A device and method for measuring outer diameter of a tree

Abstract

The present application proposes a device and method for measuring the outer diameter of a tree. The device comprises: a left ruler, a right ruler, a middle ruler, a controller, a first angle sensor, and a second angle sensor; wherein the left ruler is rotatably connected to the middle ruler, and a first rotation joint is formed at the connection; the right ruler is rotatably connected to the middle ruler, and a second rotation joint is formed at the connection; the first angle sensor is integrated in the first rotation joint, and is used to measure the first angle between the left ruler and the middle ruler; the second angle sensor is integrated in the second rotation joint, and is used to measure the second angle between the right ruler and the middle ruler; the controller is used to read the first angle and the second angle from the first angle sensor and the second angle sensor, respectively, and calculate the outer diameter of the tree to be measured according to the first angle and the second angle. The device for measuring the outer diameter of a tree has the advantages of simple structure and easy operation.

Description

Technical Field

[0001] The present application relates to the technical field of tree measuring equipment, and in particular to a device and method for measuring the outer diameter of a tree. Background Art

[0002] The outer diameter of a tree is one of the most basic factors in forest surveys, and the traditional measurement tool is mainly a girth ruler. The girth ruler is a simple tool, but the surveyor must touch the tree trunk with both hands, which is not suitable for measuring trees with larger outer diameters. For the outer diameter measurement of a large number of standard trees, it usually requires the collaboration of a surveyor and a recorder, and statistical calculations must be performed. The process is time-consuming and prone to errors. In recent years, some electronic products have also been born, such as total station measurement, laser scanners, electronic barcode rulers, etc., but they are difficult to be widely used due to many problems such as complex operation, inconvenience in carrying in the field, difficulty in measuring in dense forests, poor anti-interference, high equipment cost, and low measurement efficiency.

[0003] Therefore, the market needs a tree outer diameter measuring device with the advantages of low cost, high precision, easy operation and short time consumption. Summary of the invention

[0004] The technical problem to be solved by the present application is to propose a tree outer diameter measuring device and method in view of the above-mentioned deficiencies in the prior art, wherein the tree outer diameter measuring device has the advantages of simple structure, simple operation, high measurement efficiency and high precision.

[0005] The tree outer diameter measuring device comprises: a left ruler, a right ruler, a middle ruler, a controller, a first angle sensor, and a second angle sensor; wherein the left ruler is rotatably connected to the middle ruler, and a first rotation joint is formed at the connection; the right ruler is rotatably connected to the middle ruler, and a second rotation joint is formed at the connection;

[0006] The first angle sensor is integrated in the first rotary joint and is used to measure a first angle between the left ruler and the middle ruler; the second angle sensor is integrated in the second rotary joint and is used to measure a second angle between the right ruler and the middle ruler;

[0007] The controller is used for reading the first angle and the second angle from the first angle sensor and the second angle sensor respectively, and calculating the outer diameter of the tree to be measured according to the first angle and the second angle.

[0008] Optionally, the controller is mounted on an intermediate ruler.

[0009] Optionally, the controller is provided with a display screen for displaying the measured outer diameter of the tree.

[0010] Optionally, a Bluetooth module is integrated in the controller for transmitting the measurement data to a host computer.

[0011] Optionally, a memory card is integrated in the controller for storing measurement data.

[0012] Optionally, the controller calculates the outer diameter d of the tree to be measured according to the first angle α and the second angle β as follows:

[0013] When α=90°, β=90°, the controller calculates the outer diameter d of the tree to be tested using the following formula: d=Lw;

[0014] When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the controller calculates the outer diameter d of the tree to be measured using the following formula:

[0015]

[0016] When 90°<α<180° and 90°<β<180°, the controller calculates the outer diameter d of the tree to be tested using the following formula:

[0017]

[0018] Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint and the rotation center of the second rotation joint, the width of the left ruler, the right ruler, and the middle ruler are all w, and the center lines of the left ruler and the middle ruler in the length direction pass through the rotation center of the first rotation joint, and the center lines of the right ruler and the middle ruler in the length direction pass through the rotation center of the second rotation joint.

[0019] On the other hand, the present application also proposes a method for measuring the outer diameter of a tree, which is applied to a controller of a tree outer diameter measuring device, wherein the tree outer diameter measuring device comprises a left ruler, a right ruler, and a middle ruler; the left ruler is rotatably connected to the middle ruler, and a first angle sensor is integrated in the first rotating joint formed; the right ruler is rotatably connected to the middle ruler, and a second angle sensor is integrated in the second rotating joint formed; the left ruler, the middle ruler, and the right ruler are tangent to the circumferential surface of a cross section of the tree to be measured; the method for measuring the outer diameter of a tree comprises the steps of:

[0020] Reading a first angle from a first angle sensor, and reading a second angle from a second angle sensor; wherein the first angle is an angle between a left ruler and a middle ruler measured by the first angle sensor, and the second angle is an angle between a right ruler and a middle ruler measured by the second angle sensor;

[0021] The outer diameter of the tree to be measured is calculated according to the first angle and the second angle.

[0022] Optionally, the process of calculating the outer diameter d of the tree to be measured according to the first angle α and the second angle β is as follows:

[0023] When α=90°, β=90°, the formula for calculating the outer diameter d of the tree to be tested is as follows: d=Lw;

[0024] When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows:

[0025]

[0026] When 90°<α<180° and 90°<β<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows:

[0027]

[0028] Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint and the rotation center of the second rotation joint, the width of the left ruler, the right ruler, and the middle ruler are all w, and the center lines of the left ruler and the middle ruler in the length direction pass through the rotation center of the first rotation joint, and the center lines of the right ruler and the middle ruler in the length direction pass through the rotation center of the second rotation joint.

[0029] The present application proposes a device and method for measuring the outer diameter of a tree, the device comprising: a left ruler, a right ruler, a middle ruler, a controller, a first angle sensor, and a second angle sensor; wherein the left ruler is rotatably connected to the middle ruler, a first rotation joint is formed at the connection, and a first angle sensor is arranged in the first rotation joint for measuring a first angle between the left ruler and the middle ruler; the right ruler is rotatably connected to the middle ruler, a second rotation joint is formed at the connection, and a second angle sensor is arranged in the second rotation joint for measuring a second angle between the right ruler and the middle ruler; the controller is used to read the first angle and the second angle from the first angle sensor and the second angle sensor, respectively, and calculate the outer diameter of the tree to be measured according to the first angle and the second angle.

[0030] When the tree outer diameter measuring device is measuring, the left ruler, the middle ruler and the right ruler are tangent to the circumferential surface of a cross section of the tree to be measured, and the controller calculates the outer diameter of the tree to be measured according to the first angle and the second angle; therefore, the operation of the tree outer diameter measuring device is relatively simple. When the tree outer diameter measuring device does not need to measure, the left ruler, the middle ruler and the right ruler can be folded together for easy carrying.

[0031] In addition, the tree outer diameter measuring device also has the advantages of high measuring efficiency and high measuring accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure is a schematic structural diagram of a tree outer diameter measuring device according to an exemplary embodiment.

[0033] Figure 2 It is a simplified schematic diagram showing a tree outer diameter measuring device in a measuring state according to an exemplary embodiment.

[0034] Figures 3a to 3e It is a simplified schematic diagram showing a tree outer diameter measuring device in different measuring states according to an exemplary embodiment.

[0035] Figure 4 The present invention is a schematic block diagram of a controller of a tree outer diameter measuring device according to an exemplary embodiment.

[0036] Figure 5 The figure is a flow chart of a method for measuring the outer diameter of a tree according to an exemplary embodiment. DETAILED DESCRIPTION

[0037] The following is the specific embodiment of the present application and in conjunction with the accompanying drawings, the technical scheme of the present application is further described, but the present application is not limited to these embodiments. In the following description, specific details such as specific configuration and assembly are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted.

[0038] The present application embodiment shows a tree outer diameter measuring device, referring to Figure 1 The tree outer diameter measuring device comprises: a left ruler 1, a right ruler 3, a middle ruler 2, a controller 4, a first angle sensor, and a second angle sensor; wherein the left ruler 1 is rotatably connected to the middle ruler 2, and a first rotation joint 5 is formed at the connection; the right ruler 3 is rotatably connected to the middle ruler 2, and a second rotation joint 6 is formed at the connection;

[0039] The first angle sensor is integrated in the first rotary joint 5 and is used to measure the first angle between the left ruler 1 and the middle ruler 2; the second angle sensor is integrated in the second rotary joint 6 and is used to measure the second angle between the right ruler 3 and the middle ruler 2;

[0040] The controller 40 is used to read the first angle and the second angle from the first angle sensor and the second angle sensor respectively, and calculate the outer diameter of the tree to be measured according to the first angle and the second angle.

[0041] Specifically, in the tree outer diameter measuring device, two ends of the middle ruler 2 are rotatably connected to one end of the left ruler 1 and one end of the right ruler 3, and a first rotation joint 50 and a second rotation joint 60 are formed at the connection points, respectively.

[0042] Furthermore, the connection between the middle ruler 2 and the left ruler 1 and the right ruler 3 may be hinged.

[0043] When the tree outer diameter measuring device is measuring, the left ruler 1, the middle ruler 2 and the right ruler 3 are tangent to the circumferential surface of a cross section of the tree to be measured, and the controller 40 calculates the outer diameter of the tree to be measured according to the first angle and the second angle.

[0044] Therefore, the operation of the tree outer diameter measuring device is relatively simple. When the tree outer diameter measuring device does not need to be measured, the left ruler 1, the middle ruler 2, and the right ruler 3 can be folded together for easy carrying.

[0045] In addition, the tree outer diameter measuring device also has the advantages of high measuring efficiency and high measuring accuracy.

[0046] refer to Figure 2 , the first angle between the left ruler 1 and the middle ruler 2 is α, the second angle between the right ruler 3 and the middle ruler 2 is β, L is the distance between the rotation center of the first rotation joint 5 and the rotation center of the second rotation joint 6, the widths of the left ruler 1, the right ruler 3, and the middle ruler 2 are all w, and the center lines of the left ruler 1 and the middle ruler 2 in the length direction pass through the rotation center of the first rotation joint 5, and the center lines of the right ruler 3 and the middle ruler 2 in the length direction pass through the rotation center of the second rotation joint 6.

[0047] The trunk of the tree to be measured is simplified into a cylinder, so its cross section can be regarded as a circle; the measurement of the tree outer diameter measuring device is located within a cross section of the vertical rod.

[0048] In some embodiments of the present application, the controller 4 calculates the outer diameter d of the tree to be measured according to the first angle α and the second angle β as follows:

[0049] When α=90°, β=90°, the positional relationship between the left ruler 1, the right ruler 3, and the middle ruler 2 of the tree outer diameter measuring device is as follows: Figure 3a As shown, the controller 4 calculates the outer diameter d of the tree to be tested using the following formula: d=Lw;

[0050] When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the positional relationship between the left ruler 1, the right ruler 3, and the middle ruler 2 of the tree outer diameter measuring device is as follows: Figure 3b to Figure 3dAs shown, the controller 4 calculates the outer diameter d of the tree to be tested using the following formula:

[0051]

[0052] When 90°<α<180° and 90°<β<180°, the positional relationship between the left ruler 1, the right ruler 3, and the middle ruler 2 of the tree outer diameter measuring device is as follows: Figure 3e As shown, the controller 4 calculates the outer diameter d of the tree to be tested using the following formula:

[0053]

[0054] Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint 5 and the rotation center of the second rotation joint 6, the width of the left ruler 1, the right ruler 3, and the middle ruler 2 are all w, and the center lines of the left ruler 1 and the middle ruler 2 in the length direction pass through the rotation center of the first rotation joint 5, and the center lines of the right ruler 3 and the middle ruler 2 in the length direction pass through the rotation center of the second rotation joint 6.

[0055] In some embodiments of the present application, the controller 4 is installed on the middle ruler 2 .

[0056] The controller 4 has the above calculation formula integrated inside to calculate the outer diameter d of the tree to be measured. It should be noted that the calculation formula of the outer diameter d of the tree to be measured is obtained through plane geometric relationship.

[0057] refer to Figure 4 The controller 4 has a microprocessor 41, a display screen 42, a button 43, an SD card 44, a Bluetooth module 45, a switch 46, a power module 47, and a battery 48. The controller 4 is also connected to a first angle sensor 7 and a second angle sensor 8. The first angle sensor 7 and the second angle sensor 8 transmit the measurement information of the first angle and the second angle to the microprocessor 41 of the controller 4. The microprocessor 41 calculates the outer diameter d of the tree to be measured according to the first angle and the second angle.

[0058] The external charger 9 charges the battery 48 through the power module 47. The power module 47 is used to supply power to each functional module, each functional module at least including the microprocessor 41 and the display screen 42; in addition, the power module 47 can also be used to supply power to the first angle sensor 7 and the second angle sensor 8. The power module 47 also has functions such as charging protection, discharging protection, voltage boosting, voltage reduction, etc. In addition, the battery 48 can be a 3.7V lithium battery.

[0059] In some embodiments of the present application, the controller 4 is provided with a display screen 42 for displaying the measured outer diameter of the tree. After the microprocessor calculates the outer diameter d of the tree to be measured, it can be displayed on the display screen 42.

[0060] The key 43 can be used for user input, and the microprocessor 41 is used to monitor the operation of the key. The key can be used to input operation instructions, such as saving data, clearing data, and uploading data to a host computer.

[0061] In some embodiments of the present application, the controller 4 is integrated with a Bluetooth module for transmitting the measurement data to a host computer, where the measurement data can be centrally processed.

[0062] In some embodiments of the present application, the controller 4 is also integrated with a memory card for storing measurement data. The memory card may be an SD card 44 .

[0063] The following is an exemplary use procedure of the tree outer diameter measuring device:

[0064] Step 1: Turn on the switch on the controller 4, open the three-section folding ruler consisting of the left ruler 1, the right ruler 3, and the middle ruler 2, so that the angle between adjacent rulers is 180°, and then approach the tree.

[0065] Step 2: Move the middle ruler 2 so that it is tangent to the tree cylinder.

[0066] Step 3: Rotate the left ruler 1 to make it tangent to the tree cylinder, while keeping the middle ruler 2 tangent to the tree cylinder.

[0067] Step 4: Rotate the right ruler 3 to make it tangent to the tree cylinder, while keeping the middle ruler 2 and the left ruler 1 tangent to the tree cylinder.

[0068] Step 5: The current measured value can be read on the display screen of the controller 4, and data saving, clearing, uploading and other operations can be achieved by operating buttons.

[0069] For example, L is 30cm, w is 3cm; the maximum range of the first angle sensor and the second angle sensor is 360°, and the measurement resolution is 12 bits, so the theoretical minimum accuracy is 360° / 2 12 ≈0.088°. In the microcontroller, the measured angle is rounded off to 0.1° for calculation.

[0070] When the first angle α measured by the first angle sensor is 72.9° and the second angle β measured by the second angle sensor is 64.3°, the controller 4 performs calculation according to the formula when 0<α<90° and 0<β<180°, and the calculation result is 18.87 cm.

[0071] When the first angle α measured by the first angle sensor is 118.6° and the second angle β measured by the second angle sensor is 127.8°, the controller 4 performs calculation according to the formula when 90°<α<180° and 90°<β<180°, and the calculation result is 53.86 cm.

[0072] In summary, the main structure of the tree outer diameter measuring device is only composed of the left ruler 1, the middle ruler 2, and the right ruler 3, and has a simple structure and is easy and efficient to operate.

[0073] On the other hand, the embodiment of the present application also shows a method for measuring the outer diameter of a tree, which is applied to a controller of a tree outer diameter measuring device, wherein the tree outer diameter measuring device comprises a left ruler, a right ruler, and a middle ruler; the left ruler is rotatably connected with the middle ruler, and a first angle sensor is integrated in the first rotating joint formed; the right ruler is rotatably connected with the middle ruler, and a second angle sensor is integrated in the second rotating joint formed; the left ruler, the middle ruler, and the right ruler are tangent to the circumferential surface of a cross section of the tree to be measured; reference Figure 5 , the tree outer diameter measurement method comprises the steps of:

[0074] Step S501, reading a first angle from a first angle sensor, and reading a second angle from a second angle sensor; wherein the first angle is the angle between a left ruler and a middle ruler measured by the first angle sensor, and the second angle is the angle between a right ruler and a middle ruler measured by the second angle sensor;

[0075] Step S502, calculating the outer diameter of the tree to be measured according to the first angle and the second angle.

[0076] Furthermore, the process of calculating the outer diameter d of the tree to be measured according to the first angle α and the second angle β is as follows:

[0077] When α=90°, β=90°, the formula for calculating the outer diameter d of the tree to be tested is as follows: d=Lw;

[0078] When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows:

[0079]

[0080] When 90°<α<180° and 90°<β<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows:

[0081]

[0082] Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint and the rotation center of the second rotation joint, the width of the left ruler, the right ruler, and the middle ruler are all w, and the center lines of the left ruler and the middle ruler in the length direction pass through the rotation center of the first rotation joint, and the center lines of the right ruler and the middle ruler in the length direction pass through the rotation center of the second rotation joint.

[0083] Since the tree outer diameter measurement method shown in this embodiment is applied to the aforementioned tree outer diameter measurement device, the relevant contents can be found in the aforementioned description of the tree outer diameter measurement device, which will not be repeated here.

[0084] The specific embodiments described herein are merely examples of the spirit of the present application. A person skilled in the art of the present application may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present application or exceed the scope defined by the attached claims.

Claims

1. A tree outer diameter measuring device, characterized in that: The tree outer diameter measuring device comprises: a left ruler, a right ruler, a middle ruler, a controller, a first angle sensor, and a second angle sensor; wherein the left ruler is rotatably connected to the middle ruler, and a first rotation joint is formed at the connection; the right ruler is rotatably connected to the middle ruler, and a second rotation joint is formed at the connection; the first angle sensor is integrated in the first rotation joint, and is used to measure a first angle between the left ruler and the middle ruler; the second angle sensor is integrated in the second rotation joint, and is used to measure a second angle between the right ruler and the middle ruler; the controller is used to read the first angle and the second angle from the first angle sensor and the second angle sensor, respectively, and calculate the outer diameter of the tree to be measured according to the first angle and the second angle; The controller is mounted on the middle ruler; The controller is provided with a display screen for displaying the measured outer diameter of the tree.

2. The tree outer diameter measuring device according to claim 1, characterized in that: The controller is integrated with a Bluetooth module for transmitting measurement data to a host computer.

3. The tree outer diameter measuring device according to claim 1, characterized in that: The controller is also integrated with a memory card for storing measurement data.

4. The tree outer diameter measuring device according to claim 1, characterized in that: The process of the controller calculating the outer diameter d of the tree to be measured according to the first angle α and the second angle β is as follows: When α=90°, β=90°, the controller calculates the outer diameter d of the tree to be tested using the following formula: d=Lw; When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the controller calculates the outer diameter d of the tree to be measured using the following formula: When 90°<α<180° and 90°<β<180°, the controller calculates the outer diameter d of the tree to be tested using the following formula: Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint and the rotation center of the second rotation joint, the width of the left ruler, the right ruler, and the middle ruler are all w, and the center lines of the left ruler and the middle ruler in the length direction pass through the rotation center of the first rotation joint, and the center lines of the right ruler and the middle ruler in the length direction pass through the rotation center of the second rotation joint.

5. A method for measuring the outer diameter of a tree, characterized in that: The tree outer diameter measuring method is applied to a controller of a tree outer diameter measuring device, and the tree outer diameter measuring device comprises a left ruler, a right ruler and a middle ruler; the left ruler is rotatably connected with the middle ruler, and a first angle sensor is integrated in the formed first rotating joint; the right ruler is rotatably connected with the middle ruler, and a second angle sensor is integrated in the formed second rotating joint; the left ruler, the middle ruler and the right ruler are tangent to the circumferential surface of a cross section of the tree to be measured; the tree outer diameter measuring method comprises the steps of: reading a first angle from the first angle sensor, and reading a second angle from the second angle sensor; wherein the first angle is the angle between the left ruler and the middle ruler measured by the first angle sensor, and the second angle is the angle between the right ruler and the middle ruler measured by the second angle sensor; and calculating the outer diameter of the tree to be measured according to the first angle and the second angle.

6. The method for measuring the outer diameter of a tree according to claim 5, characterized in that: The process of calculating the outer diameter d of the tree to be measured according to the first angle α and the second angle β is as follows: When α=90°, β=90°, the formula for calculating the outer diameter d of the tree to be measured is as follows: d=Lw; When 0<α<90° and 0<β<180°, or when 0<β<90° and 0<α<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows: When 90°<α<180° and 90°<β<180°, the formula for calculating the outer diameter d of the tree to be tested is as follows: Among them, γ=180°-α-β, L is the distance between the rotation center of the first rotation joint and the rotation center of the second rotation joint, the width of the left ruler, the right ruler, and the middle ruler are all w, and the center lines of the left ruler and the middle ruler in the length direction pass through the rotation center of the first rotation joint, and the center lines of the right ruler and the middle ruler in the length direction pass through the rotation center of the second rotation joint.

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