Development of Signal Conditioning Circuit of a New Strain-Crack Detecting System

Hao Wang; Yi Shan Zhang; Shen Fang Yuan

doi:10.4028/www.scientific.net/AMR.591-593.1849

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 591-593Development of Signal Conditioning Circuit of a...

Development of Signal Conditioning Circuit of a New Strain-Crack Detecting System

Abstract:

Crack and strain detecting is an important part of Structure Health Monitoring for aircrafts in fatigue environment. A signal conditioning circuit of a new strain-crack detecting system is developed in this paper. This circuit can deal with both intelligent coating sensor and strain gage, which have a great different original resistance between the two kinds of sensors. Comparing to the Wheatstone Bridge, when the strain is being detected, the new circuit gets rid of the influences of the lead-wires and decreases the wires’ number. The principle and the constitution of the circuit are introduced. And the circuit’s performances are demonstrated by a series of experiments. The linearity error is small and the stability is good.

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Periodical:

Advanced Materials Research (Volumes 591-593)

Pages:

1849-1853

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.591-593.1849

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Online since:

November 2012

Authors:

Hao Wang, Yi Shan Zhang, Shen Fang Yuan

Keywords:

Constant Current Source, Crack, ICS, Strain, Strain Gage

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References

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