CN107870333A - A kind of method of ground laser radar simulation angle gauge measure mean height - Google Patents
A kind of method of ground laser radar simulation angle gauge measure mean height Download PDFInfo
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- CN107870333A CN107870333A CN201711025571.0A CN201711025571A CN107870333A CN 107870333 A CN107870333 A CN 107870333A CN 201711025571 A CN201711025571 A CN 201711025571A CN 107870333 A CN107870333 A CN 107870333A
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- angle gauge
- mean height
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- laser radar
- height
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
Abstract
The invention discloses a kind of method of ground laser radar simulation angle gauge measure mean height.The invention is to obtain standing forest cloud data by instrument of three-dimensional laser scanner, identify individual plant trees data and terrain data, by the angular dimension relation for judging the angle gauge requirement vertical with setting simulation of trees peak and the angle that three-dimensional laser scanner observation station is formed, determines counting wood strain number, the mean height is then calculated according to the vertical angle gauge measure mean height method of flat field kind man.
Description
First, technical field
The present invention relates to a kind of method for measuring forest, is based particularly on ground laser radar simulation angle gauge measure standing forest and is averaged
High method.
2nd, technical background
Up to the present, the standing forest height of tree is mainly combined with altitude meter, laser ceilometer, ultrasonic range finder either compass
The measuring instruments such as mark post measure.Altitude meter is then the height measurement instrument generally used in forestry, but its elevation angle is limited,
The distance that the height of measurement one tree must be fallen back on apart from the Dingyuan of tree one can.It can also be measured using compass combination mark post
The height of tree, but require that the gradient is not too big.And common laser altitude meter is also required to the artificial target point aimed at the height of tree, for closing
Bigger standing forest is spent, error is very big.Therefore, the height of tree is determined using traditional altitude meter device during forest inventory investigation,
Particularly mean height inevitably brings many troubles and error.
At present still without the instrument and equipment of the higher measurement mean height of precision, conventional angle gauge standing forest in terms of forestry
The measuring method of mean height, because fixed error of angle gauge itself is larger, and artificial observation error, cause resultant error also very
Greatly, the inventive method utilizes small-sized portable type ground laser radar, and its simple use, precision is high, conveniently operates, by letter
The various effectively processing for the data that single field operation obtains, reach simplified field operation measurement, the system model of intelligent office work management.The instrument
Device can realize that field operation processing function is in one in angle gauge measurement, the General Promotion speed of interior field operation data processing, intelligent
Degree, and the precision of data acquisition.
3rd, the content of the invention
To overcome conventional method data acquisition cycle to grow, efficiency is low, the shortcomings that low precision, improves efficiency and precision, shortens
In the cycle, accurately measuring for mean height is realized, the present invention provides a kind of standing forest of the simulation angle gauge based on ground laser radar
Mean height assay method
In standing forest, observation station is chosen, sets up ground laser radar, and centering leveling is carried out to it, measures Instrument observation
Highly, the observation station is surveyed, the point that will be got as the angle gauge point O for simulating vertical angle gauge to 360 ° of horizontal winding of standing forest progress
Cloud data are imported in data processing software, artificial to extract individual plant tree point cloud and topographic(al) point cloud, wherein any point point cloud coordinate
For Pi (xi, yi, zi), it is Pzmax to extract the maximum point of individual plant trees Zi values respectively, calculates Pzmax and Instrument observation point O's
Vertical angle β, if β ＞ βRegulation, count 1, β=βRegulation, count 0.5, β ＜ βRegulation, 0 is counted, by all countings and Zi is designated as, leads to simultaneously
Cross the conventional horizontal angle gauge methods of sampling and calculate standing forest per hectare strain number, be designated as N, calculated according to the vertical angle gauge of flat field kind man public
Formula, if forest land area T=1 hectares, per hectare strain number is N, and the counting wood strain number that sight is cut with trunk phase is Zh, that is, expand circle and exist
Degree of covering on forest land is Zh, then expanding area of a circle summation is：
It is thus more than eye height average a height of：
Level land mean height is：
Hillside fields mean height is：
If n angle gauge point is set in standing forest：
If β takes arbitrary value,：
This invention has advantages below compared with the conventional method：
(1) precision of related forest data is substantially increased, because this research employs high-precision instrument of surveying and mapping --- ground
Face laser radar has the raising of the order of magnitude as metadata acquisition tool, more traditional tree survey method precision, and the data being achieved in that are made
For the data source of standing forest management volume, mean height, the precision of these data is necessarily greatly improved；
(2) operating efficiency of forest resource monitoring is significantly improved, in traditional forest inventory investigation, survey data needs pen
Note, and coordinate calculator to be calculated, this has researched and developed assize software, it is possible to achieve the real-time collection of standing forest Monitoring Data,
Processing and preservation, complete whole monitoring process, substantially increase the automaticity of field work；
(3) noninvasive measurement to trees is realized, conventional method is generally all taken bottom class's normal wood and does analytic tree
Approach, intricate operation, and forest is damaged.Trees are measured by ground laser radar, without cuting down forest and climbing tree, no
Have that any infringement can is automatic, obtains factors of enumeration in real time to forest.This for current China it is honest push capable forest can
Going concern policy is particularly important.
4th, illustrate
Fig. 1 is tree height measurement principle schematic, and Fig. 2 is mean height measuring principle schematic diagram, and Fig. 3 is angle gauge open-mouth ruler
Very little schematic diagram.
5th, embodiment：
It is different from existing method based on ground laser radar mean height measuring method, it is characterized in particular in：
1 in standing forest, chooses observation station, sets up ground laser radar, and carries out centering leveling to it, measures Instrument observation
Highly, angle gauge point O of the observation station as the vertical angle gauge of simulation,
2 horizontal windings for being carried out 360 ° to standing forest using ground laser radar at angle gauge point are surveyed, the point cloud number that will be got
According to importing in data processing software, individual plant tree point cloud and topographic(al) point cloud are manually extracted,
3 set wherein any point point cloud coordinate as Pi (xi, yi, zi), extract the maximum point of individual plant trees Zi values respectively and are
Pzmax, Pzmax and Instrument observation point O vertical angle β is calculated, if β ＞ βRegulation, count 1, β=βRegulation, count 0.5, β ＜ βRegulation, meter
Number 0, by all countings and Zi is designated as,
4 calculate standing forest per hectare strain number by the conventional horizontal angle gauge methods of sampling, are designated as N,
5 according to the vertical angle gauge calculation formula of flat field kind man, if forest land area T=1 hectares, per hectare strain number be N, sight and
The counting wood strain number that trunk phase is cut is Zh, that is, it is Z to expand degree of covering of the circle on forest landh, then expanding area of a circle summation is：
It is thus more than eye height average a height of：
Level land mean height is：
Hillside fields mean height is：
If n angle gauge point is set in standing forest：
If β takes arbitrary value,：。
Claims (2)
1. a kind of method that ground laser radar simulates vertical angle gauge measure mean height, it is characterized in that：With ground laser thunder
Standing forest cloud data is obtained up to for instrument, individual plant trees data and terrain data are identified, by judging trees peak and ground
The angular dimension relation of the angle that Laser Radar Observation point is formed angle gauge requirement vertical with setting simulation, determines counting wood strain
Number, the mean height is then calculated according to the vertical angle gauge measure mean height method of flat field kind man.
2. the method for simulating vertical angle gauge measure mean height based on a kind of ground laser radar scanning described in right 1, it is special
Sign is：In standing forest, observation station is chosen, sets up ground laser radar, and centering leveling is carried out to it, measures Instrument observation height
Degree, the observation station are surveyed, the point cloud that will be got as the angle gauge point O for simulating vertical angle gauge to 360 ° of horizontal winding of standing forest progress
Data are imported in data processing software, and artificial extraction individual plant tree point cloud and topographic(al) point cloud, wherein any point point cloud coordinate are
Pi (Xi, Yi, Zi), it is Pmax to extract the maximum point of individual plant trees Zi values respectively, calculates Pmax and Instrument observation point O vertical angle
β, by comparing β and βRegulationMagnitude relationship count wood strain number, while pass through the conventional horizontal angle gauge methods of sampling and calculate
Standing forest per hectare strain number, is designated as N, according to the vertical angle gauge calculation formula of flat field kind man, if forest land area T=1 hectares, per hectare strain
Number is N, and the counting wood strain number that sight is cut with trunk phase is Zh, that is, it is Z to expand degree of covering of the circle on forest landh, then disc is expanded
Accumulating summation is：
It is thus more than eye height average a height of：
Level land mean height is：
Hillside fields mean height is：
If n angle gauge point is set in standing forest：
If β takes arbitrary value,：
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117129947A (en) * | 2023-10-26 | 2023-11-28 | 成都金支点科技有限公司 | Planar transformation method radar signal identification method based on mininet |
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| CN117129947A (en) * | 2023-10-26 | 2023-11-28 | 成都金支点科技有限公司 | Planar transformation method radar signal identification method based on mininet |
| CN117129947B (en) * | 2023-10-26 | 2023-12-26 | 成都金支点科技有限公司 | Planar transformation method radar signal identification method based on mininet |
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