Three-dimensional interactive electronic whiteboard system and method

Abstract

The invention relates to a three-dimensional interactive electronic whiteboard system and a method which are suitable for the application fields such as man-machine interaction, informationized education, three-dimensional image and video interactive control and the like. The three-dimensional interactive electronic whiteboard system is based on a three-dimensional ultrasonic wireless positioning technology, and utilizes a frequency division multiplexing technology and a trapped wave technology to realize real-time multi-target separation and identification. According to the amplitudes of ultrasonic receipt signals, four receivers which have higher amplitudes and are not arranged on the same straight line are automatically selected as positioning receivers, and an ultrasonic signal with higher signal to noise ratio is utilized for target location. Based on an ultrasonic wave time difference of arrival (TDOA) method, a main controller can complete the three-dimensional positioning for a moving target and transmit the locating information of the moving target into three-dimensional interactive control software; the three-dimensional interactive control software can complete multi-target three-dimensional tracking, displaying and interaction control.

Description

technical field [0001] The present invention relates to a three-dimensional interactive electronic whiteboard system and method, in particular to a three-dimensional interactive electronic whiteboard and method based on ultrasonic wireless positioning technology, which can realize three-dimensional real-time positioning and tracking of multiple targets, and can be used for human-computer interaction and education informatization , 3D image and video interactive control and other fields. Background technique [0002] With the promotion of education informatization and the emergence of teaching resource libraries such as 3D video and images, the support of 3D manipulation technology is urgently needed. Aiming at the defect that the traditional interactive electronic whiteboard cannot support three-dimensional media manipulation, the present invention discloses a three-dimensional interactive electronic whiteboard, and provides a new basic system for educational informatization...

AI Technical Summary

Problems solved by technology

The positioning range of the three-dimensional electromagnetic positioning technology is small, and it is difficult to realize the large-scale multi-target control function

[0004] The Chinese patent "An Ultrasonic Positioning Device and Its Positioning Method" (Application No. 200710026504.0) discloses an ultrasonic positioning device and method, using more than 4 ultrasonic receiving modules to realize the three-dimensional positioning of the transmitting pen and support the non-contact touch function , but does not consider the influence of the receiving angle of the ultrasonic receiver, and does not support multi-target positioning

[0005] In order to solve the defect that the traditional electronic whiteboard cannot support multi-target three-dimensional positioning and non-contact control, based on ultrasonic wireless positioning technology, a three-dimensional interactive electronic whiteboard system and method with three-dimensional multi-target control function are disclosed

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