CN102955041B - Method for measuring speed of rod dropping process of control rod drive wire - Google Patents
Method for measuring speed of rod dropping process of control rod drive wire Download PDFInfo
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- CN102955041B CN102955041B CN201110241238.XA CN201110241238A CN102955041B CN 102955041 B CN102955041 B CN 102955041B CN 201110241238 A CN201110241238 A CN 201110241238A CN 102955041 B CN102955041 B CN 102955041B
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- control rod
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 238000000691 measurement method Methods 0.000 claims description 8
- 241000669003 Aspidiotus destructor Species 0.000 claims description 6
- 241000669326 Selenaspidus articulatus Species 0.000 claims description 3
- 230000001186 cumulative effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000013017 mechanical damping Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 241000669072 Chrysomphalus dictyospermi Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
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- 230000009257 reactivity Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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Abstract
The invention relates to a method for measuring speed of rod dropping process of a control rod drive wire. The method sequentially includes 1, performing scale marking to a drive shaft; 2, shooting rod dropping process of the drive shaft by video; 3, pre-treating video images, and acquiring a gray value Y of each Pixel point in a single-frame image; 4, acquiring an average value Y~ of the gray values of the Pixel points in the single-frame image, performing gray value accumulation along an x direction to acquire Yj, and acquiring the gray value Y'=(Yj-Y~)<2> of each line after treatment; and 5, acquiring a filtered speed curve. The method for measuring speed of rod dropping process of the control rod drive wire is non-contact measurement without influence operation of flow field and the drive line, and the structure of the drive line is free of damage. The method is convenient to operate and high in portability. Measured rod dropping process is intuitive, rich in measuring parameters and high in measuring precision. The method is high in treating efficiency, treating a rod dropping performance curve and reading rod dropping parameters are achieved automatically and quickly, and immediate evaluation of rod dropping performance of the drive line in the measuring field is achieved.
Description
Technical field
The present invention relates to a kind of Control rod drive line scram process speed measurement method, particularly relate to a kind of for driven the Control rod drive line scram process speed measurement method of the out-pile test and evaluation of the drive wire of control rod assembly motion by driving shaft.
Background technology
Control rod drive line is the topworks of reactor control and protection system; its major function is to drive control rod assembly to move up and down at heap in-core; realize control to pile reactivity, realize emergency shut-down under accident condition etc., most important in reactor system.For kinetic characteristic and the scram behavior of overall understanding Control rod drive line, must carry out Control rod drive line cold conditions scram evaluating characteristics, guarantee that its Drop performance parameter meets device service requirement, and provide foundation for Control rod drive line Design and optimization and sizing.In the face of a large amount of content measurements, the measuring accuracy of special object require and Real-Time Evaluation demand, technology in the past all can not meet, and therefore needs the new measuring method of development badly.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of simple operation, process Control rod drive line scram process speed measurement method intuitively.
For solving the problems of the technologies described above, a kind of Control rod drive line scram of the present invention process speed measurement method, comprises the following steps successively:
1, driving shaft is carried out to scale mark, comprising:
A. scale mark vertically distribution length be greater than scram stroke;
B. scale mark parameter area: 0.1mm≤dark H≤0.2mm, 0.1mm≤wide B≤0.2mm, 6mm≤length L≤15mm;
C. scale mark is evenly arranged along axial length, and scale mark adjacent spaces D is 5～10mm;
2, driving shaft scram process video is taken, and comprises successively:
A. video capture equipment: taking frame per second is video capture equipment more than frame p.s.s 2000;
B. equipment debugging: have two to three full scale lines in image window;
C. driving shaft scram process video is taken, is preserved;
3, video image pre-service:
A. video decomposes: video is decomposed into single-frame images;
B. intercept one by one single-frame images processing window, establishing x direction is scale mark direction, and y direction is axially, intercepts x direction and contains whole piece scale mark region, intercepts the containing of y direction and contains two scale mark overlay areas; Obtain three kinds of monochromatic intensity level R, G, B of each pixel;
C. obtain the gray-scale value Y of each pixel in single-frame images,
Y＝0.299R+0.587G+0.114B；
4, scale mark extracts:
Obtain the gray-scale value average of each pixel in single-frame images
the gray-scale value of each pixel is carried out to the cumulative Y that obtains of gray-scale value according to x direction
j, obtain each row gray-scale value after treatment
5, curve processing, comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in former frame image
1, the number of pixels y of y direction in a rear two field picture
1', wherein number of pixels from top to bottom reduces gradually in y direction;
B. obtain this moment of driving shaft speed V;
C. obtain rate curve, control rod assembly is fallen to the rate curve of other parts beyond the rate curve after mechanical damping spring and carry out filtering, obtain filtered rate curve;
6, choose the rate curve being obtained by the single-frame images that meets following standard simultaneously:
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed increases continuously;
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed is for just;
In continuous 30～50 single-frame imagess, driving shaft filter velocity of wave front is that negative single-frame images number is less than 3 frames.
Dark H=0.15mm, wide B=0.15mm, length L=10mm, scale mark adjacent spaces D=10mm.
Scale mark color is yellow.
In the b of step 4, for same scale mark, work as y
1> y
1', this moment of driving shaft speed V=(y
1-y
1') × D × shooting frame per second/y
0; Work as y
1< y
1', this moment of driving shaft speed V=(y
1-y
1'+y
0) × D × shooting frame per second/y
0.
The present invention is non-contact measurement, can not affect flow field and drive wire operation, also can not cause damage to drive wire structure.
Simple operation of the present invention, portable strong, can be widely used in the out-pile test and evaluation that is driven the drive wire of control rod assembly motion by driving shaft.
The scram process that the present invention records is directly perceived, and test parameter is abundant, and measuring accuracy is higher.
Treatment effeciency of the present invention is high, automatically completes fast the processing of Drop performance curve and reading of scram parameter, realizes test site drive wire Drop performance instant evaluation, carries out fast Drop performance analysis.
Embodiment
The present invention comprises the following steps successively:
1, driving shaft is carried out to scale mark, comprising:
A. scale mark distribution length vertically: be greater than scram stroke;
B. scale mark parameter area: 0.1mm≤dark H≤0.2mm, 0.1mm≤wide B≤0.2mm, 6mm≤length L≤15mm; Be preferably dark H=0.15mm, wide B=0.15mm, length L=10mm;
C. scale mark is evenly arranged along axial length, and scale mark adjacent spaces D is 5～10mm; Preferably D=10mm;
D. scale mark color: scale mark color is the color strong with driving shaft color contrast, is preferably yellow;
2, driving shaft scram process video is taken, and comprises successively:
A. video capture equipment: taking frame per second is video capture equipment more than frame p.s.s 2000; Be preferably phantom digital imaging system series v9 version high-speed camera instrument;
B. equipment debugging: have two to three full scale lines in image window;
C. driving shaft scram process video is taken, is preserved;
3, video image pre-service:
A. video decomposes: video is decomposed into single-frame images;
B. intercept one by one single-frame images processing window, establishing x direction is scale mark direction, and y direction is axially, intercepts x direction and contains whole piece scale mark region, intercepts the containing of y direction and contains two scale mark overlay areas; Obtain three kinds of monochromatic intensity level R, G, B of each pixel;
C. obtain the gray-scale value Y of each pixel in single-frame images,
Y＝0.299R+0.587G+0.114B；
4, scale mark extracts:
Obtain the gray-scale value average of each pixel in single-frame images
the gray-scale value of each pixel is carried out to the cumulative Y that obtains of gray-scale value according to x direction
j, obtain each row gray-scale value after treatment
5, curve processing, comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in former frame image
1, the number of pixels y of y direction in a rear two field picture
1', wherein number of pixels from top to bottom reduces gradually in y direction;
B. obtain this moment of driving shaft speed V:
For same scale mark, work as y
1> y
1', this moment of driving shaft speed V=(y
1-y
1') × D × shooting frame per second/y
0;
Work as y
1< y
1', when same scale mark is positioned at image processing window bottom in former frame image, be positioned at image processing window top in next frame image time, this moment of driving shaft speed V=(y
1-y
1'+y
0) × D × shooting frame per second/y
0;
C. obtain rate curve, and rate curve is carried out to filtering obtain filtered rate curve, filtered rate curve is carried out to integration and obtain displacement curve, filtered rate curve differentiate is obtained to accelerating curve; The rate curve that wherein control rod assembly is fallen after mechanical damping spring keeps original processing costs, does not do filtering processing;
6, choose the rate curve being obtained by the single-frame images that meets following standard simultaneously:
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed increases continuously;
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed is for just;
In continuous 30～50 single-frame imagess, driving shaft filter velocity of wave front is that negative single-frame images number is less than 3 frames.
In the present invention, driving shaft is threaded with the connection handle of control rod assembly, and when the motion of control rod assembly, driving shaft moves with it unanimously, and the driving shaft kinetic characteristic recording is the kinetic characteristic of control rod assembly.System obtains after driving shaft motion process video, the scale on driving shaft is extracted to its change in location and provide scram conditional curve and parameter.
Claims (3)
1. a Control rod drive line scram process speed measurement method, comprises the following steps successively:
1, driving shaft is carried out to scale mark, comprising:
A. scale mark vertically distribution length be greater than scram stroke;
B. scale mark parameter area: 0.1mm≤dark H≤0.2mm, 0.1mm≤wide B≤0.2mm, 6mm≤length L≤15mm;
C. scale mark is evenly arranged vertically, and scale mark adjacent spaces D is 5～10mm;
2, driving shaft scram process video is taken, and comprises successively:
A. video capture equipment: taking frame per second is video capture equipment more than frame p.s.s 2000:
B. equipment debugging: have two to three full scale in image window;
C. driving shaft scram process video is taken, is preserved;
3, video image pre-service:
A. video decomposes: video is decomposed into single-frame images;
B. intercept one by one single-frame images processing window, if x direction is scale mark direction, y direction is axially, intercepts x direction and contains whole piece scale mark region, intercepts the containing of y direction and contains two scale mark overlay areas: three kinds of monochromatic intensity level R, G, B that obtain each pixel;
C. obtain the gray-scale value Y of each pixel in single-frame images,
Y=0.299R+0.587G+0114B；
4, scale mark extracts;
Obtain the gray-scale value average of each pixel in single-frame images
, the gray-scale value of each pixel is carried out to the cumulative Y that obtains of gray-scale value according to x direction
j, obtain each row gray-scale value after treatment
5, curve processing, comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in former frame image
1, the number of pixels y of y direction in a rear two field picture
1ˊ, wherein number of pixels from top to bottom reduces gradually in y direction;
B. obtain this moment of driving shaft speed V;
C. obtain rate curve, control rod assembly is fallen to the rate curve of other parts beyond the rate curve after mechanical damping spring and carry out filtering, obtain filtered rate curve;
6, choose the rate curve being obtained by the single-frame images that meets following standard simultaneously;
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed increases continuously;
In continuous 5～6 single-frame imagess, after driving shaft filtering, speed is for just;
In continuous 30～50 single-frame imagess, driving shaft filter velocity of wave front is that negative single-frame images is less than 3 frames.
2. a kind of Control rod drive line scram process speed measurement method according to claim 1, is characterized in that: dark H=0.15mm, length L=10mm, scale mark adjacent spaces D=10mm.
3. a kind of Control rod drive line scram process speed measurement method according to claim 1, is characterized in that: scale mark color is for yellow.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241238.XA CN102955041B (en) | 2011-08-22 | 2011-08-22 | Method for measuring speed of rod dropping process of control rod drive wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110241238.XA CN102955041B (en) | 2011-08-22 | 2011-08-22 | Method for measuring speed of rod dropping process of control rod drive wire |
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| CN102955041A CN102955041A (en) | 2013-03-06 |
| CN102955041B true CN102955041B (en) | 2014-06-18 |
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| CN105701826B (en) * | 2016-01-15 | 2018-06-29 | 中国计量学院 | A kind of Aerospace Electric Connector separate picture intercept method |
| CN112599265B (en) * | 2020-12-05 | 2023-02-10 | 核电运行研究(上海)有限公司 | Control rod drop time measuring method integrated with rod position measuring equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452627A1 (en) * | 1990-03-19 | 1991-10-23 | Mitsubishi Denki Kabushiki Kaisha | Analysing process and filming device for fast phenomena |
| US5586063A (en) * | 1993-09-01 | 1996-12-17 | Hardin; Larry C. | Optical range and speed detection system |
| CN1987484A (en) * | 2005-12-20 | 2007-06-27 | 日产自动车株式会社 | Image velocity computer and method for computing image velocity |
| EP2133697A2 (en) * | 2008-06-10 | 2009-12-16 | Baumer Innotec AG | Device and method for recording speeds of a surface of an object |
-
2011
- 2011-08-22 CN CN201110241238.XA patent/CN102955041B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0452627A1 (en) * | 1990-03-19 | 1991-10-23 | Mitsubishi Denki Kabushiki Kaisha | Analysing process and filming device for fast phenomena |
| US5586063A (en) * | 1993-09-01 | 1996-12-17 | Hardin; Larry C. | Optical range and speed detection system |
| CN1987484A (en) * | 2005-12-20 | 2007-06-27 | 日产自动车株式会社 | Image velocity computer and method for computing image velocity |
| EP2133697A2 (en) * | 2008-06-10 | 2009-12-16 | Baumer Innotec AG | Device and method for recording speeds of a surface of an object |
Non-Patent Citations (2)
| Title |
|---|
| 何军山等.高速摄像仪在落棒试验中的应用及展望.《核动力工程》.2007,第28卷(第4期),125-127. |
| 高速摄像仪在落棒试验中的应用及展望;何军山等;《核动力工程》;20070831;第28卷(第4期);125-127 * |
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