CN201374037Y

CN201374037Y - Interactive electric white board system based on coded identification

Info

Publication number: CN201374037Y
Application number: CN200920010421U
Authority: CN
Inventors: 张俊星
Original assignee: Dalian Nationalities University
Current assignee: Dalian Minzu University
Priority date: 2009-01-23
Filing date: 2009-01-23
Publication date: 2009-12-30
Anticipated expiration: 2019-01-23

Abstract

The utility model discloses an interactive electric white board system based on coded identification, which comprises a computer, an electric white board, a writing pen, as well as a wireless receiving circuit and an overhead projector connected with the computer, wherein the white board contains the coding information, the writing pen is provided with an image collecting circuit, an image processing circuit, a button and a wireless transmitting circuit corresponding with the wireless receiving circuit within, and the image collecting circuit, the button, and the wireless transmitting circuit are all connected with the image processing circuit. By adopting the invisible codes printed and arranged on the electric white board and collecting and identifying the encode image, the location is completed. The utility model has the advantages of simple structure and low cost, which is convenient for generalization, at the same time, the adoption of the invisible codes results in reduced product failure rate, thereby improving the reliability of the whole system.

Description

Interactive electric whiteboard system based on code identification

Technical field:

The utility model relates to a kind of interactive electric whiteboard system, especially a kind of simple in structure, with low cost, interactive electric whiteboard system based on code identification of being convenient to promote.

Background technology:

Interactive electric whiteboard system is made up of computing machine, projector, lettering pen and electronic whiteboard with positioning function, can increase and decrease project content as required at any time, the strong point that had both had blackboard and multimedia overhead projector, solved the problem of multimedia teaching interactivity difference again, used in occasions such as teaching, meetings.Existing electronic whiteboard with positioning function mainly comprises: electromagnetism, ultrasonic, method such as infrared, as the infrared exoelectron blank is densely covered many to infrared receiver tube and power valve all around in the viewing area, form a plane of scanning motion grid, when the object that can stop infrared light (lettering pen) has stopped that certain is to level during with vertical infrared scan line, just can determine the position (X of lettering pen according to this, the Y coordinate), by the wireless launcher that is arranged on the lettering pen position signalling of lettering pen is launched, receive by the radio receiver that joins with computing machine, by the computer control projector, be projected in the residing position of lettering pen nib, realize mutual.Existing major defect is the system architecture complexity, costs an arm and a leg, thereby has influenced popularizing and promoting of product; Complicated simultaneously structure also causes product reliability low, in case certain infrared receiver tube or power valve damage, all will directly influence the normal use of interactive electric whiteboard system.

Summary of the invention:

The utility model is in order to solve the above-mentioned technical matters of existing in prior technology, and a kind of simple in structure, with low cost, interactive electric whiteboard system based on code identification of being convenient to promote is provided.

Technical solution of the present utility model is: a kind of interactive electric whiteboard system based on code identification, computing machine, electronic whiteboard, lettering pen are arranged, be connected to wireless receiving circuit and projector with computing machine, it is characterized in that: described electronic whiteboard is the blank that contains coded message, in lettering pen, be provided with image acquisition circuit, image processing circuit, button and with the corresponding radio transmitter of wireless receiving circuit, image acquisition circuit, button, radio transmitter all join with image processing circuit.

The utility model is to utilize the hidden code be printed on the electronic whiteboard and the location is finished in the collection and the identification of coded image, simple in structure, with low cost, be convenient to promote, the hidden code that is adopted has simultaneously also reduced the failure rate of product, has improved the reliability of total system.

Description of drawings:

Fig. 1 is the schematic block circuit diagram of the utility model embodiment.

Embodiment:

Below in conjunction with description of drawings embodiment of the present utility model.As shown in Figure 1: the same with prior art, computing machine, electronic whiteboard, lettering pen are arranged, be connected to wireless receiving circuit and projector with computing machine, different is that described electronic whiteboard is the blank that contains coded message with prior art.The blank that contains coded message is that blank is provided with the bidimensional coding that can determine X and Y direction coordinate, can realize by the difference of features such as code-bar width or gray-scale value.Coding manufacturing process is that the ins and outs layer that will comprise position encoded information adopts the printing ink that contains charcoal to print, and other each edition is adopted normal carbon-free ink printing, the infrared signal feature of ins and outs layer is obvious like this, collection by infrared image can be determined corresponding coding information with analysis, not only has the characteristic of maintaining secrecy with low vision interference, more can be hidden under the versicolor pattern of printed matter, realize the stealth of coding.In lettering pen, be provided with image acquisition circuit, image processing circuit, button and with the corresponding radio transmitter of wireless receiving circuit, image acquisition circuit, button, radio transmitter all join with image processing circuit.Image acquisition circuit comprises infrared light supply, optical filter, cmos image sensor etc.; Image processing circuit adopts DSP or other high-speed CPU to realize, adopts certain image processing algorithm (steps such as image pre-service, gray processing, rim detection, location recognition) that coded message is analyzed, thereby determines the position at a place.Radio transmitter can be arranged on the rear end of lettering pen, and the residing position of nib (coordinate) signal is transferred to computing machine; Because lettering pen need have and writes and the mouse dual-use function, so lettering pen can be the same with prior art, comprise page turning (on turn over, turn over down two buttons) and write and click state converting key.

Principle of work:

1. in the time of need writing (alternately), by button lettering pen is adjusted to the state of writing, at this moment, the infrared light that infrared light supply in the lettering pen sends is radiated on the blank that contains coded message, the ins and outs layer that contains position encoded information then reflects infrared light and after filtration mating plate receive by cmos image sensor, cmos image sensor is delivered to image processing circuit (CPU) with the picture signal that is collected, image processing circuit then carries out the image pre-service to resulting signal, gray processing, rim detection, steps such as location recognition, can determine the particular location (coordinate of X and Y direction) of lettering pen nib, and this coordinate signal emitted by wireless launcher, receive by wireless receiving circuit, receive by the wireless receiving circuit that joins with computing machine, by the computer control projector, be projected in the residing position of lettering pen nib, realize mutual.

2. when not needing to write, by button lettering pen is adjusted to the click state, lettering pen then has mouse function, can realize page turning etc.

Claims

1. interactive electric whiteboard system based on code identification, computing machine, electronic whiteboard, lettering pen are arranged, be connected to wireless receiving circuit and projector with computing machine, it is characterized in that: described electronic whiteboard is the blank that contains coded message, in lettering pen, be provided with image acquisition circuit, image processing circuit, button and with the corresponding radio transmitter of wireless receiving circuit, image acquisition circuit, button, radio transmitter all join with image processing circuit.