Method and device for detecting sensor errors

US11293939B2 · kind B2 · utility

Assignee

• Siemens Mobility GmbH · DE

Inventors

• Daniela Dejaco · Graz, AT
• Bernhard Lukas Girstmair · Graz, AT
• Gerald Grabner · Graz, AT
• Andreas Haigermoser · Leibnitz, AT
• Johannes Simon · Graz, AT

Key dates

• Filing date: Oct 1, 2019
• Grant date: Apr 5, 2022
• Expiry date: Feb 10, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/302
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Method for detecting sensor errors, wherein measurements are taken, discharge time data with a first discharge time constant is read out from a data storage unit of the sensor and corresponding measurement signals as well as the discharge time data are transmitted to a computing unit, where a signal processing, a signal evaluation and a data evaluation occur in the computing unit and filtered signals are formed by filtering the measurement signals, where parameter values of a discharge function are determined via a logarithmic function of the filtered signals, a second discharge time constant is determined from the discharge function and where the first discharge time constant and the second discharge time constant are compared to detect errors, faults or damage of the sensor such that the influences of sensor errors on the measurements can be reduced.