Tree height measuring instrument through laser angle measurement

Abstract

The utility model relates to the technical field of optical measurement, and discloses a laser angle measuring tree height measuring instrument which comprises a scale base, a measuring mechanism is installed on the top of the scale base and used for detection and measurement, and a plurality of telescopic mechanisms are installed on the front side and the rear side of the bottom of the scale base at equal intervals. The telescopic mechanism is used for adjusting the height of the scale base; the measuring mechanism comprises a fixed short piece, the fixed short piece is installed on the top of the scale base, a supporting column is fixedly connected to the middle of the inner wall of the fixed short piece, and an arc-shaped support is fixedly connected to the top end of the supporting column. According to the utility model, the laser pen aims at the top of a tree, and the electronic protractor measures an angle alpha; the measuring mechanism is moved to the left inserting groove, the angle beta is measured after leveling, the distance L between two points of the scale of the base is read, the tree height is calculated through a formula, the instrument is made of a laser pen and an electronic protractor which are common objects, the cost is smaller than 100 yuan, operation is easy and convenient, and the instrument is worthy of popularization.

Description

Technical Field

[0001] This utility model relates to the field of optical measurement technology, and in particular to a laser angle measuring instrument for measuring tree height. Background Technology

[0002] A laser protractor is an instrument that uses laser technology to measure angles. Its core principle is to utilize the high directionality, monochromaticity, and coherence of laser light to achieve accurate angle measurement. It has wide applications in many fields. The laser protractor for measuring tree height is a professional instrument that integrates laser ranging and angle measurement technologies to quickly and accurately measure the height of trees. It emits a laser beam through a laser ranging module and uses the principle of laser reflection to measure the horizontal or slant distance between the instrument and the tree. At the same time, it combines an angle sensor to obtain the measured angle in real time, and then calculates the height of the tree using trigonometric functions.

[0003] A search revealed Chinese Patent Publication No. CN108120383B, which discloses an instrument and method for rapidly measuring tree height. The instrument includes a single-leg support, a fixed plate, a sliding frame, a lens, a distance-fixing hole, a controller, a first angle measuring device, and a second angle measuring device. The single-leg support is perpendicular to the center of one side of the fixed plate, while the sliding frame, distance-fixing hole, first angle measuring device, and second angle measuring device are located on the other side of the fixed plate. The lens is mounted on the sliding frame. The first angle measuring device measures the front-to-back tilt angle gf1 of the single-leg support relative to the vertical direction, and the second angle measuring device measures the left-to-right tilt angle gr1 of the single-leg support relative to the vertical direction. The lens, first angle measuring device, and second angle measuring device are all connected to the controller. However, current instruments for measuring tree height include total stations, electronic altimeters, and measuring rods. The first two are expensive, costing thousands or even tens of thousands of yuan, and are complex to operate, requiring professional training. Measuring rods are only suitable for shorter trees; when the trees are too tall, they cannot measure the top of the tree, thus failing to meet the usage requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a laser angle measuring instrument for measuring tree height, which aims to improve the existing technology of measuring tree height, which is expensive and complicated to operate, and cannot meet the needs of users.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a laser protractor for measuring tree height, comprising a scale base, a measuring mechanism mounted on the top of the scale base for measuring, and multiple telescopic mechanisms equidistantly mounted on the front and rear sides of the bottom of the scale base for adjusting the height of the scale base; the measuring mechanism includes a fixed short piece mounted on the top of the scale base, a support column fixedly connected to the middle of the inner wall of the fixed short piece, an arc-shaped bracket fixedly connected to the top of the support column, a spirit level fixedly connected to the top of the arc-shaped bracket, a mounting bracket mounted on the top of the spirit level, a U-shaped rotating block mounted on the right side of the outer wall of the mounting bracket, a laser pointer fixedly connected inside the U-shaped rotating block, an electronic protractor fixedly connected to the left end of the outer wall of the laser pointer, insertion slots on both the left and right sides of the top of the scale base, and bolts threadedly connected to the front and rear sides of the top of the fixed short piece.

[0006] As a further description of the above technical solution:

[0007] The telescopic mechanism includes a threaded rod, which is equidistantly installed on the front and rear sides of the bottom of the scale base. An adjusting column is threadedly connected to the outer wall of the threaded rod, and a drive assembly is installed on the front side of the outer wall of the scale base.

[0008] As a further description of the above technical solution:

[0009] The drive assembly includes a hollow block, which is installed on the front and rear sides of the outer wall of the scale base. A square plate is fixedly connected to the inner wall of the hollow block. A worm gear is fixedly connected to the top of the threaded rod. A fixed short block is fixedly connected to the upper middle part of the outer wall of the adjusting column. A fixed short column is fixedly connected to the bottom of the square plate. A worm gear is rotatably connected to the upper middle part of the inner wall of the threaded rod.

[0010] As a further description of the above technical solution:

[0011] The bottom end of the fixed short column is fixedly connected to a fixed short block one, and the interior of the fixed short block two is slidably connected to the outer wall of the fixed short column.

[0012] As a further description of the above technical solution:

[0013] The upper part of the outer wall of the hollow block is rotatably connected to the interior of the square plate, and a throttle handle is fixedly connected to the outer wall of the worm gear at the opposite end.

[0014] As a further description of the above technical solution:

[0015] The worm gear meshes with the worm wheel, and a fixed short block is fixedly connected to the bottom end of the fixed short column.

[0016] As a further description of the above technical solution:

[0017] An adjusting block is installed on the top front side of the U-shaped rotating block, and the adjusting block is rotatably connected to the U-shaped rotating block.

[0018] As a further description of the above technical solution:

[0019] An adjustment block two is installed on the top of the mounting bracket, and the outer wall of the adjustment block two is threadedly connected to the inner wall of the mounting bracket.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, a scale base is placed on a flat ground. After leveling with a bubble level, the measuring mechanism is fixed in the insertion slot on the right side of the base. A laser pointer is used to aim at the top of the tree, and an electronic protractor is used to measure the angle α. Then, the measuring mechanism is moved to the insertion slot on the left side, leveled, and the angle β is measured. The distance L between the two points is obtained by reading the scale on the base. The tree height is calculated using the formula H=Lsinαsinβ / sin(α—β)+h (where h is the height of the protractor above the ground). This instrument is made using common items such as a laser pointer and an electronic protractor, and the cost is less than 100 yuan. It is easy to operate and worth promoting.

[0022] 2. In this utility model, the worm gear is driven to rotate by rotating the throttle, and the threaded rod is driven to rotate synchronously by the worm wheel. Since the adjusting column cannot rotate due to the restriction of the fixed short block and the fixed short column, the rotation of the threaded rod is converted into the linear extension and retraction of the adjusting column, thereby realizing the height adjustment of the scale base. Multiple sets of extension and retraction mechanisms at the bottom of the base can be adjusted independently to ensure that the instrument remains level on uneven ground. Attached Figure Description

[0023] Figure 1 This is a front view of a laser angle measuring instrument for measuring tree height proposed in this utility model;

[0024] Figure 2 This is a three-dimensional view of a laser angle measuring instrument for measuring tree height proposed in this utility model;

[0025] Figure 3 This is a partial structural schematic diagram of a laser angle measuring tree height instrument proposed in this utility model;

[0026] Figure 4 This is a partial structural exploded view of a laser angle measuring tree height instrument proposed in this utility model;

[0027] Figure 5 This is a split view of the telescopic mechanism of a laser angle measuring tree height instrument proposed in this utility model.

[0028] Legend:

[0029] 1. Scale base; 2. Measuring mechanism; 201. Fixed short piece; 202. Support column; 203. Bolt; 204. Laser pointer; 205. U-shaped rotating block; 206. Level bubble; 207. Arc bracket; 208. Insertion slot; 209. Electronic protractor; 210. Mounting bracket; 211. Adjusting block one; 212. Adjusting block two; 3. Telescopic mechanism; 301. Threaded rod; 302. Adjusting column; 303. Drive assembly; 3031. Hollow block; 3032. Fixed short block one; 3033. Fixed short column; 3034. Fixed short block two; 3035. Throttle; 3036. Worm gear; 3037. Square plate; 3038. Worm wheel. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 3 , Figure 4 and Figure 5This utility model provides an embodiment of a laser angle measuring tree height instrument, including a scale base 1, a measuring mechanism 2 mounted on the top of the scale base 1 for measuring, and multiple telescopic mechanisms 3 equidistantly mounted on the front and rear sides of the bottom of the scale base 1 for adjusting the height of the scale base 1. The measuring mechanism 2 includes a fixed short piece 201 mounted on the top of the scale base 1, a support column 202 fixedly connected to the middle of the inner wall of the fixed short piece 201, an arc-shaped bracket 207 fixedly connected to the top of the support column 202, a spirit level 206 fixedly connected to the top of the arc-shaped bracket 207, a mounting bracket 210 mounted on the top of the spirit level 206, a U-shaped rotating block 205 mounted on the right side of the outer wall of the mounting bracket 210, and a laser pointer 204 fixedly connected inside the U-shaped rotating block 205. An electronic protractor 209 is fixedly connected to the left end of the outer wall. Insertion slots 208 are provided on the left and right sides of the top of the scale base 1. Bolts 203 are threadedly connected to the front and rear sides of the top of the fixed short piece 201. A fixed short block 3032 is fixedly connected to the bottom end of the fixed short column 3033. The interior of the fixed short block 3034 is slidably connected to the outer wall of the fixed short column 3033. The fixed short column 3033 can limit the movement distance of the fixed short block 3034. The upper middle part of the outer wall of the threaded rod 301 is rotatably connected to the interior of the square plate 3037. The square plate 3037 can support the fixed threaded rod 301 to rotate. A handle 3035 is fixedly connected to the outer wall of the worm gear 3036 at the opposite ends. The handle 3035 on the outer wall of the worm gear 3036 can facilitate the operator to rotate and use the worm gear 3036.

[0032] Specifically, place the scale base 1 near the tree to be measured on a flat surface. Observe the level bubble 206 to ensure that the scale base 1 is in a horizontal position. Fix the measuring mechanism 2 to the insertion slot 208 on the right side of the scale base 1 using the bolt 203 on the fixing piece 201. Then turn on the laser pointer 204 and emit the laser to the highest point of the tree to be measured. At this time, the electronic protractor 209 measures the angle between the line connecting the instrument to the top of the tree and the horizontal direction, and records it as angle α. Then remove the measuring mechanism 2 and fix it to the insertion slot 208 on the left side of the scale base 1. Observe the level bubble 206 again to ensure it is horizontal. Turn on the laser pointer 204 and aim it at the highest point of the tree. The electronic protractor 209 measures the angle at this time and records it as angle β. At the same time, read the distance L between the two measurement points, i.e., the left and right sides of the base, according to the scale on the scale base 1. Calculate the distance using the trigonometric function formula H=Lsinαsinβ / sinα—β+h, where L is the distance between the two measurement points on the base. The distance between the measuring points, α and β are the angles obtained from the two measurements, and h is the height of the electronic protractor 209 from the ground. The height H of the tree is finally obtained. The laser pointer 204, electronic protractor 209, and spirit level 206 are familiar and easily obtained items for students. The base with scale 1 is also not difficult to make. The total price is less than 100 yuan, which is worth promoting. The interior of the fixed short block 2 3034 is slidably connected to the outer wall of the fixed short column 3033. The fixed short column 3033 can limit the movement distance of the fixed short block 2 3034. The upper middle part of the outer wall of the threaded rod 301 is rotatably connected to the interior of the square plate 3037. The square plate 3037 can support the fixed threaded rod 301 to rotate. The outer wall of the worm 3036 is fixedly connected to the opposite end with a handle 3035. The handle 3035 on the outer wall of the worm 3036 can facilitate the operation of the worm 3036 by the staff.

[0033] Reference Figure 1 , Figure 2 and Figure 5The telescopic mechanism 3 includes a threaded rod 301, which is equidistantly installed on the front and rear sides of the bottom of the scale base 1. An adjusting column 302 is threadedly connected to the outer wall of the threaded rod 301. A drive assembly 303 is installed on the front side of the outer wall of the scale base 1. The drive assembly 303 includes a hollow block 3031, which is installed on the front and rear sides of the outer wall of the scale base 1. A square plate 3037 is fixedly connected to the inner wall of the hollow block 3031. A worm gear 3038 is fixedly connected to the top of the threaded rod 301. The adjusting column 302... A fixed short block 3034 is fixedly connected to the upper middle part of the outer wall, a fixed short column 3033 is fixedly connected to the bottom of the square plate 3037, a worm 3036 is rotatably connected to the upper middle part of the inner wall of the hollow block 3031, the hollow block 3031 can support the fixed worm 3036 to rotate, the worm 3036 is meshed with the worm wheel 3038, and a fixed short block 3032 is fixedly connected to the bottom end of the fixed short column 3033, the fixed short block 3032 can limit the movement distance of the fixed short block 3034.

[0034] Specifically, by rotating the throttle 3035, the worm 3036 is driven to rotate at the connection point between the square plate 3037 and the upper part of the inner wall of the threaded rod 301. The worm 3036 meshes with the worm wheel 3038, transmitting the rotational motion to the worm wheel 3038, which in turn drives the threaded rod 301 to rotate synchronously. When the threaded rod 301 rotates, because it is threadedly connected to the adjusting column 302, and the adjusting column 302 restricts its own rotation through the fixed short block 3034 and the fixed short column 3033, the rotation of the threaded rod 301 is converted into the linear motion of the adjusting column 302, thus achieving the scale bottom. The height of the base 1 is adjustable. Multiple telescopic mechanisms 3 on the front and rear sides of the bottom of the scale base 1 can adjust the extension length of each adjusting column 302 according to the flatness of the ground to ensure that the base is level. The upper part of the inner wall of the hollow block 3031 is rotatably connected to the worm gear 3036. The hollow block 3031 can support and fix the worm gear 3036 to rotate. The worm gear 3036 is meshed with the worm wheel 3038. The bottom end of the fixed short column 3033 is fixedly connected to the first fixed short block 3032. The first fixed short block 3032 can limit the movement distance of the second fixed short block 3034.

[0035] Reference Figure 1 , Figure 3 and Figure 4 An adjustment block 211 is installed on the top front side of the U-shaped rotating block 205. The adjustment block 211 is rotatably connected to the U-shaped rotating block 205. By rotating the adjustment block 211, the laser pointer 204 on the U-shaped rotating block 205 can be adjusted. An adjustment block 212 is installed on the top of the mounting bracket 210. The outer wall of the adjustment block 212 is threadedly connected to the inner wall of the mounting bracket 210. By rotating the adjustment block 212, it is easy to install the adjustment block 212 on the mounting bracket 210 for use.

[0036] Specifically, an adjustment block 211 is installed on the top front side of the U-shaped rotating block 205. The adjustment block 211 is rotatably connected to the U-shaped rotating block 205. By rotating the adjustment block 211, the laser pointer 204 on the U-shaped rotating block 205 can be adjusted. An adjustment block 212 is installed on the top of the mounting bracket 210. The outer wall of the adjustment block 212 is threadedly connected to the inner wall of the mounting bracket 210. By rotating the adjustment block 212, it is easy to install the adjustment block 212 on the mounting bracket 210 for use.

[0037] Working principle: Place the scale base 1 near the tree to be measured on a flat surface. Observe the level bubble 206 to ensure that the scale base 1 is in a horizontal position. Fix the measuring mechanism 2 to the insertion slot 208 on the right side of the scale base 1 using the bolt 203 on the fixing piece 201. Then turn on the laser pointer 204 and emit the laser to the highest point of the tree to be measured. At this time, the electronic protractor 209 measures the angle between the line connecting the instrument to the top of the tree and the horizontal direction, and records it as angle α. Then remove the measuring mechanism 2 and fix it to the insertion slot 208 on the left side of the scale base 1. Observe the level bubble 206 again to ensure it is horizontal. Turn on the laser pointer 204 and aim it at the highest point of the tree. The electronic protractor... 209 measures the included angle at this time and records it as angle β. At the same time, read the distance L between the two measurement points, i.e., the left and right sides of the base, according to the scale on the base 1. Use the trigonometric function formula H=Lsinαsinβ / sinα—β+h to calculate, where L is the distance between the two measurement points on the base, α and β are the angles obtained from the two measurements, and h is the height of the electronic protractor 209 from the ground. Finally, the height H of the tree is obtained. The laser pointer 204, electronic protractor 209, and bubble level 206 are familiar and easily obtained items for students. The scale base 1 is also not difficult to make. The total price is less than 100 yuan, which is worth promoting.

[0038] By rotating the throttle 3035, the worm gear 3036 is driven to rotate at the connection between the square plate 3037 and the upper part of the inner wall of the threaded rod 301. The worm gear 3036 meshes with the worm wheel 3038, transmitting the rotational motion to the worm wheel 3038, which in turn drives the threaded rod 301 to rotate synchronously. When the threaded rod 301 rotates, it is connected to the adjusting column 302 by threads, and the adjusting column 302 restricts its own rotation through the fixed short block 3034 and the fixed short column 3033. Therefore, the rotation of the threaded rod 301 is converted into the linear motion of the adjusting column 302, realizing the height adjustment of the scale base 1. The multiple telescopic mechanisms 3 on the front and rear sides of the bottom of the scale base 1 can adjust the extension length of each adjusting column 302 according to the flatness of the ground to ensure that the base is level.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser angle measuring instrument for measuring tree height, comprising a scale base (1), characterized in that: A measuring mechanism (2) is installed on the top of the scale base (1). The measuring mechanism (2) is used for detection and measurement. Multiple telescopic mechanisms (3) are installed at equal intervals on the front and back sides of the bottom of the scale base (1). The telescopic mechanisms (3) are used to adjust the height of the scale base (1). The measuring mechanism (2) includes a fixed short piece (201), which is installed on the top of the scale base (1). A support column (202) is fixedly connected to the middle of the inner wall of the fixed short piece (201). An arc-shaped bracket (207) is fixedly connected to the top of the support column (202). A level bubble (206) is fixedly connected to the top of the arc-shaped bracket (207). A mounting bracket (210) is installed on the top of the level bubble (206). A U-shaped rotating block (205) is installed on the right side of the outer wall of the mounting bracket (210). A laser pointer (204) is fixedly connected inside the U-shaped rotating block (205). An electronic protractor (209) is fixedly connected to the left end of the outer wall of the laser pointer (204). An insertion slot (208) is provided on both the left and right sides of the top of the scale base (1). Bolts (203) are threadedly connected to the front and rear sides of the top of the fixed short piece (201).

2. The laser angle measuring instrument for measuring tree height according to claim 1, characterized in that: The telescopic mechanism (3) includes a threaded rod (301), which is equidistantly installed on the front and rear sides of the bottom of the scale base (1). An adjusting column (302) is threadedly connected to the outer wall of the threaded rod (301), and a drive assembly (303) is installed on the front side of the outer wall of the scale base (1).

3. The laser angle measuring instrument for measuring tree height according to claim 2, characterized in that: The drive assembly (303) includes a hollow block (3031), which is installed on the front and rear sides of the outer wall of the scale base (1). A square plate (3037) is fixedly connected to the inner wall of the hollow block (3031). A worm gear (3038) is fixedly connected to the top of the threaded rod (301). A fixed short block (3034) is fixedly connected to the upper middle part of the outer wall of the adjusting column (302). A fixed short column (3033) is fixedly connected to the bottom of the square plate (3037). A worm gear (3036) is rotatably connected to the upper middle part of the inner wall of the threaded rod (301).

4. The laser angle measuring instrument for measuring tree height according to claim 3, characterized in that: The bottom end of the fixed short column (3033) is fixedly connected to a fixed short block one (3032), and the interior of the fixed short block two (3034) is slidably connected to the outer wall of the fixed short column (3033).

5. A laser angle measuring instrument for measuring tree height according to claim 3, characterized in that: The upper part of the outer wall of the hollow block (3031) is rotatably connected to the interior of the square plate (3037), and a throttle handle (3035) is fixedly connected to the outer wall of the worm gear (3036) at the opposite end.

6. The laser angle measuring instrument for measuring tree height according to claim 3, characterized in that: The worm (3036) is meshed with the worm wheel (3038), and a fixed short block (3032) is fixedly connected to the bottom end of the fixed short column (3033).

7. The laser angle measuring instrument for tree height according to claim 1, characterized in that: An adjustment block (211) is installed on the top front side of the U-shaped rotating block (205), and the adjustment block (211) is rotatably connected to the U-shaped rotating block (205).

8. A laser angle measuring instrument for measuring tree height according to claim 1, characterized in that: An adjustment block two (212) is installed on the top of the mounting bracket (210), and the outer wall of the adjustment block two (212) is threadedly connected to the inner wall of the mounting bracket (210).

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