An ABS automatic testing system

Abstract

This application relates to the field of testing equipment, and in particular to an automatic ABS testing system, which includes a host computer and a wheel speed simulator. The wheel speed simulator includes a motor driver, a stepper motor, a gear ring, and a wheel speed sensor. The gear ring is connected to the output shaft of the stepper motor. The stepper motor drives the gear ring to rotate, simulating wheel rotation. The wheel speed sensor works with the gear ring to detect the rotational speed. The motor driver controls the rotation and stop of the stepper motor. The host computer communicates with the motor driver to send braking signals. The wheel speed sensor communicates with the ECU to enable the ECU to acquire wheel speed signals. The wheel speed simulator may also include a support and a housing. The stepper motor can be configured to simulate the front and rear wheels of a two-wheeled motorcycle. The host computer also communicates with the ECU to determine whether the wheel speed simulation is normal. This application achieves the technical effect of effectively simulating wheel rotation, realizing automatic testing of the ABS system, and conveniently determining whether the wheel speed simulation is normal.

Description

Technical Field

[0001] This application relates to the field of testing equipment, and in particular to an automated ABS testing system. Background Technology

[0002] ABS is one of the core active safety systems for two-wheeled motorcycles. Its function is to prevent wheel lock-up during emergency braking, thereby maintaining the vehicle's steering ability and driving stability, and greatly reducing the risk of accidents. Therefore, any ABS product must undergo extremely rigorous and comprehensive testing before leaving the factory to ensure its reliable operation under various conditions.

[0003] In actual operation, when a vehicle brakes suddenly, the hydraulic braking system applies the brakes rapidly, causing the wheel speed to drop quickly. At this time, the wheels may lock up. When the ECU reads the wheel speed data and detects wheel lockup, it sends a control signal to the HCU (Hydraulic Control Unit) of the ABS system, causing the HCU to control the operation of the hydraulic braking system and prevent wheel lockup.

[0004] Therefore, when testing an ABS system, it is particularly important to check whether the ECU and HCU are working properly.

[0005] However, since ABS systems are typically tested using specialized test benches, which mainly examine the circuit connections and parameters of the ECU and HCU to check whether the hardware is functioning properly, the test data has a weak correlation with real-world vehicle conditions. This makes it difficult to effectively verify the reliability of the ABS system in real-world driving scenarios, and there is a risk that the product may malfunction after leaving the factory. Utility Model Content

[0006] To effectively simulate the real-world operating conditions of ABS in vehicles, thereby improving testing accuracy and effectively verifying the reliability of the ABS system in real-world scenarios, this application provides an automatic ABS testing system. The technical solution adopted is as follows: An ABS automatic testing system includes a host computer and a wheel speed simulator; The wheel speed simulator includes a motor driver, a stepper motor, a gear ring, and a wheel speed sensor; The gear ring is connected to the output shaft of the stepper motor, and the stepper motor is used to drive the gear ring to rotate to simulate the rotation of a wheel; the wheel speed sensor cooperates with the gear ring to detect the rotation speed; the motor driver is communicatively connected to the stepper motor to control the rotation and stop of the stepper motor. The host computer is communicatively connected to the motor driver to send deceleration control signals to the motor driver to simulate braking; The host computer is connected to the ECU for communication, and the motor driver is connected to the ECU for communication. The wheel speed sensor is used to connect to the ECU for communication so that the ECU can receive wheel speed signals. The HCU is connected to the ECU (3) for communication to receive control signals from the ECU, and the host computer is connected to the HCU for communication to receive braking signals.

[0007] By adopting the above technical solution, a stepper motor drives a gear ring to rotate, simulating wheel rotation. A wheel speed sensor detects the rotational speed, effectively simulating the real working conditions of ABS in a vehicle. The host computer communicates with the motor driver to send a deceleration signal, thereby slowing down the motor to simulate braking. The ECU uses the wheel speed sensor to determine whether the wheel is locked and sends a control signal to the HCU to activate the HCU and prevent lock-up. This process verifies whether the signal transmission between the ECU and HCU is normal, thus verifying the reliability of the ECU and HCU in the ABS system under real-world conditions and improving the accuracy of detection.

[0008] Preferably, the wheel speed simulator further includes a support with an inner groove, the stepper motor is fixed on the support, and the gear ring is disposed in the inner groove.

[0009] By adopting the above technical solution, a support with an inner groove is provided, the stepper motor is fixed on the support, and the gear ring is located in the inner groove, which can provide support and a certain degree of protection for the stepper motor and the gear ring.

[0010] Preferably, the wheel speed simulator further includes a housing, and the support and stepper motor are both disposed inside the housing.

[0011] By adopting the above technical solution, the outer casing protects the support and stepper motor, preventing them from being interfered with or damaged by external factors.

[0012] Preferably, there are two stepper motors, which are used to simulate the front wheel and rear wheel of a two-wheeled motorcycle respectively; there are also two gear rings.

[0013] By adopting the above technical solution, and simultaneously setting two stepper motors and two gear rings to simulate the front and rear wheels of a two-wheeled motorcycle, the actual driving conditions of a two-wheeled motorcycle can be simulated more realistically, thus improving the accuracy of the test.

[0014] Preferably, the host computer is connected to the ECU for reading the wheel speed signal received by the ECU, and for determining whether the wheel speed simulation is normal.

[0015] By adopting the above technical solution, the host computer communicates with the ECU to read the wheel speed signal received by the ECU, which can determine whether the wheel speed simulation is normal, effectively simulate the real working conditions of ABS in the vehicle, and improve the accuracy of detection.

[0016] In summary, this application includes at least one of the following beneficial technical effects: 1. The stepper motor drives the gear ring to rotate, simulating wheel rotation. This effectively simulates the real working conditions of ABS in a vehicle, improving the accuracy of the test and verifying the reliability of the ABS system in real-world scenarios. The host computer communicates with the motor driver, HCU, etc., and can control the stepper motor to decelerate and simulate braking, determining whether the HCU is working properly, thus improving the effectiveness of the test. 2. The wheel speed sensor detects the rotational speed of the gear ring and transmits the wheel speed signal to the ECU, making the test more in line with the actual situation and solving the problem of weak correlation between existing test data and actual vehicle operating conditions. Attached Figure Description

[0017] Figure 1 This is a circuit module block diagram of the ABS automatic testing system in the embodiments of this application; Figure 2 This is a circuit diagram of the wheel speed simulator in the embodiments of this application; Figure 3 This is a schematic diagram of the wheel speed simulator in an embodiment of this application.

[0018] The following are labels in the attached diagram: 1. Host computer; 2. Wheel speed simulator; 21. Motor driver; 22. Stepper motor; 23. Gear ring; 24. Wheel speed sensor; 25. Support; 26. Housing; 3. ECU; 4. HCU; 41. Solenoid valve; 42. Hydraulic pump. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0020] The ABS automatic testing system provided in this application uses a host computer 1 and a wheel speed simulator 2 to simulate the actual vehicle conditions, thereby effectively simulating the real working conditions of ABS on a vehicle and improving the accuracy of testing. The following is a further detailed description of this application.

[0021] Specifically, the ABS automatic testing system includes a host computer 1 and a wheel speed simulator 2, wherein the wheel speed simulator 2 includes a motor driver 21, a stepper motor 22, a gear ring 23 and a wheel speed sensor 24.

[0022] Wheel speed sensor 24 is a sensor used to detect rotational speed. It typically operates based on the Hall effect or magnetoelectric induction principle. Wheel speed sensor 24 works in conjunction with gear ring 23. When gear ring 23 rotates, wheel speed sensor 24 can detect the rotational speed of gear ring 23 and convert the rotational speed signal into an electrical signal output.

[0023] The host computer 1 can be a computer. The host computer 1 communicates with the ECU 3 and can send control commands to the ECU 3. The motor driver 21 communicates with the stepper motor 22 and controls the rotation and stopping of the stepper motor 22. The motor driver 21 also communicates with the ECU 3. After receiving the control commands from the host computer 1, the ECU 3 sends control signals to the motor driver 21, thereby causing the stepper motor 22 to operate. The output shaft of the stepper motor 22 is connected to the gear ring 23. When the stepper motor 22 rotates, the gear ring 23 rotates accordingly, thus simulating the rotation of the wheels when a vehicle is moving.

[0024] Furthermore, wheel speed sensor 24 is communicatively connected to ECU3, enabling ECU3 to receive wheel speed data. Additionally, host computer 1 is communicatively connected to ECU3 to read the wheel speed signals received by ECU3, used to determine whether the wheel speed simulation is normal.

[0025] HCU4 is the hydraulic control unit of the ABS system. HCU4 communicates with ECU3, receives braking signals from ECU3, and generates braking signals. HCU4 typically consists of components such as solenoid valves and hydraulic pumps. The solenoid valves are activated by the ECU3 coil, causing them to engage and disengage. The hydraulic pump connects to the vehicle's brakes to drive them and prevent wheel lock-up.

[0026] During testing of the vehicle's ECU3 and HCU4, a control command is sent from the host computer 1 to the ECU3. The ECU3 then generates a control signal based on this command, which in turn controls the stepper motor 22 to rotate via the motor driver 21. The host computer 1 is also communicatively connected to the motor driver 21, and through the host computer 1, a deceleration signal is transmitted to the motor driver 21, causing the motor driver 21 to control the stepper motor 22 to decelerate urgently, thereby simulating an emergency braking action.

[0027] At this time, the wheel speed sensor 24 reads the rotational speed of the gear ring 23 in real time. If both ECU3 and HCU4 are working normally, ECU3 will receive the wheel speed signal and send a control signal to HCU4. The solenoid valve and hydraulic pump of HCU4 will operate normally.

[0028] Since the solenoid valve of HCU4 is directly controlled by the coil of ECU3 and performs a lifting / lowering action, the normal operation of the solenoid valve is determined by verifying whether the action is performed normally. However, since HCU4 is not actually installed in the vehicle, its hydraulic pump is not connected to the vehicle's hydraulic braking system. Therefore, the hydraulic pump does not operate during simulated braking. Consequently, HCU4 sends a braking signal to the host computer 1, and the normal operation is determined by whether a braking signal is generated.

[0029] Furthermore, the wheel speed simulator 2 also includes a support 25 and a housing. The support 25 has an inner groove, the stepper motor 22 is fixed on the support 25, the gear ring 23 is disposed in the inner groove, and the wheel speed sensor 24 is fixed on the support 25. The support 25 and the stepper motor 22 are both disposed inside the housing.

[0030] Two stepper motors 22 are provided, one for each of the front and rear wheels of a two-wheeled motorcycle; two gear rings 23 are also provided. The arrangement of two stepper motors 22 and gear rings 23 allows for a more realistic simulation of the movement of a two-wheeled motorcycle. Each stepper motor 22 independently controls the rotation of one gear ring 23, thus simulating the rotational speeds of the front and rear wheels respectively. This allows for more accurate testing of the ABS system's performance under different wheel speeds.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An ABS automatic test system characterized by: Includes host computer (1), wheel speed simulator (2), ECU (3) and HCU (4); The wheel speed simulator (2) includes a motor driver (21), a stepper motor (22), a gear ring (23), and a wheel speed sensor (24). The gear ring (23) is connected to the output shaft of the stepper motor (22), which drives the gear ring (23) to rotate to simulate wheel rotation; the wheel speed sensor (24) cooperates with the gear ring (23) to detect the rotation speed; the motor driver (21) is communicatively connected to the stepper motor (22) to control the rotation and stop of the stepper motor (22); The host computer (1) is communicatively connected to the motor driver (21) to send deceleration control signals to the motor driver to simulate braking; The host computer (1) is connected to the ECU (3) for communication, and the motor driver (21) is connected to the ECU (3) for communication. The wheel speed sensor (24) is used to connect to the ECU (3) for communication so that the ECU (3) can receive wheel speed signals. The HCU (4) is connected to the ECU (3) for communication to receive control signals from the ECU (3), and the host computer (1) is connected to the HCU (4) for communication to receive braking signals.

2. The ABS automatic test system of claim 1, wherein: The wheel speed simulator (2) also includes a support (25), the support (25) having an inner groove, the stepper motor (22) being fixed on the support (25), and the gear ring (23) being disposed in the inner groove.

3. The ABS automatic test system of claim 2, wherein: The wheel speed simulator (2) also includes a housing (26), and the support (25) and the stepper motor (22) are both located inside the housing (26).

4. The ABS automatic test system of claim 1, wherein: Two stepper motors (22) are provided and are used to simulate the front wheel and rear wheel of a two-wheeled motorcycle, respectively; two gear rings (23) are provided accordingly.

5. The ABS automatic test system of claim 1, wherein: The host computer (1) is connected to the ECU (3) for reading the wheel speed signal received by the ECU (3) to determine whether the wheel speed simulation is normal.

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