METHOD AND DEVICE FOR MEASURING DISTANCE BY USING OSCILLATION CIRCUIT

摘要

PURPOSE: A method and device for measuring distance by using an oscillation circuit are provided to measure the distance of points of a test piece or the length of a lead wire by comparing the oscillating frequency reduced by the phase shift delay time to a reference oscillating frequency. CONSTITUTION: A reference oscillating frequency of an oscillation circuit is determined by a lag circuit(RC). Both ends of a lead wire to be measured are connected to both terminals formed by opening the lag circuit. The oscillating frequency of which phase shifting is delayed corresponding to the length of the lead wire is measured by operating the oscillation circuit. The length of the lead wire is calculated by comparing the reduced oscillating frequency with the reference oscillating frequency.