摘要
在高精度测试仪表直流输出校准、精密测量、计量系统研制领域,需要研究直流标准源精度及分辨率提升策略,实现精密可调直流标准源国产化。研制了一种精密可调直流标准源,采用双路PWM合成的分压调控方式,实现输出直流电压0.1μV的分辨率;通过温度补偿、精密倒相、无漂移滤波和电流补偿技术达到了输出4 ppm不确定度的指标,并编写了补偿校正算法以提高输出精度。通过实验测试验证,所开发的直流标准源长期工作稳定可靠,可以满足高性能直流基准使用需求。
In the field of high-precision DC output calibration of testing instruments and the development of precision measurement and measuring systems, it is essential to investigate strategies for improving the accuracy and resolution of DC standard sources and achieving the localization of precision adjustable DC standard sources. This paper presents the development of a precision adjustable DC standard source that uses a dual Pulse Width Modulation(PWM) synthesis voltage division regulation mode to achieve a resolution of 0.1 μV for the output DC voltage. By utilizing temperature compensation, precise phase inversion, drift-free filtering, and current compensation technology, the standard source was able to achieve an output uncertainty index of 4 ppm. Furthermore, a compensation correction algorithm was developed to improve the output accuracy. Experimental results confirm that the developed DC standard source operates reliably and stably over extended periods, making it suitable for high-performance DC reference requirements.
作者
郭俊言
杨春玲
杨旭强
齐超
GUO Junyan;YANG Chunling;YANG Xuqiang;QI Chao(Harbin Institute of Technology,Harbin 150001,China)
出处
《计量科学与技术》
2023年第1期3-9,共7页
Metrology Science and Technology
基金
黑龙江省高等教育教学改革重点委托项目(SJGZ20200052、SJGZ20200048)
哈尔滨工业大学教学发展基金项目(XSZ2020005)。
关键词
PWM
直流基准
双路合成
精密
标准源
PWM
DC reference
dual-channel synthesis
precision
standard source
