Patent · US Active

Method for measuring a capacitance value

US10101862B2 · kind B2 · utility

3Cited by

2References

6Claims

0Family size

Assignee

Leopold Kotsai GmbH & Co. KG · DE

Inventors

Uwe Borgmann · Recklinghausen, DE
Carl Christian Lexow · Dortmund, DE

Key dates

Filing date	Sep 22, 2016
Grant date	Oct 16, 2018
Priority date	—
Expiry date	Jan 19, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH03K2217/960725
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method for measuring a capacitance value of a capacitive sensor uses an integration process. For the integration process, the sensor is connected to an integration capacitor having a known capacitance value greater than the capacitance value of the sensor and a voltage UCI of the integration capacitor is measured by an A/D converter after a number IZ of executed integration cycles of the integration process. The method includes carrying out the integration process until the number IZ of executed integration cycles has reached the number N of integration cycles to be executed, adding a voltage value UCI (N) of the integration capacitor, which is determined by the A/D converter, to the total voltage value Utotal, increasing the number N, and repeating until the number N exceeds a predetermined value. The final total voltage value Utotal is indicative of the capacitance value of the capacitive sensor.

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