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Diameter measurement device based on cut ruler

A technology of diameter measurement and scissors, which is applied in the field of diameter measuring devices based on scissors, can solve the problems of high requirements on the operating environment of the measuring object, limited measuring diameter range, inconvenient carrying and measuring, etc., and is conducive to remote data collection. , easy-to-implement, cleverly structured effects

Active Publication Date: 2018-05-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The disadvantages are: the sliding foot is in tight contact with the ruler body, it is not easy to slide, it is loose, it is often not parallel to the fixed foot, the measurement is inaccurate, and it is greatly affected by humidity and rainy days, so it is inconvenient to carry (the sliding foot is easy to fall off)
[0010] These two optical products have complex structure, high cost, limited measurement diameter range, high requirements on the operating environment of the measurement object, and inconvenient portability and measurement
It is not suitable for the application and promotion of large-scale forest areas, mountains, and complex and changeable forest environments in the wild

Method used

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  • Diameter measurement device based on cut ruler
  • Diameter measurement device based on cut ruler
  • Diameter measurement device based on cut ruler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: as figure 2 , a diameter measuring device based on scissors, including scissors 1, a straightedge and a protractor 4; the first end of the straightedge is connected with the hinge point A of the scissors, and the second end of the straightedge is used to connect with the measured Object (such as trunk 3) surface contact; The measured object is cylindrical or cylindrical;

[0071] Open the two arms of the scissors to clamp the measured object, and the second end of the ruler is in contact with the surface of the measured object;

[0072] The diameter Φ of the measured object is calculated based on the length of the ruler and the opening angle of the scissors measured by the protractor.

[0073] Described ruler is T-square 2.

[0074] The diameter of the measured object Φ=2R=2*L0*sin(a / 2) / [1-sin(a / 2)];

[0075] Where L0 is the length of the straightedge from the hinge point to the second end; generally the length of the straightedge is a fixed length.

...

Embodiment 2

[0080] Such as Figure 2-5 , a diameter measuring device based on scissors, comprising scissors (1), a ruler and a protractor (4); the first end of the ruler is connected with the hinge point A of the ruler, and the second end of the ruler is connected with In contact with the surface of the measured object; the measured object is cylindrical or cylindrical;

[0081] Open the two arms of the scissors to clamp the measured object, and the second end of the ruler is in contact with the surface of the measured object;

[0082] The diameter Φ of the measured object is calculated based on the length of the ruler and the opening angle of the scissors measured by the protractor.

[0083] Described ruler is T-square (2).

[0084] The diameter of the measured object Φ=2*(R1+R2+R3) / 3;

[0085] in:

[0086] R1 is the radius corresponding to the contact point D between the second end of the ruler and the surface of the measured object;

[0087] R2 is the radius corresponding to the p...

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Abstract

The invention discloses a diameter measurement device based on a cut ruler, and the device comprises a cut ruler (1), a straight ruler and a protractor (4). A first end part of the straight ruler is connected with a hinge point of the cut ruler (1), and a second end part of the straight ruler is used for making contact with the surface of a detected object. The detected object is cylindrical, andtwo arms of the cut ruler (1) are opened to clamp the detected object. The second end of the straight ruler makes contact with the surface of the detected object. The diameter Phi of the detected object is calculated based on the length of the straight ruler and the opening angle, measured by the protractor (4), of the cut ruler (1). The device is compact in structure, is easy to implement, and can achieve the automatic measurement of the diameter.

Description

technical field [0001] The invention relates to a scissors-based diameter measuring device. Background technique [0002] Standing tree diameter, especially the diameter at breast height (diameter at breast height) is an important basic tree measurement factor in forest measurement work, which is directly related to the estimation of forest growth, forest stock volume, forest productivity and forest quality. [0003] At present, the commonly used tools for measuring diameter include calipers, girths, and laser calipers; [0004] (1) Calipers: Also known as calipers, they are made of wood and aluminum. Constructed as figure 1 , can be divided into fixed feet, sliding feet and ruler body. When measuring the diameter, the ruler body and the two feet are in contact with the measured tree section at the same time, and the reading is taken. [0005] Its disadvantages are: the sliding foot is in tight contact with the ruler body, it is not easy to slide, it is loose, it is ofte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B5/00G01B5/08G01B7/02
CPCG01B5/0035G01B5/08G01B7/02
Inventor 肖化顺刘峰王颖龙时胜
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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