CN102540642B - Digital flash lamp and method for controlling flashing of digital flash lamp - Google Patents
Digital flash lamp and method for controlling flashing of digital flash lamp Download PDFInfo
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- CN102540642B CN102540642B CN201010581957.1A CN201010581957A CN102540642B CN 102540642 B CN102540642 B CN 102540642B CN 201010581957 A CN201010581957 A CN 201010581957A CN 102540642 B CN102540642 B CN 102540642B
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- 238000000034 method Methods 0.000 title description 9
- 229910052724 xenon Inorganic materials 0.000 claims abstract description 60
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000007600 charging Methods 0.000 claims abstract description 48
- 239000003990 capacitor Substances 0.000 claims abstract description 10
- 230000001960 triggered effect Effects 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
The invention belongs to the field of intelligent monitoring and discloses a digital flash lamp which comprises a charging device, a trigger device, a xenon flash tube and a microprocessor. The microprocessor is used for controlling the charging device to charge the xenon flash tube and controlling the trigger device to trigger the xenon flash tube, the charging device is connected with the trigger device to charge the trigger device to reach preset voltage, and the charging device comprises a voltage doubling rectifying circuit, a main capacity assembly and a capacity protection circuit. The voltage doubling rectifying circuit can convert alternating voltage into first direct-current voltage, and the capacity protection circuit can charge the main capacity assembly to enable voltage of the main capacity assembly to be second voltage. The trigger device comprises a trigger capacitor, voltage at two ends of the trigger capacitor serves as third voltage, the first voltage is larger than the second voltage, and the second voltage is larger than the third voltage. The digital flash lamp greatly improves charging voltage, further improves charging efficiency and can achieve the effect of quick charging.
Description
Technical field
The invention belongs to field of intelligent monitoring, relate to the camera arrangement in a kind of intelligent transportation, in particular, relate to a kind of digital flashlamp.
Background technology
Most flashlamp (Xenon Photoflash) of xenon pattern that use are made up of the main capacitance of the enough energy of storage, triggering electric capacity and trigger winding at present.When triggering, trigger capacitor discharge at the secondary formation high pressure of trigger winding, the inert gas in fluorescent tube is punctured, then main capacitance is released into fluorescent tube by its energy, and this energy can excite xenon and produce light source in fluorescent tube.Because the required energy of trigger flashing lamp is to be stored and provided by main capacitance, when the voltage of main capacitance must reach certain value, flashlamp could trigger, in the time that the charge capacity of main capacitance is not enough, corresponding undertension, just cannot trigger flashing lamp, thus charging rate is slow, the duration of charging and the triggered time also unstable.
Therefore, conventional flash lamp is because charging rate is slow, and the time of trigger flashing can not be accurately controlled, can not well be applied to the intelligent transportation occasions such as public security bayonet, electronic police, overspeed snapping.Meanwhile, flash of light energy output is inhomogeneous, more causes the shortcomings such as short, poor anti jamming capability of life-span.
Summary of the invention
In order to solve, in prior art, flashlight charging speed is slow, the duration of charging long and unsettled problem of triggered time, the invention provides a kind of digital flashlamp, comprise charging device, flip flop equipment, xenon flash tube and microprocessor, wherein, described in described microprocessor control, charging device charges to described xenon flash tube, controls described flip flop equipment described xenon flash tube is triggered; Described charging device connects described flip flop equipment it is charged to reach predetermined voltage; Described charging device comprises voltage doubling rectifing circuit, main capacitance assembly and electric capacity holding circuit, described voltage doubling rectifing circuit is converted to alternating voltage the first voltage of direct current, by described electric capacity holding circuit, described main capacitance assembly is charged, making described main capacitance component voltage is second voltage; Described flip flop equipment comprises triggering electric capacity, and the voltage that triggers electric capacity two ends is tertiary voltage; Described the first voltage is greater than second voltage, second voltage is greater than tertiary voltage.
Preferably, described main capacitance assembly is formed in parallel by multiple independent capacitances.
Preferably; described microprocessor is exported corresponding negative pulse in the triggered time, controls described triggering capacitor discharge to puncture the xenon in described xenon flash tube, simultaneously; described main capacitance assembly makes described xenon flash tube electric discharge by described electric capacity holding circuit, forms flash of light.
Preferably, described electric capacity holding circuit also comprises that performance number is greater than high-power resistance and first insulated gate bipolar transistor of predetermined threshold; The power supply high-pressure side of described formation the first voltage is connected to the source electrode of described the first insulated gate bipolar transistor by described high-power resistance, the positive pole of described main capacitance assembly is connected to the positive pole of described the first insulated gate bipolar transistor, and the negative pole of described main capacitance assembly is connected to the power supply low pressure end that forms described the first voltage.
Preferably, described electric capacity holding circuit also comprises the first dividing potential drop branch road, voltage acquisition feedback circuit and the first optocoupler; Described voltage acquisition feedback circuit comprises first input end, the first output terminal and the second output terminal; Described the first dividing potential drop branch circuit parallel connection, to described main capacitance assembly, comprises the first resistance, the second resistance and the 3rd resistance of series connection, and the high-pressure side of the dividing potential drop of described the first resistance and the second resistance gained is connected to the first input end of described voltage acquisition feedback circuit; The second output terminal of described voltage acquisition feedback circuit is connected to the negative-phase input of described the first optocoupler; Described microprocessor comprises external interrupt input port, is connected to the positive output end of described the first optocoupler.
Preferably, described the first resistance is potentiometer.
Preferably, described voltage acquisition feedback circuit is N-channel MOS pipe, and described first input end is grid, and described the first output terminal is source electrode, and described the second output terminal is drain electrode.
Preferably, described voltage acquisition feedback circuit is transistor circuit or voltage comparator circuit.
Preferably, the two ends of described main capacitance assembly are also parallel with the second dividing potential drop branch road, and described the second dividing potential drop branch road is got tertiary voltage, as the voltage after described triggering capacitor charging.
Preferably, described the first voltage is between 550 volts to 650 volts, and described second voltage is between 385 volts to 485 volts, and described tertiary voltage is between 210 volts to 310 volts; And described predetermined threshold is 50W.
The present invention also proposes a kind of method of control figure flashlamp flash of light, comprises the following steps:
Microprocessor receives outside trigger pip;
Receive after outside trigger pip at microprocessor, calculate xenon flash tube flash of light energy per second according to flash time;
Judge whether above-mentioned amount of flash per second exceedes the given maximum flash of light energy of xenon flash tube;
If described amount of flash per second exceedes the given maximum of xenon flash tube flash of light energy, microprocessor is response external trigger pip no longer, makes xenon flash tube enter guard mode, to prevent that xenon flash tube from burning;
If described amount of flash per second does not exceed the given maximum flash of light energy of xenon flash tube, microprocessor responds outer triggering signal glistens the xenon ionization in xenon flash tube.
Preferably, in the time having continuous high frequency undesired signal, described microprocessor sends order to the main frame of controlling described flashlamp and reports an error.
Digital flashlamp proposed by the invention; by voltage doubling rectifing circuit and electric capacity holding circuit; improve greatly the charging voltage of main capacitance assembly; and then improve charge efficiency, reached rapid charge effect; and make the trigger flashing time become accurately controlled, can be effectively applied to the intelligent transportation occasions such as public security bayonet, electronic police, overspeed snapping.And control structure of the present invention is simple, hardware controls reliability is high, without AD conversion, reaction velocity is fast, cost is low, meanwhile, has the output of flash of light energy evenly, the feature that the life-span is long, antijamming capability is strong.
Accompanying drawing explanation
Reader, after reading the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein:
Fig. 1 is the structured flowchart of the present invention's numeral flashlamp;
Fig. 2 is the structured flowchart of another embodiment in the present invention's numeral flashlamp;
Fig. 3 is the electrical block diagram of preferred embodiment in the present invention's numeral flashlamp;
Fig. 4 is the control flow chart of microprocessor in the present invention's numeral flashlamp.
Reference numeral
Xenon flash tube 13
Voltage doubling rectifing circuit 111
Electric capacity holding circuit 113
Trigger electric capacity 121
Independent capacitance C3, C4, C5, C6
High-power resistance R1
The first igbt Q1
Voltage acquisition feedback circuit Q3
The first optocoupler U2
The first resistance R 9
The second resistance R 8
The 3rd resistance R 7
The first igbt drives chip U5
Trigger winding T1
The second optocoupler U3
The second igbt Q2
The second igbt drives chip U6
The 4th resistance R 11
The 5th resistance R 12
Commutation diode D1, D2
Electrochemical capacitor C1, C2
Decline resistance R 5
The first pull-up resistor R4
The second pull-up resistor R3
The 3rd pull-up resistor R10
Protective resistance R2
First triggers resistance R 6
Second triggers resistance R 13
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.Owing to the invention discloses a kind of digital flashlamp and charging device, the relative theory of the electric component that wherein used can understand for those of ordinary skills, therefore with explanation hereinafter, no longer do complete description.Meanwhile, with the accompanying drawing hereinafter being contrasted, be intended to express the implication of the structure relevant with feature of the present invention, also do not need according to the complete drafting of physical size, formerly statement.
the first embodiment: digital flashlamp
First the present invention proposes the first embodiment, for the digital flashlamp of one, please refer to Fig. 1.Numeral flashlamp comprises: charging device 11, flip flop equipment 12, inside are equipped with xenon flash tube 13 and the microprocessor 14 of xenon, wherein, described microprocessor 14 is controlled described charging device 11 and is charged and control described flip flop equipment 12 described xenon flash tube is triggered; Described charging device 11 connects described flip flop equipment 12 it is charged to reach predetermined voltage.
Charging device 11 comprises voltage doubling rectifing circuit 111, main capacitance assembly 112 and electric capacity holding circuit 113.Flip flop equipment 12 comprises triggering electric capacity 121.Voltage doubling rectifing circuit 111 is converted to alternating voltage to be greater than this alternating voltage and the first voltage for direct current; electric capacity holding circuit 113 accepts after the first voltage main capacitance assembly 112 to charge, and guarantees that the main capacitance assembly 112 saturated voltage that charges is that second voltage and the voltage that triggers electric capacity 121 two ends are tertiary voltage.
In the present embodiment, utilize voltage doubling rectifing circuit 111 alternating voltage to be converted to DC voltage and to boost to the first voltage charges to main capacitance assembly 112 later again, because the first voltage is greater than main capacitance assembly 112 saturated the had second voltage that charges, the charge efficiency that therefore can improve greatly main capacitance assembly 112, reaches rapid charge effect.And control structure is simple, hardware controls reliability is high, without AD conversion, reaction velocity is fast, charging rate is fast, cost.
In the present embodiment, alternating voltage is common 220 volts, and the first voltage is between 550 volts to 650 volts, and second voltage is between 385 volts to 485 volts, and tertiary voltage is between 210 volts to 310 volts.Wherein, the first voltage is preferably 600 volts, and second voltage is preferably 435 volts, triggers the tertiary voltage obtaining after electric capacity 121 chargings and is preferably 260 volts.In case step below, also can make more detailed explanation.
Please refer to Fig. 3, in one embodiment, main capacitance assembly 112 is formed in parallel by multiple independent capacitance C3, C4, C5, C6.Owing to adopting independent capacitance parallel connection, can increase overall capacitance, and reduce overall electric capacity internal resistance, further speed charging rate.
Further, microprocessor 14 is connected with flip flop equipment 12 with charging device 11 respectively.Microprocessor 14, for export corresponding negative pulse in the triggered time, discharges to puncture the xenon in xenon flash tube 13 to control triggering electric capacity 121.Meanwhile, main capacitance assembly 112 discharges to xenon flash tube 13, forms flash of light; When negative pulse finishes, finish flash of light process.The present embodiment carries out control of discharge by microprocessor 14 is set, and makes flash time accurately adjustable, and flash of light energy is accurately adjustable.The form of microprocessor has a variety of, and such as single-chip microcomputer, the present invention does not limit at this.
Please refer to Fig. 3, electric capacity holding circuit 113 also comprises that performance number is greater than high-power resistance R1 and the first igbt Q1 of predetermined threshold.For the present invention, performance number is greater than 50W, can think high-power resistance, its objective is for protecting main capacitance assembly 112.The high-pressure side of the first voltage is connected to the source electrode of the first igbt Q1 by high-power resistance R1, the positive pole of main capacitance assembly 112 is connected with the positive pole of the first igbt Q1, and the negative pole of main capacitance assembly 112 is connected with the low pressure end of the first voltage., electric capacity holding circuit 113 is first just charged the first voltage by high-power resistance R1 protection later to main capacitance assembly 112.
Please refer to Fig. 3, in the present embodiment, electric capacity holding circuit 113 more comprises the first dividing potential drop branch road, voltage acquisition feedback circuit Q3 and the first optocoupler U2.The first dividing potential drop branch road is in parallel with main capacitance assembly 112, comprises the first resistance R 9, the second resistance R 8 and the 3rd resistance R 7 of series connection.Voltage acquisition feedback circuit Q3 comprises first input end, the first output terminal and the second output terminal.The high-pressure side of the dividing potential drop of the first resistance R 9 and the second resistance R 8 gained is as the input of the first input end of voltage acquisition feedback circuit Q3; The second output terminal of voltage acquisition feedback circuit Q3 is connected to the negative-phase input of the first optocoupler U2; The positive output end of the first optocoupler U2 is connected to the external interrupt input port of microprocessor 14.Whether the electric weight that the loop that the present embodiment consists of voltage acquisition feedback circuit Q3, the first optocoupler U2 and microprocessor 14 can respond main capacitance assembly 112 is fast and accurately full of, avoids overcharging, and has improved the security of main capacitance assembly 112.
Further, in the present embodiment, the first resistance R 9 is potentiometer, and its benefit is that the final charging voltage of main capacitance assembly 112 can change by the adjusting of potentiometer resistance.Voltage acquisition feedback circuit Q3 can be N-channel MOS pipe, and its first input end is that grid, the first output terminal are that source electrode, the second output terminal are drain electrode.Certainly,, except N-channel MOS pipe, voltage acquisition feedback circuit Q3 can also be the circuit of triode composition or the circuit of voltage comparator composition.
In conjunction with an example, the present invention is made to more detailed explanation below.
Please refer to Fig. 3, digital flashlamp consists predominantly of charging device 11, flip flop equipment 12, inside and is equipped with xenon flash tube 13 and the microprocessor 14 (the present embodiment employing single-chip microprocessor MCU) of xenon.
Charging device 11 comprises voltage doubling rectifing circuit 111, main capacitance assembly 112 and electric capacity holding circuit 113.Consist predominantly of
Electric capacity holding circuit 113 comprises high-power resistance R1, the first igbt Q1, the first igbt drives chip U5, the first dividing potential drop branch road (the first resistance R 9, the second resistance R 8 and the 3rd resistance R 7 are composed in series), voltage acquisition feedback circuit Q3 (the present embodiment is N-channel MOS pipe) and the first optocoupler U2.
The workflow of entirety:
220 volts of alternating voltages are transformed into through voltage doubling rectifing circuit 111 the first voltage that voltage is 600 volts of DC voltage, drive chip U5, voltage acquisition feedback circuit Q3 and the first optocoupler U2 and microprocessor 14 by high-power resistance R1, the first dividing potential drop branch road, the first igbt Q1, the first igbt, the voltage that guarantees main capacitance assembly 112 is the second voltage of 435 volts.
The 4th resistance R 11 and the 5th resistance R 12 by the second dividing potential drop branch road in flip flop equipment 12 guarantee that triggering electric capacity 121 is the tertiary voltage of 260 volts.When triggering, microprocessor 14 is exported corresponding negative pulse according to the triggered time of RS485 bus configuration, controlling the second igbt drives chip U6 to make the second igbt Q2 conducting, cause triggering electric capacity 121 to discharge, make trigger winding T1 form high pressure, xenon in high-voltage breakdown xenon flash tube 13, main capacitance assembly 112 discharges to xenon flash tube 13 by the second igbt Q2 of conducting simultaneously, form flash of light process, when the negative pulse of microprocessor 14 finishes, the second igbt Q2 disconnects main capacitance assembly 112 and xenon flash tube 13, finish flash of light process.
Specifically describe as follows:
(1) charging device 11
Charging device 11 comprises voltage doubling rectifing circuit 111, main capacitance assembly 112 and the electric capacity holding circuit 113 of electrical connection.
Voltage doubling rectifing circuit 111 includes commutation diode D1, D2 and electrochemical capacitor C1, C2, and 220 volts of alternating voltages are converted to 600 volts of DC voltage (the first voltage).
The high-pressure side of 600 volts of DC voltage is connected to the source electrode of the first igbt Q1 by high-power resistance R1, the low pressure end of 600 volts of DC voltage is connected to the negative pole of main capacitance assembly 112, and the drain electrode of the first igbt Q1 is connected to the positive pole of main capacitance assembly 112.Wherein, main capacitance assembly 112 is formed in parallel by multiple independent capacitance C3, C4, C5, C6.
Electric capacity holding circuit more comprises the first dividing potential drop branch road, voltage acquisition feedback circuit Q3 and the first optocoupler U2.The first resistance R 9 (potentiometer), the second resistance R 8 and the 3rd resistance R 7 are composed in series the first dividing potential drop branch road.The first dividing potential drop branch circuit parallel connection is at the two poles of the earth of main capacitance assembly 112, the high-pressure side of the dividing potential drop that the first resistance R 9 and the second resistance R 8 generate is as first input end (grid of the N-channel MOS pipe) input of voltage acquisition feedback circuit Q3, the first output terminal (source electrode of N-channel MOS pipe) of voltage acquisition feedback circuit Q3 is by decline resistance R 5 ground connection, the second output terminal (drain electrode of N-channel MOS pipe) of voltage acquisition feedback circuit Q3 is received the negative-phase input of the first optocoupler U2, the normal phase input end of the first optocoupler U2 connects 15 volts, the positive output end of the first optocoupler U2 is received 3.3 volts by the first pull-up resistor R4, and the external interrupt that accesses microprocessor 14 is inputted, the negative output head grounding of the first optocoupler U2.The I/O pin that microprocessor 14 is controlled charging is connected to the negative-phase input of the first igbt driving chip U5; the first igbt drives the normal phase input end of chip U5 by moving 3.3 volts on the second pull-up resistor R3, and the first igbt drives the output pin of chip U5 to connect the grid of the first igbt Q1 by protective resistance R2.
After numeral flashlamp powers on, 220 volts of alternating voltages form the high direct voltage of 600 volts through voltage doubling rectifing circuit 111 at the two ends of Chuan Lian two electrochemical capacitor C1, C2, charge to offer main capacitance assembly 112.When main capacitance assembly 112 voltages are during lower than 435 volts, the dividing potential drop that is connected in parallel on the second resistance R 8 in the first dividing potential drop branch road at main capacitance assembly 112 two ends and the 3rd resistance R 9 is less than 2.7 volts of the forward voltage of the first input end (grid of N-channel MOS pipe) of voltage acquisition feedback circuit Q3, the first output terminal of voltage acquisition feedback circuit Q3 and the second output terminal (source electrode of N-channel MOS pipe and drain electrode) disconnect, the input end of the first optocoupler U2 does not have voltage difference, and the output terminal of the first optocoupler U2 disconnects.The output signal that now microprocessor 14 detects the first optocoupler U2 is for high, and the control pin that drags down the first igbt driving chip U5 makes the first igbt drive chip U5 to be output as height, the first igbt drives chip U5 to drive the first igbt Q1 conducting, and 600 volts of DC voltage are charged to main capacitance assembly 112 by the first igbt Q1 of high-power resistance R1 and conducting.In the time that main capacitance assembly 112 reaches 435 volts, be connected in parallel on 2.7 volts of the forward voltage that the dividing potential drop of the second resistance R 8 and the 3rd resistance R 9 in the first dividing potential drop branch road at main capacitance assembly 112 two ends is greater than the first input end (grid of N-channel MOS pipe) of voltage acquisition feedback circuit Q3, so the first output terminal of voltage acquisition feedback circuit Q3 and the second output terminal (source electrode of N-channel MOS pipe and drain electrode) conducting, the input end of the first optocoupler U2 has voltage difference, the output terminal conducting of the first optocoupler U2.Now to detect the output signal of the first optocoupler U2 be low to microprocessor 14, and the control pin of drawing high the first igbt driving chip U5 makes the first igbt drive chip U5 to be output as low, the first igbt drives chip U5 to drive igbt to turn-off, and 600 volts of DC voltage stop charging to main capacitance assembly 112.So repeatedly.
Wherein, in the time regulating the resistance of the first resistance R 9, can change the dividing potential drop ratio of central the first resistance R 9 (potentiometer) of the first dividing potential drop branch road, the second resistance R 8 and the 3rd resistance R 7, therefore the voltage that main capacitance assembly 112 is finally assigned to also can change, and therefore the final charging voltage of main capacitance assembly 112 can change according to the adjusting of the first resistance R 9 resistances.The output terminal of the first optocoupler U2 is connected to the external interrupt input of microprocessor 14, can cause rapidly the interrupt response of microprocessor 14, thereby turn-offs the first igbt Q1 that charging is controlled, and protection main capacitance assembly 112 can not overcharge.
In the time of charging, 600 volts of DC voltage (the first voltage) higher than main capacitance assembly 112 final voltages (second voltage) are charged for main capacitance assembly 112, the capacitance that simultaneously the independent capacitance Parallel Design in main capacitance assembly 112 has increased main capacitance assembly 112 has reduced again the internal resistance of main capacitance assembly 112 by Capacitance parallel connection, greatly improve by this charging rate of main capacitance assembly 112, simultaneously by voltage acquisition feedback circuit Q3 and the first optocoupler U2, whether the loop that microprocessor 14 forms can respond fast and accurately main capacitance assembly 112 and be full of, avoid overcharging, also improved the security of main capacitance assembly 112.
The advantage of charging device 11 of the present invention is: control structure is simple, cost is low, and hardware controls reliability is high, without AD conversion, reaction velocity is fast, charging rate is fast.
(2) flip flop equipment 12
The second dividing potential drop branch circuit parallel connection of R11 and R12 composition, at the two ends of main capacitance assembly 112, is divided into 260 volts by 435 volts.The one end of triggering electric capacity 121 connects the high-pressure side of 260 volts, the other end connects the former limit of trigger winding T1, the other end on the former limit of trigger winding T1 and one end ground connection of secondary, the other end of trigger winding T1 secondary is connected to the trigger electrode of xenon flash tube 13, the positive pole of xenon flash tube 13 is connected to the negative pole of main capacitance assembly 112, the negative pole of xenon flash tube 13 connects the positive pole of commutation diode D3, the positive pole of the source electrode of the negative pole of commutation diode D3 and the second igbt Q2 and triggering electric capacity 121 links together, the grounded drain of the second igbt Q2.Outer triggering signal connects the input end of the second optocoupler U3, and the positive output end of the second optocoupler U3 is by moving 3.3 volts and be connected to the external interrupt input of microprocessor 14, the negative output head grounding of the second optocoupler U3 on the 3rd pull-up resistor R10.The triggering IO pin of microprocessor 14 is connected to the negative-phase input of the second igbt driving chip U6, and the second igbt drives the normal phase input end of chip U6 to be connected to 3.3 volts by the first triggering resistance R 6.The second igbt drives the output terminal of chip U6 to be connected to the grid of the second igbt Q2 by the second triggering resistance R 13.
The voltage rising edge of outside 5～12 volts is detected by microprocessor 14 through the second optocoupler U3, the triggering IO pin of microprocessor 14 is exported the low-voltage of certain pulsewidth, drives chip U6 to drive the second igbt Q2 conducting by the second igbt.Triggering electric capacity 121 discharges, and produce certain change in voltage on the former limit of trigger winding T1, therefore produce high pressure and ionize the xenon in xenon flash tube 13 in the secondary induction of trigger winding T1, main capacitance assembly 112 discharges to xenon flash tube 13 by the second igbt Q2 and the commutation diode D3 of conducting simultaneously, and xenon flash tube 13 is that luminous energy starts trigger flashing by electric energy conversion.In the time that the negative pulse of the triggering pin of microprocessor 14 finishes, the second igbt drives chip U6 to drive the second igbt Q2 to disconnect, and disconnects the electric discharge of main capacitance assembly 112 to xenon flash tube 13, stops trigger flashing.
Wherein flash time configures to microprocessor 14 by RS485 serial ports, and is kept in the EEPROM of microprocessor 14 inside.
The advantage of flip flop equipment of the present invention: due to simple in structure, integrated level is high, therefore has very strong antijamming capability, and owing to having adopted microprocessor 14 as trigger controller, therefore can accurately control flash time.
The control principle of above-mentioned charging device 11 and flip flop equipment 12, with reference to shown in Fig. 4, comprises the steps:
Receiving step S51, microprocessor 14 receives outer triggering signal;
Calculation procedure S52, receives after outside trigger pip at microprocessor, calculates xenon flash tube 13 flash of light energy per second according to flash time;
Determining step S53, judges whether above-mentioned amount of flash per second exceedes the given maximum flash of light energy of xenon flash tube 13;
Protection step S54, if described second amount of flash exceedes the given maximum flash of light energy of xenon flash tube 13, microprocessor 14 is respective external trigger pip no longer, makes xenon flash tube 13 enter guard mode, to prevent that xenon flash tube 13 from burning;
Flash step S55, if described second amount of flash do not exceed the given maximum flash of light energy of xenon flash tube 13, microprocessor 14 respective external trigger pips, glisten the xenon ionization in xenon flash tube 13.
In addition, in the time having continuous high frequency undesired signal, digital flashlamp of the present invention sends order by serial ports and informs and control the main frame of flashlamp, has the intelligence function that reports an error.
The maximum flash of light energy of xenon flash tube 13 is 100Ws, when reality flash of light energy exceedes maximum flash of light energy that xenon flash tube 13 allows a lot of time, the serviceable life that can reduce xenon flash tube 14.The present invention is owing to adopting the microprocessor of single-chip microcomputer type as the controller of triggering part, therefore the flash of light energy that can control flexibly by the program of microprocessor xenon flash tube 14 reality, prevents that too high triggering input or external disturbance from affecting the serviceable life of xenon flash tube 14.
Below, according to the difference of flash time, above-mentioned control principle is described further.
In the time that flash time is greater than 1000 milliseconds, first after flash of light, timer 0 starts timing, and counting variable (Flash_Counter) is set is 0, flash of light interval (flash of light and the mistiming of last time glistening again) is if be less than 300 microseconds, counting variable adds 1, otherwise counting variable makes zero, counting successively, in the time that counting variable is 2, think that flash of light energy is excessive, microprocessor 14 response external trigger pip no longer within 5 seconds, but can continue to count outer triggering signal, if continuous 6 trigger intervals of outer triggering signal are all in 300 microseconds, microprocessor 14 assert that there is high-frequency interferencing signal outside, make microprocessor 14 enter guard mode, report to the police to main frame by serial ports, and stop response external trigger pip 30 minutes.
In like manner; when flash time is during at 700 milliseconds～999 milliseconds; flash of light interval is in 250 microseconds; after group flashing light 4 times microprocessor 14 no longer response external trigger; if continuous 8 flash of light intervals are all in 250 microseconds; microprocessor 14 enters guard mode, reports to the police, and stop response external trigger pip 30 minutes by serial ports to main frame.
When flash time is during at 500 milliseconds～699 milliseconds; flash of light interval is in 200 microseconds; after group flashing light 5 times microprocessor 14 no longer response external trigger; if continuous 10 flash of light intervals are all in 200 microseconds; microprocessor 14 enters guard mode; report to the police to main frame by serial ports, and stop response external trigger pip 30 minutes.
When flash time is during at 300 milliseconds～499 milliseconds; flash of light interval is in 160 microseconds; after group flashing light 6 times microprocessor 14 no longer response external trigger; if continuous 12 flash of light intervals are all in 160 microseconds; microprocessor 14 enters guard mode; report to the police to main frame by serial ports, and stop response external trigger pip 30 minutes.
When flash time is during at 100 milliseconds～299 milliseconds; flash of light interval is in 140 microseconds; after group flashing light 7 times microprocessor 14 no longer response external trigger; if continuous 14 flash of light intervals are all in 140 microseconds; microprocessor 14 enters guard mode; report to the police to main frame by serial ports, and stop response external trigger pip 30 minutes.
When flash time is in the time being less than 100 milliseconds; flash of light interval is in 120 microseconds; after group flashing light 8 times microprocessor 14 no longer response external trigger; if continuous 16 flash of light intervals are all in 120 microseconds; microprocessor 14 enters guard mode; report to the police to main frame by serial ports, and stop response external trigger pip 30 minutes.
The technical parameter of digital flashlamp proposed by the invention: flash time is adjustable (20～1260 milliseconds) accurately, accurately adjustable (0～120Ws) of flash of light energy, maximum flashing rate 100Hz, moment telegram in reply (1 microsecond～100 microsecond), by 485 bus configuration flash times and flash of light energy power down preservation, 5～12 volts of rising edges trigger, working temperature-40～70 ℃, serviceable life 1,000 ten thousand times, classification of waterproof IP65.
To sum up, in the present invention:
The first, owing to having improved charging voltage, reduced the internal resistance of main capacitance assembly 121, voltage acquisition feedback circuit adopts the hardware circuit of N-channel MOS pipe composition, and detection speed is fast, and stability is high, therefore the telegram in reply speed of digital flashlamp of the present invention is fast, can reach 1 microsecond～100 microsecond.
The second, owing to having adopted microprocessor 14 to control flash of light process, digital flashlamp of the present invention have advantages of flash time and flash of light energy accurately controlled, antijamming capability is strong and unfailing performance is high.
Three,, owing to calculating the energy of p.s. in the software program of microprocessor 14, therefore this flash of light has advantages of overexposure protection, long service life; And, can also detect undesired signal, disturb if run into frequently, can self-protection.
Above digital flashlamp provided by the present invention is described in detail, applied specific embodiment herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all may have in specific embodiments and applications the change part being equal to.In sum, this description should not be construed as the restriction to interest field of the present invention.
Claims (9)
1. a digital flashlamp, comprise charging device, flip flop equipment, xenon flash tube and microprocessor, it is characterized in that, charging device charges to described xenon flash tube described in described microprocessor control, controls described flip flop equipment described xenon flash tube is triggered; Described charging device connects described flip flop equipment it is charged to reach predetermined voltage;
Described charging device comprises voltage doubling rectifing circuit, main capacitance assembly and electric capacity holding circuit, described voltage doubling rectifing circuit is converted to alternating voltage the first voltage of direct current, by described electric capacity holding circuit, described main capacitance assembly is charged, making described main capacitance component voltage is second voltage; Described flip flop equipment comprises triggering electric capacity, and the voltage that triggers electric capacity two ends is tertiary voltage; Described the first voltage is greater than second voltage, second voltage is greater than tertiary voltage;
Wherein, described electric capacity holding circuit also comprises that performance number is greater than high-power resistance and first insulated gate bipolar transistor of predetermined threshold; The power supply high-pressure side that forms described the first voltage is connected to the source electrode of described the first insulated gate bipolar transistor by described high-power resistance, the positive pole of described main capacitance assembly is connected to the positive pole of described the first insulated gate bipolar transistor, and the negative pole of described main capacitance assembly is connected to the power supply low pressure end that forms described the first voltage.
2. digital flashlamp according to claim 1, is characterized in that, described main capacitance assembly is formed in parallel by multiple independent capacitances.
3. digital flashlamp according to claim 1; it is characterized in that; described microprocessor is exported corresponding negative pulse in the triggered time; control described triggering capacitor discharge to puncture the xenon in described xenon flash tube; simultaneously; described main capacitance assembly makes described xenon flash tube electric discharge by described electric capacity holding circuit, forms flash of light.
4. digital flashlamp according to claim 1, is characterized in that,
Described electric capacity holding circuit also comprises the first dividing potential drop branch road, voltage acquisition feedback circuit and the first optocoupler;
Described voltage acquisition feedback circuit comprises first input end, the first output terminal and the second output terminal;
Described the first dividing potential drop branch circuit parallel connection, to described main capacitance assembly, comprises the first resistance, the second resistance and the 3rd resistance of series connection, and the high-pressure side of the dividing potential drop of described the first resistance and the second resistance gained is connected to the first input end of described voltage acquisition feedback circuit;
The second output terminal of described voltage acquisition feedback circuit is connected to the negative-phase input of described the first optocoupler;
Described microprocessor comprises external interrupt input port, is connected to the positive output end of described the first optocoupler.
5. digital flashlamp according to claim 4, is characterized in that, described the first resistance is potentiometer.
6. digital flashlamp according to claim 4, is characterized in that, described voltage acquisition feedback circuit is N-channel MOS pipe, and described first input end is grid, and described the first output terminal is source electrode, and described the second output terminal is drain electrode.
7. digital flashlamp according to claim 6, is characterized in that, described voltage acquisition feedback circuit is transistor circuit or voltage comparator circuit.
8. digital flashlamp according to claim 1, is characterized in that, the two ends of described main capacitance assembly are also parallel with the second dividing potential drop branch road, and described the second dividing potential drop branch road is got tertiary voltage, as the voltage after described triggering capacitor charging.
9. digital flashlamp according to claim 1, is characterized in that,
Described the first voltage is between 550 volts to 650 volts, and described second voltage is between 385 volts to 485 volts, and described tertiary voltage is between 210 volts to 310 volts; And
Described predetermined threshold is 50W.
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| CN201010581957.1A CN102540642B (en) | 2010-12-10 | 2010-12-10 | Digital flash lamp and method for controlling flashing of digital flash lamp |
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| CN201010581957.1A CN102540642B (en) | 2010-12-10 | 2010-12-10 | Digital flash lamp and method for controlling flashing of digital flash lamp |
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| DE102012219320A1 (en) * | 2012-10-23 | 2014-04-24 | Kuka Roboter Gmbh | Power electronic circuit, electric machine and method for checking the functionality of a power electronic circuit |
| CN102938966B (en) * | 2012-11-22 | 2014-10-08 | 江苏大为科技股份有限公司 | High-frequency and long-life intelligent xenon flash lamp controller |
| CN103024999B (en) * | 2012-11-27 | 2015-02-04 | 深圳市蓝盾科技有限公司 | LED (Light-Emitting Diode) stroboscopic light supplement lamp |
| CN103428971B (en) * | 2013-08-19 | 2015-06-17 | 四川圣寰科技有限公司 | Charging and discharging circuit of flashlight and implementation method thereof |
| CN104539014A (en) * | 2014-12-29 | 2015-04-22 | 深圳市航盛电子股份有限公司 | Novel wireless charger and method for lowering wireless charging stand-by power consumption of novel wireless charger |
| US10085092B2 (en) * | 2015-03-02 | 2018-09-25 | Profoto Ab | Flash head and extension cable with identification electronics and a flash generator |
| CN106292130B (en) * | 2016-08-19 | 2019-06-11 | 邱晓建 | A kind of device and method using the triggering photo timing of camera flash-light pulse signal |
| CN106353953B (en) * | 2016-09-28 | 2019-08-16 | 深圳市品色科技有限公司 | Flash lamp module and flash generator mould group |
| CN110266094A (en) * | 2019-07-04 | 2019-09-20 | 深圳市吉瑞德隆电子科技有限公司 | A kind of depilatory apparatus and its operating voltage of the light source control method |
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