CN201681056U - Industrial high-resolution observation device for X-ray negative films - Google Patents
Industrial high-resolution observation device for X-ray negative films Download PDFInfo
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- CN201681056U CN201681056U CN2009202711036U CN200920271103U CN201681056U CN 201681056 U CN201681056 U CN 201681056U CN 2009202711036 U CN2009202711036 U CN 2009202711036U CN 200920271103 U CN200920271103 U CN 200920271103U CN 201681056 U CN201681056 U CN 201681056U
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Abstract
An industrial high-resolution observation device for X-ray negative films relates to shooting and digitizing devices, and is used for realizing the digital process on the X-ray negative films detecting industrial welding seams. The device includes a light source (1), a zoom lens (3), a digital camera (6) connected with the lens (3), and a computer (10) connected with the digital camera (6), and further includes a snoot (2), a moving mechanism, a focusing mechanism, and a stepper motor controller (9), wherein the computer (10) owns definition-judging and automatic-focusing programs. LED uniform strong light are used to transmit the films and to achieve illumination, the zoom macro lens and the industrial area-array digital camera are used to acquire the images of the films and the acquired images are transmitted to the computer in a real-time manner. An operator can send instructions through the computer, drive and operate the system, scale the acquired images of the films and then observe the local details of the films. During the zooming process, the computer drives the focusing mechanism through the definition-judging and automatic-focusing algorithms to realize the real-time automatic focusing and ensure that images have no distortion during the zooming.
Description
Technical field
The utility model is a kind of high-resolution observation device of industrial X-ray negative, is used to realize the digitized processing to industrial weld seam detection x-ray film.
Background technology
Since the X ray detection technique occurred, X ray detected digitizing technique and just receives publicity always.Along with the conventional equipment manufacturing industry to informationization, intelligentized lifting and development, proposed the digitized image of industrial X-ray negative is obtained, the demand of storage administration and robotization evaluation thereof, wherein, as the informationalized first step, the harmless of realization x-ray film (do not lost evaluation information, undistorted), long-term, effectively preserve, transmission and management, the x-ray film digitized image is obtained and the Study on Technology of obtaining automatically of defect information seems particularly urgent.
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 Flame Image Process, 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.More research mainly concentrates on follow-up Flame Image Process aspect.From the image information of having obtained, because resolution is lower, a large amount of trickle defective on the egative film as fine crack, has all been lost in digitized process.Adopting as camera lens of most of negative plate digitization systematic studyes all adopted common standard lens, in the optical imagery process, and object distance, image distance, focal length is all immutable, has caused the imaging enlargement ratio unadjustable, also makes total system can't realize higher resolution.In the whole digitized process, focusing, focusing wait operation by artificial control, also bring some unnecessary errors unavoidably.
In recent years, the negative plate digitization sweeping scheme that adopts line-scan digital camera and linear light sorurce to realize is applied, mainly be at the egative film defect information comparatively tangible elongated egative film develop.In the film scanning process, the resolution of scanning, the real-time regulated of the dynamic range of scanning all is restricted.Big at some density, dynamic range is big, and some have the X ray industry egative film of local small information, and detail pictures information is obtained in very difficult realization.
Therefore, need a kind of digitization system of realizing the observation of local message details specially at X ray industry egative film.
Summary of the invention
The purpose of this utility model is to provide a kind of operator to send steering order by computing machine, and the actuation movement system realizes egative film is adopted the convergent-divergent of picture and the digitalizer of the industrial X-ray negative that can focus automatically, to observe the local detail of egative film.
To achieve these goals, the utility model has been taked following technical scheme: the high-resolution observation device of industrial X-ray negative comprises light source, camera lens, the industrial digital camera head that links to each other with camera lens, the computing machine that is connected with digital camera head.This device also comprise the industrial X-ray negative placed that is positioned at the light source front snoot, can make travel mechanism that digital camera head moves, can be to the Focusing mechanism of camera lens focusing, under computer control, can drive the controllor for step-by-step motor of travel mechanism and Focusing mechanism.Wherein, described snoot is made of diffuse reflection light-passing board or Fresnel Lenses and framework; Travel mechanism comprises the lifting slider that can settle digital camera head, the translation stage that is connected by leading screw with lifting slider, the stepper motor that drives the leading screw rotation; Described Focusing mechanism is that stepper motor drives the camera lens focusing by the gear combination of focusing; Described controllor for step-by-step motor is connected with stepper motor and computing machine; In addition, described computing machine contains definition judgment and automatic focusing program.
Described light source adopts 4 great power LEDs to form face battle array white light source.
Described camera lens adopts three variable micro-lenss (focal length is variable, and aperture is variable, and enlargement ratio is variable).
Described digital camera head adopts industrial big dynamic CMOS face battle array digital camera head.
Described definition judgment and automatic focusing program adopt following method establishment:
1) image is done two-dimensional Fourier transform, obtain the spectrogram of image;
2) be the center of circle with the spectrogram mid point, picture altitude is that diameter is done a circle;
3) will justify interior spectrogram gray-scale value addition and obtain functional value;
4) the current functional value of record makes stepper motor just change a step; Repeating step 1) to 3); The functional value of new functional value and record is compared, and when the functional value of functional value greater than record, execution in step 4 once more); When the functional value of functional value, go to step 5) less than record;
5) the current functional value of record reverses a step stepper motor; Repeating step 1) to 3); The functional value of new functional value and record is compared, and when the functional value of functional value greater than record, execution in step 5 once more); When the functional value of functional value, go to step 6) less than record;
6) make stepper motor just change a step; The output picture rich in detail.
Good effect of the present utility model: adopt even LED high light transmission egative film that illumination is provided, and use three variable micro-lenss and industrial battle array digital camera head that egative film is adopted picture, images acquired is sent to computing machine in real time.The operator can send steering order by computing machine, and the actuation movement system realizes egative film is adopted the convergent-divergent of picture, to observe the local detail of egative film.In the convergent-divergent process, computing machine drives focusing system by definition judgment and automatic focus algorithm, realizes focusing automatically in real time, guarantees that the image in the convergent-divergent process is undistorted.
Description of drawings
Fig. 1 forms synoptic diagram for the utility model;
Fig. 2 is a software systems block diagram in the utility model.
Among the figure: 1. light source, 2. snoot, 3. camera lens, 4. focusing gear combination, 5A, 5B. stepper motor, 6. digital camera head, 7. lifting slider, 8. translation stage, 9. controllor for step-by-step motor, 10. computing machine.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the utility model is elaborated.
This installs, and each parts assembles as shown in Figure 1, each parts specifies as follows among the figure:
1. light source 1 adopts 4 great power LEDs to form face battle array white light source.Length 100mm, width 50mm, power 40w, driving voltage 60V-72V, maximum current 700mA, luminous flux 2800LM-3200LM;
2. snoot 2 adopts frosted glass or the Fresnel Lenses of 100mm * 50mm, and frosted glass or Fresnel Lenses are installed in the upper surface of quadra, and framework covers on above the light source 1; Frame inner surface is for white or be provided with catoptron.
3. camera lens 3 adopts three variable micro-lenss (focal length is variable, and aperture is variable, and enlargement ratio is variable), and camera lens 3 is installed on the digital camera head 6.
4. focusing gear combination 4 adopts 1: 4 aluminium alloy involute spur gearing group, gear wheel diameter 100mm, pinion wheel diameter 25mm.Pinion wheel is connected with stepper motor 5A, and gear wheel is connected with camera lens 3, and stepper motor 5A is installed on the digital camera head 6.
5. stepper motor 5A, B adopt two-phase hybrid stepping motor, are connected with controllor for step-by-step motor 9.
6. digital camera head 6 adopts the CMOS industrial camera of high speed large dynamic range, and digital camera head 6 is installed on the lifting slider 7.
7. lifting slider 7 is connected with leading screw in being installed in translation stage 8, and leading screw is connected with stepper motor 5B.
8. controllor for step-by-step motor 9 adopts the stepper motor general purpose controller, and controllor for step-by-step motor 9 is connected with computing machine by serial ports.
9. computing machine uses the common PC assembling, and inside is equipped with and is adopted picture software and definition judgment and automatic focusing program, and is connected with digital camera head 6.
X-ray film is placed on snoot 2 tops, and led light source 1 sends high light and illuminates egative film by snoot.Like this, be positioned at the camera lens 3 and digital camera head 6 of egative film top, just can collect the image of egative film.The negative map picture that the operator can collect by computing machine 10 Real Time Observation cameras, and can be at any time send instruction by computing machine according to demand and drive translation stage 8 and drive digital camera head 6 and camera motions, realize convergent-divergent to egative film.In motion process, because the relative motion of camera, camera lens and egative film makes object distance change.By object distance (u), at a distance of (v) with the relation of focal length (f)
As can be seen, when object distance (u) changes, at a distance of (under the v) constant situation,, losing Jiao, cause collect image blurring if do not change focal length (f).When the clear picture degree that collects by judgement when computing machine is unintelligible, will drive stepping motor 5 regulate lens focus (f) by focusing gear combination 4, make object distance, satisfy again at a distance of relation with focal length
So just can collect distinct image, realize in real time focusing automatically.
In order to realize that computing machine judges the readability of image automatically, just need to select a suitable image definition function, computing machine just can be determined the readability of image by the sharpness functional value of computed image.In the utility model, the summation of the gray-scale value of extraction image spectrum HFS is as the image definition function after the employing two-dimensional Fourier transform.
When image is arrived in computer acquisition, at first image is done two-dimensional Fourier transform, obtain the spectrogram of image.As everyone knows, image is clear more, and the part that the such grey scale change in lines and edge is violent in the image just shows obvious more, and it is exactly the HFS of frequency spectrum that the violent part of this variation is embodied on the frequency spectrum.Distinct image has more details, and the component of its high frequency is more in frequency domain.And in the graphical spectral figure of two-dimensional Fourier transform gained, HFS just in time is positioned at the center of spectrogram.Therefore, be the center of circle with the spectrogram mid point, picture altitude is that diameter is done a circle, just includes the radio-frequency component of image in the circle.If the spectrogram gray-scale value addition in will justifying, the value that obtains just can be thought this image definition functional value.Clear picture, frequency spectrum medium-high frequency composition is just many, and the value of gray-scale value addition gained is just big in the circle.On the contrary, image blurring, frequency spectrum medium-high frequency composition is just few, and the value of gray-scale value addition gained is just little in the circle.According to this principle design definition judgment program (sharpness function), utilize this function to adjust stepper motor 5A in Focusing mechanism, until obtaining picture rich in detail, as shown in Figure 2.Program in the utility model also comprises " user interface ", utilizes this program artificially to adjust camera lens 3 and digital camera head 6 relative industrial X-ray negative distances, the picture of egative film is dwindled or amplifies, and obtains the panorama picture or the details picture of egative film.
When using this device, at first, industrial X-ray negative is placed on the snoot 2, light source 1 sees through snoot egative film is illuminated.At this moment, digital camera head 6 is gathered the image of egative film in real time by camera lens 3, and image is sent to computing machine 10 in real time by capture card.Image is shown to the operator by computing machine, and simultaneously, computing machine judges by an image definition decision function whether shown image is clear all the time.If not fogging clear, computing machine will drive stepping motor 5 pass through the focal length that focusing gear set 4 is regulated camera lenses 3.Up to computer acquisition to image definition reach maximum, object distance, at a distance of satisfying relation with focal length
Focusing is finished, and computing machine sends instruction and stops the stepper motor motion.Continue simultaneously to judge the image definition that is collected by the image definition decision function.
Owing to have part egative film detailed information very small, need observe its details by amplifying.The operator can send steering order by computing machine, drives translation stage 8, makes lifting slider 7 drive camera lens 3 and moves to the egative film direction with digital camera head 6.At this moment, the image that collects will amplify along with reducing of relative distance between camera lens and the egative film, and the visual field of image can dwindle thereupon, realizes the details observation.Because the variable in distance between camera lens and the egative film causes object distance to change, the image that collects is owing to losing burnt become fuzzy.When the sharpness functional value decrease that goes out institute's images acquired when COMPUTER CALCULATION reaches 5%, think not fogging clear, start automatic focusing program.Think that by serial ports stepper motor driver sends instruction control stepper motor 5 and drives the focal length that focusing gear set 4 is regulated camera lens 3, make image definition reach maximum, stop the focusing program again, transfer monitored state to.So, system all the time the image that keeps being collected of the mode by supervision-focusing be clearly all the time.
When needs were gathered the egative film panorama, the operator sent instruction by computing machine, drove translation stage 8, made lifting slider 7 drive camera lens 3 and moved upward with digital camera head 6, away from egative film.At this moment, image can dwindle, and the visual field can increase.Because object distance changes, image lose burnt and become fuzzy, computer starting focusing program, focusing automatically makes image keep clear state.
The operator can be saved to the image that collects in the database in the whole operation process at any time, realizes the digitizing of industrial X-ray negative.
Claims (4)
1. the high-resolution observation device of industrial X-ray negative comprises light source (1), camera lens (3), the industrial digital camera head (6) that links to each other with camera lens (3), the computing machine (10) that is connected with digital camera head (6); It is characterized in that: this device also comprise the industrial X-ray negative placed that is positioned at light source (1) front snoot (2), can make travel mechanism that digital camera head (6) moves, can be to the Focusing mechanism of camera lens focusing, under computer control, can drive the controllor for step-by-step motor (9) of travel mechanism and Focusing mechanism; Wherein, described snoot (2) is made of diffuse reflection light-passing board or Fresnel Lenses and framework; Travel mechanism comprises the lifting slider (7) that can settle digital camera head (6), the translation stage (8) that is connected by leading screw with lifting slider (7), the stepper motor (5A) that drives the leading screw rotation; Described Focusing mechanism is that stepper motor (5B) drives camera lens (3) focusing by focusing gear combination (4); Described controllor for step-by-step motor (9) is connected with stepper motor (5A, 5B) and computing machine.
2. the high-resolution observation device of industrial X-ray negative as claimed in claim 1 is characterized in that: 4 great power LEDs compositions of described light source (1) employing face battle array white light sources.
3. the high-resolution observation device of industrial X-ray negative as claimed in claim 1 or 2 is characterized in that: described camera lens (3) the employing three variable micro-lenss that focal length is variable, aperture is variable, enlargement ratio is variable.
4. the high-resolution observation device of industrial X-ray negative as claimed in claim 3 is characterized in that:
Described digital camera head (6) adopts industrial big dynamic CMOS face battle array digital camera head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009202711036U CN201681056U (en) | 2009-11-27 | 2009-11-27 | Industrial high-resolution observation device for X-ray negative films |
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| CN2009202711036U CN201681056U (en) | 2009-11-27 | 2009-11-27 | Industrial high-resolution observation device for X-ray negative films |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830129A (en) * | 2012-08-27 | 2012-12-19 | 张峰 | Quick high-definition digitalized recording device for ray detection negative film for welded joints of pressure-bearing equipment |
| CN106153651A (en) * | 2016-08-22 | 2016-11-23 | 合肥德泰科通测控技术有限公司 | Digitized seam inspection scaling system |
| CN106292003A (en) * | 2016-08-16 | 2017-01-04 | 凌云光技术集团有限责任公司 | A kind of automatic adjusting method for optical detection LCD screen, Apparatus and system |
| US9917133B2 (en) | 2013-12-12 | 2018-03-13 | General Electric Company | Optoelectronic device with flexible substrate |
| US9935152B2 (en) | 2012-12-27 | 2018-04-03 | General Electric Company | X-ray detector having improved noise performance |
| US10732131B2 (en) | 2014-03-13 | 2020-08-04 | General Electric Company | Curved digital X-ray detector for weld inspection |
| CN112835172A (en) * | 2020-12-31 | 2021-05-25 | 华兴源创(成都)科技有限公司 | Automatic focusing method and system for constant-magnification imaging |
-
2009
- 2009-11-27 CN CN2009202711036U patent/CN201681056U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830129A (en) * | 2012-08-27 | 2012-12-19 | 张峰 | Quick high-definition digitalized recording device for ray detection negative film for welded joints of pressure-bearing equipment |
| CN102830129B (en) * | 2012-08-27 | 2015-07-15 | 山东省特种设备检验研究院 | Quick high-definition digitalized recording device for ray detection negative film for welded joints of pressure-bearing equipment |
| US9935152B2 (en) | 2012-12-27 | 2018-04-03 | General Electric Company | X-ray detector having improved noise performance |
| US9917133B2 (en) | 2013-12-12 | 2018-03-13 | General Electric Company | Optoelectronic device with flexible substrate |
| US10732131B2 (en) | 2014-03-13 | 2020-08-04 | General Electric Company | Curved digital X-ray detector for weld inspection |
| CN106292003A (en) * | 2016-08-16 | 2017-01-04 | 凌云光技术集团有限责任公司 | A kind of automatic adjusting method for optical detection LCD screen, Apparatus and system |
| CN106292003B (en) * | 2016-08-16 | 2019-08-16 | 凌云光技术集团有限责任公司 | A kind of automatic adjusting method for optical detection LCD screen, apparatus and system |
| CN106153651A (en) * | 2016-08-22 | 2016-11-23 | 合肥德泰科通测控技术有限公司 | Digitized seam inspection scaling system |
| CN112835172A (en) * | 2020-12-31 | 2021-05-25 | 华兴源创(成都)科技有限公司 | Automatic focusing method and system for constant-magnification imaging |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101222 Termination date: 20111127 |