System and method for measuring regional rainfall uniformity on basis of close-range photogrammetry principles

A technology of close-range photography and measurement principles, which is applied in the direction of rainfall/precipitation gauges, measuring devices, and photo interpretation, which can solve problems such as inaccurate measurement data and achieve accurate distribution results

Pending Publication Date: 2017-05-31
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a regional rainfall uniformity measurement scheme based on the principle of close-range photogrammetry to solve the problem of inaccurate measurement data existing in the prior art due to factors such as measurement equipment and measurement principles

Method used

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  • System and method for measuring regional rainfall uniformity on basis of close-range photogrammetry principles
  • System and method for measuring regional rainfall uniformity on basis of close-range photogrammetry principles
  • System and method for measuring regional rainfall uniformity on basis of close-range photogrammetry principles

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Experimental program
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Effect test

Embodiment 1

[0025] refer to figure 1 , shows a structural block diagram of a regional rainfall uniformity measurement system based on the principle of close-range photogrammetry according to Embodiment 1 of the present invention.

[0026] The regional rainfall uniformity measurement system based on the close-range photogrammetry principle of the embodiment of the present invention includes: a straight-line laser generator 101, a high-speed synchronizer 102, a digital image processor 103, a first camera 104, a second camera 105 and an image Calibration flag 106 .

[0027] The horizontal laser generator 101 is aligned with the region to be measured, and the light beam emitted by the laser generator is aligned with the region 107 to be measured. The first camera 104 and the second camera 105 are arranged on the front of the laser generator 101. The focus center of the camera above is the center of the area to be measured, and the image correction marks 106 are arranged in the shooting field...

Embodiment 2

[0039] still refer to figure 1 , the regional rainfall uniformity measurement system based on the principle of close-range photogrammetry according to the second embodiment of the present invention will be described.

[0040] The regional rainfall uniformity measurement system based on the close-range photogrammetry principle of the embodiment of the present invention includes: a straight-line laser generator 101, a high-speed synchronizer 102, a digital image processor 103, a first camera 104, a second camera 105 and an image Calibration flag 106 .

[0041] The inline laser generator 101 is horizontally aligned with the area to be measured 107, and the light beam emitted by the inline laser generator 101 is horizontally aligned with the area to be measured, and the light beam is red or green.

[0042] The first camera 104 and the second camera 105 are arranged directly above the in-line laser generator, and the two cameras are symmetrically arranged on both sides of the cent...

Embodiment 3

[0069] refer to image 3 , shows a flow chart of the steps of a method for measuring regional rainfall uniformity based on the principle of close-range photogrammetry in Embodiment 3 of the present invention.

[0070] The regional rainfall uniformity measurement method based on the close-range photogrammetry principle provided by the embodiment of the present invention includes the following steps:

[0071] Step 301: Adjust the in-line laser generator so that the light beam emitted by the in-line laser generator passes through the area to be measured horizontally.

[0072] The beam emitted by the inline laser generator can be red or green. That is to say, the straight-line laser generator can be a red light generator or a green light generator, and the light beam emitted by the straight-line laser generator passes through the area to be measured horizontally.

[0073] Step 302: Record the distance and position coordinates between the image correction marks.

[0074] The rec...

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Abstract

The invention provides a system and a method for measuring regional rainfall uniformity on the basis of close-range photogrammetry principles. The system comprises a line laser generator, a high-speed synchronizer, a digital image processor, two photographic apparatuses and image correction marks. Light beams emitted by the line laser generator are reflected by raindrops in to-be-measured regions and then are respectively imaged in images photographed by the two photographic apparatuses; preset quantities of groups of images are photographed by the photographic apparatuses, and the images photographed by the photographic apparatuses are analyzed by the digital image processor to obtain spatial distribution diagrams of the regional rainfall uniformity. According to the scheme, the system and the method have the advantages that the images generated on the basis of light reflected by the raindrops are correspondingly analyzed, and accordingly the regional rainfall uniformity can be accurately measured; the method is free of influence of human factors and equipment factors; the light beams generated by the line laser generator are positioned above the ground, accordingly, the system and the method are free of influence of topographic factors, and measured rainfall uniformity distribution results are accurate.

Description

technical field [0001] The invention relates to the technical field of artificial rainfall parameter measurement or sprinkler irrigation equipment parameter measurement, in particular to a regional rainfall uniformity measurement system and method based on the principle of close-range photogrammetry. Background technique [0002] The current methods for measuring rainfall uniformity mainly include the following: one is to use multiple rain gauges to be arranged in a certain form in a designated area, and to measure the rainfall uniformity after a period of time, such as the widely used downspout artificial rainfall device. This kind of rainfall measurement device is formed by combining multiple nozzles with different flow sections, which can simulate rainfall with a certain intensity and uniformity. The rainfall areas formed by different nozzles are all circular, but at different heights or at the same height. There are differences in the intensity distribution, so the accu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14G01C11/12
CPCG01C11/12G01W1/14
Inventor 王英赵勇刘家宏龚家国冶运涛陈根发邓晓雅石彬
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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