CN101145061A - Density disc drive device of automatic light modulation system - Google Patents
Density disc drive device of automatic light modulation system Download PDFInfo
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- CN101145061A CN101145061A CNA2007100561580A CN200710056158A CN101145061A CN 101145061 A CN101145061 A CN 101145061A CN A2007100561580 A CNA2007100561580 A CN A2007100561580A CN 200710056158 A CN200710056158 A CN 200710056158A CN 101145061 A CN101145061 A CN 101145061A
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Abstract
The present invention relates to a density-disk driving device used in a double-loop-controlled automatic lighting system, the device takes a encoder and a counter as speed feedback elements, takes a photosensitive resistor as a position feedback element, and forms a speed-position double-loop system; when the illumination value received by the photosensitive resistor is quite different from the standard value, the dutyfactor of the width wave output by a controller is bigger, the rotating speed of a motor is increased, which rotates the density disk fast; while the illumination value received by the photosensitive resistor is mostly equal to the standard value, the dutyfactor of the width wave output by the controller is smaller, the rotating speed of the motor is reduced, which reduces the speed of the density disk; in this way, on one hand, the illumination flux can reach the standard value in short time; on the other hand, the density disk can be stopped at the correct position to gain the required standard illumination flux, so that the film can get the best contrast. The present invention has fast response and high precision of adjustment.
Description
Technical field
The present invention relates to a kind of automatic light control system, particularly a kind ofly drive the device that density dish in the automatic light control system is adjusted luminous flux in the light path fast, constantly.
Background technology
Video camera is when taking the sky airbound target, because the variation of sky background brightness causes that film picture background illuminance also changes.Purpose with an automatic light meter is exactly automatically to regulate luminous flux, with the influence that guarantees that the illuminance value that receives on the film is not changed by extraneous light, thereby makes film obtain optimum contrast.At present, in automatic light control system, generally all adopt motor 4 as driving element, photoresistance 2 is as position feedback element (as shown in Figure 1), receive the feedback signal of photoresistance 2 when controller 1 after, transfer wide ripple and other control signals with drive motor 4 runnings according to the illumination difference to power drive unit 3 outputs, adjust the brightness value of practising physiognomy thereby drive density dish 5 rotates.But this density disk drive device can not be controlled motor speed according to the illumination difference, thereby response speed is slow, the adjustment precision is low; The poor reliability of system under the condition of environmental change externally, the disturbance rejection ability.
Summary of the invention
The technical problem to be solved in the present invention provides density disk drive device in a kind of automatic light control system that adopts two closed-loop controls, this installs with the scrambler sum counter as the velocity feedback element, photoresistance is as the position feedback element, constitute the velocity location double loop system, realize servocontrol, response speed is fast, adjustment precision height.
The present invention includes controller, photoresistance, power drive unit, motor, scrambler, programmable logic device (PLD); Photoresistance places a side of density dish, one termination bleeder circuit, and the other end is connected with the controller input, and controller output is connected with the power drive unit input, and power drive unit output is connected with motor; Controller reads the component voltage value in the photoresistance, compare with standard value, wide conformance control signal is transferred in controller output when deviation occurring, turn round by the power drive unit drive motor, drive the density dish and rotate the adjustment luminous flux, thereby changing the brightness value that photoresistance received, reduce the deviation between photoresistance partial pressure value and standard value, is 0 until deviation; Scrambler connects with motor coaxle, the output of scrambler is connected with programmable logic device (PLD), scrambler is converted to digital data transmission with the motor velocity signal of gathering and gives programmable logic device (PLD), by programmable logic device (PLD) the digital signal of scrambler output is counted; Programmable logic device (PLD) is connected with controller, and controller reads the programmable logic device (PLD) count value, and changes the dutycycle that wide ripple is transferred in output according to count value, to change rotating speed of motor.When brightness value that photoresistance received and standard value differed big, the dutycycle of the wide ripple of accent of controller output was bigger, and motor speed is fast, makes density dish quick rotation; When brightness value that photoresistance received and standard value differ hour, the dutycycle of the wide ripple of accent of controller output is little, motor speed slows down, the density dish is slowed down gradually, can make luminous flux reach standard value at short notice like this, can make the density dish be parked in position accurately again, obtain the luminous flux of required standard, thereby make film obtain optimum contrast.The present invention is because increase scrambler and programmable logic device (PLD) as the velocity feedback element, make motor change rotating speed according to brightness value and the difference between the standard value that photoresistance received, thereby response speed is fast, adjustment precision height.
As an improvement of the present invention is that the present invention also comprises reducer casing, holding circuit; Connect reducer casing between density dish and the motor, motor slows down, improves limit signal a little less than moment and output intensity, the light by reducer casing; The light intensity of reducer casing, the weak limit signal output of light connect holding circuit; Wide ripple output of the accent of controller and control signal output connect the power drive unit input end by holding circuit; Limit signal (output high level) a little less than reducer casing output intensity, light behind the spacing position a little less than density dish arrival light intensity, the light; make the wide ripple output of accent and the control signal output of controller change 0 into through holding circuit; power drive unit stops to send the wide ripple of accent that motor is rotated to spacing direction; avoiding damaging light adjusting system physical construction, thereby the reliability height.
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Description of drawings
Fig. 1 is a density disk drive device structured flowchart in the prior art automatic light control system.Among the figure 1, controller, 2, photoresistance, 3, power drive unit, 4, motor, 5, the density dish.
Fig. 2 also is a Figure of abstract for density disk drive device structured flowchart in the automatic light control system of the present invention.Among the figure 6, controller, 7, photoresistance, 8, power drive unit, 9, motor, 10, the density dish, 11, scrambler, 12, programmable logic device (PLD).
Fig. 3 is the further improved structured flowchart of density disk drive device in the automatic light control system of the present invention.Among the figure 6, controller, 7, photoresistance, 8, power drive unit, 9, motor, 19, reducer casing, 11, scrambler, 12, programmable logic device (PLD), 20, holding circuit, 10, the density dish.
Fig. 4 is a programmable logic device (PLD) internal logic structure block diagram of the present invention.Among the figure 13, d type flip flop, 14,16 digit counters, 15, first latch, 16, second latch, 17, code translator.
Fig. 5 is the embodiment of the invention 1 structured flowchart.Among the figure 18, single-chip microcomputer, 7, photoresistance, 8, power drive unit, 9, motor, 11, scrambler, 12, programmable logic device (PLD), 10, the density dish.
Fig. 6 is the embodiment of the invention 2 structured flowcharts.Among the figure 26, digital signal processor, 7, photoresistance, 8, power drive unit, 9, motor, 11, scrambler, 12, programmable logic device (PLD), 10, the density dish.
Fig. 7 is the embodiment of the invention 3 structured flowcharts.Among the figure 18, single-chip microcomputer, 7, photoresistance, 8, power drive unit; 9, motor, 11, scrambler, 12, programmable logic device (PLD); 10, density dish, 19, reducer casing, 20, holding circuit; 21, first not gate; 22, second not gate, the 23, the 3rd not gate, 24, the one or three end input and door; 25, the two or three end input and door, 27, optocoupler.
Fig. 8 is the embodiment of the invention 4 structured flowcharts.Among the figure 26, digital signal processor, 7, photoresistance, 8, power drive unit; 9, motor, 11, scrambler, 12, programmable logic device (PLD); 10, density dish, 19, reducer casing, 20, holding circuit; 21, first not gate; 22, second not gate, the 23, the 3rd not gate, 24, the one or three end input and door; 25, the two or three end input and door, 27, optocoupler.
Fig. 9 is the program flow diagram of controller of the present invention.
Embodiment
Embodiment 1 (as shown in Figure 5)
The present invention includes controller 6, photoresistance 7, power drive unit 8, motor 9, scrambler 11, programmable logic device (PLD) 12; Controller 6 adopts single-chip microcomputer 18, and photoresistance 7 places a side of density dish 10, and one termination bleeder circuit, the other end connect the A/D input of single-chip microcomputer 18; The I/O mouth that enables EN, transfers wide ripple to export HSO.0 and outbound course signal of single-chip microcomputer 18 connects the Enable Pin and the input end of power drive unit 8 respectively; 8 two output terminals of power drive unit are connected with the positive and negative end of motor 9 power supplys respectively; Single-chip microcomputer 18 reads the component voltage value in the photoresistance 7, compares with standard value, and when the component voltage value in the photoresistance 7 equated with standard value, single-chip microcomputer 18 enabled to be output as 0, power drive unit 8 no drive signal outputs; When the component voltage value in the photoresistance 7 is compared with standard value when deviation occurring, single-chip microcomputer 18 enables to be output as 1, power drive unit 8 is according to the wide direction signal output drive signal that involves of accent of single-chip microcomputer 18 outputs, motor 9 is just being changeed or reverse, drive density dish 10 and rotate the adjustment luminous flux, changing the brightness value that photoresistance 7 is received, thereby reduce the deviation between photoresistance 7 partial pressure value and standard value, is 0 until deviation.
Programmable logic device (PLD) 12 internal circuits comprise d type flip flop 13,16 digit counter 14, the first latchs, 15, the second latchs 16 and code translators 17; Scrambler 11 and 9 coaxial connections of motor, an output of scrambler 11 connects the input end of d type flip flop 13, and another output is connected with the input end of clock of d type flip flop 13 and the counting end of 16 digit counters 14 simultaneously; The plus-minus sign input end of the output termination counter 14 of d type flip flop 13, when motor 9 turns clockwise, the output terminal of d type flip flop 13 is 1, counter 14 adds 1; When motor 9 is rotated counterclockwise, the output terminal of d type flip flop 13 is 0, and counter 14 subtracts 1; 16 outputs of counter 14 connect 8 first latch 15 and the input of second latch 16, and 16 count value most-significant bytes of counter 14 are stored in first latch 15, and least-significant byte is stored in second latch 16; 8 outputs of first latch 15 and second latch 16 connect the 8 bit data input of single-chip microcomputer 18; The reading and writing of code translator 17, sheet choosing connect reading and writing, the sheet choosing of single-chip microcomputer 18, and two of code translator 17 enable to connect respectively enabling of first latch 15 and second latch 16; When single-chip microcomputer 18 is wanted reading of data, by code translator 17 output enable signals, read 8 bit data of first latch 15 earlier, and 8 bit data of two latchs 16 are latched, read 8 bit data of second latch 16 constantly at next.Single-chip microcomputer 18 changes the dutycycle that wide ripple is transferred in output according to first latch 15 that reads, the count value of second latch, 16 outputs, changes the rotating speed of motor 9 by power drive unit 8.When brightness value that is received when photoresistance 7 and standard value differed big, the dutycycle of the wide ripple of accent of single-chip microcomputer 18 outputs was bigger, and motor 9 rotating speeds are fast, make density dish 10 quick rotation; Brightness value that is received when photoresistance 7 and standard value differ hour, the dutycycle of the wide ripple of accent of single-chip microcomputer 18 outputs is little, motor 9 rotating speeds slow down, density dish 10 is slowed down gradually, can make luminous flux reach standard value at short notice like this, can make density dish 10 be parked in position accurately again, obtain the luminous flux of required standard, thereby make film obtain optimum contrast.
Embodiment 2 (as shown in Figure 5)
The present invention includes controller 6, photoresistance 7, power drive unit 8, motor 9, scrambler 11, programmable logic device (PLD) 12; Controller 6 adopts digital signal processor 26, and photoresistance 7 places a side of density dish 10, one termination bleeder circuit, the A/D input of another termination digital signal processor 26; The I/O mouth that enables, transfers wide ripple output PWM and outbound course signal of digital signal processor 26 connects enabling of power drive unit 8 and input end; 8 two output terminals of power drive unit are connected with the positive and negative end of motor 9 power supplys respectively; Digital signal processor 26 reads the component voltage value in the photoresistance 7, compares with standard value, and when the component voltage value in the photoresistance 7 equated with standard value, digital signal processor 26 enabled to be output as 0, power drive unit 8 no drive signal outputs; When the component voltage value in the photoresistance 7 is compared with standard value when deviation occurring, digital signal processor 26 enables to be output as 1, power drive unit 8 is according to the wide direction signal output drive signal that involves of accent of digital signal processor 26 outputs, motor 9 is just being changeed or reverse, drive density dish 10 and rotate the adjustment luminous flux, changing the brightness value that photoresistance 7 is received, thereby reduce the deviation between photoresistance 7 partial pressure value and standard value, is 0 until deviation.
Programmable logic device (PLD) 12 internal circuits comprise d type flip flop 13,16 digit counter 14, the first latchs, 15, the second latchs 16 and code translators 17; Scrambler 11 and 9 coaxial connections of motor, an output of scrambler 11 connects the input end of d type flip flop 13, and another output is connected with the input end of clock of d type flip flop 13 and the counting end of 16 digit counters 14 simultaneously; The plus-minus sign input end of the output termination counter 14 of d type flip flop 13, when motor 9 turns clockwise, the output terminal of d type flip flop 13 is 1, counter 14 adds 1; When motor 9 is rotated counterclockwise, the output terminal of d type flip flop 13 is 0, and counter 14 subtracts 1; 16 outputs of counter 14 connect 8 first latch 15 and the input of second latch 16, and 16 count value most-significant bytes of counter 14 are stored in first latch 15, and least-significant byte is stored in second latch 16; 8 outputs of first latch 15 and second latch 16 connect the 8 bit data input of digital signal processor 26; The reading and writing of code translator 17, sheet choosing connect reading and writing, the sheet choosing of digital signal processor 26, and two of code translator 17 enable to connect respectively enabling of first latch 15 second latchs 16; When digital signal processor 26 is wanted reading of data, by code translator 17 output enable signals, read 8 bit data of first latch 15 earlier, and 8 bit data of second latch 16 are latched, read 8 bit data of second latch 16 constantly at next.Digital signal processor 26 changes the dutycycle of the wide ripple of accent of output according to first latch 15 that reads, the count value of second latch, 16 outputs, changes the rotating speed of motor 9 by power drive unit 8.When brightness value that is received when photoresistance 7 and standard value differed big, the dutycycle of the wide ripple of accent of digital signal processor 26 outputs was bigger, and motor 9 rotating speeds are fast, make density dish 10 quick rotation; Brightness value that is received when photoresistance 7 and standard value differ hour, the dutycycle of the wide ripple of accent of digital signal processor 26 outputs is little, motor 9 rotating speeds slow down, density dish 10 is slowed down gradually, can make luminous flux reach standard value at short notice like this, can make density dish 10 be parked in position accurately again, obtain the luminous flux of required standard, thereby make film obtain optimum contrast.
Embodiment 3 (as shown in Figure 6)
The present invention includes controller 6, photoresistance 7, power drive unit 8, motor 9, reducer casing 19, scrambler 11, programmable logic device (PLD) 12, holding circuit 20.
An improvement as present embodiment holding circuit 20 is that holding circuit 20 also comprises an optocoupler 27; single-chip microcomputer 18 enable the input of EN, the one or three end and door 24 and the input of the two or three end and 25 output terminal by optocoupler 27 and power drive unit 8 enable be connected with input end, optocoupler 27 plays the effect of insulation blocking.
Programmable logic device (PLD) 12 internal circuits comprise d type flip flop 13,16 digit counter 14, the first latchs, 15, the second latchs 16 and code translators 17; Scrambler 11 and 9 coaxial connections of motor, an output of scrambler 11 connects the input end of d type flip flop 13, and another output is connected with the input end of clock of d type flip flop 13 and the counting end of 16 digit counters 14 simultaneously; The plus-minus sign input end of the output termination counter 14 of d type flip flop 13, when motor 9 turns clockwise, the output terminal of d type flip flop 13 is 1, counter 14 adds 1; When motor 9 is rotated counterclockwise, the output terminal of d type flip flop 13 is 0, and counter 14 subtracts 1; 16 outputs of counter 14 connect 8 first latch 15 and the input of second latch 16, and 16 count value most-significant bytes of counter 14 are stored in first latch 15, and least-significant byte is stored in second latch 16; 8 outputs of first latch 15 and second latch 16 connect the 8 bit data input of single-chip microcomputer 18; The reading and writing of code translator 17, sheet choosing connect reading and writing, the sheet choosing of single-chip microcomputer 18, and two of code translator 17 enable to connect respectively enabling of first latch 15 second latchs 16; When single-chip microcomputer 18 is wanted reading of data, by code translator 17 output enable signals, read 8 bit data of first latch 15 earlier, and 8 bit data of second latch 16 are latched, read 8 bit data of second latch 16 constantly at next.Single-chip microcomputer 18 changes the dutycycle that wide ripple is transferred in output according to first latch 15 that reads, the count value of second latch, 16 outputs, changes the rotating speed of motor 9 by power drive unit 8.When brightness value that is received when photoresistance 7 and standard value differed big, the dutycycle of the wide ripple of accent of single-chip microcomputer 18 outputs was bigger, and motor 9 rotating speeds are fast, make density dish 10 quick rotation; Brightness value that is received when photoresistance 7 and standard value differ hour, the dutycycle of the wide ripple of accent of single-chip microcomputer 18 outputs is little, motor 9 rotating speeds slow down, density dish 10 is slowed down gradually, can make luminous flux reach standard value at short notice like this, can make density dish 10 be parked in position accurately again, obtain the luminous flux of required standard, thereby make film obtain optimum contrast.
Embodiment 4 (as shown in Figure 7)
The present invention includes controller 6, photoresistance 7, power drive unit 8, motor 9, reducer casing 19, scrambler 11, programmable logic device (PLD) 12, holding circuit 20.
An improvement as present embodiment holding circuit 20 is that holding circuit 20 also comprises an optocoupler 27, the enabling of digital signal processor 26, the input of the one or three end and door 24 and the input of the two or three end and 25 output terminal by optocoupler 27 and power drive unit 8 enable be connected with input end; Optocoupler 27 plays the effect of insulation blocking.
Programmable logic device (PLD) 12 internal circuits comprise d type flip flop 13,16 digit counter 14, the first latchs, 15, the second latchs 16 and code translators 17; Scrambler 11 and 9 coaxial connections of motor, an output of scrambler 11 connects the input end of d type flip flop 13, and another output is connected with the input end of clock of d type flip flop 13 and the counting end of 16 digit counters 14 simultaneously; The plus-minus sign input end of the output termination counter 14 of d type flip flop 13, when motor 9 turns clockwise, the output terminal of d type flip flop 13 is 1, counter 14 adds 1; When motor 9 is rotated counterclockwise, the output terminal of d type flip flop 13 is 0, and counter 14 subtracts 1; 16 outputs of counter 14 connect 8 first latch 15 and the input of second latch 16, and 16 count value most-significant bytes of counter 14 are stored in first latch 15, and least-significant byte is stored in second latch 16; 8 outputs of first latch 15 and second latch 16 connect the 8 bit data input of digital signal processor 26; The reading and writing of code translator 17, sheet choosing connect reading and writing, the sheet choosing of digital signal processor 26, and two of code translator 17 enable to connect respectively enabling of first latch 15 second latchs 16; When digital signal processor 26 is wanted reading of data, by code translator 17 output enable signals, read 8 bit data of first latch 15 earlier, and other 8 bit data of second latch 16 are latched, read 8 bit data of second latch 16 constantly at next.Digital signal processor 26 changes the dutycycle of the wide ripple of accent of output according to first latch 15 that reads, the count value of second latch, 16 outputs, changes the rotating speed of motor 9 by power drive unit 8.When brightness value that is received when photoresistance 7 and standard value differed big, the dutycycle of the wide ripple of accent of digital signal processor 26 outputs was bigger, and motor 9 rotating speeds are fast, make density dish 10 quick rotation; Brightness value that is received when photoresistance 7 and standard value differ hour, the dutycycle of the wide ripple of accent of digital signal processor 26 outputs is little, motor 9 rotating speeds slow down, density dish 10 is slowed down gradually, can make luminous flux reach standard value at short notice like this, can make density dish 10 be parked in position accurately again, obtain the luminous flux of required standard, thereby make film obtain optimum contrast.
Claims (9)
1. density disk drive device in the automatic light control system comprises controller, photoresistance, and power drive unit, motor is characterized in that also comprising scrambler (11), programmable logic device (PLD) (12); Scrambler (11) and coaxial connection of motor (9), the output of scrambler (11) is connected with programmable logic device (PLD) (12), scrambler (11) is converted to digital data transmission with motor (9) rate signal of gathering and gives programmable logic device (PLD) (12), by programmable logic device (PLD) (12) digital signal of scrambler (11) output is counted; Programmable logic device (PLD) (12) is connected with controller (6), and controller (6) reads programmable logic device (PLD) (12) count value, and changes the dutycycle that wide ripple is transferred in output according to count value.
2. density disk drive device in the automatic light control system according to claim 1 is characterized in that also comprising reducer casing (19), holding circuit (20); Connect reducer casing (19) between density dish (10) and the motor (9); The light intensity of reducer casing (19), the weak limit signal output of light connect holding circuit (20); Wide ripple output of the accent of controller (6) and control signal output connect power drive unit (8) input end by holding circuit (20).
3. according to density disk drive device in claim 1 or the 2 any described automatic light control systems of claim, it is characterized in that controller (6) adopts single-chip microcomputer.
4. according to density disk drive device in claim 1 or the 2 any described automatic light control systems of claim, it is characterized in that controller (6) adopts digital signal processor (26).
5. density disk drive device in the automatic light control system according to claim 3, it is characterized in that programmable logic device (PLD) (12) internal circuit comprises d type flip flop (13), 16 digit counters (14), first latch (15), second latch (16) and code translator (17); An output of scrambler (11) connects the input end of d type flip flop (13), and another output is connected with the input end of clock of d type flip flop (13) and the counting end of 16 digit counters (14) simultaneously; The plus-minus sign input end of the output termination counter of d type flip flop (13); 16 outputs of counter (14) connect the input of 8 first latch (15) and second latch (16), and 16 count value most-significant bytes of counter (14) are stored in first latch (15), and least-significant byte is stored in second latch (16); 8 outputs of first latch (15) and second latch (16) connect the 8 bit data input of single-chip microcomputer (18); The reading and writing of code translator (17), sheet choosing connect reading and writing, the sheet choosing of single-chip microcomputer (18), and two of code translator (17) enable to connect respectively enabling of first latch (15) and second latch (16).
6. density disk drive device in the automatic light control system according to claim 4, it is characterized in that programmable logic device (PLD) (12) internal circuit comprises d type flip flop (13), 16 digit counters (14), first latch (15), second latch (16) and code translator (17); An output of scrambler (11) connects the input end of d type flip flop (13), and another output is connected with the input end of clock of d type flip flop (13) and the counting end of 16 digit counters (14) simultaneously; The plus-minus sign input end of the output termination counter of d type flip flop (13); 16 outputs of counter (14) connect the input of 8 first latch (15) and second latch (16), and 16 count value most-significant bytes of counter (14) are stored in first latch (15), and least-significant byte is stored in second latch (16); 8 outputs of first latch (15) and second latch (16) connect the 8 bit data input of digital signal processor (26); The reading and writing of code translator (17), sheet choosing connect reading and writing, the sheet choosing of digital signal processor (26), and two of code translator (17) enable to connect respectively enabling of first latch (15) and second latch (16).
7. density disk drive device in the automatic light control system according to claim 3, it is characterized in that holding circuit (20) comprises first not gate (21), second not gate (22), the 3rd not gate (23), input of the one or three end and door (24), input of the two or three end and door (25); The EN that enables of single-chip microcomputer (18) directly meets of power drive unit (8) and enables input; The wide ripple of the accent of single-chip microcomputer (18) is exported the input end that HSO.0 connects the input of the one or three end and door (24) and input of the two or three end and door (25) simultaneously; The direction signal branch that the I/O mouth of single-chip microcomputer (18) is exported is made two-way, and second not gate (22) of leading up to connects an input of input of the one or three end and door (24), and another road directly connects an input of input of the two or three end and door (25); The weak limit signal of the light of reducer casing (19) output connects an input of the input of the one or three end and door (24) by first not gate (21), and the light intensity limit signal connects an input of the input of the two or three end and (25) by the 3rd not gate (23); The input of the one or three end is received the input end of power drive unit (8) with door (24) and the input of the two or three end with the wide ripple of accent of door (25) output; The output of power drive unit (8) connects the positive and negative end of motor (9) power supply.
8. density disk drive device in the automatic light control system according to claim 3, it is characterized in that holding circuit (20) comprises first not gate (21), second not gate (22), the 3rd not gate (23), input of the one or three end and door (24), input of the two or three end and door (25); An input end that enables directly to connect power drive unit (8) of digital signal processor (26); The wide ripple of the accent of digital signal processor (26) is exported the input end that PWM connects the input of the one or three end and door (24) and input of the two or three end and door (25) simultaneously; The direction signal branch that the I/O mouth of digital signal processor (26) is exported is made two-way, and second not gate (22) of leading up to connects an input of input of the one or three end and door (24), and another road directly connects an input of input of the two or three end and door (25); The weak limit signal of the light of reducer casing (19) output connects an input of the input of the one or three end and door (24) by first not gate (21), and the light intensity limit signal connects an input of the input of the two or three end and (25) by the 3rd not gate (23); The input of the one or three end is received power drive unit (8) input end with door (24) and the input of the two or three end with the wide ripple of accent of door (25) output; The output of power drive unit (8) connects the positive and negative end of motor (9) power supply.
9. according to density disk drive device in claim 1 or the 2 any described automatic light control systems of claim, it is characterized in that motor (9) adopts direct current generator; Scrambler (11) adopts incremental encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100561580A CN100511073C (en) | 2007-10-11 | 2007-10-11 | Density disc drive device of automatic light modulation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100561580A CN100511073C (en) | 2007-10-11 | 2007-10-11 | Density disc drive device of automatic light modulation system |
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| CN101145061A true CN101145061A (en) | 2008-03-19 |
| CN100511073C CN100511073C (en) | 2009-07-08 |
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| CNB2007100561580A Expired - Fee Related CN100511073C (en) | 2007-10-11 | 2007-10-11 | Density disc drive device of automatic light modulation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079831A (en) * | 2014-06-30 | 2014-10-01 | 苏州吉视电子科技有限公司 | Camera with multiple paths of flash synchronizing signals |
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09115825A (en) * | 1995-10-19 | 1997-05-02 | Nikon Corp | Scanning type projection aligner |
| CN2397516Y (en) * | 1999-12-01 | 2000-09-20 | 中国科学院长春光学精密机械研究所 | Camera fully automatic light-adjusting and focusing system controlled by one-chip computer |
| IL136016A (en) * | 2000-05-08 | 2005-11-20 | Yaskawa Eshed Technology Ltd | High sensor resolution position sensor device and method |
| CN2506978Y (en) * | 2001-10-19 | 2002-08-21 | 中国科学院长春光学精密机械与物理研究所 | Balance type light regulation mechanism for camera of photoelectric theodolite |
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2007
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079831A (en) * | 2014-06-30 | 2014-10-01 | 苏州吉视电子科技有限公司 | Camera with multiple paths of flash synchronizing signals |
| CN104079831B (en) * | 2014-06-30 | 2017-09-12 | 苏州吉视电子科技有限公司 | A kind of camera with multichannel flash synchronization signal |
| CN106714391A (en) * | 2017-03-07 | 2017-05-24 | 苏州佳世达电通有限公司 | Dimming device and dimming method thereof |
| CN106714391B (en) * | 2017-03-07 | 2018-05-18 | 苏州佳世达电通有限公司 | Light modulating device and its light-dimming method |
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| CN100511073C (en) | 2009-07-08 |
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