CN201421434Y - CTP plate making quality detecting device based on digital signal processor - Google Patents
CTP plate making quality detecting device based on digital signal processor Download PDFInfo
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- CN201421434Y CN201421434Y CN2009200330082U CN200920033008U CN201421434Y CN 201421434 Y CN201421434 Y CN 201421434Y CN 2009200330082 U CN2009200330082 U CN 2009200330082U CN 200920033008 U CN200920033008 U CN 200920033008U CN 201421434 Y CN201421434 Y CN 201421434Y
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- light source
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- light shield
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Abstract
The utility model discloses a CTP plate making quality detecting device based on a digital signal processor, which comprises a light shield with four surfaces closed, wherein a through hole is arranged in the center at the top of the light shield, ground glass is arranged below a closed part at the top of the light shield, an LED light source hole is arranged at the top of the light shield, an LEDlight source is arranged in the LED light source hole, a collecting hole is arranged at the bottom of the light shield, a total reflecting prism is arranged at a distance above the through hole, a microlens is arranged to form an angle of 90 degrees with the total reflecting prism, a CCD camera is arranged at a distance with the microlens, the CCD camera is connected with a DSP system board, anda functional keyboard, an LED screen, a multicolor annular light source control circuit, a JTAG and a serial port are also connected with the DSP system board. The CTP plate making quality detecting device processes collected printing plate images, displays processed information, and can simultaneously select different light sources according to laser light sources used by different plate making machines and corresponding CTP plate making materials.
Description
Technical field
The utility model belongs to printing quality detection technique field, relates to a kind of pick-up unit, is specifically related to a kind of CTP plate-making quality pick-up unit based on digital signal processor.
Background technology
CTP (Computer-to-plate) is the abbreviation of Computer To Plate, the CTP platemaking equipment is to adopt computing machine directly to control laser generator, by laser beam scan exposure imaging on the CTP plate, make forme by following process (as development, solid version, roasting version etc.) operation then.It is that the blue laser of argon ion of 488nm, the green laser of YAG, wavelength that wavelength is 532nm are that 830nm near-infrared laser, wavelength are the infrared laser of 1064nm and purple laser that wavelength is 400nm etc. that LASER Light Source commonly used has wavelength, correspond to different LASER Light Source, the CTP plate mainly is divided into photosensitive system CTP plate, sensible heat system CTP plate, purple laser system CTP plate etc.The imaging effect of different lasing light emitters and different plates is different for the effect of digital image acquisition.In the plate-making process, factors such as the performance of platemaking equipment (as the varifocal of the focal length of laser head, laser head from, the luminous power of laser and rotating speed of cylinder etc.), development conditions (as the chemical constitution of developer solution, temperature, concentration etc.), technology controlling and process (setting of various technological parameters is as time shutter, development time etc.), environmental baseline (as the humidity in version room, temperature, illumination condition etc.) all can influence plate-making quality.
At present the quality monitoring of forme is undertaken by detecting the forme control strip, the forme control strip is exposed by the CTP platemaking machine together along with the space of a whole page to be printed and through subsequent treatment, is positioned at the horizontal edge place of forme.The forme control strip generally comprises dot area (also claiming step-wedge), lines zone, chessboard zone, reproduces quality indexs such as (smooth degrees of line size and line edge etc.) by detection dot reproduction quality (site size, shape, edge contour etc.), lines and judges comprehensively whether the performance of platemaking equipment, development conditions, technology controlling and process, environmental baseline etc. meet the plate-making quality requirement.At present, hand-held plate quality detector has two types of densitometer and site imagers: (1) densitometer: use reflection densitometer, measure field density and dot density in the step-wedge, with Mu Lai-Davis's formula or You Er-Nelson's Equation for Calculating dot area percentage, this quasi-instrument can only calculate dot area percentage and can't measure other technical parameter; (2) site imager: use the step-wedge image on the camera collection forme control strip, rely on the special image process chip that halftone dot image is handled, draw the testing results relevant such as dot area percentage, dot shape, screen angle with the site, this quasi-instrument is because the curing of built-in image processing algorithm, therefore the image processing algorithm upgrading is difficult for, and only can the dot area in the control strip be detected at present.
Summary of the invention
The purpose of this utility model provides a kind of CTP plate-making quality pick-up unit based on digital signal processor, has solved existing quality detection device and has judged plate-making quality, the problem that detected object is single by the parameter that detects the site.
The technical scheme that the utility model adopted is, a kind of CTP plate-making quality pick-up unit based on digital signal processor, comprise the Lights section, the Lights section comprises circumferential closed light shield, the light shield top center has light hole, the below of light shield top seal part is provided with frosted glass, have the led light source hole on the top plan of light shield, led light source is provided with led light source in the hole, the bottom of light shield has gathers the hole, the top of the light hole segment distance of being separated by is provided with total reflection prism, be provided with microlens at an angle of 90 with total reflection prism, be provided with the CCD camera with the microlens segment distance of being separated by, the CCD camera is connected with the dsp system plate, also be connected with function keyboard on the dsp system plate, the LCD screen, polychrome annular control circuit for light source, JTAG, serial ports, power supply are respectively and the Lights section, polychrome annular control circuit for light source, the CCD camera, the dsp system plate is connected with the LCD screen.
Characteristics of the present utility model also are,
Led light source hole wherein is provided with four at least, and white LED light source, red-light LED light source, green light LED light source and blue-ray LED light source are assemblied in the led light source hole at interval;
The light shield sidewall outside wherein is nested with the object distance regulating ring.
The beneficial effects of the utility model are, the structure that adopts the Lights section to be connected with total reflection prism, microlens, CCD camera, dsp system plate, thereby the forme image that collects is handled, and the information after the display process, can select different light sources according to different CTP platemaking machine used LASER Light Source and corresponding C TP printmaking plate simultaneously.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is the vertical view of the Lights section among a kind of embodiment of the utility model;
Fig. 3 is the structural representation of the Lights section among a kind of embodiment of the utility model;
Fig. 4 is that dsp system plate port connects block diagram among a kind of embodiment of the utility model;
Fig. 5 is a polychrome annular control circuit for light source synoptic diagram among a kind of embodiment of the utility model.
Among the figure, 1. gather hole, 2. object distance regulating ring, 3. light shield, 4.LED light source, 5. light hole, 6. frosted glass, 7. forme control strip, 8. the Lights section, 9. total reflection prism, 10. microlens, 11.CCD camera, 12. function keyboards, 13.LCD screen, 14.DSP system board, 15. polychromes annular control circuit for light source, 16.JTAG, 17. serial ports, 18. power supplys.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The structure of the utility model pick-up unit, as shown in Figures 1 and 2, comprise the Lights section 8, the Lights section 8 comprises light shield 3, the light shield 3 sidewalls outside is nested with object distance regulating ring 2, the top center of light shield 3 has light hole 5, the below of light shield 3 top seals part is provided with annular frosted glass 6, have several led light source holes on the top plan of light shield 3, the led light source 4 of four kinds of colors: white light source, red light source, green light source, blue-light source is assemblied in the led light source hole at interval, the bottom of light shield 3 has gathers hole 1, the top of light hole 5 is provided with total reflection prism 9, be provided with microlens 10 at an angle of 90 with total reflection prism 9, be provided with CCD camera 11 with microlens 10 segment distance of being separated by, CCD camera 11 is connected with dsp system plate 14, be connected with function keyboard 12 on the dsp system plate 14, LCD screen 13, polychrome annular control circuit for light source 15, JTAG16, serial ports 17, power supply 18 respectively with the Lights section 8, polychrome annular control circuit for light source 15, CCD camera 11, dsp system plate 14, LCD screen 13 is connected.
During use, as shown in Figure 3, forme control strip 7 levels are placed on the below that hole 1 is gathered in light shield 3 bottoms, make and gather the to be measured zone of hole 1 corresponding to forme control strip 7, instrumentality is finely tuned apart from the height of 2 pairs of light shields 3 of regulating ring, thereby the object distance that is fixed, make in the image acquisition process and can not influence image definition because of the variation of object distance, the light that led light source 4 sends is downwards by gathering hole 1 uniform irradiation on forme control strip 7, the light hole 5 of the reflection ray that produces by light shield 3 tops is to being uploaded to total reflection prism 9, total reflection prism 9 makes a part of reflection ray reach the human eye observation port vertically upward, the operator can carry out coarse positioning to forme control strip 7 zones to be measured by the human eye observation port, the horizontal light of one-tenth passed to microlens 10 after another part reflection ray carried out 90 ° of reflections by total reflection prism 9, be projected in after microlens 10 imagings on the CCD sensor devices in the CCD camera 11, the dsp system plate 14 that is connected with CCD camera 11 is with vision signal real-time echo on LCD screen 13, make the operator carry out fine positioning to forme control strip 7 zones to be measured, and carry out image acquisition, the processing of dot area, the processing of linearity region, the processing in gridiron pattern zone, processing such as plate quality fuzzy comprehensive evoluation, information after the processing is presented on the LCD screen 13, function keyboard 12 is used to control the function selecting that 14 pairs of images of dsp system plate are handled, polychrome annular control circuit for light source 15 is used to select light source, the user can be used according to different CTP platemaking machine LASER Light Source and corresponding C TP printmaking plate, by the light source options button in the function button, the light source that selection adapts, to obtain the digital picture in zone to be measured on the forme control strip 7 clearly, the JTAG16 port can be connected with computing machine by the DSP emulator, realize upgrading of forme detection algorithm and function expansion, serial ports 17 can be connected with serial ports of computers, when needs, can export detected data to computing machine as the image or the result of being gathered.
The image processing section of present embodiment adopts digital signal processor DSP system board 14 to realize, dsp system plate 14 ports connect block diagram as shown in Figure 4, dsp system plate 14 is a core processor with TMS320DM642, dominant frequency with 600MHz is widely used in the Embedded Application such as digital video monitoring terminal, mobile phone, digital camera.The TMS320DM642 core processor comprises:
(1) three configurable video port VP0, VP1, VP2 can provide the seamless interfacing with ordinary video input and output demoder, scrambler, connect CCD camera 11 and LCD screen 13;
(2) 64 external memory interface EMIF, can with multiple storer such as the seamless binding of flash memory FLASH, the needed software code of pick-up unit is solidificated among the flash memory FLASH by the JTAG programming, can realize portable detection;
(3) general input GPIO provides general purpose I/O to support, in the present embodiment, part GPIO mouth is changed to output, is used to connect polychrome annular control circuit for light source 15; Part GPIO mouth is changed to input, is used to connect the function keyboard 12 of man-machine interaction;
(4) meet JTAG (Joint Test Action Group) the standard testing interface of IEEE1149 standard, can debug to the DSP loading procedure with to program by the DSP emulator.
Present embodiment selects for use the led light source 4 (white light source group W, red light source group R, green light source group G, blue-light source group B) of four kinds of colors uniformly-spaced to be assemblied in the led light source hole on the light shield 3.Polychrome annular control circuit for light source 15 synoptic diagram as shown in Figure 5, four kinds of light sources use same power supply 18 power supplies, adopt the electronic switch of four PNP triodes as every group of light source.The base stage of four triodes connects four GPIO mouths of dsp board respectively, four GPIO mouths all are changed to output state, light source selection key in the functions of use keyboard 12 is controlled the output valve of four GPIO mouths simultaneously, and synchronization only allows in four GPIO mouths to be low level.When one of them GPIO mouth is low level, corresponding PNP transistor emitter and collector conducting, respective color led light source group is luminous, and other three GPIO mouths are high level, and corresponding PNP transistor emitter and collector open circuit, and the led light source group is not luminous.By above mode, the led light source group that makes four kinds of colors realizes the round-robin switch under the control of a button, select the light source of optimal colors with this.
In the present embodiment, led light source 4 and dsp system plate 14 need the 5V operating voltage, and CCD camera 11 and LCD screen 13 need the 12V operating voltage.Adopt universal power adapter, the 220V alternating current is converted to the direct current of 12V, be directly used in the pick-up unit power supply.In pick-up unit, the 12V operating voltage is respectively to CCD camera 11 and 13 power supplies of LCD screen, adopt the DC/DC power transfer module that the operating voltage of 12V is converted to the operating voltage of 5V simultaneously, the 5V operating voltage that obtains is respectively to led light source 4 and 14 power supplies of dsp system plate.
The utility model is based on the CTP plate-making quality pick-up unit of digital signal processor, the structure that adopts the Lights section to be connected with total reflection prism, microlens, CCD camera, dsp system plate, thereby the forme image that collects is handled, and the information after the display process, can select different light sources according to different CTP platemaking machine used LASER Light Source and corresponding C TP printmaking plate simultaneously.
Claims (3)
1. CTP plate-making quality pick-up unit based on digital signal processor, it is characterized in that, comprise the Lights section (8), the Lights section (8) comprises circumferential closed light shield (3), light shield (3) top center has light hole (5), the below of light shield (3) top seal part is provided with frosted glass (6), have the led light source hole on the top plan of light shield (3), be provided with led light source (4) in the led light source hole, the bottom of light shield (3) has gathers hole (1), the top of described light hole (5) segment distance of being separated by is provided with total reflection prism (9), be provided with microlens (10) at an angle of 90 with total reflection prism (9), be provided with CCD camera (11) with microlens (10) segment distance of being separated by, CCD camera (11) is connected with dsp system plate (14), also be connected with function keyboard (12) on the dsp system plate (14), LCD shields (13), polychrome annular control circuit for light source (15), JTAG (16), serial ports (17), power supply (18) are respectively and the Lights section (8), polychrome annular control circuit for light source (15), CCD camera (11), dsp system plate (14) is connected with LCD screen (13).
2. the CTP plate-making quality pick-up unit based on digital signal processor according to claim 1, it is characterized in that, described led light source hole is provided with four at least, and white LED light source (4), red-light LED light source (4), green light LED light source (4) and blue-ray LED light source (4) are assemblied in the led light source hole at interval.
3. the CTP plate-making quality pick-up unit based on digital signal processor according to claim 1 is characterized in that, described light shield (3) the sidewall outside is nested with object distance regulating ring (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200330082U CN201421434Y (en) | 2009-05-08 | 2009-05-08 | CTP plate making quality detecting device based on digital signal processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200330082U CN201421434Y (en) | 2009-05-08 | 2009-05-08 | CTP plate making quality detecting device based on digital signal processor |
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| Publication Number | Publication Date |
|---|---|
| CN201421434Y true CN201421434Y (en) | 2010-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200330082U Expired - Fee Related CN201421434Y (en) | 2009-05-08 | 2009-05-08 | CTP plate making quality detecting device based on digital signal processor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105662343A (en) * | 2016-01-05 | 2016-06-15 | 中国科学院苏州生物医学工程技术研究所 | Dry eye detection and handheld imaging device and dry eye detection device and detection method thereof |
| CN106018435A (en) * | 2016-08-08 | 2016-10-12 | 无锡宇宁智能科技有限公司 | Device for detecting appearance of SMT mounted product |
| CN106370671A (en) * | 2016-10-12 | 2017-02-01 | 浙江理工大学 | PCB (printed circuit board) component detection system and method based on machine vision |
| CN107526254A (en) * | 2016-06-21 | 2017-12-29 | 乐凯华光印刷科技有限公司 | A kind of detection method of the combination property of high speed online production heat-sensitive positive picture CTP plate material |
| CN108469362A (en) * | 2018-01-31 | 2018-08-31 | 浙江康尔达新材料股份有限公司 | A kind of detection model for CTP plate performance detections |
-
2009
- 2009-05-08 CN CN2009200330082U patent/CN201421434Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105662343A (en) * | 2016-01-05 | 2016-06-15 | 中国科学院苏州生物医学工程技术研究所 | Dry eye detection and handheld imaging device and dry eye detection device and detection method thereof |
| CN105662343B (en) * | 2016-01-05 | 2021-01-15 | 中国科学院苏州生物医学工程技术研究所 | Dry eye detection handheld imaging device and dry eye detection equipment |
| CN107526254A (en) * | 2016-06-21 | 2017-12-29 | 乐凯华光印刷科技有限公司 | A kind of detection method of the combination property of high speed online production heat-sensitive positive picture CTP plate material |
| CN106018435A (en) * | 2016-08-08 | 2016-10-12 | 无锡宇宁智能科技有限公司 | Device for detecting appearance of SMT mounted product |
| CN106370671A (en) * | 2016-10-12 | 2017-02-01 | 浙江理工大学 | PCB (printed circuit board) component detection system and method based on machine vision |
| CN108469362A (en) * | 2018-01-31 | 2018-08-31 | 浙江康尔达新材料股份有限公司 | A kind of detection model for CTP plate performance detections |
| CN108469362B (en) * | 2018-01-31 | 2020-09-08 | 浙江康尔达新材料股份有限公司 | Detection template for CTP plate performance detection |
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Legal Events
| 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: 20100310 Termination date: 20120508 |