CN109579762A - A kind of measuring device and measuring method of tree breast-height diameter - Google Patents
A kind of measuring device and measuring method of tree breast-height diameter Download PDFInfo
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- CN109579762A CN109579762A CN201811434176.2A CN201811434176A CN109579762A CN 109579762 A CN109579762 A CN 109579762A CN 201811434176 A CN201811434176 A CN 201811434176A CN 109579762 A CN109579762 A CN 109579762A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 57
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 9
- 238000000691 measurement method Methods 0.000 claims description 5
- 210000000481 breast Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/10—Measuring 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The present invention provides a kind of measuring device and measuring method of tree breast-height diameter, it include: the first ruler item, second ruler item and operating case, one end of the first ruler item is flexibly connected with one end of the second ruler item, form the adjustable v-shaped structure of an opening angle, trees are clamped in the v-shaped structure, angle measurement unit and range unit are provided in the operating case, the rotational angle of the first ruler item and/or the second ruler item is measured by the angle measurement unit, the spacing between the first ruler item and the junction and trees of the second ruler item is measured by the range unit, data processing equipment is provided in the operating case, according to the rotational angle and the spacing, obtain the measurement result of tree breast-height diameter.The apparatus structure is simple, easy to carry, easy to operate, can increase substantially measurement working efficiency.
Description
Technical field
The present invention relates to agricultural technical field more particularly to a kind of measuring device and measuring method of tree breast-height diameter.
Background technique
Tree breast-height diameter refers to diameter of the trees at 1.3 meters of ground, in current forest assessment and forestry tune
It looks into research, tree breast-height diameter is most basic one of data, and traditional measuring tool mainly encloses ruler or slide calliper rule, encloses ruler needs
Gauger's both hands are around trunk, and operation is laborious, and the measurement range of slide calliper rule is limited, is not suitable for the trees being relatively large in diameter, in addition,
The data of the every one tree of manual record are also needed in measurement process, and the measurement data of each tree wood in full wafer forest is divided
Class statistics and analysis, process are time-consuming and laborious.
There are also some for measuring the instrument of tree diameters, and such as application No. is 201710313672.1 Chinese patents
A kind of Portable tree tree breast diameter survey device and measurement method are disclosed, which solve the tree breast diameter surveys of trees in the prior art
Equipment instrument is larger, inconvenient to carry, it is difficult to which the problem of carrying out the accurate measurement of diameter to the trees of larger diameter distribution has
It is easy to carry, measure accurate advantage.When measurement, the face for constituting the first kelly and the second kelly is vertical with the axis of trees,
The opening angle for adjusting the first kelly and the second kelly keeps the first kelly and the second kelly tangent with trees, adjusts cross bar
Position keeps it tangent with trees, the perimeter of triangle that is constituted according to the first kelly, the second kelly and cross bar, the first kelly and
The geometrical relationship of opening angle and tree diameters between second kelly, is calculated the diameter of trees.Device needs pass through
Cross bar determines a triangle, although whole device is convenient for carrying, also needs to operate cross bar during actual measurement, not
It is very convenient.
Summary of the invention
The technical problem to be solved in the present invention is designed to provide a kind of measuring device and measuring method of tree breast-height diameter, uses
It is inconvenient to carry to solve existing tree measuring device, complex for operation step, measurement efficiency lower problem when measurement.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of measuring device of tree breast-height diameter, comprising: the first ruler item, the second ruler item and operating case, the first ruler item
One end be flexibly connected with one end of the second ruler item, form the adjustable v-shaped structure of an opening angle, trees are clamped in described
In v-shaped structure, it is provided with angle measurement unit and range unit in the operating case, is measured by the angle measurement unit
The rotational angle of the first ruler item and/or the second ruler item measures the first ruler item and the second ruler item by the range unit
Spacing between junction and trees is provided with data processing equipment in the operating case, according to the rotational angle and institute
Spacing is stated, the measurement result of tree breast-height diameter is obtained.
Preferably, one end of the first ruler item is provided with first gear, and one end of the second ruler item is provided with second
Gear, the first gear are engaged with the second gear.
Preferably, the first gear is identical as the modulus of the second gear so that the first ruler item with it is described
Second ruler item rotates synchronously.
Preferably, the range unit is located at the crosspoint of the first ruler axis and the second ruler axis.
Preferably, the operating case is square body, offers on side and turns for the first ruler item and the second ruler item
The rotational angle range of dynamic rotation slot, the first ruler item and the second ruler item is 0-90 °.
Preferably, first rotating shaft and the second shaft, the first gear and described are provided in the operating case
One end setting of one ruler item rotates in the first rotating shaft, and one end setting of the second gear and the second ruler item exists
Rotated in second shaft, the angle measurement unit be arranged in the first ruler item one end or the second ruler item one
End.
Preferably, operation button and display device, the data processing in the operating case are provided on the operating case
Device includes microprocessor, power module, memory module and communication module, and the data processing equipment is pressed with the operation
Key, display device, angle measurement unit and range unit connection.
Preferably, the range unit be laser range finder, the angle measurement unit be angular transducer, described first
It is provided with data recording equipment on ruler item or the second ruler item, to record data information when measurement.
A kind of measurement method of tree breast-height diameter, comprising steps of
Step 1: the v-shaped structure of measuring device is opened, and make the first ruler item and the second ruler item holding horizontal；
Step 2: rotation the first ruler item and the second ruler item so that the first ruler item and the second ruler item respectively with trees cylinder
It is tangent；
Step 3: obtaining the rotational angle of the first ruler item or the second ruler item and the spacing of range unit and trees, and root
The diameter of a cross-section of a tree trunk 1.3 meters above the ground size of the trees is obtained according to preset formula.
Further, the preset formula includes:
D=(2w cos α+(z cos^2 α)/sin α)/(1-cos α)-z/2
In above formula, w=s-m, d are the diameter of a cross-section of a tree trunk 1.3 meters above the ground size of trees, and α is the rotational angle of the first ruler item or the second ruler item, and s is to survey
Spacing away from device and trees, m be range unit to the first gear center of circle and the second gear center of circle composition line segment straight line away from
From.
Trees are clamped by the first ruler item and the second ruler item, and tangent with trees cylinder, then passes through angle measurement unit
And the data of range unit, what can be read fastly obtains tree breast-height diameter data, at the same user operate it is very convenient, and
Data after measurement can be sent to mobile terminal by the communication module in operating case, not need manually to carry out data record,
Reduce the step of tree breast-height diameter personnel manually record, improves the working efficiency of forest-tree tree breast diameter survey.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for tree breast-height diameter device that one embodiment of the present invention provides；
Fig. 2 is a kind of partial structurtes signal for tree breast-height diameter device operating case that one embodiment of the present invention provides
Figure；
Fig. 3 is the system signal in a kind of tree breast-height diameter device operating case that one embodiment of the present invention provides
Figure；
Fig. 4 is schematic diagram when a kind of tree breast-height diameter device that one embodiment of the present invention provides measures；
Fig. 5 is button operation process when a kind of tree breast-height diameter device that one embodiment of the present invention provides measures
Figure；
Fig. 6 is a kind of tree breast-height diameter method flow diagram that one embodiment of the present invention provides；
Wherein, the 101, first ruler item, the 102, second ruler item, 103, data recording equipment, 104, operating case, 41, rotation slot,
44, ranging is open, 401, first rotating shaft, 402, angle measurement unit, 403, first gear, the 404, second shaft, and 405, second
Gear, 406, range unit.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
Embodiment one
Referring to figs. 1 to Fig. 3, a kind of tree breast-height diameter device is present embodiments provided, comprising: the first ruler item 101, second
Ruler item 102 and operating case 104,
One end of first ruler item 101 is flexibly connected with one end of the second ruler item 102, forms the adjustable V-arrangement of an opening angle
Structure, trees are clamped in v-shaped structure, and angle measurement unit 402 and range unit 406 are provided in operating case 104, is passed through
Angle measurement unit 402 measures the rotational angle of the first ruler item 101 and/or the second ruler item 102, is measured by range unit 406
Spacing between range unit 406 and trees is provided with data processing equipment in operating case 104, according to rotational angle and
Away from obtaining the measurement result of tree breast-height diameter.
First ruler item 101 and the second ruler item 102 may be rotated, and trees are generally cylindrical, when user needs
When measuring trees, both hands hold the first ruler item 101 and the second ruler item 102 respectively, and trees are clipped in the middle, the first ruler item
101 and second ruler item 102 formed a v-shaped structure, the first ruler item 101 and the second ruler item 102 are tangent with trees cylinder respectively,
At this time data can be recorded by angle measurement unit 402 and range unit 406.
In the present embodiment, range unit 406 is arranged in operating case 104, and the first ruler item 101 and the second ruler item 102 have one
A phase contact, this connects and is a little located in operating case 104, and the center of circle of the trees cylinder dot that connects with this is in alignment, ranging
Device 406 needs to be arranged on this straight line.
When not needing to measure, the first ruler item 101 and the second ruler item 102 can with angle can arbitrarily adjust,
Adjustable range is between 0-90 °, i.e., when being in 90 °, the first ruler item 101 and the second ruler item 102 are located on the same line,
When being in 0 °, the first ruler item 101 and the second ruler item 102 connect in parallel.
Compared to other tree breast-height diameter devices, the device Simple portable, user operates also very convenient
Quickly, while data processing equipment is able to record the measurement data of lower angle measuring device 402 and range unit 406, according to
Measurement data quickly generates tree breast-height diameter size, solves the problems, such as to need manually to record trees data, improves forest
The working efficiency of middle tree breast-height diameter.
In a preferable embodiment, one end of the first ruler item 101 is provided with first gear 403, the second ruler item 102
One end be provided with second gear 405, first gear 403 is engaged with second gear 405.
When the rotation of the first ruler item 101, first gear 403 rotates, and second gear 405 can be driven, to make
The rotation of second ruler item 102, similarly, when the second ruler item 102 rotates, this can guarantee the first ruler item 101 and the second ruler item
Linkage between 102 improves the accuracy of measurement.
Further, first gear 403 is identical as the modulus of second gear 405, can guarantee the first ruler item 101 in this way
Rotational angle is identical as the rotational angle of the second ruler item 102, i.e. the first ruler item 101 and the second ruler item 102 rotate synchronously, this is convenient
402 measurement angle of angle measurement unit, i.e., its only need the rotational angle for measuring wherein any one ruler item that can obtain in addition
The rotational angle of one ruler item, while also can be improved precision when measuring tree breast-height diameter.
In a preferable embodiment, range unit 406 is located at 102 axis of 101 axis of the first ruler item and the second ruler item
The crosspoint of line.
It will be noted from fig. 1 that the first ruler item 101 and the second ruler item 102 are all one rectangular, axis is exactly
Rectangular center line, the first ruler item 101 and the second ruler item 102 are rotary, its position meetings of the intersection point of the two axis
As the rotation of ruler item changes, that is, there is the intersection point of multiple and different positions, range unit 406 can be set at any one
On intersection point.
Range unit 406 be arranged on intersection point, can guarantee it is most short with the linear distance of trees, can be accurately obtained with
The distance between trees guarantee the accuracy of data.
In a preferable embodiment, operating case 104 is square body, is offered on side for the first ruler item 101
And second rotation slot 41 that rotates of ruler item 102, the rotational angle range of the first ruler item 101 and the second ruler item 102 is 0-
90°。
Further, be provided with first rotating shaft 401 and the second shaft 404 in operating case 104, first gear 403 and
One end setting of first ruler item 101 rotates in first rotating shaft 401, one end setting of second gear 405 and the second ruler item 102
Rotated in the second shaft 404, angle measurement unit 402 be arranged in the first ruler item 101 one end or the second ruler item 102 one
End.
Meanwhile ranging opening 44 is also equipped on operating case 104, distance is measured for range unit 406.
It can refer to Fig. 2, in Fig. 2, the top of 101 one end of the first ruler item, first gear 403 is arranged in first gear 403
Top be provided with angle measurement unit 402, the top of 102 one end of the second ruler item, the first ruler item is arranged in second gear 405
101 and first gear 403 be all to be rotated in first rotating shaft 401, the second ruler item 102 and second gear 405 be also
It is rotated in second shaft 404, first rotating shaft 401 and the second shaft 404 are erected in operating case 104.
In this way, the rotation that can facilitate gear and ruler item enables a user to rotation without lifting an eyebrow
Ruler item, to carry out using the diameter of a cross-section of a tree trunk 1.3 meters above the ground to measure trees.
In the present embodiment, above-mentioned range unit 406 is laser range finder, and angle measurement unit 402 is angle sensor
Device.
The maximum range of laser range finder is 1800mm, and minimum precision is 1mm, and the maximum range of angular transducer is
360 °, 12 Measurement Resolutions, minimum precision is 0.088 °.
It is provided with data recording equipment 103 on first ruler item 101 or the second ruler item 102, to record data when measurement
Information.
Data recording equipment 103 is connect with the data processing equipment in the present embodiment, is powered by it, and realizes number
According to communication, facilitate the record of data and save backup, wherein rotational angle when data information when measurement includes measurement,
Away from, the type of trees and position etc..
It can refer to Fig. 1 and 3, in the present embodiment, operation button and display device be provided on operating case 104, grasp
Make to be provided with data processing equipment in box 104 comprising microprocessor, power module, memory module and communication module, data
Processing unit is connect with operation button, display device, angle measurement unit 402 and range unit 406.
Wherein display device is liquid crystal display, and microprocessor is singlechip chip, model STM32F103, power supply mould
Block includes battery, power switch and charging interface, and battery is lithium battery, and voltage 3.7V can be supplemented by charging interface
Electricity.
Memory module is the SD storage card of insertable, and communication module is bluetooth, can be carried out with mobile terminal such as mobile phone
The data information that measurement obtains is sent to mobile phone, is user-friendly for data collection and record by communication.
Trees are clamped by the first ruler item and the second ruler item, and tangent with trees cylinder, then passes through angle measurement unit
And the data of range unit, what can be read fastly obtains tree breast-height diameter data, at the same user operate it is very convenient, and
Data after measurement can be sent to mobile terminal by the communication module in operating case, not need manually to carry out data record,
Reduce the step of tree breast-height diameter personnel manually record, improves the working efficiency of forest-tree tree breast diameter survey.
Embodiment two
With reference to Fig. 6, a kind of measurement method of tree breast-height diameter is present embodiments provided, comprising steps of
Step 1: the v-shaped structure of measuring device is opened, and make the first ruler item and the second ruler item holding horizontal；
Step 2: rotation the first ruler item and the second ruler item so that the first ruler item and the second ruler item respectively with trees cylinder
It is tangent；
Step 3: obtaining the rotational angle of the first ruler item or the second ruler item and surveying the connection of the first ruler item and the second ruler item
Spacing between place and trees, and the diameter of a cross-section of a tree trunk 1.3 meters above the ground size of the trees is obtained according to preset formula.
In the present embodiment, measuring device is that the measuring device provided in embodiment one is made by using above-mentioned range unit
The measuring process for obtaining tree breast-height diameter is very simple and convenient, can quickly realize the measurement to tree breast-height diameter, while by default
Formula can guarantee the accuracy of measurement.
Wherein, preset formula is
D=(2w cos α+(z cos^2 α)/sin α)/(1-cos α)-z/2,
Wherein, w=s-m, d are the diameter of a cross-section of a tree trunk 1.3 meters above the ground size of trees, and α is the rotational angle of the first ruler item or the second ruler item, and s is ranging
The spacing of device and trees, m are the linear distance for the line segment that range unit is constituted to the first gear center of circle and the second gear center of circle.
The formula can be derived according to Fig. 4, and in Fig. 4, Z1 indicates that the first ruler item, Z2 indicate the second ruler item, and L is ranging
Device, r1, r2 are respectively the center of circle of first gear and second gear, and x1 is the axis of the first ruler item, and x2 is the second ruler item
Axis.
Data after measurement can be directly displayed in the display device on measuring device operating case, can refer to Fig. 5, when pressing
When key on lower data recording equipment, additionally it is possible to store into memory module the data after measurement, then communication mould can be passed through
Block upload the data to host computer.
The measurement method step is succinct, guarantees that measurement result can be quickly obtained when measurement tree breast-height diameter, passes through simultaneously
Preset formula can also guarantee the accuracy of measurement result, and the data after measurement can save and upload to host computer, facilitate work
It is analyzed as personnel, and has also subtracted the work load for manually recording data.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of measuring device of tree breast-height diameter characterized by comprising the first ruler item, the second ruler item and operating case, it is described
One end of first ruler item is flexibly connected with one end of the second ruler item, forms the adjustable v-shaped structure of an opening angle, trees folder
It holds in the v-shaped structure, angle measurement unit and range unit is provided in the operating case, pass through the angle measurement
Device measures the rotational angle of the first ruler item and/or the second ruler item, measures the first ruler article and the by the range unit
Spacing between the junction and trees of two ruler items is provided with data processing equipment in the operating case, according to the angle of rotation
Degree and the spacing, obtain the measurement result of tree breast-height diameter.
2. a kind of measuring device of tree breast-height diameter according to claim 1, which is characterized in that one end of the first ruler item
It is provided with first gear, one end of the second ruler item is provided with second gear, and the first gear is nibbled with the second gear
It closes.
3. a kind of measuring device of tree breast-height diameter according to claim 2, which is characterized in that the first gear with it is described
The modulus of second gear is identical, so that the first ruler item and the second ruler item rotate synchronously.
4. a kind of measuring device of tree breast-height diameter according to claim 1, which is characterized in that the range unit is located at institute
State the crosspoint of the first ruler axis and the second ruler axis.
5. a kind of measuring device of tree breast-height diameter according to claim, which is characterized in that the operating case is square body,
The rotation slot rotated for the first ruler item and the second ruler item, the first ruler item and described second are offered on its side
The rotational angle range of ruler item is 0-90 °.
6. a kind of measuring device of tree breast-height diameter according to claim 1, which is characterized in that be provided in the operating case
One end of first rotating shaft and the second shaft, the first gear and the first ruler item, which is arranged in the first rotating shaft, to be turned
Dynamic, one end setting of the second gear and the second ruler item rotates in second shaft, the angle measurement dress
Install one end in the first ruler item or one end of the second ruler item.
7. a kind of measuring device of tree breast-height diameter according to claim 1, which is characterized in that be provided on the operating case
Operation button and display device, the data processing equipment in the operating case includes microprocessor, power module, memory module
And communication module, the data processing equipment and the operation button, display device, angle measurement unit and range unit
Connection.
8. a kind of measuring device of tree breast-height diameter according to claim 1, which is characterized in that the range unit is laser
Rangefinder, the angle measurement unit are angular transducer, and data record dress is provided on the first ruler item or the second ruler item
It sets, to record data information when measurement.
9. a kind of measurement method of tree breast-height diameter, which is characterized in that comprising steps of
Step 1: the v-shaped structure of measuring device is opened, and make the first ruler item and the second ruler item holding horizontal；
Step 2: the first ruler item of rotation and the second ruler item, so that the first ruler item is tangent with trees cylinder respectively with the second ruler item；
Step 3: obtaining the rotational angle of the first ruler item or the second ruler item and the spacing of range unit and trees, and according to pre-
If formula obtains the diameter of a cross-section of a tree trunk 1.3 meters above the ground size of the trees.
10. a kind of application method of tree breast-height diameter device according to claim 9, which is characterized in that described default
Formula includes:
D=(2wcos α+(zcos^2 α)/sin α)/(1-cos α)-z/2
In above formula, w=s-m, d are the diameter of a cross-section of a tree trunk 1.3 meters above the ground size of trees, and α is the rotational angle of the first ruler item or the second ruler item, and s is ranging dress
The spacing with trees is set, m is the linear distance for the line segment that range unit is constituted to the first gear center of circle and the second gear center of circle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811434176.2A CN109579762A (en) | 2018-11-28 | 2018-11-28 | A kind of measuring device and measuring method of tree breast-height diameter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811434176.2A CN109579762A (en) | 2018-11-28 | 2018-11-28 | A kind of measuring device and measuring method of tree breast-height diameter |
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| CN201811434176.2A Pending CN109579762A (en) | 2018-11-28 | 2018-11-28 | A kind of measuring device and measuring method of tree breast-height diameter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108184A (en) * | 2019-06-18 | 2019-08-09 | 南开大学 | A kind of linear displacement measurement device |
| CN110645948A (en) * | 2019-08-28 | 2020-01-03 | 浙江农林大学 | Method and system for extracting hyperelliptic parameters of stumpage breast height section |
| CN111707167A (en) * | 2020-04-21 | 2020-09-25 | 浙江农林大学 | Method and device for measuring asymmetrical breast diameter of tree |
| 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 |
| CN116007560A (en) * | 2022-12-13 | 2023-04-25 | 金陵科技学院 | Device and method for rapidly measuring breast diameter of standing tree based on unmanned aerial vehicle |
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| CN209295939U (en) * | 2018-11-28 | 2019-08-23 | 浙江农林大学 | A kind of measuring device of tree breast-height diameter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108184A (en) * | 2019-06-18 | 2019-08-09 | 南开大学 | A kind of linear displacement measurement device |
| CN110645948A (en) * | 2019-08-28 | 2020-01-03 | 浙江农林大学 | Method and system for extracting hyperelliptic parameters of stumpage breast height section |
| CN110645948B (en) * | 2019-08-28 | 2021-05-07 | 浙江农林大学 | Method and system for extracting hyperelliptic parameters of stumpage breast height section |
| CN111707167A (en) * | 2020-04-21 | 2020-09-25 | 浙江农林大学 | Method and device for measuring asymmetrical breast diameter of tree |
| 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 |
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