CN210323366U - Ground laser scanning reflector plate for under-forest investigation - Google Patents
Ground laser scanning reflector plate for under-forest investigation Download PDFInfo
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- CN210323366U CN210323366U CN201920494816.2U CN201920494816U CN210323366U CN 210323366 U CN210323366 U CN 210323366U CN 201920494816 U CN201920494816 U CN 201920494816U CN 210323366 U CN210323366 U CN 210323366U
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- 238000011835 investigation Methods 0.000 title claims abstract description 17
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 9
- 238000009434 installation Methods 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a ground laser scanning reflector plate for investigation under forest relates to forest land investigation technical field, particularly, relates to a reflector plate and fixed subassembly. The reflector plate device is used for three-dimensional laser scanning to carry out under-forest investigation and comprises a reflector plate fixing assembly and a plurality of reflector plates. The reflector plate fixing assembly comprises a tension spring and a nut sleeve. The reflector plate is square, the front side of the reflector plate comprises a reflective film, black target wires and positioning numbers, the back side of the reflector plate is a plastic flitch, a fixed opening is formed in the opposite vertex angle, and the reflector plate and the fixed assembly are connected through the opening. The embodiment of the utility model provides a reflector plate and fixed subassembly thereof, from multidirectional distribution and fixed reflector plate through fixed subassembly, the reflector plate is equipped with the serial number simultaneously for multistation three-dimensional laser scanner can acquire multi-direction mark target point and help improving multistation point cloud data concatenation efficiency under the forest during operation, and the serial number of settlement is in the scanning of being convenient for forest stand list wood discernment and location, helps three-dimensional laser scanner to be applied to forest stand list wood growth monitoring.
Description
Technical Field
The utility model relates to a forestry investigation technical field, a ground laser scanning reflector plate for investigation under the forest specifically says so.
Background
The laser radar is a novel remote sensing technology, is not limited by sunlight to realize earth observation, adopts a non-contact active measurement scanning mode for any object, quickly and directly acquires high-precision three-dimensional data, and displays and processes information of the real world on a computer in a three-dimensional manner, so that the laser radar is known as 'the revolution of the secondary surveying and mapping technology after the GPS technology'.
The three-dimensional scanner can acquire tens of thousands of data points in multiple time to form three-dimensional data information, and the massive data is vividly called 'point cloud'. During forest stand scanning, due to shielding among multiple standing trees, the scanning range of one measuring station is easily limited by scanning distance and view field angle, generally, an object cannot be completely recorded, and at the moment, multiple measured scanned point cloud data need to be spliced to form a complete model. Meanwhile, single-tree positioning and numbering are set in the forest stand, and the method has important significance for matching single-tree point cloud data with actually measured data. In order to better perform multi-station point cloud stitching, target points or characteristic points need to be distributed in the scanning process. The target point is a control point for point cloud splicing processing in the three-dimensional laser scanning technology, and the precision of the target point directly influences the extraction precision of the standing tree point cloud. Meanwhile, the correspondence of the single-tree point cloud data to the on-site survey single-tree data is finished, and the single-tree is required to be labeled and marked.
At present, the types of positioning and numbering used in the three-dimensional laser scanning technology mainly comprise paper checkerboards, circular reflector plates and the like. In the multi-station laser scanning of forest stands, target points provided from one direction only by means of paper checkerboards are easily shielded by adjacent trees and cannot be identified, and the problem that the target points cannot be reused exists. Firstly, forest stand multi-station laser radar scanning is different from building multi-station laser scanning, the degree of distinguishing characteristic points in forest stands is small, and high point cloud splicing precision and splicing efficiency can be achieved only by adding target points. Secondly, the single trees in the forest stand are various in shape, the single trees in the point cloud data are numbered and positioned, and the single trees are matched with the on-site debugging single tree data, so that the method has important significance for monitoring the growth of the single trees.
In addition, the target is usually adhered to the trunk through an adhesive tape in the installation of the reflector plate in the prior art, so that the adhering process is complicated, the used target paper and the adhesive tape cannot be reused, the environment is easily polluted, and the target is easily influenced by, for example, a wet environment and wind power and is not favorable for fixing the target.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: aiming at the defects of the prior art, the ground laser scanning reflection sheet for the under forest investigation is provided; all positioning numbers and target points can be identified in the laser scanning process.
The technical scheme is as follows: in order to realize the purpose of the utility model, the utility model discloses a technical scheme as follows: a ground laser scanning reflector plate for forest investigation comprises a reflector plate body, wherein a reflective film is arranged on the front surface of the reflector plate body, and a plastic pasting plate is arranged on the back surface of the reflector plate body; black target wires and positioning numbers are also arranged on the reflective film on the front side; the reflecting sheet body is also provided with openings at two opposite vertex angles, the openings penetrate through the reflecting film on the front side and the plastic flitch on the back side, and a fixing component is also arranged in the openings; and the positioning numbers are arranged at the other two opposite corners of the reflective film opposite to the opening.
Preferably, the fixing component comprises a screw, a nut matched with the screw for use and a tension spring; the screw is arranged in the open hole, the nut end of the screw is arranged on the front side, the screw rod is arranged on the back side, the two ends of the tension spring are both provided with hooks, and one end of the tension spring is sleeved into the screw rod and is pressed and fixed through the nut; and the hook at the other end of the tension spring can be correspondingly arranged on the screw rod of the screw at the other end or the screw rod of the other reflector plate body.
Preferably, the black target wire is arranged into a cross wire and two concentric circle structures which are arranged by taking the central point of the cross wire as the center of a circle.
Preferably, the reflector body can be a round, square or rectangular reflector.
Preferably, the reflector body is a square reflector with the size of 8cm multiplied by 8 cm; and the diameter of the opening is set to be 4mm, and the distance between the circle center of the opening and two right-angle sides of the opposite vertex angle is set to be 12 mm.
Preferably, the positioning numbers are arranged in square boxes with the right-angle side of 20 mm.
Preferably, the reflective film on the front surface of the reflector body is a silver national standard first-grade PVC reflective film.
Has the advantages that: compared with the prior art, the utility model, have following advantage: a cross target wire and two concentric circle target wires with the center point of the cross target wire as the center of a circle are arranged on a reflective film of a reflector plate body in the device, and positioning numbers are arranged at opposite vertex angles of the reflector plate; the reflector plates can be correspondingly combined by matching with the fixing devices on the reflector plates, so that all positioning numbers and target points can be identified in the multi-station laser scanning process, and the laser scanning efficiency and quality are improved; in addition, the fixing assembly of the device is installed in a matched mode through the nuts and the tension springs, the multiple groups of reflectors can be installed in a combined mode, the tension springs can be designed and fixed on trunks with different outer diameters, the fixing and installing are very convenient, the installation influence on the reflectors caused by the external environment is effectively reduced, and the device is beneficial to recycling and cannot cause environmental pollution.
Drawings
FIG. 1 is a perspective view of the present invention;
fig. 2 is a side view of the present invention;
fig. 3 is a front view of the present invention.
Detailed Description
The present invention will be further clarified by the following embodiments with reference to the attached drawings, which are implemented on the premise of the technical solution of the present invention, and it should be understood that these embodiments are only used for illustrating the present invention and are not used for limiting the scope of the present invention.
As shown in fig. 1, a laser scanning reflective sheet for ground surface used in forest investigation includes a reflective sheet body 1, the reflective sheet body 1 can be configured to be a circular, square or rectangular structure, and the solution in this embodiment is configured to be a square reflective sheet of 8cm × 8 cm.
The front surface of the reflector body 1 is provided with a reflective film 2, and the reflective film 2 adopts a silver national standard first-level reflective film and adopts a PVC material, so that the reflector has extremely high stability and weather resistance; and the back of the reflector plate body 1 is provided with a plastic flitch plate 3.
As shown in fig. 3, the front reflective film 2 is further provided with black target wires 4 and positioning numbers 5; this black mark target silk 4 sets up to the cross and uses the central point of this cross to be two concentric circles structures that the centre of a circle set up, makes the three-dimensional laser scanner of multistation can acquire multi-direction target point and help improving multistation point cloud data concatenation efficiency at the under-forest during operation through the mark target silk that sets up above-mentioned shape, and the serial number of setting is convenient for scan forest stand list wood discernment and location help three-dimensional laser scanner to be applied to forest stand list wood growth monitoring.
The positioning numbers 5 are arranged at the other two opposite vertex angles of the reflective film 2 opposite to the opening holes 6; and is arranged in a square frame with the side length of a right angle of 20 mm; the positioning number 5 on the reflective film 2 can be freely changed according to the needs of experiments, and the positioning number 5 on the reflector body 1 can be displayed in later-stage point cloud data to be beneficial to single-tree positioning of forest stands.
The reflector body 1 is also provided with 4mm openings 6 at two opposite vertex angles, the openings 6 penetrate through the reflective film 2 on the front surface and the plastic flitch 3 on the back surface, and the arrangement position of the openings 6 is that the distance between the circle center of the openings and two right-angle sides of the opposite vertex angles is 12 mm; and a fixing assembly is also installed in the opening 6.
As shown in fig. 2, the fixing component includes a screw 7, a nut 8 used in cooperation with the screw 7, and a tension spring 9; the screw 7 is arranged in the opening 6, the nut end of the screw 7 is arranged on the front side, the screw rod is arranged on the back side, the two ends of the tension spring 9 are both provided with hooks 10, and one end of each hook is sleeved into the screw rod and is pressed and fixed through a nut 8; and the hook 10 at the other end of the tension spring 9 can be correspondingly arranged on the screw rod of the screw 7 at the other end or on the screw rod of the other reflector body 1.
The screw 7, the nut 8 and the extension spring 9 are all made of stainless steel materials, the hooks 10 at the two ends of the extension spring 9 are arranged to be closed hooks, the reflector plate can be installed on the trunks with different outer diameters through the stretching performance of the extension spring 9, different angles can be adjusted, the reflector plate is fixed at different positions, multi-directional target points are provided on the trunks, the positions are firm, the dismounting is convenient, the environment influence is avoided, and the environment is not damaged or polluted.
Through the stretching function of the tension spring 9 and the hooks arranged on the two sides, a plurality of reflectors can be connected and assembled, different combinations can be carried out according to different requirements, and the reflectors are fixed in different directions, so that all positioning numbers and target points can be identified in the multi-station laser scanning process. And through the extension spring installation fixed, can reuse, it is more convenient than the fixed mode that utilizes glue and target paper in the tradition.
In conclusion, through the multiple groups of target marking wires, the positioning codes and the set fixing components of the device, all positioning numbers and target marking points can be identified in the laser scanning process, and the multiple groups of reflectors can be effectively connected and conveniently detached.
The detailed description is to be construed as exemplary only and is not intended to limit the scope of the invention, which is defined by the appended claims, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (7)
1. A ground laser scanning reflector plate for forest investigation is characterized by comprising a reflector plate body (1), wherein a reflective film (2) is arranged on the front surface of the reflector plate body (1), and a plastic pasting plate (3) is arranged on the back surface of the reflector plate body; the front reflection film (2) is also provided with a black target wire (4) and a positioning number (5); the reflecting sheet comprises a reflecting sheet body (1), wherein the reflecting sheet body is provided with openings (6) at two opposite vertex angles, the openings (6) penetrate through a reflecting film (2) on the front surface and a plastic flitch (3) on the back surface, and a fixing component is further installed in the openings (6); and the positioning numbers (5) are arranged at the other two opposite vertex angles of the reflective film (2) opposite to the open hole (6).
2. The ground laser scanning reflection sheet for forest investigation according to claim 1, wherein: the fixing component comprises a screw (7), a nut (8) matched with the screw (7) for use and a tension spring (9); the screw (7) is arranged in the opening (6), the nut end of the screw (7) is arranged on the front side, the screw rod is arranged on the back side, the two ends of the tension spring (9) are both provided with a hook (10), and one end of the tension spring is sleeved into the screw rod and is pressed and fixed through a nut (8); and the hook (10) at the other end of the tension spring (9) can be correspondingly arranged on the screw rod of the screw (7) at the other end or the screw rod of the other reflector body (1).
3. The ground laser scanning reflection sheet for forest investigation according to claim 1, wherein: the black target wire (4) is arranged into a cross wire and two concentric circle structures which are arranged by taking the central point of the cross wire as the center of a circle.
4. The ground laser scanning reflection sheet for forest investigation according to claim 2, wherein: the reflector plate body (1) can be a round, square or rectangular reflector plate.
5. The ground laser scanning reflection sheet for forest investigation according to claim 4, wherein: the reflector body (1) is a square reflector with the size of 8cm multiplied by 8 cm; and the diameter of the opening hole (6) is set to be 4mm, and the distance between the circle center of the opening hole (6) and two right-angle sides of the opposite vertex angle is set to be 12 mm.
6. The ground laser scanning reflection sheet for forest investigation according to claim 5, wherein: the positioning numbers (5) are arranged in a square frame with the length of a right-angle side being 20 mm.
7. The ground laser scanning reflection sheet for forest investigation according to claim 1, wherein: the reflective film (2) on the front surface of the reflector body (1) is made of silver national standard first-grade PVC material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494816.2U CN210323366U (en) | 2019-04-12 | 2019-04-12 | Ground laser scanning reflector plate for under-forest investigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494816.2U CN210323366U (en) | 2019-04-12 | 2019-04-12 | Ground laser scanning reflector plate for under-forest investigation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210323366U true CN210323366U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920494816.2U Expired - Fee Related CN210323366U (en) | 2019-04-12 | 2019-04-12 | Ground laser scanning reflector plate for under-forest investigation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880556A (en) * | 2021-01-06 | 2021-06-01 | 南京林业大学 | Method for generating accurate codes of forest stand survey sample trees through three-dimensional laser scanning of foundation |
-
2019
- 2019-04-12 CN CN201920494816.2U patent/CN210323366U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880556A (en) * | 2021-01-06 | 2021-06-01 | 南京林业大学 | Method for generating accurate codes of forest stand survey sample trees through three-dimensional laser scanning of foundation |
| CN112880556B (en) * | 2021-01-06 | 2022-04-22 | 南京林业大学 | Method for determining forest stand standard ground sample wood position through three-dimensional laser scanning of foundation |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |