Title :
A Novel Displacement Transducer Using the Second-Harmonic Type of Magnetic Modulator
Author :
Wada, Tatsuhiko ; Nakazoe, Jun ; Abe, Zenmon
Abstract :
A novel displacement transducer using the secondharmonic type of magnetic modulator is proposed to detect a static displacement as low as 0.1 ¿m. The operation of transducer is based on modulating and amplifying the magnetizing force proportional to the input displacement by means of the second-harmonic type of magnetic modulator. In order to enhance signal sensitivity, 4 pole-pieces type dc bridge and differential type moving detector are used for modulation circuit of this transducer.
Keywords :
Biomedical transducers; Circuit noise; Displacement measurement; Magnetic field measurement; Magnetic modulators; Magnetic noise; Mirrors; Noise level; Operational amplifiers; Temperature;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1977.4314580
