CN101114260A - An intelligent presentation device for presentation of electronic documents - Google Patents

Abstract

The invention discloses an intelligent demonstration device for electronic document demonstration. The device is composed of a handheld terminal and a host terminal connected by wireless digital communication; the handheld terminal includes a microprocessor 1 and a demonstration control module connected to its signal, a wireless digital communication module 1, a signal conversion module 1, a signal conversion module 2 and a recording and playback interface ; The host end includes a microprocessor two, and a memory module connected to the microprocessor two, a serial universal interface module and a wireless digital communication module two; the wireless digital communication module one and the wireless digital communication module two are connected by communication signals . By adopting the intelligent demonstration device for electronic document demonstration of the present invention, the speaker can move freely in the lecture place, transmit voice, flexibly control the playback of electronic documents and write on the electronic blackboard, and can browse synchronous prompt information or play recordings during the speech process .

Description

An intelligent presentation device for presentation of electronic documents

technical field

The invention relates to a device for realizing intelligent document demonstration, in particular to an intelligent document demonstration device for realizing remote mouse control, wireless digital code sending and receiving, handwriting, presentation synchronization prompt and memory management through an embedded digital controller.

Background technique

Document presentation is an important part of teaching and conferences. With the continuous development of IT technology, the mode of document presentation is also improving day by day. PC-based electronic document presentation has become the mainstream way of document presentation, while the auxiliary equipment for document presentation is mainly keyboard, mouse and wireless microphone. During the speech, the speech document is played on the PC, and is projected on the screen through a projector connected to the PC for output. During the speech, if the speaker needs to leave the PC and go to the stage, or leave the platform and approach the audience, the PC will be unmanned and cannot continue to play the electronic document. And hiring an assistant to stay in front of the PC to take charge of the control requires the speaker and the assistant to cooperate quite well. Otherwise, if the content of the speech is not synchronized with the control of the presentation, it will both disturb the performance of the speaker and affect the thoughts of the audience. On the other hand, for general classrooms, lectures, or company meetings, etc., since the contents of speeches are often many, and the presentation documents are large in length, the time for speeches is often limited. Even if the speaker has made sufficient preparations, it is difficult for the speaker to grasp all the key points and memorize the whole process by heart. During the speech process, it is inevitable to stop frequently, read the document, and sort out the train of thought. This not only reduces the efficiency of the speech, but also greatly affects the audience's reception. In the third aspect, the benefits of electronic document presentation to speech are self-evident, but the function of blackboard writing required for speech is also very important. Traditional blackboard writing limits the scope of activities of the speaker on the podium, while electronic blackboard writing is more It is to limit the range of activities of the speaker to the PC, which is not conducive to the interactivity of the speech.

Therefore, how to eliminate these shortcomings has become an urgent technical problem to be solved in presentations based on electronic document presentations. Based on wireless digital transmission technology, intelligent demonstration equipment that provides wireless electronic document demonstration control, electronic blackboard writing, and demonstration synchronization prompting functions is proposed for the above problems. As far as the demonstration effect is concerned, it can be found that this technology helps the presenter to play flexibly and interact with the audience.

Contents of the invention

An object of the present invention is to provide an intelligent presentation device for electronic document presentation, which solves the problem of complicated existing electronic document presentation auxiliary equipment, many buttons, inconvenient operation or inability to move, restricting the activities of the speaker, and affecting the speaker and the audience. The problem of interaction causing obstacles has played a role in improving the presentation effect.

The purpose of the present invention is achieved through the following technical solutions:

An intelligent demonstration device for electronic document demonstration, characterized in that the device is composed of a handheld terminal and a host terminal connected by wireless digital communication; Communication module one, signal conversion module one, signal conversion module two and audio recording and playback interface; Described microprocessor one is connected with demonstration positioning detection sensor by signal conversion module one and transmission positioning information line; Described microprocessor one is also connected by signal The conversion module two and the transmission input signal line are connected with the handwriting sensing device; the microprocessor one is also connected with the synchronous prompt display screen through the signal conversion module two and the display signal line; the audio recording and playback module is connected with the microprocessor one through the recording and playback interface signal connection;

The host end includes a microprocessor 2, and a memory module connected to the microprocessor 2, a serial universal interface module and a wireless digital communication module 2;

The first wireless digital communication module and the second wireless digital communication module are wirelessly connected through communication signals.

For further realizing the object of the present invention:

The first microprocessor at the handheld end and the second microprocessor at the host end are single-chip microcomputers, embedded microprocessors, DSPs or FPGAs.

The single-chip microcomputer is ATMEGA series, MSP430 series or ADμC series; the embedded microprocessor is AT91SAM series; the DSP is TMS320 series; and the FPGA is Cyclone series.

The demonstration position detection sensor includes a two-axis or three-axis angular velocity sensor, an electronic gyroscope, or an integrated sensor.

The demonstration control module is a group of keys, corresponding to the left and right keys of the mouse, the up and down direction keys of the scroll wheel, and the keys mapped to the keyboard or a combination of hot keys.

The handwriting sensing device is a writing board or a handwriting film; the synchronous prompt display screen is a liquid crystal screen that can display corresponding characters under the configuration and drive of a microprocessor.

The serial universal interface module is a USB interface circuit based on the serial universal interface configuration chip pdiusbd12.

The first wireless digital communication module and the second wireless digital communication module are a pair of duplex wireless communication circuits.

The memory module is used to manage a mobile storage device conforming to a USB interface or an SD card interface.

Described signal conversion module one is the ADC9237 type analog-to-digital converter that converts the signal output by the demonstration positioning detection sensor into a digital signal that can be directly recognized by processor one; The digital signal that can be directly recognized by the processor 1, and the digital signal representing the display graphics output by the processor 1 is converted into a TSC2102 touch screen controller for driving the signal of the synchronous prompt display screen.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

(1) The intelligent demonstration device for electronic document demonstration of the present invention breaks through the slowness and inaccuracy of cursor positioning through keys, and improves usability.

(2) Through the support of the processor platform, a leap in the function of the electronic document demonstration tool has been truly realized, and the dilemma of simple integration of demonstration equipment and functions has been fundamentally solved. Improve the flexibility and presentation efficiency of electronic document presentations. By adopting the intelligent demonstration device for electronic document demonstration of the present invention, the speaker can move freely in the lecture place, transmit voice, flexibly control the playback of electronic documents and write on the electronic blackboard, and can browse synchronous prompt information or play recordings during the speech process .

Description of drawings

Fig. 1 is a block diagram of an intelligent demonstration device for electronic document demonstration;

Fig. 2 is a schematic diagram of the external device of the intelligent demonstration device used for electronic document demonstration in Fig. 1;

Fig. 3 is a block diagram of the software flow of the handheld terminal;

Figure 4 is a block diagram of the host software flow.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in FIG. 1 , the smart presentation device for electronic document presentation of the present invention consists of a handheld terminal 200 and a host terminal 100 . Wherein, the host terminal 100 includes a microprocessor 2 101 , a memory module 102 connected to the microprocessor, a serial universal interface module 103 and a wireless digital communication module 2 104 .

The serial universal interface module 103 is based on the USB interface circuit of the serial universal interface configuration chip pdiusbd12, and can describe the serial device to the PC under the control of the microprocessor 2, thereby becoming various types of subordinate external devices of the PC, Get PC resources and realize communication with PC.

The second wireless digital communication module 104 and the first wireless digital communication module 106 form a pair of duplex wireless communication circuits. The communication circuits are both based on TI's wireless digital communication series chips, and the typical model is CC2510. The first wireless digital communication module 106 receives demonstration synchronous prompt information and recording signals sent by the host, and the second wireless digital communication module 104 sends real-time control signals and signals from the recording interface. Specifically, the wireless digital communication module 2 104 is used to transmit communication signals through wireless digital encoding and decoding. necessary signals;

The memory module 102 is used to manage and support U disk, MP3 and other mobile storage devices conforming to the USB interface or SD card interface specification, such as the USB host interface based on CH375.

The second microprocessor 101 can be a single-chip microcomputer, an embedded microprocessor, DSP or FPGA. The single-chip microcomputer can be a single-chip microcomputer such as ATMEGA series, MSP430 series or ADμC series; the embedded microprocessor can be a microprocessor such as AT91SAM series; DSP can be TMS320 series; FPGA can be Cyclone series of Altera Company. The management software included in it can manage memory modules, serial general interface modules and wireless digital communication modules. The management software reads and writes the data inside the memory module through the memory management subroutine, completes the description of the external serial slave device to the PC and communicates with the PC through the general serial interface subroutine, and manages the wireless digital data through the wireless communication sending and receiving subroutine. Signal sending and receiving of the communication module.

The handheld terminal 200 includes a microprocessor 105 , a demonstration control module 107 , a demonstration positioning detection sensor 110 , a handwriting sensing device 111 , a synchronous prompt display screen 112 , an audio recording and playback module 113 and a wireless digital communication module 106 . Wherein, demonstration control module 107 links to each other with microprocessor one 105; Demonstration location detection sensor 110 is connected with microprocessor one 105 by signal conversion module one 108, transmits positioning information to microprocessor one 105; Handwriting sensing device 111 passes signal Transformation module two 109 is connected with microprocessor one 105, transmits input signal to microprocessor one 105; display signal; the audio recording and playback module 113 is connected with the microprocessor one 105 through the recording and playback audio interface 114; the wireless digital communication module one 106 is directly connected with the microprocessor one 105.

Microprocessor one 105 can be a single-chip microcomputer, an embedded microprocessor, DSP or FPGA. MCU can be such as ATMEGA series, MSP430 series or ADμC series; embedded microprocessor can be AT91SAM series, etc.; DSP can be TMS320 series, etc.; FPGA can be Altera's Cyclone series, etc. The microprocessor provides an interface to all devices connected to the processor through an embedded system program or a dedicated management program. The processor is also responsible for processing information, encoding and decoding signals, controlling various inputs and outputs, and coordinating the transmission of wireless digital signals.

The demonstration positioning detection sensor 110 adopts a two-axis or three-axis angular velocity sensor or an electronic gyroscope, such as the "ultra-small quartz crystal angular velocity sensor EWTS82" produced by Panasonic, and it is better to use an integrated sensor with a higher integration level, such as Honey The HCS01 multi-functional sensor module produced by Will Company has integrated a 3-axis magnetic sensor and a 3-axis acceleration sensor inside, which can realize orientation correction while completing motion detection. According to the direction of motion, angular velocity or relative displacement and other similar motion characteristics, electrical signals that are linear or functionally related to these characteristics are generated to describe the nature of spatial motion. It is used to detect the rotation of the user's wrist or the wave of the arm. Through the operation of the processor, it is mapped to the movement of the mouse plane coordinates, that is, it is used to map the movement of the demonstrator's wrist to the coordinates of the PC mouse, which solves the problem of existing wireless demonstration equipment. The operation of controlling the mouse by buttons is inconvenient and the positioning is inaccurate.

Demonstration control module 107 is a group of buttons, respectively corresponding to the left and right buttons of the mouse, the up and down direction of the scroll wheel, and some specific buttons or hotkey combinations of the mapped keyboard, through the input detection and processing of the microprocessor-105, used User input devices for generating computer actions, such as left-click, right-click or combined hotkeys, etc.; since the detection process and key definition are defined based on the processor, the demonstration control module can change the function definition according to specific needs.

The handwriting sensing device 111 is a handwriting tablet or a handwriting film, capable of outputting corresponding level signals by sensing the pressure of the pen tip and the position where the pressure is generated. The synchronization prompt display screen 112 is a liquid crystal screen, that is, a liquid crystal display (LCD), which can display corresponding characters under the configuration and drive of the microprocessor 105, and is used to display the prompt information of demonstration synchronization to the demonstrator on the handheld terminal. The prompt information is sent by the host computer and received by the wireless digital communication module 106 controlled by the microprocessor 105, which is synchronized with the current demonstration content. The handwriting sensing device 111 and the synchronous prompt display screen 112 can be a handwriting tablet and a liquid crystal display (LCD) respectively, or can be a handwriting screen integrating handwriting and display functions.

The wireless digital communication module 106 is a duplex wireless digital transceiver whose bandwidth is sufficient to transmit encoded digital audio signals and control signals. It is used to transmit communication signals through wireless digital coding and decoding. The communication signals include digital audio channels, digitally coded demonstration control signal transmission channels, synchronous prompt information reception channels and necessary communication signals.

The audio recording and playback module 113 is used for receiving and playing audio signals or recording voice signals sent by the speaker immediately. The audio recording and playback interface 114 may be a digital audio codec and a supporting signal amplifying circuit, or an ADC, DAC and a corresponding signal amplifying circuit built in a processor.

The signal conversion module 1 converts the signal output by the demonstration positioning detection sensor 110 into a digital signal that can be directly recognized by the processor 105 , and the analog-to-digital converter ADC9237 of ADI Company can be selected. The signal conversion module 2 converts the signal output by the handwriting sensing device 111 into a digital signal that can be directly recognized by the processor 1, and converts the digital signal representing the display graphics output by the processor 105 into a digital signal for driving the synchronous prompt display screen 112 signal, you can choose TI's touch screen controller TSC2102.

As shown in Figure 2, the serial universal interface module 103 of host terminal 100 is connected with the PC 404 of demonstration electronic document, and PC 404 is connected with projector 405; Host terminal 100 is connected with mobile memory 403 by memory module 102, The host terminal 100 is also connected to an antenna 406 . The handheld terminal 200 is respectively connected to the microphone 401 and the earphone 402 through the audio recording and playback module 113 . When the lecturer needs to make a speech or a report, the lecturer first connects the serial universal interface module 103 of the host terminal 100 of the present invention to the PC 404 used for demonstrating electronic documents through an extension line, and transfers the mobile data stored in advance to demonstrate the prompt data. The memory 403 is inserted into the host terminal 100 and connected to the antenna 406 . The speaker holds the hand-held terminal 200 of the present invention, and is equipped with a microphone 401 and earphone 402 as required to start a speech.

As shown in Figures 1 and 2, the speaker holds the hand-held terminal 200 in the air and waves it in the air, and the demonstration positioning detection sensor (angular velocity sensor) 110 detects the rotation speed and direction of the wrist, and transmits it to the microprocessor-1 through the signal conversion module-108 105. Microprocessor one 105 obtains the motion information and transforms it through internal calculations, then controls wireless digital communication module one 106 to transmit to space. The host terminal 100 receives the signal through the antenna 406 , the microprocessor 101 obtains the signal amount through the wireless digital communication module 2 104 , and transmits it to the PC 404 through the serial universal interface module 103 .

Processor 2 101 of the host terminal 100 enumerates the device type to the PC 404 through the serial universal interface module 103 when the host system is initialized, and automatically registers as a mouse and keyboard, so that when the PC 404 receives the host terminal 100 transfer When the incoming data, as long as the data is correct, it can realize the control of the mouse and keyboard on the computer, and even complete the operation of hotkey combination. Based on the above working process, the speaker can complete all the document presentation control functions that originally required the mouse and keyboard to complete by simply waving the wrist and a few preset touch buttons, and the operation is more concise and natural .

When the speaker needs to carry out electronic writing on the blackboard to cooperate with the speech, the speaker switches to the handwriting mode, and then draws on the handwriting sensor device 111 (handwriting screen), and the handwriting screen 111 at the handheld end generates a corresponding coordinate signal, which passes through the signal conversion module 2 109, pass to microprocessor one 105. Microprocessor 105 at first sends the hotkey key value of pen-shaped tool after receiving handwriting switch order, transmits to PC 404, calls out the pen-shaped tool of document presentation software; , so that the trajectory of the tablet is directly mapped to the trajectory of the mouse. The user's drawing on the handwriting screen 111 is directly converted into a stroke image output by the projector 405 connected to the PC 404, thereby completing the function of the electronic blackboard writing.

As shown in Figure 2, when the lecturer holds the hand-held terminal 200 to make a speech, the hand-held terminal 200 maintains a communication state with the host terminal 100, and the lecturer presses the preset key button) sends document page switching instructions to microprocessor one 105. The first microprocessor 105 sends signals to the host terminal 100 by controlling the first wireless digital communication module 106 . After the host end microprocessor 2 101 obtains the page parameters from the hand-held terminal through the wireless digital communication module 2 104 (wireless interface), it controls the universal serial interface 103 to communicate with the PC 404 on the one hand, and controls the mobile memory module 102 to search and The corresponding synchronization prompt information inside the mobile storage 403 is read. Then, the second microprocessor 101 sends data to the handheld terminal through the second wireless digital communication module 104 . After the microprocessor one 105 of the handheld terminal 200 receives the prompt information through the digital communication interface one 106, if there is text information, it is sent to the signal conversion module two 109 connected to the synchronization prompt display screen 112, and the synchronization prompt information is displayed on the synchronization prompt display On the screen 112; if there is an audio prompt signal, it will be sent to the recording and playback interface (ADC, DAC module) 114, and the synchronous prompt voice will drive the speaker's earphone 402 through the recording and playback interface of the audio recording and playback module 113. Thereby the synchronous prompting function is completed.

While the lecturer is giving a speech, the microphone 401 picks up the speech signal of the lecturer, and this signal is sent to the recording and playback interface of the audio recording and playback module 113 for processing, and then sent to the recording and playback interface 114 for conversion into a digital audio stream, and then through microprocessing The compression code of device one 105 is transmitted to the host terminal 100 through wireless digital communication module one 106. The microprocessor 2 101 at the host end obtains the digital audio stream through the wireless digital communication module 104 , and after format conversion, controls the serial universal interface module 103 to transmit it to the PC 404 . The PC plays through the decoding output, thus completing the remote transmission and playback of the speech signal.

As shown in Figure 3, the internal management software of the handheld terminal 200 includes the management task program of each module, and each task is assigned a certain priority, and is executed in the mode of task scheduling during operation, thereby realizing the demonstration control module 107 and the signal conversion module. Management of one 108, signal conversion module two 109, wireless digital communication module one 106 and audio recording and playback module 113. Specifically, the management of a pair of handheld terminals by the internal management software of the handheld terminal 200 includes the following tasks:

(1) by I/O scanning, detect the input action of demonstration control module 107; (step 301)

(2) Through the signal conversion input task, read in the signal transmitted through the signal conversion module one 108 from the external interface, and the signal output by the demonstration positioning detection sensor 110; (step 302)

(3) read and write tasks through the handwriting screen, and complete the reading of the handwriting sensing device 111 and the display control of the synchronous prompt display screen 112 through the signal conversion module two 109 communication; (step 303)

(4) manage the signal sending and receiving of wireless digital communication module one 106 by wireless communication sending and receiving tasks; (step 304)

(5) Through the audio processing task, the control processor one 105 samples the signal input by the audio recording and playback module 113 from the audio recording and playback interface 114 , or outputs the signal to the audio recording and playback module 113 through the audio recording and playback interface 114 . (step 305)

As shown in Figure 4, the internal management software 2 of the host terminal 100 includes the management task program of each module, and each task is assigned a certain priority, and is executed by the mode of task scheduling during operation, thereby realizing the memory module 102, the serial universal interface Management of module 103 and wireless digital communication module 2 104. Specifically, the internal management software 2 of the host terminal 100 includes the following tasks:

(1) read and write data inside the memory module 102 through memory management; (step 306)

(2) Complete the description of the external serial slave device to the PC and the communication to the PC through the general serial interface. (step 307)

(3) Sending and receiving of signals realized by the wireless digital communication module 2 104 . (step 308)

The internal management software 1 and 2 both list the respective wireless communication sending and receiving tasks 304 and 308 as higher priority processes, so that the real-time performance of the wireless communication will be given priority when scheduling tasks. During operation, various tasks are executed in turn through the task scheduling mechanism, and each task can get the execution time of the processor. Due to the fast task switching speed, all tasks are processed at the same time macroscopically, and there will be no obvious program delay.

Claims (10)

1. intelligent demonstration equipment that is used for electric document demonstration is characterized in that this equipment is made up of the handheld terminal and the host side of wireless digital communication contact;

Described handheld terminal comprises microprocessor one and the demonstration control module that is connected with its signal, wireless digital communication module one, signal conversion module one, signal conversion module two and recording playback sound interface; Described microprocessor one is connected with the demonstration orientation detection sensors with transmission locating information line by signal conversion module one; Described microprocessor one also is connected with hand-written sensing equipment with the transferring input signal line by signal conversion module two; Described microprocessor one also is connected with pointing out display screen synchronously with display signal line by signal conversion module two; The audio recording and reproducing module is connected with microprocessor one signal by recording playback sound interface;

Described host side comprises microprocessor two, and the memory module that links to each other with microprocessor two respectively, serial common interface module and wireless digital communication module two;

Pass through the communication signal wireless connections between wireless digital communication module one and the wireless digital communication module two.

2. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that the microprocessor one of described handheld terminal and host side microprocessor two are respectively single-chip microcomputer, embedded microprocessor, DSP or FPGA.

3. the intelligent demonstration equipment that is used for electric document demonstration according to claim 2 is characterized in that described single-chip microcomputer is ATMEGA series, MSP430 series or AD μ C series; Described embedded microprocessor is an AT91SAM series; Described DSP is a TMS320 series; Described FPGA is a Cyclone series.

4. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described demonstration orientation detection sensors comprises two or three angular-rate sensor, electronic gyroscope, perhaps integrated transducer.

5. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1, it is characterized in that described demonstration control module is one group of button, correspond respectively to the right and left key of mouse, the up and down arrow keys of scroll wheel, and the button of mapping keyboard or hot key combination.

6. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described hand-written sensing equipment is for writing plate or hand-written film; Described synchronous prompting display screen is for can be in the configuration of microprocessor and demonstrate the LCD screen of corresponding character under driving.

7. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described serial common interface module is based on the usb circuit of serial general-purpose interface configuring chip pdiusbd12.

8. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described wireless digital communication module one and wireless digital communication module two are wireless communication lines of a pair of duplex.

9. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described memory module is to be used to manage the movable storage device that meets USB interface or SD card.

10. the intelligent demonstration equipment that is used for electric document demonstration according to claim 1 is characterized in that described signal conversion module one is the ADC9237 pattern number converter of the digital signal can be directly discerned by processor one for the conversion of signals that will demonstrate orientation detection sensors output; Signal conversion module two is the digital signal of conversion of signals for can directly being discerned by processor one with hand-written sensing equipment output, and the digital signal of the representative display graphics of processor one output is converted to the TSC2102 type touch screen controller that is used to drive synchronous prompting display screen signal.

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