby adjusting the maximum steering angle of the steering wheel 330.

[0054] In addition, the rotation drive mechanism 310 also includes a spherical bearing, which is installed between the tie rod 314 and the push rod 313. The spherical bearing can rotate and swing at any angle during movement, making the movement of the connecting parts more flexible.

[0055] The steering connector 320 includes a front suspension assembly 321, a steering bracket 322, a slider 323, and a connecting shaft 324. The front suspension assembly 321 is suspended on the chassis 100 and is arranged parallel to and spaced apart from the push rod 313. The steering bracket 322 is a triangular plate with a groove. The extension line of the groove intersects the push rod 313. The slider 323 is slidably disposed in the groove. The connecting shaft 324 is rotatably inserted into the slider 323. The end of the tie rod 314 is connected to the end of the connecting shaft 324. One corner of the steering bracket 322 is hinged to the end of the front suspension assembly 321. The steering wheel 330 is connected to one side of the steering bracket 322.

[0056] When in use, the motor 311 is started, and the push rod 313 is pushed through the connecting shaft 312. The push rod 313 drives the two steering brackets 322 to rotate through the two horizontal tie rods 314, which in turn drives the steering wheel 330 to turn, thereby realizing the steering of the platform.

[0057] With this structure, the lever mechanism formed by the tie rod 314 and the steering bracket 322 can increase the output torque, reduce the motor load, save installation space, and make the steering smoother and more reliable.

[0058] Please see Figure 2 , 4 and Figure 5 As another preferred embodiment, the steering system 300 also includes a swing limiting component 340. Specifically, the swing limiting component 340 is disposed on the chassis 100 and connected to the connecting shaft 312 and the steering bracket 322. It can engage the steering bracket 322 when the connecting shaft 312 stops, preventing the steering bracket 322 from swinging slightly and further improving the rotation accuracy.

[0059] Specifically, the swing limit assembly 340 includes a transmission rack 341, a gear 342, a generator 343, a piston cylinder 344, an electromagnet 346, a piston plate 347, an elastic support 348, a push rod 349, and a friction plate 345. The transmission rack 341 is mounted on the push rod 349, and the gear 342 meshes with the transmission rack 341. One end of the shaft of the gear 342 is rotatably mounted on the chassis 100, and the other end of the shaft of the gear 342 is connected to the generator 343. When the shaft of the gear 342 rotates, the generator 343 generates electricity. The slider 323 is an I-shaped block, and the middle part of the slider 323 is slidably located in the groove. The limit blocks at both ends of the slider are slidably connected to the upper and lower surfaces of the steering bracket 322.

[0060] The upper surface of the steering bracket 322 is provided with a T-shaped clearance groove parallel to the sliding groove, and the smaller section of the T-shaped clearance groove is located on the outside. The piston cylinder 344 is set on the limiting block and located in the T-shaped clearance groove. The electromagnet 346 is fixed on the top of the piston cylinder 344. A wire is wound on the electromagnet 346 and the wire is electrically connected to the generator 343. The piston plate 347 is a magnetic plate, and the piston plate 347 can magnetically repel the electromagnet 346 when the wire is energized. The elastic support 348 is supported between the bottom of the piston plate 347 and the piston cylinder 344. The push rod 349 is connected to the piston plate 347 and extends from the bottom of the piston cylinder 344. The friction plate 345 is set at the end of the push rod 349 and located in the larger end of the T-shaped clearance groove. When the wire is not energized, the upper surface of the friction plate 345 abuts against the interface between the larger and smaller sections of the T-shaped clearance groove.

[0061] In normal operation, under the support of the elastic support 348, the friction plate 345 abuts against the interface between the large and small sections, thus preventing the steering bracket 322 from rotating arbitrarily. When the drive motor 311 starts, it moves the push rod 349, which in turn drives the gear 342 to rotate via the transmission rack 341, thereby starting the engine to generate electricity. This causes the electromagnet 346 to generate a magnetic field. Since the electromagnet 346 and the piston plate 347 repel each other, the piston plate 347 can be driven to push the friction plate 345 downward and against the T-shaped avoidance. When the interface between the large and small sections of the groove is detached, the slider 323 can slide smoothly, thereby driving the steering bracket 322 to steer. Conversely, when the drive motor 311 stops, the generator 343 stops generating electricity, the magnetic field of the electromagnet 346 disappears, and the force on the piston plate 347 disappears. Under the action of the elastic support 348, the piston plate 347 moves upward, and the friction plate 345 re-abuts against the interface between the large and small sections of the T-shaped clearance groove, which can prevent the steering bracket 322 from rotating arbitrarily, thereby further improving steering stability.

[0062] Please see Figure 6-8In this embodiment, the drive connector 430 includes a small sprocket 431, a chain 432, a large sprocket 433, a rear drive axle 434, and a rear drive shaft 435. The small sprocket 431 is mounted on the rotating shaft of the drive motor. The rear drive axle 434 is fixed to the side of the front end of the rear suspension assembly 410. The rear drive shaft 435 is mounted on the rear drive axle 434 on the same side. The large sprocket 433 is sleeved on the rear drive shaft 435. The two ends of the chain 432 are respectively sleeved on the small sprocket 431 and the large sprocket 433.

[0063] In practical implementation, the drive source 420 can be selected as a servo motor, and the drive connector 430 may also include a rolling bearing, which is fixed between the rear drive shaft 435 and the drive axle. By setting the rolling bearing, the friction between the rear drive shaft 435 and the drive axle can be reduced, thereby reducing wear.

[0064] Meanwhile, the drive connector 430 also includes a rolling bearing, which is fixed between the rear drive shaft 435 and the rear drive axle 434. By using a rolling bearing, the friction between the rear drive shaft 435 and the rear drive axle 434 can be reduced, thus reducing wear.

[0065] The structure of the drive mechanism described above has the following advantages: 1. Chain drive provides uniform load distribution and accurate and stable transmission, making it more suitable for the requirements of frequent acceleration and deceleration and precise speed control of the target vehicle in ADAS testing, and it also has a longer service life than belt drive; 2. Due to the size limitation of the motor, the output torque is limited, which in turn affects the acceleration performance of the mobile platform. Therefore, a small transmission ratio sprocket 431 is used to increase the torque of the drive wheel 440 while meeting the speed requirements, thereby improving the acceleration performance of the mobile platform.

[0066] Please see Figure 7 In a preferred embodiment, the mobile platform further includes a braking mechanism 600, which is connected to the output shaft of the drive source 420 and is used to drive the drive source to brake. This allows for convenient and flexible control of the movement and stopping of the entire platform.

[0067] Specifically, the braking mechanism 600 includes a brake bracket 610, a rear axle brake motor 620, a brake caliper 630, a brake disc 640, and a rear axle brake master cylinder 650. The brake bracket 610 is fixed to the chassis 100, and the brake caliper 630 is mounted on the brake bracket 610. The brake disc 640 is connected to the output shaft of the drive motor via a key, and the telescopic shaft of the rear axle brake motor 620 is connected to the piston of the rear axle brake master cylinder 650 via bolts.

[0068] When braking is required, the rear axle brake motor 620 pushes the piston of the rear axle brake master cylinder 650, compressing the brake fluid in the cylinder, causing the pressure in the inner cavity to rise, and then transmitting it through the oil pipe to the brake caliper wheel cylinder of the brake caliper 630, which in turn pushes the brake friction pad 660 to make contact with the brake disc 640, causing the moving platform to begin to decelerate.

[0069] Please see Figure 9 As another embodiment, the platform also includes a steering brake mechanism 700, which is connected to the main shaft of the steering wheel 330 and is used to drive the steering wheel 330 to brake.

[0070] Specifically, the steering brake mechanism 700 includes a brake plate 710, a brake caliper 720, a front axle brake motor 730, a front axle brake master cylinder, and rotating friction pads. The brake disc 640 is sleeved and fixed on the main shaft of the steering wheel 330, the brake plate 710 is fixed to the front wheel bracket by bolts, the front axle brake motor 730 and the front axle brake master cylinder are fixed on the chassis 100, and the telescopic shaft of the front axle brake motor 730 is connected to the piston of the front axle brake master cylinder.

[0071] When steering is not required, the front axle brake motor 730 pushes the piston of the front axle brake master cylinder, causing the oil pressure in the master cylinder to rise. The brake fluid pressure is then transmitted to the brake cylinder of the brake caliper 630 through the oil pipe, thereby driving the second push plate to move. This, in turn, pushes the rotating friction pad to rub against the brake disc 640, causing the steering wheel 330 to stop steering, thus achieving the purpose of controlling the direction.

[0072] Please see Figure 10 and 11 In this embodiment, the power supply system 500 also includes a U-shaped suction cup 520 and a charging base 530. The battery pack 510 is mounted on the chassis 100 via the U-shaped suction cup 520, and the charging base 530 is used to charge the two battery packs 510.

[0073] During use, one set of battery packs 510 alternately powers the platform, while another set of battery packs 510 is charged through the charging dock 530 to ensure testing efficiency.

[0074] In practice, each battery pack 510 contains two identical battery cells, which are installed in the battery compartments on both sides of the mobile platform during discharge.

[0075] Each battery unit may include three 24V individual cells, a battery mounting box 511, a battery pack cover 512, a six-pole connector 513, a battery status monitoring system 514, and a battery status monitoring connector 515. The 24V individual cells 516 are installed inside the battery mounting box 511 and covered by the battery pack cover 512. The six-pole connector 513 is used to connect the discharge socket of the mobile platform to the charging socket of the charging dock 513. The battery status monitoring system 514 is used to monitor the voltage, current, and temperature of each 24V individual cell 516, and simultaneously controls the power supply to cut off when charging is complete and to provide a prompt when the battery is low. The battery status monitoring connector 515 is used to transmit the battery pack parameter information monitored by the battery status monitoring system 514.

[0076] This motion platform has a compact structure. The steering system 300 allows for flexible control of the entire platform's movement direction, enabling various working conditions tests, including straight lines and curves. Since the drive direction of the rotary drive mechanism 310 is lateral, while the steering wheel 330 is eccentrically positioned relative to the drive direction of the rotary drive mechanism 310, the lever principle is used to achieve effortless driving. Simultaneously, the rotary drive mechanism 310's linear motion saves installation space. The drive system 400 smoothly drives the entire platform and controls its speed, further enhancing the range of working conditions tested. Furthermore, the power supply system 500 is designed to be lightweight and compact, making it easy to carry and use, and flexibly adaptable to various working environments where mobile platforms are mounted.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A target object moving platform for intelligent vehicle testing, characterized in that, include: Chassis; A housing, which is mounted on a chassis, is designed to withstand the pressure of the test vehicle. The steering system includes a rotary drive mechanism, a steering connector, and steering wheels. The rotary drive mechanism is installed at the front center of the chassis and is capable of horizontal lateral drive. There are two sets of steering connectors, which are respectively hinged to the left and right ends of the rotary drive mechanism and to the chassis. There are two steering wheels, which are respectively mounted on the steering connectors on the same side and are offset from the driving direction of the rotary drive mechanism. The drive system includes a rear suspension assembly, two drive sources, two drive connectors, and two drive wheels. The rear suspension assembly is fixed to the rear center of the chassis. The two drive sources are symmetrically arranged on the left and right sides of the rear suspension assembly via fixed seats. The two drive connectors are respectively connected to the drive sources on the same side. The two drive wheels are respectively connected to the two drive connectors. The drive sources can drive the two drive wheels to roll forward through the two drive connectors. and The power supply system includes two battery packs, which are respectively installed on the chassis and are used to alternately supply power to the target motion platform. The rotation drive mechanism includes a push motor, a connecting shaft, a push rod, and a horizontal tie rod. The push motor is mounted on the chassis. The telescopic shaft of the push motor can extend and retract horizontally. The push rod is horizontally positioned. The connecting shaft connects the telescopic rod of the push motor and the push rod. There are two horizontal tie rods, which are symmetrically hinged to the left and right ends of the push rod. The other end of the horizontal tie rod is slidably connected to the steering connector on the same side. The steering connector includes a front suspension assembly, a steering bracket, a slider, and a connecting shaft. The front suspension assembly is suspended on the chassis and is spaced parallel to the push rod. The steering bracket is a triangular plate with a groove. The extension line of the groove intersects the push rod. The slider is slidably disposed in the groove. The connecting shaft is rotatably inserted into the slider. The end of the tie rod is connected to the end of the connecting shaft. One corner of the steering bracket is hinged to the end of the front suspension assembly. The steering wheel is connected to one side of the steering bracket.

2. The intelligent vehicle testing target moving platform according to claim 1, characterized in that, The drive connector includes a small sprocket, a chain, a large sprocket, a rear drive axle, and a rear drive shaft. The small sprocket is disposed on the rotating shaft of the drive source. The rear drive axle is fixed on both sides of the front end of the rear suspension assembly. The rear drive shaft is disposed on the rear drive axle on the same side. The large sprocket is sleeved on the rear drive shaft. The two ends of the chain are respectively sleeved on the small sprocket and the large sprocket.

3. The intelligent vehicle testing target moving platform according to claim 2, characterized in that, It also includes a braking mechanism, which is connected to the output shaft of the drive source and is used to drive the drive source to brake.

4. The intelligent vehicle testing target moving platform according to claim 3, characterized in that, The braking mechanism includes a brake bracket, a rear axle brake motor, a brake caliper, a brake disc, a rear axle brake master cylinder, a brake caliper wheel cylinder, and brake friction pads. The brake bracket is fixed to the chassis, the brake caliper is mounted on the brake bracket, the brake caliper wheel cylinder is provided inside the brake caliper, the brake disc is connected to the drive source output shaft via a key, the brake caliper wheel cylinder and the rear axle brake master cylinder are connected via oil pipes, and the telescopic shaft of the rear axle brake motor is connected to the piston of the rear axle brake master cylinder via bolts.

5. The intelligent vehicle testing target moving platform according to claim 2, characterized in that, It also includes a steering brake mechanism, which is connected to the main shaft of the steering wheel and is used to drive the steering wheel to brake; The steering and braking mechanism includes a brake disc, a brake caliper, a front axle brake motor, a front axle brake master cylinder, and rotating friction pads. The brake disc is sleeved and fixed on the main shaft of the steering wheel. The brake caliper is fixed to the front wheel bracket by bolts. The front axle brake motor and the front axle brake master cylinder are fixed on the chassis, and the telescopic shaft of the front axle brake motor is connected to the piston of the front axle brake master cylinder. A brake cylinder is provided inside the brake caliper.

6. The intelligent vehicle testing target moving platform according to claim 2, characterized in that, The power supply system also includes a U-shaped suction cup and a charging base. The battery packs are mounted on the chassis via the U-shaped suction cup, and the charging base is used to charge the two battery packs.

7. The intelligent vehicle testing target moving platform according to claim 1, characterized in that, The steering system also includes a swing limit assembly, which is mounted on the chassis and connected to the push rod and the steering bracket, and can engage with the steering bracket during the gap when the connecting shaft stops.

8. The intelligent vehicle testing target moving platform according to claim 7, characterized in that, The swing limiting assembly includes a transmission rack, a gear, a generator, a piston cylinder, an electromagnet, a piston plate, an elastic support, a push rod, and a friction plate. The transmission rack is mounted on the push rod, and the gear meshes with the transmission rack. One end of the gear's rotating shaft is rotatably mounted on the chassis, and the other end of the gear's rotating shaft is connected to the generator. When the gear's rotating shaft rotates, the generator generates electricity. The slider is an I-shaped block, and the middle part of the slider is slidably located in the groove. The limiting blocks at both ends of the slider are slidably connected to the upper and lower surfaces of the steering bracket. The upper surface of the steering bracket is provided with a T-shaped clearance groove parallel to the sliding groove, with the smaller segment of the T-shaped clearance groove located on the outer side. The piston cylinder is disposed on the limiting block and located within the T-shaped clearance groove. The electromagnet is fixed to the top of the piston cylinder, and an electric wire is wound around the electromagnet, with the connecting segment of the electric wire electrically connected to the generator. The piston plate is a magnetic plate, and the piston plate can magnetically repel the electromagnet when the electric wire is energized. The elastic support member is supported between the bottom of the piston plate and the piston cylinder. The push rod is connected to the piston plate and extends from the bottom of the piston cylinder. The friction plate is disposed at the end of the push rod and located within the larger end of the T-shaped clearance groove. When the electric wire is not energized, the upper surface of the friction plate abuts against the interface between the larger and smaller segments of the T-shaped clearance groove.

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