Method for measuring moisture content gradient in drying process of woods and measuring sensor used for the method

Abstract

The invention relates to a method for measuring moisture content gradient in a drying process of woods and a measuring sensor used for the method. The method for measuring moisture content gradient in the drying process of woods includes: in the drying process of the woods, inserting a measuring sensor into the woods for measuring resistance within a certain distance in the width direction of two different-thickness layers of the woods on line, calculating the moisture content rate of the different-thickness layers of the woods according to the resistance and then calculating the moisture content gradient of the woods according to the moisture content ratio and the distance between the different-thickness layers. Due to the method, in the drying process of the woods, operating staff can calculate the moisture content gradient and moisture content deviation on the thickness by measuring the moisture content ratio of the two-layer or multiple-layer woods on line on the basis of easy and safe operation, softness or hardness of drying standard can be judged according to the moisture content gradient, temperature and humidity of the drying medium can be adjusted timely, and accordingly the aim for improving drying quality and shortening drying cycle can be achieved.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a method for testing the moisture content gradient in the drying process of wood and a used testing sensor. Background technique [0002] At present, during the drying process of wood, especially for the drying process of thick boards, the phenomenon of large deviation of moisture content in the thickness of wood always exists. After drying, although the moisture content of the wood tested by the moisture content meter has met the requirements, due to the large deviation of the moisture content on the thickness of the wood, the moisture content of the wood core layer is higher than the moisture content of the wood surface layer, so that the wood is in use. During the process, due to the need to further balance the moisture content of the wood, the wood will deform or the wood surface will collapse, especially for the surface of the glulam under the "thick and wide" produc...

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Problems solved by technology

The test time takes nearly 24 hours to get the result, which has a hysteresis; at the same time, the location of the stress test board is generally located at the small door of the drying kiln because of its easy access, where the drying speed is the fastest, and the moisture content deviation in the thickness of the wood here cannot The moisture content deviation represents the thickness of the whole pile of wood in the drying kiln, and the operation is complicated; in addition, the drying kiln operators need to enter the kiln to take the inspection board during the drying process, which poses a threat to the personal safety of the drying kiln operators

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