基于CAN总线和USB存储的焊接参数采集系统

Welding parameters acquisition system based on CAN bus and USB storage

针对焊接生产监控和质量评估中存在的问题,提出一种基于CAN总线和USB存储的焊接参数采集与传输方案,并重点设计了采集节点的硬件和软件。数据采集节点以STM32微控制器为核心,对焊机的焊接电流、电压等参数进行实时采集并通过CAN总线传输到上位机;同时,利用USB接口芯片CH376扩展节点的USB主控功能,实现对采集数据的高速本地USB存储。CAN总线通信方案采用分时上传的调度方式,避免多节点通信时可能出现的总线拥堵。测试表明,该系统成功实现了对采集数据的低速CAN总线传输和高速本地存储,有助于促进焊接生产监控技术的发展。

In order to solve the problems of real-time monitoring and quality evaluation in welding,this paper proposed a welding parameter acquisition and transmission scheme based on CAN bus and USB storage,and designed the hardware and software of the acquisition node. The CAN acquisition node,centered on 32-bit embedded microcontroller,was responsible for collecting and processing welding current,voltage and other parameters,which could be sent to CAN master node through CAN bus network. With the help of USB-HOST interface chip CH376,the acquisition node could achieve high speed local USB storage. In the communication scheme,the time sharing upload scheduling method was adopted to avoid low communication efficiency. Tests showed that the system had successfully implemented low-speed CAN bus transmission and high-speed local storage for data acquisition,which helped to promote the development of welding production monitoring technology.