Title :
The design of signal processing circuit of precision inductive sensor in portable instrument
Author :
Liu Bo ; Deng Huiyuan ; Feng Zhichao ; Fu Jibao ; Hu Yi
Author_Institution :
Higher Educ. Key Lab. for Meas. & Control Technol. & Instrumentations of Heilongjiang Province; Coll. of Meas.-Control Tech. & Commun. Eng., Harbin Univ. of Sci. & Technol., Harbin, China
fDate :
June 28 2013-July 1 2013
Abstract :
In order to improve the detecting sensitivity of inductive sensor and system signal-to-noise ratio, Wien bridge sine wave oscillator circuit with low distortion for excitation signal and weak signal processing circuit is designed. Transformer is used to block the part of DC in carrier signal for improving the detection sensitivity of the system. The structure of circuit is simple, practical and reliable. Experimental results showed that circuit system can effectively improve the signal-to-noise ratio and the noise of system.
Keywords :
inductive sensors; network synthesis; oscillators; portable instruments; signal processing equipment; transformers; Wien bridge sine wave oscillator circuit; detecting sensitivity; excitation signal processing circuit; low distortion; portable instrument; precision inductive sensor; signal processing circuit design; signal-to-noise ratio; transformer; weak signal processing circuit; DH-HEMTs; Differential amplifiers; Instruments; Magnetic circuits; Measurement uncertainty; Optical fiber amplifiers; Voltage measurement; Inductive sensors; The differential amplifier circuit; Transformer; Wien bridge sine wave oscillator circuit;
Conference_Titel :
Strategic Technology (IFOST), 2013 8th International Forum on
Conference_Location :
Ulaanbaatar
Print_ISBN :
978-1-4799-0931-5
DOI :
10.1109/IFOST.2013.6616984
