CN203759399U - Constant current stroboscopic LED light source system - Google Patents
Constant current stroboscopic LED light source system Download PDFInfo
- Publication number
- CN203759399U CN203759399U CN201320342397.3U CN201320342397U CN203759399U CN 203759399 U CN203759399 U CN 203759399U CN 201320342397 U CN201320342397 U CN 201320342397U CN 203759399 U CN203759399 U CN 203759399U
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- CN
- China
- Prior art keywords
- led light
- light source
- constant current
- industrial camera
- lvds
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
A constant current stroboscopic LED light source system is disclosed and comprises an encoder, an industrial camera and LED light sources which provide the camera with light sources. A power source for a circuit of the LED light sources is a constant current source; the constant current stroboscopic LED light source system comprises a control unit, a complex programmable logic device, an LVDS emission chip and an LVDS reception chip; the control unit, the encoder and the LVDS emission chip are electrically connected with the complex programmable logic device; the complex programmable logic device is used for controlling the LVDS emission chip to emit signals to the LVDS reception chip and the industrial camera through PWM signals; the LVDS reception chip is electrically connected to the LED light sources and therefore turn-on time of the LED light sources can be controlled; the industrial camera is used for receiving the signals emitted by the LVDS emission chip and therefore the exposure time of the industrial camera can be controlled to be matched with the turn-on time of the LED light sources. The constant current stroboscopic LED light source system is characterized in that stable light sources can be obtained; from a far end, the turn-on time of the LED light sources can be controlled to be matched with the exposure time of the industrial camera through PWM; the problem that large electric energy consumption is caused when the LED light sources are normally in a turn-on state can be prevented.
Description
[technical field]
The utility model relates to a kind of constant current stroboscopic LED light source system being applied in bill or banknote printing process, relate in particular to and a kind ofly can realize far-end PWM frequent flashing control to LED light source, and can control the constant current stroboscopic LED light source system that the opening time of LED light source and the time shutter of camera match simultaneously.
[background technology]
At present, in the detection of bill or banknote printing process, constant current stroboscopic LED light source system generally adopts high-power LED light source based on Chang Liang to carry out to light for camera.In actual mechanical process, for the image that makes to obtain reaches preferably noise characteristic, conventionally need to increase LED light source to light intensity.Yet because the camera exposure time is shorter, high-power LED light source adopts normal bright pattern directly to cause the waste of a large amount of electric energy; Meanwhile, normal bright pattern directly makes again LED light source for a long time in high temperature febrile state, very easily causes sharply decline the actual life of LED light source.In addition, the power supply in existing constant current stroboscopic LED light source system in LED light source circuit belongs to non-constant current mode substantially, and the fluctuation of the luminous energy following temperature rising of LED light source is larger, easily causes the imaging effect of camera not good; And LED light source can not carry out far-end control in existing constant current stroboscopic LED light source system, install easily limitedly, be difficult to be applicable to different places.
[utility model content]
Therefore, be necessary to provide a kind of constant current stroboscopic LED light source system, the problems referred to above that exist to solve existing constant current stroboscopic LED light source system.
A constant current stroboscopic LED light source system, it comprises scrambler, industrial camera and provides the LED light source of light source for described camera.The power supply of the circuit of described LED light source is constant current source, and described constant current stroboscopic LED light source system further comprises control module, CPLD, LVDS transmitting chip and LVDS receiving chip; Equal and the described CPLD of described control module, described scrambler and described LVDS transmitting chip is electrically connected, described CPLD is controlled described LVDS transmitting chip by pwm signal and is transmitted to described LVDS receiving chip and described industrial camera, described LVDS receiving chip is electrically connected at described LED light source to control the opening time of described LED light source, and the signal that described industrial camera receives described LVDS transmitting chip transmitting matches to control the opening time of its time shutter and described LED light source.
Preferably, described LVDS transmitting chip comprises the first transmitter unit and the second transmitter unit, described LVDS receiving chip receives the signal of described the first transmitter unit transmitting and is electrically connected described LED light source, and described camera receives the signal of described the second transmitter unit transmitting.
Preferably, described LED light source comprises a plurality of LED lamps.
Preferably, described LED light source is high-power LED light source.
Preferably, described industrial camera is high-speed figure industrial camera, has LVDS and triggers input interface.
Preferably, the time shutter section of described industrial camera and the opening time section of described LED light source are overlapping at least partly.
Preferably, the time shutter section of described industrial camera and the opening time section of described LED light source overlap completely.
Preferably, the time shutter section of described industrial camera is contained in the opening time section of described LED light source.
Preferably, described scrambler is synchronization encoders.
Compared to prior art, in the constant current stroboscopic LED light source system that the utility model provides, CPLD is controlled LVDS transmitting chip by pwm signal and is transmitted to LVDS receiving chip and industrial camera, LVDS receiving chip is electrically connected at LED light source to control the opening time of LED light source, and the signal that industrial camera receives the transmitting of LVDS transmitting chip matches to control the opening time of its time shutter and LED light source.Described constant current stroboscopic LED light source system can be carried out far-end PWM frequent flashing control to LED light source, and can control the opening time of LED light source and the time shutter of industrial camera matches simultaneously, can avoid thus LED light source because consuming a large amount of electric energy in normal bright pattern, and can avoid LED light source because declining the serviceable life that causes in high temperature febrile state for a long time.In addition, the power supply of the circuit of described LED light source is constant current source, can guarantee the stability of LED light source, improves the image quality of industrial camera.Meanwhile, by PWM, LED light source is carried out to far-end control, can reduce installation limited degree, improve the scope of application.
[accompanying drawing explanation]
The schematic diagram of the constant current stroboscopic LED light source system that Fig. 1 provides for the utility model one embodiment.
[embodiment]
Below in conjunction with accompanying drawing, introduce in detail specific embodiment of the utility model.
Please refer to Fig. 1, the utility model one embodiment provides a kind of constant current stroboscopic LED light source system 10, it is for the detection of bill or banknote printing process, described constant current stroboscopic LED light source system 10 comprises scrambler 11, industrial camera 12, LED light source 13, control module 14, CPLD (Complex Programmable Logic Device, CPLD) 15, LVDS (Low-Voltage Differential Signaling) transmitting chip 16 and LVDS receiving chip 17.
Described scrambler 11 is electrically connected at described CPLD 15, and described scrambler 11 is for obtaining the bill carried on travelling belt or the positional information of banknote, and obtained positional information is fed back to described CPLD 15.In the present embodiment, described scrambler 11 is synchronization encoders.
Described industrial camera 12 is for carrying out imaging to the bill of carrying on travelling belt or banknote, to obtain the image of bill or banknote.In the present embodiment, described industrial camera 12 is high-speed figure industrial camera, has LVDS and triggers input interface.
Described LED light source 13 is connected in constant current source 18, and described LED light source 13, for described industrial camera 12 provides light source, is to have enough light sources so that described industrial camera 12 obtains the image of bill or banknote.In the present embodiment, described LED light source 13 is high-power LED light source, and it comprises a plurality of LED lamps, is understandable that, a plurality of LED lamps in described LED light source 13 can be arranged in a certain way, as layout in a row.
Be understandable that, the described constant current source 18 in the circuit of described LED light source 13 can guarantee that the brightness of described LED light source 13 is in comparatively stable state.
Described control module 14 and described CPLD 15 are electrically connected, described control module 14 and described CPLD 15 carry out message exchange, with the bill that obtained according to described scrambler 11 or the positional information of banknote, described CPLD 15 are carried out to parameter configuration.
Be understandable that, described control module 14 can be micro-control unit (Micro Control Unit, MCU).
Described CPLD 15 and described LVDS transmitting chip 16 are electrically connected, described CPLD 15 transmits to described LVDS receiving chip 17 and described industrial camera 12 by LVDS transmitting chip 16 described in PWM (Pulse Width Modulation, width modulation) signal controlling.Described LVDS receiving chip 17 is electrically connected at described LED light source 13 to control the opening time of described LED light source 13, and the signal that described industrial camera 12 receives described LVDS transmitting chip 16 transmittings matches to control the opening time of its time shutter and described LED light source 13.In the present embodiment, described LVDS transmitting chip 16 comprises the first transmitter unit 161 and the second transmitter unit 163, described LVDS receiving chip 17 receives the signal of described the first transmitter unit 161 transmittings, and described industrial camera 12 receives the signal of described the second transmitter unit 163 transmittings.
Preferably, the time shutter section of described industrial camera 12 and the opening time section of described LED light source 13 are overlapping at least partly.Thus, can guarantee that described industrial camera 12 is when exposure is taken, described LED light source 13 can provide light source.Be understandable that, the time shutter section of described industrial camera 12 can overlap completely with the opening time section of described LED light source 13, or the time shutter section of described industrial camera 12 is contained in the opening time section of described LED light source 13, it is the time shutter section that the opening time section of described LED light source 13 covers described industrial camera 12 completely, thus, can make described industrial camera 12 when exposure is taken, described LED light source 13 can provide enough light sources.
Described constant current stroboscopic LED light source system 10 is when work, described scrambler 11 feeds back to described CPLD 15 by the bill obtaining or banknote locations information, described CPLD 15 carries out message exchange with described control module 14, and described control module 14 carries out parameter configuration according to the positional information of described scrambler 11 feedbacks to described CPLD 15; Described CPLD 15 is controlled described LVDS transmitting chip 16 emissioning controling signals to described LED light source 13 and described industrial camera 12 by pwm signal.On the one hand, the control signal that described the first transmitter unit 161 is emitted to described LVDS receiving chip 17 makes described LED light source 13 realize stroboscopic according to pwm signal, with guarantee described LED light source 13 when 12 exposure of described industrial camera in bright state; On the other hand, the control signal that described the second transmitter unit 163 is emitted to described industrial camera 12 is carried out exposure image to bill or banknote by the described industrial camera 12 of control when described LED light source 13 is opened.
In described constant current stroboscopic LED light source system 10, CPLD 15 is controlled LVDS transmitting chip 16 by pwm signal and is transmitted to LVDS receiving chip 17 and industrial camera 12, LVDS receiving chip 17 is electrically connected at LED light source 13 to control the opening time of LED light source 13, and the signal that industrial camera 12 receives 16 transmittings of LVDS transmitting chip matches to control the time shutter of himself and the opening time of LED light source 13.Described constant current stroboscopic LED light source system 10 can be carried out far-end PWM frequent flashing control to LED light source 13, and can control the opening time of LED light source 13 and the time shutter of industrial camera 12 matches simultaneously, can avoid thus LED light source 13 because consuming a large amount of electric energy in normal bright pattern, and can avoid LED light source 13 because declining the serviceable life that causes in high temperature febrile state for a long time.In addition, the power supply of the circuit of described LED light source 13 is constant current source 18, can guarantee the stability of LED light source 13, improves the image quality of industrial camera 12.Meanwhile, by PWM, LED light source 13 is carried out to far-end control, can reduce installation limited degree, improve the scope of application.
Although this patent is described with reference to current better embodiment; but those skilled in the art will be appreciated that; above-mentioned better embodiment is only used for illustrating this patent; not be used for limiting the protection domain of this patent; within any spirit at this patent and principle scope; any modification of doing, equivalence replacement, improvement etc., within all should being included in the rights protection scope of this patent.
Claims (9)
1. a constant current stroboscopic LED light source system, it comprises scrambler, industrial camera and provides the LED light source of light source for described industrial camera, it is characterized in that, the power supply of the circuit of described LED light source is constant current source, and described constant current stroboscopic LED light source system further comprises control module, CPLD, LVDS transmitting chip and LVDS receiving chip; Equal and the described CPLD of described control module, described scrambler and described LVDS transmitting chip is electrically connected, described CPLD is controlled described LVDS transmitting chip by pwm signal and is transmitted to described LVDS receiving chip and described industrial camera, described LVDS receiving chip is electrically connected at described LED light source to control the opening time of described LED light source, and the signal that described industrial camera receives described LVDS transmitting chip transmitting matches to control the opening time of its time shutter and described LED light source.
2. constant current stroboscopic LED light source system as claimed in claim 1, it is characterized in that, described LVDS transmitting chip comprises the first transmitter unit and the second transmitter unit, described LVDS receiving chip receives the signal of described the first transmitter unit transmitting and is electrically connected described LED light source, and described industrial camera receives the signal of described the second transmitter unit transmitting.
3. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, described LED light source comprises a plurality of LED lamps.
4. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, described LED light source is high-power LED light source.
5. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, described industrial camera is high-speed figure industrial camera, has LVDS and triggers input interface.
6. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, the time shutter section of described industrial camera and the opening time section of described LED light source are overlapping at least partly.
7. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, the time shutter section of described industrial camera and the opening time section of described LED light source overlap completely.
8. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, the time shutter section of described industrial camera is contained in the opening time section of described LED light source.
9. constant current stroboscopic LED light source system as claimed in claim 1, is characterized in that, described scrambler is synchronization encoders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320342397.3U CN203759399U (en) | 2013-06-07 | 2013-06-07 | Constant current stroboscopic LED light source system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320342397.3U CN203759399U (en) | 2013-06-07 | 2013-06-07 | Constant current stroboscopic LED light source system |
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| Publication Number | Publication Date |
|---|---|
| CN203759399U true CN203759399U (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320342397.3U Expired - Lifetime CN203759399U (en) | 2013-06-07 | 2013-06-07 | Constant current stroboscopic LED light source system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104254179A (en) * | 2014-09-03 | 2014-12-31 | 宁波欣达印刷机器有限公司 | LED (light emitting diode) automatic synchronous stroboscopic device and control method thereof |
| CN108271291A (en) * | 2017-01-16 | 2018-07-10 | 浙江国自机器人技术有限公司 | One kind is based on the infrared stroboscopic illumination lamp system of CAN bus positioning camera constant current self diagnosis |
-
2013
- 2013-06-07 CN CN201320342397.3U patent/CN203759399U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104254179A (en) * | 2014-09-03 | 2014-12-31 | 宁波欣达印刷机器有限公司 | LED (light emitting diode) automatic synchronous stroboscopic device and control method thereof |
| CN108271291A (en) * | 2017-01-16 | 2018-07-10 | 浙江国自机器人技术有限公司 | One kind is based on the infrared stroboscopic illumination lamp system of CAN bus positioning camera constant current self diagnosis |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140806 |