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US5023712A
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US
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Tracking distance-measuring equipment system with means for setting a window and means for sampling image signals at predetermined time intervals
Assignee: Mitsubishi Electric Corp
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Filing: 1990-03-06
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Granted: 1991-06-11
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Expires: 2010-03-06
Abstract
Abstract A tracking distance-measuring equipment for measuring the distance from a moving target on the principle of triangulation by electrically detecting the respective dislocations of first and second images focused on the image sensors of paired first and second optical systems disposed side by side from the optical axis through the comparison of image signals provided by the image sensors respectively representing the first and second images. A window is set in a specific portion of either the first or second image signal, image signals provided by the image sensors are sampled periodically at predetermined intervals. The sample image signals provided by one of the image sensors are compared with the window set in an image equivalent to the sample image signal provided by the other image sensor at a sampling point. The tracking distance-measuring equipment is capable of continuously measuring the distance from the moving target and determining the direction and distance of movement of the target.
Inventors
- 👤 Yasuya Kajiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:31
CPC Classifications
G; G01; G01C; G01C22/00; G01S; G01S17/00; G01S17/02; G01S17/06; G01S17/46; G01S17/48; G01C3/00; G01C3/02; G01C3/06; G01S11/00; G01S11/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
172 words
A tracking distance-measuring system for measuring a distance from a moving target on the principle of triangulation by electrically detecting a respective dislocation of first and second images individually focused on first and second image sensors (3,4) by first and second juxtaposed optical systems (1,2) and comparing corresponding first and second image signals provided by the image sensors, said tracking distance-measuring system comprising: means for setting a window in a specific portion of either the first or second image signal; means for determining the distance from the moving target by comparing the first and second image signals on the basis of an image signal in the window; and means for sampling the image signals periodically at predetermined time intervals for comparing the image signal within the window set at a sampling point and an image signal at the next sampling point to set a new window in a portion of the image signals best coinciding with each other for determining the direction and distance of movement of the target from a variation.
Claim 2
Dependent Claim
172 words
A tracking distance-measuring system for measuring a distance from a moving target on the principle of triangulation by electrically detecting a respective dislocation of first and second images individually focused on first and second image sensors (3,4) by first and second juxtaposed optical systems (1,2) and comparing corresponding first and second image signals provided by the image sensors, said tracking distance-measuring system comprising: means for setting a window in a specific portion of either the first or second image signal; means for determining the distance from the moving target by comparing the first and second image signals on the basis of an image signal in the window; and means for sampling the image signals periodically at predetermined time intervals for comparing the image signal within the window set at a sampling point and an image signal at the next sampling point to set a new window in a portion of the image signals best coinciding with each other for determining the direction and distance of movement of the target from a variation.
Claim 3
Dependent Claim
185 words
A tracking distance-measuring system for measuring a distance from a moving target on the principle of triangulation by electrically detecting a respective dislocation of first and second images individually focused on first and second image sensors (3,4) by first and second juxtaposed optical systems (1,2) and comparing corresponding first and second image signals provided by the image sensors, said tracking distance-measuring system comprising; means for setting a window in a specific portion of either the first or second image signal; means for determining the distance from the moving target by comparing the first and second image signals on the basis of an image signal in the window; and means for sampling the image signals periodically at predetermined time intervals, comparing the image signal within the window set at a sampling point and a specific portion of an image signal sampled at the next sampling point corresponding to the moving velocity of the target, and setting a new window in a portion of the image signal best coinciding with the previous window for determining the direction and distance of movement of the target from a variation.
Claim 4
Dependent Claim
185 words
A tracking distance-measuring system for measuring a distance from a moving target on the principle of triangulation by electrically detecting a respective dislocation of first and second images individually focused on first and second image sensors (3,4) by first and second juxtaposed optical systems (1,2) and comparing corresponding first and second image signals provided by the image sensors, said tracking distance-measuring system comprising; means for setting a window in a specific portion of either the first or second image signal; means for determining the distance from the moving target by comparing the first and second image signals on the basis of an image signal in the window; and means for sampling the image signals periodically at predetermined time intervals, comparing the image signal within the window set at a sampling point and a specific portion of an image signal sampled at the next sampling point corresponding to the moving velocity of the target, and setting a new window in a portion of the image signal best coinciding with the previous window for determining the direction and distance of movement of the target from a variation.
Claim 5
Dependent Claim
60 words
A tracking distance-measuring system for measuring a distance from a moving target as claimed in claim 2, wherein a region for comparing a reference image signal in the window with either the first or second image signal is specified in accordance with the moving velocity of the target on the basis of the distance determined at the preceding sampling point.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-10 | 1994-12-10 | 1995-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-10 | 1998-12-10 | 1999-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-10 | 2002-12-10 | 2003-06-11 | $7700.00 | Window Closed / Lapsed |