基于双流量传感器的汽车油耗检测系统设计

摘要

A new design scheme of automobile fuel consumption detecting system is introduced based on two separated flow sensors. The system takes the compact microcomputer AT89C2051 as controlling core, a 2 — channel analog-to-digital converter to monitor the transfer oil and return oil simultaneously, and then calculates the fuel consumption parameters. The system adopts CAN - bus to communicate and transfer the detected results,the CAN - bus module is realized with controller MCP2510 and transceiver MCP2551. The system also contains watch-dog circuit by MAX813 to anti interference. And analyzes show it has higher precision compare to the traditional detecting ways.%提出了基于双流量传感器的汽车油耗检测系统设计方案,系统以精简型单片机AT89 C2051为核心,采用双通道A/D转换器对双油路结构发动机的输油与回油流量进行实时同步检测,进而计算出油耗参数；系统采用CAN总线实现检测结果的通信传输,通信模块由串行接口的控制器MCP2510及驱动器MCP2551构成；为提高系统的抗电磁干扰能力,系统采用MAX813设计了看门狗电路；精度分析结果表明,系统具有较高的检测精度.