Patent · US Active

Method for diagnosing an electrical lead to an electrode of a sensor element for sensing at least one property of a measured gas in a measured gas space

US9297782B2 · kind B2 · utility

0Cited by

0References

15Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Richard Holberg · Stuttgart, DE
Albrecht Schmidt · Kornwestheim, DE
Christoph Hagner · Ditzingen, DE

Key dates

Filing date	Dec 24, 2013
Grant date	Mar 29, 2016
Priority date	—
Expiry date	Sep 24, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4175
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for diagnosing an electrical lead to an electrode of a sensor element, for sensing at least one property of a measured gas in a measured gas space, in particular for sensing a proportion of a gas component in the measured gas or a temperature of the measured gas, is described. A measured signal indicating an internal resistance of a pump cell of the sensor element is investigated for regularity upon switching on of the control unit. Upon identification of at least one irregularity of the measured signal, a suspected fault in the lead is identified and at least one substitute action is taken. The substitute action is selected from: an application of control to the heating element which is provided for a fault situation, a check of the validity of the measured signal, and a monitoring of the heating element. A sensor apparatus is also described.

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