Space recognition method and apparatus of input device

• US 20070299626A1
• Filed: 06/13/2007
• Published: 12/27/2007
• Est. Priority Date: 06/21/2006
• Status: Abandoned Application

• Current Assignee: Microtech Systems Incorporated (Financière Cyclope SAS), Microinfinity, Inc.
• Original Assignee: Microtech Systems Incorporated (Financière Cyclope SAS), Microinfinity, Inc.
• Inventors: Song, Jinwoo, Yim, Sangsoo
• Application Number:
  US11/808,815
• Publication Number:
  US 20070299626A1
• Time in Patent Office: Days
• US Class Current: 702/151
• CPC Class Codes: G01C 21/183 Compensation of inertial measurements, e.g. for temperature effects
• CPC Class Codes: G06F 3/0346 with detection of the device orientation or free movement in a 3D space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors
• CPC Class Codes: G06F 3/038 Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry

Abstract

Provided are method and apparatus for recognizing space according to the movement of an input device.

A method of recognizing space according to the movement of an input device, the method comprising: measuring angular velocity data using an angular velocity sensor; measuring acceleration data using an accelerometer; estimating a bias of the angular velocity sensor using the acceleration data; calculating Euler angles between a reference navigational frame and a body frame using the angular velocity data and the acceleration data; and identifying position information of the input device according to the movement of the input device by using the calculated Euler angles.

Claims

1. A method of recognizing space according to the movement of an input device, the method comprising:

measuring angular velocity data using an angular velocity sensor;

measuring acceleration data using an accelerometer;

estimating a bias of the angular velocity sensor using the acceleration data;

calculating Euler angles between a reference navigational frame and a body frame using the angular velocity data and the acceleration data; and

identifying position information of the input device according to the movement of the input device by using the calculated Euler angles.

2. The method of claim 1, wherein the estimating of the bias of the angular velocity sensor is performed using a Kalman filtering technique.

3. A computer-readable recording medium on which a program for executing the method of claim 1 or 2 in a computer is recorded.

4. An apparatus for recognizing space according to the movement of an input device, the apparatus comprising:

a transmitter identifying position information of the input device according to the movement of the input device and transmitting the identified position information; and

a receiver receiving the position information from the transmitter,

wherein the transmitter comprises;

an inertial measurement module measuring angular velocity data and acceleration data as the input device moves;

a first main control module calculating Euler angles between a reference navigational frame and a body frame using the angular velocity data and the acceleration data, generating position information of the input device using the calculated Euler angles, and estimating the a bias of the angular velocity sensor using the angular velocity data; and

a first transmission/reception module transmitting the position information to the receiver using a wireless communication method and receiving data from the receiver, and

the receiver comprises;

a second transmission/reception module receiving the position information from the transmitter and transmitting necessary data to the transmitter;

a second main control module processing the received position information; and

a communication module communicating with a product linked thereto in order to transmit the processed position information to the linked product.

5. The apparatus of claim 4, wherein the inertial measurement module comprises:

an angular velocity sensor measuring the angular velocity data; and

an accelerometer measuring the acceleration data.

6. The apparatus of claim 4, wherein the first main control module estimates the bias of the angular velocity sensor using a Kalman filtering technique.

7. The apparatus of claim 4, wherein the input device comprises a presenter, a mouse or a remote control.