大型养路机械车载数据采集系统的设计

为解决大型养路机械中信号采集和处理的需求，设计了多通道多模式数据采集系统，以SAM9X35为核心，以大容量DDR2为数据缓存，将采集到的数据采用CAN总线传至上位机，下位机模块可以进行在线升级．整体方案包括系统电源管理模块的方案．CAN通信接口电路以及下位机数据采集模块的设计与实现．根据系统的复杂性和多任务性，采用μC／OS—II实时操作系统，开发了数据采集和预处理程序．

The design of vehicle data acquisition system on large maintenance machine

To resolve the signal sampling and processing in Large track maintenance machine, the paper designed a multi-channel and multi-mode data acquisition system, which used SAM9X35 as the core, which had a large capacity DDR2 as data cache, transmitted acquisition data to upper-computer by CAN-BUS. The slave computer module can be upgraded online. This paper introduced the overall design, including Power management and CAN communications interface circuits and slave computer data sampling module. According to the complexity and multiple tasks of the system, the real-time operating system μC/OS-II is adopted in the software platform, developing the procedure of data acquisition and preprocessing.