Patent ID: 9291510
Filing Date: 2016-03-22
CPC Classification: G01D,G01K

Claim Text:
1. A measuring apparatus comprising: a sensor unit that includes a coil and an electrical conductor arranged such that an area of an overlap zone varies as a position of an object changes, or the coil and a magnetic member arranged such that an area of an overlap zone varies as a position of an object changes; a capacitor and a resistor that make up a series circuit, the series circuit including the coil; a voltage applying unit that applies an input voltage Vi to the series circuit; a voltage detector that detects a voltage Vo across the capacitor or the resistor; a phase detector that detects a phase of the voltage Vo; a magnitude detector that detects a magnitude of the voltage Vo; feature data in which the phase, the magnitude, an environmental temperature of the sensor unit, and a change in area of the overlap zone are associated with one another; and a calculator that calculates the environmental temperature of the sensor unit and the change in area of the overlap zone based on the feature data using the detected phase and the magnitude obtained by actual measurement of the voltage Vo as parameters.