Device and method for measuring cross-sectional shape of tree trunk, and application

Abstract

The invention belongs to the technical field of forestry testing instruments, and in particular relates to a device and method for measuring cross-sectional shape of a tree trunk, and application. Thedevice comprises a measuring rope, a capacitive grid displacement sensor, an RFID reader and RFID coils, wherein the capacitive grid displacement sensor is made of flexible conductive material; the RFID reader is mounted on the outer surface of the capacitive grid displacement sensor and is located at the midpoint position of the measuring rope; two RFID coils are disposed in the RFID reader; a plurality of RFID coils are disposed inside the measuring rope and are arranged one by one at equal intervals; and the RFID reader is provided with a data processing module to store and calculate the trunk perimeter and the position information of the measuring rope RFID. The device and method for measuring cross-sectional shape of the tree trunk, and the application provided by the invention, based on the principle of RFID phase difference ranging, consider actual growth characteristics of the trunk shape, so that the result of the designed measurement of the cross-sectional shape of the trunkis more practical with fast rate and low cost, and the measurement in the invention can truly meet the accuracy requirements of the measurement in the field conditions.

Description

technical field [0001] The invention belongs to the technical field of forestry testing instruments, in particular to a device, method and application for quickly and accurately measuring the cross-sectional shape of tree trunks. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and it is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] In forestry research, the trunk cross-sectional area of ​​trees is a crucial measurement index. Usually, it is assumed that the cross-section of trees is a standard circle, and the trunk cross-sectional area is estimated by measuring the diameter at breast height. However, the present invention thinks that due to the internal and external Factors, the shape of the tree trunk is diff...

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Problems solved by technology

[0003] In forestry research, the trunk cross-sectional area of ​​trees is a crucial measurement index. Usually, it is assumed that the cross-section of trees is a standard circle, and the trunk cross-sectional area is estimated by measuring the diameter at breast height. However, the present invention thinks that due to the internal and external Factors, the shape of the trunk is difficult to be a standard cylinder, the assumption of a cylinder makes the cross-sectional area overestimated, and it is difficult to achieve an accurate measurement of the cross-sectional area of ​​​​the tree

Due to the above defects, it is necessary to measure the shape of the cross section accurately. The current measurement of the shape of the cross section of the trunk is based on laser scanning. Laser scanning can obtain the shape of the cross section of the trunk very accurately, but the measurement speed of the instrument is relatively slow and the price is relatively high. Expensive, not suitable for large area collection of trunk cross-sectional shape data

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