Circuit Design for Alternating Current Field Measurement Make Use of Lock-in Amplifier

Abstract:

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In ACFM, the measured signal is very weak and always inevitably includes the noises and the unwanted signal. Make use of lock-in amplifier technology to have designed a disturbance magnetic field testing circuit which includes eliminating 2.5 volt DC circuit, amplifying and filtering circuit, phase-shifting circuit and switching voltage multiplier. This circuits designed can performe the measurement and do-nosing for weak magnetic signal of ACFM. The experiment indicated that make use of lock-in amplifier technology to design and optimize ACFM detection circuit is an effective method

Info:

Periodical:

Edited by:

Zhou Mark

Pages:

1107-1112

DOI:

10.4028/www.scientific.net/AMM.52-54.1107

Citation:

S. K. Ren et al., "Circuit Design for Alternating Current Field Measurement Make Use of Lock-in Amplifier", Applied Mechanics and Materials, Vols. 52-54, pp. 1107-1112, 2011

Online since:

March 2011

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Price:

$35.00

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