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Laser radar based floating touch system

A lidar and floating touch technology, applied in the field of human-computer interaction, can solve the problems of limited detection volume and decreased positioning accuracy, and achieve the effect of expanding detection volume and improving interactive experience.

Inactive Publication Date: 2016-02-24
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the volume and power limitations of the lidar receiving sensor, the effective detection radius is only 3m, and the formed scanning surface is a semicircle with a radius of 3m. The positioning accuracy of the area far from the detection device will decrease, and the detection amount is limited.

Method used

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  • Laser radar based floating touch system
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  • Laser radar based floating touch system

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Experimental program
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Embodiment Construction

[0022] figure 1 It is a schematic diagram of the existing lidar hover touch human-computer interaction system. The lidar floating touch human-computer interaction system in the prior art includes a lidar detection device 1 , a control host 2 and a display screen 3 , wherein the lidar detection device 1 is connected to the control host 2 .

[0023] The laser radar detection device 1 is located at a viewing distance, that is, the laser radar detection device 1 is in front of the display screen 3 , separated from the display screen 3 by a specified distance, and within a range that is convenient for the user to touch with fingers or other objects. The laser radar detection device 1 forms a radial laser scanning surface 11 , detects the blocking information of the laser by the user's fingers or other objects used to determine the polar coordinate information of the touch point 12 , and transmits the polar coordinate information to the control host 2 . The control host 2 calculate...

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Abstract

The invention discloses a laser radar based floating touch system. The system comprises at least two laser radar detection apparatuses, a control host and a display screen, wherein the at least two laser radar detection apparatuses are connected with the control host; the at least two laser radar detection apparatuses are positioned in a watching distance; the laser radar detection apparatuses form a radial laser scanning surface and detect a touch action on the scanning surface to position polar coordinate information of one or more touch points; and the control host calculates spatial positions of the touch points according to the polar coordinate information of the touch points and spatial position information of the corresponding laser radar detection apparatuses. According to the system, the interactive experience of users can be improved, and the detection quantity can be effectively increased through coordination and combination of the at least two laser radar detection apparatuses.

Description

technical field [0001] The invention relates to human-computer interaction technology, in particular to a lidar-based suspension touch human-computer interaction technology. Background technique [0002] Traditional touch screen technologies are resistive screen, capacitive screen, and surface acoustic wave screen. Generally, it can meet the size as large as the size of the TV screen. The screens in exhibition halls and other occasions, such as plasma screens, LCD splicing screens, and projection fusion screens, often have a length of 6 meters and a height of 3 meters. Traditional touch screen technology cannot be applied to such a huge screen occasion. [0003] Large-size touch screens mainly use infrared technology to locate and track the human body, including infrared touch frame technology, infrared camera technology, etc. Since light and natural light both contain infrared light, there is a problem with these technologies that they are very susceptible to interferenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041G06F3/042
Inventor 李江王卫红
Owner ZHEJIANG UNIV OF TECH
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