Forestry measuring device and measuring method

Abstract

The invention relates to the related technical field of forestry measurement, in particular to a forestry measuring device and method, and the device comprises a base, the base is provided with a first hoop and a second hoop, and the first hoop and the second hoop are respectively provided with a measuring mechanism; the device further comprises a supporting shaft rotationally installed on the base, the supporting shaft is rotationally connected with the first hoop and the second hoop, a second limiting sleeve is rotationally installed on the supporting shaft, the second limiting sleeve is connected with the measuring mechanism, and when the second hoop rotates, the second limiting sleeve is connected with the measuring mechanism. The elastic telescopic piece on the first hoop is extruded; the gap driving part is installed on the base and controls rotation of the supporting shaft and rotation of the second hoop respectively, trees with different diameters at breast height are measured, meanwhile, automatic adjustment of the position of the base is achieved, it is guaranteed that the trees are located at the center positions of the first hoop and the second hoop in the measuring process, and therefore the accuracy of measured data is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field related to forestry measurement, and in particular to a forestry measurement device and a measurement method. Background Art

[0002] Forestry is an important resource industry, and its sustainable development is very important for achieving sustainable development of the national economy. The management of forestry resources must rely on effective forestry measurement. Forestry measurement is a very complex process, and its results directly affect the sustainability of forestry management. Through accurate measurement of forest topography, detailed information such as the geographical location, area, landform, and vegetation distribution of the forest can be obtained, providing basic data for the formulation of scientific forestry planning and management programs.

[0003] Existing forestry measurement devices measure the diameter and circumference of trees using ordinary leather measuring tapes. When the measuring tape is stretched, it is easy to rebound, which is very inconvenient to use. It is also inconvenient for a single person to measure trees with larger diameters. Usually, two people are required to measure, which invisibly increases the workload and reduces the measurement speed. In addition, the diameter and circumference of trees with different breast diameters cannot be measured.

[0004] Therefore, a Chinese patent discloses a forestry measuring device and a measuring method (authorization announcement number: CN116202465A), including a shell, a nameplate conveying mechanism for conveying nameplates is arranged on the upper side of the workbench; a clamping mechanism for measuring the diameter of trees is arranged on the front side of the workbench; the present invention stably clamps the trees by arranging the clamping mechanism, and the electric cylinder and the electric piston rod drive the connecting frames on both sides to rotate around the long rod, the middle part of the connecting frame controls the movable part to move on the surface of the second bearing rod through the second bearing rod, and the front end of the connecting frame controls the clamping part to move linearly through the first bearing rod, and then the measuring instrument in the clamping part measures the diameter of the tree, and the lifting and lowering of the clamping mechanism can be realized under the action of the screw rod and the movable frame.

[0005] When the above-mentioned forestry measurement device is used to measure trees, it can measure trees with different diameters at breast height, without causing the problem of inconvenience in single-person measurement and waste of labor in multiple-person measurement. However, the position of the shell needs to be adjusted before the measurement work. Once the position of the tree to be measured is offset, the measurement data will be inaccurate, resulting in errors in data measurement. Summary of the invention

[0006] The object of the present invention is to provide a forestry measurement device to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A forestry measurement device and a measurement method, comprising a base, on which a first clamp and a second clamp are provided, which are combined with each other to form a circular structure, and the first clamp and the second clamp are provided with a measurement mechanism respectively; It also includes a support shaft rotatably mounted on the base, the support shaft is rotatably connected to the first hoop and the second hoop respectively, a second limit sleeve is rotatably mounted on the support shaft, the second limit sleeve is connected to the measuring mechanism, and when the second hoop rotates relative to the first hoop and is closed with the first hoop to form a circular structure, the elastic telescopic member on the first hoop is squeezed to trigger the limit assembly slidably arranged on the support shaft to engage with the second limit sleeve; The gap driving member is installed on the base and controls the rotation of the supporting shaft and the second clamp respectively.

[0008] The forestry measurement device as described above: the measurement mechanism includes a plurality of measurement rods, the measurement rods are respectively arranged equidistantly along the radial direction of the first hoop and the second hoop, and are respectively slidably connected to the first hoop and the second hoop, and one end of the measurement rod extending into the first hoop and the second hoop is flush with the inner ring of the first hoop and the second hoop; It also includes a pushing component slidably disposed on the first clamp and the second clamp, and the pushing component can control the measuring rod to move along the radial direction of the first clamp and the second clamp respectively.

[0009] The forestry measuring device as described above: a slide groove is formed on the measuring rod, an extrusion piece is slidably connected in the slide groove, and a roller abutting against the pushing component is rotatably provided on the extrusion piece.

[0010] The forestry measurement device as described above: the pushing assembly includes two arc-shaped plates, the two arc-shaped plates are slidably mounted on the first clamp and the second clamp respectively, a protrusion is formed on the inner ring of the arc-shaped plate, and the protrusion can squeeze the roller; It also includes a first tooth plate and a second tooth plate, wherein the first tooth plate and the second tooth plate are respectively arranged on the two arc-shaped plates.

[0011] The forestry measurement device as described above: the elastic telescopic member includes a telescopic plate with an arc-shaped structure, a plug-in slot is formed on the end of the first hoop away from the support shaft, one end of the plug-in slot is slidably connected to the telescopic plate, a third tooth plate is provided at the bottom of the telescopic plate, and the third tooth plate is connected to the limit assembly via a transmission assembly provided on the base; It also includes a spring, which is arranged in the plug-in slot, one end of the spring abuts against the plug-in slot, and the other end abuts against the telescopic plate.

[0012] The forestry measuring device as described above: the transmission assembly includes a first connecting shaft rotatably mounted on the base, the first connecting shaft is respectively provided with a first gear and a second gear, the first gear is meshed with the third gear plate, the second gear is meshed with a movable plate slidably arranged on the base, and the end of the movable plate away from the second gear is connected to the limit assembly.

[0013] The forestry measuring device as described above: the limit assembly includes a second connecting shaft rotatably mounted on the base, a third gear meshing with the movable plate is arranged on the second connecting shaft, and a first connecting ring is movably connected to the second connecting shaft, and one end of the first connecting ring away from the second connecting shaft is rotatably connected to a first limit sleeve slidably arranged on the support shaft, and the first limit sleeve is meshed with the second limit sleeve.

[0014] The forestry measurement device as described above: the gap driving member comprises a first driving shaft and a second driving shaft rotatably arranged on the base, the first driving shaft and the second driving shaft are respectively formed with a first limiting groove and a second limiting groove, and a first ball and a second ball adapted to the first limiting groove and the second limiting groove are arranged on the inner ring of the second connecting ring sleeved on the first driving shaft and the second driving shaft; It also includes an electric telescopic rod, which is fixedly mounted on the base, and a movable end of the electric telescopic rod is fixed to the second connecting ring.

[0015] The forestry measuring device as described above: a third transmission shaft is rotatably mounted on the base, the third transmission shaft is rotatably connected to the second limit sleeve via a fourth belt, a fifth gear meshing with the second tooth plate is provided on the third transmission shaft, the third transmission shaft is rotatably connected to the fourth transmission shaft rotatably mounted on the base via a second belt, the fourth transmission shaft is rotatably connected to the fifth transmission shaft rotatably mounted on the base via a third belt, and a fourth gear meshing with the first tooth plate is provided on the fifth transmission shaft.

[0016] A forestry method, using any of the above-mentioned forestry measurement devices, comprises the following steps: Step 1: First, align the notch on the base with the tree whose DBH needs to be measured, and move the base until the tree is in the notch; Step 2: Start the gap driving member to work. Under the control of the second driving shaft, the second hoop rotates relative to the first hoop, and during the rotation, the second hoop squeezes the elastic telescopic member. When the second hoop is completely closed with the first hoop, under the action of the elastic telescopic member, the limiting assembly is engaged with the second limiting sleeve, and at the same time, the second tooth plate is meshed with the fifth gear. Step three: When the second drive shaft stops rotating, the first drive shaft rotates. At this time, the support shaft is controlled to rotate. Under the action of the limit assembly, the measuring mechanism is driven to measure the tree. During the measurement process, the base is automatically adjusted to ensure that the tree is in the center position of the first hoop and the second hoop.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The rotation of the second hoop and the gap operation of the measuring mechanism are controlled by the gap driving member. When the second hoop is controlled to rotate relative to the first hoop, the elastic telescopic member is squeezed so that when the second hoop is completely closed with the first hoop, under the action of the elastic telescopic member, the limit assembly makes a linear motion along the axial direction of the support shaft until it is engaged with the second limit sleeve. Then the support shaft is controlled to rotate. Driven by the limit assembly, the second limit sleeve rotates synchronously to control the measuring mechanism to measure the tree. During the measurement, according to the pressure applied to the measuring mechanism, the base is driven to move relative to the tree to meet the measurement requirements of trees with different breast diameters. At the same time, the base position is automatically adjusted to ensure that the tree is at the center of the first hoop and the second hoop during measurement, thereby ensuring the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a forestry measurement device.

[0019] Figure 2 This is a schematic diagram of the structure of the forestry measurement device from another angle.

[0020] Figure 3 It is a schematic diagram of the structure of the first clamp and the second clamp in the forestry measurement device.

[0021] Figure 4 This is a schematic diagram of the structure of the support shaft and limit assembly in the forestry measurement device.

[0022] Figure 5 It is a schematic diagram of the structure of the gap driving component and the limit assembly in the forestry measurement device.

[0023] Figure 6 It is a structural schematic diagram of the second clamp and the measuring mechanism in the forestry measuring device.

[0024] Figure 7 This is a schematic diagram of the structure of the measuring rod and extrusion parts in the forestry measuring device.

[0025] Figure 8 It is a schematic diagram of the structure of the gap driving component in the forestry measurement device.

[0026] Fig. 9 This is a schematic diagram of the structure of the limit assembly in the forestry measurement device.

[0027] Fig.10 It is a schematic diagram of the structure of the first clamp and the arc plate in the forestry measurement device.

[0028] In the figure: 1, base; 101, arc groove; 2, first clamp; 201, plug-in groove; 3, support shaft; 301, strip groove; 4, second clamp; 5, clamping shaft; 6, measuring rod; 601, slide groove; 7, arc plate; 701, protrusion; 702, first tooth plate; 703, second tooth plate; 8, telescopic plate; 801, third tooth plate; 9, spring; 10, first connecting shaft; 11, first gear; 12, second gear; 13, movable plate; 1301, first tooth block; 1302, second tooth block; 14, second connecting shaft; 1401, threaded groove; 15, third gear; 16, first connecting ring; 17, first limit sleeve; 1701, Strip block; 18, second limiting sleeve; 19, electric telescopic rod; 20, first drive shaft; 2001, first limiting groove; 21, second drive shaft; 2101, second limiting groove; 22, second connecting ring; 23, first bevel gear set; 24, first transmission shaft; 25, first belt; 26, second bevel gear set; 27, second transmission shaft; 28, third bevel gear set; 29, third transmission shaft; 30, second belt; 31, fourth transmission shaft; 32, fifth transmission shaft; 33, fourth gear; 34, extrusion piece; 3401, roller; 35, articulated sleeve; 36, third belt; 37, fourth belt; 38, fifth gear; 39, mounting bracket. DETAILED DESCRIPTION

[0029] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0030] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0031] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0032] The present invention aims to propose a measurement method, specifically a forestry measurement device, which is adapted to measure the diameters of trees at breast height of different sizes and can realize the correction of trees during the measurement process. The specific implementation method is as follows: See also Figure 1 to Figure 10In an embodiment of the present invention, a forestry measurement device includes a base 1, on which a first clamp 2 and a second clamp 4 are provided, which are combined with each other to form a circular structure, and the first clamp 2 and the second clamp 4 are provided with a measurement mechanism respectively; It also includes a support shaft 3 rotatably mounted on the base 1, the support shaft 3 is rotatably connected to the first hoop 2 and the second hoop 4 respectively, a second limit sleeve 18 is rotatably mounted on the support shaft 3, the second limit sleeve 18 is connected to the measuring mechanism, and when the second hoop 4 rotates relative to the first hoop 2 and is closed with the first hoop 2 to form a circular structure, the elastic telescopic member on the first hoop 2 is squeezed to trigger the limit assembly slidably arranged on the support shaft 3 to engage with the second limit sleeve 18; The gap driving member is installed on the base 1 to control the rotation of the support shaft 3 and the second clamp 4 respectively.

[0033] In detail, after controlling the movement of the base 1 so that the tree to be measured is located in the gap of the base 1, the gap driving member is started to work to control the second hoop 4 to rotate relative to the first hoop 2, and the elastic telescopic member is squeezed during rotation, so that when the second hoop 4 is completely closed with the first hoop 2, under the action of the elastic telescopic member, the limit assembly makes a linear motion along the axial direction of the support shaft 3 until it is engaged with the second limit sleeve 18, and then the support shaft 3 is controlled to rotate. Driven by the limit assembly, the second limit sleeve 18 rotates synchronously to control the measuring mechanism to measure the tree, and during the measurement process, according to the pressure exerted on the measuring mechanism, the base 1 is driven to move relative to the tree to meet the measurement of trees with different breast diameters, while realizing automatic adjustment of the position of the base 1 to ensure that the tree is at the center position of the first hoop 2 and the second hoop 4 during measurement, thereby ensuring the accuracy of the measurement data.

[0034] As a further solution of the present invention, please refer to Figure 6 and Figure 7 The measuring mechanism includes a plurality of measuring rods 6, which are respectively arranged equidistantly along the radial direction of the first hoop 2 and the second hoop 4, and are respectively slidably connected to the first hoop 2 and the second hoop 4, and one end of the measuring rod 6 extending into the first hoop 2 and the second hoop 4 is flush with the inner ring of the first hoop 2 and the second hoop 4; It also includes a pushing assembly slidably disposed on the first clamp 2 and the second clamp 4, and the pushing assembly can control the measuring rod 6 to move along the radial direction of the first clamp 2 and the second clamp 4 respectively.

[0035] A slide groove 601 is formed on the measuring rod 6 , and an extrusion member 34 is slidably connected in the slide groove 601 . A roller 3401 that abuts against the pushing component is rotatably provided on the extrusion member 34 .

[0036] The pushing assembly includes two arc plates 7, which are slidably mounted on the first hoop 2 and the second hoop 4, respectively. A protrusion 701 is formed on the inner ring of the arc plate 7, and the protrusion 701 can squeeze the roller 3401. It also includes a first tooth plate 702 and a second tooth plate 703 , and the first tooth plate 702 and the second tooth plate 703 are respectively arranged on the two arc plates 7 .

[0037] Preferably, an articulated sleeve 35 is slidably disposed in the slide groove 601 , and the rotating shaft of the extrusion member 34 is rotatably connected to the articulated sleeve 35 , so that when the measuring rod 6 moves relative to the extrusion member 34 , the rotation of the extrusion member 34 relative to the measuring rod 6 is not affected.

[0038] In detail, when the second hoop 4 rotates to close with the first hoop 2, under the action of the second limit sleeve 18, the two arc plates 7 are controlled to rotate relative to the first hoop 2 and the second hoop 4 respectively, and the multiple protrusions 701 on the arc plate 7 respectively squeeze the roller 3401 close to it, causing the roller 3401 to be subjected to a tilting force, but the position of the extrusion piece 34 is restricted and cannot move. The extrusion piece 34 generates a radial force on the measuring rod 6 along the first hoop 2 and the second hoop 4, so that the measuring rod 6 moves linearly along the radial direction of the first hoop 2 and the second hoop 4. When the measuring rod 6 abuts against the tree, the position of the base 1 is automatically adjusted according to the pressure at different positions, and when the pressure on the multiple measuring rods 6 is the largest, the tree is located at the center position of the first hoop 2 and the second hoop 4, ensuring the accuracy of the measuring rod 6 when measuring.

[0039] Preferably, the measuring rod 6 is provided with a scale, and the circumferential radius of the first clamp 2 and the second clamp 4 does not change, and the diameter at breast height of the tree can be measured by the distance the measuring rod 6 is advanced.

[0040] As a further solution of the present invention, please refer to Figure 3 The elastic telescopic member includes a telescopic plate 8 with an arc-shaped structure, a plug-in slot 201 is formed on one end of the first hoop 2 away from the support shaft 3, one end of the plug-in slot 201 is slidably connected to the telescopic plate 8, and a third tooth plate 801 is provided at the bottom of the telescopic plate 8, and the third tooth plate 801 is connected to the limit assembly through a transmission assembly provided on the base 1; It also includes a spring 9 , which is disposed in the inserting slot 201 , with one end of the spring 9 abutting against the inserting slot 201 , and the other end of the spring 9 abutting against the telescopic plate 8 .

[0041] The transmission assembly includes a first connecting shaft 10 rotatably mounted on the base 1, and a first gear 11 and a second gear 12 are respectively provided on the first connecting shaft 10. The first gear 11 is engaged with the third gear plate 801, and the second gear 12 is engaged with a movable plate 13 slidably arranged on the base 1. The end of the movable plate 13 away from the second gear 12 is connected to the limit assembly.

[0042] Preferably, a first tooth block 1301 and a second tooth block 1302 are respectively disposed at both ends of the movable plate 13 , the first tooth block 1301 meshes with the second gear 12 , and the second tooth block 1302 meshes with the third gear 15 disposed on the second connecting shaft 14 .

[0043] In the initial state, the spring 9 is in a compressed state. When the above-mentioned second hoop 4 rotates, the telescopic plate 8 is squeezed, so that the telescopic plate 8 slides back into the plug-in slot 201 relative to the first hoop 2. At the same time, the spring 9 is squeezed and compressed again. When the telescopic plate 8 slides, the third tooth plate 801 thereon engages with the first gear 11 for transmission, so that the first connecting shaft 10 rotates. Through the engagement of the second gear 12 with the first tooth block 1301, the movable plate 13 moves along the direction of the arc groove 101. When the movable plate 13 slides, the second tooth block 1302 thereon engages with the third gear 15 for transmission to realize the rotation requirement of the second connecting shaft 14, and ensures that after the first hoop 2 and the second hoop 4 are fully closed, the limit assembly is clamped with the second limit sleeve 18 to prepare for the measurement work of the measuring mechanism.

[0044] It should be noted that: in the initial state, the spring 9 is in compression to provide an extrusion force on the telescopic plate 8, so that one end of the telescopic plate 8 can extend out of the plug-in slot 201, wherein a protrusion is formed on the end of the plug-in slot 201 to limit the telescopic plate 8, thereby preventing the telescopic plate 8 from detaching from the plug-in slot 201 when the spring 9 squeezes the telescopic plate 8.

[0045] As a further solution of the present invention, please refer to Figure 5 and Fig. 9 The limiting assembly is rotatably mounted on a second connecting shaft 14 on the base 1, a third gear 15 meshing with the movable plate 13 is provided on the second connecting shaft 14, and a first connecting ring 16 is movably connected to the second connecting shaft 14, and one end of the first connecting ring 16 away from the second connecting shaft 14 is rotatably connected to a first limiting sleeve 17 slidably arranged on the support shaft 3, and the first limiting sleeve 17 is meshed with the second limiting sleeve 18.

[0046] Preferably, a thread groove 1401 is formed on the second connecting shaft 14 , and a third ball matched with the thread groove 1401 is movably provided on the inner ring of the first connecting ring 16 .

[0047] Preferably, at least one group of strip grooves 301 are formed on the support shaft 3, and a strip block 1701 that slides with the strip grooves 301 is provided on the first limit sleeve 17. Under the action of the strip block 1701 and the strip grooves 301, the first limit sleeve 17 can slide relative to the support shaft 3 without affecting the synchronous movement of the first limit sleeve 17 when the support shaft 3 rotates.

[0048] Preferably, a plurality of first latching teeth are equidistantly arranged on the first limiting sleeve 17 along the circumference, and a plurality of second latching teeth meshing with the first latching teeth are arranged on the second limiting sleeve 18 along the circumference.

[0049] When the second connecting shaft 14 rotates, the third ball is squeezed by the thread groove 1401, so that the first connecting ring 16 makes a linear motion along the axial direction of the second connecting shaft 14, and the first connecting ring 16 drives the first limiting sleeve 17 to move upward synchronously when it moves upward. When the second clamp 4 is completely closed with the first clamp 2, the first clamping tooth is completely inserted into the slot formed by the two second clamping teeth, so as to realize the requirement of synchronous rotation of the second limiting sleeve 18 when the support shaft 3 rotates, so as to drive multiple measuring rods 6 to synchronously measure the diameter of the tree at breast height. As a further solution of the present invention, please refer to Figure 5 and Figure 8 The gap driving member includes a first driving shaft 20 and a second driving shaft 21 rotatably arranged on the base 1, and a first limiting groove 2001 and a second limiting groove 2101 are formed on the first driving shaft 20 and the second driving shaft 21 respectively, and a first ball and a second ball adapted to the first limiting groove 2001 and the second limiting groove 2101 are arranged on the inner ring of the second connecting ring 22 sleeved on the first driving shaft 20 and the second driving shaft 21; It also includes an electric telescopic rod 19 , which is fixedly mounted on the base 1 , and a movable end of the electric telescopic rod 19 is fixed to the second connecting ring 22 .

[0050] A third transmission shaft 29 is rotatably mounted on the base 1, and the third transmission shaft 29 is rotatably connected to the second limiting sleeve 18 via a fourth belt 37. A fifth gear 38 meshing with the second tooth plate 703 is provided on the third transmission shaft 29. The third transmission shaft 29 is rotatably connected to a fourth transmission shaft 31 rotatably mounted on the base 1 via a second belt 30. The fourth transmission shaft 31 is rotatably connected to a fifth transmission shaft 32 rotatably mounted on the base 1 via a third belt 36, and a fourth gear 33 meshing with the first tooth plate 702 is provided on the fifth transmission shaft 32.

[0051] Preferably, the first limiting groove 2001 includes an A arc-shaped groove and an A horizontal groove, and the second limiting groove 2101 includes a B arc-shaped groove and a B horizontal groove.

[0052] In the initial state, the first ball on the second connecting ring 22 is located in the arc groove A, and the second ball is located in the horizontal groove B. When the lever of the electric telescopic rod 19 is started to retract, the second connecting ring 22 moves relative to the first drive shaft 20 and the second drive shaft 21, and the first drive shaft 20 is driven to rotate through the action of the first ball and the arc groove A. When the first ball moves in the arc groove A, the second ball always moves in the horizontal groove B, so that when the first drive shaft 20 rotates, the second drive shaft 21 does not rotate, and when the first ball moves to the horizontal groove A, the second ball moves to the arc groove B. At this time, the first drive shaft 20 does not rotate, while the second drive shaft 21 rotates, so as to realize the gap rotation between the first drive shaft 20 and the second drive shaft 21, to ensure that the measuring mechanism starts the measuring work only after the first clamp 2 and the second clamp 4 are completely closed.

[0053] When the second drive shaft 21 rotates, the first transmission shaft 24 installed on the base 1 is driven to rotate through the first bevel gear set 23. When the first transmission shaft 24 rotates, the clamping shaft 5 is driven to rotate through the first belt 25 to control the second clamp 4, and control the separation and closing of the second clamp 4 and the first clamp 2, so as to facilitate the measurement of trees with different breast diameters.

[0054] When the first drive shaft 20 rotates, it is rotationally connected to the second transmission shaft 27 rotatably arranged on the base 1 through the second bevel gear set 26. When the second transmission shaft 27 rotates, it drives the support shaft 3 to rotate under the transmission of the third bevel gear set 28.

[0055] Preferably, a mounting frame 39 with an L-shaped structure is fixedly provided on the base 1 , and one end of the clamping shaft 5 is fixedly connected to the mounting frame 39 .

[0056] It is worth noting that: the first clamp 2 and the second clamp 4 are rotatably connected, and the rotation of the support shaft 3 has no effect on the first clamp 2 and the second clamp. The first clamp 2 is fixedly mounted on the base 1, and the rotation of the second clamp 4 is controlled by the clamping shaft 5. The rotation of the support shaft 3 has no effect on the second limit sleeve 18. After the limit assembly is clamped with the second limit sleeve 18, the second limit sleeve 18 can rotate synchronously when the support shaft 3 rotates.

[0057] A forestry method, using any of the above-mentioned forestry measurement devices, comprises the following steps: Step 1: First, align the notch on the base 1 with the tree whose diameter at breast height needs to be measured, and move the base 1 until the tree is in the notch; Step 2: Start the gap driving member to work. Under the control of the second driving shaft 21, the second hoop 4 rotates relative to the first hoop 2. During the rotation, the second hoop 4 squeezes the elastic member. When the second hoop 4 is completely closed with the first hoop 2, under the action of the elastic member, the limiting assembly is engaged with the second limiting sleeve 18, and at the same time, the second toothed plate 703 is meshed with the fifth gear 38. Step three: When the second drive shaft 21 stops rotating, the first drive shaft 20 rotates, and the support shaft 3 is controlled to rotate. Under the action of the limit assembly, the measuring mechanism is driven to measure the tree, and during the measurement process, the base 1 is automatically adjusted to ensure that the tree is in the center position of the first hoop 2 and the second hoop 4.

[0058] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A forestry measurement device, characterized in that: It comprises a base (1), on which a first clamp (2) and a second clamp (4) which are combined with each other to form a circular structure are arranged, and on which the first clamp (2) and the second clamp (4) are respectively provided a measuring mechanism; It also comprises a support shaft (3) rotatably mounted on the base (1), the support shaft (3) being rotatably connected to the first hoop (2) and the second hoop (4) respectively, a second limit sleeve (18) being rotatably mounted on the support shaft (3), the second limit sleeve (18) being connected to the measuring mechanism, and when the second hoop (4) is controlled to rotate to close with the first hoop (2) and to form a circular structure, the elastic telescopic part on the first hoop (2) is squeezed to trigger the limit assembly slidably arranged on the support shaft (3) to engage with the second limit sleeve (18); A gap driving member is mounted on the base (1) and controls the rotation of the support shaft (3) and the second clamp (4) respectively.

2. A forestry measurement device according to claim 1, characterized in that: The measuring mechanism comprises a plurality of measuring rods (6), the measuring rods (6) being equidistantly arranged along the radial direction of the first clamp (2) and the second clamp (4), and being slidably connected to the first clamp (2) and the second clamp (4), respectively; one end of the measuring rod (6) extending into the first clamp (2) and the second clamp (4) is flush with the inner ring of the first clamp (2) and the second clamp (4); It also comprises a pushing assembly slidably arranged on the first clamp (2) and the second clamp (4), wherein the pushing assembly can control the measuring rod (6) to move radially along the first clamp (2) and the second clamp (4) respectively.

3. A forestry measurement device according to claim 2, characterized in that: A sliding groove (601) is formed on the measuring rod (6), an extrusion member (34) is slidably connected in the sliding groove (601), and a roller (3401) is rotatably provided on the extrusion member (34) and abuts against the pushing component.

4. A forestry measurement device according to claim 3, characterized in that: The pushing assembly comprises two arc-shaped plates (7), the two arc-shaped plates (7) being slidably mounted on the first clamp (2) and the second clamp (4) respectively, a protrusion (701) being formed on the inner ring of the arc-shaped plate (7), and the protrusion (701) being able to exert pressure on the roller (3401); It also comprises a first tooth plate (702) and a second tooth plate (703), wherein the first tooth plate (702) and the second tooth plate (703) are respectively arranged on the two arc-shaped plates (7); The elastic telescopic member comprises a telescopic plate (8) with an arc-shaped structure; a plug-in slot (201) is formed on one end of the first hoop (2) away from the support shaft (3); one end of the plug-in slot (201) is slidably connected to the telescopic plate (8); a third tooth plate (801) is provided at the bottom of the telescopic plate (8); and the third tooth plate (801) is connected to the limit assembly via a transmission assembly provided on the base (1); It also includes a spring (9), the spring (9) being arranged in the plug-in slot (201), one end of the spring (9) being in contact with the plug-in slot (201), and the other end of the spring (9) being in contact with the telescopic plate (8); The transmission assembly comprises a first connecting shaft (10) rotatably mounted on the base (1), a first gear (11) and a second gear (12) being respectively arranged on the first connecting shaft (10), the first gear (11) being meshed with the third gear plate (801), the second gear (12) being meshed with a movable plate (13) slidably arranged on the base (1), and the movable plate (13) being connected to the limit assembly at one end away from the second gear (12); The gap driving member comprises a first driving shaft (20) and a second driving shaft (21) rotatably arranged on the base (1); a first limiting groove (2001) and a second limiting groove (2101) are respectively formed on the first driving shaft (20) and the second driving shaft (21); and a first ball and a second ball matched with the first limiting groove (2001) and the second limiting groove (2101) are arranged on the inner ring of a second connecting ring (22) sleeved on the first driving shaft (20) and the second driving shaft (21); It also comprises an electric telescopic rod (19), wherein the electric telescopic rod (19) is fixedly mounted on the base (1), and the movable end of the electric telescopic rod (19) is fixed to the second connecting ring (22).

5. A forestry measurement device according to claim 4, characterized in that: The limiting assembly comprises a second connecting shaft (14) rotatably mounted on the base (1), a third gear (15) meshing with the movable plate (13) being arranged on the second connecting shaft (14), and a first connecting ring (16) being movably connected to the second connecting shaft (14).

6. A forestry measurement device according to claim 5, characterized in that: One end of the first connecting ring (16) away from the second connecting shaft (14) is rotatably connected to a first limiting sleeve (17) slidably arranged on the supporting shaft (3), and the first limiting sleeve (17) is meshed with the second limiting sleeve (18).

7. A forestry measurement device according to claim 6, characterized in that: A third transmission shaft (29) is rotatably mounted on the base (1); the third transmission shaft (29) is rotatably connected to the second limiting sleeve (18) via a fourth belt (37); and a fifth gear (38) meshing with the second toothed plate (703) is provided on the third transmission shaft (29).

8. A forestry measurement device according to claim 7, characterized in that: The third transmission shaft (29) is rotatably connected to a fourth transmission shaft (31) rotatably mounted on the base (1) via a second belt (30); the fourth transmission shaft (31) is rotatably connected to a fifth transmission shaft (32) rotatably mounted on the base (1) via a third belt (36); the fifth transmission shaft (32) is provided with a fourth gear (33) meshing with the first toothed plate (702).

9. A forestry measurement method, characterized in that: The forestry measurement device according to any one of claims 1 to 8 comprises the following steps: Step 1: First, align the notch on the base (1) with the tree whose diameter at breast height is to be measured, and move the base (1) until the tree is located in the notch; Step 2: The gap driving member is started to work. Under the control of the second driving shaft (21), the second hoop (4) rotates. During the rotation, the second hoop (4) squeezes the elastic telescopic member. When the second hoop (4) is completely closed with the first hoop (2), the limit assembly is engaged with the second limit sleeve (18) under the action of the elastic telescopic member. At the same time, the second toothed plate (703) meshes with the fifth gear (38). Step three: When the second drive shaft (21) stops rotating, the first drive shaft (20) rotates, and the support shaft (3) is controlled to rotate. Under the action of the limit assembly, the measuring mechanism is driven to measure the tree. During the measurement process, the base (1) is automatically adjusted to ensure that the tree is in the center position of the first clamp (2) and the second clamp (4).

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