一种基于数字PID控制精密电流源的设计与实现  

Design and implementation of a precision current source based on digital PID control

作　　者：陈盼辉[1] 郭立峰[1] 陆古兵[1] 金传喜[1] 

机构地区：[1]海军工程大学核能科学与工程系,武汉430033

出　　处：《海军工程大学学报》2016年第3期108-111,共4页Journal of Naval University of Engineering

摘　　要：针对使用4～20 mA电流作为输入信号的过程参数测控仪表的测试与校准,设计了一种步进为0.01mA、输出电流范围为0～20mA的精密电流源。该电流源使用集成数控电流源产生可变电流,并使用数字PID控制提高电流源的稳定性和精度。测试表明：该电流源工作稳定,输出误差小于±0.05%FS,能够广泛地应用于相关测控仪表的测试与校准。A precision current source with the range of 0～20mA and the stepping of 0.01 mA is designed to deal with the testing and calibration for the measurement and control instruments with the current of 4～20mA as the input signal.The precision and stability of current source are improved by using the integrated current source to generate the variable current and the method of digital PID control.The test shows that this current source can work steadily with the error less than ±0.05%FS and be widely used in the testing and calibrating for the related measurement and control instruments.

关 键 词：电流源 精密 PID 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]