Patent US5472022A successfully refreshed from Google Patents.
Patent US3639894A successfully refreshed from Google Patents.
US3639894A
Expired / Lapsed
US
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Apparatus for detecting traffic information
Assignee: Omron Corp
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Filing: 1970-02-11
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Granted: 1972-02-01
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Expires: 1990-02-11
Abstract
Abstract An apparatus for detecting traffic information on a street, which includes a vehicle detector provided with a plurality of vehicle-detecting elements having their respective predetermined detection areas on the street. One of the detecting elements is always operatively connected to the detector to provide for the detector a detection area extending a minimum distance or length along the street in the direction in which vehicles run, for measurement of traffic information under the normal traffic condition; while the other detecting elements are selectively and additionally connected to the detector to increase the distance of the detection area of the detector for measurement under stagnated traffic conditions.
Inventors
- 👤 Ryohei Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:33
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/01; G08G1/042
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
An apparatus for detecting traffic information on a street, comprising: a vehicle detector having a detection area on said street and being operable in response to a vehicle in said detection area to produce a detection signal; means for substantially changing the length of said detection area in the direction in which vehicles run on said street in accordance with the traffic condition on said street; and means for providing an output signal proportional to traffic information in response to said detection signal.
Claim 2
Independent Claim
83 words
An apparatus for detecting traffic information on a street, comprising: a vehicle detector having a detection area on said street and being operable in response to a vehicle in said detection area to produce a detection signal; means for substantially changing the length of said detection area in the direction in which vehicles run on said street in accordance with the traffic condition on said street; and means for providing an output signal proportional to traffic information in response to said detection signal.
Claim 3
Dependent Claim
47 words
The apparatus of claim 1, wherein said vehicle detector is provided with a plurality of detecting elements, each of said detecting elements having a respective detection area and said changing means changes the number of said detecting elements that are to be operatively connected to said detector.
Claim 4
Dependent Claim
12 words
The apparatus of claim 1, wherein said changing means is manually operable.
Claim 5
Dependent Claim
21 words
The apparatus of claim 1, wherein said changing means is automatically operable in response to the magnitude of said output signal.
Claim 6
Dependent Claim
17 words
The apparatus of claim 1, wherein said traffic condition is the degree of stagnation on said street.
Claim 7
Dependent Claim
97 words
The apparatus of claim 1, wherein said vehicle detector has a plurality of detecting elements each of said detecting elements having a respective detection area, one on which is always operatively connected to said detector while the others thereof are selectively connectable to said detector, and said detection area length changing means comprises switching means interposed between said detector and said other detecting elements to selectively connect the latter to said detector in addition to said one detecting element, thereby varying the number of detecting elements operatively connected to said detector and consequently said detection area length.
Claim 8
Dependent Claim
48 words
The apparatus of claim 6, wherein said traffic condition is the degree of traffic stagnation on said street, and further including means for producing an operating signal whenever said stagnation has reached a predetermined degree, said operating signal being applied to said switching means to operate the same.
Claim 9
Dependent Claim
25 words
The apparatus of claim 1, wherein said traffic information providing means is means for measuring the time occupancy of said detection area on said street.
Claim 10
Dependent Claim
38 words
The apparatus of claim 6, wherein said respective detection area are of substantially the same length in the direction in which vehicles run along said street and are arranged side by side in said direction on said street.
Claim 11
Dependent Claim
43 words
The apparatus of claim 6, wherein said respective detection areas are different in length in the direction in which vehicles run on said street and are arranged so that each said detection area encloses therein the next smaller one of said detection areas.
Claim 12
Dependent Claim
57 words
The apparatus of claim 1, whereIn said vehicle detector is provided with a plurality of detecting elements having detection areas on said street each different from the others in length in the direction in which vehicles run on said street, and said detection area-length-changing means comprises means for selectively connecting one of said elements to said detector.
Claim 13
Dependent Claim
33 words
The apparatus of claim 1, further including means for compensating the output signal from said traffic information providing means for changes in said detection area when said detection area length has been changed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |