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

Volume

1

fYear

2013

fDate

June 28 2013-July 1 2013

Firstpage

308

Lastpage

311

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Strategic Technology (IFOST), 2013 8th International Forum on

Conference_Location

Ulaanbaatar

Print_ISBN

978-1-4799-0931-5

Type

conf

DOI

10.1109/IFOST.2013.6616984

Filename

6616984