Temperature control device for measurement on modulus of elasticity in static bending of wood

Abstract

The invention discloses a temperature control device for measurement on modulus of elasticity in static bending of wood, and provides an automatic temperature setting, controlling and stabilizing device and an automatic temperature setting, controlling and stabilizing method for a process of measurement on modulus of elasticity in static bending of wood. The problem that the temperature of wood is changed over fast and is balanced difficultly in the traditional measurement on the modulus of elasticity in static bending of wood is solved. The temperature control device comprises a temperature control box, a temperature control unit, a temperature monitoring unit, a unit for measuring the modulus of the elasticity in static bending of the wood and a liquid carbon dioxide delivery unit, wherein the temperature control box is a closed temperature circulating device, and has a thermal insulation effect and a cold insulation effect; an small electric fan, an electric heating bar, a wood sample, a metal roller for supporting the wood sample and a copper wire tube for delivering carbon dioxide are distributed in the temperature control box; the wood sample is cooled down by delivery of the carbon dioxide and running of the fan; thermocouples distributed at two different positions of the wood sample are connected with the temperature monitoring unit, so that the change of the temperature of the wood can be monitored; and the small electric fan and the electric heating bar are connected with the temperature control unit, so that the environment temperature in the temperature control box can be adjusted.

Description

technical field [0001] The invention relates to a temperature controllable device and method for measuring wood bending elastic modulus, which can accurately control and stabilize the testing temperature of wood samples. Background technique [0002] The flexural modulus of wood is one of the important mechanical properties of wood and an important criterion for evaluating the quality grade of wood. Some studies have shown that the flexural elastic modulus of frozen and non-frozen wood is significantly different, and there are also differences in the flexural modulus of wood with different degrees of freezing, thus indicating that temperature has a certain influence on the mechanical properties of wood. The traditional temperature influence test of wood bending elastic modulus is through the refrigerator or ice cellar. After the wood sample is frozen to a certain temperature, it is taken to room temperature for bending elastic modulus testing. [0003] The technical problem...

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Problems solved by technology

[0004] The invention realizes a temperature-controllable device and test method for measuring the bending elastic modulus of wood, realizes the control and stability of the wood temperature of small samples in the process of measuring the bending elastic modulus of wood, and solves the problem of wood bending in the existing research. The problem of difficult temperature positioning in elastic modulus measurement

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