Electronic angle gauge tree surveying apparatus and automatic tree survey method

A technology of dendrometer and angle gauge, which is applied in the field of forest resources sampling survey, can solve the problems of unable to store, transmit and process image information, troubles and errors, etc.

Inactive Publication Date: 2005-11-23
BEIJING FORESTRY UNIVERSITY
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  • Abstract
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Problems solved by technology

However, the instrument is a pure optical system, which can only rely on manual observation and judgment, and it cannot store, transmit and process the collected image information in real time
Therefore, it inevitably brings a lot of trouble and errors

Method used

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  • Electronic angle gauge tree surveying apparatus and automatic tree survey method
  • Electronic angle gauge tree surveying apparatus and automatic tree survey method
  • Electronic angle gauge tree surveying apparatus and automatic tree survey method

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Embodiment Construction

[0025] When using an electronic angle gauge to measure around, two people are required to cooperate. One person holds the instrument and places it on the point of the angle gauge; the other person holds the horizontal ruler and places it at the DBH of the standing tree to be measured. When measuring around image 3 shown. First issue the "Start" command, and input the angle regular constant F (0.5, 1, 2, 4) and the vertical angle α a , Auxiliary high vertical angle α b , and follow the prompts. Starting from the i-th plant, the first step is to aim at the chest height. In the upper half of the field of view, you can see the fine and accurate images of tree DBH and horizontal scale scale; in the second half of the field of view, you can see the line of sight slope θ at this time i (Vertical angle scale) and the image of the degree to which the reticle of the angle rule F cuts the diameter at breast height. After shooting, the CCD of the camera digitizes the image, and inp...

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Abstract

The invention discloses an electronic angle gauge tree measuring instrument and an automatic tree measuring method. The instrument is a combination of an optical angle gauge and a digital camera. It places the CCD area array (photoelectric converter) ② of the digital camera on the focal plane of the optical square gauge. Therefore, the image light signals collected by the telescopic system ① and the microscopic system ③ are digitized after being converted into electronic signals by the CCD. Then it is transmitted to the database through the data communication cable to realize the automation of information collection and recording. The tree measuring method is a combination of the electronic angle gauge tree measuring process and computer technology. With the cooperation of the electronic angle gauge dendrometer, the measurement, judgment and calculation of the tree measurement process are fully automated through the angle gauge tree measurement software, which enables the synchronization of the outside and the industry, which can greatly improve work efficiency and reduce labor intensity. In particular, the stand volume can be obtained without measuring the average height of the stand, which overcomes the difficulties of overlapping tree crowns and poor visibility in the forest, and can further improve the practicability of measuring trees with angle gauges, and has broad market prospects.

Description

technical field [0001] The invention relates to an instrument and a method for sampling investigation of forest resources, in particular to an electronic angle gauge dendrometer and an automatic tree measuring method for sampling surveys of forest resources. Its feature is that it can estimate fairly accurate standing volume or stand volume without measuring the tree height of standing trees or the average height of stands, and it can realize the automation from information collection to information processing in the whole tree measuring process. It can provide decision-making basis for rational management and sustainable development of forest resources. Background technique [0002] 1 Theory and method [0003] The theory of measuring trees with angular gauge was first created by Austrian forester Bitterlich, W. in 1947. In 1952, American scholar Grosenbaugh, L.R., based on probability theory, further clarified from the perspective of sampling that angular gauge point sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B21/00G01B21/02
Inventor 冯仲科徐祯祥杰林德・罗斯纳尔
Owner BEIJING FORESTRY UNIVERSITY
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