Timber drying stress detection device and method

Abstract

Stress detection equipment and method in wood dryness process. It relates to a kind of wood detection equipment and method. Aim to the problem that the laminar section-cutting method, the hackle method, the tile bend method can not detect directly and continuously, and it can not fix quantify test directly, its test accuracy is hard to assure. The instrument is: the tension stress sensor is fixed in the clamp, the tension stress sensor links with the modules convertor, the modules convertor links with the computer; the method is: fixes the wood sample in the clamp and dries it, when the wood sample shrinks and distorts, it produces shrink stress because of being restrained, and inputs it in the modules convertor to convert into digital signals through the analog signals of the tension stress sensor, then inputs in the computer test the stress in the dry process of the wood sample updating and continuously. Using the instrument and method in this invention can test the shrink stress in the dry process of the wood directly, updating and continuously.

Description

technical field [0001] The invention relates to a wood detection device and method. Background technique [0002] Wood drying stress is the main parameter and basis for researching and formulating wood drying process benchmarks. However, due to the variability and complexity of wood itself, it has brought many difficulties and inconveniences to the testing of wood drying stress. So far, how to quickly and accurately Testing wood drying stress is still a big problem for wood scientists. In the 1950s, Mc.Millen first proposed a method for measuring the drying stress of wood - the layered slice method. Tooth profile method, for qualitative research on drying stress, is mainly used in drying practice. In 1972, Shigeru Nishio proposed a method for determining the drying stress of wood by the tile bending method. In the past two decades, with the introduction of some new testing instruments and technologies into the field of wood drying research, some new wood drying stress tes...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a stress detection device and method in the drying process of wood, which can solve the problem that methods such as layered slicing method, comb tooth method and tile bending method cannot be directly and timely measured continuously, and cannot be quantified directly. It is difficult to guarantee the test and test accuracy

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