Unmanned-aerial-vehicle-based tree walk measuring device and tree walk measuring method

Abstract

The invention discloses an unmanned-aerial-vehicle-based tree walk measuring device and tree walk measuring method. The measuring device comprises an unmanned aerial vehicle, a remote controller, anda computer that carry out data transmission in a wireless communication manner. The unmanned aerial vehicle is provided with a GPS, an IMU, an ultrasonic sensor, a camera, a microcontroller and a laser radar. In addition, the tree walk measuring method includes: a metal tag with a serial number is fixed at each tree; an automatic flight path of an unmanned aerial vehicle is set to carry out tag scanning and tree walk detection; scanned point cloud data are projected to obtain a two-dimensional planar discrete point map; according to a density-based clustering method, discrete points of a trunkare identified; and circular fitting is carried out on the discrete points to obtain a tree walk value and the tree walk value and the serial number of the tag are inputted into a database together.According to the invention, the tree walk value can be measured quickly and accurately in a non-contact manner; and a tree resource database is established based on serial numbers of tags, thereby providing the support for tree resource measurement and data comparison in future. The measuring flow is simple and is operated conveniently; and the work efficiency is improved substantially.

Description

technical field [0001] The invention relates to the technical field of measurement, in particular to a tree diameter measurement device and a tree diameter measurement method based on an unmanned aerial vehicle. technical background [0002] my country will carry out inventory work on forest resources on a regular basis to accurately check the quantity, quality and growth of forest resources across the country and in various provinces and cities. Among them, the growth density and tree diameter of forest trees are the basic parameters for the study of forest resources, and are an extremely important survey content. The traditional method of measuring the tree diameter is to rely on manual estimation of the height of the tree at 1.3m, measure the circumference by measuring the diameter of the tree, and calculate the diameter of the tree by the formula of circle diameter and circumference or use a caliper to measure the diameter of the tree. However, this traditional measurem...

AI Technical Summary

Problems solved by technology

However, this traditional measurement method is not only inefficient, but also wastes a lot of manpower and material resources.

At this stage, the investigation of forest timber resources is carried out in the form of sampling. Although sampling surveys can save some manpower and material resources, there are still shortcomings of time-consuming and labor-intensive.

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