计量学报2020，Vol.41Issue(8)：989-996,8.DOI:10.3969/j.issn.1000-1158.2020.08.16
反射式Sagnac型光纤宽带大电流测量仪的研制与性能评估
Development and Performance Evaluation of Reflective Sagnac Optical Fiber Broadband High Current Measuring Instrument
摘要
Abstract
To deal with the difficulties of quantity transfer and on-line high current calibration for large-scale electric welding and electroplating, a prototype of reflective Sagnac fiber-optic current transformer (RS-FOCT )，named fiber broadband high current measuring instrument, was developed and proposed. The prototype utilized the techniques including the linear birefringence suppression, the retarder temperature self-compensation, the closed-loop digital signal detection, and meanWhile implemented optimization design like flexible fiber sensing coil. Several key technical features were tested. The test results showed that the measurement accuracy of the developed prototype is superior to±0.2% under the experimental condition, the scale factor errors under the changes caused by the temperature, vibration and magnetic field variation, are all less than± 0.2%. Frequency response at 1 kHz is attenuated by 0. 14%，and the -3 dB bandwidth is wider than 10 kHz. The accuracy reliability and serviceability in high current online calibration of the measuring instrument were verified. The model’s extended uncertainty of measurement error is 0.10%，the accuracy grade of the measuring instrument is in accordance with 0.2 grade.关键词
计量学/大电流测量仪/光纤电流互感器/在线校准/变比误差/不确定度Key words
metrology/ high current measuring instrument/ fiber-optic/ current transformer/ online calibration/ scale factor error/ uncertainty分类
通用工业技术引用本文复制引用
谢小军,朱才溢,李庆先,李华,罗颖..反射式Sagnac型光纤宽带大电流测量仪的研制与性能评估[J].计量学报,2020,41(8):989-996,8.基金项目
国家重点研发计划重大科学仪器设备开发专项(2016YFF0102406) （2016YFF0102406）
