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Capacitance and Inductance Sensor Circuits for Detecting the Lengths of Open- and Short-Circuited Wires

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3 Author(s)
You Chung Chung ; Inf. & Commun. Eng., Daegu Univ., Gyeongsan, South Korea ; Nirmal N. Amarnath ; Cynthia M. Furse

The length of an open- or short-circuited wire is linearly proportional to the capacitance or inductance of the wire, respectively. Several types of simple and inexpensive circuits are introduced to measure these values. Open-circuited (capacitance) measurements are very effective. Short-circuited (inductance) measurements are more difficult, and not all of the circuits worked well. A 555 timer circuit was found to have the best overall performance to locate the ends of both open- and short-circuited wires. The capacitance and inductance values of various types of aircraft wires were measured and verified with analytical equations.

Published in:

IEEE Transactions on Instrumentation and Measurement  (Volume:58 ,  Issue: 8 )