Wood moisture content detection method based on radar waves

Abstract

The invention discloses a wood moisture content detection method based on radar waves. The wood moisture content detection method overcomes such shortcoming of the conventional weighing method as complicated detection process and is a real-time, continuous and lossless moisture content detection method. When the radar waves are transmitted in wood, the transmission speed, the amplitude intensity, the reflection time and the like of the radar waves are affected due to difference of dielectric constants in the wood, and the dielectric constants in the wood are closely relevant to the moisture content of the wood. The detection method comprises the steps of mounting a radar antenna (containing a radar wave emitting and receiving device, wherein the radar wave frequency is 900Mhz, and the wood which is 1m thick can be detected), a data manager (which can digitalize and store the radar waves emitted and reflected by the radar antenna for analysis and research), and a wood relative dielectric constant and moisture content relation model; emitting the radar waves to the wood with the known thickness through the radar antenna, collecting the reflected waves, calculating the double-journey traveling time of the radar waves in the wood through the data manager, calculating a relative dielectric constant of the wood, and obtaining the moisture content of the wood according to the wood relative dielectric constant and moisture content relation model.

Description

technical field [0001] The invention relates to a method for detecting the moisture content of wood based on radar waves, which provides a non-destructive moisture content of wood in a practical sense to relevant workers in the maintenance of ancient trees and wooden beams and columns of ancient buildings, wood drying and processing, and wooden furniture making. Detection method. Background technique [0002] The drying of wood is particularly important in wood processing enterprises, and the moisture content of wood in the wood drying process is a very critical parameter. The real-time online detection of wood moisture content during the drying process is an important link to improve the drying quality of wood, shorten the drying cycle, and reduce drying costs. Similarly, the moisture content of wood is also used in the maintenance of wooden beams and columns in ancient buildings, the production of wooden furniture, and the use of geothermal wood floors. important indicato...

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Problems solved by technology

However, the resistance method is generally more accurate when it is between 6% and 30%, and it cannot realize continuous online detection of moisture content at high moisture content

This method is a contact measurement method. When measuring, a stainless steel probe needs to be nailed into the wood, which will damage the wood more or less, and also increase the cumbersome measurement. It is not suitable for the measurement of wooden beams and columns of ancient buildings and wooden furniture.

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