Patent · US Expired

Method for monitoring a tachometer signal

US4808920A · kind A · utility

4Cited by

8References

6Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Jurgen Brauninger · Stuttgart, DE
James F. Holmes · Portland, US
Albrecht Sieber · Möhrendorf, DE

Key dates

Filing date	Dec 5, 1986
Grant date	Feb 28, 1989
Priority date	—
Expiry date	Dec 5, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG01P21/02
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for monitoring of a tachometer signal is suggested, wherein the tachometer output signal is not only monitored with respect to its presence, but in addition also with respect to its plausibility. One exemplified embodiment may be realized with the assistance of a correspondingly programmed computer, wherein the tachometer signal change is checked to determine whether it is within predetermined limits. Furthermore, a possibility of reciprocating switching between erroneous and non-erroneous speed signals is eliminated.

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