Apparatus for judging driving attentiveness with respect to a ratio of steering frequency components and a method therefor
First Claim
1. A driving attentiveness judging method comprising:
- a steering angle detecting step of detecting a steering angle of a motor vehicle to obtain steering angle data;
a steering frequency component detecting step of detecting at least two of a plurality of steering frequency components of respective different frequency bands from the steering angle data; and
an attentiveness determining step of estimating a driving attentiveness level based on a ratio of one of said at least two of said plurality of steering components detected to another one of said at least two of said plurality of steering frequency components detected.
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Abstract
Driving attentiveness judging method and apparatus for accurately determining the driver'"'"'s attentiveness level during driving of a motor vehicle are provided wherein steering angle data and vehicle speed data, respectively supplied from a steering angle sensor and a vehicle speed sensor, are sampled by a steering angle data sampling section and a vehicle speed data sampling section, respectively. Respective levels of road shape component, visual steering component, and corrective steering component of the steering angle data are detected by a steering angle data processing section, and a fuzzy inference output representing a driving attentiveness level is obtained by a fuzzy inference section in accordance with fuzzy rules and the three steering component levels. In accordance with the fuzzy inference output which has been subjected to vehicle speed-dependent correction by a vehicle speed correcting section, the driving attentiveness level is displayed at a display device, and also a warning mark is displayed if the vehicle speed-corrected fuzzy inference output is small.
55 Citations
29 Claims
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1. A driving attentiveness judging method comprising:
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a steering angle detecting step of detecting a steering angle of a motor vehicle to obtain steering angle data; a steering frequency component detecting step of detecting at least two of a plurality of steering frequency components of respective different frequency bands from the steering angle data; and an attentiveness determining step of estimating a driving attentiveness level based on a ratio of one of said at least two of said plurality of steering components detected to another one of said at least two of said plurality of steering frequency components detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A driving attentiveness judging apparatus comprising:
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steering angle detecting means for detecting a steering angle of a motor vehicle to obtain steering angle data; steering frequency component detecting means for detecting at least two of a plurality of steering frequency components of respective different frequency bands from the steering angle data; and attentiveness determining means for estimating a driving attentiveness level based on a ratio of one of said at least two of said plurality of steering components detected to another one of said at least two of said plurality of steering frequency components detected. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29)
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26. The driving attentiveness judging apparatus according to claim 26, wherein said steering frequency component detecting means detects a first steering frequency component corresponding to a road shape follow-up steering by a driver, a second steering frequency component which is on a higher frequency side than the first steering frequency component and which corresponds to a visual steering by the driver, and a third steering frequency component which is on a higher frequency side than the second steering frequency component and which corresponds to a corrective steering by the driver;
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said fuzzy inference section obtains, based on the first, second and third steering frequency components, first, second and third steering action factors corresponding respectively to predictiveness, effort and deliberateness of steering action as fuzzy variables, and performs the fuzzy inference by using fuzzy rules which prescribe that the driving attentiveness level rises with increase in level of the first, second and third steering action factors.
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Specification