Implementation Method of Data Collection for Electric Power Steering System (EPS)

1. Introduction

With the rapid development of automobile technology, the electric power steering system (EPS) has become an important part of modern automobiles. With its unique advantages, such as high efficiency, low energy consumption, and environmental protection, it has gradually replaced the traditional hydraulic power steering system. The core of EPS is that it can accurately adjust the size and direction of the steering assist in real time according to the driver's steering intention and the vehicle's driving status, thereby improving driving comfort and safety. The realization of all this is inseparable from the accurate collection of key information such as vehicle cornering data. This article will elaborate on the implementation method of EPS data collection in detail.

2. Importance of EPS Data Collection

EPS data collection is the basis for realizing EPS functions. Only by accurately and in real time collecting key information such as vehicle angle data and vehicle speed data, can the EPS system use various advanced algorithms to control the rotation of the power-assisted motor based on these data, thereby providing appropriate steering assistance. Therefore, the accuracy and real-time nature of EPS data collection are crucial to the performance of the EPS system.

3. Implementation method of EPS data collection

The implementation method of EPS data acquisition mainly includes two aspects: hardware design and software design.

(I) Hardware Design

The hardware system of EPS data acquisition is mainly composed of computers, A/D conversion boards, digital signal input/output boards, sensors, and signal processing devices, etc. These hardware devices work together to complete data acquisition, conversion, and processing.

Sensor: The sensor is a key component of EPS data collection. It is responsible for converting physical quantities such as vehicle angle and speed into electrical signals. Commonly used sensors in EPS systems include torque sensors and speed sensors. Torque sensors are used to detect the torque applied by the driver to the steering wheel, and speed sensors are used to detect the vehicle's driving speed.

A/D conversion board: Since the signals output by the sensor are mostly analog signals, and the computer can only process digital signals, it is necessary to convert the analog signals into digital signals through the A/D conversion board. The accuracy and sampling rate of the A/D conversion board will directly affect the accuracy and real-time performance of data acquisition.

Digital signal input/output board: Some digital signals (such as the pulse signal output by the photoelectric encoder) need to be collected and processed through the digital signal input/output board.

Computer: The computer is the core of the EPS data acquisition system. It is responsible for receiving, storing and processing the collected data, and controlling the rotation of the power-assisted motor based on this data.

(II) Software Design

The software design of EPS data acquisition mainly includes data acquisition program, data processing program and control program.

Data acquisition program: The data acquisition program is responsible for reading data from hardware devices such as sensors, A/D conversion boards, and digital signal input/output boards, and converting them into a computer-recognizable format for storage.

Data processing program: The data processing program is responsible for processing and analyzing the collected data and extracting useful information, such as vehicle turning angle, vehicle speed, etc. At the same time, the data needs to be filtered and calibrated to improve the accuracy and reliability of the data.

Control program: The control program uses various advanced algorithms to control the rotation of the power-assisted motor based on the useful information extracted by the data processing program. The functions that the control program needs to implement include starting, stopping, forward and reverse rotation, and speed regulation of the power-assisted motor.

IV. Notes on EPS data collection

In the process of EPS data collection, the following points should be noted:

Ensure the accuracy and reliability of sensors and avoid data collection errors due to sensor failure.

Select appropriate A/D conversion board and digital signal input/output board to ensure the accuracy and real-time performance of data acquisition.

Rationally design data collection procedures, data processing procedures and control procedures to ensure the accuracy and reliability of data and improve the stability and security of the system.

Reasonable storage and management of the collected data facilitates subsequent data analysis and processing.

V. Conclusion

EPS data collection is the basis for realizing EPS functions, and its accuracy and real-time performance are crucial to the performance of the EPS system. Through reasonable hardware design and software design, accurate collection and processing of key information such as vehicle corners and speed can be achieved, providing reliable data support for the EPS system. With the continuous development of automobile technology, EPS data collection technology will continue to advance and improve, providing more solid support for the development of modern automobiles.