DISPLACEMENT MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To correctly detect the displaced amount of an object whose displacement is to be measured. SOLUTION: A transmission part 11 is buried in a rock 13 for example, and a transmission coil 14b outputs a magnetic flux according to oscillation of an oscillation circuit 14a. A reception part 12 includes first and second reception coils 15a, 15b, which output first and second voltages respectively in response to the magnetic flux. First and second wave detection circuits 16a, 16b detect waves of the first and second voltages respectively to output first and second wave detection signals. A division circuit 7 performs division processing of the first and second wave detection signals to obtain results of displacement measurement.