Method and device for measuring wood density of standing tree

Abstract

The invention discloses a method and a device for measuring the wood density of a standing tree, and relates to the technical field of measurement. The method comprises the steps of: measuring the diameter of a part to be measured at a first height from the ground of the standing tree; transmitting and receiving microwaves within a preset frequency range at a first distance in the air; measuring afirst ratio of transmitted microwave signals to first received microwave signals at different frequencies; transmitting microwaves at a first height in the air to allow the microwaves to penetrate the part to be measured of the standing tree, receiving the microwaves at a first distance from the microwave transmitting position, and measuring a second ratio of the transmitted microwave signals tosecond received microwave signals at different frequencies; calculating a dielectric constant and an attenuation constant of the standing tree according to the first ratio, the second ratio and the diameter; and determining a relational expression among the wood density of the standing tree, the dielectric constant and the attenuation constant, and calculating the wood density of the standing treeaccording to the relational expression. By adopting the measurement method disclosed by the embodiment of the invention, the measurement accuracy of the wood density is improved.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a method and a device for measuring the density of standing trees. Background technique [0002] Wood density is an important physical property of standing trees, which is closely related to the mechanical properties of standing trees such as elastic modulus, bending resistance and compression resistance, and wood utilization. It is an important index to evaluate the characteristics of wood quality, grade, strength, etc. It is a common index to study the correlation between the symbolic utilization of standing trees and the cultivation of standing trees, and it is also the basic quantity of biomass measurement in ecosystem research. [0003] In the related art, some researchers measure the volume and quality of the samples after sampling the standing trees, and use the ratio of the mass to the volume to obtain the wood density of the standing trees. After some researchers sa...

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Problems solved by technology

[0005] In order to overcome the problems of the time-consuming method for measuring the density of standing trees in the related art, the damage to the standing trees and the large error in the measurement of wood density, the embodiment of the present invention provides a method and device for measuring the density of standing trees, which reduces the measurement time. The time-consuming and damage to the wood density of the standing tree improves the density measurement range of the whole radial direction of the standing tree and thus improves the accuracy of the measured wood density

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