CN101123693A - Scanner for industrial X radial negative using line array video camera - Google Patents
Scanner for industrial X radial negative using line array video camera Download PDFInfo
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- CN101123693A CN101123693A CNA2007101220916A CN200710122091A CN101123693A CN 101123693 A CN101123693 A CN 101123693A CN A2007101220916 A CNA2007101220916 A CN A2007101220916A CN 200710122091 A CN200710122091 A CN 200710122091A CN 101123693 A CN101123693 A CN 101123693A
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- egative film
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- light source
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Abstract
A special scanner used for industrial X-ray films adopting linear array camera belongs to the digital scanning device field. The overall constitution includes a linear array camera(1), a film translational device(2), a light source(4), an electrical motor(7), a speed reducer(6), a special controller and a computer. The light source irradiates the film from the back of the film, the linear array camera scans the film from the front of the film, the shift of the film relative to the linear array camera(1) and the light source(4) is realized by the film translational device(2), the electrical motor (7) and the speed reducer(5) are connected with the film translational device through a shaft coupling(5). The special controller can control the on-off of the light source(4), the start-stop and commutation of the electrical motor(7), the strength and weakness of the light source(4), and the rotational speed of the electrical motor(7). The linear array camera(1) is connected with the computer through a digital image transmission wire, and the special controller is connected with the computer through a data line. Finally, the present invention realizes one time scanning of industrial X-ray films and stores the results in the computer.
Description
Technical field
The present invention relates to a kind of digitalizer of industrial X-ray negative, relate in particular to and a kind ofly cooperate linear light source to realize the digitalizer of industrial X-ray negative scanning imagery specially with line array video camera.
Background technology
Is the most frequently used method in the present industrial X-ray flaw detection by industrial X-ray negative to workpiece evaluation.But, comment the normally manual operations of sheet process, artificial factor is big; In addition, for many staple products,, need in use repeatedly flaw detection regularly, and, be unfavorable for the long-term monitoring of these structural members because egative film is difficult to long-time preservation as the structural member in fields such as boiler, pressure vessel, boats and ships, Aero-Space.Therefore, need a kind of negative plate digitization method of special use.
X-ray film digitizing solution before has following forms: the one, and employing is converted into full television video frequency signal based on the standard video camera to the x-ray film scanning collection and enters image pick-up card, be quantified as a frame of digital image through image pick-up card, and the result left in the frame memory, wherein image pick-up card is by an A/D converter, and the frame memory of input and output look-up table LUT and two 512 * 512 pixels is formed.When carrying out image processing, this system can carry out the demonstration of image simultaneously.Because the image capturing system based on frame frequency need deposit into row " reading " and " writing " operation at frame, speed is very restricted, and the mass ratio of image is relatively poor.
Moreover, the nineties, rising along with the critical component area array CCD performance of ccd video camera, and the develop rapidly of computer PC technology, IMAQ and processor performance based on PC have obtained unprecedented lifting, and a new generation has obtained using widely based on the x-ray film digitization program of high-performance area array CCD and PC.Abroad adopt based on Array CCD Camera the egative film collection,, directly change image into digital signal, carry out integral body by PC and control and data storing through analog to digital converter.But owing to the area array CCD camera strip x-ray film is gathered, once the resolution of Cai Jiing is difficult to satisfy the requirement that X ray detects.The many ccd image sensors of domestic employing are gathered, a plurality of matrix CCD are lined up array, images acquired under the commander of synchronizing signal and acquisition controlling signal, but the geometric correction of imagery, the gamma correction problem of having brought later image reconstruction, each CCD parameter difference to cause, obtain certain effect, but strengthened the difficulty and the complexity of image subsequent treatment.
Though these two kinds of negative plate digitization methods have obtained certain application, owing to they are differing greatly than traditional x-ray film aspect spatial resolution and the picking rate, so be applied in being difficult on a large scale.
In recent years, the instrument producer that respectively exposes thoroughly will begin to pay close attention to high-end digital scanning market, A3 large format transmission scan instrument occur.Because specialized scanner performance is stable, the technology comparative maturity directly carries out digitlization with egative film by the transmission scan instrument and obtains, and has become the digitized direction of following a period of time x-ray film.Regrettably, the transmission scan instrument is mainly used in the scanning of medical science egative film mostly, and industrial X-ray negative sheet base is thicker, and blackness is big, and contrast is very low, does not still have to be directly used in the digitized scanning system of all industrial X-ray negatives at present.
In sum, need a kind of special novel digital scanning means at industrial X-ray negative.
Summary of the invention
The present invention relates to the scanner of a cover industrial X-ray negative, its objective is the scanning imagery of realizing welding or other industrial X-ray flaw detection egative film, be converted into digital picture and store in the computer.
Adopt the industrial X-ray negative scanner of line array video camera, it is characterized in that the overall formation of this device comprises line array video camera 1, egative film mobile device, light source 4, motor 7, computer 21 and controller 22; Its mediella mobile device is an egative film translation device 2, and egative film translation device 2 has egative film supporting plate 11 and egative film gathering sill 12; Egative film supporting plate 11 is positioned at egative film 3 belows and prevents that egative film from dragging for 3 times, and has window block unwanted light and shine under egative film 3; Egative film gathering sill 12 is positioned at egative film 3 porch, prevents egative film 3 oblique feedings, can stretch, and adapts to the requirement of different length egative film 3;
Line array video camera 1, egative film translation device 2 and light source 4 are arranged successively, the egative film 3 egative film translation device 2 of packing into, and the egative film front is over against line array video camera 1, and the back side is over against light source 4;
Respectively there is an optoelectronic switch 23 in the inlet of egative film 3 and exit, optoelectronic switch 23 has delayer, motor 7 has encoder, and the delayer of optoelectronic switch triggers with the frame of line array video camera 1 by controller 22 with the encoder of motor and is connected respectively with the line triggering signal end;
Line array video camera 1 is connected with computer 21 by netting twine or other Digital Image Transmission line, and controller 22 and computer 21 are connected by data wire.
The egative film mobile device of this scanner can also be the egative film tumbler, the egative film tumbler is an annular slot 13, egative film 3 inserts this slot, light source 4 is positioned at annular the slot 13 inner or outside egative films 3 that face toward, line array video camera 1 is positioned at annular the slot 13 outside or inner egative films 3 that face toward, and the egative film tumbler is connected with motor 7 by shaft joint 5.
The motor 7 of this scanner can also be formed transmission device with decelerator 6 and be connected with the egative film mobile device by shaft joint 5.
The photographic density measurement mechanism can also be installed in egative film 3 porch of this scanner, and by controller 22 signal is passed to computer 21, the control time for exposure.
Relation between line array video camera, egative film and the light source three can change that egative film is static into, line array video camera and light source relatively move.
Line array video camera 1 acquisition parameter, drainage pattern, picture size are by the software setting in the computer 21.Line triggering signal control row acquisition time by the encoder of motor 7 is exported makes egative film 3 images in stretching or the compression of vertically not having the part.Under the situation of motor 7 invariablenes turning speeds, line array video camera 1 also can adopt inner continuous trigger mode.
The present invention finally realizes the digital one time scanning of industrial X-ray negative and stores in the computer.
The present invention is further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1～device schematic diagram of the present invention
The egative film supporting plate 11 of Fig. 2～egative film translation device constitutes with egative film gathering sill 12
The formation of Fig. 3～egative film tumbler
The electric composition of Fig. 4～negative film scanner
Reference numeral:
1～line array video camera; 2～egative film translation device; 3～egative film; 4～light source; 5～shaft joint; 6～decelerator; 7～motor; 11～egative film supporting plate; 12～egative film gathering sill; 13～annular slot; 21～computer; 22～controller; 23～optoelectronic switch
Embodiment
Line array video camera 1 adopts line array CCD, light source 4 adopts cold light source, motor 7 is a servomotor, carry encoder, egative film 3 move modes are translation, and the control mode of setting controller 22 is manual, set the egative film translational velocity by controller 22, the luminous intensity of light source 4, optoelectronic switch 23 with the delay time of delayer, CCD adopts the external trigger pattern.
Pattern by the software set egative film collection in the computer 21 is the external trigger pattern, sets and gathers line number and line frequency, sets the columns of images acquired, set the horizontal-shift and the vertical shift of images acquired, time for exposure is a line time, sets CCD gain size, selects the path of image storage.Above parameter all has default value, also can set according to actual needs and preserve, and calls afterwards.
Distance between t1=optoelectronic switch and the film scanning position/film scanning speed
T1 finishes the back and produces an external trigger signal b1, controls light source 4 on the one hand and opens, and is defeated by the linear array camera as the frame triggering signal on the other hand, and camera begins to adopt picture.Length and predetermined one of film scanning speed according to egative film 3 are adopted picture t2 time of delay, wherein, and t2=bottom panel length/film scanning speed
T2 produces a triggering signal b2 after finishing again, and control light source 4 is closed, and imports frame end signal of CCD simultaneously.Shift out the running roller of transporting device fully when egative film 3 after, egative film 3 is taken away, at this moment, another optoelectronic switch 23 responses in exit produce switching signal a2, disable motor 7, and above control is finished by controller 22.
The negative map picture at first reads in calculator memory, can show on screen, is saved in the middle of the predefined file by software then.
Industrial egative film with wide 60mm, a long 300mm is an example, and selecting to gather line number is 6000 row, and columns is 1200 row, line frequency is 1.8kHz, and the camera lens amplification coefficient is adjusted into default value, and this moment, scanning resolution was 0.05mm/s, sweep speed is made as 90mm/s, and the speed that scans whole egative film is 3.3 seconds.
Claims (6)
1. adopt the scanner for industrial X radial negative of line array video camera, it is characterized in that the overall formation of this device comprises line array video camera (1), egative film mobile device, light source (4), motor (7), computer (21) and controller (22); Its mediella mobile device is egative film translation device (2), and egative film translation device (2) comprises egative film supporting plate (11) and egative film gathering sill (12); Egative film supporting plate (11) is positioned at egative film (3) below, and has window under egative film (3), prevents that the egative film gathering sill (12) of the oblique feeding of egative film (3) is positioned at egative film (3) porch;
Line array video camera (1), egative film translation device (2) and light source (4) are arranged successively, egative film (3) the egative film translation device (2) of packing into, and the egative film front is over against line array video camera (1), and the back side is over against light source (4); Motor (7) is connected with egative film translation device (2) by shaft joint (5);
Respectively there is an optoelectronic switch (23) in the inlet of egative film (3) and exit, optoelectronic switch (23) has delayer, motor (7) has encoder, and the delayer of optoelectronic switch triggers with the frame of line array video camera (1) by controller (22) with the encoder of motor and is connected respectively with the line triggering signal end;
Controller (22) is provided with the switch of light source (4), motor (7) start and stop and commutation, is provided with the adjusting knob of light source (4) power, motor (7) rotating speed simultaneously; Controller (22) is provided with manually and automatic selector switch.
2. the scanner for industrial X radial negative of employing line array video camera according to claim 1, it is characterized in that, can also comprise a computer (21), line array video camera (1) is connected with computer (21) by the Digital Image Transmission line, and controller (22) is connected by data wire with computer (21).
3. the scanner for industrial X radial negative of employing line array video camera according to claim 1, it is characterized in that, the egative film mobile device is the egative film tumbler, the egative film tumbler is an annular slot (13), egative film (3) inserts this slot, it is inner or outside facing to egative film (3) that light source (4) is positioned at annular slot (13), and it is outside or inner facing to egative film (3) that line array video camera (1) is positioned at annular slot (13), and the egative film tumbler is connected with motor (7) by shaft joint (5).
4. the scanner for industrial X radial negative of employing line array video camera according to claim 1 is characterized in that, motor (7) is formed transmission device with decelerator (6) and is connected with the egative film mobile device by shaft joint (5).
5. the scanner for industrial X radial negative of employing line array video camera according to claim 1, it is characterized in that, the photographic density measurement mechanism is installed in egative film (3) porch, and by controller (22) signal is passed to computer (21), the control time for exposure.
6. the scanner for industrial X radial negative of employing line array video camera according to claim 1 is characterized in that, under the situation of motor (7) invariablenes turning speed, line array video camera (1) adopts inner continuous trigger mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101220916A CN100493150C (en) | 2007-09-21 | 2007-09-21 | Scanner for industrial X radial negative using line array video camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101220916A CN100493150C (en) | 2007-09-21 | 2007-09-21 | Scanner for industrial X radial negative using line array video camera |
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| Publication Number | Publication Date |
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| CN101123693A true CN101123693A (en) | 2008-02-13 |
| CN100493150C CN100493150C (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718912B (en) * | 2009-11-27 | 2011-05-18 | 北京工业大学 | Digitalized detail visualizer of industrial X-ray negative with variable zooming ratio |
| CN101762615B (en) * | 2010-01-19 | 2011-11-16 | 西安交通大学 | Industrial radiographic inspection negative film digitization device |
| CN107907510A (en) * | 2017-11-25 | 2018-04-13 | 安阳中科工程检测有限公司 | The optical densitometer and optical density (OD) of automatic measurement blackness scope calculate method |
| CN109819135A (en) * | 2019-01-29 | 2019-05-28 | 安徽安科生物工程（集团）股份有限公司 | A kind of quick scanning means of X-ray film |
| CN113155869A (en) * | 2021-03-22 | 2021-07-23 | 太原科技大学 | Automatic digital acquisition and intelligent detection evaluation device for welding seam X-ray negative |
-
2007
- 2007-09-21 CN CNB2007101220916A patent/CN100493150C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718912B (en) * | 2009-11-27 | 2011-05-18 | 北京工业大学 | Digitalized detail visualizer of industrial X-ray negative with variable zooming ratio |
| CN101762615B (en) * | 2010-01-19 | 2011-11-16 | 西安交通大学 | Industrial radiographic inspection negative film digitization device |
| CN107907510A (en) * | 2017-11-25 | 2018-04-13 | 安阳中科工程检测有限公司 | The optical densitometer and optical density (OD) of automatic measurement blackness scope calculate method |
| CN107907510B (en) * | 2017-11-25 | 2019-10-11 | 安阳中科工程检测有限公司 | The optical densitometer and optical density (OD) of automatic measurement blackness range calculate method |
| CN109819135A (en) * | 2019-01-29 | 2019-05-28 | 安徽安科生物工程（集团）股份有限公司 | A kind of quick scanning means of X-ray film |
| CN113155869A (en) * | 2021-03-22 | 2021-07-23 | 太原科技大学 | Automatic digital acquisition and intelligent detection evaluation device for welding seam X-ray negative |
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| Publication number | Publication date |
|---|---|
| CN100493150C (en) | 2009-05-27 |
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