基于PIC单片机的A/D采集模块实现  

Implement of A/D Acquisition Module Based on PIC Microcontroller

作　　者：龚征华[1] 庞明 周冠泽[1] 张岩[1] 王晓初[3] 袁景淇[3] 

机构地区：[1]中国船舶工业集团公司第708研究所,喷水推进国防重点实验室,上海200011 [2]通标标准技术服务(上海)有限公司,上海201612 [3]上海交通大学,上海200240

出　　处：《微型电脑应用》2016年第1期1-3,共3页Microcomputer Applications

基　　金：国家自然科学基金(61233004);教育部博士点基金(20110073110018)

摘　　要：针对喷水推进控制系统A/D采集频率低的问题,采用PIC单片机独立完成系统采集功能,并利用RS-232串口完成数据通信,提高了系统的采集频率和稳定性。同时,针对工业现场A/D采集过程中的信号干扰问题,利用隔离变压器切断干扰的传播途径,达到了良好的干扰抑制效果。为进一步满足系统显示与控制精度,根据采集信号的特点,灵活采用了限幅滤波法,同时进一步测试表明采集系统具有良好的灵敏性。In order to increase A/D sampling frequency of the marine water-jet propulsion system,an independent acquisition system based on the PIC microcontroller was proposed.The acquisition system,which used the RS-232 serial port for data communication,may both increase the sampling frequency and enhance the stability.Meanwhile,the isolation transformer is used to cut off the transmissions of interference signals during A/D acquisition in real applications,which achieved a satisfactory interference suppression effect.To meet the accuracy requirement of display and control,limit breadth filter is utilized to adapt the characteristics of the sampling signal.Testing results illustrated that the acquisition system had superior performance in compared with the system practiced on a marine water-jet propulsion system.

关 键 词：喷水推进 A/D采集 干扰分析 限幅滤波 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]