CN1725257A - Radio control device and method for multimedium teaching - Google Patents
Radio control device and method for multimedium teaching Download PDFInfo
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- CN1725257A CN1725257A CNA2005100343712A CN200510034371A CN1725257A CN 1725257 A CN1725257 A CN 1725257A CN A2005100343712 A CNA2005100343712 A CN A2005100343712A CN 200510034371 A CN200510034371 A CN 200510034371A CN 1725257 A CN1725257 A CN 1725257A
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Abstract
A multimedia teaching wireless control device and a method includes a terminal device having the function of teaching instruction and a wireless mouse and sending remote information with the identifications of the terminal device to a receive controller to operate the multimedia devices and a receive controller receiving the remote control and operates multimedia devices.
Description
Technical field
The present invention relates to a kind of control device of wireless and method, particularly relate to a kind of multimedia teaching with control device of wireless and method.
Background technology
Existing laser pointer is generally just merely indicated teaching process by laser diode emission beam of laser, more complicated laser pointer has the function of straighforward operation computing machine page turning, as Chinese patent 03270412 " laser pen of page-turning button and wireless transmitter about having ", Chinese patent 03233821 " the multifunction wireless control device of multimedia presentation system ", Chinese patent 02257924 " multimedia presentation wireless remote controller " etc., these laser pointer provide certain help for teaching demonstration.In addition, along with Development of Multimedia Technology, projector or large screen display have replaced blackboard gradually; And multimedia presentation equipment such as computing machine, show stand, DVD become the main tool of modernizing teaching.General multi-media classroom mainly is various audio-visual equipment to be concentrated on the dais stack together, and equipment is numerous, brand is different, and various telepilots are a lot of, and power lead, signal wire are a glob of, and operation of equipment is used very complicated.Certainly also have simply to have the use that the multimedia controller of looking the audio frequency switching can be simplified multi-media classroom, but also need be in control panel or the enterprising line operate control of computer software.Chinese patent 98207406 " (the multimedia teaching controller " a kind of device of multimedia equipment being controlled by computer software of description, but can only finish and simply look audio frequency switching and device power supply (DPS) management, and can not solve the man-machine problem that realizes that freely it is interactive in the multimedia teaching fully, and control suitable complexity and be subjected to the limitation of many conditions.Simultaneously present open classroom also proposes new management expectancy to the safety of multimedia equipment, and existing equipment use and management only realizes by the mode of locking.
Summary of the invention
The object of the present invention is to provide a kind of not only can overcome existing laser pointer only have the problem of single teaching deixis but also can overcome problems such as control operation complexity, the difficulty of multimedia teaching facility is big multiple functional, man-machine interface is friendly, convenient and practical, compatible strong multimedia teaching is with control device of wireless and method alternately.
The objective of the invention is to be achieved through the following technical solutions:
Multimedia teaching control device of wireless of the present invention is characterized in comprising:
One has teaching indication and wireless mouse function and can send and have the remote information of terminal device identification marking and each multimedia equipment is carried out the terminal device that intelligent wireless is controlled to receiving controller;
One is used for the remote information of receiving terminal apparatus and the reception controller that each multimedia equipment is carried out corresponding control operation;
Wherein, above-mentioned terminal device includes microprocessor (CPU1) and is connected in regular turn with this microprocessor (CPU1) respectively:
Comprise the remote keypad of forming by a plurality of switch keys, mousebutton, signal switching key, volume control key, multimedia equipment teleswitch;
Be used for storing device information, by key definition, the flash memory (X1) of parameter and director data is set;
Information after by FSK modulating part, PLL composite part, high-frequency emission being used for of partly forming microprocessor (CPU1) being handled is carried out the wireless launcher of modulate emission;
By being used for that power conversion part, rectifying and wave-filtering part and voltage stabilizing are partly formed to microprocessor (CPU1), the electric power management circuit of flash memory (X1) power supply and the laser indicating member that is connected with this electric power management circuit;
Wherein, microprocessor (CPU1) adopts C8051F221, AT89LS52, P89LX51 or other low-voltage single-chip microcomputer, this microprocessor (CPU1) receives and judges the information of remote keypad and be converted into the reception controller identifiable information of tape terminal device identification, again this information is delivered to wireless launcher by its I/O mouth and carries out modulate emission.
Above-mentioned reception controller includes microprocessor (CPU2) and is connected in regular turn with microprocessor (CPU2) respectively:
Be used to store customer parameter, parameter be set, the flash memory (X2) of serial ports sign indicating number and infrared code data;
Be used to provide the electric power management circuit of various voltages;
The wireless receiving circuit of forming by high frequency receiving unit, PLL composite part, FSK demodulation part that is used for the control information of receiving terminal apparatus;
But the infrared learning and the infrared control circuit that are used to learn the infrared coding of telepilot of each multimedia equipment and these telepilots of emulation and can carry out remote control control to multimedia equipment;
Be used for serial ports control circuit that projector and computer are controlled;
Be used for the ON-OFF control circuit that the power supply to each multimedia equipment manages;
Be used for the video/audio signal of a plurality of multimedia equipments is switched to the frequency switch circuit of looking of projector and power amplifier;
Be used for the VGA signal of a plurality of computers is switched to the VGA commutation circuit of projector;
Be used for the volume control circuit that microphone volume and master volume are controlled;
Wherein, microprocessor (CPU2) adopts C8051F022, AT89S52, P89LX51 or other single-chip microcomputer, the control information of described wireless receiving circuit receiving terminal apparatus and it is sent into microprocessor (CPU2) and handles after again by microprocessor (CPU2) according to the classification of control information with it by corresponding infrared control circuit or serial ports control circuit or ON-OFF control circuit or look frequency switch circuit or VGA commutation circuit or volume control circuit are realized the control of corresponding multimedia equipment.
Wherein, for further solving above-mentioned terminal device owing to too much number of keys makes the problem of its complicated operation, above-mentioned terminal device also includes one and is used to show and the display screen and the display panel control circuit that are connected with microprocessor (CPU1) of controlling various control commands.Thereby can be easily show that by display screen various control commands reduce the quantity of control button, guarantee the convenience, simple and improve the reliability that it is controlled of its operation.On this basis, for showing the various feedback informations that receive controller on the display screen that makes terminal device, make of the present invention controlling more intuitively with very clear, further improve reliability, the practicality of its operation, above-mentioned reception controller also includes a wireless launcher of partly being made up of FSK modulating part, FLL composite part, high-frequency emission that is used for feedback informations such as the equipment switching state of microprocessor (CPU2) and volume are carried out modulate emission; And above-mentioned terminal device also includes a wireless receiving circuit of being made up of high frequency receiving unit, PLL composite part, FSK demodulation part that is used to receive feedback informations such as the equipment switching state of controller and volume.
For further reducing the quantity of control button, user-friendly, above-mentioned reception controller also include one be used for judging each multimedia equipment look audio interface and VGA interface have no signal and according to the RST of each multimedia equipment interface with realize multi-media signal detect automatically with being connected to of intelligence switching look between frequency switch circuit and the microprocessor (CPU2) look audio detection circuit and be connected in the VGA commutation circuit and microprocessor (CPU2) between the VGA testing circuit.
For convenient described multimedia teaching is carried out network remote control and telemanagement with control device of wireless, above-mentioned reception controller also includes one and is used to realize that network remote is controlled and the network transmission circuit that is connected in microprocessor (CPU2) of telemanagement, and it is connected with campus network by the Ethernet interface of standard.
Be further to strengthen the functions of use of multimedia teaching with control device of wireless, above-mentioned terminal device also includes a digital speech radio transmitter of being made up of microphone and mould/number conversion circuit that is used for wireless public address; Above-mentioned reception controller also includes a digital speech wireless receiving circuit of being made up of D/A switch circuit and audio amplifier circuit.
A kind of multimedia teaching wireless control method of the present invention is characterized in may further comprise the steps:
(1) microprocessor of terminal device (CPU1) receives and this input information to be carried out function behind the input information of remote keypad and judge, and is the discernible control information of reception controller of tape terminal device identification with its conversion process;
(2) microprocessor (CPU1) is delivered to wireless launcher with the control information after the conversion process by its I/O mouth and is carried out modulate emission;
(3) wireless receiving circuit that receives controller receives and is transported to microprocessor (CPU2) after the control information of terminal device and carries out identification information judgment;
(4) microprocessor (CPU2) to identification information judgment effectively after, instruction is carried out analysis and judgement and classification is handled, and realizes corresponding multimedia control.
Wherein, the wireless receiving circuit that receives controller in the above-mentioned steps (3) receives and is transported to microprocessor (CPU2) after the control information of terminal device and carries out identification information judgment, may further comprise the steps:
(31) when the push button, terminal device sends the packet of band unique identification information;
(32) receiving controller has a label table, stores the identification information that all allow the terminal device of operation; After the reception controller is received packet, search identification information and whether in label table, exist, then carry out the control corresponding operation and return success information if exist; Do not send solicited message by the network transmission circuit to webmastering software if do not exist then;
(33) after webmastering software is received solicited message, then return agreement information, disagree with and then return refusal information if agree this terminal use;
(34) after the reception controller is received the agreement information of webmastering software, in label table, increase the identification information of this terminal, carry out the control corresponding operation and return success information by wireless receiving and dispatching;
(35) receive that controller is received the refusal information of webmastering software or the information of not receiving then sends refusal information by wireless receiving and dispatching;
(36) terminal device is received refusal information, and display screen shows haves no right operation indicating.
In the above-mentioned steps (4) microprocessor (CPU2) to identification information judgment effectively after, instruction is carried out that analysis and judgement and classification are handled and the control that realizes corresponding multimedia equipment may further comprise the steps:
(41) if microprocessor (CPU2) judgement information is for receiving the controller opens instruction then to looking power supplies such as frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit; If microprocessor (CPU2) is judged as the out code of message pick-up controller and then cuts out power supplys such as looking frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit;
(42) microprocessor (CPU2) judgement information is that projector's serial ports steering order then sends projector to the serial ports sign indicating number by the serial ports level shifting circuit, realizes the controls such as open and close to projector;
(43) microprocessor (CPU2) judgement information is that the infrared sign indicating number steering order of projector, DVD etc. is then sent the corresponding infrared sign indicating number of infrared learning storage by the infrared emission circuit, realizes the infrared remote control to projector, DVD etc.;
(44) microprocessor (CPU2) thus judgement information is the power devices instruction of projector or computer etc. send the high level attracting electric relay to give power devices then for the driving circuit of corresponding relay;
(45) microprocessor (CPU2) judgement information then sends to computer software to information by the serial ports level shifting circuit for the instruction of computer mouse Simulation Control, and computer software carries out the mouse function that analyzing and processing realizes computer to instruction;
(46) microprocessor (CPU2) judgement information is that control level realizes volume to electronic potentiometer size adjustment is then sent out in the volume regulating command;
(47) microprocessor (CPU2) judgement information is that the equipment switching command then carries out corresponding video switch, audio frequency switching or VGA switching according to device type;
At this moment, microprocessor (CPU2) judgement information is that the equipment switching command then carries out corresponding video switch, audio frequency switching or VGA switching processing according to device type in the above-mentioned steps (47), may further comprise the steps:
(471) read in user-defined equipment after the start of reception controller and switch the right of priority table;
(472) receive controller and regularly search the equipment that vision signal is arranged, search the equipment that the VGA signal is arranged by the VGA testing circuit by the Video Detection circuit;
(473) receive controller if detect certain video or the appearance of VGA signal, activate this equipment in the right of priority table; And it is current device that the priority level of this equipment is provided with this equipment on current device the time automatically;
(474) receive controller if detect certain video or VGA blackout, hide this equipment in the right of priority table; If this equipment is current device, then other the highest equipment of priority are changed into current device;
(475) when pressing switch key, terminal device sends handover information;
(476) receive controller and receive that handover information and identification information authentication are passed through after, change the equipment of next priority level or highest level into current device;
(477) be set as the video input state if the current device vision signal of selecting is then switched this signal to projector and with projector, be set as the VGA input state to projector and with projector if the VGA signal then switches this signal; If this equipment has audio frequency then simultaneously sound signal to be switched to power amplifier;
(478) receive the device numbering information that controller is sent completely switching, the expression handover success;
(479) terminal device is received the device numbering information of switching, shows this equipment at display screen.
The present invention is owing to adopt the terminal device of the tool laser indication with radio communication function and reception controller to organically combine the wireless control method of realizing multimedia teaching, both utilized the laser deixis of terminal device to realize common laser indication, come simple and reliable by terminal device and the radio communication that receives the remote information that has the terminal device identification marking that sends between the controller again and realize switch all sidedly each multimedia equipment, the plus-minus of volume, omnibearing straighforward operations such as the selection of equipment and signal and switching, both guaranteed that the user can free for a full due from the complexity of each multimedia equipment is controlled, guarantee that effectively the user can be absorbed in teaching and explanation thereof fully, guaranteed that again the user can realize the intelligent wireless control to each multimedia equipment easily, and its control is simple and reliable, multiple functional, man-machine interface close friend, convenient and practical alternately, compatible strong.Be arranged at terminal device simultaneously respectively and receive display screen, digital voice device, feedback signal, wireless transmitter in the controller, look audio detection and VGA pick-up unit, device such as network transmission circuit, can further expand function of the present invention, make the present invention show various control commands by display screen easily and effectively reduce the quantity of control button, guarantee the convenience, simple and improve the reliability that it is controlled of its operation.And make and of the present inventionly control more directly perceived and come into plain view, further improve reliability, the practicality of its operation, and can utilize this multimedia teaching to carry out network remote control and telemanagement easily with control device of wireless, utilization simultaneously has the terminal device of unique identification information and the information processing between the reception controller, can realize remote monitoring and management easily, guarantee safe handling and the management of each multimedia equipment in open teaching multimedia teaching facility.
Describe basic structure of the present invention and implementation method in detail below in conjunction with accompanying drawing:
Description of drawings
Fig. 1 is that structure of the present invention is formed synoptic diagram;
Fig. 2 is the structural representation of the contour structures embodiment 1 of terminal device of the present invention;
Fig. 3 is the structural representation of the contour structures embodiment 2 of terminal device of the present invention;
Fig. 4 is the square frame composition diagram of the video processing circuits of reception controller of the present invention;
Fig. 5 is the square frame composition diagram of the audio frequency processing circuit of reception controller of the present invention;
Fig. 6 is the square frame composition diagram of VGA treatment circuit of the present invention;
Fig. 7 is the square frame composition diagram of network connecting circuit of the present invention;
Fig. 8 is the process flow diagram of implementation method of the present invention;
Fig. 9 is the process flow diagram of terminal device rights of using management of the present invention;
Figure 10 is the process flow diagram that each multimedia equipment of the present invention automaticallyes switch.
Embodiment
As Fig. 1～shown in Figure 7, a kind of multimedia teaching of the present invention comprises with control device of wireless:
One has teaching indication and wireless mouse function and can carry out the terminal device that intelligent wireless is controlled to each multimedia equipment;
One is used for the remote information of receiving terminal apparatus and the reception controller that each multimedia equipment is carried out corresponding control operation;
Wherein, described as shown in Figure 1 terminal device includes microprocessor CPU 1 and is connected in regular turn with this microprocessor CPU 1 respectively:
Comprise the remote keypad of forming by a plurality of switch keys, mousebutton, signal switching key, volume control key, multimedia equipment teleswitch;
Be used for storing device information, by key definition, the flash memory X1 of parameter and director data is set;
Information after by FSK modulating part, PLL composite part, high-frequency emission being used for of partly forming microprocessor CPU 1 being handled is carried out the wireless launcher of modulate emission;
By being used for that power conversion part, rectifying and wave-filtering part and voltage stabilizing are partly formed to microprocessor CPU 1, the electric power management circuit of flash memory X1 power supply and the laser indicating member that is connected with this electric power management circuit;
Wherein, microprocessor CPU 1 adopts C8051F221, AT89LS52, P89LX51 or other low-voltage single-chip microcomputer, in the present embodiment, microprocessor CPU 1 adopts C8051F221, this microprocessor CPU 1 adopts 8051 microcontroller kernels at a high speed, band hardware UART and spi bus and 3 general counter/timers, band A/D change-over circuit can be realized the microphone signal digitizing; Flash memory X1 adopts serial electrically-erasable storer AT24C16, and the storage space of 2K is arranged; The reception controller identifiable information that this microprocessor CPU 1 receives and judges the information of remote keypad and be converted into the tape terminal device identification is delivered to wireless launcher with this information by its I/O mouth again and is carried out modulate emission; This moment, described supervisory keyboard was made up of a plurality of touch-switchs; Power management adopts RT9262A to boost and the voltage stabilizing chip, provides the stable voltage of 3V to microprocessor CPU 1, flash memory X1 and wireless transceiver circuit; Antenna adopts built-in aerial.
Described reception controller includes microprocessor CPU 2 and is connected in regular turn with microprocessor CPU 2 respectively:
Be used to store customer parameter, parameter be set, the flash memory X2 of serial ports sign indicating number and infrared code data; Flash memory X2 adopts serial electrically-erasable storer AT24C256, and the storage space of 32K is arranged, and two I/O interfaces of I2C bus mode and microprocessor CPU 2 link to each other, and is responsible for the storaging mark table, switches right of priority table, customer parameter, serial ports sign indicating number and infrared code data;
Be used to provide the electric power management circuit of various voltages; This electric power management circuit comprises power conversion, rectifying and wave-filtering and mu balanced circuit, and positive and negative 12V, positive and negative 5V and the various voltages of 3V are provided.Close other circuit powers when controller cuts out when receiving, only give basic circuit power supplies such as microprocessor, network transmitting-receiving and wireless receiving and dispatching;
The radio receiver of forming by high frequency receiving unit, PLL composite part, FSK demodulation part that is used for the control information of receiving terminal apparatus;
But the infrared learning and the infrared control circuit that are used to learn the infrared coding of telepilot of each multimedia equipment and these telepilots of emulation and can carry out remote control control to multimedia equipment; Owing to will replace the telepilot of various audio-visual equipment that it is controlled,, could imitate the telepilot of these equipment then equipment remote-control is controlled so will learn the infrared coding of these appliance remote controls earlier.Infrared learning is analyzed with flash memory X2 by microprocessor by infrared receiving diode reception infrared information and is stored.Infrared emission then sends the code of storage by infrared transmitting tube;
Be used for serial ports control circuit that projector and computer are controlled; Be responsible for providing the two independent serial line interface to projector or the control of other serial equipments; Adopt level transferring chip MAX232, the I/O mouth of its end and microprocessor CPU 2 is connected, the serial ports of a termination computing machine and projector.Connect computer by serial the emulation mouse message of terminal is delivered to the built-in software of computer, realize operation computer;
Be used for the ON-OFF control circuit that the power supply to each multimedia equipment manages; This ON-OFF control circuit comprises seven relays and relevant driving circuit, driving circuit adopts the ULN2003 chip, its output terminal is connected with relay, the I/O mouth of input end and microprocessor CPU 2 is connected, and is responsible for the 220V device power supply (DPS) managed and opens, says the control that cabinet door electronic lock is opened with computer;
Be used for the video/audio signal of a plurality of multimedia equipments is switched to the frequency switch circuit of looking of projector and power amplifier.Wherein the frequency switch circuit of looking in the present embodiment is made up of video switch circuit and frequency switch circuit, described video switch circuit was responsible for a DVD player, video recorder, video showing platform and other external vision signals and was switched to projector, monitor and Video Detection circuit by three 4052 as shown in Figure 4 this moment.The input and output of vision signal increase emitter follower, and the driving force of signal and the isolation between the signal are provided.Four video input signals of 4052 input termination, output terminal vision signal output, two control pins connect the I/O mouth of microprocessor CPU 2, realize the switching controls of vision signal by the high-low level of controlling 4052 control pin;
The volume control circuit that described frequency switch circuit and microphone volume and master volume are controlled constitutes audio frequency processing circuit jointly, this moment as shown in Figure 5, this audio frequency processing circuit, responsible DVD player, video recorder, computer and notebook computer sound signal are switched to by 4052 of one side delivered to back level amplification after electronic potentiometer 9313 is regulated volumes.Four audio input signals of 4052 input termination, the potentiometer input end of output terminal audio signal output to 9313, two control pins connect the I/O mouth of microprocessor CPU 2, realize the switching controls of sound signal by the high-low level of controlling 4052 control pin.The I/O mouth of 9313 control termination microprocessor CPU 2 is realized the volume adjusting by the high-low level pulse.In addition on the one hand, amplify by the back level of also delivering to audio frequency processing circuit after the electronic potentiometer 9313 adjusting volumes after wired or wireless microphone amplifies, back grade amplification is delivered to power amplifier to the mixing sound of microphone and sound signal and is promoted audio amplifier.
Be used for the VGA signal of a plurality of computers is switched to the VGA commutation circuit of projector; As shown in Figure 6, this reception controller VGA treatment circuit comprises the distribution of computer VGA signal and the switching of four road VGA signals.The computer rgb signal send switching chip and display respectively after distributing amplification by CLC5654, and computer rgb signal that distributes and notebook rgb signal switch chip by the 330Q alternative delivers to next stage switching 330Q; Other numbers show platform and other rgb signal are also delivered to next stage by the switching chip of 330Q alternative and are switched 330Q; Deliver to the projection delivery outlet by the rgb signal that switch the second level.The row of computer and field signal then distribute amplification to deliver to display respectively by 74F244 and chip is switched in the row field; The row of four road VGA and field signal are delivered to the projection delivery outlet after switching through the two-stage of two row switching chip 74F157.All 330Q and 74F157 two control pins connect the I/O mouth of microprocessor CPU 2, and the high-low level of the control pin by controlling them is realized the switching controls of signal.
Wherein, microprocessor CPU 2 adopts C8051F022, AT89S52, P89LX51 or other single-chip microcomputer, in the present embodiment, microprocessor CPU 2 adopts C8051F022, this microprocessor CPU 2 adopts the C8051F022 of 8051 microcontroller kernels at a high speed, band hardware UART and spi bus and 5 general counter/timers, 64 I/O interfaces need not expand can directly control other circuit, the D/A conversion that band A/D and D/A can achieve a butt joint and receive terminal device microphone digital signal; The control information of described wireless receiving circuit receiving terminal apparatus and it is sent into microprocessor CPU 2 and handles after again by microprocessor CPU 2 according to the classification of control information with it by corresponding infrared control circuit or serial ports control circuit or ON-OFF control circuit or look frequency switch circuit or VGA commutation circuit or volume control circuit are realized the control of corresponding multimedia equipment.
Wherein, as Fig. 2～shown in Figure 3, for further solving above-mentioned terminal device makes its complicated operation owing to too much number of keys problem, as shown in Figure 2, above-mentioned terminal device also includes one and is used to show and the display screen and the display panel control circuit that are connected with microprocessor CPU 1 of controlling various control commands.Thereby can be easily show that by display screen various control commands reduce the quantity of control button, guarantee the convenience, simple and improve the reliability that it is controlled of its operation.At this moment, shell 1, laser diode 2, display screen 3, power switch 4, switch 5, direction operating key 6, acknowledgement key 7, switch key 8, laser switch key 9, antenna 10, microphone 11.As the wireless mouse remote-control computer, direction operating key 6 is the directionkeys of mouse when switch 5 pushes the mouse mode, and acknowledgement key 7 is the left button of mouse, and switch key 8 is the right button of mouse; Control multimedia equipment as remote control panel when switch 5 pushes control mode, the right and left key of direction operating key 6 is a menu key, key is a plus-minus mode operating key up and down, and acknowledgement key 7 is the acknowledgement key of control, and switch key 8 is the switch key of multimedia equipment.But the menu user who shows in the described terminal device is provided with increase and decrease; Have in the Control-Menu that controller leaves, controller closes, the cabinet door is opened, projection switch, computer switch, silence switch, master volume plus-minus, microphone volume plus-minus, screen lifting, television channel is added and subtracted and the DVD selected songs are added and subtracted.Certainly for further making the terminal device display operation easier, as shown in Figure 3, the present invention also can utilize touch-screen to replace remote keypad and display screen, finishes the input of key information by touch-screen.At this moment, described terminal device comprises shell 1, laser diode 2, touch-screen 3, power switch 4, laser switch key 41, antenna 10, microphone 11.Laser diode produces laser after pressing the laser switch key, and touch-screen is opened after pressing power switch key.Button menu on the touch-screen divides computer control and two districts of multimedia control, but the user is provided with increase and decrease.Have in the Control-Menu that controller leaves, controller closes, the cabinet door is opened, projection switch, computer switch, silence switch, master volume plus-minus, microphone volume plus-minus, screen lifting, television channel is added and subtracted and the DVD selected songs are added and subtracted; The mouse contents of menus has the upper and lower, left and right direction, left button, right button, on turn over and under turn over.On this basis, for showing the various feedback informations that receive controller on the display screen that makes terminal device, make of the present invention controlling more intuitively with very clear, further improve reliability, the practicality of its operation, above-mentioned reception controller also includes a wireless launcher of partly being made up of FSK modulating part, FLL composite part, high-frequency emission that is used for feedback informations such as the equipment switching state of microprocessor CPU 2 and volume are carried out modulate emission; And above-mentioned terminal device also includes a wireless receiving circuit of being made up of high frequency receiving unit, PLL composite part, FSK demodulation part that is used to receive feedback informations such as the equipment switching state of controller and volume.In the present embodiment, only need all to change the wireless receiving circuit in radio transmitter in the terminal device and the reception controller into wireless transceiver circuit and both can realize, thereby can carry out two-way wireless communication.By the double-direction radio communication equipment switching state in the reception controller and volume are fed back to the terminal display screen demonstration.Wherein, wireless receiving and dispatching adopts nRF401 high speed monolithic radio transmitting and receiving chip, and this radio transmitting and receiving chip passes Application Design for the short-distance wireless number specially, is operated in the 433MHz ISM band.The design of low emissive power and high receiving sensitivity has been adopted in its design, and integrated high-frequency emission, high frequency receive, functions such as PLL is synthetic, FSK modulation, FSK demodulation, two-way switching, and dual-mode antenna is unified.
The technical measures that increase display screen can reduce a large amount of control buttons, but because the multimedia equipment kind is more, the choice of equipment button that Projection Display and power amplifier switch has DVD, video recorder, show stand, external AV, computer, notebook etc., the same inconvenient user's of switching key that these are numerous and diverse use.For further reducing the quantity of control button, user-friendly, above-mentioned reception controller also include one be used for judging each multimedia equipment look audio interface and VGA interface have no signal and according to the RST of each multimedia equipment interface with realize multi-media signal detect automatically with being connected to of intelligence switching look between frequency switch circuit and the microprocessor CPU 2 look audio detection circuit and be connected in the VGA commutation circuit and microprocessor CPU 2 between the VGA testing circuit.On terminal device, need only a switching key like this and just can realize that the signal of equipment switches.Concrete technical scheme is to increase Video Detection and VGA testing circuit in receiving controller; Video Detection is made up of synchronizing separator circuit and Microprocessor Interface, if microprocessor has detected sync level and represented that then this video interface has signal; VGA detects then by row or field signal input circuit and Microprocessor Interface and forms, the field input signal of four VGA signals and four I/O mouths of microprocessor CPU 2 are connected, and have row or field signal level to represent that then this VGA interface has signal if microprocessor detects certain I/O mouth.
Can go out the choice of equipment projection that signal is arranged automatically by input on the one hand, the demonstration that DVD, video recorder, exhibition booth, outer signal, computer and notebook can be controlled by the switch key of multimedia teacher's pointer in the another one aspect is switched.
In order further to simplify the operation, intelligence is convenient more to make terminal in addition, and reception controller of the present invention also increases projector's switch testing circuit.This circuit comprises sampling resistor, rectifying and wave-filtering and A/D convertor circuit, and its principle is the switch that projector is judged in the variation of the supply current of detection projector.Detect the state that to point out it by projector's switch, realize switch automatic lifting screen in addition, make the operation of screen full intellectualized according to projector.
Though the control button of terminal device has been reduced to have only several by above a plurality of technical measures, under the prerequisite that does not have to reduce in control function, the button of having simplified operation makes multimedia equipment control intelligent more and oversimplify.But because the present invention that separately makes of mouse control button and multimedia control button controls relative some complexity of button.Another further innovative approach of the present invention is to increase the function conversion that switch is finished button.As the wireless mouse remote-control computer, the direction operating key is the directionkeys of mouse when switch pushes the mouse mode, and acknowledgement key is the left button of mouse, and switch key is the right button of mouse; When switch pushes control mode, controlling multimedia equipment as remote control panel, the right and left key of its direction operating key is a menu key at this moment, key is a plus-minus mode operating key up and down, acknowledgement key is the acknowledgement key of control, and switch key is the switch key of multimedia equipment.
Carry out network remote control and telemanagement by described multimedia teaching with control device of wireless for convenient, above-mentioned reception controller also includes one and is used to realize that network remote is controlled and the network transmission circuit that is connected in microprocessor CPU 2 of telemanagement, and it is connected with campus network by the Ethernet interface of standard.As shown in Figure 8, receive the block scheme of an example of controller network connecting circuit.Comprise network chip, internal memory and bus driving circuits, be responsible for communicating by letter, can also realize the network remote of multimedia equipment is controlled and management by it with the webmastering software on the campus network.Network chip employing RTL8019 provides the network bandwidth of 10M, 62256 impact dampers as network data processing of internal memory.
Be further to strengthen the functions of use of multimedia teaching with control device of wireless, above-mentioned terminal device also includes a digital speech radio transmitter of being made up of microphone and mould/number conversion circuit that is used for wireless public address; Above-mentioned reception controller also includes a digital speech wireless receiving circuit of being made up of D/A switch circuit and audio amplifier circuit.
As Fig. 8-shown in Figure 10, multimedia teaching wireless control method of the present invention may further comprise the steps:
(1) microprocessor CPU 1 of terminal device receives and this input information is carried out function behind the input information of remote keypad and judge, and is the discernible control information of reception controller of tape terminal device identification with its conversion process;
(2) microprocessor CPU 1 is delivered to wireless launcher with the control information after the conversion process by its I/O mouth and is carried out modulate emission;
(3) wireless receiving circuit that receives controller receives and is transported to microprocessor CPU 2 after the control information of terminal device and carries out identification information judgment;
(4) 2 pairs of identification information judgment of microprocessor CPU effectively after, instruction is carried out analysis and judgement and classification is handled, and realizes corresponding multimedia control.
Wherein, the wireless receiving circuit that receives controller in the above-mentioned steps (3) receives and is transported to microprocessor CPU 2 after the control information of terminal device and carries out identification information judgment, may further comprise the steps:
(31) when the push button, terminal device sends the packet of band unique identification information;
(32) receiving controller has a label table, stores the identification information that all allow the terminal device of operation; After the reception controller is received packet, search identification information and whether in label table, exist, then carry out the control corresponding operation and return success information if exist; Do not send solicited message by the network transmission circuit to webmastering software if do not exist then;
(33) after webmastering software is received solicited message, then return agreement information, disagree with and then return refusal information if agree this terminal use;
(34) after the reception controller is received the agreement information of webmastering software, in label table, increase the identification information of this terminal, carry out the control corresponding operation and return success information by wireless receiving and dispatching;
(35) receive that controller is received the refusal information of webmastering software or the information of not receiving then sends refusal information by wireless receiving and dispatching;
(36) terminal device is received refusal information, and display screen shows haves no right operation indicating.
After the middle 2 pairs of identification information judgment of microprocessor CPU of above-mentioned steps (4) are effective, analysis and judgement realizes corresponding multimedia equipment with the classification processing control is carried out in instruction, be may further comprise the steps:
(48) if microprocessor CPU 2 judgement information are for receiving the controller opens instruction then to looking power supplies such as frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit; If microprocessor CPU 2 is judged as the out code of message pick-up controller and then closes power supplys such as looking frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit;
(49) microprocessor CPU 2 judgement information are that projector's serial ports steering order then sends projector to the serial ports sign indicating number by the serial ports level shifting circuit, realize the controls such as open and close to projector;
(50) microprocessor CPU 2 judgement information are that the infrared sign indicating number steering order of projector, DVD etc. is then sent the corresponding infrared sign indicating number of infrared learning storage by the infrared emission circuit, realize the infrared remote control to projector, DVD etc.;
(51) thus microprocessor CPU 2 judgement information are the power devices instruction of projector or computer etc. send the high level attracting electric relay to give power devices then for the driving circuit of corresponding relay;
(52) microprocessor CPU 2 judgement information then send to computer software to information by the serial ports level shifting circuit for the instruction of computer mouse Simulation Control, and computer software carries out the mouse function that analyzing and processing realizes computer to instruction;
(53) microprocessor CPU 2 judgement information are that control level realizes volume to electronic potentiometer size adjustment is then sent out in the volume regulating command;
(54) microprocessor CPU 2 judgement information are that the equipment switching command then carries out corresponding video switch, audio frequency switching or VGA switching according to device type;
At this moment, microprocessor CPU 2 judgement information are that the equipment switching command then carries out corresponding video switch, audio frequency switching or VGA switching processing according to device type in the above-mentioned steps (47), may further comprise the steps:
(471) read in user-defined equipment after the start of reception controller and switch the right of priority table;
(472) receive controller and regularly search the equipment that vision signal is arranged, search the equipment that the VGA signal is arranged by the VGA testing circuit by the Video Detection circuit;
(473) receive controller if detect certain video or the appearance of VGA signal, activate this equipment in the right of priority table; And it is current device that the priority level of this equipment is provided with this equipment on current device the time automatically;
(474) receive controller if detect certain video or VGA blackout, hide this equipment in the right of priority table; If this equipment is current device, then other the highest equipment of priority are changed into current device;
(475) when pressing switch key, terminal device sends handover information;
(476) receive controller and receive that handover information and identification information authentication are passed through after, change the equipment of next priority level or highest level into current device;
(477) be set as the video input state if the current device vision signal of selecting is then switched this signal to projector and with projector, be set as the VGA input state to projector and with projector if the VGA signal then switches this signal; If this equipment has audio frequency then simultaneously sound signal to be switched to power amplifier;
(478) receive the device numbering information that controller is sent completely switching, the expression handover success;
(479) terminal device is received the device numbering information of switching, shows this equipment at display screen.
Claims (13)
1, a kind of multimedia teaching control device of wireless is characterized in that comprising:
One has teaching indication and wireless mouse function and can send and have the remote information of terminal device identification marking and each multimedia equipment is carried out the terminal device that intelligent wireless is controlled to receiving controller;
One is used for the remote information of receiving terminal apparatus and the reception controller that each multimedia equipment is carried out corresponding control operation.
2, require 1 described multimedia teaching control device of wireless according to the right place, it is characterized in that above-mentioned terminal device includes microprocessor (CPU1) and is connected in regular turn with this microprocessor (CPU1) respectively:
Include the remote keypad of a plurality of switch keys, mousebutton, signal switching key, volume control key, multimedia equipment teleswitch composition;
Be used for storing device information, by key definition, the flash memory (X1) of parameter and director data is set;
Information after by FSK modulating part, PLL composite part, high-frequency emission being used for of partly forming microprocessor (CPU1) being handled is carried out the wireless launcher of modulate emission;
By being used for that power conversion part, rectifying and wave-filtering part and voltage stabilizing are partly formed to microprocessor (CPU1), the electric power management circuit of flash memory (X1) power supply and the laser indicating member that is connected with this electric power management circuit;
Wherein, microprocessor (CPU1) adopts C8051F221, AT89LS52, P89LX51 or other low-voltage single-chip microcomputer, this microprocessor (CPU1) receives and judges the information of remote keypad and be converted into the reception controller identifiable information of tape terminal device identification, again this information is delivered to wireless launcher by its I/O mouth and carries out modulate emission.
3, multimedia teaching control device of wireless according to claim 1 and 2 is characterized in that above-mentioned reception controller includes microprocessor (CPU2) and is connected in regular turn with microprocessor (CPU2) respectively:
Be used to store customer parameter, parameter be set, the flash memory (X2) of serial ports sign indicating number and infrared code data;
Be used to provide the electric power management circuit of various voltages;
The radio receiver of forming by high frequency receiving unit, PLL composite part, FSK demodulation part that is used for the control information of receiving terminal apparatus;
But the infrared learning and the infrared control circuit that are used to learn the infrared coding of telepilot of each multimedia equipment and these telepilots of emulation and can carry out remote control control to multimedia equipment;
Be used for serial ports control circuit that projector and computer are controlled;
Be used for the ON-OFF control circuit that the power supply to each multimedia equipment manages;
Be used for the video/audio signal of a plurality of multimedia equipments is switched to the frequency switch circuit of looking of projector and power amplifier;
Be used for the VGA signal of a plurality of computers is switched to the VGA commutation circuit of projector;
Be used for the volume control circuit that microphone volume and master volume are controlled;
Wherein, microprocessor (CPU2) adopts C8051F022, AT89S52, P89LX51 or other single-chip microcomputer, the control information of described wireless receiving circuit receiving terminal apparatus and it is sent into microprocessor (CPU2) and handles after again by microprocessor (CPU2) according to the classification of control information with it by corresponding infrared control circuit or serial ports control circuit or ON-OFF control circuit or look frequency switch circuit or VGA commutation circuit or volume control circuit are realized the control of corresponding multimedia equipment.
4, multimedia teaching control device of wireless according to claim 3 is characterized in that above-mentioned terminal device also includes one and is used to show and the display screen and the display panel control circuit that are connected with microprocessor (CPU1) of controlling various control commands.
5, multimedia teaching control device of wireless according to claim 3 is characterized in that above-mentioned reception controller also includes a wireless launcher of partly being made up of FSK modulating part, FLL composite part, high-frequency emission that is used for feedback informations such as the equipment switching state of microprocessor (CPU2) and volume are carried out modulate emission; And above-mentioned terminal device also includes a radio receiver of being made up of high frequency receiving unit, PLL composite part, FSK demodulation part that is used to receive feedback informations such as the equipment switching state of controller and volume.
6, multimedia teaching control device of wireless according to claim 3, it is characterized in that above-mentioned reception controller also include one be used for judging each multimedia equipment look audio interface and VGA interface have no signal and according to the RST of each multimedia equipment interface with realize multi-media signal detect automatically with being connected to of intelligence switching look between frequency switch circuit and the microprocessor (CPU2) look audio detection circuit and be connected in the VGA commutation circuit and microprocessor (CPU2) between the VGA testing circuit.
7, multimedia teaching control device of wireless according to claim 3, it is characterized in that above-mentioned reception controller also include one be used to realize according to the switch automatic lifting screen of projector the detection projector switch that is grouped into by sampling section, rectifying and wave-filtering part and Analog to Digital Converter section the time electric current projector's switch of changing detect and control circuit.
8, multimedia teaching control device of wireless according to claim 3, it is characterized in that above-mentioned reception controller also includes one and is used to realize that network remote is controlled and the network transmission circuit that is connected in microprocessor (CPU2) of telemanagement, it is connected with campus network by the Ethernet interface of standard.
9, multimedia teaching control device of wireless according to claim 3 is characterized in that above-mentioned terminal device also includes a digital speech radio transmitter of being made up of microphone and mould/number conversion circuit that is used for wireless public address; Above-mentioned reception controller also includes a digital speech wireless receiving circuit of being made up of D/A switch circuit and audio amplifier circuit.
10, a kind of multimedia teaching wireless control method is characterized in that may further comprise the steps:
(1) microprocessor of terminal device (CPU1) receives and this input information to be carried out function behind the input information of remote keypad and judge, and is the discernible control information of reception controller of tape terminal device identification with its conversion process;
(2) microprocessor (CPU1) is delivered to wireless launcher with the control information after the conversion process by its I/O mouth and is carried out modulate emission;
(3) radio receiver that receives controller receives and is transported to microprocessor (CPU2) after the control information of terminal device and carries out identification information judgment;
(4) microprocessor (CPU2) carries out analysis and judgement and classification processing to command information, and realizes corresponding multimedia control to identification information judgment and after confirming that it effectively.
11, multimedia teaching wireless control method according to claim 10, the wireless receiving circuit that it is characterized in that receiving in the above-mentioned steps (3) controller receives and is transported to microprocessor (CPU2) after the control information of terminal device and carries out identification information judgment, may further comprise the steps:
(31) when the push button, terminal device sends the packet of band unique identification information;
(32) in receiving controller, be provided with a label table of storing the identification information of all terminal devices that allow operation, after the reception controller is received packet, search identification information and whether in label table, exist, then carry out the control corresponding operation and return success information if exist; Do not send solicited message by the network transmission circuit to webmastering software if do not exist then;
(33) after webmastering software is received solicited message, then return agreement information, disagree with and then return refusal information if agree this terminal use;
(34) after the reception controller is received the agreement information of webmastering software, in label table, increase the identification information of this terminal device, carry out the control corresponding operation and also return success information;
(35) receive controller and receive that the refusal information of webmastering software or the information of not receiving then send refusal information; (36) terminal is received refusal information, and display screen shows haves no right operation indicating.
12, multimedia teaching wireless control method according to claim 10, it is characterized in that in the above-mentioned steps (4) microprocessor (CPU2) to identification information judgment effectively after, analysis and judgement realizes corresponding multimedia equipment with the classification processing control is carried out in instruction, and may further comprise the steps: (41) are if microprocessor (CPU2) judgement information is that the instruction of reception controller opens is then to looking power supplies such as frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit; If microprocessor (CPU2) judgement information is then closed power supplys such as looking frequency switch circuit, VGA commutation circuit, volume control circuit, infrared learning and infrared control circuit for receiving the controller out code;
(42) then the serial ports sign indicating number is sent projector by the serial ports level shifting circuit if microprocessor (CPU2) judgement information is projector's serial ports steering order, realize controls such as open and close projector;
(43) if microprocessor (CPU2) judgement information is the infrared sign indicating number steering order of projector, DVD etc. then to be sent the corresponding infrared sign indicating number of infrared learning storage by the infrared emission circuit, realize infrared remote control to projector, DVD etc.;
(44) if being the power supply instruction of projector or apparatus such as computer, microprocessor (CPU2) judgement information carries high level to give power devices then for the driving circuit of corresponding relay with attracting electric relay;
(45) if microprocessor (CPU2) judgement information then sends to computer software to information by the serial ports level shifting circuit for the instruction of computer mouse Simulation Control, computer software carries out the mouse function that analyzing and processing realizes computer to instruction;
(46) if being the volume regulating command, microprocessor (CPU2) judgement information then sends out control level realizes volume to electronic potentiometer size adjustment;
(47) if being the equipment switching command, microprocessor (CPU2) judgement information then carries out corresponding video switch, audio frequency switching or VGA switching according to device type.
13, multimedia teaching wireless control method according to claim 11, it is characterized in that microprocessor (CPU2) judgement information is that the equipment switching command then carries out corresponding video switch, audio frequency switching or VGA switching processing according to device type in the above-mentioned steps (47), may further comprise the steps:
(471) read in user-defined equipment after the start of reception controller and switch the right of priority table;
(472) receive controller and regularly search the equipment that vision signal is arranged, search the equipment that the VGA signal is arranged by the VGA testing circuit by the Video Detection circuit;
(473) receive controller if detect certain video or the appearance of VGA signal, activate this equipment in the right of priority table; And it is current device that the priority level of this equipment is provided with this equipment on current device the time automatically;
(474) receive controller if detect certain video or VGA blackout, hide this equipment in the right of priority table; If this equipment is current device, then other the highest equipment of priority are changed into current device;
(475) when pressing switch key, terminal device sends handover information;
(476) receive controller and receive that handover information and identification information authentication are passed through after, change the equipment of next priority level or highest level into current device;
(477) be set as the video input state if the current device vision signal of selecting is then switched this signal to projector and with projector, be set as the VGA input state to projector and with projector if the VGA signal then switches this signal; If this equipment has audio frequency then simultaneously sound signal to be switched to power amplifier;
(478) receive the device numbering information that controller is sent completely switching, the expression handover success;
(479) terminal device is received the device numbering information of switching, shows this equipment at display screen.
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| CNB2005100343712A CN100423035C (en) | 2005-04-28 | 2005-04-28 | Radio control device and method for multimedium teaching |
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| CNB2005100343712A CN100423035C (en) | 2005-04-28 | 2005-04-28 | Radio control device and method for multimedium teaching |
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| CN1725257A true CN1725257A (en) | 2006-01-25 |
| CN100423035C CN100423035C (en) | 2008-10-01 |
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| CNB2005100343712A Expired - Fee Related CN100423035C (en) | 2005-04-28 | 2005-04-28 | Radio control device and method for multimedium teaching |
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