scholarly journals Pixelwise Phase Unwrapping Based on Ordered Periods Phase Shift

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 377
Author(s):  
Satoshi Tabata ◽  
Michika Maruyama ◽  
Yoshihiro Watanabe ◽  
Masatoshi Ishikawa
Keyword(s):  
High Resolution ◽  
Phase Shift ◽  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Moving Objects ◽  
Global Illumination ◽  
Accurate Method ◽  
Phase Unwrapping ◽  
Order Structure

The existing phase-shift methods are effective in achieving high-speed, high-precision, high-resolution, real-time shape measurement of moving objects; however, a phase-unwrapping method that can handle the motion of target objects in a real environment and is robust against global illumination as well is yet to be established. Accordingly, a robust and highly accurate method for determining the absolute phase, using a minimum of three steps, is proposed in this study. In this proposed method, an order structure that rearranges the projection pattern for each period of the sine wave is introduced, so that solving the phase unwrapping problem comes down to calculating the pattern order. Using simulation experiments, it has been confirmed that the proposed method can be used in high-speed, high-precision, high-resolution, three-dimensional shape measurements even in situations with high-speed moving objects and presence of global illumination. In this study, an experimental measurement system was configured with a high-speed camera and projector, and real-time measurements were performed with a processing time of 1.05 ms and a throughput of 500 fps.

Electrical Probing and Surface Imaging of Deep Sub-Micron Integrated Circuits

1999 ◽  
Author(s):  
Kenneth Krieg ◽  
Richard Qi ◽  
Douglas Thomson ◽  
Greg Bridges
Keyword(s):  
High Resolution ◽  
Integrated Circuits ◽  
Real Time ◽  
High Speed ◽  
Time Signal ◽  
Surface Imaging ◽  
Atomic Force ◽  
Submicron Structures ◽  
High Resolution Images ◽  
Capacitive Loading

Abstract A contact probing system for surface imaging and real-time signal measurement of deep sub-micron integrated circuits is discussed. The probe fits on a standard probe-station and utilizes a conductive atomic force microscope tip to rapidly measure the surface topography and acquire real-time highfrequency signals from features as small as 0.18 micron. The micromachined probe structure minimizes parasitic coupling and the probe achieves a bandwidth greater than 3 GHz, with a capacitive loading of less than 120 fF. High-resolution images of submicron structures and waveforms acquired from high-speed devices are presented.

Online Real-Time Detection Scheme Research on Precision of Filter Rod Circumference

2015 ◽  
Vol 731 ◽  
pp. 340-344
Author(s):  
Qian Ru Tian ◽  
Bang Gui He ◽  
Zhi Long Wang
Keyword(s):  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Contour Detection ◽  
Discrete Control ◽  
Compact Structure ◽  
Detection Scheme ◽  
Forming Mechanism ◽  
Precision Measuring ◽  
Real Time Detection

Precision of filter rod circumference is an important performance index of the cigarette manufacturing. The forming mechanism of filter rod, equipment vibration and other interference factors all lead to fluctuations of precision of filter rod circumference which can affect the precision of the cigarette. The existing KDF2/3 filter rod making machine which has the characteristics of compact structure (small space dimension), high speed (300 m/min) and discrete control of precision of filter rod circumference is the core equipment of filter rod production. This paper puts forward four kinds of online real-time detection schemes on precision of filter rod circumference which are Aomeijia’s many groups of detectors scheme, Keyence’s contour detection scheme, high precision measuring diameter instrument detection scheme using multiple sets of KD series meter and the 360 degrees rotating survey meter. On the basis of extensive analysis and experimental validation, Aomeijia’s four-way diameter measuring instrument scheme is optimal. The scheme applies laser to non-contact high speed scan on key radial diameter size of filter rod which achieves 0.001mm high precision detection.

Development of High Speed High Resolution Camera for Fuel Injection Process by Using Phase Shift Photographing

2019 ◽  
Vol 2019.25 (0) ◽  
pp. 18B09
Author(s):  
FENG Yuanrun ◽  
Hideaki TAKAHASHI ◽  
Kazuyuki KOJIMA ◽  
Hiroyuki SATO
Keyword(s):  
High Resolution ◽  
Phase Shift ◽  
High Speed ◽  
Fuel Injection ◽  
Injection Process

High-speed and high-precision torsion sensor based on polarization-induced microwave photonic phase shift measurement

2019 ◽  
Vol 44 (14) ◽  
pp. 3462
Author(s):  
Bin Wang ◽  
Weifeng Zhang ◽  
Xinyu Fan ◽  
Jianping Yao
Keyword(s):  
Phase Shift ◽  
High Precision ◽  
High Speed ◽  
Shift Measurement ◽  
Microwave Photonic

A Design of Position Terminal Based on BDS

2014 ◽  
Vol 635-637 ◽  
pp. 1128-1131
Author(s):  
Xing Hong Kuang ◽  
Zhe Yi Yao ◽  
Shi Ming Wang
Keyword(s):  
Data Collection ◽  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Large Scale ◽  
High Efficiency ◽  
Satellite Navigation ◽  
Navigation Systems ◽  
Time Data ◽  
High Precision Measurement

With the development of economy, the global satellite navigation system with its high speed, high efficiency, high precision measurement and positioning a series of significant advantages, favored by various industry data collection and monitoring of personnel resources , the advent of satellite navigation systems to solve a large-scale, rapid and high-precision global positioning problem. Its scope of application has penetrated to the various departments of the national economic and social development in various fields and industries. To be able to monitor the progressive realization of automated data collection and transmission, the urgent need to adopt advanced positioning technology to build real-time location monitoring system PC Based Development Background navigation receiver , an overview of the inter Beidou BD-126 systems and microcontrollers can be serially the basic principle of mouth communication describes the communication protocol Compass BD-126 positioning module and the next crew between the microcontroller to control development in the use of PC positioning system for a detailed description , including the BDS Beidou satellite navigation module and microcontroller serial data communications, microprocessor controlled real-time data display , and so on

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