Sawn timber grading device and method

Abstract

The invention discloses a sawn timber grading device and method. An image acquisition unit in the device is used for acquiring images of all angles of sawn timber; a center control machine is used forcalculating the volume of the sawn timber according to the images and judging whether knots on the surface of the sawn timber meet preset conditions according to the images; a first allocating machine is used for allocating unqualified sawn timber having knots nonconforming to the preset conditions out and retaining qualified sawn timber; a weighing sensor is used for measuring the weight of thequalified sawn timber; a moisture content detection device is used for detecting the moisture content of the qualified sawn timber; a sawn timber stress grader is used for detecting the elastic modulus of the qualified sawn timber; the center control machine is also used for determining the density of the sawn timber according to the volume and mass, and determining the grade of the sawn timber according to the density, moisture content, elastic modulus and knot parameters; a second allocating machine is used for allocating all grades of the qualified sawn timber to corresponding conveying belts. The sawn timber grading device and method provided by the invention can improve the accuracy of grading of the sawn timber.

Description

technical field [0001] The invention relates to the technical field of sawn timber processing for wooden structures, in particular to a sawn timber grading device and method. Background technique [0002] The development of prefabricated wooden buildings is a major change in the construction of green and low-carbon buildings. The main structure of the prefabricated wood structure building is a building assembled on site by prefabricated components such as beams, columns, supports, trusses, and wooden load-bearing walls. One of the core unit materials for the prefabricated components used in the prefabricated wood structure building is saw material. Sawn lumber is a standard lumber processed with a set size for the width and height of the sawn timber section according to the design requirements of the prefabricated wood structure building. Its mechanical properties directly affect the safety and quality of the prefabricated wood structure building. According to the design r...

AI Technical Summary

Problems solved by technology

Because visual grading is greatly affected by subjective factors, its grading accuracy is low, and mechanical stress grading can only detect stress conditions without considering the impact of sawn timber appearance. With the increasing consumer demand of consumers, enterprises not only require The mechanical properties of sawn timber meet the construction standards, and at the same time, there are increasingly higher requirements for the appearance of sawn timber, so mechanical stress classification will not be able to meet all the needs of wood structure enterprises in the future

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