High-precision phase shift of optic fiber sensor applied to laser dynamic-fixed distance measurement

2000 ◽  
Author(s):  
Yongjun Qi ◽  
Zeying Chi
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
Distance Measurement ◽  
Fiber Sensor ◽  
Optic Fiber ◽  
Fixed Distance ◽  
Precision Phase

The Method for Improving the USBL Positioning System

2010 ◽  
Author(s):  
Yu Min
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
Good Accuracy ◽  
Least Squares Method ◽  
Measuring Error ◽  
Short Baseline ◽  
Precision Phase ◽  
Positioning Algorithm ◽  
Additional Phase Shift ◽  
Additional Phase

This paper addresses a problem of estimating the precision phase-shift between the transducers of an Ultra short baseline (USBL) array. Due to fact that the performance of the traditional USBL system would evidently decline as the position error increases with the range, the paper at first proposed a high-precision positioning algorithm applied to an improved array to overcome this problem. Besides, employing a least-squares method, the additional phase shift between the transducers are also considered to be determined experimentally by rotating the USBL array in an acoustic test tank, which furthermore reduces the phase shift measuring error. Some trials results show that the proposed high-precision algorithm with improved array can be achieved with good accuracy, as well as the alignment phase shift offset.

Integrated optic-fiber sensor based on enclosed EFPI and structural phase-shift for discriminating measurement of temperature, pressure and RI

2020 ◽  
Vol 126 ◽  
pp. 106112 ◽  
Author(s):  
Danqing Yang ◽  
Yinggang Liu ◽  
Yuxi Wang ◽  
Ting Zhang ◽  
Min Shao ◽  
...  
Keyword(s):  
Phase Shift ◽  
Structural Phase ◽  
Fiber Sensor ◽  
Optic Fiber

High-precision Phase-shift Laser Range Finder System Based on Laser Beat-frequency

2014 ◽  
Vol 43 (9) ◽  
pp. 912006 ◽  
Author(s):  
姜成昊 JIANG Cheng-hao ◽  
杨进华 YANG Jin-hua ◽  
张丽娟 ZHANG Li-juan ◽  
王晓坤 WANG Xiao-kun
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
Beat Frequency ◽  
Laser Range Finder ◽  
Range Finder ◽  
Laser Range ◽  
Precision Phase

Optic-fiber sensor for steam quality measurement

2005 ◽  
Author(s):  
Pei Liang ◽  
Jianjun Yu ◽  
Guirong Zu ◽  
Xinjiang Li ◽  
Yang Shen ◽  
...  
Keyword(s):  
Quality Measurement ◽  
Fiber Sensor ◽  
Optic Fiber ◽  
Steam Quality

scholarly journals Dispersive analysis of the Primakoff reaction $$\gamma K \rightarrow K \pi $$

2021 ◽  
Vol 81 (3) ◽  
Author(s):  
Maximilian Dax ◽  
Dominik Stamen ◽  
Bastian Kubis
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
Low Energy ◽  
Wave Phase ◽  
Dispersive Analysis ◽  
Model Independent

AbstractWe provide a dispersion-theoretical representation of the reaction amplitudes $$\gamma K\rightarrow K \pi $$ γ K → K π in all charge channels, based on modern pion–kaon P-wave phase shift input. Crossed-channel singularities are fixed from phenomenology as far as possible. We demonstrate how the subtraction constants can be matched to a low-energy theorem and radiative couplings of the $$K^*(892)$$ K ∗ ( 892 ) resonances, thereby providing a model-independent framework for future analyses of high-precision kaon Primakoff data.

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