摘要
设计了一种高稳定的数控式恒流源,以减少电流波动对裂纹电位信号的影响;采用MSP430系列单片机(MCU)作为主控制器,进行系统软硬件设计;以基准电压为参考,结合串联负反馈电路和增量式PID算法对输出电流值进行实时调整。实验结果表明:该恒流源系统电流输出稳定性优于10×10^(-6),裂纹电位信号稳定性较好,满足裂纹监测仪需求。
A highly stable numerically controlled constant current source is designed to reduce the influence of current fluctuations on the crack potential signal.Using MSP430 MCU as the main controller to design the software and hardware of the system.Taking the reference voltage as a reference,combining the series negative feedback circuit and the incremental PID algorithm to adjust the output current value in real time.Experimental results show that the current output stability of the constant current source system is better than 10×10^(-6),and the crack potential signal stability is better,which meets the needs of crack monitors.
作者
薛河
赵有俊
王双
倪陈强
孙裕满
王欣玥
XUE He;ZHAO Youjun;WANG Shuang;NI Chenqiang;SUN Yuman;WANG Xinyue(College of Mechanical Engineering,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《传感器与微系统》
CSCD
北大核心
2023年第4期91-94,共4页
Transducer and Microsystem Technologies
基金
国家自然科学基金资助项目(52075434)
陕西省重点研发计划资助项目(2017GY-034)
陕西省自然科学基础研究计划资助项目(2021JM-389)。
关键词
恒流源
高稳定
增量式PID算法
基准电压
裂纹监测
constant current source
stability
incremental PID algorithm
reference voltage
crack monitoring
