CN102955041A - 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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- CN102955041A CN102955041A CN201110241238XA CN201110241238A CN102955041A CN 102955041 A CN102955041 A CN 102955041A CN 201110241238X A CN201110241238X A CN 201110241238XA CN 201110241238 A CN201110241238 A CN 201110241238A CN 102955041 A CN102955041 A CN 102955041A
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- scale mark
- driving shaft
- frame
- control rod
- speed
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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 firstly, performing scale marking to a drive shaft; secondly, shooting rod dropping process of the drive shaft by video; thirdly, pre-treating video images, and acquiring a gray value Y of each Pixel point in a single-frame image; fourthly, acquiring an average value 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 of each line after treatment; and fifthly, 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 Control rod drive line scram process speed measurement method of out-pile test and evaluation of the drive wire for driven the motion of control rod assembly by driving shaft.
Background technology
Control rod drive line is the topworks of reactor control and protection system; its major function is to drive the control rod assembly to move up and down in reactor core; realization is to the control of pile reactivity, realizes the emergency shut-down etc. under the accident condition, and is 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 satisfies the device service requirement, and provide foundation for Control rod drive line Design and optimization and typing.In the face of a large amount of content measurements, measuring accuracy requirement and the Real-Time Evaluation demand of special object, technology in the past all can not satisfy, and therefore needs the development Novel measuring method badly.
Summary of the invention
The technical problem to be solved in the present invention provides intuitively Control rod drive line scram process speed measurement method of a kind of simple operation, process.
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 may further comprise the steps successively:
1, driving shaft is carried out scale mark, comprising:
A. scale mark vertically distribution length greater than the 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 the above video capture equipment of frame p.s.s 2000;
B. equipment debugging: two to three full scale lines are arranged in the 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 the single-frame images processing window, establishing the x direction is the scale mark direction, and the y direction is axially, and intercepting x direction contains whole piece scale mark region, and intercepting y direction contains and contains two scale mark overlay areas; Obtain intensity level R, G, the B of three kinds of monochromes of each pixel;
C. obtain the gray-scale value Y of each pixel in the single-frame images,
Y＝0.299R+0.587G+0.114B；
4, scale mark extracts:
Obtain the gray-scale value average of each pixel in the single-frame images
The gray-scale value of each pixel is carried out the cumulative Y that obtains of gray-scale value according to the x direction
j, each the row gray-scale value after obtaining processing
5, curve processing comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in the former frame image
1, the number of pixels y of y direction in the rear two field picture
1', wherein number of pixels from top to bottom reduces gradually in the y direction;
B. obtain this moment of driving shaft speed V;
C. obtain rate curve, the control rod assembly is fallen the rate curve of other parts carries out filtering beyond the rate curve after the mechanical damping spring, obtain filtered rate curve;
6, choose the rate curve that is obtained by the single-frame images that satisfies simultaneously following standard:
In continuous 5～6 single-frame imagess, speed increases continuously after the driving shaft filtering;
In continuous 5～6 single-frame imagess, speed is for just after the driving shaft filtering;
In continuous 30～50 single-frame imagess, before the driving shaft filtering speed for negative single-frame images number less than 3 frames.
Dark H=0.15mm, wide B=0.15mm, length L=10mm, scale mark adjacent spaces D=10mm.
The scale mark color is yellow.
In the b of step 4, for the same scale mark, work as y
1＞y
1', driving shaft is speed V=(y constantly
1-y
1') * D * shooting frame per second/y
0Work as y
1＜y
1', driving shaft is speed V=(y constantly
1-y
1'+y
0) * D * shooting frame per second/y
0
The present invention is non-contact measurement, can not affect the operation of flow field and drive wire, also can be to drive wire structure injury.
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 finishes fast the processing of Drop performance curve and reading of scram parameter, realizes test site drive wire Drop performance instant evaluation, carries out fast the Drop performance analysis.
Embodiment
The present invention may further comprise the steps successively:
1, driving shaft is carried out scale mark, comprising:
A. scale mark distribution length vertically: greater than the 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; Preferred D=10mm;
D. scale mark color: the scale mark color is the color strong with the 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 the above video capture equipment of frame p.s.s 2000; Be preferably phantom digital imaging system series v9 version high-speed camera instrument;
B. equipment debugging: two to three full scale lines are arranged in the 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 the single-frame images processing window, establishing the x direction is the scale mark direction, and the y direction is axially, and intercepting x direction contains whole piece scale mark region, and intercepting y direction contains and contains two scale mark overlay areas; Obtain intensity level R, G, the B of three kinds of monochromes of each pixel;
C. obtain the gray-scale value Y of each pixel in the single-frame images,
Y＝0.299R+0.587G+0.114B；
4, scale mark extracts:
Obtain the gray-scale value average of each pixel in the single-frame images
The gray-scale value of each pixel is carried out the cumulative Y that obtains of gray-scale value according to the x direction
j, each the row gray-scale value after obtaining processing
5, curve processing comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in the former frame image
1, the number of pixels y of y direction in the rear two field picture
1', wherein number of pixels from top to bottom reduces gradually in the y direction;
B. obtain this moment of driving shaft speed V:
For the same scale mark, work as y
1＞y
1', then driving shaft should moment speed V=(y
1-y
1') * D * shooting frame per second/y
0
Work as y
1＜y
1', namely to work as the same scale mark and in the former frame image, be positioned at the image processing window bottom, when being positioned at the image processing window top in the next frame image, driving shaft is speed V=(y constantly
1-y
1'+y
0) * D * shooting frame per second/y
0
C. obtain rate curve, and rate curve is carried out filtering obtain filtered rate curve, filtered rate curve is carried out integration obtain displacement curve, filtered rate curve differentiate is obtained accelerating curve; Wherein the rate curve fallen after the mechanical damping spring of control rod assembly keeps original processing costs, does not do filtering and processes;
6, choose the rate curve that is obtained by the single-frame images that satisfies simultaneously following standard:
In continuous 5～6 single-frame imagess, speed increases continuously after the driving shaft filtering;
In continuous 5～6 single-frame imagess, speed is for just after the driving shaft filtering;
In continuous 30～50 single-frame imagess, before the driving shaft filtering speed for negative single-frame images number less than 3 frames.
Driving shaft is threaded with the connection handle of control rod assembly among the present invention, and during the motion of control rod assembly, driving shaft moves with it unanimously, and the driving shaft kinetic characteristic that then records is the kinetic characteristic of control rod assembly.System extracts its change in location to the scale on the driving shaft and provides scram conditional curve and parameter after obtaining driving shaft motion process video.
Claims (4)
1. Control rod drive line scram process speed measurement method may further comprise the steps successively:
1, driving shaft is carried out scale mark, comprising:
A. scale mark vertically distribution length greater than the 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 the above video capture equipment of frame p.s.s 2000;
B. equipment debugging: two to three full scale lines are arranged in the 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 the single-frame images processing window, establishing the x direction is the scale mark direction, and the y direction is axially, and intercepting x direction contains whole piece scale mark region, and intercepting y direction contains and contains two scale mark overlay areas; Obtain intensity level R, G, the B of three kinds of monochromes of each pixel;
C. obtain the gray-scale value Y of each pixel in the single-frame images,
Y＝0.299R+0.587G+0.114B；
4, scale mark extracts:
Obtain the gray-scale value average of each pixel in the single-frame images
The gray-scale value of each pixel is carried out the cumulative Y that obtains of gray-scale value according to the x direction
j, each the row gray-scale value after obtaining processing
5, curve processing comprises successively:
A. obtain the number of pixels y of identical graduation line y direction in the former frame image
1, the number of pixels y of y direction in the rear two field picture
1', wherein number of pixels from top to bottom reduces gradually in the y direction;
B. obtain this moment of driving shaft speed V;
C. obtain rate curve, the control rod assembly is fallen the rate curve of other parts carries out filtering beyond the rate curve after the mechanical damping spring, obtain filtered rate curve;
6, choose the rate curve that is obtained by the single-frame images that satisfies simultaneously following standard:
In continuous 5～6 single-frame imagess, speed increases continuously after the driving shaft filtering;
In continuous 5～6 single-frame imagess, speed is for just after the driving shaft filtering;
In continuous 30～50 single-frame imagess, before the driving shaft filtering speed for negative single-frame images number 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, wide B=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: the scale mark color is for yellow.
4. a kind of Control rod drive line scram process speed measurement method according to claim 1 is characterized in that: in the b of described step 4, for the same scale mark, work as y
1＞y
1', driving shaft is speed V=(y constantly
1-y
1') * D * shooting frame per second/y
0Work as y
1＜y
1', driving shaft is speed V=(y constantly
1-y
1'+y
0) * D * shooting frame per second/y
0
Priority Applications (1)
| 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 true CN102955041A (en) | 2013-03-06 |
| CN102955041B CN102955041B (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110241238.XA Active 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105701826A (en) * | 2016-01-15 | 2016-06-22 | 中国计量学院 | Method for intercepting separate image of space electric connector |
| CN112599265A (en) * | 2020-12-05 | 2021-04-02 | 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 (1)
| 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》, vol. 28, no. 4, 31 August 2007 (2007-08-31), pages 125 - 127 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105701826A (en) * | 2016-01-15 | 2016-06-22 | 中国计量学院 | Method for intercepting separate image of space electric connector |
| CN105701826B (en) * | 2016-01-15 | 2018-06-29 | 中国计量学院 | A kind of Aerospace Electric Connector separate picture intercept method |
| CN112599265A (en) * | 2020-12-05 | 2021-04-02 | 核电运行研究(上海)有限公司 | Control rod drop time measuring method integrated with rod position measuring equipment |
| 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 |
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|---|---|
| CN102955041B (en) | 2014-06-18 |
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