Patent US5424714A successfully refreshed from Google Patents.
US5424714A
Expired / Lapsed
US
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Hydroplaning detecting system
Assignee: Honda Motor Co Ltd
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Filing: 1992-10-16
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Granted: 1995-06-13
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Expires: 2012-10-16
Abstract
Abstract A hydroplaning detecting system comprises wheel rotational speed detecting apparatus for detecting a wheel rotational speed of a wheel of a vehicle, reference pattern storage apparatus for previously storing a reference pattern of wheel rotational speed which varies over a period of time and is characteristic of hydroplaning generation, actual variation pattern extracting apparatus for extracting a actual variation in the wheel rotational speed over a period of time, and judgment apparatus for judging the matching between the reference pattern and the actual variation pattern. Thus, this hydroplaning detecting system is capable of accurately detecting the generation of hydroplaning.
Inventors
- 👤 Keiyu Kin
- 👤 Shuji Shiraishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:11
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/0237; B60T; B60T8/00; B60T8/17; B60T8/171; B60T2210/00; B60T2210/10; B60T2210/13
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
101 words
A hydroplaning detecting system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; reference pattern storage means for previously storing a reference pattern of the wheel rotational speed which varies over a period of time and is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation in the wheel rotational speed over a period of time; and judgment means for judging the matching between said reference pattern and said actual variation pattern, and for producing an output signal when matching is detected, to indicate occurrence of hydroplaning.
Claim 2
Dependent Claim
101 words
A hydroplaning detecting system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; reference pattern storage means for previously storing a reference pattern of the wheel rotational speed which varies over a period of time and is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation in the wheel rotational speed over a period of time; and judgment means for judging the matching between said reference pattern and said actual variation pattern, and for producing an output signal when matching is detected, to indicate occurrence of hydroplaning.
Claim 3
Dependent Claim
52 words
A hydroplaning detecting system according to claim 1, wherein said judgment means includes inner product calculating means for calculating an inner product between said reference pattern and said actual variation pattern, and comparator means for comparing the calculated inner product with a reference value previously stored in a reference value storage means.
Claim 4
Dependent Claim
50 words
A hydroplaning detecting system according to claim 1, wherein said judgment means includes convolution integrating means for conducting a convolution integration between said reference pattern and said actual variation pattern, and comparator means for comparing the integrated value with a reference value previously stored in a reference value storage means.
Claim 5
Dependent Claim
62 words
A hydroplaning detecting system according to claim 1, wherein said actual variation pattern extracting means includes waveform extracting means for extracting the waveform of a actual variation in detected wheel rotational speed, and normalizing means for mormalizing a high value of a speed-reduction peak wave in the extracted waveform by a high value of a speed-reduction peak wave of said reference pattern.
Claim 6
Dependent Claim
34 words
A hydroplaning detecting system according to claim 1, wherein said system further comprises alarm means for giving an alarm for the generation of hydroplaning on the basis of an output from the judgment means.
Claim 7
Dependent Claim
66 words
A hydroplaning detecting system according to claim 1, wherein in the case where driving wheels are used for the detection of hydroplaning, the system further comprises a means for vertically inverting said actual variation in the wheel rotational speed such that absolute values of changes in speed are used in said judgment means for judging the matching between said reference pattern and said actual variation pattern.
Claim 8
Dependent Claim
59 words
A hydroplaning detecting system according to claim 2, wherein said system further comprises alarm means for giving an alarm for the generation of hydroplaning on the basis of an output of the judgment means, wherein said alarm means is disabled if the wheel rotational speed is lower than said reference value previously stored in said reference value storage means.
Claim 9
Dependent Claim
59 words
A hydroplaning detecting system according to claim 3, wherein said system further comprises alarm means for giving an alarm for the generation of hydroplaning on the basis of an output of the judgment means, wherein said alarm means is disabled if the wheel rotational speed is lower than said reference value previously stored in said reference value storage means.
Claim 10
Dependent Claim
30 words
A hydroplaning detecting system according to claim 5, further comprising a wiper switch for controlling operation of windshield wipers wherein said alarm is disabled if said wiper switch is off.
Claim 11
Dependent Claim
31 words
A hydroplaning detecting system according to claim 5, further comprising a brake switch for controlling braking operations of said wheel wherein said alarm is disabled if said brake switch is off.
Claim 12
Dependent Claim
105 words
A hydroplaning detecting system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; a reference pattern storage means for storing a reference variation pattern of the wheel rotational speed which is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation pattern in the wheel rotational speed over a period of time; and judging means for judging a matching between said reference variation pattern and said actual variation pattern by using an inner product between the patterns, and for producing an output signal indicative of hydroplaning generation when the matching is detected.
Claim 13
Dependent Claim
105 words
A hydroplaning detecting system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; a reference pattern storage means for storing a reference variation pattern of the wheel rotational speed which is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation pattern in the wheel rotational speed over a period of time; and judging means for judging a matching between said reference variation pattern and said actual variation pattern by using an inner product between the patterns, and for producing an output signal indicative of hydroplaning generation when the matching is detected.
Claim 14
Dependent Claim
21 words
A hydroplaning system according to claim 11, wherein said reference variation pattern includes a pair of descending portion and ascending portion.
Claim 15
Dependent Claim
104 words
A hydroplaning system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; a reference pattern storage means for storing a reference variation pattern of the wheel rotational speed which is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation pattern in the wheel rotational speed over a period of time; and judging means for judging a matching between said reference variation pattern and said actual variation pattern by using a convolution integration between the patterns, and for producing an output signal indicative of hydroplaning generation when the matching is detected.
Claim 16
Dependent Claim
104 words
A hydroplaning system comprising: wheel rotational speed detecting means for detecting a wheel rotational speed of a wheel of a vehicle; a reference pattern storage means for storing a reference variation pattern of the wheel rotational speed which is characteristic of hydroplaning generation; actual variation pattern extracting means for extracting an actual variation pattern in the wheel rotational speed over a period of time; and judging means for judging a matching between said reference variation pattern and said actual variation pattern by using a convolution integration between the patterns, and for producing an output signal indicative of hydroplaning generation when the matching is detected.
Claim 17
Dependent Claim
22 words
A hydroplaning detecting system according to claim 13, wherein said reference variation pattern includes a pair of descending portion and ascending portion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-06-12 | 1998-12-12 | 1999-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-12 | 2002-12-12 | 2003-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-12 | 2006-12-12 | 2007-06-13 | $7700.00 | Window Closed / Lapsed |