• Title/Summary/Keyword: autocalibration

Search Result 6, Processing Time 0.024 seconds

Autocalibration Method of Three-axis Micromachined Accelerometers (3축 MEMS 가속도 센서의 이득 및 오프셋 자동 교정법)

  • Song, Ci-Moo
    • The Transactions of the Korean Institute of Electrical Engineers C
    • /
    • v.55 no.9
    • /
    • pp.456-460
    • /
    • 2006
  • This paper deals with a novel autocalibration method of three-axis micromachined accelerometers applied to a new digital intelligent putter for golfers. This putter can help golfers monitor and analyze their putting posture and therefore modify their putting action to get better score and enjoy their lives through golf. The micromachined accelerometers to get information of the motion are the essential part of the putter to measure the three-axis acceleration as accurately as possible. This paper presents an efficient autocalibration algorithm to find the offset and sensitivity of accelerometers by only using the static measurement data at six different positions. The experimental results on the developed putters show the validity of the proposed algorithm for the new smart putter.

Estimation of Camera Parameters for 3D-Based Synthesis from Uncalibrated Image Sequence (비 교정 영상에서의 영상합성을 위한 카메라 정보 복원에 관한 연구)

  • 오인환;윤용인;최종수
    • The Journal of Korean Institute of Communications and Information Sciences
    • /
    • v.29 no.2C
    • /
    • pp.229-237
    • /
    • 2004
  • In this paper. we propose a new autocalibration algorithm. 3D-based image synthesis is roughly divided into two methods. One is using autocalibration method, and the other is using real 3D data like pattern information. The former is more progressive method. because there is no constraint or information about the scenes. Therefore autocalibration method has very difficult progress dealing with complicate non-lineal equations. Nowadays, constraints of camera intrinsic parameters are used in many researches. Therefore we solve the linear equations instead of complicate non-lineal equations. For example, to fix principal point of camera is a representative method.

BER Analysis of a Quadrature Receiver with an Autocalibration Function (자동보정 기능을 가진 Quadrature 수신기의 BER 해석)

  • Kwon, Soon-Man;Lee, Jong-Moo;Cheon, Jong-Min;Park, Min-Kook;Kim, Jong-Moon
    • Proceedings of the KIEE Conference
    • /
    • 2005.10b
    • /
    • pp.457-459
    • /
    • 2005
  • In this paper the BER consideration of a quadrature receiver that has an autocalibration method is considered. The analysis is based on the derivation of the statistical characteristics of the imbalances in gain and phase between in-phase and quadrature components that may cause severe performance degradation of the receiver. The density. mean and variance functions of the estimates of gain and phase imbalances are discussed. Then it is shown that the estimates are asymptotically minimum variance unbiased with respect to the integration time in sampling. A brief consideration on the BER calculation follows.

  • PDF

Golf Swing Diagnosis Equipment based on MEMS Inertial Sensors (초소형 관성센서를 이용한 골프스윙진단장치)

  • Song, Ci-Moo
    • Proceedings of the KSME Conference
    • /
    • 2008.11a
    • /
    • pp.1761-1766
    • /
    • 2008
  • This paper deals with a novel autocalibration method of three-axis micromachined accelerometers applied to a new golf swing diagnosis equipment for golfers. This diagnosis equipment can help golfers monitor and anlalyze their swing posture and therefore modify their swing action to get better score and enjoy their lives through golf. The micromachined accelerometers to get information of the motion are the essential part of the putting club to measure the three-axis acceleration as accurately as possible. This paper presents an efficient autocalibration algorithm to find the offset and sensitivity of accelerometers by only using the static measurement data at six different positions. The experimetnal results on the developed putters show the validity of the proposed algorithm for the new smart putter.

  • PDF

Autocalibration Method of Three-axis Micromachined Accelerometers (3축 MEMS 가속도 센서의 이득 및 오프셋 자동 교정법)

  • Song Ci-Moo;Lee Jin-Woo
    • Proceedings of the KIPE Conference
    • /
    • 2006.06a
    • /
    • pp.302-304
    • /
    • 2006
  • This paper deals with a novel autocalibration method of three-axis micromachined accelerometers applied to a new intelligent putter for golfers. This putter can help golfers monitor and analyze their putting posture and therefore modify their putting action to get better score and enjoy their lives through golf. The micromachined accelerometers to get information of the motion are the essential part of the putter to measure the three-axis acceleration as accurately as possible. This paper presents autocalibration algorithm to find the offset and sensitivity of accelerometers only by using six different static measurement data. The experimental results shows the validity of the algorithm for the new smart putter.

  • PDF

STATISTICAL ANALYSIS OF AN AUTOCALIBRATION METHOD FOR QUADRATURE RECEIVERS

  • Soonman Kwon;Kim, Seogjoo;Lee, Jongmoo
    • Proceedings of the IEEK Conference
    • /
    • 2000.07a
    • /
    • pp.517-520
    • /
    • 2000
  • This paper deals with the statistical analysis of an autocalibration procedure for the gain and phase imbalances between the in-phase (I) and quadrature (Q) components in quadrature receivers. In real implementation, the imbalances of the gain and phase exist and degrade the performance of the receiver. In this paper we investigate the statistical characteristic of the estimates in an on-line imbalance estimation method for the receiver under the assumption of an additive white Gaussian noise environment.

  • PDF