Portable tree DBH (diameter at breast height) measuring device

Abstract

The utility model relates to the technical field of tree breast diameter measurement, and discloses a portable tree breast diameter measuring device, which comprises a hollow main ruler with an opening at one end, an auxiliary ruler is inserted in the main ruler, and the sum of the lengths of the main ruler and the auxiliary ruler is a specific value; the auxiliary ruler is of a groove structure. The end, away from the main ruler, of the auxiliary ruler is rotationally connected with a measuring ruler matched with the groove structure in size. Scales are arranged on the measuring ruler in the length direction, a containing groove is further formed in the measuring ruler in the length direction, two connecting pieces are arranged in the containing groove, one connecting piece is fixed to one end of the containing groove, and the other connecting piece is in sliding fit with the containing groove. The fixed caliper and the movable caliper are matched with the width size of the containing groove, and the plane where the rotating direction of the two calipers is located is perpendicular to the plane where the rotating direction of the measuring ruler is located. The problems that in the prior art, a tree diameter at breast height measuring device is inconvenient to operate and not high in portability are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tree diameter at breast height measurement, in particular to a portable tree diameter at breast height measurement device. Background Technique

[0002] Tree diameter at breast height measurement is crucial for evaluating tree growth status, forest resource quantity, and formulating reasonable management strategies. The tree diameter at breast height generally specifically refers to the diameter of the tree trunk at 1.3 meters above the ground. When measuring the tree diameter at breast height, the traditional method is to first mark the position at the height of 1.3m on the tree trunk, and then use a flexible ruler to measure around the tree at the marked position. Although the flexible ruler is convenient to carry, the actual operation is inconvenient and the measurement speed is slow.

[0003] In the prior art, a foldable forestry tree diameter at breast height measurement device is disclosed. Two measurement components are connected by setting connection buckles. The mounting frame and the support ruler are in threaded connection with the connection buckles. By rotating the screw in the measurement component, this device has many components, the assembly is cumbersome, and the measurement operations such as rotating the screw are not convenient. Although some components can be folded and stored, the folding and storage are not complete, and the portability is not high. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a portable tree diameter at breast height measurement device to solve the problems of inconvenient operation and low portability of the diameter at breast height measurement device in the prior art.

[0005] The utility model solves the above technical problems through the following technical means: A portable tree diameter at breast height measurement device includes a main ruler that is hollow and open at one end. A secondary ruler is inserted into the main ruler, and the sum of the lengths of the main ruler and the secondary ruler is a specific value. The secondary ruler is of a groove structure, and a measurement ruler that is adapted to the size of the groove structure is rotatably connected to the end of the secondary ruler away from the main ruler. The measurement ruler is provided with scales along its length direction, and a storage groove is also opened along the length direction of the measurement ruler. Two connecting pieces are arranged in the storage groove, one of the connecting pieces is fixed at one end of the storage groove, the other connecting piece is slidably matched with the storage groove, and a fixed caliper and a movable caliper that are adapted to the width size of the storage groove are respectively rotatably connected. The planes where the rotation directions of the two calipers are located are perpendicular to the plane where the rotation direction of the measurement ruler is located.

[0006] Optionally, a limiting member is provided at the end of the secondary ruler away from the measurement ruler, and limiting holes are correspondingly provided at both ends of the main ruler. By setting the limiting member and the limiting holes, the secondary ruler will not completely separate from the main ruler.

[0007] Optionally, the opening of the main ruler is rectangular. The main ruler with a rectangular opening enables the secondary ruler inserted into the main ruler not to rotate relative to the main ruler.

[0008] Optionally, the maximum rotation angle of the measurement ruler relative to the secondary ruler is 90°. So that the measurement ruler remains perpendicular to the secondary ruler after being opened.

[0009] Optionally, the maximum rotation angle of the two calipers relative to the measuring ruler is 90°. After the two calipers are opened, they are perpendicular to the measuring ruler, which is convenient for measuring the diameter at breast height of trees.

[0010] Optionally, the specific value is 1.3 m. This makes the device meet the measurement height requirements for the diameter at breast height of trees.

[0011] Optionally, the rotation of the measuring ruler relative to the secondary ruler, and the rotations of the fixed caliper and the movable caliper relative to the measuring ruler are all realized through a pin shaft structure. The pin shaft structure facilitates the opening and folding of the measuring ruler and the calipers.

[0012] Advantages of the present utility model:

[0013] When the present utility model is in use, only the secondary ruler needs to be slid out, and then the measuring ruler and the calipers are rotated and opened in sequence. Since the height position of the measuring ruler is 1.3 m after the secondary ruler is slid out, when the bottom of the main ruler contacts the ground, the measuring personnel can hold the secondary ruler with one hand and slide the movable caliper with the other hand to measure the diameter at breast height of the tree, realizing single-person rapid and convenient measurement operation; after use, the fixed caliper, the movable caliper, and the measuring ruler can be rotated and folded into the groove of the secondary ruler in sequence, and the secondary ruler can be completely slid into the main ruler, thus achieving maximum portability. In addition, since all components are received into the main ruler, components such as the measuring ruler will not collide with other devices or instruments, reducing the risk of damage. Description of the drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is an exploded view of the present utility model.

[0016] Among them, 1 - main ruler, 11 - limit hole, 2 - secondary ruler, 21 - limiting member, 3 - measuring ruler, 31 - receiving groove, 32 - connecting member, 4 - fixed caliper, 5 - movable caliper. Specific embodiments

[0017] The following specific embodiments are used to illustrate the implementation manners of the present utility model. Those skilled in the art can understand the advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present utility model. In order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, and do not represent the actual dimensions of the products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0018] In the figures of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components. In the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the figures. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the figures are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0019] As Figure 1 - Figure 2 shown, a portable tree diameter at breast height measuring device of the present utility model is provided. As Figure 1 shown, it includes a main ruler 1 that is hollow and open at one end. The opening of the main ruler 1 is rectangular. A secondary ruler 2 is inserted into the main ruler 1. The rectangular opening of the main ruler enables the secondary ruler inserted into the main ruler not to rotate relative to the main ruler. The sum of the lengths of the main ruler 1 and the secondary ruler 2 is a specific value. In this embodiment, the specific value is 1.3 m. As Figure 2 shown, the secondary ruler 2 has a groove structure. A measuring ruler 3 that is dimensionally adapted to the groove structure is rotatably connected to the end of the secondary ruler 2 away from the main ruler 1. The measuring ruler 3 is provided with scales along its length direction. A receiving groove 31 is also formed along the length direction of the measuring ruler 3. Two connecting members 32 are arranged in the receiving groove 31. One of the connecting members 32 is fixed at the end close to the secondary ruler 2 and is rotatably connected to a fixed caliper 4 that is dimensionally adapted to the width of the receiving groove 31. The other connecting member 32 is slidably engaged with the receiving groove 31 and is rotatably connected to a movable caliper 5 that is dimensionally adapted to the width of the receiving groove 31, so that the movable caliper 5 can slide along the length direction of the receiving groove 31. The sum of the lengths of the fixed caliper 4 and the movable caliper 5 is less than or equal to the length of the receiving groove 31. The two calipers and the corresponding connecting members are symmetrically arranged. The two calipers rotate inward and are in the same plane, and the plane where the rotation directions of the two calipers are located is perpendicular to the plane where the rotation direction of the measuring ruler 3 is located. After the main ruler 1, the secondary ruler 2, the measuring ruler 3, the fixed caliper 4, and the movable caliper 5 are opened, the plane where the main ruler 1, the secondary ruler 2, and the measuring ruler 3 are located is perpendicular to the plane where the measuring ruler 3, the fixed caliper 4, and the movable caliper 5 are located.

[0020] As Figure 2As shown in the figure, in order to prevent the secondary scale 2 from completely detaching from the main scale 1, a limiting member 21 is provided at one end of the secondary scale 2 away from the measuring scale 3. Corresponding limiting holes 11 are provided at both ends of the main scale 1. When the secondary scale 2 is completely slid into the main scale 1, the limiting member 21 pops out and extends into the limiting hole 11 at the right end. Similarly, when the secondary scale 2 reaches the maximum sliding-out position, the limiting member 21 pops out and extends into the limiting hole 11 at the left end. During the sliding process, the limiting member 21 is squeezed by the inner wall of the main scale and retracts into the secondary scale 2. Specifically, the limiting member 21 includes a blind hole and a cylindrical head with a spring. A blind hole is opened at one end of the secondary scale 2 away from the measuring scale 3, and a cylindrical head with a spring is fixedly connected in the blind hole. Part of the cylindrical head protrudes out of the blind hole at the natural length of the spring. Under the extrusion of the inner wall of the main scale 1, the spring is compressed and the cylindrical head retracts into the blind hole. When the limiting member 21 aligns with the limiting hole 11, part of the cylindrical head extends into the limiting hole 11, thereby realizing the relative fixation between the secondary scale 2 and the main scale 1.

[0021] In this embodiment, as Figure 2 shown, due to the limitation of the end of the groove of the secondary scale 2, the back of the measuring scale 3 rotates to abut against the groove. At this time, the measuring scale 3 is perpendicular to the secondary scale 2, so that the maximum rotation angle of the measuring scale 3 relative to the secondary scale 2 is 90°; similarly, the connecting member 32 is in the shape of a rectangular block, and communicating grooves are opened on two adjacent surfaces, so that any side of the caliper 4 rotates to abut against the groove, realizing the limitation of rotation, so that the maximum rotation angle of the caliper 4 relative to the connecting member 32 of the measuring scale 3 is 90°.

[0022] In this embodiment, as Figure 2 shown, the rotation of the measuring scale 3 relative to the secondary scale 2, and the rotations of the fixed caliper 4 and the movable caliper 5 relative to the measuring scale 3 are all realized through a pin shaft structure. That is, pin shafts are fixedly connected to both sides of the ends of the measuring scale 3, the fixed caliper 4, and the movable caliper 5, and pin holes are opened on the corresponding secondary scale 2 and measuring scale 3, so that the measuring scale 3 can rotate around the pin shaft relative to the secondary scale 2, and the fixed caliper 4 and the movable caliper 5 can also rotate around the pin shaft relative to the measuring scale 3.

[0023] It can be understood that in some other embodiments, according to the actual situation, the connecting member 32 of the fixed caliper 4 can also be fixedly arranged at one end of the receiving groove 31 away from the secondary scale 2, and the connecting member 32 of the corresponding movable caliper 5 is arranged at the other end of the receiving groove 31.

[0024] The working principle of the present utility model is as follows:

[0025] When tree diameter at breast height measurement is required, slide out the secondary scale 2, rotate and open the measuring scale 3 in the groove of the secondary scale 2, and then rotate and open the caliper in the storage groove 31 of the measuring scale 3. Since the height position of the measuring scale is 1.3 m after the secondary scale 2 is slid out, when the bottom of the main scale 1 touches the ground, the measurer can hold the secondary scale 2 with one hand and slide the movable caliper 5 with the other hand to measure the tree diameter at breast height, realizing single-person operation. After the measurement is completed, rotate and fold and store the fixed caliper 4, the movable caliper 5, and the measuring scale 3 in sequence, and then slide the secondary scale 2 completely into the main scale 1 to achieve maximum convenience for carrying. Since all components are stored in the main scale 1, components such as the measuring scale 3 and the caliper will not collide with other devices or instruments, reducing the risk of damage.

[0026] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

Claims

1. A portable tree diameter at breast height measuring device, comprising a hollow main ruler (1) with one end open, characterized in that: A secondary scale (2) is inserted into the main scale (1), and the sum of the lengths of the main scale (1) and the secondary scale (2) is a specific value; the secondary scale (2) is a groove structure, and one end of the secondary scale (2) away from the main scale (1) is rotatably connected to a measuring scale (3) that matches the size of the groove structure; the measuring scale (3) is provided with scales along the length direction, and the measuring scale (3) is also provided with a storage groove (31) along the length direction, and two connecting members (32) are provided in the storage groove (31), one of the connecting members (32) is fixed to one end of the storage groove (31), and the other connecting member (32) is slidably matched with the storage groove (31), and is rotatably connected to a fixed caliper (4) and a movable caliper (5) that match the width size of the storage groove (31), respectively, and the planes where the rotation directions of the two calipers are located are perpendicular to the plane where the rotation direction of the measuring scale (3) is located.

2. The portable tree breast diameter measuring device according to claim 1, characterized in that: A stopper (21) is provided at one end of the secondary ruler (2) away from the measuring ruler (3), and stopper holes (11) are provided at both ends of the main ruler (1) correspondingly.

3. The portable tree breast diameter measuring device according to claim 1, characterized in that: The opening of the main ruler (1) is rectangular.

4. The portable tree breast diameter measuring device according to claim 1, characterized in that: The maximum rotation angle of the measuring ruler (3) relative to the auxiliary ruler (2) is 90°.

5. The portable tree breast diameter measuring device according to claim 1, characterized in that: The maximum rotation angle of the two calipers relative to the measuring ruler (3) is 90°.

6. The portable tree breast diameter measuring device according to claim 1, characterized in that: The specific value is 1.3 m.

7. The portable tree breast diameter measuring device according to claim 1, characterized in that: The rotation of the measuring ruler (3) relative to the auxiliary ruler (2), and the rotation of the fixed caliper (4) and the movable caliper (5) relative to the measuring ruler (3) are all achieved through the pin shaft structure.

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