Vehicle body control system based on CAN bus

Abstract

The invention relates to a vehicle body control system based on a CAN bus, comprising a plurality of control modules with same hardware structures, wherein each control module comprises a singlechip, a switching value acquisition circuit, a sensor signal acquisition circuit, a signal conditioning circuit, an intelligent drive circuit, an electric quantity detection circuit, a power management circuit, a CAN interface circuit, a storage and a watchdog, wherein the switching value acquisition circuit acquires a switch signal transmitted from a cab and then transmits the switch signal to the singlechip; the sensor signal acquisition circuit acquires analog signals transmitted from various sensors and then transmits the analog signals to the signal conditioning circuit; the signal conditioning circuit processes the sensor analog signals and then transmits the sensor analog signals to the singlechip; the singlechip further operates and processes switching values and the sensor analog signals and carries out corresponding output according to results; and the intelligent drive circuit receives the control signal of the singlechip and drives a vehicle-mounted controlled object. The invention simplifies a power supply system of a whole vehicle, is convenient for electric wiring, has safe and reliable property and realizes the intelligentized control.

Description

【Technical field】 [0001] The invention relates to an automobile body control system, in particular to a CAN bus-based body control system. 【Background technique】 [0002] With the continuous development of automotive electronics technology, the number of various electronic control units in the car is increasing, and the connecting wires are significantly increased. Therefore, improving the communication reliability between control units and reducing the cost of wires have become urgent problems to be solved. [0003] With more and more electrical equipment used in vehicles, from engine control to transmission system control, from driving, braking, steering system control to safety assurance system and instrument alarm system, from power management to various functions for improving comfort Efforts have been made to make the automotive electrical system form a complex large system, and all of them are controlled in the cab. In addition, with the emergence of new electronic c...

AI Technical Summary

Problems solved by technology

[0006] At present, the various components of domestic automotive electronics are independent of each other. Most of the loads such as lights and motors are driven by relays, which do not have fault protection, diagnosis, and recovery functions.

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