CN206627644U - A kind of Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle - Google Patents
A kind of Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle Download PDFInfo
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- CN206627644U CN206627644U CN201720158281.2U CN201720158281U CN206627644U CN 206627644 U CN206627644 U CN 206627644U CN 201720158281 U CN201720158281 U CN 201720158281U CN 206627644 U CN206627644 U CN 206627644U
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Abstract
The utility model, which provides a kind of Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle, to be included：One word laser generator, high speed synchroniser, Digital Image Processor, two cameras and image rectification mark；The light beam that one word laser generator is sent is imaged in the image of two camera shootings respectively after the raindrop reflection in region to be measured；Camera shoots predetermined number group image, and the image that Digital Image Processor is shot to camera is analyzed, and obtains Regional Rainfall uniformity spatial distribution map.Pass through scheme of the present utility model, image based on the reflection photogenerated to raindrop, which carries out corresponding graphical analysis, can accurately measure the Regional Rainfall uniformity, and this method is not influenceed by human factor and apparatus factor, simultaneously, because the light beam that a word laser generator is sent is on ground, do not influenceed by orographic factor, the rainfall uniformity distribution results of measurement are more accurate.
Description
Technical field
Rain making parametric measurement or sprinkling irrigation equipment parametric measurement technical field are the utility model is related to, more particularly to it is a kind of
Regional Rainfall uniformity measuring system and method based on close-range photogrammetry principle.
Background technology
The method of the current measurement rainfall uniformity mainly has following several：One kind is in designated area using multiple rainfall gauges
It is interior to be laid according to certain form, the rainfall uniformity is converted after determining a period of time, the following spray being such as widely used at present is artificial
Rainer.This kind of rainfall measurement apparatus is to combine to be formed by multiple different flow section shower nozzles, can simulate some strength and
The rainfall of the uniformity, the rainfall region that different shower nozzles is formed is circle, but circle when different height or sustained height
Intensity distribution in domain has differences, therefore the degree of accuracy of measurement result is low.Another measuring method is to use laser raindrop size distribution
Instrument is to specifying the raindrop distribution in zonule to measure.
For above two prior art, some drawbacks be present, first way is people due to udometric installation position
For setting, therefore there is larger subjective factor in whole device in layout, and udometric control position just to the uniformity
Calculating has considerable influence, therefore, measurement data can be caused inaccurate.Moreover, this method is difficult measure different height position
The rainfall uniformity.Simultaneously using trial zone place is taken in continuous mode during such method, often needed after the completion of measure
Rain controller is closed, pilot region etc. is laid again, the uncertainty during increase experiment, influences test efficiency.Another kind side
For method due to being limited by measuring principle, the region of measure is very small, the general composition for being only used for determining raindrop diameter, it is difficult to realize compared with
The measurement of the rainfall uniformity in big region.
In summary, the method for the uniformity of existing measurement rainfall, due to factors such as measuring apparatus and measuring principles
Influence, cause rainfall uniformity measurement result inaccurate.
The content of the invention
The utility model provides a kind of Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle, to solve
Due to factors such as measuring apparatus and measuring principles present in prior art, the problem of causing measurement data inaccuracy.
In order to solve the above problems, the utility model discloses a kind of Regional Rainfall based on close-range photogrammetry principle is equal
Evenness measurement apparatus, described device include：One word laser generator, high speed synchroniser, Digital Image Processor, two cameras
And image rectification mark；The one word laser generator horizontal aligument region to be measured is set, the word laser generator institute
The beam level sent passes through region to be measured, and two cameras are arranged on directly over the word laser generator, described
The focusing center of camera is the regional center to be measured；Described image calibration mark is arranged on the shooting visual field of the camera
It is interior, and record has the distance between each image rectification mark and position coordinates in Digital Image Processor；The high-speed synchronous
Device is connected with the word laser generator and the camera respectively；The high speed synchroniser is according to prefixed time interval, control
Make the word laser generator and send light beam, while control the camera to carry out image taking, institute to the region to be measured
Light beam that a word laser generator sends is stated after the raindrop reflection in the region to be measured, is clapped respectively in two cameras
It is imaged in the image taken the photograph；The camera shoots predetermined number group image, and the Digital Image Processor is clapped the camera
The image taken the photograph is analyzed, and obtains Regional Rainfall uniformity spatial distribution map.
Preferably, two cameras are set by axisymmetrical of the axis of the word laser generator.
Preferably, the light beam is feux rouges or green glow.
Preferably, the image that the Digital Image Processor is shot to the camera carries out close-range photogrammetry analysis,
The space three-dimensional distribution map of raindrop illuminated by laser beam is obtained, with formation zone rainfall uniformity spatial distribution map.
Preferably, the Digital Image Processor includes：Stereogram extraction unit, space image generation unit, plane are cut
Take unit, superpositing unit and spatial distribution map generation unit；The stereogram extraction unit extracts from each image pair
Comprising each stereogram, each stereogram answers a point position, and two cameras are image in the image that synchronization is shot
It is right；The space image generation unit is directed to each stereogram, generates space image, obtains the three-dimensional image space point of each image pair
Cloth, wherein, each space image is then a hot spot；The plane interception unit is directed to each space image spatial distribution, and interception is three-dimensional
As distribution section；Whole space image sections of generation are superimposed by the superpositing unit, obtain identical region to be measured, same point position is stood
The superposition number of body image；Identical region to be measured that the spatial distribution map generation unit obtains according to superposition, same point position it is vertical
Body image is superimposed number, formation zone rainfall uniformity spatial distribution map.
Compared with prior art, the utility model has advantages below：
The Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle that the utility model embodiment provides, will
One word laser generator horizontal aligument region to be measured is set, and two cameras are arranged on directly over a word laser generator, and two
Individual camera is symmetricly set on a word laser generator axis both sides, and high speed synchroniser is respectively with a word laser generator and taking the photograph
As device connects；High speed synchroniser is used for according to prefixed time interval, and one word laser generator of control sends light beam, while control is taken the photograph
Shadow device to region to be measured carry out image taking, the light beam that a word laser generator is sent through in region to be measured raindrop reflection after,
It is imaged respectively in the image of camera shooting；Camera shoots predetermined number group image, and Digital Image Processor is to camera
The image of shooting is analyzed, and obtains Regional Rainfall uniformity spatial distribution map.It can be seen that it is based on by provided by the utility model
The Regional Rainfall uniformity measurement apparatus of digital image processing techniques, the image based on the reflection photogenerated to raindrop carry out corresponding
Graphical analysis can accurately measure the Regional Rainfall uniformity, and the device is not by human factor and the shadow of apparatus factor
Ring, simultaneously as the light beam that a word laser generator is sent is on ground, do not influenceed by orographic factor, the drop of measurement
Rain uniformity distribution results are more accurate.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model embodiment, below by the utility model embodiment
The required accompanying drawing used is briefly described in description, it should be apparent that, drawings in the following description are only that this practicality is new
Some embodiments of type, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The knot of the Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle of Fig. 1 the utility model embodiments
Structure block diagram；
The structured flowchart of the Digital Image Processor of Fig. 2 the utility model embodiments two；
Light path schematic diagram when Fig. 3 is laser irradiation raindrop.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that described embodiment is the utility model part of the embodiment, rather than whole implementation
Example.Based on the embodiment in the utility model, those of ordinary skill in the art are obtained under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment one
Reference picture 1, show a kind of Regional Rainfall based on close-range photogrammetry principle of the utility model embodiment one
The structured flowchart of uniformity measurement apparatus.
The Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle of the utility model embodiment includes：One
Word laser generator 101, high speed synchroniser 102, Digital Image Processor 103, the first camera 104, the second camera 105 with
And image rectification mark 106.
The horizontal aligument of one word laser generator 101 region to be measured, a word laser generator light out light beam horizontal aligument
Region 107 to be measured, the first camera 104 and the second camera 105 are arranged on the surface camera of a word laser generator 101
Focusing center be regional center to be measured, image rectification mark 106 is arranged in the shooting visual field of camera, positioned at region to be measured
Four angles on, and the distance between each image rectification mark and position coordinates are recorded in Digital Image Processor, a word laser
It is feux rouges or green glow that device, which sends light beam,.
High speed synchroniser 102 connects with a word laser generator 101 and the first image pick-up device 104, the second image pick-up device 105 respectively
Connect；High speed synchroniser 102 sends light beam according to prefixed time interval, one word laser generator 101 of control, while controls first to take the photograph
Shadow device 104 and and the second camera 105 to region to be measured carry out image taking, the light that a word laser generator 101 is sent
Beam after the raindrop reflection in region to be measured, respectively in the image that the first camera 104 and the second camera 105 are shot into
Picture.
Camera shoots predetermined number group image, and Digital Image Processor 103 is based on close shot to the image that camera is shot
Photogrammetry principles carry out graphical analysis, obtain Regional Rainfall uniformity spatial distribution map.
Wherein, camera can be high speed high-definition camera, and camera is when carrying out image taking, every between preset time
Every image of the extraction single frames picture as captured by from screen.
It should be noted that a word laser generator is a kind of convenient and practical positioning instrument.It can be widely used for measurement drop
The positioning instrument of the rain uniformity or other measurement process.
One word laser generator svelteness, it is compact, it is easily installed, accurately positioning skill can be provided for the utility model
Art, it can be arranged on the horizontal or vertical face using machinery, there is provided a visible straight line laser so that entirely rainfall is being surveyed
A visible, non-contacting position line is produced during amount, the advantages of facilitating production operation and improve production efficiency, and is swashed
Light can arbitrarily finely tune in three dimensions, reach best use effect, the glancing incidence beam thickness of laser is 2 to 6 millis
The light of rice, therefore, the thickness in region to be measured is 2 to 6 millimeters.
Two cameras are arranged on directly over a word laser generator, and two cameras are symmetricly set on a word laser
Generator axis both sides, the focusing center of camera are regional center to be measured, and high speed synchroniser according to preset time every control
Make a word laser generator and send light beam, it is necessary to explanation, those skilled in the art can according to actual conditions to it is default when
Between be spaced and selected, prefixed time interval can be arranged to 5ms, 6ms, 10ms etc., this is not specifically limited.
The time interval is that laser is sent to the time completed in raindrop needed for reflection, the time interval and a word laser
Generator is relevant with treating interval between side region and raindrop size to be measured.
While high speed synchroniser controls a word laser generator to send light beam according to prefixed time interval, due at a high speed
Synchronizer is connected with a word laser generator with the first image pick-up device and the second image pick-up device respectively, when a word laser generator is sent
While light beam, two image pick-up devices can be shot to region to be measured simultaneously, and generate image, and the image of generation swashs for a word
The light beam that optical generator is sent image captured after raindrop reflect.
It should be noted that those skilled in the art can set according to actual conditions to the quantity of image, in order to
So that the accuracy of measurement data, each image pick-up device can shoot a variety of images, such as：3 groups, 4 groups or 5 groups etc., to this not
Make concrete restriction, and the picture in every group can be any amounts such as 5,6 or 8.
The Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle that the utility model embodiment provides, will
One word laser generator horizontal aligument region to be measured is set, and two cameras are arranged on directly over a word laser generator, at a high speed
Synchronizer is connected with a word laser generator and image pick-up device respectively；High speed synchroniser is used for according to prefixed time interval, control one
Word laser generator sends light beam, while controls camera to carry out image taking to region to be measured, and a word laser generator is sent
Light beam through in region to be measured raindrop reflection after, respectively camera shooting image in be imaged；Camera shoots present count
Amount group image, the image that Digital Image Processor is shot to camera are analyzed, and obtain Regional Rainfall uniformity spatial distribution
Figure.It can be seen that by the Regional Rainfall uniformity measurement apparatus provided by the utility model based on close-range photogrammetry principle, it is based on
The image of reflection photogenerated to raindrop carries out corresponding graphical analysis can be to accurately measure the Regional Rainfall uniformity, and is somebody's turn to do
Device is not influenceed by human factor and apparatus factor, and the rainfall uniformity distribution results of measurement are more accurate.
Embodiment two
Still reference picture 1, it is uniform to the Regional Rainfall based on close-range photogrammetry principle of the utility model embodiment two
Degree measurement apparatus illustrates.
The Regional Rainfall uniformity measuring system based on close-range photogrammetry principle of the utility model embodiment includes：One
Word laser generator 101, high speed synchroniser 102, Digital Image Processor 103, the first camera 104, the second camera 105 with
And image rectification mark 106.
The horizontal aligument of one word laser generator 101 region 107 to be measured is set, and a word laser generator 101 lights out
Beam level is directed at region to be measured, and light beam is feux rouges or green glow.
First camera 104 and the second camera 105 are arranged on directly over a word laser generator, and two cameras
A word laser generator axis both sides are symmetricly set on, the focusing center of two cameras is regional center to be measured.
High speed synchroniser 102 connects with a word laser generator 101 and the first image pick-up device 104, the second image pick-up device 105 respectively
Connect；High speed synchroniser 102 sends light beam according to prefixed time interval, one word laser generator 101 of control, while controls first to take the photograph
Shadow device 104 and and the second camera 105 to region to be measured carry out image taking, the light that a word laser generator 101 is sent
Beam after the raindrop reflection in region to be measured, respectively in the image that the first camera 104 and the second camera 105 are shot into
Picture.
Wherein, index path during laser irradiation raindrop is as shown in Figure 3.As can be known from Fig. 3, during laser irradiation raindrop, can produce
Give birth to two secondary reflections and reflect twice, light specifically moves towards shown in Figure 3.
Camera shoots predetermined number group image, and Digital Image Processor 103 is based on close shot to the image that camera is shot
Photogrammetry principles carry out graphical analysis, obtain Regional Rainfall uniformity spatial distribution map.
It should be noted that a word laser is a kind of convenient and practical positioning instrument.It is equal to can be widely used for measurement rainfall
The positioning instrument of evenness or other measurement process.
Two cameras are arranged on directly over a word laser generator, and two cameras are symmetricly set on a word laser
Generator axis both sides, the focusing center of camera are regional center to be measured, and high speed synchroniser according to preset time every control
Make a word laser generator and send light beam, it is necessary to explanation, those skilled in the art can according to actual conditions to it is default when
Between be spaced and selected, prefixed time interval can be arranged to several milliseconds, such as：5 milliseconds, 6 milliseconds, 8 milliseconds etc., this practicality
This is not specifically limited in new embodiment.
While high speed synchroniser sends light beam according to prefixed time interval one word laser generator of control, control two is taken the photograph
As device is shot to region to be measured, and image is generated, and the light beam warp that the image generated sends for a word laser generator
Cross image captured after raindrop reflect.
It should be noted that those skilled in the art can set according to actual conditions to the quantity of image, in order to
So that the accuracy of measurement data, each image pick-up device can shoot multiple series of images, such as 3 groups, 4 groups or 5 groups etc., and this is not made
Concrete restriction, and 5 images are included in every group.
The image of camera shooting can be sent to Digital Image Processor in real time by wireless network, can also be in whole
After the completion of image taking, image copy is to data and image processing device as captured by technical staff by camera.
The multiple series of images collected to camera, close-range photogrammetry analysis is carried out by Digital Image Processor, you can
The space three-dimensional distribution map of raindrop illuminated by laser beam is obtained, with formation zone rainfall uniformity spatial distribution map, distribution map
Generating principle is as follows：
The structured flowchart of Digital Image Processor is as shown in Fig. 2 Digital Image Processor 103 includes：Stereogram is extracted
Unit 1031, space image generation unit 1032, plane interception unit 1033, superpositing unit 1034 and spatial distribution map generation are single
Member 1035.The each unit included in Digital Image Processor is the hardware module with data-handling capacity, in the hardware module
Programming has computer program.
Each stereogram that stereogram extraction unit 1031 includes from the extraction of each image pair, each stereogram should
One point position, two cameras are image pair in the image that synchronization is shot.
Stereogram will be extracted in the image of generation to raindrop stereo-picture.Because the image of image pick-up device shooting is flat
Face image, in Regional Rainfall uniformity detection process, the detection of the uniformity and inconvenience are carried out using plane picture, this
When need to extract the stereogram in image.
First, stereogram is the remote sensing image of two areals, is shot from different perspectives, and acquisition has weight
Folded region, under certain condition, using special instrument or naked eyes it can be seen that stereopsis, can be carried out by stereopsis
Including measurement, generation DEM (Digital Elevation Model, digital elevation model), it is with one group of orderly array of values
Form represents a kind of actual ground model of ground elevation.DEM can also derive from landforms spy in addition to including ground elevation information
Property, including the gradient, slope aspect etc., features of terrain parameter, including mountain peak, ridge, Plain, plane, river course and cheuch can also be calculated
Deng.
The extraction relative to image neutral body can use the method based on synthetic aperture radar stereopsis generation DEM.
Because microwave has the characteristics that to penetrate cloud and mist, sleet so that synthetic aperture radar can not be limited scanning by weather and time
Imaging.
Or using the DEM extractions based on ASTER remote sensing stereograms, ASTER satellite sensors are can to shoot solid
As to the representative in sensor, there is quality of data stabilization, cover the characteristics of extensive, cheap.
It should be noted that those skilled in the art can select according to the method that actual conditions are extracted to stereogram
Select, this is not specifically limited.In the utility model embodiment, the space image of three-dimensional relative reduction raindrop is extracted.
The picture that above-mentioned stereogram extraction unit has been extracted is right, by space image generation unit 1032 for each three-dimensional
As right, generation space image, the space image spatial distribution of each image pair is obtained, wherein, each space image is then a hot spot.
Plane interception unit 1033 is directed to each space image spatial distribution, interception space image distribution section.
The thickness that light occurs according to word laser generator when shooting for the specific section cut is closely bound up.
Whole space image sections of generation are superimposed by superpositing unit 1034, and it is three-dimensional to obtain identical region to be measured, same point position
The superposition number of picture.
Whole stereo-picture interfaces of extraction are overlapped and hot spot can also be overlapped using PS, are obtained same
The number of the hot spot of same point position in region to be measured, facilitates follow-up processing.Except of course that use PS (Adobe Photoshop, figure
As processing software) to can also be overlapped outside three-dimensional imaging importing using ENVI softwares to stereo-picture.
Specifically, remote sensing images and polar plot are opened first in ENVI, if it is desired to realizing the function of superposition, image is necessary
There is geocoding.So registration must be carried out to the remote sensing images of trial zone using ground control point GCP, GCP is in original graph
Image space and the same place found on standard (correction) space (such as polar plot), GCP must be more accurate, and it directly affects geometry
The precision of fine correction, thus same place all selects easy pinpoint characteristic point (such as small pond, linear ground object in area is studied
Crosspoint etc.).If GCP selections are inaccurate, GCP numbers are very few, GCP irrational distributions or distortion mathematical modeling can not be well
Reflect geometric distortion process, then can cause the precise decreasing of geometric correction.
The superposition of remote sensing images and polar plot has been carried out using ENVI softwares, has obtained remote sensing images and polar plot synthesis display
Map, possess and draw the far richer information content of map than simple line of vector, there is the characteristics of directly perceived readable, for regarding for people
Feel the degree of accuracy of the Visualization degree and aid decision that directly perceive.
The space image superposition in identical region, same point position to be measured that spatial distribution map generation unit 1035 obtains according to superposition
Number, formation zone rainfall uniformity spatial distribution map.
The Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle that the utility model embodiment provides, will
One word laser generator horizontal aligument region to be measured is set, two cameras be arranged on the word laser generator just on
Side, high speed synchroniser are connected with a word laser generator and image pick-up device respectively；High speed synchroniser is used for according to prefixed time interval,
Control a word laser generator to send light beam, while control camera to carry out image taking to region to be measured, a word laser occurs
The light beam that device is sent is imaged in the image of camera shooting respectively after the raindrop reflection in region to be measured；Camera is shot
Predetermined number group image, the image that Digital Image Processor is shot to camera are analyzed, and obtain Regional Rainfall uniformity sky
Between distribution map.It can be seen that dress is measured by the Regional Rainfall uniformity provided by the utility model based on close-range photogrammetry principle
Put, the image based on the reflection photogenerated to raindrop carries out corresponding graphical analysis can be uniform to accurately measure Regional Rainfall
Degree, and the device is not influenceed by human factor and apparatus factor, the rainfall uniformity distribution results of measurement are more accurate.
Each embodiment in this specification is described by the way of progressive, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar part mutually referring to.For system embodiment
For, because it is substantially similar to embodiment of the method, so description is fairly simple, referring to the portion of embodiment of the method in place of correlation
Defend oneself bright.
A kind of Regional Rainfall uniformity based on close-range photogrammetry principle provided by the utility model is measured above
Device, it is described in detail, specific case used herein is explained principle of the present utility model and embodiment
State, the explanation of above example is only intended to help and understands method and its core concept of the present utility model；Meanwhile for ability
The those skilled in the art in domain, according to thought of the present utility model, change is had in specific embodiments and applications
Place, in summary, this specification content should not be construed as to limitation of the present utility model.
Algorithm and display be not inherently related to any certain computer, electronic system or miscellaneous equipment provided herein.
Various general-purpose systems can also be used together with teaching based on this.As described above, required by constructing this kind of system
Structure be obvious.In addition, the utility model is not also directed to any certain programmed language.It should be understood that it can utilize
Various programming languages realize content of the present utility model described here, and the description done above to language-specific be in order to
Disclose preferred forms of the present utility model.
In the specification that this place provides, numerous specific details are set forth.It is it is to be appreciated, however, that of the present utility model
Embodiment can be put into practice in the case of these no details.In some instances, be not been shown in detail known method,
Structure and technology, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify open and help to understand one or more of each utility model aspect,
In the description to exemplary embodiment of the present utility model above, each feature of the present utility model is grouped together into sometimes
In single embodiment, figure or descriptions thereof.However, the method for the disclosure should not be construed to be intended to as follows：Want
Seek the requires of the utility model features more more than the feature being expressly recited in each claim of protection.More properly
Say, as the following claims reflect as, be in terms of utility model less than single embodiment disclosed above
All features.Therefore, it then follows thus claims of embodiment are expressly incorporated in the embodiment, wherein often
Individual claim is all used as separate embodiments of the present utility model in itself.
Those skilled in the art, which are appreciated that, to be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more equipment different from the embodiment.Can be the module or list in embodiment
Member or component be combined into a module or unit or component, and can be divided into addition multiple submodule or subelement or
Sub-component.In addition at least some in such feature and/or process or unit exclude each other, it can use any
Combination is disclosed to all features disclosed in this specification (including adjoint claim, summary and accompanying drawing) and so to appoint
Where all processes or unit of method or equipment are combined.Unless expressly stated otherwise, this specification (including adjoint power
Profit requires, summary and accompanying drawing) disclosed in each feature can be by providing the alternative features of identical, equivalent or similar purpose come generation
Replace.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included some features rather than further feature, but the combination of the feature of different embodiments means in this practicality newly
Within the scope of type and form different embodiments.For example, in the following claims, embodiment claimed
One of any mode can use in any combination.
All parts embodiment of the present utility model can be realized with hardware, or be transported on one or more processor
Capable software module is realized, or is realized with combinations thereof.It will be understood by those of skill in the art that it can make in practice
One in the client device according to the utility model embodiment is realized with microprocessor or digital signal processor (DSP)
The some or all functions of a little or whole parts.The utility model can be implemented for performing method as described herein
Some or all equipment or program of device (for example, computer program and computer program product).Such reality
Existing program of the present utility model can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from internet website and obtained, and either be provided or with any other shape on carrier signal
Formula provides.
The utility model is limited it should be noted that above-described embodiment illustrates rather than to the utility model,
And those skilled in the art can design alternative embodiment without departing from the scope of the appended claims.In right
In it is required that, any reference symbol between bracket should not be configured to limitations on claims.Word "comprising" is not arranged
Except element or step not listed in the claims being present.Word "a" or "an" before element does not exclude the presence of more
Individual such element.The utility model can be by means of including the hardware of some different elements and by means of properly programmed
Computer is realized.In if the unit claim of equipment for drying is listed, several in these devices can be by same
One hardware branch embodies.The use of word first, second, and third does not indicate that any order.Can be by these lists
Word is construed to title.
Claims (5)
- A kind of 1. Regional Rainfall uniformity measurement apparatus based on close-range photogrammetry principle, it is characterised in that described device bag Include：One word laser generator, high speed synchroniser, Digital Image Processor, two cameras and image rectification mark；The one word laser generator horizontal aligument region to be measured is set, the beam level that the word laser generator is sent Through region to be measured, two cameras are arranged on directly over the word laser generator, in the focusing of the camera The heart is the regional center to be measured；Described image calibration mark is arranged in the shooting visual field of the camera, and digitized map As record has the distance between each image rectification mark and position coordinates in processor；The high speed synchroniser is connected with the word laser generator and the camera respectively；The high speed synchroniser according to Prefixed time interval, control the word laser generator to send light beam, while control the camera to the region to be measured Image taking is carried out, the light beam that the word laser generator is sent exists respectively after the raindrop reflection in the region to be measured It is imaged in the image of two camera shootings；The camera shoots predetermined number group image, and the image that the Digital Image Processor is shot to the camera is carried out Analysis, obtains Regional Rainfall uniformity spatial distribution map.
- 2. device according to claim 1, it is characterised in that two cameras are with the word laser generator Axis is set for axisymmetrical.
- 3. device according to claim 1, it is characterised in that the light beam is feux rouges or green glow.
- 4. device according to claim 1, it is characterised in that the Digital Image Processor is shot to the camera Image carries out close-range photogrammetry analysis, obtains the space three-dimensional distribution map of raindrop illuminated by laser beam, is dropped with formation zone Rain uniformity spatial distribution map.
- 5. device according to claim 4, it is characterised in that the Digital Image Processor includes：Stereogram is extracted Unit, space image generation unit, plane interception unit, superpositing unit and spatial distribution map generation unit；Each stereogram that the stereogram extraction unit includes from the extraction of each image pair, each stereogram answer one Point position, two cameras are image pair in the image that synchronization is shot；The space image generation unit is directed to each stereogram, generates space image, obtains the three-dimensional image space of each image pair Distribution, wherein, each space image is then a hot spot；The plane interception unit is directed to each space image spatial distribution, interception space image distribution section；Whole space image sections of generation are superimposed by the superpositing unit, obtain identical region to be measured, same point position space image It is superimposed number；The space image superposition in identical region, same point position to be measured that the spatial distribution map generation unit obtains according to superposition Number, formation zone rainfall uniformity spatial distribution map.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772700A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN113703072A (en) * | 2021-09-17 | 2021-11-26 | 温州大学 | Real-time rainfall intensity detection device based on video |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772700A (en) * | 2017-02-21 | 2017-05-31 | 中国水利水电科学研究院 | A kind of Regional Rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN106772700B (en) * | 2017-02-21 | 2023-12-19 | 中国水利水电科学研究院 | Regional rainfall uniformity measuring system and method based on close-range photogrammetry principle |
| CN113703072A (en) * | 2021-09-17 | 2021-11-26 | 温州大学 | Real-time rainfall intensity detection device based on video |
| CN113703072B (en) * | 2021-09-17 | 2024-02-20 | 温州大学 | Real-time rainfall intensity detection device based on video |
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