CA2599472A1 - Method and apparatus for scanning lumber and other objects - Google Patents
Method and apparatus for scanning lumber and other objects Download PDFInfo
- Publication number
- CA2599472A1 CA2599472A1 CA002599472A CA2599472A CA2599472A1 CA 2599472 A1 CA2599472 A1 CA 2599472A1 CA 002599472 A CA002599472 A CA 002599472A CA 2599472 A CA2599472 A CA 2599472A CA 2599472 A1 CA2599472 A1 CA 2599472A1
- Authority
- CA
- Canada
- Prior art keywords
- board
- zone
- location
- projected
- predicted
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Abstract
Disclosed herein are TV Camera based and other electro-optical sensors and systems, providing affordable methods and apparatus for high speed determination of dimensions and other features of objects. Particular embodiments capable of fast and reliable acquisition of features of moving objects such as boards and wood products are disclosed. Preferred embodiments utilize laser triangulation range detection with at least two cameras viewing the same laser spot or line projected on the object.
Claims (10)
1. An improvement in measuring boards on a conveyor using optical triangulation sensors, comprising the steps of:
projecting a zone of light on said board;
predicting data relating to the likely location of the board surface, and therefore the image of the zone on the board; and imaging said zone with a TV camera having a photo-detector array which can be addressed such that the pixels of the array which are interrogated are those in the vicinity of the expected location of the image of the zone, given said predicted board surface location.
projecting a zone of light on said board;
predicting data relating to the likely location of the board surface, and therefore the image of the zone on the board; and imaging said zone with a TV camera having a photo-detector array which can be addressed such that the pixels of the array which are interrogated are those in the vicinity of the expected location of the image of the zone, given said predicted board surface location.
2. A method according to claim 1 wherein said projected zone is a spot.
3. A method according to claim 1 wherein a plurality of said zones are projected and imaged by said TV camera.
4. A method according to claim 1 wherein said projected zone is a line.
5. A method according to claim 1 wherein said light is projected by a laser.
6. A method according to claim 1, wherein said predicted location is substantially near where the previous detected location was.
7. A method according to claim 1, wherein said predicted location is substantially near where one would assume given the nominal dimensions of the board.
8. A method according to claim 1, wherein said predicted location is substantially near where one would assume given the dimensions of a previously measured board.
9. A method according to claim 1 wherein the shape of an edge of the board is measured.
10. A method according to claim 1 wherein data on curved edges is reconstructed by interpolation or extrapolation of other data taken.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22701700P | 2000-08-23 | 2000-08-23 | |
| US60/227,017 | 2000-08-23 | ||
| CA 2355756 CA2355756C (en) | 2000-08-23 | 2001-08-23 | Method and apparatus for scanning lumber and other objects |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2355756 Division CA2355756C (en) | 2000-08-23 | 2001-08-23 | Method and apparatus for scanning lumber and other objects |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2599472A1 true CA2599472A1 (en) | 2002-02-23 |
| CA2599472C CA2599472C (en) | 2011-04-19 |
Family
ID=38653250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2599472A Expired - Lifetime CA2599472C (en) | 2000-08-23 | 2001-08-23 | Method and apparatus for scanning lumber and other objects |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2599472C (en) |
-
2001
- 2001-08-23 CA CA2599472A patent/CA2599472C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2599472C (en) | 2011-04-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20210823 |