CN204010401U - Infrared teacher's pointer system - Google Patents
Infrared teacher's pointer system Download PDFInfo
- Publication number
- CN204010401U CN204010401U CN201420179939.4U CN201420179939U CN204010401U CN 204010401 U CN204010401 U CN 204010401U CN 201420179939 U CN201420179939 U CN 201420179939U CN 204010401 U CN204010401 U CN 204010401U
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- infrared
- teacher
- pointer
- demonstration board
- camera
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Abstract
The utility model relates to infrared detection technology field, relates in particular to a kind of infrared teacher's pointer system.This system comprises for presentation graphic being projected to the projector on demonstration board; For carry out the teacher's pointer of reading on described demonstration board, top is provided with and can launches ultrared infrared transmitting device to the position of its reading on described demonstration board; The ultrared camera being reflected back for receiving the position of the above teacher's pointer reading of described demonstration board; Described camera can be identified infrared light and visible ray; On described camera, be provided with two switchable, optical filters for filtering entering the light of described camera; In two optical filters, one of them can only pass through infrared light, and another can only pass through visible ray.Infrared teacher's pointer system provided by the utility model, both can calibrate by visible ray, also can calibrate by infrared light.
Description
Technical field
The utility model relates to infrared detection technology field, relates in particular to a kind of infrared teacher's pointer system.
Background technology
Infrared teacher's pointer system generally all comprises video camera, projector and matching used infrared teacher's pointer.Its basic principle of work is: the presentation graphic that infrared teacher's pointer projects on demonstration board projector is carried out reading, simultaneously, infrared teacher's pointer top can be to the position transmitting infrared ray of its reading on demonstration board, infrared ray enters video camera after the position reflection of its reading on demonstration board, system can detect the position of this infrared signal on demonstration board after receiving infrared signal, thereby detects the position of operator institute reading.In order to reduce the interference of visible ray to camera receiving infrared-ray, existing common practice is on camera, to install optical filter additional.This optical filter only allows infrared light to pass through, and does not allow other light to pass through, thereby has reduced interference, has strengthened detection sensitivity.But, this mode has also caused camera can not identify visible light signal simultaneously, and then cause teacher's pointer system can only receive infrared light by camera when calibrating carrying out manual analog calibration, and can not receive the visible images with calibration function that projector sends by camera, carry out automatic calibration.
Utility model content
Technical problem to be solved in the utility model is, a kind of infrared teacher's pointer system is provided, and it both can be calibrated by visible ray, also can calibrate by infrared light.The utility model is achieved in that a kind of infrared teacher's pointer system, comprising:
For presentation graphic is projected to the projector on demonstration board;
For carry out the teacher's pointer of reading on described demonstration board, top is provided with and can launches ultrared infrared transmitting device to the position of its reading on described demonstration board;
The ultrared camera being reflected back for receiving the position of the above teacher's pointer reading of described demonstration board;
Described camera can be identified infrared light and visible ray; On described camera, be provided with two switchable, optical filters for filtering entering the light of described camera; In two optical filters, one of them can only pass through infrared light, and another can only pass through visible ray.
Further, described two optical filters switch by electromagnetism.
Compared with prior art, infrared teacher's pointer system provided by the utility model, can select to enter the light of camera as required flexibly.When normal use, be switched to the optical filter that only allows infrared light to pass through, thereby reduced the interference of visible ray, improved system to the sensitivity of reading position probing and accuracy, when calibrating, be switched to the optical filter that only allows visible ray to pass through, thereby make system can utilize the visible ray calibration picture that projector projection goes out to carry out automatic calibration.
Accompanying drawing explanation
Fig. 1: the infrared teacher's pointer system architecture that the utility model provides and use schematic diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.
Fig. 1 shows the structure of the infrared teacher's pointer system that the utility model provides and uses schematic diagram.
Shown in Fig. 1, this infrared teacher's pointer system comprises:
Projector 1, for projecting to demonstration board 5 by presentation graphic (shown in accompanying drawing 1 solid line);
Teacher's pointer 3, for carry out reading on demonstration board 5, its top is provided with can be to the infrared transmitting device 301 of the position O transmitting infrared ray of its reading on demonstration board 5 (in accompanying drawing 1 shown in dotted line).
The camera 2 of the infrared ray (shown in accompanying drawing 1 dotted line) being reflected back for the position O that receives teacher's pointer 3 readings on demonstration board 5;
Camera 2 can be identified infrared light and visible ray, is provided with two switchable, optical filters 4 for filtering entering the light of camera 2 on camera 2; In two optical filters 4, one of them can only pass through infrared light, and another can only pass through visible ray.Two optical filters 4 can switch by electromagnetic mode.
Above-mentioned infrared teacher's pointer system, its work is excessively as follows:
During normal use, camera 2 is switched to the optical filter 4 that only allows infrared light to pass through.Projector 1 projects to presentation graphic on demonstration board 5, and then, teacher's pointer 3 carries out reading to presentation graphic on demonstration board 5.During reading, the infrared transmitting device 301 on teacher's pointer 3 tops is to the position O transmitting infrared ray of its reading on demonstration board 5, and infrared ray receives through the reflection quilt camera 2 of the position O of its reading.What camera 2 received is in fact a width infrared image, in this infrared image, has the infrared signal of a position to be obviously better than the infrared signal of other positions, and this position is the position of 3 readings of teacher's pointer.The presentation graphic that infrared image and the projection of projector institute go out matches, and the position of this position in infrared image represent the position of teacher's pointer 3 institute's reading in presentation graphic.Therefore, system is mated this position with the presentation graphic of projector institute projection, can detect the position of teacher's pointer 3 reading in presentation graphic.
During calibration, camera 2 is switched to the optical filter 4 that only allows visible ray to pass through.Projector 1 goes out a width visible ray calibration picture to projection on demonstration board 5.On this calibration picture, there is direction and position identification information.System detects this width calibration picture by camera 2, and carries out automatic calibration according to direction and position identification information on calibration picture.
The infrared teacher's pointer system that the utility model provides, broken away from and need on demonstration board 5, carry out by teacher's pointer 3 the simulation reading of diverse location, then the manual calibration mode of the infrared signal of the diverse location reflection by 3 readings of camera 2 identification teacher's pointers to calibrate.Certainly, if necessary, native system still can be calibrated system by aforesaid manual calibration mode.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (2)
1. an infrared teacher's pointer system, is characterized in that, comprising:
For presentation graphic is projected to the projector on demonstration board;
For carry out the teacher's pointer of reading on described demonstration board, top is provided with and can launches ultrared infrared transmitting device to the position of its reading on described demonstration board;
The ultrared camera being reflected back for receiving the position of the above teacher's pointer reading of described demonstration board;
Described camera can be identified infrared light and visible ray; On described camera, be provided with two switchable, optical filters for filtering entering the light of described camera; In two optical filters, one of them can only pass through infrared light, and another can only pass through visible ray.
2. infrared teacher's pointer system as claimed in claim 1, is characterized in that, described two optical filters switch by electromagnetism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179939.4U CN204010401U (en) | 2014-04-14 | 2014-04-14 | Infrared teacher's pointer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420179939.4U CN204010401U (en) | 2014-04-14 | 2014-04-14 | Infrared teacher's pointer system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204010401U true CN204010401U (en) | 2014-12-10 |
Family
ID=52050367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420179939.4U Expired - Fee Related CN204010401U (en) | 2014-04-14 | 2014-04-14 | Infrared teacher's pointer system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204010401U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110765998A (en) * | 2019-10-25 | 2020-02-07 | 汉王科技股份有限公司 | Hand-held reader |
| CN110826347A (en) * | 2019-10-25 | 2020-02-21 | 汉王科技股份有限公司 | Handheld reader and reading control method and device thereof |
| CN112699870A (en) * | 2020-12-22 | 2021-04-23 | 深圳Tcl数字技术有限公司 | Point reading identification method, terminal, system and computer readable storage medium |
-
2014
- 2014-04-14 CN CN201420179939.4U patent/CN204010401U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110765998A (en) * | 2019-10-25 | 2020-02-07 | 汉王科技股份有限公司 | Hand-held reader |
| CN110826347A (en) * | 2019-10-25 | 2020-02-21 | 汉王科技股份有限公司 | Handheld reader and reading control method and device thereof |
| CN110765998B (en) * | 2019-10-25 | 2020-11-20 | 汉王科技股份有限公司 | Hand-held reader |
| CN110826347B (en) * | 2019-10-25 | 2020-12-11 | 汉王科技股份有限公司 | Handheld reader and reading control method and device thereof |
| CN112699870A (en) * | 2020-12-22 | 2021-04-23 | 深圳Tcl数字技术有限公司 | Point reading identification method, terminal, system and computer readable storage medium |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20210414 |