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Standing tree comprehensive detection device based on intelligent fusion technology

A comprehensive detection and technology technology, applied in the field of machine vision technology and tree detection, can solve problems such as the inability to guarantee the laser beam and the trunk, the diameter error of the standing tree, and the failure of the detection method.

Inactive Publication Date: 2013-01-16
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, in actual measurement, it cannot be guaranteed that the laser beam is perpendicular to the trunk. If the laser beam is not perpendicular to the trunk, the laser beam is actually an elliptical spot on the trunk. In this case, the spot is treated as a circle, and the detected standing tree diameter will produce a large error, resulting in the failure of this detection method

Method used

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  • Standing tree comprehensive detection device based on intelligent fusion technology
  • Standing tree comprehensive detection device based on intelligent fusion technology

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Embodiment Construction

[0009] The embodiment will be further described below in conjunction with the accompanying drawings. Based on the comprehensive detection device for standing trees based on information fusion technology, the base (9) is adjusted to observe the level (8) to keep the base (9) level, and the laser beam is irradiated to the On the trunk (10) that needs to measure the tree diameter, the laser spot is elliptical, and the image of the trunk at the position of the laser spot is taken with a video camera (3), and the actual size of the laser spot is used as a scale, according to the pixel of the short axis of the laser spot in the image Measure the diameter of the tree, the method is carried out in the following steps,

[0010] (1) After the beam emitted by the laser is collimated and expanded, the beam with a diameter of d mm is irradiated on the trunk where the diameter of the tree needs to be measured. Since the laser beam is not perpendicular to the trunk, the laser spot irradiated ...

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Abstract

The invention discloses a standing tree comprehensive detection device based on the intelligent fusion technology. A laser beam subject to collimation and beam-expanding is irradiated on a trunk (10) with the tree diameter required for measurement, a camera (3) is used for shooting the image of the trunk, where a laser light spot is arranged, the actual size of the laser light spot serves as a scale, the tree diameter can be measured as per pixel number of the laser light spot in the image, an encoder (5) is used for measuring the rotating angle of the laser beam, the straight-line distance between a vertical rod (7) and the trunk (10) can be measured through a laser rangefinder (4), and the height of the trunk can be calculated out as per the geometric relationship.

Description

technical field [0001] The invention belongs to the field of machine vision technology and tree detection technology, and in particular relates to a device for comprehensive detection of standing trees by using laser ranging and machine vision technology. Background technique [0002] Machine vision is a comprehensive technology that integrates digital image processing, machinery, control, optics, computer and other technologies. The machine vision system can realize non-contact detection of the target, can quickly obtain a large amount of information, and is easy to process automatically. Wide range of applications. [0003] In the survey of forest resources, the measurement of tree diameter and tree height is very important. When measuring the diameter of a single standing tree in China, most of them rely on the operator to measure the circumference of the tree with a tape measure, and then calculate the diameter of the tree, or use the same method of marking the scale o...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01B11/08
Inventor 程朋乐刘晋浩李晓慧
Owner BEIJING FORESTRY UNIVERSITY
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