基于总线技术和数据融合的嵌入式汽车仪表系统

Embedded automobile meter system based on bus technique and data fusion

研制一种新型的汽车仪表系统。该系统以CAN总线为车载网络,连接显示节点和测量节点,并采用液晶显示方式。显示节点以嵌入式控制器为核心,测量节点则以PIC单片机为核心。采用两级数据融合技术,包括初始数据融合和决策级数据融合,前者可提高数据的测量精度,后者则提供安全决策辅助,即增加了汽车仪表系统的功能。测量实例表明了这些技术和方法运用的有效性和准确性。

A new type of automobile meter system is developed. CAN bus is used as the vehicle communication network which connected the display node and the measurement node in the system, and LCD as display screen. The embeded microcontroller and the PIC singlechip processor are respectively the hard cores of the display node and the measurement node. Two-level data fusion technique, including original data fusion and decision-making data fusion, is utilized to enhance data measurment precision with the former and to provide safety decision assitant with the latter, namly to add a new function to the vehicle meter system. The measurement examples show the availablity and the veracity of these technique and methods used in the meter system.