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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Study on the Methods of Weak Signal Acquisition Based on LabVIEW
verfasst von : Qirong Lu, Tao Wang, Yuanyuan Huang, Lin Sun
Erschienen in: Recent Advances in Computer Science and Information Engineering
Verlag: Springer Berlin Heidelberg
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Signal from Tunable diode laser absorption is weak and not easy to acquire. Methods of autocorrelation detection and crosscorrelation detection are used to collect the signal from strong noise on LabVIEW platform. The simulation results indicated that with the same amplitude and same SNR, all the detection error is less than 0.70%. This method is used to a poisonous gas monitor system based on LabVIEW and it is confirmed that the method is effective to obtain the fact signal from lower SNR signal. Remarkably the method is designed by LabVIEW, it is easy to modify, upgrade and used as a subVI in other LabVIEW control system.