Method and device for evaluating a wooden board

US9863929B2 · kind B2 · utility

Assignee

• WOODEYE AB · SE

Inventors

• Anders Olsson · Staffanstorp, SE
• Erik Serrano · Lund, SE
• Jan-Erik Oscarsson · Boo, SE
• Bertil Enquist · Handen, SE
• Marie Johansson · Göteborg, SE
• Bo Källsner · Bissenkamp, SE

Key dates

• Filing date: Mar 7, 2013
• Grant date: Jan 9, 2018
• Expiry date: Sep 12, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2201/105
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The present disclosure relates to a method and device for evaluating a wooden board with an elongated direction. Data indicating fiber orientation over the surface of the board is acquired and for a number of board sub-portions a nominal local modulus of elasticity, MOE, is determined based on the fiber orientation data and a nominal material parameter. A nominal global MOE in the elongated direction for the wooden board as a whole is generated and compared with a secondary global MOE. Based on the fiber orientation data and this comparison an estimated local modulus of elasticity, MOE, in said elongated direction is generated for a number of board sub-portions. This data may be used e.g. for reliable strength grading of wooden boards.