A fiber-optic current sensor for aerospace applicationsA robust, accurate, broadband, alternating current sensor using fiber optics is being developed for space applications at power frequencies as high as 20 kHz. It can also be used in low- and high-voltage 60-Hz terrestrial power systems and in 400-Hz aircraft systems. It is intrinsically EMI (electromagnetic interference) immune and has the added benefit of excellent isolation. The sensor uses the Faraday effect in optical fiber and standard polarimetric measurements to sense electrical current. The primary component of the sensor is a specially treated coil of single-mode optical fiber, through which the current carrying conductor passes. Improved precision is accomplished by temperature compensation by means of signals from a fiber-optic temperature sensor embedded in the sensing head. The authors report on the technology contained in the sensor and also relate the results of precision tests conducted at various temperatures within the wide operating range. The results of early EMI tests are shown.
Document ID
19910053383
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Patterson, Richard L. (NASA Lewis Research Center Cleveland, OH, United States)
Rose, A. H. (NASA Lewis Research Center Cleveland, OH, United States)
Tang, D. (NASA Lewis Research Center Cleveland, OH, United States)
Day, G. W. (NIST Boulder, CO, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: Intersociety Energy Conversion Engineering Conference