摘要
为了提高沥青混凝土搅拌设备计算机控制系统的可靠性,针对其工作环境对输入信号预处理电路的特殊要求,通过比较的方法,论述了温度检测和配料称量等模拟信号及开关量输入信号处理电路设计的依据,并设计了相应的电路。针对变频器输出频率显示信号中的高频噪声,设计了相应的噪声消除电路,给出了进一步提高系统抗干扰能力的措施。将设计的电路应用于LB2000和LB3000型沥青混凝土搅拌设备计算机控制系统,进行了测试。测试结果表明:输出信号稳定,且消除了高频干扰,提高了系统的可靠性和抗干扰能力。
The computer control system of bituminous concrete mixter equipment has a specific requirement for pre-treating circuits of input signals. In order to improve the system＇s stability, the design of the switch input and analogue input circuits of temperature detecting and the input matter measure is provided. According to the high frequency noise of inverter output frequency display signal, the noise absorbing circuit is designed, the measures of reducing noise are presented. Those circuits are tested with LB2000 and LB3000 bituminous concrete mixters. The results show that the output signal has a good stabilization without high frequency noise, The system＇s stability can be improved, its ability of anti-interference can be increased. 5 figs, 6 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第4期108-110,共3页
Journal of Chang’an University(Natural Science Edition)
关键词
电子技术
计算机控制系统
信号检测
电路设计
搅拌设备
electronic technology
computer control system
signal detection
circuit design
mixer equipment
