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http://dx.doi.org/10.6109/jkiice.2016.20.1.175

Implementation of Capacitance Measurement Equipment for Fault Diagnosis of Multi-channel Ultrasonic Probe  

Kang, Bub-Joo (Department of Information & Communication Engineering, Dongguk University at Gyeongju)
Kim, Yang-soo (Department of Electronic Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.20, no.1, 2016 , pp. 175-184 More about this Journal
Abstract
In this paper, we propose the method to measure the capacitances using not LCR meter but capacitance to voltage(C/V) conversion. And we design the analog MUX circuits that convert 192 channels to 6 MUX channels in order to implement the diagnosis of multi-channel ultrasonic probe. This paper derives the conversion function that converts the digital voltage of each MUX channel to the capacitance using the least squares method because the circuit characteristics that convert the voltage of each MUX channel to the capacitance are different. The developed prototype illustrates the performance test results that the measure times are measured by within 4sec and the measure error rates of maximum, minimum, and average values are within 5% in terms of the repeated measurements of all 192 channels.
Keywords
Capacitance Measurement; Fault Diagnosis of Ultrasonic Probe; LCR Meter;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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