JAW MOVEMENT MEASURING DEVICE

摘要

[PROBLEMS] The position of a sensor coil is accurately detected by reducing an error caused by crosstalk generated between coils. [MEANS FOR SOLVING PROBLEMS] A jaw movement measuring device detects the relative position of a sensor coil (2) with respect to an exciting coil (1) from an alternating-current signal inducted from the exciting coil (1) connected to an alternating-current power source (3) to the sensor coil (2). The measuring device corrects an alternating-current signal inducted to an X-axis coil (2a) of the sensor coil (2) using a crosstalk signal inducted from a Y-axis coil (2b) and a Z-axis coil (2c) of the sensor coil (2), corrects an alternating-current signal inducted to the Y-axis coil (2b) of the sensor coil (2) using a crosstalk signal inducted from the X-axis coil (2a) and the Z-axis coil (2c) of the sensor coil (2), corrects an alternating-current signal inducted to the Z-axis coil (2c) of the sensor coil (2) using a crosstalk signal inducted from the X-axis coil (2a) and the Y-axis coil (2b) of the sensor coil (2), and calculates the position of a tooth on which the sensor coil (2) is fixed using the alternating-current signal corrected by use of the crosstalk signal.