The rail length measurement circuit design based on the lock-in amplifier technology

Author

Liu Bo ; Shao Mingxin ; Chen Yue

Author_Institution

Higher Educ. Key Lab. for Meas. & Control Technol. & Instrumentations of Heilongjiang Province, Harbin Univ. of Sci. & Technol., Harbin, China

Volume

1

fYear

2013

fDate

June 28 2013-July 1 2013

Firstpage

360

Lastpage

363

Abstract

The paper studied the rail length measurement method, analyzed the sound waves attenuation in rails. The sound wave attenuated severely after traveling through the rail, so adopted the signal correlation principle of the lock-in amplifier to detect weak signal. Then completed the circuit design such as the acoustic emission circuit, the preamplifier circuit, the signal operation circuit of the digital lock-in amplifier and so on. The lock-in amplifier did correlation operation between the signals and completed the reference signal phase shift function by DSP and at last, detected the weak signals in noises.

Keywords

acoustic emission; acoustic wave propagation; amplifiers; length measurement; network synthesis; rails; DSP; acoustic emission circuit; lock-in amplifier technology; preamplifier circuit; rail length measurement circuit design; reference signal phase shift function; signal correlation principle; signal operation circuit; sound wave attenuation; weak signals; Attenuation measurement; Circuit synthesis; Field effect transistors; Length measurement; Probes; Rails; Random access memory; weak signal length measurement lock-in amplifier;

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.2013.6616986

Filename

6616986