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

Abstract

The invention discloses a portable tree diameter measuring device and a measuring method, which solves the problems in the prior art that the tree diameter measuring instrument is large in size and inconvenient to carry, and it is difficult to accurately measure the diameter of trees with large diameter distribution , with the advantages of easy portability and accurate measurement. During measurement, make the surface formed by the first clamping rod and the second clamping rod perpendicular to the axis of the tree, adjust the opening angles of the first clamping rod and the second clamping rod, so that the first clamping rod and the second clamping rod are all aligned with the tree. Cut, adjust the position of the cross bar so that it is tangent to the tree, according to the perimeter of the triangle formed by the first clamp bar, the second clamp bar and the cross bar, the opening angle between the first clamp bar and the second clamp bar and the The geometric relation of the diameter of the tree is calculated to obtain the diameter of the tree.

Description

A portable tree diameter measuring device and measuring method

technical field

The invention relates to a forest measuring device, in particular to a portable tree diameter measuring device and a measuring method.

Background technique

In the current inventory of forest resources and forestry investigation and research, tree diameter at breast height is an index of necessary investigation. The current measurement of tree diameter at breast height is mainly carried out manually with a DBH tape, which needs to wrap the tape around the trunk. For trees with thicker trunks, even two people are required to assist in the measurement, which is inconvenient to operate. Moreover, the unavoidable contact between human hands and the trunk during measurement is easy to be bitten by insects and ants. At the same time, manual reading of the scale is also prone to errors. Therefore, the accuracy and efficiency of traditional measurement methods are difficult to guarantee.

Although there are already instruments for measuring the diameter of trees, such as including a support rod and two clamp rods that are opened at 60°, the laser emission direction of the laser ranging probe is toward the bisector of the opening angle of the two clamp rods, and the support rod is perpendicular to the two clamp rods. The plane where the rod is located, the measured distance between the laser ranging probe and the tree is the radius of the tree to be measured. But the angle between two clamping rods of this kind of measuring instrument is fixed at 60 °, if change its measuring angle, then can't realize the measurement of tree diameter. The diameter distribution range of the tree to be measured is relatively large. If the tree with a larger diameter at breast height is measured, the angle between the two clamping rods is fixed at 60°. When the two clamping rods are tangent to the tree, the clamping rod is required. It has a large length and is inconvenient to carry; and when measuring a tree with a small diameter, the length of the stick is relatively large, which is inconvenient to operate, and it is difficult for one person to complete the measurement, which affects the accuracy of the measurement. In addition, when using this device for measurement, it is necessary to ensure that the laser direction of the laser distance measuring probe is located on the bisector of the opening angle of the two clamping rods. If the laser direction deviates slightly, it will seriously affect the accuracy of detection. The precision requirement is strict, which greatly increases the manufacturing cost of the instrument.

Other diameter measuring instruments also have large volumes, and it is difficult to accurately measure the diameter of trees with large diameter distribution. At the same time, there are many factors that affect the accuracy of tree diameter measurement, and it is difficult to ensure the accuracy of measurement.

To sum up, in the prior art, the diameter measuring instruments of trees are bulky and inconvenient to carry, and it is difficult to accurately measure the diameter of trees with large diameter distribution, and there is still no effective solution.

Contents of the invention

In view of the technical problems existing in the above-mentioned prior art, the purpose of the present invention is to provide a portable tree diameter measuring device and measuring method, the use of the measuring device can avoid direct contact between people and the trunk, and at the same time, the device is convenient for different diameters The diameter of the tree is measured, the device is small and easy to carry, and one person can complete the measurement of the diameter of the tree.

In order to solve the above technical problems, the technical solution of the present invention is:

A portable tree diameter measuring device, comprising a first clamping rod, a second clamping rod and a cross bar, one end of the first clamping rod and the second clamping rod are movably connected 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 their length directions, and a first connecting piece and a second connecting piece are sleeved on the cross bar, and at least one of the two connecting pieces One can slide along the cross bar; the first connecting part and the second connecting part are provided with protrusion structures, the protrusion structure on the first connecting part is inserted into the first groove, and the protrusion structure on the second connecting part is inserted into the second groove Inside, the crossbar is movably installed on the first clamping rod and the second clamping rod;

During measurement, the plane formed by the first clamping rod and the second clamping rod is perpendicular to the axis of the tree, and the opening angles of the first clamping rod and the second clamping rod are adjusted so that the first clamping rod and the second clamping rod are all aligned with the trees. Cutting, adjust the position of the cross bar so that it is tangent to the tree, according to the perimeter of the triangle formed by the first clamp bar, the second clamp bar and the cross bar, the opening angle between the first clamp bar and the second clamp bar and the The geometric relation of the diameter of the tree is calculated to obtain the diameter of the tree.

The opening angle between the first clamping rod and the second clamping rod in the instrument can be adjusted. Even if the thicker trees are measured, the opening angle can be adjusted to make the first clamping rod and the second clamping rod the same as the tree to be measured. Cut, the length requirements of the first clamping rod and the second clamping rod are not strict, which improves the portability of the instrument.

When measuring, it is only necessary to make the first clamping rod, the second clamping rod and the cross bar all tangent to the tree to be measured, and measure the perimeter of the triangle formed by the three and the opening formed by the first clamping rod and the second clamping rod Angle can be calculated to get accurate tree diameter. It should be emphasized that when measuring, it is only necessary to move the crossbar so that it is tangent to the tree to be measured, and there is no need to strictly control the moving direction of the crossbar, that is, the angle formed between the first clamping rod and the second clamping rod Angle, the angles of the two base angles of the triangle formed by the first clamping rod, the second clamping rod and the cross bar are not limited, and the angles of these two angles can be the same or different without affecting the accuracy of measurement. Therefore, there are few factors affecting the measurement accuracy during the measurement process using the instrument, so the requirements for the precision of the instrument manufacturing are reduced, and the manufacturing cost is reduced.

Further, scales are provided on the first clamping rod, the second clamping rod and the cross bar. The operator can quickly know the perimeter of the triangle formed by the above scale without manual measurement.

Further, a protractor is provided at the joint of the ends 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, which improves work efficiency and enables one person to complete the measurement work of the tree diameter at breast height.

Further, the DBH measurement device also includes a detachable support frame, the support frame includes a support base and a foldable support rod (1.3 meters in full extension length), one end of the support rod is fixed on the support base, and the other end is connected to the first card The end joints of the rod and the second locking rod are connected.

The DBH measurement device is fixed under the support of the support frame, which ensures the measurement height and improves the measurement accuracy.

Further, the inner walls of the first groove and the second groove are made of elastic material, the protrusion structures on the first connector and the second connector are rigid structures, and are compatible with the first groove and the second groove interference fit on the inner wall.

When the protruding structure is in interference fit with the inner walls of the first groove and the second groove, a certain amount of frictional resistance will be generated, and after the cross bar is moved in place, it is not easy to slip, which is convenient for measurement and observation.

Further, the first connecting member is fixed on the crossbar, the second connecting member can move along the crossbar, and the position where the first connecting rod is fixed on the crossbar is the zero scale on the crossbar.

Fix the first connecting piece at the zero scale, and when the crossbar is moving, the scale where the second connecting piece is located changes. When the movement ends, the scale where the second connecting piece is located is the length of the effective part of the crossbar, which is convenient observe. The first connecting piece is fixed on the cross bar, and at the same time, the cross bar can be fixed, so that unnecessary sliding of the cross bar during movement and observation is avoided, and the convenience and operability of operation are improved.

Further, the length of the first groove is 2/3-4/5 of the length of the first lever, and the length of the second groove is 2/3-4/5 of the length of the second lever. When the length of the groove is short, it is difficult to measure trees with a thick diameter at breast height. When the length of the groove is long, the excess length is useless. Processing the groove at the redundant part will affect the processing efficiency.

Further, the movable connection ends of the first clamping rod and the second clamping rod are provided with a measurement box, and a control system, a power supply, an angle sensor and a length sensor are arranged in the measurement box, and both the angle sensor and the length sensor are connected with the control system and the power supply, The control system is connected to the power supply.

The angle sensor can be used to detect the opening angle between the first clamping rod and the second clamping rod, the length sensor can be used to detect the length of the first clamping rod, the second clamping rod and the cross bar, and the control program is set in the control system, the angle The angle value and length value measured by the sensor and the length sensor are input into the control system for calculation, and the result of the diameter at breast height of the tree can be directly obtained, realizing intelligent measurement.

Furthermore, the measurement box is provided with a liquid crystal display. The liquid crystal display can directly display the operation results, which is convenient and quick.

Further, the measurement box is provided with a power switch, a measurement button, a charging interface and a data transmission interface.

Further, the movable connection ends of the first clamping rod and the second clamping rod are provided with a measuring box, and a computing system and a power supply are arranged in the measuring box, and an input keyboard is arranged on the measuring box, and the computing system is connected to the power supply, and the input keyboard is connected to the computing system Connect to input the measured angle and length values into the computing system.

The measuring method of the above-mentioned diameter-at-breath measuring device comprises the steps:

1) adjust the inclination angle of the first clamping rod and the second clamping rod, so that the plane formed by the first clamping rod and the second clamping rod is perpendicular to the axis of the tree to be measured;

2) Move the first clamping rod and the second clamping rod, and adjust the size of the opening between the two so that they are all tangent to the tree to be measured;

3) Move the crossbar towards the tree to be measured so that the crossbar is tangent to the tree to be measured;

4) measure the side length of the triangle surrounded by the first clamping rod, the second clamping rod and the cross bar, and calculate the perimeter of the triangle; and measure the opening angle between the first clamping rod and the second clamping rod;

5) Calculate the diameter of the tree according to the perimeter of the triangle formed by the first clamping rod, the second clamping rod and the cross bar, the opening angle between the first clamping rod and the second clamping rod and the diameter of the tree.

Further, in step 5), the diameter of the tree to be measured is D=L/2·tan(α/2), wherein, D is the diameter of the tree to be measured, and L is the first clamping rod, the second clamping rod and the horizontal The perimeter of the triangle surrounded by the rods, α is the opening angle formed between the first clamping rod and the second clamping rod.

The beneficial effects of the present invention are:

1. The opening angle between the first clamping rod and the second clamping rod in the instrument can be adjusted. Even if the measurement is performed on thicker trees, the opening angle can be adjusted to make the first clamping rod and the second clamping rod consistent with the measured The trees are tangent, and there is no strict requirement on the length of the first clamping rod and the second clamping rod, which improves the portability of the instrument.

2. When measuring, it is only necessary to make the first clamping rod, the second clamping rod and the cross bar all tangent to the tree to be measured, and measure the perimeter of the triangle formed by the three and the first clamping rod and the second clamping rod to form a The opening angle can be calculated to get the accurate tree diameter. It should be emphasized that when measuring, it is only necessary to move the crossbar so that it is tangent to the tree to be measured, and there is no need to strictly control the moving direction of the crossbar, that is, the angle formed between the first clamping rod and the second clamping rod Angle, the angles of the two base angles of the triangle formed by the first clamping rod, the second clamping rod and the cross bar are not limited, and the angles of these two angles can be the same or different without affecting the accuracy of measurement. Therefore, there are few factors affecting the measurement accuracy during the measurement process using the instrument, so the requirements for the precision of the instrument manufacturing are reduced, and the manufacturing cost is reduced.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is the structural representation of portable chest diameter measuring device of the present invention;

Fig. 2 is a schematic diagram of the electrical principle of the portable chest diameter measuring device of the present invention;

Fig. 3 is a schematic diagram of the measuring principle of the portable chest diameter measuring device of the present invention.

Among them, 1. Measuring box, 2. Spirit level, 3. Measuring button, 4. Input keyboard, 5. Second connecting piece, 6. Cross bar, 7. First clamping rod, 8. First groove, 9. LCD Display screen, 10. Power switch.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. 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 should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

Example 1

As shown in Figure 1, a portable tree diameter measuring device includes a first clamping rod 7, a second clamping rod and a cross bar 5, and one end of the first clamping rod 7 and the second clamping rod is flexibly connected to form an adjustable opening angle. The V-shaped structure; the lengths of the first clamping rod 7, the second clamping rod and the cross bar 6 are 1 meter, 1 meter and 0.8 meter respectively.

The first clamping rod 7 and the second clamping rod are respectively provided with a first groove 8 and a second groove along its length direction, and the lengths of the first groove 8 and the second groove are respectively 0.8 meters and 0.8 meters. The rod 6 is fitted with a first connecting piece and a second connecting piece 5, the first connecting piece is fixed on the cross bar, the second connecting piece 5 can move along the cross bar, the position of the first connecting rod fixed on the cross bar is At the zero scale on the crossbar; the first connecting piece and the second connecting piece 5 are provided with protruding structures, the protruding structure on the first connecting piece is inserted into the first groove 8, and the protruding structure on the second connecting piece 5 is inserted into In the second groove, the inner wall of the first groove 8 and the second groove is made of elastic material, and the protruding structure on the first connector and the second connector 5 is a rigid structure, and is compatible with the first groove. 8 is interference fit with the inner wall of the second groove, and the crossbar 6 is movably installed on the first clamping rod 7 and the second clamping rod; the first clamping rod 7, the second clamping rod and the crossbar 6 are all provided with scales , the lengths of the three rods can be read separately; a protractor is provided at the connection of the ends of the first rod 7 and the second rod, and the angle α formed between the first rod and the second rod can be quickly measured.

During measurement, make the plane that the first clamping rod 7 and the second clamping rod constitute perpendicular to the axis of the tree, adjust the opening angle of the first clamping rod 7 and the second clamping rod, make the first clamping rod and the second clamping rod all be in line with Trees are tangent, adjust the position of crossbar 6 so that it is tangent to trees, according to the perimeter of the triangle formed by the first clamping rod, the second clamping rod and the crossbar, between the first clamping rod 7 and the second clamping rod The geometric relationship between the opening angle and the diameter of the tree is calculated to obtain the diameter of the tree.

Measuring principle as shown in Figure 3, measure the perimeter (L=L1+L2+L3, as shown in Figure 3) of the triangle formed by the first clamping rod 7, the second clamping rod and the cross bar, half of the triangle's perimeter That is the length (L4) of the tangent section formed by the first clamping rod 7, the second clamping rod and the trunk, by measuring the angle (α) between the first clamping rod 7 and the second clamping 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 DBH measurement device also includes a detachable support frame, the support frame includes a support base and a foldable support rod, one end of the support rod is fixed on the support base, and the connection between the support base and the ends of the first clamping rod and the second clamping rod connect. The DBH measurement device is fixed under the support of the support frame, which ensures the measurement height and improves the measurement accuracy.

Example 3

The movable connection end of the first clamping rod 7 and the second clamping rod is provided with measuring box 1, is provided with control system, power supply, angle sensor and length sensor in the measuring box, and angle sensor and length sensor are all connected with control system and power supply, control The system is connected to a power supply; a liquid crystal display 9 and a level 2 are arranged on the measurement box 1 . The measurement box 1 is provided with a power switch 10, a measurement button 3, a charging interface and a data transmission interface. The specific operation is: turn on the power switch 10, input the number of the tree to be measured with the input keyboard 4, clamp the two clamping rods of the device on the chest height of the trunk, make the two clamping rods of the device be tangent to the trunk respectively, and check the position of the horizontal bubble in the spirit level 2 , to ensure that the two clamping rods are on the same level, and then push the connecting piece 5 of the two clamping rods, so that the middle cross bar 6 is also tangent to the trunk, press the measurement button 3, measure the diameter at breast height of the tree, and display it on the liquid crystal display 9 The resulting diameter at breast height. If the trunk is bent and inclined, the level 2 adjustment requirements do not need to be considered.

Example 4

The movable connection end of the first clamping rod 7 and the second clamping rod is provided with a measuring box 1, and a computing system and a power supply are arranged in the measuring box, and an input keyboard is arranged on the measuring box, and the computing system is connected with the power supply, and the input keyboard is connected with the computing system , input the measured angle value and length value into the computing system, calculate the diameter at breast height of the tree, and display the final diameter at breast height on the display screen.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this 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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