Portable forest height measurement sampler

Abstract

The invention discloses a portable forest height measurement sampler, and relates to the technical field of measurement machinery, the portable forest height measurement sampler comprises a base and a lifting rod, the top end of the lifting rod is provided with a detachable sampling assembly, and the sampling assembly is composed of a fixed plate, a motor A, a rotating plate, a power assembly, a sampling assembly I and a sampling assembly II; and the fixed plate is detachably fixed to the top end of the lifting rod through a screw. The height of a tree can be measured through cooperative use of the lifting rod and a scale plate, meanwhile, an infrared detector can detect the height of the tree through ultraviolet rays and transmit data to the controller, the measured data are more accurate, and the device is complete in sampling through cooperative use of the sampling assembly I and the sampling assembly II; and the sampling assembly I and the sampling assembly II can move, so that an operator can conveniently carry out sampling work, collection is completed in the sampling process, the practicability is high, height measurement and various sampling requirements can be met at a time, and the working efficiency of the operator is improved.

Description

technical field [0001] The invention relates to the technical field of surveying machinery, in particular to a portable forest altimetry sampler. Background technique [0002] Tree height is an important factor of forest stand, it is not only the quantitative index of forest stand but also the quality index of forest stand; it is the most important measurement factor in forest investigation and management, and it is often used to calculate the standing volume, site index and forest growth related It is an important variable, but the measurement of tree height is time-consuming and labor-intensive, and it will cause a lot of errors. At present, the height measurement methods for trees at home and abroad mainly include visual tree height measurement, tree height measurement by measuring ruler method, and tree measurement by total station method. Height, tree height measurement by ultrasonic method, tree height measurement by laser ranging and angle measurement method, and tree...

AI Technical Summary

Problems solved by technology

[0002] Tree height is an important factor of forest stand, it is not only the quantitative index of forest stand but also the quality index of forest stand; it is the most important measurement factor in forest investigation and management, and it is often used to calculate the standing volume, site index and forest growth related It is an important variable, but the measurement of tree height is time-consuming and labor-intensive, and it will cause a lot of errors. At present, the height measurement methods for trees at home and abroad mainly include visual tree height measurement, tree height measurement by measuring ruler method, and tree measurement by total station method. Height, tree height measurement by ultrasonic method, tree height measurement by laser ranging and angle measurement method, and tree height measurement by aerial photography and photo analysis method. Although large-scale measuring instruments such as theodolite and total station can obtain high measurement accuracy, using this Such instruments also have many inconveniences such as difficulty in carrying, cumbersome operation, and the need for professional measurement knowledge. However, hand-held height measuring tools that can be easily carried and operated are cheap and easy to use, but their measurement accuracy is not high. Measuring errors caused by mechanical friction require frequent adjustments. Trees with high canopy density are relatively close to each other, with overlapping crowns and mutual coverage. Generally, it is impossible to see through and see the top of the tree, so similar triangles and tree tops are used. The altimeter based on the principle of trigonometric functions cannot accurately measure the height of trees. Most altimeters can only accurately measure the height of objects on flat ground or on the ground with a small slope. The difference is obtained after measuring the height once, which increases the workload of the surveyor and easily introduces measurement errors.

[0003] At present, most of the existing tree altimetry samplers can only sample the branches and leaves, and it is difficult to collect the branches when the trees are tall, which cannot meet the needs of the sampling personnel at the same time. It is difficult to see through and the branches and leaves are relatively dense. If the device collects branches and leaves without moving, it will increase the difficulty of sampling and may cause greater damage to high branches and leaves.

Images