明显诚 许博

摘  要： 汽车室内照明系统中通过LIN总线通信节点替代复杂的线束，能够实现简单、精准的照明调控。设计通过1个主节点以及2个从节点进行控制的汽车室内照明智能调控系统，系统通过光照度采集模块，利用光敏电阻采集汽车室内当前光照度;根据当前光照度信号，利用以MC56HC908GZ60芯片为核心的LIN模块，实现汽车室内照明灯控制命令的响应、传输和调控，控制命令信号通过LIN总线传输到前、后控制器中，两种控制器采用光照度恒定控制算法，实现汽车室内光照度的恒定调控。实验结果表明，该系统输出电压和电流能够保持相对稳定，在满足汽车室内照明系统需求的同时，将亮度误差控制在1%以下，实现汽车室内照明灯的精确控制。

关键词： 汽车室内照明; 智能调控; 照明调控; 信号控制; 亮度誤差; LIN总线

中图分类号： TN948.2?34; TP368                 文献标识码： A                  文章编号： 1004?373X（2019）14?0161?04

Design of intelligent control system based on LIN bus for automotive indoor lighting

MING Xiancheng1， XU Bo2

（1. Engineering Training and Management Experiment Center， Chongqing University of Technology， Chongqing 400054， China;

2. East China Institute of Computing Technology， Shanghai 200233， China）

Abstract： The LIN bus communication node is used to replace the complex wiring harness in the automobile indoor lighting system， which can achieve simple and accurate lighting control. An intelligent control system of automobile indoor lighting is designed， which is controlled by one master node and two slave nodes. The current illumination of automobile indoor is collected by photoresistor and illumination acquisition module. According to the current illumination signal， the LIN module with MC56HC908GZ60 chip as the core is used to realize the response， transmission and control of the control command of automobile indoor lighting and to control the command signals which are transmitted to front and rear controllers through LIN bus. The two controllers adopt constant illumination control algorithm to achieve constant illumination control in automobile indoor. The experimental results show that the output voltage and current of the system can keep relative stability， and the brightness error can be controlled below 1% while meeting the requirements of the automobile indoor lighting system， so as to realize the accurate control of the automobile indoor lighting.

Keywords： automobile indoor lighting; intelligent regulation; illumination regulation; signal control; brightness error; LIN bus

0  引  言

当前，基于CAN总线实现汽车室内照明控制的方式已得到越来越多的使用，然而当汽车总线节点逐渐上升，且电子技术开始向中低档汽车延伸后，基于CAN总线的汽车室内照明控制受成本限制，实用性能与性价比均有所降低[1?2]。在此情况下，基于LIN总线实现汽车室内照明智能控制方法应运而生。基于LIN总线的汽车室内照明调控系统是以普通的串行通信接口为基础。LIN主线主要应用在无需CAN性能、带宽和较为简单的控制系统中[3]，LIN子总线是对CAN网络的扩展，结合CAN网络实现对汽车的控制。由于汽车室内照明调控系统无实时性要求[4]，且汽车室内照明控制模块连接的传感器与执行器较多，适合采用LIN总线进行控制，具有系统结构简单、控制等级清晰的优点，还能降低成本提升性价比，实现汽车室内照明的精准控制。……