光纤电焊电流测量技术研究

doi:10.3969/j.issn.1000-1158.2022.08.17

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摘要针对直流逆变电阻焊机焊接电流精确测量的需求,提出基于光纤电流传感技术的焊接电流测量方法。建立了光纤电流传感器闭环检测系统动态模型,通过优化系统的前向增益,提升了传感器响应速度和带宽。仿真和实验结果表明:传感器的上升时间约为4.1 μs,在DC~30kHz范围内幅频特性衰减小于0.3%。基于该动态模型计算传感器对焊接电流纹波分量的响应,仿真结果表明:系统的动态跟踪能力可满足对纹波电流的测量需求。利用等安匝法对光纤电流传感器进行校准,在直流5~50kA范围内,传感器的测量误差优于±0.05%。现场实验结果证明了光纤电流传感器用于直流逆变焊接电流测量及电焊电流测试仪现场校准的可行性。

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	赵叶铭
	王晓飞
	李传生
	邵海明
	李奇

关键词 ：计量学, 大电流测量, 光纤电流传感器, 直流逆变电焊机, 电焊电流测试仪

Abstract：In response to the demand for accurate measurement of welding current of DC inverter resistance welding machines, a welding current measurement method based on fiber-optic current sensing technology is proposed.A dynamic model of the closed-loop detection system of a fiber-optic current sensor is established.By optimizing the forward gain of the system, the response speed and bandwidth of the sensor are both improved.The simulation and experimental results show that the rise time of the sensor is about 4.1 μs, and the amplitude-frequency characteristic attenuation is less than 0.3% over the range of DC to 30kHz.Based on the dynamic model, the sensors response to the welding current ripple component is calculated.The simulation results show that the dynamic tracking ability of the system can satisfy the measurement requirements of the ripple current.The fiber-optic current sensor is calibrated by the equal ampere-turn method, and the measurement error of the sensor is better than ±0.05% over the range of DC 5kA to 50kA.The field experiment results prove the feasibility of the fiber-optic current sensor using for DC inverter welding current measurement and field calibration of welding current tester.

Key words： metrology high current measurement fiber-optic current sensor DC inverter welding machine;welding current tester

收稿日期: 2020-11-26 发布日期: 2022-08-20

PACS:

TB971

基金资助:国家重点研发计划重大科学仪器设备开发专项(2016YFF0102401, 2016YFF0102404)

通讯作者: 李传生(1984-),黑龙江鹤岗人,中国计量科学研究院副研究员,博士,主要从事光纤电流传感技术、宽带大电流计量技术方面的研究。Email:lichsh@nim.ac.cn E-mail: lichsh@nim.ac.cn

作者简介: 赵叶铭(1996-),山西大同人,北京信息科技大学硕士研究生,主要研究方向为光纤宽带大电流传感技术。Email:906034735@qq.com

引用本文:

赵叶铭,王晓飞,李传生,邵海明,李奇. 光纤电焊电流测量技术研究[J]. 计量学报, 2022, 43(8): 1083-1088.
ZHAO Ye-ming,WANG Xiao-fei,LI Chuan-sheng,SHAO Hai-ming,LI Qi. Research on Fiber-optical Welding Current Measurement Technology. Acta Metrologica Sinica, 2022, 43(8): 1083-1088.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2022.08.17 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2022/V43/I8/1083

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