CN110030964B - Tree outer diameter measuring device and method - Google Patents

Tree outer diameter measuring device and method Download PDF

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Publication number
CN110030964B
CN110030964B CN201910242373.2A CN201910242373A CN110030964B CN 110030964 B CN110030964 B CN 110030964B CN 201910242373 A CN201910242373 A CN 201910242373A CN 110030964 B CN110030964 B CN 110030964B
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ruler
tree
outer diameter
measured
rope belt
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CN110030964A (en
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孙林豪
方陆明
方益明
任俊俊
杨来邦
郑似青
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Zhejiang A&F University ZAFU
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Zhejiang A&F University ZAFU
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G01B21/10Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring diameters
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13Receivers
    • G01S19/14Receivers specially adapted for specific applications
    • GPHYSICS
    • G08SIGNALLING
    • G08CTRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Length-Measuring Instruments Using Mechanical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The invention provides a tree outer diameter measuring device and a method, wherein the tree outer diameter measuring device comprises: a scissors ruler formed by rotationally connecting one end of the first ruler and one end of the second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint; one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint; a sensor that can measure an angle between the first ruler and the second ruler; a controller; the controller can calculate the outer diameter of the tree to be measured according to the angle measured by the sensor. The tree outer diameter measuring device has the advantages of low cost, high precision, simplicity and convenience in operation, short time consumption, portability and the like.

Description

Tree outer diameter measuring device and method
Technical Field
The invention relates to the technical field of tree measurement equipment, in particular to a tree outer diameter measurement device and method.
Background
The outer diameter of the tree is one of the most basic factors of forest investigation, and the traditional measuring tool is mainly a surrounding ruler. The limited range of the caliper is not suitable for tree measurement with larger outer diameter; the ruler surrounding tool is simple, but the two hands of a measurer need to contact the trunk, and the ruler surrounding tool is not suitable for measuring trees with larger outer diameters. For the outer diameter measurement of the trees in a standard land with a large number, the outer diameter measurement is usually completed by cooperation of a measurer and a recorder, and the statistics calculation is performed, so that the efficiency is low and the error is easy to occur. In recent years, some electronic products, such as total station measurement, laser scanners, electronic code bars and the like, are also produced, but the electronic products are difficult to widely apply due to the problems of complex operation, inconvenient field carrying, difficult measurement at dense woods, poor anti-interference performance, high equipment cost, low measurement efficiency and the like. For example, patent publication number CN207007063U discloses a tree diameter measuring device, which comprises: the measuring ruler comprises a measuring ruler, a fixing frame and an adjusting frame, wherein a round hole is formed in one side of the ruler surface of the measuring ruler, a strip-shaped hole is formed in one side of the round hole, the fixing frame is inserted into the round hole, the adjusting frame is inserted into the strip-shaped hole, the measuring ruler is composed of two aluminum alloy plates and a connecting plate which are of parallel structures, a baffle is vertically connected to one side above the two aluminum alloy plates, a group of arc-shaped grooves with the same structure are formed in the lower portion of the two aluminum alloy plates, and a U-shaped structure handle is arranged in the middle of the connecting plate. The tree diameter measuring device disclosed in the patent document is not convenient enough to measure through a mechanical structure.
Therefore, there is a need in the market for a tree outer diameter measuring device that has the advantages of low cost, high precision, simple operation, short time consumption, portability, and the like.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, and provides the tree outer diameter measuring device which has the advantages of low cost, high precision, simple and convenient operation, short time consumption, portability and the like.
This trees external diameter measuring device includes:
a scissors ruler formed by rotationally connecting one end of the first ruler and one end of the second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint;
one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint;
a sensor that can measure an angle between the first ruler and the second ruler;
a controller; the controller can calculate the outer diameter of the tree to be measured according to the angle measured by the sensor.
Further, a display screen is arranged on the controller and used for displaying the measured outer diameter of the tree.
Further, a bluetooth module is integrated in the controller and is used for transmitting the measurement data to the upper computer.
Further, a memory card is integrated in the controller for storing the measurement data.
Further, the controller is mounted at the location of the rotary joint.
Further, the process of calculating the outer diameter of the tree to be measured by the controller is as follows:
according to the calculation equation:
Figure SMS_1
calculating radian b; b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
Further, the controller is integrated with a GPS for recording the position of the tree.
On the other hand, the invention also provides a tree outer diameter measuring method which is applied to a controller of a tree outer diameter measuring device, wherein the tree outer diameter measuring device is provided with a scissors ruler, a rope belt and a sensor, wherein the scissors ruler, the rope belt and the sensor are formed by rotationally connecting one end of a first ruler and one end of a second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint; one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint; the rope belt is wound on the cross section surface of the tree to be detected; the tree outer diameter measuring method comprises the following steps:
acquiring an angle between a first ruler and a second ruler measured by a sensor;
and calculating the outer diameter of the tree to be measured according to the angle measured by the sensor.
Further, calculating the outer diameter of the tree to be measured according to the angle measured by the sensor specifically comprises the following steps:
according to the calculation equation:
Figure SMS_2
calculating radian b; wherein b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
The invention provides a tree outer diameter measuring device which is provided with a scissors ruler, a rope belt and a sensor, wherein the scissors ruler, the rope belt and the sensor are formed by rotationally connecting one end of a first ruler with one end of a second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint; one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint;
during measurement, the rope belt is wound on the cross section surface of the tree to be measured; the controller can calculate the external diameter of the tree to be measured according to the angle measured by the sensor. Therefore, the tree outer diameter measuring device is simple and convenient to operate; when the tree outer diameter measuring device does not need to measure, one end of the first ruler and the second ruler can be folded, and the tree outer diameter measuring device is convenient to carry.
In addition, the tree outer diameter measuring device has the characteristics of high measuring efficiency, high precision, simplicity and convenience in operation and the like.
Drawings
Fig. 1 is a schematic structural view of a tree outer diameter measuring device according to an exemplary embodiment.
Fig. 2 is a simplified schematic diagram of a tree outer diameter measuring device shown in an exemplary embodiment.
Fig. 3 is a geometric schematic of the tree outer diameter measuring device shown in an exemplary embodiment at the time of measurement.
FIG. 4 is a schematic block diagram of a controller shown in an exemplary embodiment.
Fig. 5 is a flow chart illustrating a tree outer diameter measuring method according to an exemplary embodiment.
Detailed Description
The following are specific embodiments of the present application and the technical solutions of the present application are further described with reference to the accompanying drawings, but the present application is not limited to these embodiments. In the following description, specific details such as specific configurations and components are provided merely to facilitate a thorough understanding of embodiments of the present application. It will therefore be apparent 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 application. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
The embodiment of the invention shows a tree outer diameter measuring device, referring to fig. 1 and 2, the tree outer diameter measuring device comprises:
a scissors rule 10 formed by rotationally connecting one end of a first ruler 11 and one end of a second ruler 12; the first ruler 11 and the second ruler 12 are provided with a rotary joint 13 at the joint;
a string 20, one end of the string 20 is connected to one end of the first ruler 11 away from the rotary joint 13, and the other end is connected to one end of the second ruler 12 away from the rotary joint 13;
a sensor that can measure the angle between the first ruler 11 and the second ruler 12;
a controller 30; the controller 30 can calculate the outer diameter of the tree to be measured based on the angle measured by the sensor.
Specifically, one end of the first ruler 11 is hinged to one end of the second ruler 12. The first ruler 11 and the second ruler 12 are rotatable with respect to each other about a rotary joint 13.
The tree outer diameter measuring device is used for measuring, the scissors rule 10 is kept to be in a substantially horizontal direction, and the rope belt 20 is wound on the cross section surface of the tree to be measured; at this time, the controller 30 acquires the angle between the first straight edge 11 and the second straight edge 12 from the sensor, and calculates the outer diameter of the tree to be measured from the angle. Therefore, the tree outer diameter measuring device is easy and convenient to operate.
When the tree outer diameter measuring device does not need to measure, one end of the first ruler 11 and the second ruler 12 can be folded, and the tree outer diameter measuring device is convenient to carry.
In addition, the tree outer diameter measuring device has the characteristics of high measuring efficiency, high precision, simplicity and convenience in operation and the like.
Fig. 3 is a geometric schematic of the tree outer diameter measuring device shown in an exemplary embodiment at the time of measurement. As shown in the figure, the lengths of the first ruler and the second ruler are s; the rope belt is wound on the cross section surface of the trunk of the tree to be detected, and the length is c; the radius of the trunk is r; the rope belt is wound on the cross section surface of the tree to be measured to form an arc with the radian of b; the angle between the first ruler and the second ruler is a.
Further, the process of calculating the outer diameter of the tree to be measured by the controller is as follows:
according to the calculation equation:
Figure SMS_3
calculating radian b; b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
It should be noted that, the trunk of the tree to be measured is regarded as a cylinder, and the section of the cylinder is approximately a circle; the rope belt is wound on the cross section surface of the tree to be measured, and the shape of the rope belt is approximate to an arc.
The outer diameter of the tree to be measured can be solved through the geometric relationship; the controller 30 can calculate the outer diameter d of the tree to be measured according to the above calculation formula.
Referring to fig. 4, the controller 30 includes a processor 31, a sensor 32, a GPS33, bluetooth 34, a display 35, keys 36, and a memory card 37; the power supply section includes: a battery, a power module and a switch;
keys 36 may be used for user input and microprocessor 31 for monitoring key operation. The key can be used for inputting operation instructions, such as data storage, data clearing and uploading of the data to an upper computer.
In some embodiments, the controller 30 has a bluetooth module 34 integrated therein for transmitting measurement data to an upper computer.
In some embodiments, a memory card 37 is also integrated into the controller 30 for storing measurement data.
In some embodiments, the controller 30 is mounted at the location of the rotary joint 13.
In some embodiments, the controller has a GPS integrated therein for recording the location of the tree.
In some embodiments, a display 35 is provided on the controller 30 for displaying the measured outer diameter of the tree.
The tree outer diameter measuring device is used for measuring the outer diameter of the tree to be measured, and the tree outer diameter measuring device comprises the following steps:
step one: when the measurement location is reached, a switch on the controller 30 is turned on, the number of the measurement location is set in the main menu, and then the GPS position of the measurement location is recorded.
Step two: the planes formed by the first ruler 11, the second ruler 12 and the rope belt 20 are parallel to the ground as much as possible by two hands, and the whole tree outer diameter measuring device is moved to enable the rope belt 20 to be attached to the cross section surface;
step three: the display screen on the controller 30 can read the current measured value, and the operations of data storage, cleaning, and the like can be realized by operating keys.
Step four: repeating the three steps to finish the measurement of the breast diameters of all trees at a measurement site.
Specifically, measurements were made as in a Zhejiang university vegetable garden: the GPS position is recorded as follows: 119°43'21"e,30°15'20" n; the measured data are as follows: number 1, outer diameter measurement 225.6; number 2, outer diameter measurement 181.1; number 3, outer diameter measurement 150.3; number 4, outer diameter measurement 245.2; number 5, outer diameter measurement 218.8; number 6, outside diameter measurement 277.9; number 7, outer diameter measurement 197.8; number 8, outer diameter measurement 143.6; number 9, outer diameter measurement 211.9; number 10; an outer diameter measurement 163. The outside diameter measurement is in millimeters.
In combination, the tree outer diameter measuring device has the advantages of simple structure, convenience in carrying and very simple and convenient measuring process.
Fig. 5 is a flow chart illustrating a tree outer diameter measuring method according to an exemplary embodiment. 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 is provided with a scissors ruler, a rope belt and a sensor which are formed by rotationally connecting one end of a first ruler and one end of a second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint; one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint; the rope belt is wound on the cross section surface of the tree to be detected; the tree outer diameter measuring method comprises the following steps:
step S501, obtaining an angle between a first ruler and a second ruler measured by a sensor;
step S502, calculating the outer diameter of the tree to be measured according to the angle measured by the sensor.
Further, calculating the outer diameter of the tree to be measured according to the angle measured by the sensor specifically comprises the following steps:
according to the calculation equation:
Figure SMS_4
calculating radian b; wherein b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
Since the tree outer diameter measuring method shown in this embodiment is applied to the tree outer diameter measuring device described above, the relevant contents refer to the description of the tree outer diameter measuring device described above, and the description thereof will not be repeated here.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (6)

1. The utility model provides a tree external diameter measuring device which characterized in that, this tree external diameter measuring device includes:
a scissors ruler formed by rotationally connecting one end of the first ruler and one end of the second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint;
one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint;
the rope belt, the first ruler and the second ruler are positioned on the same side of the tree to be measured when the tree to be measured is measured;
a sensor that can measure an angle between the first ruler and the second ruler;
a controller; the controller can calculate the outer diameter of the tree to be measured according to the angle measured by the sensor;
the controller is arranged at the position of the rotary joint;
the process of calculating the outer diameter of the tree to be measured by the controller is as follows:
according to the calculation equation:
Figure 134472DEST_PATH_IMAGE002
calculating radian b; b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
2. The tree outer diameter measuring device according to claim 1, wherein a display screen is provided on the controller for displaying the measured tree outer diameter.
3. The tree outer diameter measuring device according to claim 1, wherein the controller is integrated with a bluetooth module for transmitting the measurement data to an upper computer.
4. The tree outer diameter measuring device of claim 1, wherein the controller further has a memory card integrated therein for storing the measured data.
5. The tree outer diameter measuring device of claim 1, wherein the controller has a GPS integrated therein for recording the position of the tree.
6. The tree outer diameter measuring method is 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 is provided with a scissors ruler, a rope belt and a sensor, wherein the scissors ruler, the rope belt and the sensor are formed by rotationally connecting one end of a first ruler and one end of a second ruler; the joint of the first ruler and the second ruler is provided with a rotary joint; one end of the rope belt is connected to one end of the first ruler, which is far away from the rotary joint, and the other end of the rope belt is connected to one end of the second ruler, which is far away from the rotary joint; the rope belt is wound on the cross section surface of the tree to be detected; the rope belt, the first ruler and the second ruler are positioned on the same side of the tree to be measured when the tree to be measured is measured; the tree outer diameter measuring method comprises the following steps:
acquiring an angle between a first ruler and a second ruler measured by a sensor;
calculating the outer diameter of the tree to be measured according to the angle measured by the sensor;
the outer diameter of the tree to be measured is calculated according to the angle measured by the sensor, and is specifically as follows:
according to the calculation equation:
Figure 254875DEST_PATH_IMAGE002
calculating radian b; wherein b is the radian of an arc formed by winding the rope belt on the cross section surface of the tree to be detected; a is the angle between the first ruler and the second ruler measured by the sensor; s is the length of the first ruler and the second ruler; c is the length of the rope belt;
calculating the radius r of the tree to be measured according to the radian b; the calculation formula is as follows: r=c/b;
and determining the outer diameter d of the tree to be tested, wherein d=2r.
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Publication number Priority date Publication date Assignee Title
CN112066925A (en) * 2020-08-28 2020-12-11 浙江农林大学 Device and method for measuring breast diameter and height of standing tree
CN114674197B (en) * 2022-02-17 2023-03-24 成都飞机工业(集团)有限责任公司 Aircraft wire harness bending radius measuring method, device, equipment and medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068885A (en) * 1992-07-24 1993-02-10 吉林省林业科学研究院 Diameter measuring gauge and calibrate method
CN102426005A (en) * 2011-11-18 2012-04-25 北京林业大学 Automatic measurement device for treewalk growth
CN202770427U (en) * 2012-09-24 2013-03-06 北京林业大学 Portable digital tree diameter detecting and recording device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1455227A1 (en) * 1986-04-28 1989-01-30 Украинский Научно-Исследовательский Институт Орошаемого Садоводства Device for measuring diameters of tree trunks
JPH0772688B2 (en) * 1992-08-18 1995-08-02 中央電子株式会社 Measuring method and measuring device for outer diameter of cylindrical body
CN103115578A (en) * 2013-01-24 2013-05-22 北京林业大学 Instrument for measuring diameter of tree at high position
CN103604380B (en) * 2013-11-28 2016-02-17 东北林业大学 Tree breast-height diameter method and Portable tree tree breast diameter survey system
CN106907973B (en) * 2017-05-05 2023-03-14 西北农林科技大学 Portable tree breast height diameter measuring device and method
CN107726947B (en) * 2017-11-02 2020-07-28 中南林业科技大学 Diameter measuring method based on shear ruler
CN108204797B (en) * 2018-01-17 2020-11-03 中南林业科技大学 Standing tree size detection method based on angle sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1068885A (en) * 1992-07-24 1993-02-10 吉林省林业科学研究院 Diameter measuring gauge and calibrate method
CN102426005A (en) * 2011-11-18 2012-04-25 北京林业大学 Automatic measurement device for treewalk growth
CN202770427U (en) * 2012-09-24 2013-03-06 北京林业大学 Portable digital tree diameter detecting and recording device

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
一种基于拉绳传感器的树木直径记录仪;陈金星;张茂震;赵平安;金雨菲;何卫安;郭含茹;;西北林学院学报(04);全文 *
便携式树木胸径测量系统的研制;孙林豪;方陆明;唐丽华;刘江俊;;北京林业大学学报(09);全文 *

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