CN107483878A - Coverage rate real-time measurement system and method based on video processing technique - Google Patents
Coverage rate real-time measurement system and method based on video processing technique Download PDFInfo
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- CN107483878A CN107483878A CN201610391596.1A CN201610391596A CN107483878A CN 107483878 A CN107483878 A CN 107483878A CN 201610391596 A CN201610391596 A CN 201610391596A CN 107483878 A CN107483878 A CN 107483878A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/8422—Investigating thin films, e.g. matrix isolation method
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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Abstract
The present invention relates to the coverage rate real-time measurement system based on video processing technique and method.The system includes：Multiple cameras, it is along the circumferential direction erected at the periphery of containment Test section, for shooting the moisture film covering part of the containment Test section periphery in the range of camera perspective；Many netting twines, every netting twine connect with corresponding camera；Optical cable, many netting twines are connected with the optical cable；And industrial computer, the industrial computer are connected with the optical cable, so that by the view data of camera shooting via netting twine, optical cable transmission to the industrial computer.The invention further relates to the method that the coverage rate based on video processing technique measures in real time.
Description
Technical field
The present invention relates to coverage rate real-time measurement system and method, in particular to coverage rate real-time measurement system and method based on video processing technique.
Background technology
The nuclear power of safety is a kind of clean energy resource of high energy source density, important to preserving the ecological environment, readjusting the energy structure and ensure that energy security plays the role of.But once safety problem occurs in nuclear power station, then huge harm can be brought to staff, nearby residents and ecological environment etc..It is that people apply the problem of necessary emphasis considers during nuclear power for this nuclear plant safety problem.Specifically, it is how to take away the heat caused by nuclear reactor when accident occurs.Passive nuclear power station due to accident occurs and it is fully powered-off in the case of, pass through the natural laws such as the gravity of material, free convection, evaporation, condensation, the cooling moisture film sprayed using the condensation effects and outside wall surface of steel containment vessel inwall is cooled and is depressured to containment, so as to take away the waste heat of reactor under accident condition.In the event that an accident occurs, the water dispenser at the top of containment can maintain at least 72 hours to form uniform moisture film on containment surface, ensure nuclear plant safety in the case where not needing any external power source and operations staff's intervention.
According to containment structure feature（Dome and cylinder）And moisture film heat-transfer character, moisture film coverage rate is high and uniformly is advantageous to take away the waste heat of nuclear reactor under accident condition.But reactor elevated tank finite capacity, it is necessary to set rational moisture film coverage rate, therefore moisture film coverage rate is one of key parameter related to containment general safety performance.The containment moisture film coverage rate of prior art is by the way of manual measurement, and survey tool is ruler.The defects of this method is that precision is low, it is impossible to On-line sampling system.
The content of the invention
The defects of in order to solve in the prior art, the present invention propose coverage rate real-time measurement system and method based on video processing technique.
According to a preferred embodiment of the invention, there is provided the system that a kind of coverage rate based on video processing technique measures in real time, it is characterised in that the system includes：Multiple cameras, it is along the circumferential direction erected at the periphery of containment Test section, for shooting the moisture film covering part of the containment Test section periphery in the range of camera perspective；Many netting twines, every netting twine connect with corresponding camera；Optical cable, many netting twines are connected with the optical cable；And industrial computer, the industrial computer are connected with the optical cable, so that by the view data of camera shooting via netting twine, optical cable transmission to the industrial computer.
According to a preferred embodiment of the invention, the camera arrangement is along the circumferential direction erected at two opening positions of containment Test section direct tube section upper and lower part periphery.
According to a preferred embodiment of the invention, the surface of all camera sync pulse jamming containment Test sections is controlled to cool down the form photo of moisture film by outer synchronous signal.
According to a preferred embodiment of the invention, an opening position sets a circle camera outside containment Test section, and another position sets a circle platform camera outside containment Test section, and wherein camera is the network interface industrial camera using industrial lens
According to a preferred embodiment of the invention, the system that the coverage rate based on video processing technique measures in real time also includes shading facility, and so as to shield the ambient light of extraneous change, stable photoenvironment is established using LED light source.
According to a preferred embodiment of the invention, the system that the coverage rate based on video processing technique measures in real time also includes interchanger, and many netting twines pass through switch aggregation a to optical cable.
According to a preferred embodiment of the invention, there is provided a kind of method that coverage rate based on video processing technique measures in real time, the system that methods described is measured in real time using the coverage rate based on video processing technique of the present invention, and the described method comprises the following steps：Start system and enter init state, and be the system energization；Detect the communications status of the system；The instruction for starting measurement is received, after the instruction for starting measurement is received, coverage rate is carried out according to parameter set in advance and measured in real time；Image data acquiring is carried out by camera, the view data that camera gathers is carried out into analysis draws covering rate score, and the image and numerical value of shooting are shown in the interface of industrial computer；And preserve photo and coverage data.
According to a preferred embodiment of the invention, the view data that camera gathers is subjected to analysis and show that covering rate score also includes being calculated by the mathematical modeling built up in advance, so as to show that the moisture film on containment Test section surface covers rate score.
According to a preferred embodiment of the invention, the relative position also included according to each pixel in image is calculated by the mathematical modeling built up in advance, the area of plane is converted to by surface area by mathematical method.
Pass through provided description to will be apparent from seeing the more suitable application areas of the present invention.It should be appreciated that the description of this part and specific examples are merely to illustrate, it does not limit the scope of the invention.
Brief description of the drawings
Embodiments of the invention and other aspects are discussed in detail below in conjunction with accompanying drawing, in accompanying drawing：
Fig. 1 shows the real-time measurement system of the moisture film coverage rate outside monitoring containment Test section according to embodiments of the present invention.
Fig. 2 shows that camera according to another embodiment of the present invention surrounds the top view of containment Test section arrangement.
Fig. 3 shows the real-time measurement system of the moisture film coverage rate outside monitoring containment Test section according to another embodiment of the present invention.
Fig. 4 shows the method for real-time measurement of the moisture film coverage rate outside monitoring containment Test section according to embodiments of the present invention.
Fig. 5 shows the schematic top plan view that camera according to embodiments of the present invention is taken pictures.
Fig. 6 shows the schematic top plan view that camera according to embodiments of the present invention is taken pictures.
Reference numerals list
1. containment Test section,
2. camera,
3. netting twine,
4. optical fiber,
4. industrial computer.
Embodiment
Accompanying drawing and the optional embodiment of the present invention is following description described to instruct how those of ordinary skill in the art implement and reproduce the present invention.In order to instruct technical solution of the present invention, simplify or eliminate some conventional aspects.It should be understood by one skilled in the art that modification or replacement from these embodiments will be within the scope of the present invention.It should be understood by one skilled in the art that following characteristics can combine to form multiple modifications of the present invention in a variety of ways.Thus, the invention is not limited in following optional embodiments, and only limited by claim and their equivalent.
The purpose of liquid film coverage measure essentially consists in the coating ratio for obtaining containment experiment external surface cooling water, the ratio between the region of i.e. cooled water covering and housing total surface area, according to the appropriate cooling water flow of the data setting,, can the unmanned intervention run time of 72 hours after maintenance accident so that cooling water tank at the top of prototype power plant safety shell is in the case where no external source supplements.
Fig. 1 shows the coverage rate real-time measurement system based on video processing technique of the moisture film coverage rate outside monitoring containment Test section.As shown in figure 1, showing reference 1 greatly refers to containment Test section.Coverage measure system based on video processing technique includes multiple cameras 2, many netting twines 3, optical cable 4 and industrial computer 5.
Camera 2 can be network interface industrial camera, and it is along the circumferential direction erected at the periphery of containment Test section 1, for shooting the corresponding moisture film covering part of the periphery of camera perspective scope inner containment Test section 1.It is specific as shown in Figure 2, it illustrates the camera that camera surrounds the arrangement of containment Test section 1, Fig. 2 shows the arrangement of camera in top plan view, and plurality of camera 2 is enough the moisture film covering situation of the various pieces for the whole periphery for photographing containment Test section 1.Each camera 2 is communicated by corresponding netting twine 3 and optical cable 4 with industrial computer 5, so as to send the corresponding moisture film covering part of the camera perspective scope inner containment Test section periphery of shooting to industrial computer 5, the image that industrial computer 5 collects to each camera 2 carries out analyzing the moisture film coverage rate drawn outside containment Test section.
In a preferred embodiment of the invention, the transmission means of view data can use many netting twines to connect an optical cable, such as shown in Fig. 1, each camera 2 has a corresponding netting twine 3, i.e. netting twine quantity is identical with camera quantity.Many netting twines 3 converge to an optical cable 4, and optical cable 4 is connected and communicated with industrial computer 5, such as shown in Fig. 3, and many netting twines 3 can pass through the switch aggregation of cabinet room a to optical cable 4.Can also be by the way of many netting twines connect more optical cables simultaneously.In a preferred embodiment of the invention, industrial computer 5 is computer.
In a preferred embodiment of the invention, the moisture film image transmitting of industrial camera shooting is to after industrial computer, image is read according to frequency is calculated by software, the black white image of captured moisture film photo is obtained after image enhaucament, Kalman filtering, binaryzation, wherein black portions are the part of moisture film covering, white is without water section, and by counter, calculating the number of black portions pixel can obtain by the area of moisture film covering part.
Camera arrangement is along the circumferential direction erected on position different at the two of the periphery of containment Test section 1, so as to measure the cooling water coverage rate of the two positions in real time.Specifically as shown in figure 3, in the position 1 of containment Test section and the circle cameras of the installation of position 2 two, the housing of every camera shooting equal area size, wherein camera can use network interface industrial camera.
All camera sync pulse jammings can be controlled by outer synchronous signal, ensure to obtain the moisture film data of synchronization.In embodiment as described above, system can have the common 20-40 platforms camera of two circles while shoot when working, and data transfer is in pulse condition（It is big that shooting terminates instantaneous data amount）, data transmission channel load may be unbalanced, and testing ground apart from industrial computer distance more than 100 meters, therefore in order to ensure that frame losing phenomenon will not occur for data transmission procedure, netted using kilomega network office and coordinate optical fiber transmission camera data（Because single network cable transmission can produce signal attenuation phenomenon）.
According to the design of horse structure, distorted to ensure to shoot area and reducing, and requirement of the experiment shell arcuate surface to the shooting depth of field, the selection to camera lens has certain limitation, such as the system can use industrial lens.Whole housing can be covered in order to shoot area simultaneously, the reference object of adjacent cameras there will be lap, and system records the overlapping area of every camera by the demarcation during field adjustable, and corresponding processing is done when handling picture data.
Because surface of shell is circular arc, its surface area, which is projected on photographic plane, has certain distortion, so in a preferred embodiment of the invention, the relative position of each pixel in photo need to be considered in algorithm processed, the area of plane is converted to by surface area by mathematical method, it is hereby achieved that more accurately coverage data.Further, since being related to area conversion, in a preferred embodiment of the invention, camera installation needs are accurately positioned, and ensure that every camera is identical with the relative position of housing, otherwise can be caused the deviation of reference area and be caused measurement inaccurate.
Picture data sends the industrial computer in control room to by optical fiber；The shooting image passed back using software to camera carries out Treatment Analysis, is calculated by the mathematical modeling built up in advance, show that current time surface of shell moisture film covers rate score, and preserve photo and measurement data in real time.
Fig. 4 shows the flow chart of the coverage rate method for real-time measurement based on video processing technique of the present invention.Upon start, system starts and enters init state, the parameter for needing to initialize mainly has the air line distance d between camera lens and housing, camera lens and distance d1, d2 of captured scope left and right edges, these parameters are used for the relative position for determining camera and coverage, and then the area of cameras line is determined, the real area that every pixel represents is finally given, as shown in Figure 4.Specifically, because housing is cambered surface, and photo is plane, and because the height of coverage is fixed, therefore shooting area is only relevant with arc length, can use the area of the length representative of the straight line line correspondences.As seen in figs. 5-6, camera represents area corresponding to straight line AB in O points, the photo of shooting, such as what is needed can be area corresponding to camber line AB, so seeking arc length corresponding to straight line AB by mathematical formulae with the coordinate of each pixel.And the device powers such as camera, the equipment communication state such as various parameters, simultaneity factor detection camera, trigger module is inputted in the software for calculation of industrial computer, wherein whether detection camera is fully open, proceed to next step if result is to be, if result detects again otherwise to return.Confirm normal rear wait operational order.The instruction for whether starting measurement is received, proceeds to next step if result is to be, if result is otherwise to continue waiting for instructing.When starting measurement, the parameter that system inputs according to step before, proceeds by coverage rate and measures in real time, and image data acquiring is carried out by equipment such as cameras, the picture data that camera gathers is subjected to analysis and draws covering rate score, the image and numerical value of shooting are shown in the interface of industrial computer.Preserve photo and coverage data, process terminate.
The present invention can adjust the flow of cooling water according to coverage rate.Identical cooling water flow is different in the coverage rate of surface of shell when housing is in different temperatures（Such as the evaporation capacity of housing cooling water when close to 80 degree is very big, the evaporation capacity very little at 20 degree）.The present invention realizes a certain flow in the case where cooling water inventory is fixed, determining cooling water, and cooling water no matter can be made to ensure the passive cooling effect of 72 hours under which kind of case temperature.
By the coverage rate real-time measurement system and method based on video processing technique of the present invention, advantages below is realized：
Measurement in real time.Data are transmitted using optical fiber, ensure that the stability and rapidity of network when moment largely transmits data, so as to reach the purpose measured in real time, takes pictures, store, calculating the frequency being fully completed and reach 10 times/second.
The precision of measurement greatly improves, and by using the processing computational methods, can be controlled for the error rate of containment liquid film coverage rate within 2%, precision is exceeded well over by way of taking pictures and adding hand dipping.
With good repeatability, the overall process of experiment is all recorded by image capturing system, can be with the test situation of each period in food preservation test.
Calculating process sequencing, compared with manual measurement mode, the deviation of measurement result caused by reducing human factor, it ensure that the objectivity of test data.
This programme figure is divided into IMAQ and calculates two steps with data, and liquid film coverage rate is calculated using machine vision, and the degree of accuracy that liquid film calculates can be improved constantly by technologies such as artificial intelligence, machine learning, meets the measurement demand of different tests or engineering project.
The present invention has been described in detail with reference to particular embodiments above, it is clear that in the case where not departing from the scope of the invention defined in appended claims, can be modified and change.More specifically, although some aspects of the present invention are identified herein as preferable or favourable, but the present invention should not necessarily be limited by these preferred embodiments of the present invention.
Claims (10)
1. the system that a kind of coverage rate based on video processing technique measures in real time, it is characterised in that the system includes：
Multiple cameras, it is along the circumferential direction erected at the periphery of containment Test section, for shooting the moisture film covering part of the containment Test section periphery in the range of camera perspective；
Many netting twines, every netting twine connect with corresponding camera；
Optical cable, many netting twines are connected with the optical cable；And
Industrial computer, the industrial computer are connected with the optical cable, so that by the view data of camera shooting via netting twine, optical cable transmission to the industrial computer.
2. system according to claim 1, it is characterised in that all camera sync pulse jammings are controlled by outer synchronous signal, the camera synchronously shoots the form photo of the surface cooling moisture film of containment Test section.
3. system according to claim 1 a, it is characterised in that opening position sets a circle camera outside containment Test section, and different another positions outside containment Test section sets another circle platform camera.
4. system according to claim 1, it is characterised in that the installation site of camera is fixed at containment Test section 0.5-1.5 rice, and wherein camera is the network interface industrial camera using industrial lens.
5. system according to claim 1, it is characterised in that it also includes shading facility, and so as to shield the ambient light of extraneous change, stable photoenvironment is established using LED light source.
6. system according to claim 1, it is characterised in that it also includes interchanger, and many netting twines pass through switch aggregation a to optical cable.
7. a kind of method that coverage rate based on video processing technique measures in real time, it is characterised in that methods described the described method comprises the following steps using the system according to any one of claim 1-6：
Start system and enter init state, and be the system energization；
Detect the communications status of the system；
The instruction for starting measurement is received, after the instruction for starting measurement is received, coverage rate is carried out according to parameter set in advance and measured in real time；
Image data acquiring is carried out by camera, the view data that camera gathers is carried out into analysis draws covering rate score, and the image and numerical value of shooting are shown in the interface of industrial computer；And
Preserve photo and coverage data.
8. according to the method for claim 7, it is characterised in that the view data that camera gathers is subjected to analysis and show that covering rate score also includes being calculated by the mathematical modeling built up in advance, so as to show that the moisture film on containment Test section surface covers rate score.
9. according to the method for claim 7, it is characterised in that the relative position also included according to each pixel in image is calculated by the mathematical modeling built up in advance, the area of plane is converted to by surface area by mathematical method.
10. according to the method for claim 7, it is characterized in that, the moisture film image transmitting of industrial camera shooting is to after industrial computer, image is read according to frequency is calculated by software, the black white image of captured moisture film photo is obtained after image enhaucament, Kalman filtering, binaryzation, wherein black portions are the part of moisture film covering, and white is without water section, by counter, calculating the number of black portions pixel can obtain by the area of moisture film covering part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210025635.1A CN114199874A (en) | 2016-06-06 | 2016-06-06 | Real-time coverage rate measuring system and method based on video processing technology |
| CN201610391596.1A CN107483878A (en) | 2016-06-06 | 2016-06-06 | Coverage rate real-time measurement system and method based on video processing technique |
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| CN201610391596.1A CN107483878A (en) | 2016-06-06 | 2016-06-06 | Coverage rate real-time measurement system and method based on video processing technique |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112017798A (en) * | 2020-09-03 | 2020-12-01 | 三门核电有限公司 | Improved containment outer surface water film coverage rate inspection system and method |
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| JPS6093384A (en) * | 1983-10-28 | 1985-05-25 | 株式会社日立製作所 | Nuclear reactor water-level instrumentation nozzle |
| CN105185420A (en) * | 2015-05-26 | 2015-12-23 | 中国科学技术大学 | Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface |
| CN205069138U (en) * | 2015-05-26 | 2016-03-02 | 中国科学技术大学 | Cooling water film coverage rate automatic checkout device on nuclear power station containment surface |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204029400U (en) * | 2014-08-19 | 2014-12-17 | 国核华清（北京）核电技术研发中心有限公司 | Circuit system and comprise that its nuclear reactor safety shell moisture joins test unit |
| CN204117608U (en) * | 2014-08-19 | 2015-01-21 | 国核华清（北京）核电技术研发中心有限公司 | Nuclear reactor safety shell moisture joins test unit |
| JP2016075540A (en) * | 2014-10-03 | 2016-05-12 | 株式会社東芝 | Water film inspection device and water film inspection method |
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2016
- 2016-06-06 CN CN201610391596.1A patent/CN107483878A/en active Pending
- 2016-06-06 CN CN202210025635.1A patent/CN114199874A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093384A (en) * | 1983-10-28 | 1985-05-25 | 株式会社日立製作所 | Nuclear reactor water-level instrumentation nozzle |
| CN105185420A (en) * | 2015-05-26 | 2015-12-23 | 中国科学技术大学 | Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface |
| CN205069138U (en) * | 2015-05-26 | 2016-03-02 | 中国科学技术大学 | Cooling water film coverage rate automatic checkout device on nuclear power station containment surface |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112017798A (en) * | 2020-09-03 | 2020-12-01 | 三门核电有限公司 | Improved containment outer surface water film coverage rate inspection system and method |
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| CN114199874A (en) | 2022-03-18 |
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Application publication date: 20171215 |