CN1455527A

CN1455527A - Apparatus of wireless controlling multimedia courseware

Info

Publication number: CN1455527A
Application number: CN03140513A
Authority: CN
Inventors: 程天宇
Original assignee: 程天宇
Current assignee: Beijing Chentuo Lianxin Tech. Development Co., Ltd.
Priority date: 2003-05-27
Filing date: 2003-05-27
Publication date: 2003-11-12
Anticipated expiration: 2023-05-27
Also published as: CN1219364C

Abstract

The device comprises a laser pen with built-in laser generating and emitting module and radio coding and emitting module, a radio signal receiving and processing circuit used to receive radio signal of the laser pen and a computer in which stored with program of signal processing and multimedia control. The forward/back ward or continuous forward/backward for multimedia courseware can be realized by the device at any where in the classroom as it also can be used as normal laser pen.

Description

A kind of device of controlled in wireless multimedia courseware

Technical field:

The invention belongs to electronic applications, particularly device by browsing before and after the multimedia courseware in the radio signal control computer.Multimedia courseware among the present invention mainly refers to Microsoft PowerPoint and Microsoft Word and Adobe PDF document.

Background technology:

Existing multimedia courseware control mode mainly contains keyboard, mouse and three kinds of control modes of wireless mouse.

So-called Keyboard Control mode is come the front and back of the multimedia courseware in the controlling computer to browse by keyboard before promptly the user must stand in computer when using multimedia courseware and is stirred.Multimedia courseware is widely used in classroom instruction, meeting, occasions such as lecture.The weak point of keyboard mode is, the user browses and retreats and browse in order to control advancing of courseware easily in the courseware presentation process, must stand in the computer front, perhaps controls courseware at every turn and all must go to the computer front.This has brought a lot of troubles for the user in the occasions such as teaching and speech, has limited multimedia courseware user's scope of activities, inconveniently exchanges with student or spectators, also is inconvenient to explain and utilizes blackboard writing on the blackboard etc.

So-called mouse control mode is browsed and is stirred by knocking the front and back of clicking the mouse the multimedia courseware in the controlling computer before promptly the user must stand in computer when using multimedia courseware.There is same inconvenience with the Keyboard Control mode.

The wireless mouse mode is to stir with the front and back of wireless mouse control multimedia courseware to browse.Wireless mouse uses radio frequency or infrared mode mostly in order accurately to locate, and effectively control range is generally 2 meters.The weak point of wireless mouse mode is: control range is little, and signal can not across obstacle, and on the high side, volume very much not is convenient for carrying, and can not use simultaneously with common mouse.To give lessons is example, and the scope of activities of teacher in the classroom is generally to be left in 150 meters scopes of computer, and effective control range of wireless mouse does not reach at all; And have some barriers (such as teaching aid, human body etc.) in the middle of unavoidable in the controlled in wireless process, but wireless mouse must could well receive by the cut-through thing; Simultaneously general computer has all been mixed common mouse, and the user is reluctant just to controlling multimedia courseware and buy a wireless mouse separately by near radio; Moreover the wireless mouse volume is bigger, and it is hand held middle convenient to be not so good as laser pen.Therefore the practical value of wireless mouse in the multimedia courseware control of reality is little, uses seldom in the controlled in wireless multimedia courseware.The U.S. fly the shuttle wireless mouse can be in 15 meters scopes effective controlling computer, but across obstacle ability, and costing an arm and a leg also should not be applied.

Summary of the invention:

At the deficiencies in the prior art and defective, the invention provides a kind of device of controlled in wireless multimedia courseware, this device can be in 150 meters scopes the controlled in wireless multimedia courseware, and can across obstacle, can the phase mutual interference between the adjacent user, and with low cost, easy to use, can normally use common wire mouse simultaneously.

The objective of the invention is to be achieved through the following technical solutions: a kind of device of controlled in wireless multimedia courseware, it is characterized in that: this device comprises the laser pen of a built-in laser generation and transmitter module and radio coding and transmitter module, be used to receive the radio signal reception and the treatment circuit of the laser pen signal of telecommunication, and the inner computer that has signal processing and multimedia control program; Described radio signal receives with treatment circuit and comprises that radio signal receives and decoder module, receive the signal amplification circuit that links to each other with the decoder module output with radio signal, and the single chip circuit that is solidified with signal handler and the light-emitting diode that link to each other with the output of signal amplification circuit respectively, the level shifting circuit that links to each other with the single chip circuit output; Described computer links to each other with level shifting circuit by serial line interface.

The present invention has the following advantages and beneficial effect: the device of controlled in wireless multimedia courseware provided by the invention, can use easily in (150 meters) in a big way, and volume is little, and cost is low; And can across obstacle, because radio signal has been passed through Code And Decode, can the phase mutual interference between the adjacent user.Can allow the user in the classroom, can realize front/rear page turning (advance with retreat) and continuous page turning Anywhere, possess the function of common laser pen simultaneously multimedia courseware.

Description of drawings

Fig. 1 uses schematic diagram for apparatus of the present invention.

Fig. 2 is a laser pen part-structure schematic diagram of the present invention.

Fig. 3 receives and the processing section schematic diagram for wireless signal of the present invention.

Fig. 4 is that the wireless signal of the embodiment of the invention receives and the processing section circuit theory diagrams.

Fig. 5 receives and processing section single-chip microcomputer internal processes flow chart for wireless signal of the present invention.

Fig. 6 is the built-in computer software program flow chart.

Embodiment:

Be described further below in conjunction with the principle and the structure of accompanying drawing the controlled in wireless multimedia courseware device of the present invention's proposition.

Fig. 1 is the general structure schematic diagram of this device, comprise the laser pen 1 that has laser generation and transmitter module and radio coding and transmitter module, be used to receive the radio signal reception and treatment circuit 3 of the laser pen signal of telecommunication, and the inner computer 4 that has signal processing and multimedia control program.The user can hand this laser pen, moving freely in 150 meters scope with radio reception and processing unit, in case laser pen 1 will be loaded with the radio wave 2 of control signal and send, radio reception and processing unit 3 can be handled this signal collection and send the computer 4 that inside is equipped with signal processing and multimedia courseware control program to by the RS-232 serial communication port, and the multimedia courseware in this computer-chronograph just advances under the control of program or retreats; Thereby realized controlled in wireless to multimedia courseware.

Operation principle of the present invention is: the user passes through by pen advancing or back on one's body, will advance or backing signal sends by radio coding and transmitter module; In 150 meters scopes, radio reception and treatment circuit can receive signal.The operation principle of radio reception and treatment circuit as shown in Figure 3, radio reception and decoder module receive signal and decode, then decoded signal is passed to signal amplification circuit, signal amplification circuit is passed to single chip circuit and light-emitting diode after signal is amplified; Single chip circuit sends this signal to level shifting circuit after treatment, and level shifting circuit links to each other with computer 9 pin serial line interfaces, sends computer to by the RS-232 Serial Port Line at last; If at this moment signal processing and the multimedia control program in the computer is in normal operating condition, just can correctly receives the instruction that serial ports transmits, and finish control multimedia courseware.Like this, the controlled in wireless process to multimedia courseware has just realized.

Described laser pen structure as shown in Figure 2, this laser pen comprises laser generation and transmitter module and radio coding and transmitter module two parts, pen has 3 button A, B, C on one's body; Multimedia courseware takes a step forward when pressing the button A, launches laser but non-transmitting radio control signal (multimedia courseware does not produce action) when pressing the button B, and multimedia courseware takes a step back when pressing the button C.When pressing the button A or C, the radio signal behind the coding that this laser pen sends can be received smoothly by radio reception and the treatment circuit in 150 meters scopes.

Described signal receive with the treatment circuit annexation as shown in Figure 4, this circuit can be divided into four parts: radio signal receives and decoder module, signal amplification circuit, single-chip microcomputer treatment circuit, level shifting circuit.Wherein the radio signal reception is a first with decoder module, and the amplification chip of signal amplification circuit is LM393, and the single-chip microcomputer of single-chip microcomputer treatment circuit is selected MC68HC908SR12C for use, and the level transferring chip of level shifting circuit is MAX232.Annexation between them is: radio signal receives and 1 pin of decoder module connects+and 5 volts, 3 pin ground connection, 6 pin meet 2 pin and the Light-Emitting Diode SIGNAL1 of LM393 chip in the signal amplification circuit, and 7 pin meet 6 pin and the light-emitting diode SIGNAL2 of LM393 chip in the signal amplification circuit; 1 and 7 pin of LM393 connect 35 and 38 pin of single-chip microcomputer MC68HC908SR12C respectively; 19,20 pin of single-chip microcomputer link to each other with 12 pin with the MAX232 chip 11 of level shifting circuit respectively again; 7 of MAX232 chip links to each other with 2 pin with 3 of 9 pin serial line interfaces with 8 pin again.

Single-chip microcomputer internal program flow process such as Fig. 5, single-chip microcomputer be the auto-initiation system clock after startup, the serial communication setting, and begin to inquire about whether the signal arrival is arranged, also the signal after the processing is sent to level shifting circuit if arrive then signal is carried out respective handling.If user's single-chip microcomputer that resets in this process, then single-chip microcomputer carries out initialization again and restarts executive program then.Signal after single-chip microcomputer is handled passes through that level shifting circuit (adopting the MAX232 chip in this example) is converted to again can be directly and the level of computer serial communication, deliver to computer RS-232 serial communication interface at last, thereby finished the reception and the processing of signal.The control to multimedia courseware is handled and finished to the signal that signal handler in the computer transmits serial ports.

The flow process of built-in computer signal handler as shown in Figure 6, the user opens serial port 2 automatically (owing to generally serial port 1 is connected projecting apparatus after moving this program, all radio signals receive with treatment circuit and generally are connected on the serial port 2 of computer, so Automatic Program is selected serial port 2), if serial port 2 just in use, then provide prompting; If do not use then can successfully open; Program enters main interface.This program can correctly receive signal that radio reception and treatment circuit send over and finished control to multimedia courseware simultaneously this moment.Different serial communication ports can be selected to use at program master interface, corresponding serial port can be opened or close.If the radio signal reception is connected with serial port 2 other serial ports in addition with treatment circuit, should in main interface, select [option] menu bar to change; If the user changes selected string slogan, then Automatic Program is closed and is currently taken serial ports then open the string slogan of user's appointment; The user can also check the version information explanation, perhaps selects to quit a program.

Claims

1. the device of a controlled in wireless multimedia courseware, it is characterized in that: this device comprises the laser pen of a built-in laser generation and transmitter module and radio coding and transmitter module, be used to receive the radio signal reception and the treatment circuit of the laser pen signal of telecommunication, and the inner computer that has signal processing and multimedia control program; Described radio signal receives with treatment circuit and comprises that radio signal receives and decoder module, receive the signal amplification circuit that links to each other with the decoder module output with radio signal, and the single chip circuit that is solidified with signal handler and the light-emitting diode that link to each other with the output of signal amplification circuit respectively, the level shifting circuit that links to each other with the single chip circuit output; Described computer links to each other with level shifting circuit by serial line interface.

2. according to the device of the described a kind of controlled in wireless multimedia courseware of claim 1, it is characterized in that: described radio coding and transmitter module model are the YCF200 transmitter module, radio reception and decoder module model are the YCF200 receiver module, adopt LM393 to amplify chip in the signal amplification circuit, single-chip microcomputer adopts the MC68HCSR12C chip, and level shifting circuit adopts the MAX232 chip.