US4188544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatically processing a workpiece employing calibrated scanning
Assignee: APPLIED SCANNING TECHNOLOGY 1988 LEGHORN STREET MOUNTAIN VIEW CALIFORNIA 94043
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Filing: 1977-08-22
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Granted: 1980-02-12
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Expires: 1997-08-22
Abstract
Abstract A system for efficiently scanning and processing a workpiece, particularly logs or pieces cut from logs, wherein the workpiece is first scanned by projecting at least one plane light source at a first angle and detecting the intersection line of the plane of light and workpiece at a second angle. Signals representing points on the intersection line are corrected to compensate for errors in the scanning apparatus to generate signals representing spatial coordinates of the workpiece at the intersection line. The spatial coordinate representing signals are analyzed to generate processing control signals for controlling devices acting on the workpiece, such as automatic sawing equipment.
Inventors
- 👤 Leon H. Chasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:37
CPC Classifications
B; B27; B27B; B27B31/00; B27B31/06; G; G01; G01B; G01B11/00; G01B11/24; G01B11/25; G01B11/2504
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
107 words
A system for processing a workpiece comprising means having a field of view for scanning said workpiece in said field of view to generate signals related to the spatial coordinates of said workpiece, means for converting said signals to processing control signals, said converting means including means for modifying said signals to calibrate said scanning means, said means for modifying including memory means storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, and means for processing said workpiece in accordance with said processing control signals.
Claim 2
Independent Claim
107 words
A system for processing a workpiece comprising means having a field of view for scanning said workpiece in said field of view to generate signals related to the spatial coordinates of said workpiece, means for converting said signals to processing control signals, said converting means including means for modifying said signals to calibrate said scanning means, said means for modifying including memory means storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, and means for processing said workpiece in accordance with said processing control signals.
Claim 3
Dependent Claim
47 words
The combination of claim 1 wherein said means for scanning comprises means for directing a plane of detectable energy at an angle with respect to said workpiece, and means for detecting, at a different angle, the intersection line of said plane of detectable energy and said workpiece.
Claim 4
Dependent Claim
50 words
The combination of claim 2 wherein said means for scanning further comprises further means for directing a plane of detectable energy at an angle with respect to said workpiece, and further means for detecting, at a different angle, the intersection line of said plane of detectable energy and said workpiece.
Claim 5
Dependent Claim
28 words
The combination of claim 2 wherein said means for scanning further comprises means for transporting said workpiece relative to said means for directing and said means for detecting.
Claim 6
Dependent Claim
19 words
The combination of claim 2 wherein said means for detecting generates digital signals representing points of said intersection line.
Claim 7
Dependent Claim
44 words
The combination of claim 5 wherein said means for detecting comprises means for generating analog signals representing the field of view of said workpiece at said different angle, and means receiving said analog signals for generating digital signals representing points of said intersection line.
Claim 8
Dependent Claim
27 words
The combination of claim 6 wherein said calibration information includes a plurality of calibration factors relating, respectively, to zones of said field of view of said workpiece.
Claim 9
Dependent Claim
27 words
The combination of claim 2 wherein said calibration information includes a plurality of calibration factors relating, respectively, to zones of said field of view of said workpiece.
Claim 10
Dependent Claim
27 words
The combination of claim 2 wherein said means for directing comprises a collimated beam laser source and lens means for diverging said beam into a thin plate.
Claim 11
Dependent Claim
27 words
The combination of claim 9 wherein said means for detecting includes a television camera and band pass filter means centered at the frequency of said laser source.
Claim 12
Dependent Claim
14 words
The combination of claim 2 wherein said means for detecting includes a television camera.
Claim 13
Dependent Claim
69 words
The combination of claim 11 wherein said means for detecting includes means for counting at a first rate from the television horizontal sync pulse to the leading edge of a pulse representing said intersection line and for counting at a second rate from the leading edge of said pulse to the trailing edge of said pulse, whereby the pulse peak representing the position of said intersection line is determined.
Claim 14
Dependent Claim
18 words
The combination of claim 1 wherein the system is for processing a log or pieces cut from logs.
Claim 15
Dependent Claim
14 words
The combination of claim 13 wherein said means for processing includes means for sawing.
Claim 16
Dependent Claim
13 words
The combination of claim 13 wherein the system is a slant edger system.
Claim 17
Dependent Claim
22 words
The combination of claim 13 wherein the system is a slant edger system forming a part of a sector wood production system.
Claim 18
Independent Claim
83 words
A method of processing a workpiece comprising scanning said workpiece in a field of view to generate signals related to the dimensions of said workpiece, storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, modifying said signals with said stored calibration information, converting said modified signals to processing control signals, and processing said workpiece in accordance with said processing control signals.
Claim 19
Independent Claim
83 words
A method of processing a workpiece comprising scanning said workpiece in a field of view to generate signals related to the dimensions of said workpiece, storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, modifying said signals with said stored calibration information, converting said modified signals to processing control signals, and processing said workpiece in accordance with said processing control signals.
Claim 20
Independent Claim
78 words
A system for scanning a three-dimensional workpiece comprising means having a field of view for scanning said workpiece in said field of view to generate signals related to the three-dimensional spatial coordinates of said workpiece, and means for modifying said signals to calibrate said scanning means, said means for modifying including memory means storing calibration information derived by comparing scanning signals of a known three-dimensional reference piece with previously stored three-dimensional spatial coordinates of said known reference piece.
Claim 21
Independent Claim
78 words
A system for scanning a three-dimensional workpiece comprising means having a field of view for scanning said workpiece in said field of view to generate signals related to the three-dimensional spatial coordinates of said workpiece, and means for modifying said signals to calibrate said scanning means, said means for modifying including memory means storing calibration information derived by comparing scanning signals of a known three-dimensional reference piece with previously stored three-dimensional spatial coordinates of said known reference piece.
Claim 22
Dependent Claim
47 words
The combination of claim 18 wherein said means for scanning comprises means for directing a plane of detectable energy at an angle with respect to said workpiece, and means for detecting, at a different angle, the intersection line of said plane of detectable energy and said workpiece.
Claim 23
Dependent Claim
50 words
The combination of claim 19 wherein said means for scanning further comprises further means for directing a plane of detectable energy at an angle with respect to said workpiece, and further means for detecting, at a different angle, the intersection line of said plane of detectable energy and said workpiece.
Claim 24
Dependent Claim
28 words
The combination of claim 19 wherein said means for scanning further comprises means for transporting said workpiece relative to said means for directing and said means for detecting.
Claim 25
Dependent Claim
19 words
The combination of claim 19 wherein said means for detecting generates digital signals representing points of said intersection line.
Claim 26
Dependent Claim
44 words
The combination of claim 22 wherein said means for detecting comprises means for generating analog signals representing the field of view of said workpiece at said different angle, and means receiving said analog signals for generating digital signals representing points of said intersection line.
Claim 27
Dependent Claim
27 words
The combination of claim 23 wherein said calibration information includes a plurality of calibration factors relating, respectively, to zones of said field of view of said workpiece.
Claim 28
Dependent Claim
27 words
The combination of claim 18 wherein said calibration information includes a plurality of calibration factors relating, respectively, to zones of said field of view of said workpiece.
Claim 29
Independent Claim
65 words
A method of scanning a workpiece comprising scanning said workpiece in a field of view to generate signals related to the dimensions of said workpiece, storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, modifying said workpiece signals with said stored calibration information.
Claim 30
Independent Claim
65 words
A method of scanning a workpiece comprising scanning said workpiece in a field of view to generate signals related to the dimensions of said workpiece, storing calibration information derived by comparing scanning signals of a known three dimensional reference piece located in said field of view with previously stored spatial coordinates of said known reference piece, modifying said workpiece signals with said stored calibration information.
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) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |