Patent · US Active

Method for detecting contact on a capacitive sensor element

US10788941B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

KOSTAL Automobil Elektrik GmbH & Co. KG · DE

Inventor

Uwe Borgmann · Recklinghausen, DE

Key dates

Filing date	Mar 15, 2019
Grant date	Sep 29, 2020
Priority date	—
Expiry date	Mar 15, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/96073
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for detecting contact of a capacitive sensor includes transferring charge quantities in multiple successive cycles from the capacitive sensor to an integration capacitor having a known capacitance value. A voltage of the integration capacitor is measured. The measured voltage is processed to generate a sensor amplitude that is indicative of a capacitance value of the capacitive sensor. Contact of the capacitive sensor is detected based on a temporal behavior of the sensor amplitude. For instance, contact of the capacitive sensor is detected based on the rate of change of the sensor amplitude.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.