CN106907973B - Portable tree breast height diameter measuring device and method - Google Patents

Portable tree breast height diameter measuring device and method Download PDF

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Publication number
CN106907973B
CN106907973B CN201710313672.1A CN201710313672A CN106907973B CN 106907973 B CN106907973 B CN 106907973B CN 201710313672 A CN201710313672 A CN 201710313672A CN 106907973 B CN106907973 B CN 106907973B
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clamping rod
rod
tree
clamping
diameter
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CN106907973A (en
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闫琰
刘伟国
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Northwest A&F University
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Northwest A&F University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0035Measuring of dimensions of trees
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/10Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0002Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
    • G01B5/0004Supports
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/08Measuring arrangements characterised by the use of mechanical techniques for measuring diameters

Abstract

The invention discloses a portable tree breast height diameter measuring device and a measuring method, which solve the problems that a breast height diameter measuring instrument for trees in the prior art is large in size, inconvenient to carry and difficult to accurately measure the diameter of trees with large diameter distribution, and have the advantages of convenience in carrying and accuracy in measurement. During measurement, the surface formed by the first clamping rod and the second clamping rod is perpendicular to the axis of the tree, the opening angles of the first clamping rod and the second clamping rod are adjusted to enable the first clamping rod and the second clamping rod to be tangent to the tree, the position of the cross rod is adjusted to enable the cross rod to be tangent to the tree, and the diameter of the tree is calculated according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, and the geometric relation between the opening angle between the first clamping rod and the second clamping rod and the diameter of the tree.

Description

Portable tree breast height diameter measuring device and method
Technical Field
The invention relates to a forest measuring device, in particular to a portable tree breast height diameter measuring device and a measuring method.
Background
In the current forest resource clearing and forestry investigation research, the breast height diameter of trees is an index of necessary investigation. The breast height diameter of the existing tree is mainly measured manually by using a breast height diameter tape, the tape needs to surround the trunk, and even two persons are needed to assist in measurement of the tree with thick trunk, so that the operation is inconvenient. And the hand is inevitable contact with the trunk during measurement, is easy to be bitten by insects and ants, and is easy to generate errors when the scale is read manually. Therefore, the precision and the efficiency of the traditional measuring mode are difficult to guarantee.
Although there are instruments for measuring the diameter of the tree, for example, the instrument includes a support rod and two clamping rods which are opened by 60 degrees, the laser emission direction of the laser ranging probe faces to the bisector of the opening angle of the two clamping rods, the support rod is perpendicular to the plane where the two clamping rods are located, and the distance between the measured laser ranging probe and the tree is the radius of the tree to be measured. However, the angle between the two clamping rods of the measuring instrument is fixed at 60 degrees, and if the measuring angle is changed, the diameter of the tree cannot be measured. The diameter distribution range of the tree to be measured is large, if the tree with the large breast diameter is measured, the included angle between the two clamping rods is fixed at 60 degrees, and when the two clamping rods are tangent to the tree, the clamping rods are required to have large lengths, so that the tree is inconvenient to carry; and if when measuring the less trees of diameter, the length of draw-in bar is great, inconvenient operation, and one person hardly accomplishes the measurement, influences the measuring degree of accuracy. In addition, when the device is used for measuring, the laser direction of the laser ranging probe needs to be ensured to be positioned on a bisector of the opening angle of the two clamping rods, and if the laser direction is slightly deviated, the detection accuracy is seriously influenced, so that the precision requirement on instrument manufacturing is strict, and the manufacturing cost of the instrument is greatly improved.
Other diameter-at-breast measuring instruments also have large volumes, are difficult to accurately measure the diameters of trees with large diameter distribution, and simultaneously have more factors influencing the measurement accuracy of the diameters of the trees, so that the measurement accuracy is difficult to ensure.
In conclusion, the diameter at breast height measuring instrument of trees among the prior art is great in size, inconvenient to carry, is difficult to carry out the problem of the accurate measurement of diameter to the trees of great diameter distribution, still lacks effectual solution.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to provide a portable tree breast-height diameter measuring device and a measuring method.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a portable tree breast height diameter measuring device comprises a first clamping rod, a second clamping rod and a cross rod, wherein one end of the first clamping rod is movably connected with one end of the second clamping rod to form a V-shaped structure with an adjustable opening angle;
the first clamping rod and the second clamping rod are respectively provided with a first groove and a second groove along the length direction of the first clamping rod and the second clamping rod, the cross rod is sleeved with a first connecting piece and a second connecting piece, and at least one of the two connecting pieces can slide along the cross rod; the first connecting piece and the second connecting piece are provided with protruding structures, the protruding structures on the first connecting piece are inserted into the first grooves, the protruding structures on the second connecting piece are inserted into the second grooves, and the cross rod is movably arranged on the first clamping rod and the second clamping rod;
during measurement, a plane formed by the first clamping rod and the second clamping rod is perpendicular to the axis of the tree, the opening angles of the first clamping rod and the second clamping rod are adjusted to enable the first clamping rod and the second clamping rod to be tangent to the tree, the position of the cross rod is adjusted to enable the cross rod to be tangent to the tree, and the diameter of the tree is calculated according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, and the geometric relation between the opening angle between the first clamping rod and the second clamping rod and the diameter of the tree.
Opening angle between first kelly and the second kelly can be adjusted in this instrument, even measure thicker trees, also can make first kelly and second kelly tangent with the trees that await measuring through adjusting opening angle, and is not strict to the length requirement of first kelly and second kelly, has improved the portable performance of instrument.
During measurement, the first clamping rod, the second clamping rod and the cross rod are tangent to the tree to be measured, and the accurate diameter of the tree can be calculated by measuring the perimeter of a triangle formed by the three parts and the opening angle formed by the first clamping rod and the second clamping rod. It needs to be emphasized that, during measurement, only the cross rod needs to be moved to be tangent to the tree to be measured, and the moving direction of the cross rod does not need to be strictly controlled, that is, an angle formed between the first clamping rod and the second clamping rod is set as a vertex angle, angles of two bottom angles of a triangle formed by the first clamping rod, the second clamping rod and the cross rod are not limited, the angles of the two angles can be the same or different, and the accuracy of measurement cannot be influenced. Therefore, factors influencing the measurement accuracy in the measurement process by using the instrument are few, so the precision requirement on instrument manufacturing is reduced, and the manufacturing cost is reduced.
Furthermore, scales are arranged on the first clamping rod, the second clamping rod and the cross rod. The operator can quickly know the perimeter of the enclosed triangle through the scales without manual measurement.
Furthermore, a protractor is arranged at the joint of the end parts of the first clamping rod and the second clamping rod.
The angle formed between the first clamping rod and the second clamping rod can be quickly measured by using the protractor, so that the working efficiency is improved, and one person can finish the measurement of the breast-height diameter of the tree.
Furthermore, the breast diameter measuring device further comprises a detachable support frame, the support frame comprises a support base and a folding type support rod (the complete extension length is 1.3 m), one end of the support rod is fixed on the support base, and the other end of the support rod is connected with the end connection part of the first clamping rod and the second clamping rod.
The breast diameter measuring device is fixed under the support of the support frame, so that the measuring height is ensured, and the measuring accuracy is improved.
Furthermore, the inner walls of the first groove and the second groove are made of elastic materials, and the protruding structures on the first connecting piece and the second connecting piece are rigid structures and are in interference fit with the inner walls of the first groove and the second groove.
When the inner wall interference fit of protruding structure and first recess and second recess, can produce certain frictional resistance, remove the horizontal pole and target in place the back, be difficult to take place to slide, be convenient for measure and observe.
Furthermore, the first connecting piece is fixed on the cross rod, the second connecting piece can move along the cross rod, and the position where the first connecting piece is fixed on the cross rod is a zero scale on the cross rod.
The first connecting piece is fixed at the zero scale, the scale where the second connecting piece is located changes when the cross rod moves, and when the movement is stopped, the scale where the second connecting piece is located is the length of the effective part of the cross rod, so that the observation is convenient. First connecting piece is fixed on the horizontal pole, can fix the horizontal pole simultaneously, avoids the horizontal pole to take place unnecessary slip in removal and observation process, has improved the convenience and the maneuverability of operation.
Furthermore, the length of the first groove is 2/3-4/5 of the length of the first clamping rod, and the length of the second groove is 2/3-4/5 of the length of the second clamping rod. When the length of the groove is short, trees with thick breast diameters are difficult to measure, when the length of the groove is long, redundant length is useless, and the groove is machined at redundant positions, so that machining efficiency is affected.
Furthermore, the movable connecting end of the first clamping rod and the second clamping rod is provided with a measuring box, a control system, a power supply, an angle sensor and a length sensor are arranged in the measuring box, the angle sensor and the length sensor are both connected with the control system and the power supply, and the control system is connected with the power supply.
The angle sensor can be used for detecting the opening angle between the first clamping rod and the second clamping rod, the length sensor can be used for detecting the lengths of the first clamping rod, the second clamping rod and the transverse rod, a control program is arranged in the control system, the angle value and the length value obtained by measuring the angle sensor and the length sensor are input into the control system for operation, the result of the breast height of the tree can be directly obtained, and intelligent measurement is achieved.
Furthermore, a liquid crystal display screen is arranged on the measuring box. The liquid crystal display screen can directly display the operation result, and is convenient and quick.
Furthermore, a power switch, a measuring button, a charging interface and a data transmission interface are arranged on the measuring box.
Furthermore, a measuring box is arranged at the movable connecting end of the first clamping rod and the second clamping rod, an operation system and a power supply are arranged in the measuring box, an input keyboard is arranged on the measuring box and connected with the power supply, the input keyboard is connected with the operation system, and the measured angle value and the measured length value are input into the operation system.
The measuring method of the breast diameter measuring device comprises the following steps:
1) Adjusting the inclination angles of the first clamping rod and the second clamping rod to enable the plane formed by the first clamping rod and the second clamping rod to be vertical to the axis of the tree to be measured;
2) Moving the first clamping rod and the second clamping rod, and adjusting the size of an opening between the first clamping rod and the second clamping rod to ensure that the first clamping rod and the second clamping rod are tangent to the tree to be measured;
3) Moving the cross rod towards the tree to be detected to ensure that the cross rod is tangent with the tree to be detected;
4) Measuring the side length of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, and calculating the perimeter of the triangle; measuring the opening angle between the first clamping rod and the second clamping rod;
5) And calculating to obtain the diameter of the tree according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, the opening angle between the first clamping rod and the second clamping rod and the geometric relation of the diameter of the tree.
Further, in the step 5), the diameter of the tree to be tested is D = L/2 · tan (α/2), where D is the diameter of the tree to be tested, L is a perimeter of a triangle surrounded by the first clamping bar, the second clamping bar and the cross bar, and α is an opening angle formed between the first clamping bar and the second clamping bar.
The invention has the beneficial effects that:
1. opening angle between first kelly and the second kelly can be adjusted in this instrument, even measure thicker trees, all can make first kelly and second kelly tangent with the trees that await measuring through adjusting opening angle, and is not strict to the length requirement of first kelly and second kelly, has improved the portable performance of instrument.
2. During measurement, the first clamping rod, the second clamping rod and the cross rod are tangent to the tree to be measured, and the accurate diameter of the tree can be calculated by measuring the perimeter of a triangle formed by the three parts and the opening angle formed by the first clamping rod and the second clamping rod. It needs to be emphasized that, during measurement, only the cross rod needs to be moved to be tangent to the tree to be measured, and the moving direction of the cross rod does not need to be strictly controlled, that is, an angle formed between the first clamping rod and the second clamping rod is set as a vertex angle, angles of two bottom angles of a triangle formed by the first clamping rod, the second clamping rod and the cross rod are not limited, the angles of the two angles can be the same or different, and the accuracy of measurement cannot be influenced. Therefore, the factors influencing the measuring accuracy in the measuring process by using the instrument are few, so the precision requirement on the instrument manufacture is reduced, and the manufacturing cost is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments and illustrations of the application are intended to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural view of a portable breast diameter measuring device of the present invention;
FIG. 2 is an electrical schematic of the portable breast diameter measuring device of the present invention;
fig. 3 is a schematic view of the measuring principle of the portable breast diameter measuring device of the invention.
The measuring device comprises a measuring box 1, a level meter 2, a measuring button 3, an input keyboard 4, a second connecting piece 5, a cross rod 6, a first clamping rod 7, a first groove 8, a liquid crystal display screen 9 and a power switch 10.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1, a portable tree breast height diameter measuring device comprises a first clamping rod 7, a second clamping rod and a cross rod 5, wherein one end of the first clamping rod 7 is movably connected with one end of the second clamping rod to form a V-shaped structure with an adjustable opening angle; the lengths of the first clamping rod 7, the second clamping rod and the cross rod 6 are 1 meter, 1 meter and 0.8 meter respectively.
A first groove 8 and a second groove are respectively arranged on the first clamping rod 7 and the second clamping rod along the length direction of the first clamping rod and the second clamping rod, the lengths of the first groove 8 and the second groove are respectively 0.8 meter and 0.8 meter, a first connecting piece and a second connecting piece 5 are sleeved on the cross rod 6, the first connecting piece is fixed on the cross rod, the second connecting piece 5 can move along the cross rod, and the position where the first connecting piece is fixed on the cross rod is a zero scale on the cross rod; the first connecting piece and the second connecting piece 5 are provided with protruding structures, the protruding structures on the first connecting piece are inserted into the first groove 8, the protruding structures on the second connecting piece 5 are inserted into the second groove, the inner walls of the first groove 8 and the second groove are made of elastic materials, the protruding structures on the first connecting piece and the second connecting piece 5 are rigid structures and are in interference fit with the inner walls of the first groove 8 and the second groove, and the cross rod 6 is movably arranged on the first clamping rod 7 and the second clamping rod; scales are arranged on the first clamping rod 7, the second clamping rod and the cross rod 6, and the lengths of the three rods can be read respectively; the joint of the end parts of the first clamping rod 7 and the second clamping rod is provided with a protractor, and the angle alpha formed between the first clamping rod and the second clamping rod is obtained through rapid measurement.
During measurement, a plane formed by the first clamping rod 7 and the second clamping rod is perpendicular to the axis of the tree, the opening angles of the first clamping rod 7 and the second clamping rod are adjusted to enable the first clamping rod and the second clamping rod to be tangent to the tree, the position of the cross rod 6 is adjusted to enable the cross rod to be tangent to the tree, and the diameter of the tree is calculated according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod and the geometric relation between the opening angle between the first clamping rod 7 and the second clamping rod and the diameter of the tree.
The measurement principle is as shown in fig. 3, the perimeter of a triangle formed by the first fastening rod 7, the second fastening rod and the cross rod is measured (L = L1+ L2+ L3, as shown in fig. 3), half of the perimeter of the triangle is the length (L4) of a tangent line segment formed by the first fastening rod 7, the second fastening rod and the trunk, and by measuring the included angle (α) of the first fastening rod 7 and the second fastening rod, the diameter of the tree to be measured is D = L4 · tan (α/2) = (L1 + L2+ L3)/2 · tan (α/2).
Example 2
The breast diameter measuring device further comprises a detachable supporting frame, the supporting frame comprises a supporting base and a folding supporting rod, one end of the supporting rod is fixed on the supporting base, and the supporting base is connected with the end connection part of the first clamping rod and the second clamping rod. The breast diameter measuring device is fixed under the support of the support frame, so that the measuring height is ensured, and the measuring accuracy is improved.
Example 3
The movable connecting end of the first clamping rod 7 and the second clamping rod is provided with a measuring box 1, a control system, a power supply, an angle sensor and a length sensor are arranged in the measuring box, the angle sensor and the length sensor are connected with the control system and the power supply, and the control system is connected with the power supply; the measuring box 1 is provided with a liquid crystal display 9 and a level gauge 2. The measuring box 1 is provided with a power switch 10, a measuring button 3, a charging interface and a data transmission interface. The specific operation is as follows: the power switch 10 is turned on, the input keyboard 4 is used for inputting the tree number to be measured, the two clamping rods of the device are clamped at the high position of the chest of the trunk, the two clamping rods of the device are respectively tangent to the trunk, the two clamping rods are ensured to be positioned on the same horizontal plane through the position of the horizontal bubble in the inspection level meter 2, then the connecting piece 5 of the two clamping rods is pushed, the middle transverse rod 6 is also tangent to the trunk, the measuring button 3 is pressed down, the diameter of the chest of the tree is measured, and the finally obtained diameter of the chest is displayed on the liquid crystal display screen 9. If the trunk is bent and inclined, the adjustment requirements of the spirit level 2 need not be taken into account.
Example 4
The movable connecting end of the first clamping rod 7 and the second clamping rod is provided with a measuring box 1, an operation system and a power supply are arranged in the measuring box, an input keyboard is arranged on the measuring box and connected with the power supply, the input keyboard is connected with the operation system, measured angle values and length values are input into the operation system, the tree breast diameter is calculated, and finally obtained breast diameter is displayed on a display screen.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The utility model provides a portable trees chest footpath measuring device which characterized in that: the clamping device comprises a first clamping rod, a second clamping rod and a cross rod, wherein one end of the first clamping rod is movably connected with one end of the second clamping rod to form a V-shaped structure with an adjustable opening angle;
the first clamping rod and the second clamping rod are respectively provided with a first groove and a second groove along the length direction of the first clamping rod and the second clamping rod, the cross rod is sleeved with a first connecting piece and a second connecting piece, and at least one of the two connecting pieces can slide along the cross rod; the first connecting piece and the second connecting piece are provided with protruding structures, the protruding structures on the first connecting piece are inserted into the first grooves, the protruding structures on the second connecting piece are inserted into the second grooves, and the cross rod is movably arranged on the first clamping rod and the second clamping rod;
during measurement, a plane formed by the first clamping rod and the second clamping rod is perpendicular to the axis of the tree, the opening angles of the first clamping rod and the second clamping rod are adjusted to enable the first clamping rod and the second clamping rod to be tangent with the tree, the position of the cross rod is adjusted to enable the cross rod to be tangent with the tree, and the diameter of the tree is calculated according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod and the geometric relation between the opening angle between the first clamping rod and the second clamping rod and the diameter of the tree;
scales are arranged on the first clamping rod, the second clamping rod and the cross rod; or a protractor is arranged at the joint of the end parts of the first clamping rod and the second clamping rod;
the first connecting piece is fixed on the cross rod, the second connecting piece can move along the cross rod, and the position where the first connecting piece is fixed on the cross rod is a zero scale on the cross rod.
2. The chest diameter measuring device according to claim 1, wherein: the breast diameter measuring device further comprises a detachable supporting frame, the supporting frame comprises a supporting base and a folding supporting rod, one end of the supporting rod is fixed on the supporting base, and the other end of the supporting rod is connected with the end connection part of the first clamping rod and the second clamping rod.
3. The chest diameter measuring device according to claim 1, wherein: the inner walls of the first groove and the second groove are made of elastic materials, and the protruding structures on the first connecting piece and the second connecting piece are rigid structures and are in interference fit with the inner walls of the first groove and the second groove.
4. The chest diameter measuring device according to claim 1, wherein: the movable connecting end of the first clamping rod and the second clamping rod is provided with a measuring box, a control system, a power supply, an angle sensor and a length sensor are arranged in the measuring box, the angle sensor and the length sensor are connected with the control system and the power supply, and the control system is connected with the power supply.
5. The chest diameter measuring device according to claim 4, wherein: and the measuring box is provided with a liquid crystal display screen.
6. The breast diameter measuring device according to claim 5, wherein: the measuring box is provided with a power switch, a measuring button, a charging interface and a data transmission interface.
7. The chest diameter measuring device according to claim 1, wherein: the movable connecting end of the first clamping rod and the second clamping rod is provided with a measuring box, an operation system and a power supply are arranged in the measuring box, an input keyboard is arranged on the measuring box and connected with the power supply, the input keyboard is connected with the operation system, and the measured angle value and the measured length value are input into the operation system.
8. The method for measuring a breast diameter measuring device according to any one of claims 1 to 7, wherein: the method comprises the following steps:
1) Adjusting the inclination angles of the first clamping rod and the second clamping rod to enable the plane formed by the first clamping rod and the second clamping rod to be vertical to the axis of the tree to be detected;
2) Moving the first clamping rod and the second clamping rod, and adjusting the size of an opening between the first clamping rod and the second clamping rod to ensure that the first clamping rod and the second clamping rod are tangent to the tree to be measured;
3) Moving the cross rod towards the tree to be detected to ensure that the cross rod is tangent with the tree to be detected;
4) Measuring the side length of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, and calculating the perimeter of the triangle; measuring the opening angle between the first clamping rod and the second clamping rod;
5) And calculating to obtain the diameter of the tree according to the perimeter of a triangle formed by the first clamping rod, the second clamping rod and the cross rod, the opening angle between the first clamping rod and the second clamping rod and the geometric relation of the diameter of the tree.
9. The measurement method according to claim 8, characterized in that: in the step 5), the diameter of the tree to be detected is D = L/2 · tan (α/2), wherein D is the diameter of the tree to be detected, L is the perimeter of a triangle surrounded by the first clamping rod, the second clamping rod and the cross rod, and α is an opening angle formed between the first clamping rod and the second clamping rod.
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CN107677189A (en) * 2017-09-11 2018-02-09 福建农林大学 A kind of device and its application method of straight-bar type geometric method measurement tree breast-height diameter
CN108225234B (en) * 2018-01-17 2020-11-20 中南林业科技大学 Standing tree size detection device based on angle sensor
CN108562200A (en) * 2018-01-19 2018-09-21 中南林业科技大学 A kind of Portable standing wood gauging instrument based on ribbon amount arm anchor ear
CN109579762A (en) * 2018-11-28 2019-04-05 浙江农林大学 A kind of measuring device and measuring method of tree breast-height diameter
CN110030964B (en) * 2019-03-28 2023-07-04 浙江农林大学 Tree outer diameter measuring device and method
CN112539725A (en) * 2020-12-09 2021-03-23 华东师范大学 Method, equipment and computer-readable storage medium for improving analysis precision of trunk growing process
CN113418433A (en) * 2021-05-21 2021-09-21 浙江农林大学 Device and method for measuring tree breast diameter by straight rod type geometric method
CN116659442B (en) * 2023-08-01 2023-10-27 国网浙江省电力有限公司舟山供电公司 Cable diameter detector and working method thereof

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SE406808B (en) * 1977-07-27 1979-02-26 Turen Christer PROCEDURE AND DEVICE FOR ACHIEVING THE ESTIMATE OF THE GROUND AREA OF A FOREST FOREST AND ITS DISTRIBUTION BY DIAMETER CLASS
CN103115578A (en) * 2013-01-24 2013-05-22 北京林业大学 Instrument for measuring diameter of tree at high position
CN103604380B (en) * 2013-11-28 2016-02-17 东北林业大学 Tree breast-height diameter method and Portable tree tree breast diameter survey system

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