Title :
Large current measurements using a fibre optics current sensor
Author :
Wang Li ; Wang Bowen ; Weng Ling ; Wang Zhihua ; Huang Wenmei
Author_Institution :
Province-Minist. Joint Key Lab. of Electromagn. Field & Electr. Apparatus Reliability, Hebei Univ. of Technol., Tianjin, China
Abstract :
An optical ac-current sensor with large range and high accuracy is designed, which is based on magnetostriction effect and fiber-loop cavity ring-down technique. The model of the sensor is proposed which described the relationship of current, magnetic field, strain and ring-down time of the fiber loop. Simulation results show that both the measurement range and accuracy of the sensor are depended on prestress. The sensor is capable of measuring ac currents in the 2-50kA and the best resolution upto 0.1 A. The analysis of materials characterization and modeling can support the actual design process.
Keywords :
electric current measurement; electric sensing devices; fibre optic sensors; magneto-optical sensors; magnetostrictive devices; strain sensors; transducers; AC current measurement; current 2 kA to 50 kA; fiber loop ring-down time; fiber loop strain; fiber-loop cavity ring-down technique; fibre optics current sensor; magnetic field; magnetostriction effect; material characterization analysis; optical AC-current sensor; Current measurement; Magnetostriction; Optical fiber couplers; Optical fiber sensors; Sensitivity; Strain; current sensing; fiber-loop cavity ring-down technique; long period fiber gratings; magnetostriction effect;
Conference_Titel :
Intelligent Control and Automation (WCICA), 2012 10th World Congress on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-1397-1
DOI :
10.1109/WCICA.2012.6359209
