Real Time Displacement Measurement of Lattice Pattern Using High Speed Camera

2013 ◽  
Author(s):  
Yasushi Niitsu ◽  
Takaaki Iizuka ◽  
Osamu Furuya
Keyword(s):  
Real Time ◽  
High Speed ◽  
Displacement Measurement ◽  
High Speed Camera ◽  
Lattice Pattern

High-Speed Camera Particle Tracking and Force Measurement, with Real-Time Haptic Feedback

2009 ◽  
Author(s):  
Richard Bowman ◽  
Cécile Pacoret ◽  
D. Sinan Haliyo ◽  
Stéphane Régnier ◽  
Graham Gibson ◽  
...  
Keyword(s):  
Real Time ◽  
Particle Tracking ◽  
High Speed ◽  
Haptic Feedback ◽  
Force Measurement ◽  
High Speed Camera

scholarly journals An FPGA Platform for Next-Generation Grating Encoders

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2266
Author(s):  
Yaodong Han ◽  
Kai Ni ◽  
Xinghui Li ◽  
Guanhao Wu ◽  
Kangning Yu ◽  
...  
Keyword(s):  
Data Processing ◽  
Real Time ◽  
High Speed ◽  
Displacement Measurement ◽  
Time Data ◽  
Order Error ◽  
Real Time Data ◽  
Calculation System ◽  
Real Time Data Processing ◽  
Processing Platform

Among various nanometer-level displacement measurement methods, grating interferometry-based linear encoders are widely used due to their high robustness, relatively low cost, and compactness. One trend of grating encoders is multi-axis measurement capability for simultaneous precision positioning and small order error motion measurement. However, due to both lack of suitable hardware data processing platform and of a real-time displacement calculation system, meeting the requirements of real-time data processing while maintaining the nanometer order resolutions on all these axes is a challenge. To solve above-mentioned problem, in this paper we introduce a design and experimental validation of a field programmable gate array (FPGA)-cored real-time data processing platform for grating encoders. This platform includes the following functions. First, a front-end photodetector and I/V conversion analog circuit are used to realize basic analog signal filtering, while an eight-channel parallel, 16-bit precision, 200 kSPS maximum acquisition rate Analog-to-digital (ADC) is used to obtain digital signals that are easy to process. Then, an FPGA-based digital signal processing platform is implemented, which can calculate the displacement values corresponding to the phase subdivision signals in parallel and in real time at high speed. Finally, the displacement result is transferred by USB2.0 to the PC in real time through an Universal Asynchronous Receiver/Transmitter (UART) serial port to form a complete real-time displacement calculation system. The experimental results show that the system achieves real-time data processing and displacement result display while meeting the high accuracy of traditional offline data solution methods, which demonstrates the industrial potential and practicality of our absolute two-dimensional grating scale displacement measurement system.

scholarly journals Affordable Remote Monitoring of Health Status using Facial Image Processing

2019 ◽  
Vol 8 (12) ◽  
pp. 2518-2521
Keyword(s):  
Image Processing ◽  
Health Status ◽  
Real Time ◽  
Monitoring System ◽  
Remote Monitoring ◽  
High Speed ◽  
Vital Signs ◽  
Close Monitoring ◽  
High Speed Camera ◽  
Remote Monitoring System

This paper presents a real-time monitoring system with a novel approach to assess the human health status without the need for using a body sensor. The project mainly targets improving the quality of life for those living independently but still require close monitoring. Skin fluctuation of the human face is monitored real time with a high-speed camera to determine vital signs including the heart rate and blood pressure. A few image processing algorithms have been utilized to determine the image fluctuations and extract the related features and acquire vital signals. An algorithm assesses and evaluates the risks involved in irregular behaviors and takes follow up actions where required. The application has been implemented on two platforms and interfaced with a high-speed camera to evaluate the performance of the remote monitoring system in indoor situations.

High-speed camera with internal real-time image processing

2005 ◽  
Author(s):  
M. Paindavoine ◽  
R. Mosqueron ◽  
J. Dubois ◽  
C. Clerc ◽  
J. C. Grapin ◽  
...  
Keyword(s):  
Image Processing ◽  
Real Time ◽  
High Speed ◽  
High Speed Camera ◽  
Real Time Image Processing ◽  
Real Time Image ◽  
Time Image

scholarly journals Real-Time Monitoring of Dynamic Stress Concentration by Mechanoluminescent Sensing Film

2008 ◽  
Vol 13-14 ◽  
pp. 247-250 ◽  
Author(s):  
C. Li ◽  
Chao Nan Xu ◽  
Yusuke Imai ◽  
Wen Xue Wang ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Stress Concentration ◽  
Real Time ◽  
High Speed ◽  
Dynamic Stress ◽  
Dynamic Stress Concentration ◽  
Uniaxial Tensile ◽  
Uniaxial Tensile Test ◽  
High Speed Camera ◽  
Lüders Band

In this paper, we demonstrate that a dynamic stress concentration around Lüders band can be directly displayed using mechanoluminescence (ML) sensing film of SrAl2O4:Eu (SAO) coated on the surface of metal. Uniaxial tensile test of an aluminum alloy (2.5% Mg) plate coated with the SAO sensing film was performed and the ML images were recorded using a high-speed camera. Captured ML images confirmed the formation and propagation of Lüders band clearly in real time.

High-speed camera with internal real-time image compression

2005 ◽  
Author(s):  
Michel Paindavoine ◽  
Romulad Mosqueron ◽  
Julien Dubois ◽  
Cedric Clerc ◽  
Jean-CLaude Grapin ◽  
...  
Keyword(s):  
Image Compression ◽  
Real Time ◽  
High Speed ◽  
High Speed Camera ◽  
Real Time Image ◽  
Time Image
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