CN1299192C - Remote-wireless controller for computer - Google Patents

Abstract

A long-distance wireless control device for a computer relates to the technical field of long-distance computer control by combining laser points and wireless signals. It is characterized in that: it contains a projector, a camera for capturing the projection screen, a laser pointer with a built-in laser generating and transmitting module and a radio coding and transmitting module, a receiver for receiving radio signals sent by the laser pointer, and internal signal processing, laser Computer for point recognition and mouse event synthesis programs. The radio signal receiver includes a radio signal receiving and decoding module, a high-low level conversion circuit, a single-chip microcomputer processing circuit, and a USB transmission interface module. The device of the present invention is intuitive and convenient to use, and the user can easily complete all operations of the ordinary mouse to control the computer. The device uses codec wireless signals to transmit information, and there is no interference between adjacent users. Computer control can be accomplished from anywhere in the space.

Description

A remote wireless control device for a computer

Technical field:

A long-distance wireless control device for a computer relates to the technical field of long-distance computer control combined with laser points and wireless signals.

technical background:

The traditional control computer devices are keyboard and mouse, both of which are connected to the host through data lines, and when interacting, the user must sit in front of the computer. The present invention provides a device for long-distance wireless control of a computer. The so-called long-distance wireless control computer means that the user operates the computer through a certain interactive device at a place far away from the computer host. The interactive device is not connected with the computer by a data line. The wireless signal transmits control information. With the increasingly widespread use of computers, long-distance wireless control computers have more and more application prospects, such as teachers teaching students in large classrooms, commanders completing information switching in command posts, etc. In these usage scenarios Under the current situation, users hope to be able to freely control the computer anywhere in the space.

Existing devices for wirelessly controlling computers mainly include a wireless mouse and a remote controller for controlling the playback of multimedia courseware.

The use of the wireless mouse is exactly the same as that of the ordinary mouse. The control of the mouse in the computer is realized by moving the mouse on a plane. The difference from the ordinary mouse is that the radio frequency or infrared mode is used to transmit the control information. The effective control distance is generally 2 rice. The downsides of wireless mice are:

1. The control distance is limited, and the ability of the signal to cross obstacles is poor. The effective control distance of the wireless mouse is generally 2 meters. When the teacher is teaching in a large classroom, it is often more than 10 meters away from the computer, and the wireless mouse cannot meet the requirements. In particular, the wireless mouse using the infrared transmission mode has high requirements on the directivity of the transmitted signal, and cannot pass through obstacles such as the human body and teaching aids.

2. Controlling the computer is not intuitive enough. The movement of the mouse on the horizontal plane or the movement of the scroll wheel is mapped to the mouse cursor on the screen. The user needs to distract a lot of attention to complete the control of the mouse.

3. The price is high and the volume is too large, so it cannot be used with a normal mouse at the same time. General computers are equipped with ordinary mice, and users will not buy a new mouse just to meet the needs of short-distance wireless control of computers. Moreover, the wireless mouse is too bulky, not as convenient as a laser pointer, and has little value in the field of long-distance operation of computers.

The remote control for playing multimedia courseware is small in size and easy to use, but its functions are very limited. It is limited to controlling the page-turning control of multimedia courseware, which cannot meet the user's requirements for further computer control. Such as controlling the movement of the mouse, double-clicking to start the application program, opening the right-click menu of the mouse and making a selection, etc., these functions cannot be realized by the multimedia playback remote control.

Invention content:

Aiming at the deficiencies and defects of the prior art, the present invention provides a device that can wirelessly control a computer at a long distance. The device can control a computer at a distance of 150 meters, and has powerful functions, and can realize all operations that can be accomplished with a common mouse , such as controlling the movement of the mouse, double-clicking to start the application, opening the right-click menu of the mouse, and dragging the icon on the screen to any position. In addition, the device is easy to carry, intuitive to operate, low in price, and can use an ordinary mouse at the same time. It has good application prospects in demonstration halls, large classrooms, auditoriums, command posts and other places.

The present invention is characterized in that: containing:

projector,

A camera for capturing images on the projection screen and transmitting the image information to a computer;

Laser pointer, built-in laser generation and emission module, point the emitted laser to the projection screen;

Built-in radio encoding and transmitting module, which encodes the information input by the user and transmits it to the wireless signal receiver with radio signals;

The wireless signal receiver is used to receive the radio signal sent by the above-mentioned laser pointer, and convert the radio signal into a digital signal and output it to the computer; the wireless signal receiver includes a radio receiving and decoding module, and a high-low level conversion circuit; The output end of the flat switching circuit is connected to a single-chip microcomputer solidified with a signal processing program, and the signal output end of the single-chip microcomputer is connected to the data acquisition end of the computer through an output interface;

The computer receives the screen image from the camera, collects the digital signal from the wireless signal receiver, and performs signal processing, laser point coordinate recognition and mouse event synthesis operation.

The present invention has the following advantages and beneficial effects: the long-distance wireless control computer device provided by the present invention can be used at a relatively large distance (within 150 meters), and can completely replace all functions of a common mouse. The user uses the laser point emitted by the laser pointer to directly control the position and movement of the mouse on the projection screen, which is intuitive and convenient. The left and right buttons integrated on the laser pointer can fully simulate the left and right buttons of a normal mouse. Using the invention, the user can easily complete all the operations of controlling the computer with a common mouse, such as controlling the movement of the mouse, double-clicking to start the application program, opening the right-click menu of the mouse and selecting, dragging the icon on the screen to any position, and turning the page of the presentation slide control etc. In addition, the device uses encoded and decoded wireless signals to transmit information, so there is no interference between adjacent users, and the wireless signals can cross obstacles, allowing users to control the computer at any position in the space.

Description of drawings:

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the working flowchart of wireless signal receiver in the present invention;

Fig. 3 is the structural representation of laser pen among the present invention;

Fig. 4 is a schematic diagram of a wireless signal receiver circuit in the present invention, Fig. 4a is a schematic diagram of a radio receiving and processing module and a high-low level conversion circuit, Fig. 4b is a schematic diagram of a single-chip microcomputer processing circuit, and Fig. 4c is a principle diagram of a USB interface circuit picture;

Fig. 5 is a flow chart of the internal program of the single-chip microcomputer on the wireless signal receiver in the present invention;

Fig. 6 is a flowchart of the built-in software program of the computer.

Detailed ways:

The device includes a projector, a camera for capturing the projected screen, a laser pointer with a built-in laser generating and transmitting module and a radio coding and transmitting module, a receiver for receiving electrical signals from the laser pointer, and internal storage for signal processing. , laser point recognition and mouse event synthesis program computer. The receiver for receiving the electrical signal sent by the laser pointer includes a radio signal receiving and decoding module, a high-low level conversion circuit connected to the output of the radio signal receiving and decoding module, and a solidification circuit connected to the output of the high-low level conversion circuit. There is a single-chip microcomputer processing circuit for signal processing and controlling the USB chip program, and a USB transmission interface module connected with the output end of the single-chip computer; the computer is connected with the USB transmission interface module through the USB interface.

The principle and structure of the present invention will be further described below in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the overall structure of the device, including a camera 1, a projector 2, a laser pointer 3 integrated with a laser emitting module and a wireless signal transmitting module, a receiver 4 for receiving signals emitted by the laser pointer, and an internal storage device. Computer 5 for signal processing, laser point recognition and mouse event synthesis programs. The projector 2 projects the image of the computer display onto the large screen (or wall), the user uses the laser pointer 3 to emit laser points onto the large screen (or wall), and the computer 5 obtains the large screen (or wall) through the camera 1 The image information on the computer and the position of the laser point are identified, and it is positioned as the mouse coordinates in the computer through coordinate transformation. In addition, the laser pointer 3 can also send out wireless signals simulating the actions of the left and right buttons of a common mouse, and the signal receiver 4 receives the wireless signal of the laser pointer 3 and transmits it to the computer 5 through the USB port. The mouse coordinate information and the left mouse button or right button action information transmitted by the receiver 4 are synthesized into a complete mouse event, thereby completing the control of the computer 5 .

The detailed working principle of the present invention is as follows: the user uses a laser pointer to send laser points to the large screen (or wall), the camera captures the image information on the large screen (or wall) and transmits it to the computer, and the program in the computer recognizes Output the coordinates of the laser point relative to the large screen (or wall) and convert it to the mouse coordinates on the computer monitor through coordinate transformation. On the other hand, the user uses the left button or right button on the laser pointer to send the simulated "press" and "bounce" action information of the left or right button of the mouse through the radio coding and transmitting module; within a range of 150 meters Inside, the wireless signal receiver can receive the signal. The working principle of the wireless signal receiver is shown in Figure 2. The radio signal receiving and processing module on the receiver receives and decodes the radio signal sent by the laser pointer, and then transmits the decoded signal to the high-low level conversion circuit. The conversion circuit converts the received signal into a low level and then transmits it to the single-chip microcomputer as an input signal. The single-chip microcomputer processes the signal and sends it to the USB transmission interface module, and the USB transmission interface module finally transmits the signal to the computer through the USB interface; the computer receives After this signal, the system function is called to simulate it as the "press" and "bounce" actions of the left or right mouse button, and combined with the mouse coordinate information obtained at the beginning, it can be synthesized into a complete mouse event. Long-distance wireless realization of all the functions of a common mouse, convenient and intuitive control of the computer.

The structure of the laser pointer is shown in Figure 3. The laser pointer includes two parts: a built-in laser emitting circuit and a built-in radio emitting module. In this embodiment, the laser emitting circuit adopts an ordinary laser emitting tube (3.0V, 20mA, wavelength 650nm), and the wireless encoding emitting module SB200-4Aa common in the market is used as the wireless encoding emitting module. There are three buttons A, B, and C on the pen; A and B correspond to buttons a and b on the SB200-4Aa module respectively, and button C is the laser emission switch. When A is pressed, a radio signal simulating the "press" action of the left mouse button is sent out; when A is released, a radio signal simulating the "pop-up" action of the left mouse button is sent out; when B is pressed, a radio signal simulating the "press" action of the right mouse button is sent out signal, release B to send a signal simulating the "bounce" action of the right mouse button. Only fires laser when C is pressed. The coded radio signal emitted by the laser pointer can be received by a wireless signal receiver within a range of 150 meters.

The circuit connection relationship of the receiver used to receive the radio signal emitted by the laser pointer is shown in Figure 4A, 4B and 4C, the circuit can be divided into four parts: radio receiving and decoding module, high-low level conversion circuit, single-chip processing circuit, USB transmission interface. Among them, the radio receiving and decoding module is the first part. In this embodiment, the common wireless receiving and decoding module CZS-8 (corresponding to the radio code transmitting module on the laser pointer) is adopted in the market. The high-low level conversion circuit uses the 74LS00 chip, single-chip processing circuit uses AT89C52 chip, and USB transmission interface uses PDIUSBD12 chip. The signal processing process is that the wireless receiving and decoding module receives and decodes the radio signal sent by the laser pointer, and sets the corresponding output pin to a high level, which becomes a low level signal through a high-low level conversion circuit, and the microcontroller receives The low level signal, and control the USB interface to transmit this signal to the computer. The connection relationship between them is: pin 6 of the radio receiving and decoding module is connected to +5V, pin 7 is grounded, and pin 4 and pin 5 are respectively connected to pin 1 and pin 74LS00 in the high-low level conversion circuit. 4. Output the received wireless signal to the high-low level conversion circuit respectively, the pin 3 and pin 6 of the 74LS00 chip in the high-low level conversion circuit are respectively connected to the signal input terminal of the AT89C52 chip in the single-chip processing circuit (pin 1 and Pin 2), for signal processing in the MCU. Pins 32-39 of the AT89C52 chip are respectively connected to 1-4 and 6-9 of the PDIUSBD12 chip in the USB interface module for data transmission, and pins 7, 8, 12, 13, 16, 17, and 30 of the AT89C52 are respectively connected to the PDIUSBD12 11, 20, 14, 12, 16, 15, and 10 are connected to carry out relevant initialization and transmission control. The remaining electrical components not mentioned belong to the peripheral circuits of the AT89C52 chip and the PDIUSBD12 chip.

The program flow chart of the single-chip microcomputer is shown in Figure 5. After the single-chip microcomputer is powered on and started, the IO port timer and interrupt are automatically initialized, and the USB bus connection is established with the computer through the PDIUSBD12 chip, and then the program enters a loop to check whether there is a signal received. If so, then Judgment and send the corresponding signal code, and upload to the computer through the USB interface, so as to complete the reception and transmission of the signal. If no signal is received, the loop query continues.

The program flow chart in the computer is shown in Figure 6. After the program runs, the laser point recognition thread and the response signal receiving thread are automatically started at the same time. In the laser point recognition thread, the computer reads the large-screen image information from the camera, and finds the red laser point from it, and locates it as the mouse coordinates through coordinate transformation; in the response signal receiving thread, the computer cyclically inquires the input signal of the USB port, if If there is a signal input, it is simulated as a corresponding mouse action, and combined with the mouse coordinates obtained in the laser point recognition thread, it is synthesized into a complete mouse event. In order to complete the control of the computer.

Claims (6)

1, a kind of remote-wireless controller for computer is characterized in that, contains:

Projector,

Camera is used to catch the projection screen image, and picture information is transferred to computing machine;

Laser pen, built-in laser produces and transmitter module, and emitted laser is pointed to projection screen;

Built in radio coding and transmitter module pass to wireless signal receiver with the information coding of user's input and with radio signal;

Wireless signal receiver is used to receive the radio signal that above-mentioned laser pen sends, and radio signal is converted into digital signal exports to computing machine; This wireless signal receiver comprises radio reception and decoder module, the high-low level change-over circuit; Described high-low level change-over circuit output terminal connects the single-chip microcomputer that is solidified with signal handler, and the signal output part of described single-chip microcomputer connects the data acquisition end of described computing machine by output interface;

Computing machine receives the screen image that camera transmits, and gathers the digital signal that wireless signal receiver transmits, carry out signal Processing,

2, remote-wireless controller for computer as claimed in claim 1 is characterized in that, what described radio reception and decoder module adopted is the CZS-8 module.

3, remote-wireless controller for computer as claimed in claim 1 is characterized in that, what described high-low level change-over circuit adopted is the 74LS00 chip.

4, remote-wireless controller for computer as claimed in claim 1 is characterized in that, what described single-chip microcomputer adopted is the AT89C52 chip.

5, remote-wireless controller for computer as claimed in claim 1 is characterized in that, the signal output part of described single-chip microcomputer is the data acquisition end that the USB interface of PDIUSBD12 chip connects described computing machine by adopting model.

6, remote-wireless controller for computer as claimed in claim 1 is characterized in that, the radio coding that described laser pen is built-in and the model of transmitter module are SB200-4Aa.

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