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1. (WO2017036626) METHOD AND DEVICE FOR DETERMINING A SENSOR COIL INDUCTANCE

Pub. No.:    WO/2017/036626    International Application No.:    PCT/EP2016/064824
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Jun 28 01:59:59 CEST 2016
IPC: G01D 5/20
G01R 27/26
Applicants: ROBERT BOSCH GMBH
Inventors: BUCK, Thomas
MERZ, Andreas
LEIDICH, Stefan
Title: METHOD AND DEVICE FOR DETERMINING A SENSOR COIL INDUCTANCE
Abstract:
The invention relates to a method for determining a sensor coil inductance of an eddy current sensor (2) by means of a LC-oscillator circuit (3), wherein the sensor coil inductance is determined by integration as a function of an oscillation frequency (fLc) and a resonant capacitance of the LC-oscillator circuit (3). It is provided that during the integration the oscillation frequency (fLc) is detuned at least once.