CN102984867B - Photoinduction flash triggering device and flash triggering method - Google Patents

Photoinduction flash triggering device and flash triggering method Download PDF

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Publication number
CN102984867B
CN102984867B CN201210546814.6A CN201210546814A CN102984867B CN 102984867 B CN102984867 B CN 102984867B CN 201210546814 A CN201210546814 A CN 201210546814A CN 102984867 B CN102984867 B CN 102984867B
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circuit
photoinduction
triggering
flash
capacitive device
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CN102984867A (en
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许野平
赵爱波
方亮
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Synthesis Electronic Technology Co Ltd
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SHANDONG SYNTHESIS ELECTRONIC TECHNOLOGY Co Ltd
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Abstract

The invention discloses a photoinduction flash triggering device and a flash triggering method. The photoinduction flash triggering device comprises a photoinduction circuit, an integral circuit and a triggering circuit, wherein the photoinduction circuit is used for inducing flash of preset intensity; the integral circuit is in input connection with the photoinduction circuit, charges a capacitance device of the photoinduction circuit and sends a setting signal when the capacitance device is charged to preset electric quantity; the triggering circuit is in input connection with the integral circuit; and when the integral circuit outputs the setting signal, the triggering circuit generates a triggering signal to trigger objective flashing equipment. According to the triggering device and the triggering method, photoinduction flash triggering is realized by a simple simulation circuit, the cost is low, and popularization and application are further facilitated.

Description

Photoinduction is drawn sudden strain of a muscle device and is drawn sudden strain of a muscle method
Technical field
The present invention relates to a kind of photoinduction draw sudden strain of a muscle device and draw sudden strain of a muscle method, belong to camera technical field.
Background technology
The effect of dodging device is drawn in photoinduction, and when photograph owner flash fire, the flashing light utilizing main photoflash lamp to send, triggers the flash of light of other flash sync.
There is the functions such as pre flashing of flash lamp light-metering, IGBT due to present camera, cause before formal flash photographing, photograph owner photoflash lamp can produce repeatedly pre-flash.Old-fashioned light sensation draws and dodges device and just to flash signal when camera first time flash of light, causes the photoflash lamp be triggered to glisten in advance, affects shooting effect.
For coordinating camera to realize correct trigger flashing, flash synchronization device must send triggering signal when photograph owner photoflash lamp glistens for the last time.The photograph owner pre flashing of flash lamp number of times of method normally by pre-setting of current head it off, makes device correctly can judge the opportunity of trigger flashing flick of lamp.
It take microprocessor as the implementation method of core that it " a kind of digital camera intelligent radio synchronizer " (Authorization Notice No. is CN 2632582Y) of Chinese utility model patent provides a kind of, realizes the triggering synchronous flashing light when photograph owner photoflash lamp glistens for the last time.
It take governor circuit as the implementation method of core that Chinese invention patent application open " a kind of synchroflash draw dodge mode control method and device " (publication number CN 101321425A) provides a kind of, this implementation method, by performing the governor circuit of " procedure code ", realizes the triggering synchronous flashing light when photograph owner photoflash lamp glistens for the last time.
Said method institute configuring hardware circuit realizes all more complicated, high expensive.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of lower-cost photoinduction to draw sudden strain of a muscle device, propose that sudden strain of a muscle method is drawn in a kind of photoinduction simultaneously.
According to one aspect of the present invention, sudden strain of a muscle device is drawn in a kind of photoinduction, comprising:
Photoinduction circuit, for responding to the flash of light of predetermined strength;
Integrating circuit, input connects described photoinduction circuit, to charge to its capacitive device, thus when capacitive device is flushed to predetermined electricity, sends asserts signal; And
Circuits for triggering, input connects described integrating circuit, to produce when integrating circuit exports asserts signal the triggering signal being used for trigger target flash unit.
Sudden strain of a muscle device is drawn in above-mentioned photoinduction, in certain embodiments, also comprises and is connected to described circuits for triggering input, arranges circuit with what adjust trigger circuit triggers current potential.
Preferably, described the emitter variable resistor that circuit structure is the first transistor is set, and this variable resistor and described capacitive device are altogether with reference to ground, and another termination input signal of described capacitive device is connected to the base stage of described the first transistor; Wherein, the emitter of described the first transistor is also connected to and belongs to described and arrange circuit and be connected to the resistance of reference voltage circuit.
Sudden strain of a muscle device is drawn in above-mentioned photoinduction, described photoinduction circuit is a photo resistance, correspondingly, described integrating circuit comprises transistor seconds, described photo resistance string has a resistance and common port connects the base stage of described transistor seconds, the circuit unit that photo resistance simultaneously and institute's series resistor are formed be connected to reference to and reference voltage circuit between;
And between the collector electrode of described transistor seconds and described reference voltage circuit, be connected with a resistance, and be connected to an output resistance at both common ports.
Sudden strain of a muscle device is drawn in above-mentioned photoinduction, and the emitter of described transistor seconds is connect with reference to ground by a resistance.
Sudden strain of a muscle device is drawn in above-mentioned photoinduction, and described output resistance is exported by a diode.
According to another aspect of the present invention, sudden strain of a muscle method is drawn in a kind of photoinduction, comprises the following steps:
Respond to main flash of light to the capacitive device charging connecing integrating circuit after the photoinduction circuit for responding to main flash of light, and after predetermined charging, capacitive device voltage reaches set point, and drives circuits for triggering set, exports and triggers by synchronous flash unit.
Sudden strain of a muscle method is drawn in above-mentioned photoinduction, and the setting voltage of described capacitive device passes through and the variable resistor connect sets, thus main sudden strain of a muscle number of times adjustment capacitive device as required hold power with matching voltage.
Can be found out by above technical scheme, according to the present invention, realize photoinduction by simple analog circuit and draw sudden strain of a muscle, cost is low, is more conducive to apply.
Consider more detailed description by reference to the accompanying drawings, above-mentioned and other object of the present invention and advantage will be more apparent.
Accompanying drawing explanation
Fig. 1 draws according to a kind of photoinduction of the present invention the theory diagram dodging device.
Fig. 2 draws according to a kind of photoinduction of present pre-ferred embodiments the electrical schematic diagram dodging device.
Embodiment
Herein based on the consideration of cost, adopt the trigger flashing synchronizing signal that structure is simple, cause cheap analog circuit correct.
Fig. 1 gives the circuit theory realizing above-mentioned purpose, flashing light x, signal x1 is produced by photoinduction circuit A, drive integrating circuit B, produce integrated value x2, export flip-flop circuit F to, circuits for triggering F shows as a comparison circuit, by setting two input values of circuits for triggering, export triggering signal z.Another input value wherein, can set, thus, number of times control can be carried out effectively to flashing light, under predetermined times condition, produce triggering signal z.
According to said structure, relatively simple for structure, cost of manufacture is lower.
In the construction shown in fig. 1, draw sudden strain of a muscle device and comprise photoelectric sensor circuit A, for responding to the flash of light of predetermined strength, mate the flash intensity of main flash of light, only in this way could effectively avoid interference, in the structure shown in Fig. 2, by photo resistance R2 generation current, the cut-ff voltage of matching transistor Q1 realizes, and effectively can avoid the interference of external light source.
In the circuit of some relative complex, photosensitive threshold value can be set, thus under main sudden strain of a muscle condition, send a pulse, pulse count, after reaching predetermined number of times, produce triggering signal.
Configuration integrating circuit B, input connects described photoelectric sensor circuit A, integrating circuit contains capacitive device, general is all electric capacity, to capacitor charging, electric capacity two sections of voltages raise, under the power-carrying condition of electric capacity, the signal input of x1 each time, electric capacity is just charged once, until integrating circuit action, send asserts signal, the integrated value x2 namely shown in Fig. 1, trigger F shows as comparator, so adjust integral threshold and arrange the threshold value that circuit C just can set up trigger set, the voltage of matching capacitance is arranged.Job step is as follows:
1, camera " flashing light x " passes through " photoelectric sensor circuit A " and accepts and produce signal x1 and transport to " integrating circuit B ".
The integrated value x2 of signal exports to " circuits for triggering F " by " integrating circuit B ".
" integral threshold y " is arranged by " integral threshold arranges circuit C ", and exports threshold signal y2 to " circuits for triggering F "." circuits for triggering F " a pair signal to input compares, and when signal x2 is greater than y1, exports " triggering signal z ".
1-1, according to 1, as shown in Figure 2, device is made up of triode Q1, Q2, diode L1, resistance R1, R3, R4, R5, variable resistor R6, photo resistance R2, resistance R7, R8, electric capacity C1, optical coupler U1, entirety only needs several resistance and two triodes, an electric capacity and an optical coupler are formed, structure is simple, and cost is lower.
Resistance R1 one end connects positive source, other end connecting triode Q1 base stage; Photo resistance R2 one end connecting triode Q1 base stage, another termination is with reference to ground, thus, when photo resistance R2 is photosensitive, triode Q1 base potential can change, the selection of build-out resistor R1 and photo resistance, can produce the base potential that I needs, with under the condition of the main sudden strain of a muscle of induction, triode Q1 ends;
Resistance R3 mono-termination positive source, another termination triode Q1 collector electrode; Resistance R4 mono-termination triode Q1 emitter, other end ground connection, thus resistance R4 produces emitter current potential, makes the change of triode to temperature insensitive, improves the adaptability to environment.Resistance R3 then for determining the collector potential of triode Q1, thus when triode Q1 ends, when namely photosensitive intensity reaches predetermined value, another circuit behavior containing R3.
Resistance R5 mono-termination triode Q1 collector electrode, another terminating diode L1 positive pole, the diode L1 other end is via electric capacity C1 ground connection; Wherein diode L1 is for leaching the clutter in front stage circuits.
Electric capacity C1 both end voltage is the base potential of triode Q2, and variable resistor R6 mono-termination triode Q2 emitter, another termination are with reference to ground, thus set up the emitter current potential of triode Q2, the conducting of triode Q2 can trigger optical coupler U1, obviously variable resistor R6 determines the charge volume of electric capacity C1 herein, adjusts the maximum charge amount that have adjusted electric capacity C1 of then mating by it.
Most electric capacity C1 preferably adopts electrochemical capacitor, and Capacity Ratio is comparatively large, has very large adjustment space, predictably, mates different application, can increase electricity capacity in some applications by the mode of serial capacitance.
Resistance R7 mono-termination triode Q2 emitter, another termination positive source, provide a bias voltage; Resistance R8 mono-termination positive source, one end of another termination optical coupling U1; Diode L1 negative pole connects triode Q2 base stage; Electrochemical capacitor C1 positive pole connects diode L1 negative pole, minus earth; The 1 termination power positive pole of optical coupler U1,2 termination triode Q2 collector electrodes.
Thus when triode Q2 conducting, optical coupler U1 conducting, produces triggering signal z.
In such a configuration, if the time that device exports triggering signal shifts to an earlier date than orthochronous, the numerical value of " y-integral threshold " is improved.
In addition accordingly, the value increasing variable resistor R6 can improve the numerical value of " y-integral threshold ".
Relatively, if device can not export triggering signal, reduce the numerical value of " y-integral threshold ".
In addition accordingly, the value reducing variable resistor R6 can reduce the numerical value of " y-integral threshold ".
Content from above: the value increasing variable resistor R6 can improve the numerical value of " y-integral threshold "; The value reducing variable resistor R6 can reduce the numerical value of " y-integral threshold ".

Claims (3)

1. a sudden strain of a muscle device is drawn in photoinduction, it is characterized in that, comprising:
Photoinduction circuit, for responding to the flash of light of predetermined strength;
Integrating circuit, input connects described photoinduction circuit, to charge to its capacitive device, thus when capacitive device is charged to predetermined electricity, sends asserts signal;
Circuits for triggering, input connects described integrating circuit, to produce when integrating circuit exports asserts signal the triggering signal being used for trigger target flash unit; And
Circuit is set, is connected to the input of described circuits for triggering, to adjust trigger circuit triggers current potential;
Wherein, the described circuit structure that arranges is the variable resistor be connected with the emitter of the first transistor, and this variable resistor and described capacitive device are altogether with reference to ground, and another termination input signal of described capacitive device is connected to the base stage of described the first transistor; Wherein, the emitter of described the first transistor is also connected to and belongs to described and arrange circuit and be connected to the resistance of reference voltage circuit; The collector electrode linking objective flash unit of the first transistor.
2. a sudden strain of a muscle method is drawn in photoinduction, it is characterized in that, comprises the following steps:
Respond to main flash of light to the capacitive device charging connecing integrating circuit after the photoinduction circuit for responding to main flash of light, and after predetermined charging, capacitive device voltage reaches set point, and drives circuits for triggering set, exports and triggers by synchronous flash unit.
3. sudden strain of a muscle method is drawn in photoinduction according to claim 2, it is characterized in that, the setting voltage of described capacitive device passes through and the variable resistor connect sets, thus main sudden strain of a muscle number of times adjustment capacitive device as required holds power with matching voltage.
CN201210546814.6A 2012-12-17 2012-12-17 Photoinduction flash triggering device and flash triggering method Active CN102984867B (en)

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Application Number Priority Date Filing Date Title
CN201210546814.6A CN102984867B (en) 2012-12-17 2012-12-17 Photoinduction flash triggering device and flash triggering method

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CN102984867B true CN102984867B (en) 2015-04-15

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2037917U (en) * 1988-02-26 1989-05-17 梁越 Flash synchronizer
CN2158583Y (en) * 1993-01-16 1994-03-09 王伟夫 Automatic delay and timing socket
CN1606398A (en) * 2003-10-08 2005-04-13 英保达股份有限公司 Automatic regulating flash light circuit
JP2010206168A (en) * 2009-02-03 2010-09-16 Rohm Co Ltd Photodetector, object detector using same, and disc device
CN202118842U (en) * 2011-06-10 2012-01-18 上海市金山区青少年活动中心 Infrared optical-control combination lighting circuit
CN203057617U (en) * 2012-12-17 2013-07-10 山东神思电子技术股份有限公司 Photo-induction flash guiding device

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Address after: Shun high tech Zone of Ji'nan City, Shandong province 250101 China West Road No. 699

Patentee after: SYNTHESIS ELECTRONIC TECHNOLOGY CO., LTD.

Address before: Shun high tech Zone of Ji'nan City, Shandong province 250101 China West Road No. 699

Patentee before: Shandong Synthesis Electronic Technology Co., Ltd.