Log scanner
US5023805A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1988 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Sep 28, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/419
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of analyzing a body (log) containing elements (e.g. knots) having different densities than the remainder of the body by passing electromagnetic energy from at least one source for substantially symmetrical bodies (pruned logs) or at least two sources through the body and sensing the amount of energy passing through the body from each source by sensors mounted opposite each source. Each sensor is formed by an array of discrete detectors positioned in side by side relationship opposite their respective sources. The amount of radiation passing through the body is detected as the body passes between the source(s) and its (their) respective detector(s) and a longitudinal plan is generated based on the radiation detected from each of the sensors over at least a preselected length of the body. For non-symmetrical bodies the longitudinal plans are then analyzed to identify the same element in each of the plans and then the body is reconstructed in a plurality of cross sections representing discrete lengths of the body shorter than the selected length with the detected elements positioned in the cross section. A longitudinal axis of the body is selected based on the shape of the bo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.