CN201369800Y - Smart screen system - Google Patents
Smart screen system Download PDFInfo
- Publication number
- CN201369800Y CN201369800Y CNU2009200798340U CN200920079834U CN201369800Y CN 201369800 Y CN201369800 Y CN 201369800Y CN U2009200798340 U CNU2009200798340 U CN U2009200798340U CN 200920079834 U CN200920079834 U CN 200920079834U CN 201369800 Y CN201369800 Y CN 201369800Y
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- data acquisition
- optical sensor
- acquisition box
- projection screen
- control computer
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Abstract
The utility model discloses a smart screen system, and solves the problems of inconvenient installation and maintenance, complex wiring and no capability of remote transmission of an optical sensor. A control computer (101) is connected with a projection device (102) and a data acquisition box (107); a plurality of optical sensors on a projection screen (106) are connected with at least one data acquisition box (107) through leads; an analog multiplexer of the data acquisition box (107) is connected with the optical sensors and a singlechip control circuit which is connected with a data transceiver circuit; and the data transceiver circuit is connected with the control computer.
Description
Technical field:
The utility model relates to a kind of smart screen system that is applied to seamless projection automatic geometric correction, particularly a kind of being applied to based on the smart screen system in the optical sensor automatic geometric correction method.
Background technology:
Technological difficulties of image splicing are exactly through after the reflection of projection screen, the projection meeting generation geometric distortion of originally normal image.The image and the original image that want spectators are seen are consistent, and just must carry out geometric correction.
There is automatic geometric correction that a kind of technical scheme is based on optical sensor (for example, referring to document 1: U.S. Patent number 7001023), it at first installs a series of optical sensor in the precalculated position on projection screen, demarcates the position that being projected in of grid control point expected on the projection screen according to the space coordinates at optical sensor place.When projection screen was on-plane surface, for example large-scale cylinder, sphere and ellipsoid etc. then need be installed a large amount of intensive optical sensors on projection screen, to improve the precision of control mesh.
The space coordinates of optical sensor need be calculated by the control computer.The signal histories that control Computer Analysis optical sensor is accepted illumination at every turn and produced is determined the space coordinates of optical sensor with this, and to according to this coordinate original image being carried out geometry conversion in advance, the image after the conversion is projected on the projection screen through projector equipment.
Usually between control computer and the projection screen at a distance of about 10 meters, it is analog signal that optical sensor is accepted the signal that illumination produces, and decays along with the increase of transmission line.Therefore, need to consider a kind of scheme that the signal that makes optical sensor accept the illumination generation is sent to the control Computer Processing effectively.Because the transmission of digital signal can be along with Line Attenuation, therefore the analog signal that earlier optical sensor is produced changes into digital signal by a kind of data acquisition equipment, data acquisition equipment sends by the RS485 interface thus again, and the signal long-distance that can solve the optical sensor generation effectively transfers to the problem of control computer.
Existing optical sensor, installation, dismounting and change inconvenience, each optical sensor directly is connected with the control computer, and each projection screen need be installed a lot of optical sensors, and wiring is complicated, the wiring installation performance difficulty.
The utility model content:
The purpose of this utility model provides a kind of optical sensor that carries, and the optical sensor wiring easily, installs, it is convenient to dismantle, change, and the signal of generation can be grown Distance Transmission, the smart screen system that transmission speed is fast.
The utility model is achieved in that
The utility model multi-path data acquiring system, control computer 101 is connected with at least one data acquisition box 107 with at least one projector equipment 102 respectively, there are some optical sensors to be connected with at least one data acquisition box 107 on the projection screen 106 by lead, data acquisition box 107 has analog multiplexer to be connected with single chip machine controlling circuit with optical sensor, single chip machine controlling circuit is connected with the data transmit-receive circuit, and the data transmit-receive circuit is connected with the control computer.
Single chip machine controlling circuit has 8 AD converting units of 5 passages to be connected with analog multiplexer with serial ports.
Optical sensor is made up of optical fiber 203, sensor devices 204 and printed circuit board 209, optical fiber is arranged in the perforation 202 of projection screen and takes its inner used space, sensor devices is close to the outlet of perforation 202 back sides, its positive and negative pin and printed circuit board welding, printed circuit board is connected with data acquisition box by lead, and there is light transmission film 108 in the front of perforation 202.
The utility model smart screen system, control computer 101 is connected with at least one data acquisition box 107 with at least one projector equipment 102 respectively, there are some optical sensors to be connected with at least one data acquisition box 107 on the projection screen 106 by lead, data acquisition box 107 is connected with single chip machine controlling circuit with optical sensor by analog multiplexer, single chip machine controlling circuit is connected with the data transmit-receive circuit, and the data transmit-receive circuit is connected with the control computer.
Single chip machine controlling circuit has 8 AD converting units of 5 passages to be connected with analog multiplexer with serial ports.
Optical sensor is made up of optical fiber 203, sensor devices 204 and printed circuit board 209, optical fiber is arranged in the perforation 202 of projection screen and takes its inner used space, sensor devices is close to the outlet of perforation 202 back sides, its positive and negative pin and printed circuit board welding, printed circuit board is connected with data acquisition box by lead, and there is light transmission film 108 in the front of perforation 202.
Accept illumination from optical sensor and produce analog signal, convert digital signal to and be sent to the control computer through data acquisition box to analog signal, again by the space coordinates of controlling the Computer Analysis optical sensor, output image is carried out the pre-conversion output of geometry, this complex process is all finished under computer control automatically, only needs the time in general several seconds.Than present perspective geometry alignment technique, this scheme operation is simple and easy, need not the expert technician after construction is finished and safeguards, has shortened engineering construction time and later maintenance cost greatly.
The utility model has following advantage:
1, can use various optical sensors, optical sensor can directly be pasted or be fixed in the projection screen back side with the form of screw, and it is very convenient to change dismounting.
2, data collecting cassette can carry out the collection of simulant signal of No. 32 optical sensors simultaneously, uses the form of several data acquisition equipment parallel connections just can finish the enforcement of an engineering, has reduced the complexity of whole engineering wiring.
3, optical sensor is accepted the analog signal that illumination produces and is converted digital signal to through data acquisition box, and transfers to the control computer by the hardware driving interface of data acquisition box, and required time is very short, has greatly improved the speed of projection automatic geometric correction.
Description of drawings
Fig. 1 is a structure chart of the present utility model.
Fig. 2 is the circuit diagram of data acquisition box.
Fig. 3 is the optical sensor structure chart.
Fig. 4 is the mounting structure figure of projection screen and optical sensor.
Fig. 5 is the connection layout of optical sensor, data acquisition box and multi-serial-port card.
Fig. 6 is a plurality of data acquisition box power supply schematic diagrames.
Embodiment
Optical sensor is passed projection screen, and be fixed in the projection screen back side.The positive one deck light diffusion film of laying of curtain.
Data acquisition box comprises analog multiplexer, single chip machine controlling circuit, RS485 data transmit-receive circuit.Be used for gathering the analog signal of smart screen system optical sensor.
Multi-serial-port card is inserted on the PCI slot of control computer.Be used for the expansion of a plurality of data acquisition boxs.
When projector equipment to the smart screen projection light when the signal, place the optical sensor of smart screen to accept the illumination signal, and produce analog electrical signal, this signal transfers to data acquisition box by signal transmssion line.By data acquisition box signal is sent to the control computer again.Owing to need a large amount of intensive optical sensors in the smart screen system, therefore need a plurality of data acquisition boxs just can finish collection to all photosensor signal.A plurality of data acquisition boxs need be connected with the control computer by a kind of multi-serial-port card.
The know-why of whole smart screen system works is: the optical sensor in the screen system inserts the analog multiplexer of data acquisition box by transmission line, the analog/digital conversion unit in the single-chip microcomputer is received in the output of analog multiplexer, the analog/digital conversion unit carries out mould/number conversion to the analog electrical signal of each optical sensor successively under the control of single-chip microcomputer, and the data after will changing are temporarily stored in the middle of the sheet stored unit of single-chip microcomputer.When the control computer sends the read data instruction, single-chip microcomputer will be temporarily stored in the data of its internal storage unit and take out, and, read the digital signal that each optical sensor of sign is subjected to intensity of illumination by controlling the hardware driving interface of computer again by multi-serial-port card by the corresponding serial ports that RS485 data transmit-receive circuit is given multi-serial-port card in the control computer PCI slot by transmission line.The control computer calculates their coordinates in projected coordinate system according to the signal histories of the optical sensor that collects, and with its expection coordinate as the control point of geometric correction grid on projection screen.
The connection of optical sensor, data acquisition box and multi-serial-port card as shown in Figure 5.
Critical piece of the present utility model is a data acquisition box, and this equipment comprises analog multiplexer, modulus sample conversion device, single chip machine controlling circuit, circuit such as RS485 data transmit-receive.Analog multiplexer adopts the ADG732 of ADI company, can support the input of 32 tunnel analog signals; Single chip machine controlling circuit adopts the single-chip microcomputer of Microchip company, and its device model PIC16F77 is with 8 AD converting units of 5 passages, 1 serial ports; RS485 data transmit-receive circuit adopts the interface chip MAX3227 of MAXIM company, maximum data transfer rate 1Mbps; Adopt the X075 series crystal oscillator of JFVNY; Power supply chip adopts the TPS series of TI company.The circuit diagram of data acquisition box as shown in Figure 2.
As shown in Figure 1, a whole set of optical projection system is made up of six big elements: control computer 101, projector equipment 102, target projection curtain 106, light diffusion film 108, optical sensor are as 103,104 and 105 etc. and data acquisition box 107.In the geometric correction process, they play a role successively according to clockwise direction, have formed a complete closed-loop control system.After geometric correction finished, the control computer switched to projection mode, and this moment, it carried out the pre-conversion of geometry to the original image 112 of input, and exported result images to projector equipment 102.
If the view field of expectation is whole projection screen 106, just more optical sensor need be installed on projection screen 106, for example 103,104 and 105.The installation site of all optical sensors on projection screen 106 all is known and do not rely on original image 100 that their particular location is decided according to the actual conditions of projection screen 106.
The binding post 208 of each sensor devices and 207 is connected to the input 301 of data acquisition box 107 by lead 300, the corresponding optical sensor of each input.Data acquisition box 107 constantly refreshes the analog signal of the current output of each optical sensor.When control computer 101 need read the illumination signal of certain optical sensor, data acquisition box 107 can be exported to control computer 101 with the analog signal of this optical sensor by a multi-serial-port card on the control computer.Like this, control computer 101 just can read any optical sensor at any time be subjected to light state.Here, data acquisition box 107 can be linked into by the mode of parallel connection on the multi-serial-port card of control computer.
As shown in Figure 3, optical sensor is made up of three parts: optical fiber 203, sensor devices 204, printed board 209.Optical fiber 203 is placed in the perforation 202 just fully, and takes its inner all space, and light is conducted to the back side from 202 the front (illustrated left) of boring a hole.Sensor devices 204 is close to the exit at perforation 202 back sides, sensitive surface is subjected to the just throwing irradiation of the next light of optical fiber conduction, and with the form of the analog signal of suffered voltage, be respectively welded to welding hole 205 and 206 in the printed board 209 by its both positive and negative polarity pin 200 and 201, and characterize the analog signal of the positive suffered intensity of illumination of perforation 202 by binding post 208 and 207 outputs, binding post 208 and 207 with data acquisition box between be connected by lead.
As shown in Figure 4, optical sensor, for example 104, be installed in the perforation 202 on the projection screen 106.The corresponding perforation of optical sensor.Here it should be noted that perforation 202 is cylindrical, and the round mouth diameter should be as far as possible little, usually below 1 millimeter.Like this, perforation is difficult to be found by spectators at a distance 111 on the one hand on the front of projection screen 106, it can be counted as a sub-pix point in the projected coordinate system of projector equipment 102 on the other hand, also just can make the coordinate values of optical sensor reach the precision of sub-pixel.
As shown in Figure 5, the external interface of data acquisition box 107 is divided into two kinds of input and output.Input is a plurality of (can consider 32 tunnel under the not high situation of cost), the corresponding optical sensor 405 of each port.Several photophores are arranged on the surface of multi-channel data acquisition box 107, and whether the optical sensor 405 that is used to indicate the corresponding end mouth to be connected has been connected, as photophore 401 corresponding inputs 400.Luminous representative is communicated with, and not luminous representative is not communicated with.The other end at data acquisition box has an output, is connected to the multi-serial-port card of controlling in the computer PCI slot 404 by serial ports.Data acquisition box 107 is finished the interactive communication of all and computer by serial ports 402.Data acquisition box 107 needs external power source, and a plurality of data acquisition boxs adopt the parallel way power supply, and cumulative volume and floor space are little.
As shown in Figure 6, a plurality of data acquisition boxs insert power supply adaptor respectively, and power supply adaptor adopts the ac power supply of 220V.
In Fig. 1 and Fig. 3, one deck light transmission film 108 that covers the front surface of projection screen 106 has played the effect of light diffusion, and the light refraction that it receives projection screen 106 fronts goes into to be hidden among the optical fiber in the perforation.Do the benefit of two aspects like this: the first, it can hide the perforation that is used to install optical sensor on the projection screen 106, and the projection screen that spectators are seen is the level and smooth curved surface of a monoblock.The second, it can also also be reflected into low-angle (less than the 1 degree) light of incident in the perforation, even like this under the very little extreme case of the angulation in projector equipment 102 and projection screen 106 fronts, optical sensor also can be worked normally.
Claims (3)
1, smart screen system, it is characterized in that controlling computer (101) is connected with at least one data acquisition box (107) with at least one projector equipment (102) respectively, there are some optical sensors to be connected with at least one data acquisition box (107) on the projection screen (106) by lead, data acquisition box (107) has analog multiplexer to be connected with single chip machine controlling circuit with optical sensor, single chip machine controlling circuit is connected with the data transmit-receive circuit, and the data transmit-receive circuit is connected with the control computer.
2, system according to claim 1 is characterized in that single chip machine controlling circuit has 8 AD converting units of 5 passages to be connected with analog multiplexer with serial ports.
3, system according to claim 1, it is characterized in that optical sensor is made up of optical fiber (203), sensor devices (204) and printed circuit board (209), optical fiber is arranged in the perforation (202) of projection screen and takes its inner used space, sensor devices is close to the outlet of perforation (202) back side, its positive and negative pin and printed circuit board welding, printed circuit board is connected with data acquisition box by lead, and there is light transmission film (108) in the front of perforation (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200798340U CN201369800Y (en) | 2009-03-27 | 2009-03-27 | Smart screen system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200798340U CN201369800Y (en) | 2009-03-27 | 2009-03-27 | Smart screen system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201369800Y true CN201369800Y (en) | 2009-12-23 |
Family
ID=41488687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200798340U Expired - Fee Related CN201369800Y (en) | 2009-03-27 | 2009-03-27 | Smart screen system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201369800Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957369A (en) * | 2013-12-27 | 2014-07-30 | 合肥市艾塔器网络科技有限公司 | Self-adaptive projection screen side control circuit |
| WO2015109671A1 (en) * | 2014-01-24 | 2015-07-30 | 京东方科技集团股份有限公司 | Projection system and remote control method thereof |
| CN104869336A (en) * | 2013-12-27 | 2015-08-26 | 合肥市艾塔器网络科技有限公司 | Adaptive projection control system and method thereof |
| WO2017107969A1 (en) * | 2015-12-24 | 2017-06-29 | 深圳市绎立锐光科技开发有限公司 | Projection device, projection system, and calibration method therefor |
-
2009
- 2009-03-27 CN CNU2009200798340U patent/CN201369800Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957369A (en) * | 2013-12-27 | 2014-07-30 | 合肥市艾塔器网络科技有限公司 | Self-adaptive projection screen side control circuit |
| CN104869336A (en) * | 2013-12-27 | 2015-08-26 | 合肥市艾塔器网络科技有限公司 | Adaptive projection control system and method thereof |
| WO2015109671A1 (en) * | 2014-01-24 | 2015-07-30 | 京东方科技集团股份有限公司 | Projection system and remote control method thereof |
| US9753643B2 (en) | 2014-01-24 | 2017-09-05 | Boe Technology Group Co., Ltd. | Projection screen, remote control terminal, projection device, display device, projection system and remote control method for projection system |
| WO2017107969A1 (en) * | 2015-12-24 | 2017-06-29 | 深圳市绎立锐光科技开发有限公司 | Projection device, projection system, and calibration method therefor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091223 Termination date: 20150327 |
|
| EXPY | Termination of patent right or utility model |