CN105185420A - Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface - Google Patents
Automatic detection device and method for cooling water film coverage on nuclear power plant containment surface Download PDFInfo
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- CN105185420A CN105185420A CN201510274211.9A CN201510274211A CN105185420A CN 105185420 A CN105185420 A CN 105185420A CN 201510274211 A CN201510274211 A CN 201510274211A CN 105185420 A CN105185420 A CN 105185420A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The present invention discloses an automatic detection device and method for cooling water film coverage on nuclear power plant containment surface. The device comprises a plurality of image acquisition systems, synchronous triggers are connected between the plurality of image acquisition systems; the image acquisition systems are connected to a computer via the network data lines; and the computer is provided with an image processing system. The entire nuclear power plant containment test area is divided into several regions; the images of each test region are acquired by one image acquisition system; the plurality of image acquisition systems synchronously directly output the digital image signals transmitted by a visual sensor to the computer for storage on a real-time basis; and an image processing system conducts algorithm processing on the images obtained by the image acquisition systems, calculates and outputs the final result (water film coverage). The device and method can be applied to the measurement of cooling water film coverage on nuclear power plant containment surface, and have the advantages of high precision, non-contact characteristics, easy control, high speed, large space and high precision.
Description
Technical field
The present invention relates to a kind of Automatic Measurement Technique being applied to the moisture film coverage rate that nuclear plant safety shell wall is formed, particularly relate to a kind of cooling moisture film coverage rate automatic detection device and method of nuclear power plant containment shell surface.
Background technology
The cooling system on containment surface is the critical component ensureing that nuclear plant safety runs, and Fukushima, Japan nuclear power leakage event quits work because the cooling system on containment surface is destroyed and causes.In nuclear power station operational process, can the moisture film coverage rate that detection chilled water be needed to be formed on safe shell wall reach requirement.In operational process, the moisture film coverage data that effective means record is fully complete need be taked, to guarantee containment having enough chilled waters, to ensure the safe operation of nuclear power station.
Summary of the invention
The object of this invention is to provide a kind of cooling moisture film coverage rate automatic detection device and method of nuclear power plant containment shell surface.
The object of the invention is to be achieved through the following technical solutions:
The cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface of the present invention, comprise and overlap image capturing system more, synchronizer trigger is connected with between many covers image capturing system, described image capturing system is connected with computing machine by network data line, and described computing machine is provided with image processing system.
The method that the cooling moisture film coverage rate that the cooling moisture film coverage rate automatic detection device on above-mentioned nuclear power plant containment shell surface of the present invention realizes nuclear power plant containment shell surface detects automatically, tested for whole nuclear power plant containment shell region is divided into some regions, the image in each tested region is obtained by a set of image capturing system respectively, often overlaps the view data that image capturing system records corresponding region respectively;
The view data in the multiple region of many covers image capturing system synchronous acquisition sends computing machine to and stores, and carries out algorithm process by image processing system to view data, calculates and exports final result;
Described image processing system detects based on motion and the detection algorithm of combining image segmentation, calculate the coverage rate of single region cooling moisture film respectively, then to synthesize position is final overall coverage rate.
As seen from the above technical solution provided by the invention, the cooling moisture film coverage rate automatic detection device on the nuclear power plant containment shell surface that the embodiment of the present invention provides and method, due to tested for whole nuclear power plant containment shell region is divided into some regions, the image in each tested region is obtained by a set of image capturing system respectively, and the data image signal that vision sensor exports synchronously, is in real time directly sent to computing machine and stores by multiple image capturing system; Image processing system carries out algorithm process to the image that image capturing system obtains, calculate and export final result (moisture film coverage rate), can be applicable to the measurement of the cooling moisture film coverage rate on nuclear power plant containment shell surface, there is high precision, noncontact characteristic.The present invention controls conveniently, measuring speed is fast, space is large, precision is high, has broad application prospects, and industrially has potential using value.
Accompanying drawing explanation
The structured flowchart of the cooling moisture film coverage rate automatic detection device on the nuclear power plant containment shell surface that Fig. 1 provides for the embodiment of the present invention.
The application state schematic diagram of the cooling moisture film coverage rate automatic detection device on the nuclear power plant containment shell surface that Fig. 2 provides for the embodiment of the present invention.
The flow process signal of the cooling moisture film coverage rate automatic testing method on the nuclear power plant containment shell surface that Fig. 3 provides for the embodiment of the present invention.
In figure:
1, moisture film is cooled, 2, industrial tight shot, 3, area array CCD camera, 4, adjustable support, 5, network data line, 6, computing machine, 7, synchronizer trigger.
Embodiment
To be described in further detail the embodiment of the present invention below.
The cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface of the present invention, its preferably embodiment be:
Comprise and overlap image capturing system more, be connected with synchronizer trigger between many cover image capturing systems, described image capturing system is connected with computing machine by network data line, and described computing machine is provided with image processing system.
Described image capturing system is provided with vision sensor, and described vision sensor comprises digital camera, and described digital camera is arranged on adjustable support, and described digital camera is provided with industrial tight shot.
Described digital camera is area array CCD camera;
Many covers image capturing system connects a computing machine jointly, or often cover image capturing system connects separately a computing machine.
Described image processing system is integrated in described computing machine or is located at the data processing centre (DPC) of long-range connection.
Described synchronizer trigger is the synchronous triggering device arranged separately or the synchronous trigger module be integrated in described computing machine.
The method that the cooling moisture film coverage rate that the cooling moisture film coverage rate automatic detection device on above-mentioned nuclear power plant containment shell surface of the present invention realizes nuclear power plant containment shell surface detects automatically, its preferably embodiment be:
Tested for whole nuclear power plant containment shell region is divided into some regions, and the image in each tested region is obtained by a set of image capturing system respectively, often overlaps the view data that image capturing system records corresponding region respectively;
The view data in the multiple region of many covers image capturing system synchronous acquisition sends computing machine to and stores, and carries out algorithm process by image processing system to view data, calculates and exports final result;
Described image processing system detects based on motion and the detection algorithm of combining image segmentation, calculate the coverage rate of single region cooling moisture film respectively, then to synthesize position is final overall coverage rate.
Described image processing system carries out algorithm process and comprises step:
First, making image intercepts template, for every two field picture, intercepts effective image area, removes extraneous background and support facility shield portions, carry out image median filter simultaneously, remove noise;
The first two field picture P1 when at every turn taking is used as background image, utilizes motion detection background to reduce principle, subtract each other with the first two field picture P1 and current frame image Pi and obtain error image Pdi;
Then, carry out image binaryzation process, according to the histogram of error image Pdi, and the spuious point removed by medium filtering in described histogram, represent there being the region of cooling moisture film in described histogram with 1, the region of no-cooling-water film represents with 0, by the coverage rate of areal calculation moisture film having chilled water diaphragm area.
The cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface of the present invention and method, tested for whole nuclear power plant containment shell region is divided into some regions, utilize multiple vision sensor to take containment surface image in real time, image capturing system directly sends the data image signal that vision sensor exports to computing machine in real time and stores; Image processing system carries out algorithm process to the image that image capturing system obtains, calculate and export final result (moisture film coverage rate), can be applicable to the measurement of the cooling moisture film coverage rate on nuclear power plant containment shell surface, there is high precision, noncontact characteristic.The present invention controls conveniently, measuring speed is fast, space is large, precision is high, has broad application prospects, and industrially has potential using value.
Specific embodiment:
As shown in Figure 1, pick-up unit mainly comprises image capturing system, computing machine and image processing system, image capturing system is provided with vision sensor, vision sensor adopts digital camera, and image capturing system directly sends the data image signal that digital camera exports to computing machine in real time and stores; Image processing system carries out algorithm process to the image that image capturing system obtains, and calculates and exports final result (moisture film coverage rate).Image processing system can be integrated among this computing machine or be connected to remote processing center.
As shown in Figure 2, be the model schematic carrying out cooling moisture film coverage rate automatic detection device.Because the effective coverage on nuclear power plant containment shell surface is larger, the annular outer cover feature of containment, single camera cannot obtain the moisture film information on containment in the tested region of whole containment, so pick-up unit is divided into some regions tested for whole containment region.The image in each tested region is obtained by a set of image capturing system, often overlaps the view data that image capturing system records corresponding region respectively.The vision sensor (digital camera) often overlapping image capturing system comprises an industrial lens, a camera and installs the support of camera.
Owing to entire system being divided into some regions, taking simultaneously, the synchronism of camera shooting is particularly important.The image acquisition of every platform camera can respectively by a computing machine complete independently, also can the image acquisition of multiple stage camera have been unified by the computing machine that performance is higher, for ensureing the synchronism of the view data of collected by camera, synchronizer trigger is adopted to carry out synchronous data collection.Each camera calibration is tested region separately, obtain the chilled water film image on tested area image containment respectively, calculate the coverage rate of single region cooling moisture film respectively, then to synthesize position is final overall coverage rate.
The features such as the impact that the detection of cooling moisture film has cooling moisture film form and distribution situation is complicated and changeable, be vulnerable to illumination and image brightness uniformity, picture size is large and quantity is many, cooling moisture film information is relatively weak.According to these features, devise a set of detection based on motion and the detection algorithm of combining image segmentation, image processing system processes image according to this algorithm.
As shown in Figure 3, the main flow of algorithm is described below:
Making image intercepts template.For every two field picture, intercept effective image area, remove the facility such as extraneous background and support shield portions;
Image median filter, removes noise;
The first two field picture P1 when at every turn taking is used as background image, utilizes motion detection background to reduce principle, subtract each other with the first two field picture P1 and current frame image Pi and obtain error image Pdi;
Image binaryzation.According to the histogram of error image Pdi, the image Presult that binaryzation is later, have the region of cooling moisture film to represent (white portion) with 1, the region of no-cooling-water film represents with 0 (black region);
Medium filtering removes the spuious point in binary image;
By the coverage rate of areal calculation moisture film having chilled water diaphragm area.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (8)
1. the cooling moisture film coverage rate automatic detection device on a nuclear power plant containment shell surface, it is characterized in that, comprise and overlap image capturing system more, synchronizer trigger is connected with between many covers image capturing system, described image capturing system is connected with computing machine by network data line, and described computing machine is provided with image processing system.
2. the cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface according to claim 1 and method, it is characterized in that, described image capturing system is provided with vision sensor, described vision sensor comprises digital camera, described digital camera is arranged on adjustable support, and described digital camera is provided with industrial tight shot.
3. the cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface according to claim 2, it is characterized in that, described digital camera is area array CCD camera.
4. the cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface according to claim 3, is characterized in that, many cover image capturing systems connect a computing machine jointly, or often cover image capturing system connects separately a computing machine.
5. the cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface according to claim 4, is characterized in that, described image processing system is integrated in described computing machine or is located at the data processing centre (DPC) of long-range connection.
6. the cooling moisture film coverage rate automatic detection device on nuclear power plant containment shell surface according to claim 7, is characterized in that, described synchronizer trigger is the synchronous triggering device arranged separately or the synchronous trigger module be integrated in described computing machine.
7. the method that the cooling moisture film coverage rate that the cooling moisture film coverage rate automatic detection device on the nuclear power plant containment shell surface described in an any one of claim 1 to 6 realizes nuclear power plant containment shell surface detects automatically, it is characterized in that, tested for whole nuclear power plant containment shell region is divided into some regions, the image in each tested region is obtained by a set of image capturing system respectively, often overlaps the view data that image capturing system records corresponding region respectively;
The view data in the multiple region of many covers image capturing system synchronous acquisition sends computing machine to and stores, and carries out algorithm process by image processing system to view data, calculates and exports final result;
Described image processing system detects based on motion and the detection algorithm of combining image segmentation, calculate the coverage rate of single region cooling moisture film respectively, then to synthesize position is final overall coverage rate.
8. the method that automatically detects of the cooling moisture film coverage rate on nuclear power plant containment shell surface according to claim 7, it is characterized in that, described image processing system carries out algorithm process and comprises step:
First, making image intercepts template, for every two field picture, intercepts effective image area, removes extraneous background and support facility shield portions, carry out image median filter simultaneously, remove noise;
The first two field picture P1 when at every turn taking is used as background image, utilizes motion detection background to reduce principle, subtract each other with the first two field picture P1 and current frame image Pi and obtain error image Pdi;
Then, carry out image binaryzation process, according to the histogram of error image Pdi, and the spuious point removed by medium filtering in described histogram, represent there being the region of cooling moisture film in described histogram with 1, the region of no-cooling-water film represents with 0, by the coverage rate of areal calculation moisture film having chilled water diaphragm area.
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| CN105869687A (en) * | 2016-03-24 | 2016-08-17 | 国核工程有限公司 | Measuring method and measuring system for water film coverage rate of steel containment vessel |
| CN107483878A (en) * | 2016-06-06 | 2017-12-15 | 国核华清（北京）核电技术研发中心有限公司 | Coverage rate real-time measurement system and method based on video processing technique |
| CN111830240A (en) * | 2020-07-30 | 2020-10-27 | 中南大学 | Loading control and data synchronous monitoring device of true triaxial multi-field coupling and power disturbance platform |
| CN112730422A (en) * | 2020-12-01 | 2021-04-30 | 中广核工程有限公司 | Nuclear power station containment vessel defect detection method and system |
| CN116012386A (en) * | 2023-03-28 | 2023-04-25 | 超音速人工智能科技股份有限公司 | Diaphragm coverage detection method, system, equipment and storage medium |
| CN116631660A (en) * | 2022-10-18 | 2023-08-22 | 国家电投集团科学技术研究院有限公司 | Control method, system and equipment for passive containment water distribution device |
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| CN112730422A (en) * | 2020-12-01 | 2021-04-30 | 中广核工程有限公司 | Nuclear power station containment vessel defect detection method and system |
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| CN116012386A (en) * | 2023-03-28 | 2023-04-25 | 超音速人工智能科技股份有限公司 | Diaphragm coverage detection method, system, equipment and storage medium |
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