CN211787036U - Laser radar touch screen - Google Patents
Laser radar touch screen Download PDFInfo
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- CN211787036U CN211787036U CN202020235497.6U CN202020235497U CN211787036U CN 211787036 U CN211787036 U CN 211787036U CN 202020235497 U CN202020235497 U CN 202020235497U CN 211787036 U CN211787036 U CN 211787036U
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- laser radar
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- imaging plane
- touch screen
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Abstract
The utility model discloses a laser radar touch screen belongs to the laser radar touch control technical field, and mainly solves the problems that the touch screen in the prior art is small in size, complex in structure and difficult to popularize and apply on a large scale; comprises a projector, an imaging plane, a computer host and a computer display screen; the computer display screen is connected with the projector through a display interface and used for projecting computer pictures; the projector projects the picture of the application program onto the imaging plane to form an imaging area, and is characterized in that: the system also comprises a laser radar and a data processing module; the laser radar is fixed above the imaging plane and is connected with the computer host; the laser radar is a solid laser radar and does not contain moving parts, the data processing module runs on the computer host, receives point cloud data sent by the laser radar, detects a touch event of a user on the imaging plane after algorithm processing, and sends the touch event to an application program to complete a touch interaction function.
Description
Technical Field
The utility model belongs to the technical field of the laser radar touch-control, concretely relates to laser radar touch-sensitive screen.
Background
At present, the laser radar touch technology is not applied in the education industry at present, particularly in the traditional blackboard teaching, the blackboard teaching is always a medium for interaction between teachers and students, but in the electronic and digital teaching reform, more than 30% of classrooms are provided with electronic whiteboards and projectors, and the electronic whiteboards and the projectors play a great auxiliary role in teaching; whiteboard is a very convenient audio-visual teaching tool, but whiteboard exists not enoughly: namely, the high-cost, heavy, small-size, generally below 80 inches, and the mass above 40kg, is not waterproof, shockproof, collision-free and smashing-free. In addition, more than 95% of classrooms are equipped with projectors, and the projectors can only passively play contents, and cannot meet interactive operation in the teaching process.
Chinese patent No. 201821150790.1, entitled "a non-contact virtual touch device", provides a non-contact virtual touch device, including: the guide rail platform is vertical to the display equipment, arranged above the display equipment and connected with the bracket in a turnover manner through the rotary connecting part; one end of the guide rail, which is far away from the display equipment, is provided with a sensing camera device, and the other end of the guide rail is provided with a laser light source, wherein a laser light curtain projected by the laser light source is parallel to the surface of the display equipment. The technical scheme has more related parts, and adopts a sensing camera device, so that touch interaction is complicated, and the system cost is high;
chinese patent application No. 201910190662.2, patent name "an interactive system of integrated radar" provides an interactive system of integrated radar, and this system integration at least one radar module, and with the host computer that the radar module is connected, its characterized in that: the radar module is integrated at a fixed position of the system, and is a radar module of radio frequency signals. The technical scheme has the defects of low precision, incapability of continuously writing with fingers and incapability of continuously drawing pictures with high precision by using the fingers. The calibration is complex, the interference is easy to happen, and the user experience is poor in the actual use process. There is no simple touch interactive system on the projection screen on the market.
Disclosure of Invention
The utility model discloses a solve the less and structure complicacy of present touch-control screen size, be difficult to the problem of extensive popularization and application, provide laser radar touch-sensitive screen.
The utility model discloses a solve above-mentioned technical problem and the technical scheme who takes is:
the laser radar touch screen comprises a projector, an imaging plane, a computer host and a computer display screen; the computer display screen and the projector are connected with a display interface in a wired connection mode or a wireless connection mode to project computer pictures; the projector projects the picture of the application program onto the imaging plane to form an imaging area, and is characterized in that: the system also comprises a laser radar and a data processing module;
the laser radar is fixed above the imaging plane and is connected with the computer host in a wired connection mode or a wireless connection mode; the data processing module runs on the computer host, receives point cloud data sent by the laser radar, detects a touch event of a user on the imaging plane after algorithm processing, and sends the touch event to an application program to complete a touch interaction function.
The wired connection mode comprises an Ethernet network, a USB serial port and an RS232 serial port, and the wireless connection mode comprises Bluetooth and Wi-Fi
The laser radar is a 2D laser radar, and a transmitted light mode covers the imaging plane; when a user touches the imaging area, the optical film is blocked, and the optical film is detected by a laser radar and position coordinate information is calculated;
the laser radar is a solid laser radar and does not contain moving parts;
the angular resolution of the laser radar is less than or equal to 0.15 DEG, and the precision is 1 mm;
the laser radar is also provided with a fine adjustment mechanism, and the angle of the emitted optical film is adjusted through the fine adjustment mechanism so that the emitted optical film is parallel to the imaging plane;
the touch interaction method of the laser radar touch screen is characterized by comprising the following steps: the method comprises the following processing steps:
step one, installing a laser radar, and ensuring that an optical film emitted by the laser radar covers and is parallel to an imaging area through a fine adjustment mechanism;
secondly, acquiring point cloud data of the imaging area sent by the laser radar through a data processing module arranged in a computer host;
thirdly, filtering and clustering the point cloud data by a data processing module to extract touch point coordinates;
step four, the data processing module transforms the coordinates of the touch points to the upper surface of a display coordinate system from a laser radar coordinate system;
and step five, the data processing module sends the final touch event to the application program.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model adopts the miniaturized and low-cost solid laser radar, the mature projector, the computer PC and the like to form a touch interactive system, which is easy to be popularized and used; the solid laser radar is simple to install and debug and easy to use and maintain; the miniaturized solid-state laser radar does not contain moving parts, and the system is stable in operation and long in service life.
Drawings
Fig. 1 is a schematic structural diagram of the utility model.
Wherein: 1-computer display screen; 2-a computer host; 3-laser radar; 4-imaging plane; 5-an imaging area; 6-projector.
Detailed Description
As shown in fig. 1, the lidar touch screen includes a projector 6, an imaging plane 4, a computer host 2 and a computer display screen 1; the computer display screen 1 is connected with the projector 6 through a display interface and used for projecting computer pictures; the projector 6 projects the picture of the application program onto the imaging plane 4 to form an imaging area 5, and is characterized in that: the system also comprises a laser radar 3 and a data processing module;
the laser radar 3 is fixed above the imaging plane 4 and is connected with the computer host 2 in a wired connection mode or a wireless connection mode; the data processing module runs on the computer host 2, receives point cloud data sent by the laser radar, detects a touch event of a user on the imaging area 5 after algorithm processing, and sends the touch event to an application program to complete a touch interaction function.
The wired connection mode comprises an Ethernet network, a USB serial port and an RS232 serial port, and the wireless connection mode comprises Bluetooth and Wi-Fi.
The laser radar 3 is a 2D laser radar and emits an optical mode to cover the imaging plane 4; when a user touches the imaging area 5, the optical film is blocked, and the optical film is detected by the laser radar 3 to calculate position coordinate information;
the laser radar 3 is a solid laser radar and does not contain moving parts;
the angular resolution of the laser radar 3 is less than or equal to 0.15 degrees, and the precision is 1 mm;
the laser radar 3 is also provided with a fine adjustment mechanism, and the angle of the emitted optical film is adjusted through the fine adjustment mechanism, so that the emitted optical film is parallel to the imaging plane;
the touch interaction method of the laser radar touch screen is characterized by comprising the following steps: the method comprises the following steps:
fixing a laser radar 3 above an imaging area 5, and ensuring that an optical film emitted by the laser radar covers and is parallel to the imaging area through a fine adjustment mechanism;
secondly, acquiring point cloud data of the imaging area sent by the laser radar through a data processing module arranged in the computer host 1;
thirdly, filtering and clustering the point cloud data by a data processing module to extract touch point coordinates;
step four, the data processing module transforms the coordinates of the touch points to the upper surface of a display coordinate system from a laser radar coordinate system;
and step five, the data processing module sends the final touch event to the application program.
Claims (6)
1. The laser radar touch screen comprises a projector (6), an imaging plane (4), a computer host (2) and a computer display screen (1); the computer display screen (1) and the projector (6) are connected with a display interface in a wired connection mode or a wireless connection mode and used for projecting computer pictures; the projector (6) projects the picture of the application program onto the imaging plane (4) to form an imaging area (5), and is characterized in that: the system also comprises a laser radar (3) and a data processing module;
the laser radar (3) is fixed above the imaging plane (4) and is connected with the computer host (2) in a wired connection mode or a wireless connection mode; the data processing module runs on the computer host (2), receives point cloud data sent by the laser radar, detects a touch event of a user on the imaging area (5) after algorithm processing, and sends the touch event to an application program to complete a touch interaction function.
2. The lidar touch screen of claim 1, wherein: the wired connection mode comprises an Ethernet network, a USB serial port and an RS232 serial port, and the wireless connection mode comprises Bluetooth and Wi-Fi.
3. The lidar touch screen of claim 1, wherein: the laser radar (3) is a 2D laser radar and emits a light mode to cover the imaging plane (4); when a user touches the imaging area (5), the optical film is blocked, and the position coordinate information is detected and calculated by the laser radar (3).
4. The lidar touch screen of claim 1, wherein: the laser radar (3) is a solid laser radar and does not contain moving parts.
5. The lidar touch screen of claim 1, wherein: the angular resolution of the laser radar (3) is less than or equal to 0.15 degrees, and the precision is 1 mm.
6. The lidar touch screen of claim 1, wherein: the laser radar (3) is also provided with a fine adjustment mechanism, and the angle of the emitted optical film is adjusted through the fine adjustment mechanism, so that the emitted optical film is parallel to the imaging plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020235497.6U CN211787036U (en) | 2020-03-01 | 2020-03-01 | Laser radar touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020235497.6U CN211787036U (en) | 2020-03-01 | 2020-03-01 | Laser radar touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211787036U true CN211787036U (en) | 2020-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020235497.6U Expired - Fee Related CN211787036U (en) | 2020-03-01 | 2020-03-01 | Laser radar touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211787036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111240524A (en) * | 2020-03-01 | 2020-06-05 | 北京联控科技发展有限公司 | Laser radar touch screen |
-
2020
- 2020-03-01 CN CN202020235497.6U patent/CN211787036U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111240524A (en) * | 2020-03-01 | 2020-06-05 | 北京联控科技发展有限公司 | Laser radar touch screen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |