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Method for measuring wood volume of stumpage by using novel breast height form factor

A chest height and wood technology, applied in the field of trunk volume measurement by the new chest height shape number method, can solve the problems of unsatisfactory accuracy and many parameters to be measured, and achieve the effect of fast and high-precision measurement

Inactive Publication Date: 2014-05-14
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

Improve the calculation speed and accuracy of the trunk volume, overcome the defects of many parameters to be measured and unsatisfactory accuracy involved in the measurement of the trunk volume in the past

Method used

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  • Method for measuring wood volume of stumpage by using novel breast height form factor
  • Method for measuring wood volume of stumpage by using novel breast height form factor

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Embodiment Construction

[0013] The method of measuring the volume of standing trees based on the new chest height shape number based on the electronic theodolite is different from the existing method, specifically in that:

[0014] 1. Design a new type of standing timber volume V = π 4 a 1 d 1.3 2 H , reference cylinder new breast height The formula for calculating the volume of standing timber can be derived In the formula, d 1.3 is the diameter of the standing tree at breast height, H is the height of the standing tree, a 1 、a 2 , b 1 , b 2 is a constant;

[0015] 2. Select standard standing trees of various tree species and diameter classes, with at least 10 trees for each tree species and each diameter class. The tree height, diameter at breast height, and volume are measured and calculated using the electronic theodolit...

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Abstract

The invention relates to a method for measuring a wood volume of stumpage by using a novel breast height form factor. The method for measuring the wood volume of the stumpage by using the novel breast height form factor uses an electronic theodolite as a tool to design the novel breast height form factor, the wood volume, the diameter at breast height and the height of the stumpage are measured through the electronic theodolite, parameters in a novel breast height form factor model and a wood volume model are determined, and the wood volume of the stumpage can be rapidly determined according to the models. The method for measuring the wood volume of the stumpage by using the novel breast height form factor improves the calculation speed and accuracy of the wood volume of the stumpage, and overcomes the defects that the parameters involved in traditional calculation and measurement of the wood volume of tree trunks are many and the accuracy is not ideal.

Description

1. Technical field [0001] The invention relates to a method for measuring the volume of a standing tree by using a new breast height shape number method, in particular to a new type chest height shape number method for trunk volume measurement using an electronic theodolite as a tool. 2. Technical background [0002] There are many traditional tree volume measurement methods, most of which are based on the trunk curve derived from the Kunz trunk curve, using the average cross-sectional area approximate quadrature formula, the central cross-sectional area approximate quadrature formula, and Newton’s approximate quadrature formula and other publicity and models to measure the felled trees. Perform differentiation and quadrature. In order to obtain the standing timber volume, formulas such as shape number and shape ratio are introduced for calculation. These methods have numerous disadvantages. Although the accuracy of calculating the standing volume of felled trees is high, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/00
Inventor 冯仲科高祥
Owner BEIJING FORESTRY UNIVERSITY
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