Method and device for sensor monitoring, especially for ESP system for motor vehicles
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United States of America Patent
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Jul 30, 2002
Grant Date -
N/A
app pub date -
Aug 1, 2001
filing date -
Feb 1, 1999
priority date (Note) -
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Abstract
The present invention relates to a method and a device for monitoring sensors that sense in each case individual reference variables or measured variables (A, B, C) relating to a process (32), which are especially suited for an electronic stability program (ESP) for vehicles. A particularly high degree of reliability is achieved by monitoring the course of the output signals of the individual sensors in a cyclical and sequential fashion in that analytical redundancies are produced from process reference variables and process measured variables (A, B) which are currently not being monitored by means of a multi-process model (31) for a normal operational mode, and a residuum (33) is formed of the redundancies along with the output signal being currently monitored. After evaluation of the residuum (36) and comparison with a threshold value (35), a fault signal (F) is generated when the residuum reaches the threshold value.
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