CN110209006A - A kind of projection screen limit control and limit control method - Google Patents
A kind of projection screen limit control and limit control method Download PDFInfo
- Publication number
- CN110209006A CN110209006A CN201910567290.0A CN201910567290A CN110209006A CN 110209006 A CN110209006 A CN 110209006A CN 201910567290 A CN201910567290 A CN 201910567290A CN 110209006 A CN110209006 A CN 110209006A
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- China
- Prior art keywords
- controller
- line unit
- point
- control circuit
- projection screen
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Classifications
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/20—Arrangements for starting
- H02P6/22—Arrangements for starting in a selected direction of rotation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention discloses a kind of projection screen limit control and limit control methods, device includes power supply, controller, control circuit, the control circuit both ends are separately connected the power supply and driving motor, the control circuit includes sensor, single-chip microcontroller, relay and electric motor starting capacitor, sensor detects the turnning circle of the driving motor, the single-chip microcontroller stores coboundary point, lower boundary point, turnning circle, and send a signal to the relay, the relay controls the electric motor starting capacitor, and finally control the rotating forward of driving motor, overturning, stop, the controller controls the control circuit, the controller includes upper line unit and lower line unit, pressing line unit can wind, again by stopping；Pressing lower line unit can unreel, then by stopping；Line unit can record coboundary point, lower boundary point in long-pressing.For the present invention using mature electronic component, cost is lower, installs, debugs convenient, stable, long service life.
Description
Technical field
The invention belongs to projection screen apparatus fields, and in particular to a kind of projection screen limit control and limit controlling party
Method.
Background technique
Projection screen is used in conjunction with projector, is used in the occasions such as film, office, home theater, convention,
For showing the tool of image, video file, point a variety of specifications.Projection screen is empty in order to save office when not in use
Between, cleaning is kept, projection screen is wound.Curtain stops when in order to guarantee that projection screen raising and lowering reaches extreme position
It rotates, electric screen controller for stroke limit is often used in industry.Electric screen controller for stroke limit is for controlling projection screen
When rising or falling into place, the power-off of curtain motor stops working, while being also the limiter for adjusting the length of curtain.
Electric screen controller for stroke limit is mounted on cloth beam one end of projector curtain upper end support frame, for mechanical knot
Structure, at the both ends of screw rod, there are two nut type break contacts for setting, when cloth beam rotates, switch side-to-side movement, contact disconnected when contact
Electricity, contact position can left and right adjustings.Protection and length control device of the electric screen controller for stroke limit as projection screen, obtain
Relatively broad use, but had the following problems in use process:
1, higher cost
One limiter retail price is between 80-130 member, and cost price is also at 15 yuan or so.
2, mechanical structure high failure rate
Due to adding the mechanical structure of nut type for screw rod, it is being easy decrease of fatigue strength when used for a long time, while frequently behaviour
Make to influence vulnerable to dust, fever, and replace and be more troublesome, needs rewiring and debugging.
3, debugging is complicated
Press line unit debugging in two kinds of situation:
1 projection screen curtain is put down, and has just been stopped when not putting down curtain completely, needs the Huang that adjusting rod is inserted into limiter at this time
In color hole, people stands in the front of screen, adjusting rod is turned clockwise toward right rotation, curtain can walk downward at this time, be transferred to conjunction always
Suitable upper black surround position；
2 curtain is all put down rear motor also fail to stop when, please by the stop key of lower switch, adjusting rod is inserted into limiter
Yellow hole in, people stand in the front of screen, adjusting rod is turned counterclockwise toward anticlockwise, when going to the lower line unit by switch always
Curtain starts from the state of stopping, again can putting down curtain after allowing curtain to recycle half, by upper line unit according to the first feelings at this time
The adjusting method of condition adjusts curtain to suitable upper black surround position.
In two kinds of situation by the debugging of upper line unit:
1 by switch upper line unit, curtain lower axle it is unrecovered to outer cover when curtain just stopped, in the case that curtain is motionless,
By in the white hole of adjusting rod insertion limiter, people stands in the front of screen, adjusting rod is turned clockwise toward right rotation, at this time curtain
Cloth can be walked up, be transferred to lower axle always and close in outer cover；
Motor does not stop still after 2 curtains are all wound, by adjusting rod insertion limiter white hole in, people station screen just
Face turns adjusting rod toward anticlockwise counterclockwise, and going to curtain when by the upper line unit of switch always starts from the state of stopping, at this time
It can be adjusted according to the adjusting method of the first situation, be transferred to lower axle always and be recovered in outer cover；Debugging finishes.
It can be seen that debugging process is sufficiently complex, adjusting rod need to be used, into white hole, yellow hole, is divided suitable, counterclockwise.
Summary of the invention
For above-mentioned deficiency present in the prior art, the technical problem to be solved by the present invention is to existing projection screen highest points
Electric screen controller for stroke limit is used with minimum point limit, higher cost, high failure rate, debugging are cumbersome.
In order to solve the above technical problem, the present invention provides a kind of projection screen limit controls, including power supply, control
Device, control circuit, driving motor are mounted in the coiler shell of projection screen, and driving motor and cloth axis connection, driving motor is just
The cloth beam can wind and put exhibition curtain when reverse turn,
The control circuit both ends are separately connected the power supply and driving motor, and the control circuit includes sensor, list
Piece machine, relay and electric motor starting capacitor, sensor detect the turnning circle of the driving motor, and the single-chip microcontroller stores top
Boundary's point, lower boundary point, turnning circle, and the relay is sent a signal to, the relay controls the electric motor starting capacitor,
And rotating forward, overturning, the stopping of driving motor are finally controlled,
The controller controls the control circuit, and the controller includes upper line unit and lower line unit, and pressing line unit can
Winding, then by stopping；Pressing lower line unit can unreel, then by stopping；Line unit can record coboundary point, lower boundary point in long-pressing.
Further, the power supply is 85-265V AC power sources, and the driving motor is 220V ac synchronous motor.
Further, the controller is mounted between the control circuit and power supply by conducting wire.
Further, the controller is provided with separately battery, passes through wireless transmission between the controller and control circuit
Device transmission, the controller have transmitting terminal, and the control circuit has receiving end.
Further, the controller is integrated on projector remote controller.
Further, the radio transmitting device is one of the following: infrared, bluetooth, WIFF, Zigbee, radio frequency.
Further, security unit is installed, the security unit is fuse and falls between the power supply and controller
Power detection circuit.
Correspondingly, a kind of projection screen limit control method is provided, comprising the following steps:
1) power on, press the upper line unit and lower line unit of controller, wind the lower end of curtain in suitable coboundary,
The upper line unit and lower line unit of controller are pressed again, are stopped；
2) the upper line unit 3s or more of controller described in long-pressing stores coboundary point；
3) the lower line unit of the controller is pressed, curtain reaches suitable length or the lower end of curtain reaches bottom limit
It sets, presses the lower line unit of the controller again, stop；
4) the upper line unit 3s or more of controller described in long-pressing stores lower boundary point；
5) normal use when single-chip microcontroller receives the signal pressed again, or determines to reach coboundary point, lower boundary point,
Cut off driving motor operation.
Further, driving motor often rotates a circle, and the sensor of control circuit detects a signal, coboundary point and
Lower boundary point is divided into three phases: the rotation angle A section of coboundary o'clock to first signal, and driving motor rotates N circle and receives N
The B section of a signal, the C section of the last one signal to lower boundary point.
Further, after storing coboundary point, the single-chip microcontroller of control circuit extrapolates A according to the interval time of two signals
Section and C sections of angle, any interim point between coboundary point and lower boundary point, can calculate interim point locating for curtain lower end
Number of signals and angle between coboundary point and lower boundary point.
The beneficial effects of the present invention are:
1, cost is lower, the present invention using mature electronic component, considerably reduced original mechanical limiter at
This；
2, install, debug convenient, line is few, easy for installation, the upper line unit and lower line unit on controller press as to
It is upper or run down, it is pressed again as stopping, the above are records by line unit 3s in long-pressing, and it is simple and convenient and easy to study, facilitate curtain length
Frequently adjustment；
3, stable and reliable operation, long service life.
Detailed description of the invention
Fig. 1 is the schematic diagram that projection screen limit control of the present invention is connect with curtain, and controller is individually to set
It sets, using wireless transmission between control circuit；
Fig. 2 is the schematic illustration of projection screen limit control of the present invention；
Fig. 3 is tri- sections of schematic diagrames of A, B, C between the coboundary point and lower boundary point of limit control method of the present invention；
Fig. 4 is normal operation logic schematic diagram in limit control method of the present invention.
In figure: 1, curtain；2, coiler；3, cloth beam；4, driving motor；5, power supply；6, control circuit；7, controller；8,
Radio transmitting device；9, security unit；61, sensor；62, single-chip microcontroller；63, relay；64, electric motor starting capacitor.
Specific embodiment
Particular content of the invention is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment one:
As shown in Figure 1, a kind of projection screen limit control, including power supply 5, controller 7, control circuit 6, the power supply
5 be 85-265V AC power sources 5, and driving motor 4 is mounted in 2 shell of coiler of projection screen, and the driving motor 4 is 220V
Ac synchronous motor, driving motor 4 are connect with cloth beam 3, and the cloth beam 3 can wind and put exhibition curtain when 4 positive and negative rotation of driving motor
Cloth 1.
The controller 7 is mounted between the control circuit 6 and power supply 5 by conducting wire, as shown in Fig. 2, the control
Circuit 6 includes sensor 61, single-chip microcontroller 62, relay 63 and electric motor starting capacitor 64, and sensor 61 detects the driving motor 4
Turnning circle, the single-chip microcontroller 62 stores coboundary point, lower boundary point, turnning circle, and sends a signal to the relay
63, the relay 63 controls the electric motor starting capacitor 64, and finally controls rotating forward, overturning, the stopping of driving motor 4, institute
It states controller 7 and controls the control circuit 6, the controller 7 includes upper line unit and lower line unit, and pressing line unit can wind, then
By stopping；Pressing lower line unit can unreel, then by stopping；Line unit can record coboundary point, lower boundary point in long-pressing.
Security unit 9 is installed, the security unit 9 is fuse and detection of power loss between the power supply 5 and controller 7
Circuit.
Embodiment two:
Other parts are the same as example 1, and in addition to the connection type of controller 7 and control circuit 6, the controller 7 is single
Battery is solely had, is transmitted between the controller 7 and control circuit 6 by radio transmitting device 8, the controller 7 is with hair
End is penetrated, the control circuit 6 has receiving end, and the radio transmitting device 8 can be infrared, bluetooth, WIFF, Zigbee, radio frequency.
Embodiment three:
Other parts are the same as example 1, and in addition to the connection type of controller 7 and control circuit 6, the controller 7 collects
At on projector remote controller, transmitted between the controller 7 and control circuit 6 by radio transmitting device 8, the controller
7 have transmitting terminal, the control circuit 6 have receiving end, the radio transmitting device 8 can for infrared, bluetooth, WIFF,
Zigbee。
Correspondingly, a kind of projection screen limit control method, it is characterised in that: the following steps are included:
1) power on 5, press the upper line unit and lower line unit of controller 7, wind the lower end of curtain 1 in suitable top
Boundary presses the upper line unit and lower line unit of controller 7 again, stops；
2) the upper line unit 3s or more of controller 7 described in long-pressing stores coboundary point；
3) the lower line unit of the controller 7 is pressed, curtain 1 reaches suitable length or the lower end of curtain 1 reaches bottom
Extreme position presses the lower line unit of the controller 7 again, stops；
4) the upper line unit 3s or more of controller 7 described in long-pressing stores lower boundary point；
5) as shown in figure 4, normal use, when single-chip microcontroller 62 receives the signal pressed again, or determine to reach coboundary
Point, lower boundary point, cutting driving motor 4 are run.
Driving motor 4 often rotates a circle, and the sensor 61 of control circuit 6 detects a signal, as shown in figure 3, top
Boundary's point and lower boundary point are divided into three phases: the rotation angle A section of coboundary o'clock to first signal, and driving motor 4 rotates N
Circle receives the B section of N number of signal, the C section of the last one signal to lower boundary point.
After storing coboundary point, the single-chip microcontroller 62 of control circuit 6 extrapolates A sections and C according to the interval time of two signals
The angle of section, any interim point between coboundary point and lower boundary point locating for 1 lower end of curtain can calculate interim point distance
Number of signals and angle between coboundary point and lower boundary point.
The working principle of the invention:
Mechanical limit is changed to circuit control limit by the present invention, and the controller 7 and control circuit 6 of use, cost is 2-
3 yuan, and only by the upper line unit and downlink key control on controller 7, avoid complicated adjustment by hand.
In conclusion the present invention is using mature electronic component, cost is lower, install, debug it is convenient, it is stable, make
It is long with the service life.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, above embodiment only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand the contents of the present invention and be implemented, and it is not intended to limit the scope of the present invention, it is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the scope of protection of the present invention.
Claims (10)
1. a kind of projection screen limit control, it is characterised in that: including power supply (5), controller (7), control circuit (6), drive
Dynamic motor (4) are mounted in coiler (2) shell of projection screen, and driving motor (4) is connect with cloth beam (3), and driving motor (4) is just
The cloth beam (3) can wind and put exhibition curtain (1) when reverse turn,
Control circuit (6) both ends are separately connected the power supply (5) and driving motor (4), and the control circuit (6) includes passing
Sensor (61), single-chip microcontroller (62), relay (63) and electric motor starting capacitor (64), sensor (61) detect the driving motor
(4) turnning circle, the single-chip microcontroller (62) store coboundary point, lower boundary point, turnning circle, and send a signal to it is described after
Electric appliance (63), the relay (63) control the electric motor starting capacitor (64), and finally control driving motor (4) rotating forward,
Overturning stops,
The controller (7) controls the control circuit (6), and the controller (7) includes upper line unit and lower line unit, presses uplink
Key can be wound, then by stopping；Pressing lower line unit can unreel, then by stopping；Line unit can record coboundary point, lower boundary in long-pressing
Point.
2. a kind of projection screen limit control according to claim 1, it is characterised in that: the power supply (5) is 85-
265V AC power source (5), the driving motor (4) are 220V ac synchronous motor.
3. a kind of projection screen limit control according to claim 1, it is characterised in that: the controller (7) passes through
Conducting wire is mounted between the control circuit (6) and power supply (5).
4. a kind of projection screen limit control according to claim 1, it is characterised in that: the controller (7) is independent
With battery, transmitted between the controller (7) and control circuit (6) by radio transmitting device (8), the controller (7)
With transmitting terminal, the control circuit (6) has receiving end.
5. a kind of projection screen limit control according to claim 1 or 4, it is characterised in that: the wireless transmission dress
It sets (8) to be one of the following: infrared, bluetooth, WIFF, Zigbee, radio frequency.
6. a kind of projection screen limit control according to claim 4, it is characterised in that: the controller (7) is integrated
On projector remote controller.
7. a kind of projection screen limit control according to claim 1, it is characterised in that: the power supply (5) and control
It is equipped between device (7) security unit (9), the security unit (9) is fuse and power-fail detection circuit.
8. a kind of projection screen limit control method, it is characterised in that: the following steps are included:
1) power on (5), press the upper line unit and lower line unit of controller (7), wind the lower end of curtain (1) on suitable
The upper line unit and lower line unit of controller (7) are pressed in boundary again, stop；
2) the upper line unit 3s or more of controller described in long-pressing (7) stores coboundary point；
3) the lower line unit of the controller (7) is pressed, curtain (1) reaches suitable length or the lower end of curtain (1) reaches bottom
Extreme position presses the lower line unit of the controller (7) again, stops；
4) the upper line unit 3s or more of controller described in long-pressing (7) stores lower boundary point；
5) normal use when single-chip microcontroller (62) receives the signal pressed again, or determines to reach coboundary point, lower boundary point,
Cut off driving motor (4) operation.
9. a kind of projection screen limit control method according to claim 8, it is characterised in that: driving motor (4) every rotation
One week, the sensor (61) of control circuit (6) detected a signal, and coboundary point and lower boundary point are divided into three phases:
Rotation angle A section of the coboundary o'clock to first signal, the B section of the N number of signal of driving motor (4) rotation N circle reception, the last one
C section of the signal to lower boundary point.
10. a kind of projection screen limit control method according to claim 8 or claim 9, it is characterised in that: storage coboundary point
Afterwards, the single-chip microcontroller (62) of control circuit (6) extrapolates the angle of A sections He C sections, curtain (1) according to the interval time of two signals
Any interim point between the point of coboundary locating for lower end and lower boundary point can calculate interim point apart from coboundary point and following
Number of signals and angle between boundary's point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567290.0A CN110209006A (en) | 2019-06-27 | 2019-06-27 | A kind of projection screen limit control and limit control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910567290.0A CN110209006A (en) | 2019-06-27 | 2019-06-27 | A kind of projection screen limit control and limit control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110209006A true CN110209006A (en) | 2019-09-06 |
Family
ID=67794975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910567290.0A Pending CN110209006A (en) | 2019-06-27 | 2019-06-27 | A kind of projection screen limit control and limit control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111352291A (en) * | 2020-04-28 | 2020-06-30 | 盐城天锐先锋电子科技有限公司 | Projection curtain control method with one-key alignment function |
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2019
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| KR100668462B1 (en) * | 2004-11-11 | 2007-01-12 | (주)리츠엔 | Motor driving circuit and method of driving the same |
| CN200953092Y (en) * | 2006-09-29 | 2007-09-26 | 上海青鹰遮阳技术发展有限公司 | DC electric machine control system used to controlled object up-down control |
| CN204002258U (en) * | 2014-01-16 | 2014-12-10 | 封桂林 | One-touch remote control |
| CN205876150U (en) * | 2016-08-19 | 2017-01-11 | 王忠王 | Rolling slats door stroke stop device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111352291A (en) * | 2020-04-28 | 2020-06-30 | 盐城天锐先锋电子科技有限公司 | Projection curtain control method with one-key alignment function |
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