KR20030038883A - Motion detect device using p.s.d. sensor - Google Patents

Abstract

PURPOSE: A device for detecting motion using a PSD(Position Sensitive Detectors) sensor is provided to transmit the real time data precisely measured the 3-dimensional fast motion through the network and offer a cheap and popular motion detection device to recognize the 3-dimensional fast motion information. CONSTITUTION: A plurality of LEDs(21-23) is installed to the positions different with each other and respectively emits the light of a different frequency. A position detector(30) detects the motion by receiving the lights emitted in the different frequencies from the LEDs(21-23). A plurality of lenses(41,42) respectively collects the lights from the LEDs(21-23) by installing between the LEDs(21-23) and the motion detector(30). A PC(50) detects the 3-dimensional motion and displays the position by receiving the motion capture data detected from the motion detector(30). The motion detector(30) comprises the first and the second PSD(31,32) detecting the motion of the LED by receiving the lights collected from the lenses(41,42), an A/D(Analog/Digital) converter(33) converting the motion data into the digital data, and a USB(Universal Serial Bus) interface(34).

Description

Motion detection device using PSD sensor {MOTION DETECT DEVICE USING P.S.D. SENSOR}

The present invention relates to a motion detection device, and more particularly to a motion detection device for detecting motion information that operates at a high speed.

In general, the virtual reality device reproduces the dynamic change according to the virtual environment by the haptic devices such as HMD (HEAD MOUNTED DISPLY) and the chair, which are controlled by the computer. It is widely used for games, etc., to make people feel. Most of these PC games are 2D games using a mouse, keyboard or joystick, and 3D games are still in the introductory stage, but a 3D game using a head mounted display (HMD) or a 3D large actuator and a 2D monitor are complex. Games are mainly being developed. However, in the future, in order to develop a system that combines sports and leisure and games that require a lot of gamers' movements, it is possible to detect three-dimensional high-speed motions that can accurately transmit high-speed data through a network in real time. Technology is required.

As such, in order for the gamers to experience the 3D game virtually, the 3D motion information of the user inputted at high speed on the PC should be detected. An application product using a camera or an application product using a sensor to detect the 3D motion information For example, DDR was developed.

Products that perform stereo vision or SHARP FROM FOCUS using such cameras cannot be transmitted over the network in real time with the maximum measurement speed of 30 FRAME / SEC. There was a difficult and expensive problem.

Accordingly, an object of the present invention is to provide a motion detection apparatus capable of transmitting data over a network in real time to accurately measure the three-dimensional high-speed operation to solve the above problems.

Another object of the present invention is to provide a motion detection apparatus capable of recognizing 3D high speed motion information of low cost / distribution type.

1 is a block diagram of a schematic motion detection apparatus according to an embodiment of the present invention

2 is a detailed configuration diagram of a motion detection device for detecting a high speed motion according to an embodiment of the present invention

Explanation of symbols on the main parts of the drawings

10: gamers 21, 22, 23: first to third light emitting elements

30: PSD module 31, 32: first and second PSD

33: A / D converter 34: USB interface

41, 42: lens 50: personal computer

The motion detection device of the high speed operation of the present invention for achieving the above object is a plurality of light emitting elements which are installed at a plurality of different locations and emit light at different frequencies, and the light emitted at different frequencies from the plurality of light emitting elements A position detector for detecting motion, a plurality of lenses disposed between the plurality of light emitting elements and the motion detector, for condensing light emitted from the plurality of light emitting elements, and motion capture data detected by the motion detector. And a personal computer which receives and detects a three-dimensional motion and displays its position.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a schematic motion detection apparatus according to an embodiment of the present invention.

10 is a gamer for playing a game, and 21, 22, and 23 are first to third light emitting devices installed on body parts of the gamer 10, for example, hands, heads, shoulders, and the like and emit light at different frequencies. 30 receives a light emitted from the first to third light emitting elements 21, 22, and 23 to detect the movement of the light emitting elements 21, 22, and 23 to detect the motion of the gamer 10. SENTIVE DETECTORS module. 50 is a personal computer for receiving the motion capture data detected from the PSD module 30 by USB communication and displaying the 3D motion detected position.

2 is a detailed block diagram of a motion detection apparatus for detecting a high speed motion according to an embodiment of the present invention.

21, 22, and 23 are first to third light emitting devices installed on body parts of the gamer 10, for example, hands, heads, shoulders, and the like, and emit light at different wavelengths. 41 and 42 are lenses for condensing the light emitted from the first to third light emitting elements 21, 22, and 23. 31 and 32 are the first and second PSD (POSITION SENTIVE DETECTORS) for detecting the motion of the gamer 10 by detecting the positions of the light emitting elements 21, 22, and 23 by receiving the light collected from the lenses 41 and 42. 33 is an A / D converter for converting motion data detected from the first and second PSDs 31 and 32 into digital data. 34 is a USB interface for interfacing the digitally detected motion detection data from the A / D converter 33 to be transmitted by USB communication, and 50 is a motion capture data detected by the USB interface 34 and USB communication. A personal computer that receives and detects a three-dimensional motion and displays its position.

1 to 2 will be described in detail the operation of the preferred embodiment of the present invention.

First, the gamers 10 attach a plurality of light emitting elements 21, 22, and 23 to the positions where movements of each part of the body, for example, head, hands, shoulders, chest, and legs, occur before starting the game. Install the PSD module 30 on the top of the monitor of the PC 50 to connect the PC 50 with a cable and operate the PC 50 to execute a program using the motion detection data.

Then, when the gamer 10 moves according to a rule set in advance in the program, the positions of the plurality of light emitting elements attached to the body of the gamer 10 are moved according to the gamer's motion. The first to third light emitting devices 21, 22, and 23 are moved. The first to third light emitting devices 21, 22, and 23 may be implemented by, for example, LEDs, but may also be implemented by other lamps. Then, the light emitted from the first to third light emitting devices 21, 22, and 23 at different frequencies is collected by the lenses 41 and 42, and applied to the first and second PSDs 31 and 32, respectively. . In this case, the first and second PSDs 31 and 32 sequentially receive light of different frequencies collected from the lenses 41 and 42 and detect the 3D position data of the moved position. If it is assumed that the leg first light emitting device 21, which is a part of the body of the gamer 10, the second light emitting device 22 is installed in the head, and the third light emitting device 23 is installed in the shoulder, The first and second PSDs 31 and 1 sequentially receive light having different frequencies from the first to third light emitting devices 21, 22, and 23, and are moved according to types of light having the frequencies. By detecting the movement of the shoulders and hands, the movements of the head, shoulders and legs can be detected. When the light is incident on the light emitting device, the PSD is converted into photoelectrons, and a weak current flows through both terminals. If a constant resistor exists at the distance from the light incident position to both terminals, the current flowing at both ends is It is measured in inverse proportion. Therefore, by measuring the positive current value, the position of the light beam can be obtained from the ratio value of the sum and difference of the two currents. In addition, the PSD is configured to obtain only a linear equation in which the light emitting device exists, but a three-dimensional position can be obtained from the intersection of the linear equations obtained from the two first and second PSDs 31 and 32. If you want to find the position of several points attached to the position to know the light emitting element and the light of different frequencies can emit the position of a plurality of points. In this case, in order to detect the positions of the plurality of points, the first to third light emitting devices 21, 22, and 23 are turned on, and light having different frequencies is generated from the first to third light emitting devices 21, 22, and 23. When the light of different frequencies is sequentially measured, the position shift of the first to third light emitting devices 21, 22, and 23 is detected. In this way, the motion detection data in which the positions of the first to third light emitting elements 21, 22, and 23 are measured are converted into digital signals by the A / D converter 33 and output. The motion detection data digitally converted from the A / D converter 33 is transferred to the PC 50 through the USB interface 34. The PC 50 receives the motion detection data through the USB interface 34 to obtain a three-dimensional position from the intersection point of the linear equation and displays it on the monitor.

As described above, the present invention detects three-dimensional motion information by using a plurality of light emitting devices having different wavelengths from the PSD, and transmits motion detection information of high speed motion in real time through a network, and at the same time enables motion capture at low cost. There is an advantage.

Claims (2)

In the motion detection device of high speed operation, A plurality of light emitting elements installed at different positions and emitting light at different frequencies, respectively; A position detector for detecting motion by receiving light emitted at different wavelengths from the plurality of light emitting devices; A plurality of lenses disposed between the plurality of light emitting elements and the motion detector to condense the light emitted at wavelengths from each of the plurality of light emitting elements; And a personal computer that receives the motion capture data detected from the motion detector, detects a three-dimensional motion, and displays its position. The method of claim 1, wherein the position detector, First and second PSDs for detecting motion of the light emitting device by receiving light having different wavelengths collected from the plurality of lenses; An A / D converter for converting motion data detected from the first and second PSD into digital data; And a USB interface for interfacing the digitally detected motion detection data from the A / D converter to be transmitted by USB communication.