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Method and device for measuring forest canopy density

A technology of forest canopy density and measurement method, which is applied in the forestry field, can solve problems such as inaccurate forest canopy density, loss of echo signals, failure of laser radar system to receive successfully, etc., and achieve calculation amount and correction complexity control, Improve accuracy, convenient and quick correction effect

Active Publication Date: 2018-01-30
RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The inventor found in the process of realizing the present invention that the laser radar system cannot successfully receive the echo signals of all laser pulses emitted by it due to reasons such as the laser pulse transmission distance, that is, there is a phenomenon of echo signal loss; The echo signal of may be the echo signal based on the loss of the forest canopy, or the echo signal based on the ground loss. Therefore, the ratio of the number of echo signals from the forest canopy to the total number of echo signals is used to determine When the forest canopy density is measured, the measured forest canopy density will be inaccurate

Method used

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  • Method and device for measuring forest canopy density
  • Method and device for measuring forest canopy density
  • Method and device for measuring forest canopy density

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Embodiment 1

[0020] Embodiment one, the measuring method of forest canopy density.

[0021] Combine below figure 1 The method for measuring the forest canopy density in this embodiment will be described in detail.

[0022] figure 1 Be the flow chart of the measurement method of the forest canopy density of the present embodiment, and figure 1 The shown method mainly includes: step S100, step S110, step S120 and step S130. figure 1 The shown method can generally be executed in an intelligent electronic device (such as a computer or a server or a smart mobile phone) with data processing capabilities, and this embodiment does not limit the hardware environment to which the method is applicable. next to figure 1 Each step in is explained separately.

[0023] S100. Obtain the forest canopy density to be corrected.

[0024] Specifically, this embodiment can obtain the forest canopy density to be corrected in a variety of ways. Usually, the information released by some existing products con...

Embodiment 2

[0081] Embodiment two, the measuring device of forest canopy density.

[0082] figure 2 It is the schematic diagram of the measuring device of the forest canopy density of the present embodiment, and figure 2 The shown measuring device for forest canopy density mainly includes: a first acquisition module 200 , a second acquisition module 210 , a third acquisition module 220 and a correction module 230 .

[0083] figure 2 The shown apparatus can generally be executed in an intelligent electronic device (such as a computer or a server or a smart mobile phone) capable of data processing, and this embodiment does not limit the hardware environment to which the apparatus is applicable. next to figure 2 Each module in is explained separately.

[0084] The first acquisition module 200 is mainly used to acquire the forest canopy density to be corrected.

[0085] Specifically, the first acquisition module 200 can acquire the forest canopy density to be corrected in various way...

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Abstract

The invention relates to a measuring method of the forest canopy density and a device. The method mainly comprises steps of obtaining the to-be-corrected forest canopy density; obtaining the laser radar echo loss rate corresponding to the forest canopy density; obtaining the forest canopy echo scale factor and the ground echo loss rate, wherein the forest canopy echo scale factor is represented by the proportional relation between the echo signal quantity of the forest canopy and the echo signal quantity of vegetation; and obtaining the corrected forest canopy density according to the to-be-corrected forest canopy density, the laser radar echo loss rate, the forest canopy echo scale factor, the ground echo loss rate and the formula shown in the description, wherein the CCM is the corrected forest canopy density, the CC1 is the to-be-corrected forest canopy density, the k is the forest canopy echo scale factor, the RL is the laser radar echo loss rate and the RLG is the ground echo loss rate. According to the invention, the forest canopy density can be corrected easily and quickly and accuracy of the forest canopy density is effectively improved.

Description

technical field [0001] The invention relates to the technical field of forestry, in particular to a method for measuring forest canopy density and a measuring device for forest canopy density. Background technique [0002] Forest canopy density usually refers to the ratio of the vertical projected area of ​​the canopy in the forest to the area of ​​the forest. Forest canopy density is often expressed in tenths. [0003] At present, lidar is usually used to measure forest canopy density. The specific measurement process is usually: use the laser radar system to emit laser pulses, and the laser radar system can receive the echo signals of the emitted laser pulses, and measure the echo signals from the forest canopy and all echo signals , and calculate the ratio of the number of echo signals from the forest canopy to the total number of echo signals according to the measurement results to obtain the forest canopy density. [0004] The inventor found in the process of realizi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/48
CPCG01S7/4802
Inventor 刘清旺李增元陈尔学庞勇李世明
Owner RES INST OF FOREST RESOURCE INFORMATION TECHN CHINESE ACADEMY OF FORESTRY