CN115979228A - Method for measuring forest sample plot boundary and sample wood position - Google Patents
Method for measuring forest sample plot boundary and sample wood position Download PDFInfo
- Publication number
- CN115979228A CN115979228A CN202310235342.0A CN202310235342A CN115979228A CN 115979228 A CN115979228 A CN 115979228A CN 202310235342 A CN202310235342 A CN 202310235342A CN 115979228 A CN115979228 A CN 115979228A
- Authority
- CN
- China
- Prior art keywords
- sample
- rotating part
- module
- mobile
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002023 wood Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 64
- 238000005259 measurement Methods 0.000 claims abstract description 121
- 238000004364 calculation method Methods 0.000 claims description 25
- 238000004891 communication Methods 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 18
- 230000008569 process Effects 0.000 claims description 14
- 238000000691 measurement method Methods 0.000 claims description 10
- 230000004913 activation Effects 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- 210000000481 breast Anatomy 0.000 claims description 4
- 238000011835 investigation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 101100410811 Mus musculus Pxt1 gene Proteins 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 101100379079 Emericella variicolor andA gene Proteins 0.000 description 1
- 101100001677 Emericella variicolor andL gene Proteins 0.000 description 1
- 241000135164 Timea Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to a forest sample land boundary measuring method and a sample wood position measuring method.A electronic positioning pile is fixed at a forest sample land corner point, a mobile computing terminal is horizontally and manually connected, a rotatable mobile measuring terminal carrying two distance measuring modules is used for obtaining the distance between the two distance measuring modules of the mobile measuring terminal and the electronic positioning pile, the position and the distance of the current distance from the electronic positioning pile are marked in real time, and a user is guided to move to a target corner point position. And (3) in the position of the target angular point, the rotating part is vertical to obtain the distance between the two ranging modules of the mobile measuring terminal and the electronic positioning pile, the horizontal distance of the mobile measuring terminal is calculated, the position of the target angular point is determined after repeated debugging, and all angular point measurements of the forest sample plot are completed. And (4) measuring the sample wood position in the determined sample wood boundary, finishing all sample wood measurements according to a preset route by using a mobile measurement terminal, and drawing a fixed sample wood position diagram. The measuring method is simple and reliable in precision, and can greatly improve the measuring efficiency.
Description
Technical Field
The invention relates to the field of Internet of things and geospatial data acquisition, calculation and processing, in particular to a method for measuring forest sample plot boundaries and sample wood positions.
Background
The forest resource survey usually adopts local actual measurement survey instead of whole forest survey, wherein on the basis of a sampling theory, a method for randomly laying survey plots to calculate and calculate the forest stand population is a sampling survey method, and the laid actual measurement plots are called sampling plots (sample plots for short); the method of selecting the actual measurement survey sample plot based on the forest stand average state is a standard survey method, and the actual measurement sample plot laid by the method is called a typical sample plot (referred to as a standard ground for short).
The accurate measurement of the location and area of the sample plot (standard) is a prerequisite for conducting research, and currently, there are three main methods for measuring the boundary of the sample plot (standard). Firstly, the compass method uses the compass survey angle, tape measure or survey line range finding, carries out the accuracy control according to the closed wire method, and it is most extensive to use, and the shortcoming is that the measurement needs the condition of seeing through, consequently must clear away the sheltering from such things as bush, weeds on the sample line, if the topography is complicated or trees shelter from, need add the survey station and change the station and measure, when being greater than 5 to the sample line slope, will use the trigonometric function principle to change the tie, lead to the poor, the flow of overall method precision is complicated and inefficiency. The total station method has the advantages of high precision, fast calculation, high equipment weight and inconvenience in carrying, and the condition of communication is still required. And the GPS and RTK positioning method has the advantages of no need of communication conditions, small equipment, low positioning precision under forests, capability of being used for sample area positioning, and difficulty in meeting precision requirements in measuring position of a boundary and a sample wood.
In view of the above, it is desirable to provide a method for measuring forest sample boundary and sample wood position, which is simple in operation, simple in measurement method, and reliable in precision, and can greatly improve the measurement efficiency.
Disclosure of Invention
The invention aims to provide a method for measuring forest sample land and sample wood position, which is simple in operation, simple in measuring method and reliable in precision and can greatly improve the measuring efficiency.
The above purpose is realized by the following technical scheme: the forest sample plot boundary measuring method comprises four corner points which rotate in the clockwise directionP 1 、P 2 、P 3 AndP 4 ，P 1 andP 2 the distance between them is the width of the same plot,P 2 toP 3 The distance between the two wireless distance measuring modules is the same as the length, the mobile measuring terminal is used for carrying out mobile measurement, the mobile measuring terminal is provided with a mobile measuring module, the mobile measuring module comprises a microprocessor, a first wireless distance measuring module, a second wireless distance measuring module and a first wireless communication module, the mobile measuring terminal comprises a supporting part and a rotating part, the middle part of the rotating part is rotatably connected with the supporting part, the two ends of the rotating part are respectively provided with the first wireless distance measuring module and the second wireless distance measuring module, and the method specifically comprises the following steps:
determining a sample type according to the survey requirement, if the sample type is a new sample and a traditional fixed sample, executing the step (2), and if the sample type is an intelligent fixed sample, executing the step (3);
(2) Corner points of forest plotsP 1 Laying an electronic positioning pile, wherein the electronic positioning pile is provided with a third wireless distance measuring module and a second wireless communication module;
(3) Starting the electronic positioning pile and the mobile measuring terminal, and connecting the mobile measuring terminal with the mobile computing terminal;
(4) The mobile computing terminal searches the electronic positioning pile, and after the electronic positioning pile is activated, connection is established to obtain the position of the electronic positioning pile;
(5) To set the angular points of the electronic spudsP 1 Is taken as the origin of the original point,P 1 andP 2 the direction of the connecting line of the X-axis and the Y-axis,P 1 andP 4 the connecting line direction of the measuring terminal is an X axis, a coordinate system is established, and the measuring terminal is movedP 1 Move to in turnP 2 、P 3 AndP 4 then returns toP 1 During the advancing process, the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are ensured to be at the same level, the distance between the third wireless ranging module and the first wireless ranging module and the distance between the third wireless ranging module and the second wireless ranging module are measured, the mobile computing terminal computes the slant distance from the electronic positioning pile to the center of the rotating part and the abscissa or the ordinate of the center of the rotating part and determines whether the electronic positioning pile is in a forest sample plot, and the mobile computing terminal recordsP 2 、P 3 AndP 4 the position coordinates of (a);
wherein, fromP 1 Move toP 2 In the advancing process, calculating the abscissa of the center of the rotating part, keeping the direction movement of the abscissa with the value of 0, when the calculated slant distance from the electronic positioning pile to the center of the rotating part is equal to the sample width and the abscissa is 0, rotating the rotating part to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, calculating the ordinate of the mobile measuring terminal projected to the horizontal plane by the mobile calculating terminal, and determining the ordinate of the mobile measuring terminal projected to the horizontal planeP 2 The position of (a);
fromP 2 Move toP 3 During the advancing process, calculating the vertical coordinate of the center of the rotating part, keeping the value of the vertical coordinate moving in the width direction of a sample plot, when the calculated slant distance from the electronic positioning pile to the center of the rotating part is equal to the length of the bevel edge of a forest sample plot and the value of the vertical coordinate is the width of the sample plot, rotating the rotating part to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, calculating the horizontal coordinate of the mobile measuring terminal after the mobile measuring terminal projects to the horizontal plane by the mobile calculating terminal, and determining the horizontal coordinateP 3 The position of (a);
fromP 3 Move toP 4 During the advancing process, calculating the abscissa of the center of the rotating part, keeping the value of the abscissa as the direction of the sample plot length to move, when the calculated slant distance from the electronic positioning pile to the center of the rotating part is equal to the sample plot length and the abscissa is the sample plot length, rotating the rotating part to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, calculating by the mobile calculating terminal that the mobile measuring terminal projects to the horizontal plane, and then moving the mobile calculating terminal in the direction of the sample plot lengthIs determined by the ordinateP 4 The position of (a);
fromP 4 Move toP 1 Calculating the ordinate of the center of the rotating part and keeping the ordinateP 3 And withP 4 Is moved in the direction of 0 and finally returns toP 1 And (6) position, completing the boundary measurement.
The further technical scheme is that the position of the third wireless ranging module is set as a in the step (5), the position of the first wireless ranging module is set as B, the position of the second wireless ranging module is set as C, and a calculation formula of the slant distance from the electronic positioning pile to the center of the rotating part is as follows:
In the calculation formula of the present invention, it is set that when the center of the rotating part is on the sample plot boundary, the position of the first wireless ranging module, that is, the position B, is outside the sample plot, and when the rotating part rotates vertically, the first wireless ranging module is above the second wireless ranging module, that is, the position B is above the position C;
the further technical proposal is that in the step (5), the stepP 1 Move toP 2 AndP 3 move toP 4 The formula for calculating the abscissa of the center of the rotating part during traveling is:
The further technical proposal is that in the step (5), the stepP 2 Move toP 3 AndP 4 move toP 1 The formula for calculating the abscissa of the center of the rotating part during travel is:
The further technical proposal is that in the step (5), the determination is carried outP 2 AndP 4 calculation formula of vertical coordinate after position-shifting measurement terminal is projected to horizontal plane and determinationP 3 The calculation formula of the abscissa projected to the horizontal plane by the mobile measuring terminal at the position is as follows:
further, the calculation formula for determining whether the center of the rotating part is in the forest plot in the step (5) is as follows:
The further technical proposal is that in the step (5)P 2 、P 3 AndP 4 further comprising the step of calibrating, determiningP 2 AndP 4 at the time of position, calculatingP 2 AndP 4 after the ordinate, the difference between the width of the sample plot and the ordinate at that time is calculated, and the calculation formula is as follows:
DeterminingP 3 At the time of position, calculatingP 3 After the abscissa of (a), the difference between the sample length and the abscissa at that time is calculated by the following formula:
The further technical proposal is that the determination in the step (5)P 4 After the position, the rotating part is rotated to the horizontal position, the position is moved and adjusted, the slope distance from the electronic positioning pile to the center of the rotating part is determined to be equal to the same sample length, meanwhile, the position with the ordinate of 0 is determined, and the position is determined to beP 4 ' calculating the closing difference of the forest sample plot, wherein the closing difference of the forest sample plot isP 4 AndP 4 ' if the closing difference meets the predetermined sample measurement accuracy requirement, the measurement terminal is moved in step (5)P 4 Is moved toP 1 And the measurement of forest plot boundary is completed,if the requirement of the precision of the same-mode measurement cannot be met, the step (5) is executed again until the requirement of the precision is met.
And (5) moving the mobile measuring terminal to the middle of the breast diameter of the sample wood on the boundary wood on the travel route, judging whether the boundary wood is in the forest sample land, and marking the boundary wood.
The mobile measuring terminal further comprises a microprocessor and a storage module, the microprocessor stores the acquired wireless ranging signals and the azimuth angle and inclination angle parameters of the electronic compass module through the storage module, the mobile measuring terminal is in communication connection with a mobile computing terminal through a data interface or a first wireless communication module, and the mobile computing terminal is used for acquiring data of the storage module and performing data computation in the step (5).
The mobile computing terminal is provided with a sample plot measuring system which is used for completing connection activation of the mobile measuring terminal and the electronic positioning pile, sample plot boundary setting, measurement and inspection and sample wood position measurement.
Further technical means is that the sample measurement system includes:
the mobile measuring terminal connecting module: the mobile measuring terminal is used for acquiring measurement parameters acquired by the mobile measuring terminal in real time by connecting the mobile computing terminal with the mobile measuring terminal through a wireless or wired mode;
electronic spud scanning activation module: the wireless positioning pile module is used for finding surrounding electronic positioning piles through wireless scanning by the mobile computing terminal, sending a specific signal or keyword after connection, and awakening the whole circuit of the wireless positioning pile module;
measurement pattern setting module: the system is used for setting coordinates of a sample plot corner point, a sample plot type and sample plot length and width;
a plot boundary measurement module: measuring corners and sample plot types determined during sample plot setting, acquiring measurement parameters of a mobile measurement terminal in real time, and calculating to complete sample plot boundary measurement, sample plot boundary wood judgment and sample plot corner positioning according to a forest sample plot boundary measurement method;
a plot boundary precision inspection module: calculating sample plot measurement accuracy by combining the calculated closing difference of the forest sample plots and the sample plot types set by the measurement sample plots;
a plot boundary measurement module: by acquiring the measurement parameters of the mobile measurement terminal in real time, the azimuth angle, the inclination angle, the slant distance and the horizontal distance of all the samples in the sample plot are calculated and measured according to the forest sample plot position measurement method.
The invention also provides a method for measuring the position of the sample wood, so as to achieve the purposeP 1 The method comprises the following steps that the mobile measuring terminal travels along a preset route as a starting point, all sample woods in the forest sample land boundary measured by the forest sample land boundary measuring method are measured one by one, and the mobile measuring terminal is provided with an electronic compass module and comprises the following steps:
(1) When the electronic positioning pile reaches a sample wood to be measured, horizontally placing a rotating part of the mobile measuring terminal, ensuring that a first wireless ranging module and a second wireless ranging module at two ends of the rotating part are at the same level, and recording the slant distance from the electronic positioning pile to the center of the rotating part in real time;
(2) Horizontally moving the mobile measuring terminal along the breast-height diameter of the sample wood to enable the distance between the third wireless distance measuring module and the first wireless distance measuring module to be equal to that between the third wireless distance measuring module and the second wireless distance measuring module, wherein the slant distance from the electronic positioning pile to the center of the rotating part is the slant distance of the sample wood, and the angle of the electronic compass module is read as the azimuth angle of the sample wood;
(3) Keeping the position of the mobile measuring terminal still, enabling the rotating part to rotate to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, measuring the distance between the third wireless ranging module and the first wireless ranging module and the distance between the third wireless ranging module and the second wireless ranging module again, and calculating the horizontal distance and the inclination angle between the mobile measuring terminal and the electronic positioning pile after the mobile measuring terminal projects to the horizontal plane by the mobile calculating terminal;
(4) And marking the tested sample wood, and sequentially finishing the measurement of all sample wood in the sample plot.
A further technical scheme is that, in the step (3), the horizontal distance between the projection of the mobile measurement terminal on the horizontal plane and the electronic positioning pile is the horizontal distance between the electronic positioning pile and the sample wood, the center of the rotating part is set as D, and the calculation formulas of the horizontal distance between the projection of the mobile measurement terminal on the horizontal plane and the electronic positioning pile and the inclination angle are as follows:
In the forest sample plot boundary measurement, an electronic positioning pile carrying a distance measurement module and a wireless communication module is fixed at a forest sample plot corner point, a mobile computing terminal is horizontally connected in a handheld mode, a rotatable mobile measurement terminal carrying two distance measurement modules and an electronic compass module is carried, and the mobile computing terminal marks the position and the distance of the current distance from the electronic positioning pile in real time, draws a travelling route and a travelling direction, marks information such as whether the electronic positioning pile is in the forest sample plot or not and guides a user to travel to the position of a target corner point by acquiring the angle of the electronic compass module of the mobile measurement terminal and the distance between the two distance measurement modules and the electronic positioning pile. And at the position of the target angular point, rotating the rotating part to be vertical by 90 degrees, calculating the horizontal distance of the mobile measuring terminal by the mobile calculating terminal through acquiring the angle of the electronic compass module of the mobile measuring terminal, the horizontal distances of the two ranging modules and the electronic positioning pile, and determining the position of the target angular point after repeated debugging. And the user moves in sequence according to the prompt of the mobile computing terminal to complete the measurement of all the corner points of the forest sample plot.
And measuring the position of the sample wood, namely moving the hand-held mobile measuring terminal to the front of the sample wood according to a predetermined route (zigzag route) according to the determined sample boundary, placing the hand-held mobile measuring terminal at the breast diameter of the sample wood, measuring the slant distance and the azimuth angle, rotating the rotating part to the vertical state, measuring the horizontal distance and the slant angle, sequentially completing the measurement of all the sample wood, and drawing a fixed sample wood position diagram.
Compared with the prior art, the invention has the following advantages:
1. the measurement accuracy is higher: the distance measurement result is mainly determined by the precision of distance measurement, the UWB wireless distance measurement precision can reach 0.1 meter, and the measurement precision requirements of sample plot boundaries and sample wood positions in forestry investigation planning design are met;
2. the measurement flow is simple, and the measurement efficiency is greatly improved: fixing an electronic positioning pile at a certain corner point of a tested sample land, holding by hand and advancing to a target corner point according to the prompting direction of a mobile computing terminal, judging whether the sample land is in the sample land or not by using the mobile computing terminal when a boundary wood meets, rotating the rotating part of the mobile measuring terminal to 90 degrees, and determining the horizontal distance of the target corner point. The measurement process does not need visual conditions, wire cutting and compass operation are omitted, the workload of the original 3 persons can be independently completed by only one person, the measurement is quick and simple, and the measurement efficiency is greatly improved;
3. the method can be used for rapidly measuring the conditions of complex terrain, sample wood and shrub shielding and the like: the method provided by the invention uses a wireless communication mode, can carry out measurement under a non-visual condition, has strong adaptability to the measurement under the conditions of complex terrain, sample wood, shrub shielding and the like, and does not need to increase the workload.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of an electronic spud according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mobile measurement terminal according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating forest plot boundary measurements according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of forest plot level measurement according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of a forest-plot vertical measurement according to an embodiment of the present invention;
FIG. 6 is a block diagram of a sample measurement system according to an embodiment of the present invention;
FIG. 7 is a schematic view of a sample wood measurement process according to an embodiment of the present invention;
FIG. 8 is a schematic view of a sample wood level measurement according to an embodiment of the present invention;
fig. 9 is a schematic view of vertical measurement of a sample wood according to an embodiment of the present invention.
In the figure:
1 electronic positioning pile, 2 mobile measurement terminals, 3 sample wood and 4 forest sample land
11 pile body 12 wireless positioning pile module 13 third wireless ranging antenna
21 first radio ranging antenna 22 second radio ranging antenna 23 rotating part
24 moving measurement module 25 supporting part 26 pin shaft
Description of the preferred embodiment
The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.
The embodiment of the invention is as follows, and referring to fig. 3 to 5, a method for measuring the forest sample plot, wherein the forest sample plot is rectangular or square and comprises four corner points, and the four corner points are respectively in the clockwise rotation directionP 1 、P 2 、P 3 AndP 4 ，P 1 and withP 2 The distance between them is the width of the same plot,P 2 toP 3 The distance between the two mobile measuring terminals is the same sample size length, the mobile measuring terminal 2 is used for carrying out mobile measurement, the mobile measuring terminal 2 is provided with a mobile measuring module, the mobile measuring module comprises a microprocessor, a first wireless distance measuring module, a second wireless distance measuring module and a first wireless communication module, the mobile measuring terminal 2 comprises a supporting part and a rotating part, the middle part of the rotating part is rotatably connected with the supporting part, the two ends of the rotating part are respectively provided with the first wireless distance measuring module and the second wireless distance measuring module, and the method specifically comprises the following steps:
determining a sample type according to the investigation requirement, if the sample type is a new sample setting and a traditional fixed sample, executing the step (2), and if the sample type is an intelligent fixed sample, executing the step (3);
the sample plot which is newly set at this time is a newly set sample plot, wherein the sample plot is not set before; the method comprises the steps that an electronic positioning pile 1 is already set up, and the sample plot needing to be reset again at this time is a traditional fixed sample plot; the method comprises the steps that an electronic positioning pile 1 is arranged, and the sample plot needing to be reset again at this time is an intelligent fixed sample plot;
(2) Corner points of forest plotsP 1 An electronic positioning pile 1 is arranged, and the electronic positioning pile 1 is provided with a third wireless distance measuring module and a second wireless communication module;
(3) Starting the electronic positioning pile 1 and the mobile measuring terminal 2, and connecting the mobile measuring terminal 2 with the mobile computing terminal;
(4) The mobile computing terminal searches the electronic positioning pile 1, and after the electronic positioning pile 1 is activated, connection is established to obtain the position of the electronic positioning pile 1;
(5) To set the angular point of the electronic spud 1P 1 Is taken as the origin of the original point,P 1 andP 2 the direction of the connecting line of the X-axis and the Y-axis,P 1 andP 4 is taken as the X axis, a coordinate system is established, and the measuring terminal 2 is movedP 1 Move to in turnP 2 、P 3 AndP 4 then returns toP 1 As shown in fig. 3 and 5,L 1 、L 2 、L 3 andL 4 the first boundary, the second boundary, the third boundary and the fourth boundary of the forest sample plot in sequence, and the length of the sample plot and the width of the sample plot are determined when the sample plot is set.
In the advancing process, as shown in fig. 4, the first wireless distance measuring module and the second wireless distance measuring module at two ends of the rotating part are ensured to be at the same level, the distance between the third wireless distance measuring module and the first wireless distance measuring module and the distance between the third wireless distance measuring module and the second wireless distance measuring module are measured, the mobile computing terminal calculates the slant distance from the electronic positioning pile 1 to the center of the rotating part and the abscissa or the ordinate of the center of the rotating part, and determines whether the distance is in a forest sample plot or not, and the mobile computing terminal is movedRecordingP 2 、P 3 AndP 4 the position coordinates of (a);
wherein, fromP 1 Move toP 2 In the advancing process, calculating the abscissa of the center of the rotating part, keeping the direction with the value of the abscissa as 0 to move, when the calculated slant distance from the electronic positioning pile 1 to the center of the rotating part is equal to the width of the sample plot and the abscissa is 0, as shown in fig. 5, the rotating part rotates to be vertically arranged, the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are ensured to be in the vertical direction, the mobile calculating terminal calculates the ordinate of the mobile measuring terminal 2 after being projected to the horizontal plane, and the ordinate is determinedP 2 The position of (a);
fromP 2 Move toP 3 In the advancing process, calculating the ordinate of the center of the rotating part, keeping the value of the ordinate moving in the width direction of the sample plot, when the calculated slant distance from the electronic positioning pile 1 to the center of the rotating part is equal to the length of the bevel edge of the forest sample plot and the value of the ordinate is the width of the sample plot, as shown in fig. 5, the rotating part rotates to be vertically arranged, the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are ensured to be in the vertical direction, the mobile calculating terminal calculates the abscissa of the mobile measuring terminal 2 projected to the horizontal plane, and determines the abscissaP 3 The position of (a);
fromP 3 Move toP 4 During the moving process, calculating the abscissa of the center of the rotating part, keeping the value of the abscissa as the direction of the same sample length to move, when the calculated slant distance from the electronic positioning pile 1 to the center of the rotating part is equal to the same sample length and the abscissa is the same sample length, as shown in fig. 5, the rotating part rotates to be vertically arranged, the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are ensured to be in the vertical direction, the mobile computing terminal calculates the ordinate of the mobile measuring terminal 2 after being projected to the horizontal plane, and the ordinate is determinedP 4 The position of (a);
fromP 4 Move toP 1 During the moving process, calculating the ordinate of the center of the rotating part and keepingP 3 And withP 4 Is moved in the direction of the ordinate whose value is 0 and finally returns toP 1 And (6) position, completing the boundary measurement.
In the context of figure 5, it is shown,A 1 、A 2 、A 3 andA 4 is the point behind the projection of the mobile measuring terminal 2 onto the horizontal plane.
As shown in fig. 3, in the step (5), the position of the third wireless ranging module is set to be a, the position of the first wireless ranging module is set to be B, the position of the second wireless ranging module is set to be C, and a calculation formula of the slant distance from the electronic spud 1 to the center of the rotating part is as follows:
It should be noted that, as shown in fig. 4 and 5, in the calculation formula of the present invention, when the center of the rotating part is on the sample plot boundary, the position of the first wireless ranging module, that is, the position B, is outside the sample plot, and after the rotating part rotates vertically, the first wireless ranging module is above the second wireless ranging module, that is, the position B is above the position C;
as shown in FIG. 4, the step (5) is fromP 1 Move toP 2 AndP 3 move toP 4 The formula for calculating the abscissa of the center of the rotating part during travel is:
As shown in fig. 4, the step (5) is selected fromP 2 Move toP 3 AndP 4 move toP 1 The formula for calculating the abscissa of the center of the rotating part during traveling is:
In said step (5), as shown in FIG. 5, it is determinedP 2 AndP 4 formula for calculating and determining the vertical coordinate of the mobile measuring terminal 2 projected on the horizontal plane at the time of positionP 3 The calculation formula of the abscissa of the mobile measuring terminal 2 projected to the horizontal plane at the position is as follows:
in another embodiment of the present invention based on the above embodiment, the calculation formula for determining whether the rotating part center is in the forest plot in step (5) is:
On the basis of the above embodiment, in another embodiment of the present invention, the step (5) isP 2 、P 3 AndP 4 further comprising the step of calibrating, determiningP 2 AndP 4 at the time of position, calculatingP 2 AndP 4 and then calculating the difference between the sample width and the ordinate at that time, the calculation formula is as follows:
DeterminingP 3 At the time of position, calculatingP 3 After the abscissa of (a), the difference between the sample plot length and the abscissa at that time is calculated by the following formula:
On the basis of the above embodiment, in another embodiment of the present invention, the determination in the step (5)P 4 After the position, the rotating part is rotated to the horizontal, the position is moved and adjusted, the position of the electronic positioning pile 1, the slant distance of which from the center of the rotating part is equal to the same sample length, and the position of which the ordinate is 0 is determinedP 4 ' calculating the closing difference of the forest sample plot, wherein the closing difference of the forest sample plot isP 4 AndP 4 ' if the closing difference meets the predetermined sample measurement accuracy requirement, the measuring terminal 2 is moved in step (5)P 4 Is moved toP 1 And (5) finishing forest sample land boundary measurement, and if the forest sample land boundary measurement does not meet the preset sample land measurement accuracy requirement, re-executing the step (5) until the accuracy requirement is met.
In another embodiment of the present invention, in addition to the above embodiment, in the step (5), the mobile measuring terminal 2 is moved to the middle of the breast diameter of the sample wood on the travel route, and whether the sample wood is in the forest sample area is determined, and the outside wood is marked.
The mobile measuring terminal 2 further comprises a microprocessor and a storage module, wherein the microprocessor stores the acquired wireless ranging signals and the azimuth angle and inclination angle parameters of the electronic compass module through the storage module, the mobile measuring terminal 2 is in communication connection with a mobile computing terminal through a data interface or a first wireless communication module, and the mobile computing terminal is used for acquiring data of the storage module and performing data calculation in the step (5).
Specifically, the first wireless ranging module and the second wireless ranging module of the mobile measuring terminal 2 are respectively provided with a first wireless ranging antenna 21 and a second wireless ranging antenna 22, and the rotating part 23 is connected with the supporting part 25 through a pin 26.
The mobile measuring terminal 2 comprises a mobile measuring module 24, the mobile measuring module 24 comprises a shell and a PCB circuit board, the PCB circuit board comprises a microprocessor, a first wireless distance measuring module, a second wireless distance measuring module, a power supply module, a first wireless communication module, a storage module, a data interface, a timer and an electronic compass module, and the microprocessor internally comprises a memory, a counter, an A/D conversion module and the like and is used for completing the calculation, storage and control of data measurement; the invention recommends using UWB signal emission module to emit radio signal as ultra-wide baseband pulse; the first wireless communication module is connected with the mobile computing terminal by using a USB wire or wireless protocols such as wifi, bluetooth, lora and the like; the power module consists of a lithium battery, a power management chip and a switch and provides power for the microprocessor; the storage module stores the data recorded by the microprocessor; the data interface is used for connecting a mobile computing terminal, acquiring the measurement information of the mobile measurement module 24, and can also be used for development, test or field problem processing; the timer is used for providing high-precision timing; the electronic compass module is used for acquiring parameters of a current azimuth angle and an inclination angle.
The mobile computing terminal refers to a smart device equipped with a sample measurement system and having computing, storage and network communication functions, and includes but is not limited to a smart phone, a tablet, a notebook and a mobile workstation.
When the mobile measuring module 24 works, the mobile computing terminal is connected with the mobile measuring module 24 through a wireless signal or a data interface, the mobile computing terminal is connected with the wireless positioning pile through a wireless signal, the microprocessor of the mobile measuring module 24 stores the acquired signal acquired by the wireless distance measuring module and the azimuth angle and inclination angle parameters of the electronic compass module through the storage module and transmits the stored signals to the mobile computing terminal through the data interface or the wireless communication module, the mobile computing terminal calculates the azimuth angle and inclination angle of the mobile measuring terminal 2 and the distance between the mobile measuring terminal and the electronic positioning pile 1 through signal processing and TOF algorithm, obtains the current skew distance, horizontal coordinates and vertical coordinates of the mobile measuring terminal 2 through the horizontal and vertical rotating part 23, and judges whether the information is in a sample plot.
The mobile computing terminal is provided with a sample plot measuring system which is used for completing connection activation of the mobile measuring terminal 2 and the electronic positioning pile 1, sample plot boundary setting, measurement and inspection and sample wood position measurement, and the functions comprise mobile measuring terminal connection, electronic positioning pile scanning activation, measurement sample plot setting, sample plot boundary measurement, sample plot boundary precision inspection and sample wood position measurement.
As shown in fig. 6, the sample measurement system includes:
the mobile measuring terminal is connected with the module: the system is used for the mobile computing terminal to be connected with the mobile measuring terminal 2 through wireless or wired connection and to obtain the measuring parameters collected by the mobile measuring terminal 2 in real time;
electronic spud scanning activation module: the wireless positioning pile module is used for finding surrounding electronic positioning piles through wireless scanning by the mobile computing terminal, sending a specific signal or keyword after connection, and awakening the whole circuit of the wireless positioning pile module;
measurement pattern setting module: the system is used for setting coordinates of a sample plot corner point, a sample plot type, and setting the length and width of a sample plot;
a plot boundary measurement module: the method comprises the steps of measuring corner points and sample plot types determined during sample plot setting, acquiring measurement parameters of the mobile measurement terminal 2 in real time, and calculating and finishing sample plot boundary measurement, sample plot boundary wood judgment and sample plot corner point positioning according to a forest sample plot boundary measurement method;
a plot boundary precision inspection module: calculating sample plot measurement accuracy by combining the calculated closing difference of the forest sample plots and the sample plot types set by the measurement sample plots;
a plot boundary measurement module: by acquiring the measurement parameters of the mobile measurement terminal 2 in real time, the azimuth angles, the inclination angles, the slant distances and the horizontal distances of all the sample trees in the sample plot are calculated and measured according to the forest sample plot position measurement method.
Referring to fig. 1, the electronic spud 1 is composed of a spud body 11, a wireless spud module 12 and a third wireless ranging antenna 13. The electronic positioning pile 1 is fixed on the ground by the pile body 11, and the wood pile, the aluminum alloy, the PVC pipe and the like are convenient to carry and can be made of materials for long-term storage.
The wireless positioning pile module 12 comprises a shell and a PCB circuit board, wherein the PCB circuit board comprises a microprocessor, a third wireless distance measuring module, a power supply module, a second wireless communication module, a monitoring module, a storage module, a data interface and a timer. The microprocessor comprises a memory, a counter, an A/D converter and the like, and completes the calculation, storage and control of data measurement; the third wireless ranging module sends and receives radio signal broadcasting module parameters, and is connected with a third wireless ranging antenna 13; the power module consists of a lithium battery, a power management chip and a switch and provides power for the microprocessor; the second wireless communication module is connected with the mobile measuring terminal 2 by using a USB wire or wireless protocols such as wifi, bluetooth and lora; the storage module stores the data recorded by the microprocessor; the data interface is used for development, testing or field problem processing; the monitoring module provides monitoring service in a low-power-consumption running state of the wireless positioning pile module 12, and awakens the whole circuit of the wireless positioning pile module 12 when receiving a specific signal or keyword; the timer is used for providing high-precision timing.
When the wireless positioning pile module 12 is in a low-power-consumption operation state, only the monitoring module is operated, and when a specific signal or a keyword broadcasted by the mobile measuring terminal 2 is received, the whole circuit of the wireless positioning pile module 12 is awakened. The mobile measuring terminal 2 is connected with the wireless positioning pile module 12 through a wireless signal, the distance between the mobile measuring terminal 2 and the electronic positioning pile 1 is calculated through a TOF algorithm, and the slant distance and the azimuth angle of the wireless positioning pile module 12 are obtained through horizontally rotating the mobile measuring terminal 2. After the mobile measuring terminal 2 is disconnected from the wireless positioning pile module 12, after a preset fixed time, the wireless positioning pile module 12 is in a dormant state, and only the monitoring module is in a working state.
The third wireless ranging antenna 13 is a signal amplification device of a third wireless ranging module for ranging, and the first wireless ranging module, the second wireless ranging module and the third wireless ranging module recommend the UWB wireless ranging module to be used in the invention, and the wireless ranging precision can reach 0.1 meter.
The invention also provides a method for measuring the position of the sample wood, which comprises the following steps: as shown in FIGS. 7 to 9, toP 1 For the starting point, the mobile measuring terminal 2 travels according to the predetermined route, all the sample woods in the forest sample plot boundary measured by the measuring method of the forest sample plot boundary are measured one by one, the mobile measuring terminal 2 is provided with an electronic compass module, and the method comprises the following steps:
(1) When the electronic positioning pile reaches a tested sample wood, the rotating part of the mobile measuring terminal 2 is horizontally placed, the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are ensured to be at the same level, and the slant distance from the electronic positioning pile 1 to the center of the rotating part is recorded in real time;
(2) Horizontally moving the mobile measuring terminal 2 along the breast-height diameter of the sample wood to enable the distance between the third wireless distance measuring module and the first wireless distance measuring module to be equal to the distance between the third wireless distance measuring module and the second wireless distance measuring module, wherein the slant distance from the electronic positioning pile 1 to the center of the rotating part is the slant distance of the sample wood, and the angle of the electronic compass module is read as the azimuth angle of the sample wood; the calculation mode is the same as the mode of forest sample plot boundary measurement;
(3) Keeping the position of the mobile measuring terminal 2 still, enabling the rotating part to rotate to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, measuring the distance between the third wireless ranging module and the first wireless ranging module and the distance between the third wireless ranging module and the second wireless ranging module again, and calculating the horizontal distance and the inclination angle between the mobile measuring terminal 2 projected to the horizontal plane and the electronic positioning pile 1 by the mobile calculating terminal;
at this moment, the horizontal distance between the projection of the mobile measurement terminal 2 to the horizontal plane and the electronic positioning pile 1 is the horizontal distance between the electronic positioning pile 1 and the sample wood, the center of the rotating part is set as D, and the calculation formulas of the horizontal distance between the projection of the mobile measurement terminal 2 to the horizontal plane and the electronic positioning pile 1 and the inclination angle are as follows:
(4) And marking the tested sample wood by using chalk or red paint, and sequentially finishing the measurement of all sample wood in the sample plot.
It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention.
Claims (14)
1. A method for measuring the boundary of a forest sample plot comprises four corner points which rotate clockwiseP 1 、P 2 、P 3 AndP 4 ，P 1 andP 2 the distance between them is the width of the same land,P 2 toP 3 The distance between the two measuring modules is the length of the sample plot, and the method is characterized in that the mobile measuring terminal is used for mobile measurement, the mobile measuring terminal is provided with a mobile measuring module, and the mobile measuring module comprises a microprocessor, a first wireless ranging module, a second wireless ranging module and a first wireless ranging moduleThe line communication module, the removal measurement terminal includes supporting part and rotating part, the middle part of rotating part with the supporting part rotates and connects, the both ends of rotating part are equipped with respectively first wireless ranging module and the wireless ranging module of second specifically include following step:
determining a sample type according to the investigation requirement, if the sample type is a new sample setting and a traditional fixed sample, executing the step (2), and if the sample type is an intelligent fixed sample, executing the step (3);
(2) Corner points of forest plotsP 1 Arranging an electronic positioning pile, wherein the electronic positioning pile is provided with a third wireless distance measuring module and a second wireless communication module;
(3) Starting the electronic positioning pile and the mobile measuring terminal, and connecting the mobile measuring terminal with the mobile computing terminal;
(4) The mobile computing terminal searches the electronic positioning pile, and after the electronic positioning pile is activated, connection is established to obtain the position of the electronic positioning pile;
(5) To set the angular points of the electronic spudsP 1 Is taken as the origin point of the image,P 1 andP 2 the direction of the connecting line of the X-axis and the Y-axis,P 1 andP 4 the connecting line direction of the measuring terminal is an X axis, a coordinate system is established, and the measuring terminal is movedP 1 Move in turn toP 2 、P 3 AndP 4 then returns toP 1 During the advancing process, the first wireless ranging module and the second wireless ranging module at two ends of the rotating part are ensured to be at the same level, the distance between the third wireless ranging module and the first wireless ranging module and the distance between the third wireless ranging module and the second wireless ranging module are measured, the mobile computing terminal computes the slant distance from the electronic positioning pile to the center of the rotating part and the abscissa or the ordinate of the center of the rotating part and determines whether the electronic positioning pile is in a forest sample plot, and the mobile computing terminal recordsP 2 、P 3 AndP 4 the position coordinates of (a);
wherein, fromP 1 Move toP 2 During the travel, the abscissa of the center of the rotating part is calculated, and the rotating part is moved in a direction in which the abscissa value is maintained at 0, and when the calculated electron is detectedWhen the slant distance from the positioning pile to the center of the rotating part is equal to the width of the sample plot and the abscissa is 0, the rotating part rotates to be vertically arranged, the first wireless distance measuring module and the second wireless distance measuring module at the two ends of the rotating part are ensured to be in the vertical direction, the mobile computing terminal computes the ordinate of the mobile measuring terminal after the mobile measuring terminal projects to the horizontal plane, and the ordinate is determinedP 2 The position of (a);
fromP 2 Move toP 3 During the advancing process, calculating the vertical coordinate of the center of the rotating part, keeping the value of the vertical coordinate moving in the width direction of a sample plot, when the calculated slant distance from the electronic positioning pile to the center of the rotating part is equal to the length of the bevel edge of a forest sample plot and the value of the vertical coordinate is the width of the sample plot, rotating the rotating part to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, calculating the horizontal coordinate of the mobile measuring terminal after the mobile measuring terminal projects to the horizontal plane by the mobile calculating terminal, and determining the horizontal coordinateP 3 The position of (a);
fromP 3 Move toP 4 In the advancing process, calculating the abscissa of the center of the rotating part, keeping the value of the abscissa as the direction movement of the sample plot length, when the calculated slant distance from the electronic positioning pile to the center of the rotating part is equal to the sample plot length and the abscissa is the sample plot length, rotating the rotating part to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, calculating the ordinate of the mobile measuring terminal after being projected to the horizontal plane by the mobile calculating terminal, and determining the ordinate of the mobile measuring terminal after being projected to the horizontal planeP 4 The position of (a);
fromP 4 Move toP 1 Calculating the ordinate of the center of the rotating part and keeping the ordinateP 3 AndP 4 is moved in the direction of 0 and finally returns toP 1 And (6) position, completing the boundary measurement.
2. The method as claimed in claim 1, wherein the step (5) sets the position of the third wireless ranging module as a, the position of the first wireless ranging module as B, the position of the second wireless ranging module as C, and the calculation formula of the slant distance from the electronic spud to the center of the rotating part is as follows:
3. A method as claimed in claim 2, wherein step (5) is performed from the measurement of forest plot boundariesP 1 Move toP 2 AndP 3 move toP 4 The formula for calculating the abscissa of the center of the rotating part during traveling is:
4. A method as claimed in claim 3, wherein step (5) is performed from the measurement of forest plot boundariesP 2 Move toP 3 AndP 4 move toP 1 The formula for calculating the abscissa of the center of the rotating part during traveling is:
5. A forest plot boundary as claimed in claim 4The measuring method is characterized in that in the step (5), the determination is carried outP 2 AndP 4 formula for calculating vertical coordinate after position-shifting measurement terminal is projected to horizontal plane and determiningP 3 The calculation formula of the abscissa projected to the horizontal plane by the mobile measuring terminal at the position is as follows:
6. the method for measuring the forest land boundary according to any one of claims 1 to 5, wherein the calculation formula for determining whether the center of the rotating part is in the forest land in the step (5) is as follows:
7. A method as claimed in claim 6, wherein step (5) is carried out in a forest plot boundary measurement methodP 2 、P 3 AndP 4 further comprising the step of calibrating, determiningP 2 AndP 4 at the time of position, calculatingP 2 AndP 4 after the ordinate, the difference between the width of the sample plot and the ordinate at that time is calculated, and the calculation formula is as follows:
DeterminingP 3 At the time of position, calculatingP 3 After the abscissa of (a), the difference between the sample plot length and the abscissa at that time is calculated by the following formula:
8. A forest land boundary measurement method as claimed in claim 7, characterized in that in step (5) the determination is madeP 4 After the position, the rotating part is rotated to the horizontal position, the position is moved and adjusted, the slope distance from the electronic positioning pile to the center of the rotating part is determined to be equal to the same sample length, meanwhile, the position with the ordinate of 0 is determined, and the position is determined to beP 4 ', calculating the closing difference of the forest sample plot, the closing difference of the forest sample plot isP 4 AndP 4 ' if the closing difference meets the predetermined sample measurement accuracy requirement, the measurement terminal is moved in step (5)P 4 Is moved toP 1 And (5) completing forest sample plot boundary measurement, and if the preset sample plot measurement precision requirement is not met, re-executing the step (5) until the precision requirement is met.
9. The method as claimed in claim 8, wherein in step (5), the boundary wood on the travel route is marked by moving the mobile measuring terminal to the middle of the breast diameter of the sample wood, and determining whether the boundary wood is in the forest sample plot.
10. The forest plot boundary measuring method as claimed in claim 9, wherein the mobile measuring terminal further comprises a microprocessor and a storage module, the microprocessor stores the acquired wireless ranging signals, the azimuth angle and the inclination angle parameters of the electronic compass module through the storage module, the mobile measuring terminal is in communication connection with the mobile computing terminal through a data interface or a first wireless communication module, and the mobile computing terminal is used for acquiring the data of the storage module and performing the data calculation in the step (5).
11. The forest plot boundary measuring method as claimed in claim 10, wherein the mobile computing terminal is equipped with a plot measuring system for completing connection activation of the mobile measuring terminal and the electronic spud, plot boundary setting, measurement and inspection, and plot position measurement.
12. The concentric circle forest land survey measuring method according to claim 11, wherein the land survey system comprises:
the mobile measuring terminal is connected with the module: the mobile measuring terminal is used for acquiring the measurement parameters acquired by the mobile measuring terminal in real time by connecting the mobile computing terminal with the mobile measuring terminal through a wireless or wired way;
electronic spud scanning activation module: the wireless positioning pile module is used for finding surrounding electronic positioning piles through wireless scanning by the mobile computing terminal, sending a specific signal or keyword after connection, and awakening the whole circuit of the wireless positioning pile module;
measurement pattern setting module: the system is used for setting coordinates of a sample plot corner point, a sample plot type and sample plot length and width;
a plot boundary measurement module: measuring corners and sample plot types determined during sample plot setting, acquiring measurement parameters of a mobile measurement terminal in real time, and calculating to complete sample plot boundary measurement, sample plot boundary wood judgment and sample plot corner positioning according to a forest sample plot boundary measurement method;
a plot boundary precision inspection module: calculating sample plot measurement accuracy by combining the calculated closing difference of the forest sample plots and the sample plot types set by the measurement sample plots;
a plot boundary measurement module: the measurement parameters of the mobile measurement terminal are obtained in real time, and the azimuth angles, the inclination angles, the slant distances and the horizontal distances of all the samples in the sample plot are calculated and finished according to the forest sample plot position measurement method.
13. A method for measuring the position of a sample wood is characterized in thatP 1 As a starting point, the mobile measurement terminal travels along a preset route, and sequentially measures all sample trees in the forest sample plot boundary measured by the forest sample plot boundary measurement method of any one of claims 2 to 12 one by one, wherein the mobile measurement terminal is provided with an electronic compass module, and the method comprises the following steps:
(1) When the electronic positioning pile reaches a sample wood to be measured, horizontally placing a rotating part of the mobile measuring terminal, ensuring that a first wireless ranging module and a second wireless ranging module at two ends of the rotating part are at the same level, and recording the slant distance from the electronic positioning pile to the center of the rotating part in real time;
(2) Horizontally moving the mobile measuring terminal along the breast-height diameter of the sample wood to enable the distance between the third wireless distance measuring module and the first wireless distance measuring module to be equal to that between the third wireless distance measuring module and the second wireless distance measuring module, wherein the slant distance from the electronic positioning pile to the center of the rotating part is the slant distance of the sample wood, and the angle of the electronic compass module is read as the azimuth angle of the sample wood;
(3) Keeping the position of the mobile measuring terminal still, enabling the rotating part to rotate to be vertically arranged, ensuring that the first wireless ranging module and the second wireless ranging module at the two ends of the rotating part are in the vertical direction, measuring the distance between the third wireless ranging module and the first wireless ranging module and the distance between the third wireless ranging module and the second wireless ranging module again, and calculating the horizontal distance and the inclination angle between the mobile measuring terminal and the electronic positioning pile after the mobile measuring terminal projects to the horizontal plane by the mobile calculating terminal;
(4) And marking the measured sample wood, and sequentially finishing the measurement of all sample wood in the sample plot.
14. The method for measuring the position of the sample wood according to claim 13, wherein in the step (3), the horizontal distance between the electronic spud and the mobile measuring terminal after the mobile measuring terminal is projected to the horizontal plane is the horizontal distance between the electronic spud and the sample wood, and assuming that the center of the rotating part is D, the calculation formula of the horizontal distance and the inclination angle between the electronic spud and the mobile measuring terminal after the mobile measuring terminal is projected to the horizontal plane is as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235342.0A CN115979228B (en) | 2023-03-13 | 2023-03-13 | Forest sample plot boundary and sample wood position measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310235342.0A CN115979228B (en) | 2023-03-13 | 2023-03-13 | Forest sample plot boundary and sample wood position measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115979228A true CN115979228A (en) | 2023-04-18 |
| CN115979228B CN115979228B (en) | 2024-01-16 |
Family
ID=85963354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310235342.0A Active CN115979228B (en) | 2023-03-13 | 2023-03-13 | Forest sample plot boundary and sample wood position measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115979228B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621523A (en) * | 2012-04-09 | 2012-08-01 | 北京林业大学 | Method and system for calibrating borderless sample plot |
| CN104535024A (en) * | 2014-10-23 | 2015-04-22 | 北京林业大学 | Forest calculating and measuring method for observing sample plot composed of five trees |
| CN104613940A (en) * | 2015-02-05 | 2015-05-13 | 北京林业大学 | Scheme for photographing and measuring forest permanent sample plot |
| CN108106590A (en) * | 2017-12-18 | 2018-06-01 | 谭焕鹏 | A kind of method of sample trees angle and distance in a kind of examination using the datum mark measuring and calculating forest reserves |
| CN113654536A (en) * | 2021-08-27 | 2021-11-16 | 广东省林业调查规划院 | Beidou RTK-based national forest and grass monitoring method, device, equipment and medium |
-
2023
- 2023-03-13 CN CN202310235342.0A patent/CN115979228B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621523A (en) * | 2012-04-09 | 2012-08-01 | 北京林业大学 | Method and system for calibrating borderless sample plot |
| CN104535024A (en) * | 2014-10-23 | 2015-04-22 | 北京林业大学 | Forest calculating and measuring method for observing sample plot composed of five trees |
| CN104613940A (en) * | 2015-02-05 | 2015-05-13 | 北京林业大学 | Scheme for photographing and measuring forest permanent sample plot |
| CN108106590A (en) * | 2017-12-18 | 2018-06-01 | 谭焕鹏 | A kind of method of sample trees angle and distance in a kind of examination using the datum mark measuring and calculating forest reserves |
| CN113654536A (en) * | 2021-08-27 | 2021-11-16 | 广东省林业调查规划院 | Beidou RTK-based national forest and grass monitoring method, device, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115979228B (en) | 2024-01-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103363988B (en) | A kind of method utilizing intelligent mobile phone sensor to realize the navigation of earth magnetism indoor positioning | |
| CN108051835B (en) | Inclination measuring device based on double antennas and measuring and lofting method | |
| CN105072682B (en) | A kind of GNSS and WIFI combined positioning methods and system | |
| CN104796866A (en) | Indoor positioning method and device | |
| CN103813448A (en) | Indoor positioning method based on RSSI | |
| CN104540219A (en) | Wi-Fi fingerprint indoor positioning method low in complexity | |
| CN105652303B (en) | A kind of mountain area field sampling based on mobile electronic devices such as Pad does not contact localization method quickly | |
| CN107655474A (en) | A kind of air navigation aid and navigation system based on intelligent terminal | |
| CN109839613B (en) | Radio frequency positioning method and device using path information calibration | |
| CN104897059B (en) | A kind of irregular stacking body volume measuring method of pocket | |
| CN101801084A (en) | Method and device for positioning and tracking equipment in wireless local land area | |
| CN107607108A (en) | A kind of location equipment of indoor moving target | |
| CN109613567B (en) | Substation grounding grid test electrode positioning instrument based on global satellite navigation system | |
| CN105806304B (en) | Antenna direction angle measuring method and device | |
| CN207423053U (en) | Engineering survey ruler | |
| CN206177304U (en) | Top total powerstation | |
| CN203191541U (en) | Novel portable electronic tracking and positioning system | |
| CN111060870B (en) | RFID positioning method based on antenna rotation | |
| CN115979228B (en) | Forest sample plot boundary and sample wood position measurement method | |
| CN111426304A (en) | Accurate attitude positioning method based on vision, satellite positioning and GIS algorithm | |
| CN115950407B (en) | Concentric circle forest sample plot investigation and measurement method | |
| CN104994580A (en) | Indoor positioning method | |
| CN109413577A (en) | A kind of indoor orientation method based on point-to-point auxiliary | |
| CN104833995A (en) | Passive area geographic information acquiring system based on Android platform and method thereof | |
| CN208588826U (en) | A kind of grounding net of transformer substation test electrode position indicator based on Global Satellite Navigation System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |