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1. (WO2017037000) CAPACITIVE STRUCTURE AND METHOD FOR DETERMINING AN AMOUNT OF CHARGE USING THE CAPACITIVE STRUCTURE

Pub. No.:    WO/2017/037000    International Application No.:    PCT/EP2016/070278
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Aug 30 01:59:59 CEST 2016
IPC: G01R 29/24
H01G 7/06
Applicants: ROBERT BOSCH GMBH
Inventors: SCHREIVOGEL, Martin
Title: CAPACITIVE STRUCTURE AND METHOD FOR DETERMINING AN AMOUNT OF CHARGE USING THE CAPACITIVE STRUCTURE
Abstract:
The invention relates to a method for determining an amount of charge (Q) using a capacitive structure (102) which has an electrode device (106), a dielectric material (108) with a voltage-dependent permittivity, and a counter-electrode device (110). The method has an adjusting step, an applying step, and a detecting step. In the adjusting step, an electric reference potential (118) is adjusted between the electrode device (106) and the counter-electrode device (110) in order to adjust a reference capacity (C1). In the applying step, an electrical potential (120) resulting from the amount of charge (Q) is applied in addition to the reference potential (118) in order to obtain a resulting capacity (C2). In the detecting step, a capacity change (ΔC) is detected between the reference capacity (C1) and the resulting capacity (C2) in order to determine the amount of charge (Q).