CN113447005A - Portable field area dividing auxiliary device and dividing method thereof - Google Patents
Portable field area dividing auxiliary device and dividing method thereof Download PDFInfo
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- CN113447005A CN113447005A CN202110732203.XA CN202110732203A CN113447005A CN 113447005 A CN113447005 A CN 113447005A CN 202110732203 A CN202110732203 A CN 202110732203A CN 113447005 A CN113447005 A CN 113447005A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 13
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 206010070834 Sensitisation Diseases 0.000 description 7
- 230000008313 sensitization Effects 0.000 description 7
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000607479 Yersinia pestis Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 230000005571 horizontal transmission Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a portable field area demarcation assistor and a demarcation method thereof, relating to the technical field of test field area demarcation equipment and comprising a fixed part and a rotating part, wherein one end of the fixed part is used for being inserted into soil, the other end of the fixed part is rotationally connected with the rotating part, and the connecting ends of the fixed part and the rotating part which are mutually connected are respectively provided with a scale mark and a pointer for measuring the rotating angle of the rotating part; a laser emitter for emitting light rays along the horizontal radial direction is fixed on the rotating part; according to the invention, visible laser light emitted by the laser emitter is used as the boundary of the demarcated area, and the technical problems of time and labor waste and easiness in deviation caused by manual pull ropes can be avoided by utilizing the characteristics that the laser light path is straighter and does not generate angle deviation; meanwhile, the rotating part and the fixing part with pointers and scale marks are arranged, so that the angle between laser rays emitted by the laser emitters on the adjacent auxiliary devices can be accurately grasped, and the method is simpler.
Description
Technical Field
The invention relates to the technical field of test field area delimiting equipment, in particular to a portable field area delimiting auxiliary device and a delimiting method thereof.
Background
The test field is used as a farmland for agricultural technicians to perform items such as variety comparison, fertilizer comparison, season comparison, pest control comparison and the like. In traditional field test, often adopt many people to lead to the rope when drawing test field piece, go on with the mode that the tape measure was measured, waste time and energy, and artifical lead to the rope and easily appear the deviation, cause to draw a limit to appear the slope dislocation, two border angles can not reach the settlement requirement to not only having influenced and drawn a limit area, having caused experimental inaccurate, also lead to the district form irregular, influence experimental demonstration effect.
The utility model discloses a demarcation instrument that utility model patent publication is "201821209607.0", the title is "demarcation instrument of field test plot" can accurate quick definite test plot's right angle, carry out quick adjustment according to topography and experimental demand (plot area), mark off the test plot, experimental condition can repeat, do benefit to the establishment of field test district, but this demarcation instrument need draw the line repeatedly in the use, and measure the length of line segment, the position of record point, determine into two lines of right angle, lead to it though can guarantee the right angled accuracy, nevertheless the demarcation mode is very loaded down with trivial details. The utility model discloses a utility model patent of application number "201821608472.5", the name is "a simple and easy field rectangular measuring apparatu", when need to demarcate the line that is mutually perpendicular with the ridge in the field, with square bottom of the pipe fixed in the field, the fixed point is 2 ~ 4cm with perpendicular line, the distance of ridge, vertical line, through adjusting the longitudinal arm of second right angle sign indicating number, make the hanging wire hammer on the horizontal arm of second right angle sign indicating number be located the ridge central line directly over, at this moment make the mark on the ground directly below the hanging wire hammer of longitudinal arm, the line of connecting between the mark is the vertical line; in the actual use process, although the vertical line with the ground ridge can be quickly obtained, the manual rope pulling is still needed in the actual area line dividing process, so that the time and labor are still wasted, and the boundary included angle is easy to deviate.
Therefore, how to quickly and accurately determine the boundary of the field demarcating area, improve the demarcating efficiency and reduce the labor intensity is an urgent technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a portable field area dividing auxiliary device and a dividing method thereof, which are used for solving the problems in the prior art, can obviously improve the field area dividing efficiency and accuracy and reduce the labor intensity of personnel.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a portable field area demarcation assistor, which comprises a fixed part and a rotating part, wherein one end of the fixed part is inserted into soil, the other end of the fixed part is rotatably connected with the rotating part, and the connecting ends of the fixed part and the rotating part which are mutually connected are respectively provided with a scale mark and a pointer for measuring the rotating angle of the rotating part; and a laser emitter for emitting light rays along the horizontal radial direction is fixed on the rotating part.
Preferably, the rotating part is further provided with a laser receiver for receiving horizontal laser, and the transmitting hole of the laser transmitter and the light sensing hole of the laser receiver are arranged at the same height.
Preferably, be provided with the display screen on the rotation portion lateral wall, inside is provided with the laser rangefinder module, the laser rangefinder module the display screen the laser receiver all carries out the electricity and connects, the display screen can show laser emission distance.
Preferably, a power supply for supplying power to the electric element on the rotating part is further provided in the fixed part.
Preferably, the top of the rotating part is further connected with a top cover for sealing the rotating part through threads.
Preferably, a level bubble for detecting whether the fixing portion is vertical is arranged on the top surface of the top cover.
Preferably, the fixed part and the rotating part are both provided with gradienters.
Preferably, the end of the fixing portion for inserting into soil is tapered.
The invention also provides a portable field area defining method, which comprises the following steps:
1) inserting a fixing part into soil at a set position, ensuring the fixing part to be vertical through a level gauge and a leveling bubble, taking the auxiliary device as a vertex of a defined area, and taking the direction opposite to the laser emitter as the extending direction of one side of the defined area;
2) rotating the rotating part by a set angle, turning on a power switch, enabling the laser transmitter to emit laser, inserting an auxiliary device along the laser direction, enabling a photosensitive hole of the laser receiver to be aligned with the laser for receiving, displaying the distance between the two auxiliary devices on a display screen, and adjusting the position of the latter auxiliary device according to the required distance to obtain the other vertex of the defined area;
3) repeating the step 2), and inserting a plurality of auxiliary devices to obtain all vertexes of the defined area;
4) and planting crops in the defined area.
Preferably, an auxiliary device is arranged between the two auxiliary devices in the defined area, the distance between the auxiliary device and the end part auxiliary device is adjusted to a set distance, then the rotating part on the auxiliary device is rotated by a set angle, a power switch is turned on, a laser emitter emits laser, and a ridge is made or crops are planted along a laser light path.
Compared with the prior art, the invention has the following technical effects:
1. according to the invention, visible laser light emitted by the laser emitter is used as the boundary of the demarcated area, and the characteristics that the laser light path is straighter and the angle deviation cannot occur are utilized, so that the technical problems of time and labor waste and easy deviation caused by manual rope pulling can be solved; meanwhile, the rotating part and the fixing part with pointers and scale marks are arranged, so that the angle between laser rays emitted by the laser emitters on the adjacent assistors can be accurately mastered, namely the angle of two adjacent boundaries of a defined area, and the method is simpler; therefore, the method can obviously improve the efficiency and the accuracy of field area demarcation and reduce the labor intensity of personnel;
2. according to the invention, the display screen is arranged on the side wall of the rotating part, the laser ranging module is arranged in the rotating part, the laser ranging module, the display screen and the laser receiver are all electrically connected, and the display screen can display the laser emission distance, so that the distance value between the two auxiliary devices can be obtained more visually and conveniently, the process of manually measuring the distance between the two auxiliary devices by using a tape measure is omitted, the labor intensity of personnel is further reduced, and the scribing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of the structure of the auxiliary device;
FIG. 2 is an exploded view of the structure of the assist device;
FIG. 3 is a plan view of the rotating part;
wherein, 1, a fixed part; 2. a rotating part; 3. scale lines; 4. a pointer; 5. a laser transmitter; 6. a laser receiver; 7. an emission aperture; 8. a photosensitive hole; 9. a laser ranging module; 10. a display screen; 11. a top cover; 12. a level gauge; 13. a level bubble.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a portable field area dividing auxiliary device and a dividing method thereof, which are used for solving the problems in the prior art, can obviously improve the field area dividing efficiency and accuracy and reduce the labor intensity of personnel.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1:
as shown in fig. 1 to 3, the present embodiment provides a portable field area demarcation auxiliary device, which comprises a fixing portion 1 and a rotating portion 2, wherein one end of the fixing portion 1 is used for being inserted into soil, the other end of the fixing portion is rotatably connected with the rotating portion 2, and the connecting ends of the fixing portion 1 and the rotating portion 2, which are connected with each other, are respectively provided with a scale mark 3 and a pointer 4 for measuring the rotation angle of the rotating portion 2; a laser emitter 5 for emitting light in a horizontal radial direction is fixed to the rotating portion 2.
When the auxiliary device is used, the bottom end of a fixing part 1 of an auxiliary device (called as a first auxiliary device) is inserted into soil to be used as a vertex of a region to be demarcated, the fixing part 1 is adjusted to ensure that the region to be demarcated is vertical, meanwhile, a laser emitter 5 is enabled to be opposite to a boundary horizontal direction of the demarcated region to emit laser, the boundary direction can be judged according to ridges, then another auxiliary device (called as a second auxiliary device) is inserted into a laser light path, the distance between the first auxiliary device and the second auxiliary device is determined through a measuring device such as a tape measure, the distance is equal to the side length of the demarcated region, the second auxiliary device is ensured to be vertical, and at the moment, the second auxiliary device is a second vertex of the region to be demarcated; after the second assistor is inserted, laser irradiates on the rotating part 2 of the second assistor, if the laser irradiates on the transmitting hole 7 of the laser emitter 5, at the moment, the rotating part 2 of the second assistor is rotated to enable the laser emitter 5 to rotate through the boundary included angle of the area to be demarcated, which is usually 90 degrees, then the laser emitter 5 is opened to emit horizontal laser, the steps are repeated to obtain the positions of other assistors, and further other vertexes of the area to be demarcated are obtained.
Therefore, in the embodiment, the visible laser light emitted by the laser emitter 5 is used as the boundary of the demarcated area, and the characteristics that the laser light path is straighter and the angle deviation cannot occur are utilized, so that the technical problems that the area demarcating efficiency is low and the boundary angle is easy to deviate in the traditional mode of manually pulling the rope are solved; meanwhile, the rotating part 2 and the fixing part 1 with the pointers 4 and the scale marks 3 are arranged, so that the angle between laser rays emitted by the laser emitters 5 on the adjacent assistors can be accurately mastered, namely the angle of two adjacent boundaries of a defined area is defined, the angle adjusting process is simple and accurate, the method is suitable for defining boundary angles except for right angles, and the applicability is stronger; therefore, the embodiment can obviously improve the field demarcation efficiency and reduce the labor intensity of personnel.
It should be noted that, in the practical use process of the present embodiment, the laser of the first auxiliary device does not necessarily need to face the emitting hole 7 of the laser emitter 5 on the second auxiliary device, and may be at any circumferential position on the rotating part 2 of the second auxiliary device; for example, the first assistor is over against the point a on the second assistor rotating part 2, and the worker can mark the point a after the point a is over against, and record the angle value corresponding to the point a, so that the angle that the rotating part 2 needs to rotate can be calculated according to the currently corresponding angle value of the laser emitting hole 7 on the second assistor, and the laser emitting hole 7 on the second assistor is over against the other boundary direction of the area to be defined.
Further, the rotating part 2 of the present embodiment is further provided with a laser receiver 6 for receiving horizontal laser, and the setting height of the emitting hole 7 of the laser emitter 5 is the same as that of the light sensing hole 8 of the laser receiver 6; the laser receiver 6 is arranged, so that the alignment position of the photosensitive hole 8 and the emitting hole 7 can be more accurate; and the angle that corresponds between sensitization hole 8 and the transmitting hole 7 can set up by oneself, if the angle difference sets up to 90, when sensitization hole 8 can receive laser ray, can directly open laser emitter 5 and send laser, the laser of transmission then with the laser mutually perpendicular who receives for the demarcation process operation is more simple and convenient. Because the laser is horizontal transmission, when sensitization hole 8 received the laser, emission hole 7 and sensitization hole 8 are on same water flat line, if there is certain difference in height in the fixed position of the two on rotation portion 2, if sensitization hole 8 is higher than emission hole 7, then the degree of depth that subsequent assistor inserted and establish in soil can be more and more dark, in order to guarantee that sensitization hole 8 on the later assistor and emission hole 7 on the preceding assistor are on same water flat line, consequently, this embodiment is injectd emission hole 7 and sensitization hole 8 on same height, make the assistor insert the height after the soil the same, the staff of being convenient for carries out the implementation of demarcation regional process more.
Specifically, in the present embodiment, the fixed part 1 and the rotating part 2 may be of a cylindrical structure with the same diameter, but are not limited to the cylindrical structure, when the fixed part and the rotating part are of the cylindrical structure or other structures, the pointer 4 is disposed at the end of the rotating part 2, and the scale 3 is disposed at the end of the fixed part 1; meanwhile, the laser emitter 5 and the laser receiver 6 are both arranged inside the rotating part 2, and the emitting hole 7 and the photosensitive hole 8 are arranged on the side wall of the rotating part 2; it should be understood by those skilled in the art that no matter what shape the fixed part 1 and the rotating part 2 are, when the emitting hole 7 is aligned with the light-sensing hole 8, the centers of the emitting hole 7, the light-sensing hole 8 and the two rotating parts 2 are all located on the optical path of the laser, so as to ensure the accuracy of defining the boundary.
In order to facilitate the determination of the distance between two adjacent auxiliary devices, the display screen 10 is arranged on the side wall of the rotating part 2 in the embodiment, the laser ranging module 9 is arranged inside the rotating part, the laser ranging module 9, the display screen 10 and the laser receiver 6 are all electrically connected, and the display screen 10 can display the laser emission distance, so that the distance value between the two auxiliary devices can be obtained more visually and conveniently, the process of manually utilizing a tape measure to measure the distance between the two auxiliary devices is omitted, the labor intensity of personnel is further reduced, and the scribing efficiency is improved.
The laser transmitter 5, the laser receiver 6, the laser ranging module 9, and the display screen 10 in this embodiment are all common devices in the art, and the electrical connection manner therebetween is well known to those skilled in the art, and will not be described in detail in this embodiment.
Further, in the embodiment, a power supply for supplying power to the electric element on the rotating part 2 is further arranged in the fixing part 1; because the laser transmitter 5, the laser receiver 6 and the laser ranging module 9 are all fixed on the rotating part 2, the top of the rotating part 2 is also connected with a top cover 11 for sealing the rotating part through threads, a level bubble 13 for detecting whether the fixing part 1 is vertical is arranged on the top surface of the top cover 11, and level gauges 12 are arranged on the fixing part 1 and the rotating part 2; in the actual demarcation operation process, can lead to originally vertical fixed part 1 and rotation portion 2 to take place the slope, through setting up spirit level 12 and air level 13, can be when initial insertion and follow-up rotatory rotation portion 2, for the assistor provides level and vertical benchmark.
In order to facilitate the insertion of the fixing part 1 into the soil, the bottom end of the fixing part 1 in this embodiment has a tapered shape.
Example 2:
the embodiment also provides a portable field area defining method, which comprises the following steps:
1) inserting a fixing part 1 into soil at a set position, ensuring that the fixing part 1 is vertical through a level 12 and a leveling bubble 13, and taking the auxiliary device as a vertex of a defined area, wherein the direction opposite to a laser emitter 5 is the extending direction of one side of the defined area;
2) rotating the rotating part 2 by a set angle, turning on a power switch, enabling the laser emitter 5 to emit laser, inserting an auxiliary device along the laser direction, enabling a photosensitive hole 8 of the laser receiver 6 to be aligned with the laser for receiving, displaying the distance between the two auxiliary devices on the display screen 10, and adjusting the position of the latter auxiliary device according to the required distance to obtain the other vertex of the defined area;
3) repeating the step 2), and inserting a plurality of auxiliary devices to obtain all vertexes of the defined area;
4) and (4) making ridges or planting crops in the defined area along the light path.
By adopting the method, the region can be quickly demarcated, the demarcation efficiency is obviously improved, and the labor intensity of workers is reduced.
When crops are planted in a residential area, manual planting often deviates from a preset planting row and column, so that the planting rows and columns are different, the planting intervals are different, the planting density is different, the difference is large, the number of plants in a field test is different, the growth vigors of all blocks are different, the absorbed nutrient substances are more or less, the test uncertainty is caused, the interference factors are too much, and the test data are inaccurate; in order to standardize the planting distance and ensure the consistent planting density, an auxiliary device is arranged between the two auxiliary devices in the demarcated area, the distance between the auxiliary device and the end part auxiliary device is adjusted to a set distance, then the rotating part 2 on the auxiliary device is rotated by a set angle, a power switch is turned on, the laser emitter 5 emits laser, crops are planted along a laser light path, the crops can be ensured to be arranged orderly, the number and the density of the crops in a test field are ensured, and a foundation is laid for the accuracy of subsequent test data.
The height of crops planted along the laser light path is lower than that of the laser light path, and the crops cannot block the laser light path.
The adaptation according to the actual needs is within the scope of the invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A portable field area demarcation assistor is characterized by comprising a fixed part and a rotating part, wherein one end of the fixed part is inserted into soil, the other end of the fixed part is rotatably connected with the rotating part, and the connecting ends of the fixed part and the rotating part which are mutually connected are respectively provided with a scale mark and a pointer for measuring the rotating angle of the rotating part; and a laser emitter for emitting light rays along the horizontal radial direction is fixed on the rotating part.
2. The portable field area delineation aid of claim 1, wherein a laser receiver for receiving horizontal laser is further arranged on the rotating portion, and the setting height of a transmitting hole of the laser transmitter is the same as that of a photosensitive hole of the laser receiver.
3. The portable field area delineation aid of claim 2, wherein a display screen is arranged on the side wall of the rotating part, a laser ranging module is arranged inside the rotating part, the laser ranging module, the display screen and the laser receiver are all electrically connected, and the display screen can display a laser emission distance.
4. A portable field area delineation aid as claimed in claim 3 wherein a power supply is further provided within the fixed portion for powering electrical components on the rotating portion.
5. A portable field area delineation aid as claimed in any one of claims 1 to 4 wherein the top of the swivel is further threadedly connected to a cap for sealing the swivel.
6. The portable field area delineation aid of claim 5 wherein a top surface of the top cap is provided with a level vial for detecting whether the fixture is upright.
7. The portable field area delineation aid of claim 6 wherein a level is provided on both the fixed portion and the rotating portion.
8. A portable field area delineation aid as claimed in claim 1 wherein the end of the fixture for insertion into the soil is tapered.
9. A portable field area delineation method is characterized by comprising the following steps:
1) inserting a fixing part into soil at a set position, ensuring the fixing part to be vertical through a level gauge and a leveling bubble, taking the auxiliary device as a vertex of a defined area, and taking the direction opposite to the laser emitter as the extending direction of one side of the defined area;
2) rotating the rotating part by a set angle, turning on a power switch, enabling the laser transmitter to emit laser, inserting an auxiliary device along the laser direction, enabling a photosensitive hole of the laser receiver to be aligned with the laser for receiving, displaying the distance between the two auxiliary devices on a display screen, and adjusting the position of the latter auxiliary device according to the required distance to obtain the other vertex of the defined area;
3) repeating the step 2), and inserting a plurality of auxiliary devices to obtain all vertexes of the defined area;
4) and planting crops in the defined area.
10. A portable field area delineation method as claimed in claim 9, wherein an additional sub-unit is positioned between the sub-units in the delineation area and the distance between the sub-unit and the end sub-unit is adjusted to a predetermined distance, and then the rotating part of the sub-unit is rotated by a predetermined angle to turn on the power switch and the laser transmitter emits laser light to create a ridge or plant a crop along the laser path.
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CN202110732203.XA CN113447005B (en) | 2021-06-30 | 2021-06-30 | Portable field area demarcation aid and demarcation method thereof |
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CN202110732203.XA CN113447005B (en) | 2021-06-30 | 2021-06-30 | Portable field area demarcation aid and demarcation method thereof |
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CN113447005B CN113447005B (en) | 2023-10-24 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117516348A (en) * | 2024-01-04 | 2024-02-06 | 惠民县国土空间生态修复中心(惠民县土地整理储备中心) | Area measurement device for land planning |
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US4273225A (en) * | 1979-04-10 | 1981-06-16 | Swanson Carl R | Electrically operated mast for laser-controlled levelling system |
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CN208366339U (en) * | 2018-07-18 | 2019-01-11 | 四川农业大学 | A kind of portable field polygonal head device |
CN208398877U (en) * | 2018-07-27 | 2019-01-18 | 青海省畜牧兽医科学院 | The delimitation tool on field trial sample ground |
CN212692813U (en) * | 2020-08-29 | 2021-03-12 | 河南诺玛科技有限公司 | Device for measuring area of field test cell |
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GB754751A (en) * | 1953-05-09 | 1956-08-15 | Zeiss Stiftung | Fixed-base telemeter |
US4273225A (en) * | 1979-04-10 | 1981-06-16 | Swanson Carl R | Electrically operated mast for laser-controlled levelling system |
CN105638057A (en) * | 2016-01-04 | 2016-06-08 | 兰州大学 | Field experimental area setting device and method for setting experimental area using device |
CN208366339U (en) * | 2018-07-18 | 2019-01-11 | 四川农业大学 | A kind of portable field polygonal head device |
CN208398877U (en) * | 2018-07-27 | 2019-01-18 | 青海省畜牧兽医科学院 | The delimitation tool on field trial sample ground |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN117516348A (en) * | 2024-01-04 | 2024-02-06 | 惠民县国土空间生态修复中心(惠民县土地整理储备中心) | Area measurement device for land planning |
CN117516348B (en) * | 2024-01-04 | 2024-03-12 | 惠民县国土空间生态修复中心(惠民县土地整理储备中心) | Area measurement device for land planning |
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