Method for detecting a lack of driver activity at the steering wheel of a motor vehicle
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United States of America Patent
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Mar 28, 2017
Grant Date -
Jul 4, 2013
app pub date -
Feb 27, 2013
filing date -
Aug 30, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A method detects a lack of driver activity at the steering wheel of a motor vehicle. A moment imparted by hand to the steering wheel by the driver is repeatedly measured, and if in a plurality of successive measurements the magnitude of a value of the moment imparted by hand does not exceed a threshold value, a lack of driver activity is inferred. The magnitude of the threshold value is dependent on the surface condition, in particular on the degree of unevenness, of the roadway being traveled upon. The degree of unevenness of the roadway may be derived from a measured vertical acceleration in the wheel suspension of the vehicle or from deceleration and/or acceleration signals of at least one wheel of the vehicle.
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