Interactive electronic whiteboard based on DSP (Digital Signal Processor)

Abstract

The invention discloses an interactive electronic whiteboard based on a DSP (Digital Signal Processor). The interactive electronic whiteboard comprises a whiteboard body, a computer and a projector, wherein the computer and the projector are connected with the whiteboard body in sequence; the whiteboard body comprises a receiving coil matrix net, an echo scanning circuit, a filter circuit, an A / D conversion circuit, the DSP and an electromagnetic pen, wherein the echo scanning circuit, the filter circuit, the A / D conversion circuit and the DSP and the electromagnetic pen are electrically connected with the receiving coil matrix net in sequence; the electromagnetic pen is used for writing on the whiteboard body and can generate electromagnetic wave; the receiving coil matrix net is embedded in the whiteboard body and has the same size with the writing area of the whiteboard body; and the DSP and the computer are connected through an RS232 serial port bus; the projector and the computer are connected through a network cable or a video bus for projecting to the whiteboard body, and therefore, the writing area, the computer and the projection mechanism form a photoelectric integration interactive system. The positioning accuracy of the interactive electronic whiteboard is 0.1mm, a resolution ratio is 256DPI (Dots Per Inch), tracking speed is 7000mm / s, and the interactive electronic whiteboard has the advantages of being convenient in operation and low in cost.

Description

technical field [0001] The invention relates to the technical field of educational aids, in particular to an interactive electronic whiteboard based on a DSP digital processor. Background technique [0002] As a new teaching and business tool, the electronic whiteboard can be used not only as an ordinary whiteboard, but also as a touch electronic screen. Connect the electronic whiteboard to a PC, and use a projector to project the content on the PC to the electronic whiteboard screen. The electronic whiteboard is equivalent to a handwriting board with a particularly large area. You can write and draw on it arbitrarily and display it on the PC in real time. The files are saved as graphic files. It is easy to use and powerful, and has been widely used. [0003] However, the electronic whiteboards based on electromagnetic induction on the market are generally based on the processing system of the single-chip microcomputer, not only the response speed is not fast enough, the po...

AI Technical Summary

Problems solved by technology

[0003] However, the electronic whiteboards based on electromagnetic induction on the market are generally based on the processing system of the single-chip microcomputer, not only the response speed is not fast enough, the positioning accuracy is not high, and it cannot meet the somatosensory needs of writing.

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