Method for determining driving task demand based on speed variability
First Claim
1. A method of providing a driving task demand signal indicative of external distraction to a vehicle operator based on speed variability of nearby objects, the method comprising the following steps:
- sensing a coverage zone in relation to a vehicle;
detecting target objects in the sensed zone;
measuring speeds of the detected target objects in the sensed zone in consecutive time frames;
deriving a speed variability of the targeted objects from a between-target speed variability calculated from the measured speeds of a plurality of the detected target objects in one of the time frames, andgenerating the driving task demand signal from the derived speed variability of the targeted objects.
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Abstract
A system and method of assessing the driving task demand on the driver of a vehicle, and further controlling one or more devices on the vehicle as a function of the assessed driver demand is provided. The method includes sensing a coverage zone in relation to a vehicle, determining a presence of one or more objects in the sensed zone, measuring speed of each detected object in the sensed zone, determining a variation in speed of one or more sensed objects, and determining a driving task demand signal indicative of driving task demand of the vehicle as a function of the measured speed variability. The method controls one or more devices on the vehicle based on the driving task demand signal. Alternately, the driving task demand signal is determined based on vehicle speed.
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Citations
24 Claims
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1. A method of providing a driving task demand signal indicative of external distraction to a vehicle operator based on speed variability of nearby objects, the method comprising the following steps:
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sensing a coverage zone in relation to a vehicle; detecting target objects in the sensed zone; measuring speeds of the detected target objects in the sensed zone in consecutive time frames; deriving a speed variability of the targeted objects from a between-target speed variability calculated from the measured speeds of a plurality of the detected target objects in one of the time frames, and generating the driving task demand signal from the derived speed variability of the targeted objects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus for providing a driving task demand signal indicative of external distraction to a vehicle operator based on speed variability of nearby objects comprising:
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at least one sensor mountable on a vehicle to detect target objects in a sensing zone in relation to the vehicle; a processor configured to determine speeds of the detected objects in consecutive time frames, derive a speed variability of the targeted objects, and generate a driving task demand signal responsive to the derived speed variability of the targeted objects, wherein the speed variability of the targeted objects comprises a between-target speed variability derived from the measured speeds of a plurality of the detected target objects in one of the time frames. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification