A device for measuring tree diameter at breast height

Abstract

The invention relates to the technical field of tree diameter at breast height measurement, in particular to a tree diameter at breast height measuring device, comprising a leather tape measure, a tape is arranged inside the leather tape measure, two leather tape measures are provided, and one side of the two leather tape measures is connected with The bracket, the side of the bracket is slidably connected with the main frame, and the two sides of the main frame are respectively provided with front-end clamping bars, and one end of the front-end clamping bar is connected with the end of the tape away from the leather tape, and the other end of the front-end clamping bar One end is connected with a push-pull frame, and the two sides of the bracket are respectively provided with rear-end clamping rods. Under the clamping action of the rod and the rear end of the clamping rod, they can respectively fit on both sides of the measured trunk to form a surrounding measurement. Each measurement only needs to be operated from one side of the measured trunk without manually surrounding the trunk. More convenient and faster, improve measurement efficiency.

Description

technical field [0001] The invention relates to the technical field of tree diameter measurement, in particular to a tree diameter measurement device. Background technique [0002] Diameter at breast height: Also known as dry diameter, it refers to the diameter of the trunk of the arbor at the chest height from the ground surface. When the section is deformed, the average value of the maximum and minimum values ​​is measured. The height at breast height of different trees is different, and the regulations on diameter at breast height are also different in different countries. In my country and most countries, the chest height is set at a height of 1.3 meters above the ground. Tree diameter at breast height is one of the important measurement indicators for each tree in the national forest survey plot, and it is also an important parameter for scientific research. Accurate measurement of DBH has always been one of the difficulties faced by forestry investigators. [0003] ...

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Problems solved by technology

[0005] (1) It mainly uses a strap around the trunk for measurement. Since the strap cannot maintain a horizontal state when measuring the sample tree, it is very easy to produce measurement errors. Therefore, it is urgent to design a simple and accurate tree diameter measurement device.

[0006] (2) When the diameter of the tree to be measured is large and exceeds the maximum length that the staff can encircle, it is difficult for the staff to directly wrap the strap around the trunk. It requires two people to cooperate to facilitate the operation, which is very troublesome and leads to measurement efficiency. low

[0007] (3) When measuring the diameter of a tree, it is necessary to position the strap at a height of 1.3 meters. The traditional method requires manual positioning before each measurement, which is troublesome but inefficient

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