Automobile speed signal processing method

Abstract

The invention provides an automobile speed signal processing method, belonging to the field of automobile electronic technique. The invention solves the problems that the existing automobile controller does not have unified automobile speed signal sources and the automobile types of different configurations do not adopt the same controller for processing. The automobile speed signal processing method provided by the invention is used in an automobile speed signal processing system and comprises the following steps: a. receiving automobile speed signals, and if the automobile speed signal 1 and / or the automobile speed signal 2 are / is received, carrying out the step b; b. detecting the automobile speed signal 1, if the automobile speed signal 1 is effective, carrying out the step c, and if the automobile speed signal 1 is ineffective, carrying out the step d; c. assigning the automobile speed signal 1 to a secondary automobile speed signal and carrying out the step i; d. detecting the automobile speed signal 2, and if the automobile speed signal 2 is effective, carrying out the step e; e. assigning the automobile speed signal 2 to a secondary automobile speed signal and carrying outthe step i; and i. transmitting the secondary automobile speed signal to a CAN (controller area network) bus by utilizing a gateway for each control unit to use. The invention has the advantage that each automobile type can use the same set of automobile speed processing strategy.

Description

technical field [0001] The invention belongs to the technical field of automotive electronics and relates to a vehicle speed signal processing method. Background technique [0002] With the development of the economy and the improvement of people's living standards, automobiles have become one of the important means of transportation for people to travel. Vehicle control is a relatively complicated process, among which, the vehicle speed signal is a very important signal for vehicle control. [0003] Every car must display its speed on the instrument, and the source of this speed is nothing more than the speed sensor or ABS (anti-lock braking system) wheel speed, and for different cars, the speed sensor and ABS may not all have, so each Vehicle models may use different sources for displaying vehicle speed, and some controllers need to use vehicle speed signals. If the vehicle model configurations are different, the sources of vehicle speed signals obtained by these controll...

AI Technical Summary

Problems solved by technology

[0004] For this reason, our company applied for an invention patent named "A Vehicle Speed ​​Signal Processing System" on December 18, 2009. In this processing system, the engine controller EMS and the instrument cluster ICU collect the vehicle speed signal from the vehicle speed sensor respectively. 1. Vehicle speed The signal two and the vehicle speed signal three collected by the wheel speed signal processing device can be selected according to its own selection mechanism, which can avoid the loss of the vehicle speed signal when the vehicle speed sensor fails, but this selection mechanism is relatively simple and not flexible enough

Images