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A new method for measuring magnetoelastic sensor resonance frequency

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4 Author(s)
Tangsheng Yang ; Coll. of Electr. & Inf. Eng., Hunan Univ, Changsha, China ; Jin Wei ; Qingyun Cai ; Lingwen He

This paper describes a new method of measuring magnetoelastic sensor resonance frequency. In traditional bell-ring interrogating method, the sensor response decays rapidly if placed in viscous liquid and its resonant frequency is hard to be measured. The new method using a persistent excitation makes the sensor keep vibrating during measuring. To eliminate the interference of excitation signal to output signal, we designed a figure-8 antisymmetric structure dictation coil. The paper describes the working principle and gives out the main function circuit. This new method obtained a good result in a-amylase concentration measurement.

Published in:

Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on

Date of Conference:

16-19 Aug. 2009

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