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Electronic angle gauge tree surveying apparatus and automatic tree survey method

A tree measuring instrument and angle gauge technology, applied in the field of forest resources sampling survey, can solve problems such as troubles and errors, inability to store, transmit and process image information.

Inactive Publication Date: 2005-01-26
BEIJING FORESTRY UNIVERSITY
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  • Abstract
  • Description
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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

[0034] The software of automatic tree measuring method consists of two parts: automatic observation system and automatic calculation system. The former includes a digital photogrammetry data processing system and cooperates with the instrument.

[0035] 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. Around the side such as 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...

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Abstract

This invention discloses an automatic method of tree measuring and an electronic angle gage device for tree measuring that comprises optical angle gage and digital camera and locates the CCD surface (optical-to-electric transducer) (2) on the focal surface of the optical angle gage. So the image optical signal collected by telescope system and microsystem is transformed into electronic signal and is digitalized. And the signals are imported into database through communication cable, which can realize the information collecting and automatic recording. The said method is the combination of the process of tree measuring by the electronic angle gage and computer techniques. With the aid of the electronic tree-measuring device, it can realize the measuring, judging and total automatic calculation through the angle gage tree-measuring software to accomplish outdoor and indoor work synchronously and increases the working efficiency and lower intensity of labor.

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 unequal 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 po...

Claims

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Application Information

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Patent Type & Authority Applications(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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