An Angle Measurement Method by Using Terrestrial Magnetism Sensors on a Ski Jumper's Motion Monitoring System

2011 ◽  
Author(s):  
Nobuyoshi Sato ◽  
Masaki Oikawa ◽  
Tsuyoshi Takayama ◽  
Yoshitoshi Murata
Keyword(s):  
Monitoring System ◽  
Measurement Method ◽  
Angle Measurement ◽  
Terrestrial Magnetism

scholarly journals An Optical Frequency Domain Angle Measurement Method Based on Second Harmonic Generation

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 670
Author(s):  
Wijayanti Dwi Astuti ◽  
Hiraku Matsukuma ◽  
Masaru Nakao ◽  
Kuangyi Li ◽  
Yuki Shimizu ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Second Harmonic Generation ◽  
Frequency Domain ◽  
Harmonic Generation ◽  
Measurement Method ◽  
Second Harmonic ◽  
Angle Measurement ◽  
Laser Source ◽  
Optical Frequency ◽  
Measurable Range

This paper proposes a new optical angle measurement method in the optical frequency domain based on second harmonic generation with a mode-locked femtosecond laser source by making use of the unique characteristic of the high peak power and wide spectral range of the femtosecond laser pulses. To get a wide measurable range of angle measurement, a theoretical calculation for several nonlinear optical crystals is performed. As a result, LiNbO3 crystal is employed in the proposed method. In the experiment, the validity of the use of a parabolic mirror is also demonstrated, where the chromatic aberration of the focusing beam caused the localization of second harmonic generation in our previous research. Moreover, an experimental demonstration is also carried out for the proposed angle measurement method. The measurable range of 10,000 arc-seconds is achieved.

scholarly journals A radio navigation angle measurement method with entangled microwave signals

AIP Advances ◽  
2018 ◽  
Vol 8 (6) ◽  
pp. 065217 ◽  
Author(s):  
X. Li ◽  
D. W. Wu ◽  
T. L. Wei ◽  
Q. Miao ◽  
H. N. Zhu ◽  
...  
Keyword(s):  
Measurement Method ◽  
Angle Measurement ◽  
Radio Navigation ◽  
Microwave Signals

A high-precision roll angle measurement method

Optik ◽  
2015 ◽  
Vol 126 (24) ◽  
pp. 4837-4840 ◽  
Author(s):  
Zhai Yusheng ◽  
Zhang Zhifeng ◽  
Su Yuling ◽  
Wang Xinjie ◽  
Feng Qibo
Keyword(s):  
High Precision ◽  
Measurement Method ◽  
Angle Measurement ◽  
Roll Angle

Study on Harmonic Analysis and Error Correction in Synchro to Digital Conversion

2011 ◽  
Vol 225-226 ◽  
pp. 334-337 ◽  
Author(s):  
Yan Liu ◽  
Ze Gang Ye
Keyword(s):  
Harmonic Analysis ◽  
Error Correction ◽  
Measurement Method ◽  
Angle Measurement ◽  
Conversion Process ◽  
Matlab Simulation ◽  
Angle Error ◽  
Digital Conversion ◽  
Current Implementation ◽  
Improve Accuracy

The current implementation of the synchro to digital conversion (SDC) can not directly detect harmonic which can cause the problem of low precision angle measurement. To improve accuracy of angle, harmonic interference was analyzed and summarized in the axis-angle to digital conversion process. Through detailed research, a new angle measurement formula is proposed in this paper, this formula can be very good for angle error correction and compensation. In order to meet the practical requirements, a software measurement method based on FFT algorithm of harmonic analysis and error correction is put forward. Matlab simulation shows that the formula and method is effective and feasible.

Research on angle measurement method of monopulse SAR

2015 ◽  
Author(s):  
Zengliang Li Zengliang Li ◽  
Xin Zhao Xin Zhao ◽  
Huadong Zhang Huadong Zhang
Keyword(s):  
Measurement Method ◽  
Angle Measurement

Design and Precision Analysis of Muzzle Angle Measurement System

2011 ◽  
Vol 128-129 ◽  
pp. 1378-1381
Author(s):  
Jian Ping Zhou ◽  
Xiao Yun Wu ◽  
Peng Fei Zhang ◽  
Guo Hua Gu
Keyword(s):  
Light Source ◽  
Measurement System ◽  
Measurement Method ◽  
Angle Measurement ◽  
Measurement Technology ◽  
Optical Range ◽  
Precision Analysis ◽  
Traditional Methods ◽  
Two Dimension ◽  
New System

The traditional muzzle angle measurement method measured by optical range quadrant can’t satisfy the demand. A muzzle angle auto-measurement method based on collimation light source and PSD two-dimension sensors is provided. Adopted by the auto-measurement technology, the precision, efficiency and velocity of measurement are all improved, which solves the problems of traditional methods. The errors and precision of the new system are analyzed. According these analysis and calculation, the precision of this measurement system can gain the measurement ends.

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