基于STM32的机车多通道频率信号采集板的设计  

Design of locomotive multi-channel frequency signal acquisition boards based on STM32

作　　者：张姣姣 葸勇 梁宇鹏 ZHANG Jiaojiao;XI Yong;LIANG Yupeng(CRRC Dalian Institute Co.,Ltd.,Dalian 116023,China;Rolling Stock and Traction Department,China Railway Lanzhou Group Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]中车大连机车研究所有限公司,辽宁大连116023 [2]中国铁路兰州局集团有限公司机务部,甘肃兰州730030

出　　处：《铁道机车与动车》2024年第12期21-22,45,I0002,共4页Railway Locomotive and Motor Car

摘　　要：提出基于STM32系列微控制器实现的多通道低频信号采集输入捕获方法,可以同时获得采集频率、脉冲宽度和占空比,不需要增加硬件电路,脉冲信号可以滤波,隔离直接引入GPIO端口,对接口电路要求不高。该方法适用于机车控制系统,可实现多通道低频信号高精度快速采集,具有数据存储和分析功能,可通过CAN与其他设备通信。The paper proposes a multi-channel low-frequency signal acquisition and input capture method based on STM32 microcontrollers,by which the acquisition frequency,pulse width,and duty cycle can be simultaneously obtained without adding hardware circuits.The pulse signal can be filtered,isolated,and directly introduced into the GPIO port,with low requirements for interface circuits.This method is suitable for locomotive control systems and can achieve high-precision and fast acquisition of multi-channel low-frequency signals.It has data storage and analysis functions and can communicate with other devices through CAN.

关 键 词：STM32 测频 测占空比 

分 类 号：U264.911[机械工程—车辆工程]