CN104254179A - LED (light emitting diode) automatic synchronous stroboscopic device and control method thereof - Google Patents
LED (light emitting diode) automatic synchronous stroboscopic device and control method thereof Download PDFInfo
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- CN104254179A CN104254179A CN201410445221.XA CN201410445221A CN104254179A CN 104254179 A CN104254179 A CN 104254179A CN 201410445221 A CN201410445221 A CN 201410445221A CN 104254179 A CN104254179 A CN 104254179A
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Abstract
The invention relates to an LED (light emitting diode) automatic synchronous stroboscopic device and a control method of the LED automatic synchronous stroboscopic device. The automatic synchronous stroboscopic device comprises a rotary encoder, an LED stroboscopic lamp and a controller, wherein the controller comprises a power supply module, a MCU (microprogrammed control unit) module, an input interface and an output interface, the MCU module comprises a single chip microcomputer and a peripheral circuit, the rotary encoder is connected with an external interruption pin of the single chip microcomputer through the input interface, an I/O (input/output) pin of the single chip microcomputer is connected with the LED stroboscopic lamp through the output interface, and the MCU module and the LED stroboscopic lamp are respectively connected with the power supply module. According to the device, external interruption of the single chip microcomputer is automatically trigged through Z signals of the rotary encoder, and then, the stroboscopic function is realized through turning on and turning off an LED lamp by the single chip microcomputer. The LED automatic synchronous stroboscopic device and the control method of the LED automatic synchronous stroboscopic device have the advantages that the flashing frequency is automatically regulated, the synchronous stability is good, and the observation effect is good.
Description
Technical field
The present invention relates to LED strobe apparatus and the control method thereof of the quality for detecting printed matter image.
Background technology
In printing process, in order to detect the quality of the printed matter image of High Speed Transfer, the mode of the printed matter image in usual employing strobe apparatus instant igniting illumination motion realizes, and LED has the advantages such as the simple and long service life of sturdy and durable, low in energy consumption, drive circuit, it is the more satisfactory luminous element as strobe apparatus.Strobe apparatus on printing press utilizes the principle of visual persistence phenomenon to arrange the flashing rate of strobe apparatus, the transfer rate of such as printed matter is 300CM each second, and the length of every width pattern is 10CM, namely 30 width patterns are flow through each second, the flashing rate of adjustment strobe apparatus is glisten each second 30 times, that is between twice of strobe apparatus adjacent flash of light, just 1 width pattern is flow through, and every width pattern is all the same, the same position in identical patterns all beaten by the photoflash lamp of such strobe apparatus at every turn, although make printed matter High Speed Transfer, but look similarly to be slowly move or geo-stationary, the simultaneous observation of the printed matter image of High Speed Transfer can be realized, this visual persistence phenomenon can make printer clearly observe current printed matter picture quality situation.
The patent No. is the Chinese utility model patent of ZL200620041431.3; disclose the light-emitting diode stroboscopic lamp for detecting printed matter picture quality and drive circuit thereof; as shown in Figure 1 and Figure 2; in order to realize the stroboscopic function of light-emitting diode, comprise for the drive circuit controlling this light-emitting diode stroboscopic lamp: frequency adjustment circuit 21, pulse shaping circuit 22, voltage conversion circuit 23, ON-OFF control circuit 24 and protective circuit 25.This drive circuit adopts the implementation of pure hardware, and the adjustment of its frequency is manually pressed or sprung push buttons S1, unlatching or closing switch S2 and regulate the resistance of potentiometer W to realize.
The problem of prior art is: the flashing rate of LED strobe apparatus adopts manual adjustments, and in actual mechanical process, manual adjustments is often difficult to guarantee and adjusts to flashing rate accurately, and the stability of synchronization is poor, and observation effect is not good.
In prior art figure: 21-frequency adjustment circuit, 22-pulse shaping circuit, 23-voltage conversion circuit, 24-ON-OFF control circuit, 25-protective circuit, S1-button, S2-button, W-potentiometer.
In figure of the present invention: 1-LED stroboscopic lamp, 2-installing rack, 3-rotary encoder, 4-MCU module, 5-power module, 6-input interface, 7-output interface, 8-photoelectrical coupler, 9-triode, 10-key-press module, 11-rotary encoder Z signal, 12-chromatography probe bracket, 13-printed matter, 14-printing plate cylinder, 15-roller drive motors, 16-three-terminal voltage-stabilizing chip, 17-single-chip microcomputer.
Summary of the invention
The technical problem to be solved in the present invention is, provides the LED strobe apparatus that a kind of flashing rate regulates automatically, the stability of synchronization is good, observation effect is good.
Technical solution of the present invention is, a kind of LED automatic synchronization strobe apparatus is provided, it is characterized in that: comprise rotary encoder, LED stroboscopic lamp and controller, described controller comprises power module, MCU module, input interface and output interface, MCU module comprises single-chip microcomputer and peripheral circuit, rotary encoder is connected with single-chip microcomputer external interrupt pin by input interface, the I/O pin of single-chip microcomputer is connected with LED stroboscopic lamp by output interface, and MCU module is all connected with power module with LED stroboscopic lamp.
The present invention has the following advantages:
The flashing rate source of this strobe apparatus is rotary encoder Z signal, motor often turns around through initial point, rotary encoder just sends a Z signal, motor often turns around and drives printing plate cylinder to turn around, and printing plate cylinder turns around and just pulls out a width pattern, flows through a width pattern between twice Z signal of such rotary encoder, and rotary encoder Z signal automatically triggers, overcome the defect that manual adjustments frequency can produce error, the stability of synchronization is good, and observation effect is good.
As further setting, described LED stroboscopic lamp comprises multiple LED, multiple LED connection in series-parallel composition LED dot matrix.Arranging LED dot matrix makes light source stronger, is conducive to the observation of printed matter image.
As further setting, described controller also comprises key-press module, and key-press module comprises and the ON/OFF button of LED stroboscopic lamp, exposure position moves button and exposure position moves down button, the time for exposure adds button and the time for exposure subtracts button.Above-mentioned button is set, can needs to open or close LED stroboscopic lamp, adjustment exposure position and time for exposure according to user.
Another technical problem that the present invention will solve is, provides a kind of control method of the LED automatic synchronization strobe apparatus using rotary encoder Z signal as frequency source.
Another technical solution of the present invention is, provide a kind of control method of LED automatic synchronization strobe apparatus, it comprises the following steps:
(1) detect input interface signal, this input interface signal is rotary encoder Z signal, if rotary encoder Z signal detected, then enters step (2), if not, then returns step (1) and again detects;
(2) described encoder Z signal triggers single-chip microcomputer external interrupt, and single-chip microcomputer starts internal delay time program, starts timing;
(3) judge whether delay time arrives the time needed for exposure position, if so, then enter step (4), if not, then return step (3) and rejudge;
(4) delay procedure terminates, lightening LED lamp;
(5) single-chip microcomputer restarts internal delay time program;
(6) judge whether delay time arrives the time for exposure of setting, if so, then enter step (7), if not, then return step (6) and rejudge;
(7) delay procedure terminates, and closes LED;
(8) step (1) is returned;
As further setting, after step (3) judges the time that delay time does not arrive needed for exposure position, also to judge exposure position moves button or exposure position to move down button and whether be pressed, if, just return step (3) after also will adjusting the time arrived needed for exposure position to rejudge, if not, then directly return step (3) to rejudge.This is arranged so that the time arrived needed for exposure position can be adjusted.
As further setting, before lightening LED lamp, also will judge the state of the ON/OFF button of LED stroboscopic lamp, if the ON button of LED stroboscopic lamp is pressed, then lightening LED lamp, if not, then returns step (1).This is arranged so that LED only has in working order and just can be lit.
As further setting, after step (6) judges the time for exposure that delay time does not arrive setting, also to judge that the time for exposure adds button or time for exposure and subtracts button and whether be pressed, if, just return step (6) after also will adjusting the set point of time for exposure to rejudge, if not, then directly return step (6) to rejudge.This is arranged so that the time for exposure can be adjusted.
Accompanying drawing illustrates:
Fig. 1 is the drive circuit block diagram of existing LED stroboscopic lamp;
Fig. 2 is the driving circuit principle figure of existing LED stroboscopic lamp;
Fig. 3 is scheme of installation of the present invention;
Fig. 4 is functional-block diagram of the present invention
Fig. 5 is electrical schematic diagram of the present invention;
Fig. 6 is control flow chart of the present invention;
Embodiment
Below in conjunction with accompanying drawing, and the present invention is described further in conjunction with the embodiments.
Embodiment:
As Fig. 3, shown in Fig. 4, this LED automatic synchronization strobe apparatus comprises rotary encoder 3, LED stroboscopic lamp 1 and controller, described controller comprises power module 5, MCU module 4, input interface 6 and output interface 7, chromatography probe bracket 12 is provided with the installing rack 2 that can move left and right, LED stroboscopic lamp 1 and controller to be fixed on installing rack 2 and can to move left and right on chromatography probe bracket 12, realize the location to the horizontal observation place of printed matter 13, printing plate cylinder 14 is driven by roller drive motors 15, roller drive motors 15 is with rotary encoder 3, roller drive motors 15 often revolves and turns around through origin position, rotary encoder 3 all can trigger motor initial point signal and encoder Z signal 11 automatically, roller drive motors 15 rotates an astragal and moves printing plate cylinder 14 and revolve and turn around, the origin position of such roller drive motors 15 is just corresponding with the origin position of printing plate cylinder 14, namely rotary encoder 3 can the origin position of Real-time Feedback printing plate cylinder 14, and printing plate cylinder 14 often turns around and can pull out a width pattern, a width pattern is flow through between twice Z signal of such rotary encoder, that is between twice of LED stroboscopic lamp 1 adjacent flash of light, printing press flows through just a width pattern, and the image of every width pattern is all the same, the same position in identical patterns all beaten by so each photoflash lamp, although make printed matter 13 High Speed Transfer, but look similarly to be slowly move or geo-stationary, this visual persistence phenomenon can make printer clearly observe current printed matter picture quality situation, achieve automatic synchronization stroboscopic function truly.
As described in Figure 5, MCU module 4 comprises single-chip microcomputer 17 and peripheral circuit, single-chip microcomputer 17 model is 80C2051, the peripheral circuit of single-chip microcomputer 17 comprises crystal oscillating circuit and reset circuit, rotary encoder Z signal 11 is received input interface 6 and is connected with the external interrupt pin P3.2 of single-chip microcomputer 17 by photoelectrical coupler 8, photoelectrical coupler 8 buffer actions, the interference between the superior and the subordinate's circuit can be avoided, be connected with LED stroboscopic lamp 1 after the I/O pin P1.0 of single-chip microcomputer 17 receives output interface 7 by triode 9, triode 9 electrifies and flows amplification, the load-carrying ability of output can be improved, for driving LED dot matrix, MCU module 4 is all connected with power module 5 with LED stroboscopic lamp 1, power module 5 comprises the three-terminal voltage-stabilizing chip 16 and filter capacitor that model is L7805CV, for MCU module 4 and LED stroboscopic lamp 1 provide different operating voltages.
After adopting the LED automatic synchronization strobe apparatus of said structure, using rotary encoder Z signal 11 as the frequency source of this strobe apparatus, rotary encoder Z signal 11 automatically triggers, and eliminates the defect that manual adjustments frequency can produce error, accurately achieve automatic synchronization stroboscopic function.
As further setting, described LED stroboscopic lamp 1 comprises multiple LED, multiple LED connection in series-parallel composition LED dot matrix.Arranging LED dot matrix makes light source stronger, is conducive to the observation of printed matter image.
As further setting, described controller also comprises key-press module 10, and key-press module 10 comprises and the ON/OFF button of LED stroboscopic lamp 1, exposure position moves button and exposure position moves down button, the time for exposure adds button and the time for exposure subtracts button.The ON button of LED stroboscopic lamp 1 is pressed, show that LED stroboscopic lamp 1 is in running order, the I/O pin P1.0 of single-chip microcomputer can be utilized to control LED, the OFF button of LED stroboscopic lamp 1 is pressed, show that LED stroboscopic lamp 1 is in off position, the I/O pin P1.0 of single-chip microcomputer cannot be used to control LED, so just can need to open or close LED stroboscopic lamp 1 according to user, exposure position moves button and exposure position moves down button for adjusting exposure position, the time for exposure adds button and the time for exposure subtracts button for adjusting the time for exposure.
As shown in Figure 6, the control method that a kind of LED automatic synchronization strobe apparatus is also provided of the present invention, it comprises the following steps:
(1) detect input interface signal, this input interface signal is rotary encoder Z signal, if rotary encoder Z signal detected, then enters step (2), if not, then returns step (1) and again detects;
(2) described rotary encoder Z signal triggers single-chip microcomputer external interrupt, and single-chip microcomputer starts internal delay time program, starts timing;
(3) judge whether delay time arrives the time needed for exposure position, if so, then enter step (4), if not, then return step (3) and rejudge;
(4) delay procedure terminates, lightening LED lamp;
(5) single-chip microcomputer restarts delay procedure;
(6) judge whether delay time arrives the time for exposure of setting, if so, then enter step (7), if not, then return step (6) and rejudge;
(7) delay procedure terminates, and closes LED;
(8) step (1) is returned;
The above-mentioned time needed for arrival exposure position refers to, when rotary encoder Z signal 11 feeds back the initial point signal of printing plate cylinder 14, it is the initial position of a width pattern, now rotary encoder Z signal 11 triggers the external interrupt pin P3.2 of single-chip microcomputer 17, but now LED stroboscopic lamp 1 is not also lighted, single-chip microcomputer 17 starts timer internal and starts timing, LED stroboscopic lamp 1 is just lighted after time delay a period of time, now the position of LED stroboscopic lamp 1 dozen on this width pattern is called as exposure position, the time arrived needed for exposure position is called to exposure position institute elapsed time by the initial position of this width pattern.
As further setting, after step (3) judges the time that delay time does not arrive needed for exposure position, also to judge exposure position to move button or move down button whether be pressed, if, just return step (3) after also will adjusting the time arrived needed for exposure position to rejudge, if not, then directly return step (3) to rejudge.This is arranged so that the time arrived needed for exposure position can be adjusted.
As further setting, before lightening LED lamp, also will judge the state of the ON/OFF button of LED stroboscopic lamp, if the ON button of LED stroboscopic lamp is pressed, then lightening LED lamp, if not, then returns step (1).This is arranged so that LED only has in working order and just can be lit.
As further setting, after step (6) judges the time for exposure that delay time does not arrive setting, also to judge that the time for exposure adds button or time for exposure and subtracts button and whether be pressed, if, just return step (6) after also will adjusting the set point of time for exposure to rejudge, if not, then directly return step (6) to rejudge.This is arranged so that the time for exposure can be adjusted.
Claims (7)
1. a LED automatic synchronization strobe apparatus, it is characterized in that: comprise rotary encoder (3), LED stroboscopic lamp (1) and controller, described controller comprises power module (5), MCU module (4), input interface (6) and output interface (7), MCU module (4) comprises single-chip microcomputer (17) and peripheral circuit, rotary encoder (3) is connected with single-chip microcomputer (17) external interrupt pin by input interface (6), the I/O pin of single-chip microcomputer (17) is connected with LED stroboscopic lamp (1) by output interface (7), MCU module (4) is all connected with power module (5) with LED stroboscopic lamp (1).
2. a kind of LED automatic synchronization strobe apparatus according to claim 1, is characterized in that: described LED stroboscopic lamp (1) comprises multiple LED, multiple LED connection in series-parallel composition LED dot matrix.
3. a kind of LED automatic synchronization strobe apparatus according to claim 1, it is characterized in that: described controller also comprises key-press module (10), key-press module (10) comprises and the ON/OFF button of LED stroboscopic lamp, exposure position moves button and exposure position moves down button, the time for exposure adds button and the time for exposure subtracts button.
4. a control method for LED automatic synchronization strobe apparatus, it comprises the following steps:
(1) detect input interface signal, this input interface signal is rotary encoder Z signal, if rotary encoder Z signal detected, then enters step (2), if not, then returns step (1) and again detects;
(2) described rotary encoder Z signal triggers single-chip microcomputer external interrupt, and single-chip microcomputer starts internal delay time program, starts timing;
(3) judge whether delay time arrives the time needed for exposure position, if so, then enter step (4), if not, then return step (3) and rejudge;
(4) delay procedure terminates, lightening LED lamp;
(5) single-chip microcomputer restarts internal delay time program;
(6) judge whether delay time arrives the time for exposure of setting, if so, then enter step (7), if not, then return step (6) and rejudge;
(7) delay procedure terminates, and closes LED;
(8) step (1) is returned.
5. the control method of a kind of LED automatic synchronization strobe apparatus according to claim 4, it is characterized in that: after step (3) judges the time that delay time does not arrive needed for exposure position, also to judge exposure position moves button or exposure position to move down button and whether be pressed, if, just return step (3) after also will adjusting the time arrived needed for exposure position to rejudge, if not, then directly return step (3) to rejudge.
6. the control method of a kind of LED automatic synchronization strobe apparatus according to claim 4, it is characterized in that: before step (4) lightening LED lamp, also to judge the state of the ON/OFF button of LED stroboscopic lamp, if the ON button of LED stroboscopic lamp is pressed, then lightening LED lamp, if not, then step (1) is returned.
7. the control method of a kind of LED automatic synchronization strobe apparatus according to claim 4, it is characterized in that: after step (6) judges the time for exposure that delay time does not arrive setting, also to judge that the time for exposure adds button or time for exposure and subtracts button and whether be pressed, if, just return step (6) after also will adjusting the set point of time for exposure to rejudge, if not, then directly return step (6) to rejudge.
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| CN104703354A (en) * | 2015-03-18 | 2015-06-10 | 上海镭芯微电子有限公司 | LED stroboscope lamp control system with automatic frequency-ascending and state-control functions and control method thereof |
| CN106658859A (en) * | 2017-01-09 | 2017-05-10 | 万长林 | High-precision LED frequency modulation system and LED frequency modulation lamp |
| WO2018126751A1 (en) * | 2017-01-09 | 2018-07-12 | 万长林 | High-precision led frequency modulation system and led frequency modulation light |
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