Board Level Integrated Microsystem Design and Associated Technique for Impedance Analysis of Resonator Sensors
Authors: Zeng, Kefeng; Ong, Keat Ghee; Yang, Xiping; Grimes, Craig A.
Source: Sensor Letters, Volume 4, Number 4, December 2006 , pp. 388-397(10)
Publisher: American Scientific Publishers
Abstract:An impedance analysis technique is applied to measure the complex steady-state vibration characteristics of a magnetoelastic sensor. Magnetoelastic sensors belong to the broad class of resonator sensors, equivalent to a LC oscillation circuit. The electronic implementation resulted in an integrated single board embedded system that, when interfaced with a computer, uses a single solenoid coil to characterize sensor resonance behavior in the frequency domain by obtaining the complex (magnitude, phase) impedance spectrum. A theoretical model is able to accurately describe the measured sensor spectrum. The impedance technique is applied to endotoxin detection and monitoring of blood coagulation. The simplicity of the electronics and the flexibility of the software design make the system a simple, low-cost, and functional agile enabling tool for practical use of the sensor technology.
Document Type: Research Article
Publication date: December 2006
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