CN110849816A - Ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity - Google Patents
Ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity Download PDFInfo
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- CN110849816A CN110849816A CN201911294126.3A CN201911294126A CN110849816A CN 110849816 A CN110849816 A CN 110849816A CN 201911294126 A CN201911294126 A CN 201911294126A CN 110849816 A CN110849816 A CN 110849816A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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Abstract
The invention discloses a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity, which comprises a device body, wherein the device body is in a square shape; the square-shaped device body comprises a plurality of square grids; the grid includes four grid side lengths, and a screw is all seted up to the both sides end of grid side length, and the screw of adjacent grid side length overlaps to realize the connection of adjacent grid side length fixedly through inserting the screw in the screw. The device has clear structure texture, the grids are uniformly distributed, and the regular small grids are used as sampling points, so that the accuracy is uniformly distributed in space after interpolation calculation is carried out on the sampling result, and the reliability is higher; the grid edge is composed of the reflector plates made of aluminum alloy materials, the texture of the grid edge on an unmanned aerial vehicle image is clear, the grid intersection points are distinct and outstanding, the intersection points are used as image control points, the pricking point errors can be basically eliminated during data processing, and the accuracy of the obtained image control points is higher.
Description
Technical Field
The invention belongs to the technical field of soil humidity observation, and particularly relates to a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity.
Background
Soil humidity is always a ground surface physical quantity which people pay attention to research, is an index of global ground surface water circulation, is an important parameter in the fields of agriculture, meteorology and hydrology research, is an important parameter for describing ground surface conditions, and has great significance for accurately observing soil humidity in a large area range in the fields of agriculture, hydrology, meteorology and the like. With the development of modern crop science, higher requirements are provided for the time and space resolution of acquiring crop information such as soil humidity, and the analysis and identification of crop growth information are assisted by rapidly acquiring soil humidity information of single plants on a field scale, so that the method is the internal requirement of digital agriculture and precision agriculture at the present stage. The traditional method for inverting the earth surface soil humidity based on ground single-point measurement and satellite remote sensing has the defects of low space-time resolution and low precision, and is no longer suitable for fine agricultural production and management. The low-altitude unmanned remote sensing platform is gradually becoming an important means for acquiring field crop information by virtue of the advantages of flexibility, low cost and high space-time resolution. The inversion of soil humidity of single plants on a field scale by using multispectral, hyperspectral or even multipolar SAR sensors carried by an unmanned aerial vehicle remote sensing platform is an emerging technology. According to the technology, the field soil humidity thematic map with large area, high precision and high spatial resolution can be obtained on the unmanned aerial vehicle image only by providing priori information through a small amount of ground soil humidity sampling data.
Practical experience and research show that: and performing low-altitude unmanned remote sensing inversion on a field scale, wherein the ground actual measurement soil humidity sample is required to be matched with the spatial resolution of the unmanned aerial vehicle image. The traditional ground soil humidity sampling method is subjective, sampling points are selected manually, the sampling method is low in spatial resolution of a sample, the spatial distribution of the soil humidity precision after interpolation is uneven, the reliability is low, low-altitude unmanned images cannot be matched, and the method is only suitable for soil humidity inversion work of satellite-borne remote sensing.
In addition, use unmanned aerial vehicle remote sensing measurement, unmanned aerial vehicle's flight gesture always has undulantly for there is a large amount of oblique images in the photographic result, this also will lead to ground actual measurement soil moisture appearance method unable accuracy to match with the unmanned aerial vehicle image. Therefore, in order to successfully utilize the low-altitude unmanned remote sensing platform to invert the soil humidity of the single crop on the field scale, the accuracy of the image needs to be ensured, namely, the unmanned aerial vehicle image is subjected to data processing through arranging the image control points, and the inclination of the photo of the unmanned aerial vehicle is corrected. However, coordinates of the traditional unmanned aerial vehicle remote sensing ground image control points depend on a fixed reference object, and on the field scale, crop types are generally single, so that the phase control points with clear textures and easy identification cannot be obtained.
Disclosure of Invention
The invention aims to solve or improve the problems by providing a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity comprises a device body, wherein the device body is square; the square-shaped device body comprises a plurality of square grids; the grid comprises four grid side lengths, two side ends of each grid side length are respectively provided with a screw hole, the screw holes of the adjacent grid side lengths are overlapped, and the connection and fixation of the adjacent grid side lengths are realized by inserting screws into the screw holes;
the side length of the grid is a reflector plate made of aluminum alloy, the length of the reflector plate is 27cm, the width of the reflector plate is 2cm, and the thickness of the reflector plate is 1 mm.
Preferably, the device body in the square shape has a side length of 100 cm.
Preferably, the grid has a grid side length of 25 cm.
Preferably, the hole diameter of the screw hole is 7 mm.
Preferably, the distance between two screw holes located on the same reflector plate is 25 cm.
Preferably, the screws include 8 long screws and 17 short screws.
Preferably, 8 long screws pass through the screw holes and are inserted into the ground surface to realize the fixation of the device body.
Preferably, the 8 long screws are respectively located on the peripheral side length of the device body, and the short screws are located between the adjacent long screws.
The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity provided by the invention has the following beneficial effects:
the device has clear structure texture, the grids are uniformly distributed, and the regular small grids are used as sampling points, so that the accuracy is uniformly distributed in space after interpolation calculation is carried out on the sampling result, and the reliability is higher; the grid edge is composed of the reflector plates made of aluminum alloy materials, the texture of the grid edge on an unmanned aerial vehicle image is clear, the grid intersection points are distinct and outstanding, the intersection points are used as image control points, the pricking point errors can be basically eliminated during data processing, and the accuracy of the obtained image control points is higher.
Drawings
Fig. 1 is a device body structure diagram of a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity.
FIG. 2 is a structure diagram of a single reflector of a ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity.
FIG. 3 is a front view of a ground sampling grid device applied to low altitude unmanned remote sensing inversion of soil humidity.
Wherein, 1, the device body; 2. the side length of the grid; 21. a screw hole; 3. a screw; 31. short screws; 32. a long screw; 4. and (4) grid.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
According to an embodiment of the application, referring to fig. 1-3, the ground sampling grid 4 device applied to low-altitude unmanned remote sensing inversion of soil humidity according to the scheme comprises a device body 1, wherein the device body 1 is in a square shape and comprises a plurality of square grids 4, and the peripheral side length of the whole device body 1 is 100 cm.
The grid 4 is square, and includes four grid side lengths 2, and a screw 21 is all seted up to the both sides end of grid side length 2, and the screw 21 of adjacent grid side length 2 overlaps to realize the connection of adjacent grid side length 2 fixedly through inserting screw 3 in screw 21.
The side length 2 of the grid 4 is 25cm, the side length 2 of the grid is a reflector plate made of aluminum alloy, the length of the reflector plate is 27cm, the width of the reflector plate is 2cm, and the thickness of the reflector plate is 1 mm.
Wherein, the aperture of screw 21 is 7mm, and the distance between two screw 21 that lie in same reflector plate is 25 cm.
The screws 3 comprise 8 long screws 32 and 17 short screws 31, and the 8 long screws 32 penetrate through the screw holes 21 and are inserted into the ground surface to realize the fixation of the device body 1. The 8 long screws 32 are respectively located on the peripheral side length of the device body 1, and the short screws 31 are located between the adjacent long screws 32.
The grid 4 device has the advantages of small occupied area, less required space, low manufacturing cost, convenience in use, uniform precision of sample statistical results, high reliability, capability of obtaining high-precision image control point coordinates, and suitability for relevant research work such as soil humidity remote sensing inversion by unmanned aerial vehicles on the field scale.
Before the device is used, 4 aluminum alloy reflectors are combined into a small square with the side length of 25cm through connecting screws 3, and the rest aluminum alloy reflectors are sequentially expanded into a large square with the side length of 1m through the screws 3 on the basis of the small square.
During the use, insert the regional messenger of appearance side with 8 long screws 32 and make it fixed, can carry out ground soil moisture in every little square and take a sample, then select a net 4 nodical points as controlling the phase point at random for unmanned aerial vehicle can acquire the accurate three-dimensional coordinate of image accuse point fast.
The soil humidity sampling and phase control point coordinate measuring work performed by the ground sampling grid 4 device is synchronous with the flight time of the unmanned aerial vehicle as much as possible, so that the synchronism of ground measurement and unmanned aerial vehicle remote sensing is ensured. After the measurement is finished, the grid 4 device is retracted, the screws 3 are sequentially disassembled, and finally all the disassembled reflectors and the screws 3 are packaged and moved back to a storehouse for storage.
The device has clear structure texture, the grids 4 are uniformly distributed, and the regular small grids 4 are used as sampling points, so that the accuracy is uniformly distributed in space after interpolation calculation is carried out on the sampling result, and the reliability is higher; the 4 limits of net are constituteed by the reflector plate of aluminum alloy material, and it is clear that its texture is gone up in the unmanned aerial vehicle image, and 4 nodical outstanding points of net are distinct to the nodical point of regard as the image control point, can eliminate the thorn point error basically when data processing, make the image control point precision of acquireing higher.
Except this, accomodate easily, this device is formed by the rectangular shape reflector plate of the same structure through smooth and smooth screw 3 connection, therefore, the device can be through reflector plate and connecting screw 3 temporary assembly when using, dismantles it after finishing using, can not occupy too big space when depositing.
The expansibility is strong, and the device can meet the requirements of ground sampling areas of different scales by changing the use number of the reflector plates and the connected screws 3. For example, the sampling area of 2 m x2 m only needs to increase the number of the reflection sheets and the connecting screws 3, and the sampling area of 50 cm x50 cm only needs to decrease the number of the reflection sheets and the connecting screws 3.
The installation is simple, and during actual measurement soil moisture sampling, only need to expand the device equipment back, insert long screw 323 ground can.
The manufacturing is simple, and only aluminum alloy materials are needed to be connected through the screws 3.
While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. The utility model provides a be applied to ground sampling grid device of low latitude unmanned remote sensing inversion soil moisture which characterized in that: comprises a device body, wherein the device body is square; the square-shaped device body comprises a plurality of square grids; the grid comprises four grid side lengths, two side ends of each grid side length are respectively provided with a screw hole, the screw holes of the adjacent grid side lengths are overlapped, and the connection and fixation of the adjacent grid side lengths are realized by inserting screws into the screw holes;
the side length of the grid is a reflector plate made of aluminum alloy, the length of the reflector plate is 27cm, the width of the reflector plate is 2cm, and the thickness of the reflector plate is 1 mm.
2. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 1, is characterized in that: the side length of the device body in a square shape is 100 cm.
3. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 1, is characterized in that: the grid side length of the grid is 25 cm.
4. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 1, is characterized in that: the aperture of the screw hole is 7 mm.
5. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 1, is characterized in that: the distance between two screw holes on the same reflector plate is 25 cm.
6. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 1, is characterized in that: the screws include 8 long screws and 17 short screws.
7. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 6, is characterized in that: 8 the long screws pass through the screw holes and are inserted into the ground surface to fix the device body.
8. The ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity according to claim 6, is characterized in that: the 8 long screws are respectively positioned on the peripheral side length of the device body, and the short screws are arranged between the adjacent long screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911294126.3A CN110849816A (en) | 2019-12-16 | 2019-12-16 | Ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911294126.3A CN110849816A (en) | 2019-12-16 | 2019-12-16 | Ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity |
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| CN110849816A true CN110849816A (en) | 2020-02-28 |
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| CN201911294126.3A Pending CN110849816A (en) | 2019-12-16 | 2019-12-16 | Ground sampling grid device applied to low-altitude unmanned remote sensing inversion of soil humidity |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372282A (en) * | 2022-10-19 | 2022-11-22 | 深圳大学 | Farmland soil water content monitoring method based on hyperspectral image of unmanned aerial vehicle |
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2019
- 2019-12-16 CN CN201911294126.3A patent/CN110849816A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115372282A (en) * | 2022-10-19 | 2022-11-22 | 深圳大学 | Farmland soil water content monitoring method based on hyperspectral image of unmanned aerial vehicle |
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