CN2676276Y - Coordinates and control information input device possessing high speed signal transmission capacity - Google Patents
Coordinates and control information input device possessing high speed signal transmission capacity Download PDFInfo
- Publication number
- CN2676276Y CN2676276Y CNU2003201204056U CN200320120405U CN2676276Y CN 2676276 Y CN2676276 Y CN 2676276Y CN U2003201204056 U CNU2003201204056 U CN U2003201204056U CN 200320120405 U CN200320120405 U CN 200320120405U CN 2676276 Y CN2676276 Y CN 2676276Y
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- information input
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Abstract
The utility model relates to a device which transmits coordinates and control information to computer, and the utility model belongs to the technical field of computer attachment. This device comprises a light pen and a signal reception processor. The light pen comprises a carrier pulse-generating circuit controlled by a key switch. The signal reception processor is composed of an optical signal reception processing circuit and a data interface connected with the computer, wherein, the light pen also comprises a carrier light emitting device. The signal reception processor also comprises a carrier optical receiving component which is connected with a decipher circuit and a signal processing circuit. The utility model overcomes the existing insufficiency of the prior art, the transmission speed of the control signal is fast, the anti-interference ability is strong, and the performance is reliable.
Description
Technical field
The utility model relates to a kind of coordinate and control information input media, and especially a kind of device to computing machine transmission of coordinate and control information belongs to the computer annex technical field.
Background technology
Application number is that 99114502.x and application number are the method and system that 01108047.7 Chinese patent application successively discloses a kind of optoelectronic position input.Its cardinal principle is to adopt luminous point indicating target position, obtain image and analyze the position of luminous point with camera, then data are sent to computing machine by interface, utilize computer software to carry out the further analysis of signal, and carry out alternately with computer operating system.More than the fundamental purpose of existing invention is directly to send signal by light pen or teacher's pointer to realize the mouse action function on the computer projection screen, on this basis, can also further be used for realizing virtual mark and writing.Also described the method that control signal sends in 01108047.7 patented claim, promptly made light pen send different length and pulse at interval when the beginning that the light pen button is pressed, different pulse trains can be distinguished different key.
The applicant finds in practice, above prior art is owing to need come received signal by camera, promptly the continuous appearing and subsiding number of times according to luminous point in the camera picture obtains pulse length and information at interval, so the length at pulse and interval must be greater than the camera exposure cycle.For the video reception of per second 50 frames, pulse and gap length must be greater than 20 milliseconds.So just caused the signal pulse sequence time much larger than 20 milliseconds, made system responses that bigger time-delay be arranged.If be blocked at the moment light that button is pressed simultaneously, will make the one-touch operation invalid.In addition in interpulse period owing to do not have luminously will lose locating information.
Summary of the invention
The purpose of this utility model is: at the shortcoming of above prior art existence, a kind of coordinate and control information input media with high speed transmission of signals ability proposed, this device should be imported under the impregnable situation in the position, periodically and transmit control information such as button apace.
In order to reach above purpose, the coordinate and the control information input media that the utlity model has the high speed transmission of signals ability are made up of light pen and signal receiving processor, contain the carrier pulse generation circuit that is controlled by keyswitch in the described light pen, comprise light signal receiving processing circuit and the data-interface that connects computing machine in the described signal receiving processor, wherein also contain the carrier wave light emitting devices in the light pen, also comprise the carrier wave light receiving element that connects decoding circuit in the described signal receiving processor, described decoding circuit also connects signal processing circuit.
Two kinds of feasible concrete schemes are arranged in the enforcement, and promptly light-emitting tube only adopts one or one group of luminotron (for example infrared transmitting tube), and this luminotron both had been used to refer to the position and has also sent signal; Another kind is to adopt luminotron (for example infrared transmitting tube) to carry out the transmission of push button signalling, and another group luminescent device (as red LED) is used to refer to the position.The situation of signal processor is corresponding with it.
Like this, adopt the method be similar to Infrared remote controller to carry out signal and send, promptly on tens of KHz carrier waves modulation period short corresponding to the coded signal of button driving infrared transmitting tube, and signal is sent repeatedly.Infrared receiving tube in the receiving processor and circuit can receive and decode and obtain corresponding key information.Its advantage is: 1. because carrier frequency is higher, can make the signal period very short, response speed is guaranteed.Since signal send repeatedly, so both just part-time light be blocked, as long as receiver can receive light and then just can obtain key information.3. because modulating pulse is very short with respect to the camera sampling period, therefore both just adopted same infrared transmitting tube to come indicating positions and transmission signal, also can not receive by impact position.4. hardware cost increases less.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is the light pen circuit theory diagrams of an embodiment of the utility model.
Fig. 2 is the signal receiving processor synoptic diagram of an embodiment of the utility model.
Embodiment
Embodiment one
The coordinate with high speed transmission of signals ability and the control information input media of present embodiment are made up of light pen and signal receiving processor.Light pen as shown in Figure 1, U1 is a microcontroller PIC12F675, K0, K1, K2 are three keyswitches that control D1 goes up output waveform, are connected respectively to 7,6,4 three pins of U1.Since respectively by R1, R2, R3 ground connection, these three pins are low level under the normality.When some buttons were pressed, its corresponding U1 pin was pulled to high level, and U1 judges the pin that is pressed according to the variation of pin level, with the output waveform of control output pin 2.Q1 is a triode, is used to drive D1.D1 is an infrared transmitting tube.R4 has determined the size of current of D1.First effect of D1 is to carry out carrier signal to send, and handles for the reception of the infrared receiving module in the receiver, and second effect of D1 is to indicate current position to receive processing for the camera of receiver.C is a filter capacitor.In order to increase luminosity, D1 can increase drive current simultaneously with one group of identical luminotron replacement in parallel.
Work as K0, K1, when K2 was pressed, the output waveform of U1 the 2nd pin was respectively:
K0: open 3ms-and close 1ms.....
K1: open 4ms-and close 1ms.....
K2: open 5ms-and close 1ms.....
More than ' opening ' expression output 38Khz carrier signal, ' passs ' expression stops to export.
The signal receiving processing circuit of present embodiment as shown in Figure 2, wherein 1 is a common infrared receiving module, model is FRP-4052H, it has realized worker's energy such as reception, amplification, demodulation of infrared signal.When receiving the infrared carrier signal of 38Khz, its output terminal will be exported high level, when not receiving carrier signal, and output low level.Its output is connected to decoding circuit 3.Decoding circuit is a circuit that is made of single chip microcontroller PIC12F675, its the 7th pin is programmed to input pin, be connected to the output of infrared receiving module 1,2nd, 4 pin are programmed to output pin, be connected to signal processing circuit 4, when detecting infrared receiving module output corresponding to the waveform of light pen K0, K1, K2 button, the output of 2,4 pin is respectively 00,01,10.2 is black and white CMOS cameras, and its signal output is connected to signal processing circuit 4.The 5th, interface device can link to each other with computing machine by this interface.
The design of relevant camera, signal processing circuit, interface is same as the prior art, and just signal processing circuit also will receive the signal of decoding circuit 3, and needs to comprise the output level information of decoding circuit 3 in the data stream of its output.
The installation site of infrared receiving module is in the place ahead of receiver, and for example in the side of camera, and receive direction is identical with the camera receive direction.Can receive the light signal that light pen sends most effectively like this.
Experiment showed, that present embodiment has the coordinate of high speed transmission of signals ability and the deficiency that the control information input media has overcome the prior art existence, signaling rate is fast, antijamming capability is strong, dependable performance.
Claims (5)
1. a coordinate and control information input media with high speed transmission of signals ability, form by light pen and signal receiving processor, contain the carrier pulse generation circuit that is controlled by keyswitch in the described light pen, comprise light signal receiving processing circuit and the data-interface that connects computing machine in the described signal receiving processor, it is characterized in that: also contain the carrier wave light emitting devices in the described light pen, also comprise the carrier wave light receiving element that connects decoding circuit in the described signal receiving processor, described decoding circuit also connects signal processing circuit.
2. according to described coordinate and the control information input media with high speed transmission of signals ability of claim 1, it is characterized in that: described light emitting devices also sends the luminotron of signal for both indicating positions.
3. state coordinate and the control information input media with high speed transmission of signals ability according to claim 1, it is characterized in that: described light emitting devices comprises and carries out the luminotron that signal sends and the luminescent device of indicating positions.
4. according to claim 2 or 3 described coordinate and control information input medias with high speed transmission of signals ability, it is characterized in that: the described luminotron that carries out the signal transmission is an infrared transmitting tube.
5. according to described coordinate and the control information input media with high speed transmission of signals ability of claim 4, it is characterized in that: the carrier wave light receiving element in the described signal receiving processor is an infrared receiving module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201204056U CN2676276Y (en) | 2003-11-05 | 2003-11-05 | Coordinates and control information input device possessing high speed signal transmission capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2003201204056U CN2676276Y (en) | 2003-11-05 | 2003-11-05 | Coordinates and control information input device possessing high speed signal transmission capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2676276Y true CN2676276Y (en) | 2005-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2003201204056U Expired - Fee Related CN2676276Y (en) | 2003-11-05 | 2003-11-05 | Coordinates and control information input device possessing high speed signal transmission capacity |
Country Status (1)
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| CN (1) | CN2676276Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135842A (en) * | 2011-04-06 | 2011-07-27 | 南京方瑞科技有限公司 | Synchronous light pen electronic whiteboard system |
| CN106933385A (en) * | 2017-03-08 | 2017-07-07 | 吉林大学 | A kind of implementation method of the low-power consumption sky mouse pen based on three-dimensional ultrasonic positioning |
| CN106933390A (en) * | 2017-03-08 | 2017-07-07 | 吉林大学 | Stylus position and posture detection method and system that inertial technology and ultrasonic wave are combined |
-
2003
- 2003-11-05 CN CNU2003201204056U patent/CN2676276Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102135842A (en) * | 2011-04-06 | 2011-07-27 | 南京方瑞科技有限公司 | Synchronous light pen electronic whiteboard system |
| WO2012136084A1 (en) * | 2011-04-06 | 2012-10-11 | 南京方瑞科技有限公司 | Synchronous light pen electronic whiteboard system |
| CN102135842B (en) * | 2011-04-06 | 2013-02-27 | 南京方瑞科技有限公司 | Synchronous light pen electronic whiteboard system |
| US9207783B2 (en) | 2011-04-06 | 2015-12-08 | Nanjing Frentec Co., Ltd. | Synchronous light pen electronic whiteboard system |
| CN106933385A (en) * | 2017-03-08 | 2017-07-07 | 吉林大学 | A kind of implementation method of the low-power consumption sky mouse pen based on three-dimensional ultrasonic positioning |
| CN106933390A (en) * | 2017-03-08 | 2017-07-07 | 吉林大学 | Stylus position and posture detection method and system that inertial technology and ultrasonic wave are combined |
| CN106933385B (en) * | 2017-03-08 | 2019-05-28 | 吉林大学 | A kind of implementation method of the low-power consumption sky mouse pen based on three-dimensional ultrasonic positioning |
| CN106933390B (en) * | 2017-03-08 | 2019-12-31 | 吉林大学 | Stylus position and posture detection method and system combining inertia technology and ultrasonic waves |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |