Researching a Online Method of Measuring Three-Dimensional Deformation for Large Overhead Crossbeam

2012 ◽  
Vol 522 ◽  
pp. 272-277
Author(s):  
Wei Han ◽  
Li Ming Wu ◽  
Yao Hua Deng ◽  
He Yun Zhang
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Measuring Method ◽  
Wavelet Denoising ◽  
Experimental Results ◽  
Cnc Machining ◽  
Measurement Information ◽  
Online Measurement ◽  
Acceleration Sensor ◽  
Equidistant Points

Aiming at the difficulty of online measurement for three-dimensional deformation of large overhead crossbeam in gantry CNC machining centre, this paper proposes a measuring method based on multi-points attitude of crossbeam-body. Real-time measuring the attitudes of some equidistant points on crossbeam-body, dealing with the measurement information by adopt shockproof filtering, wavelet denoising and smoothing. Then infer the formulas to calculate deformation of each point along different directions ofx-axis,y-axis,z-axis. The experiment uses triaxial acceleration sensor modules to measure crossbeam attitude. Experimental results show that the minimum deformational angle can be measured low to 0.06°. And if the spacing between sensor modules has mm level accuracy, the precision of calculation about deformation can reach up to 10-3mm level. In addition, this method is strongly suitable for on-site environment, and it can lay a foundation for further researching about prediction and compensation in the CNC processing.

Design of Underground Displacement Monitoring Circuit Based on STC89C58

2014 ◽  
Vol 602-605 ◽  
pp. 1916-1919
Author(s):  
Ke Gang Hu ◽  
Yi Lian Zhou ◽  
Qing Li
Keyword(s):  
System Design ◽  
Real Time ◽  
Humidity Sensor ◽  
Experimental Results ◽  
Stable Operation ◽  
Displacement Monitoring ◽  
Acceleration Sensor ◽  
The Core ◽  
Hardware System ◽  
Working Principle

Using STC89C58 MCU as the core, through the acceleration sensor and a humidity sensor for the monitoring the displacement of underground conditions, to simply realize real-time monitoring function of the displacement of underground. Introduces the working principle and software/hardware system design. The experimental results show that, the system has stable operation, achieved the expected goals.

Real-Time Soft Shadow Generating in Three-Dimensional Scene

2010 ◽  
Vol 34-35 ◽  
pp. 217-221
Author(s):  
Lei Xiao ◽  
Cheng Liu ◽  
Xi Long Qu
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Experimental Results ◽  
Complex Scene ◽  
The Third ◽  
Cast Shadow ◽  
Shadow Mapping ◽  
Soft Shadow ◽  
Shadow Map ◽  
Third Dimension

For the sake of improving the third dimension of 3D scenes, we analyze the existent real-time shadow generating algorithms, and improve the Chan’s smoothie soft shadow algorithm, make it based on shadow map, and treat with both the inner and outer penumbra. It not only effectively resolves the problems such as some algorithms can not cast shadow on itself and some are too complex, it also solves the aliasing problems of shadow mapping, and it meet the requirements of real-time in more complex scene. At last, the algorithm is emulated with DirectX, and the experimental results show the feasibility of the algorithm.

scholarly journals Real-time profilometry by bicolor grating video projection

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0259569
Author(s):  
Yujiao Zhang ◽  
Yiping Cao ◽  
Haitao Wu ◽  
Haihua An ◽  
Xiuzhang Huang
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Measuring Method ◽  
3D Measurement ◽  
Cmos Camera ◽  
Sensitivity Ratio ◽  
Pattern Sequence ◽  
Dc Component ◽  
Time Accuracy ◽  
Video Projection

A novel real-time 2+1 three-dimensional(3D) measuring method based on bicolor grating video projection is proposed. Firstly, only two frames of bicolor gratings, in which the red channels are two sinusoidal fringes with a shifting phase of π/2 and the blue channels are the same background light equivalent to the DC component of the two sinusoidal fringes are encoded and arranged alternatively to synthesize into a repetitive bicolor grating video, While this video is projected onto the measured object, the real-time bicolor deformed pattern video can be recorded by using a color CMOS camera, and the bicolor deformed pattern sequence at different moments can be extracted by computer processing, so that the 2+1 algorithm can be used to accomplish real-time 3D measurement of moving object. Before measuring, we used the same method to design two sinusoidal fringes with a difference of π in their red channels, respectively, to calibrate the sensitivity ratio between the red and blue channels of the CMOS camera, which can effectively eliminate the chromaticity imbalance between R and B channels and reduce the color crosstalk. Experimental results and analysis confirm the feasibility and effectiveness of the proposed method. Because the proposed method needs a repetitive bicolor grating video synthesized with only two-frame bicolor gratings to be projected, the 3D measurement acquisition speed and real-time accuracy will be improved compared with the traditional 2+1 3D measuring method.

Evaluation of the mitral valve by transthoracic real-time three-dimensional echocardiography

2010 ◽  
Vol 151 (21) ◽  
pp. 854-863 ◽  
Author(s):  
Attila Nemes ◽  
Marcel L. Geleijnse ◽  
Osama I. I. Soliman ◽  
Wim B. Vletter ◽  
Jackie S. McGhie ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Real Time ◽  
Three Dimensional ◽  
Dimensional Echocardiography ◽  
Three Dimensional Echocardiography

Jelenleg az echokardiográfia a legszéleskörűbben alkalmazott rutin noninvazív diagnosztikus eljárás, amelynek segítségével a mitralis billentyű morfológiája és funkciója jellemezhető. Ennek az összefoglaló jellegű közleménynek a célja az egyik legújabb echokardiográfiás fejlesztés, a transthoracalis real-time háromdimenziós echokardiográfia szerepének bemutatása a mitralis billentyű vizsgálatában.

Online Measurement of Glucose Consumption from HepG2 Cells Using an Integrated Bioreactor and Enzymatic Assay

2018 ◽  
Author(s):  
Anna Adams ◽  
Radha Krishna Murthy Bulusu ◽  
Nikita Mukhitov ◽  
Jose Mendoza-Cortes ◽  
Michael Roper
Keyword(s):  
Real Time ◽  
Glucose Concentration ◽  
Hepg2 Cells ◽  
Glucose Consumption ◽  
Microfluidic System ◽  
Structure And Function ◽  
Online Measurement ◽  
Fluorescent Assay ◽  
And Function ◽  
Integrated Bioreactor

In this work, we developed a microfluidic bioreactor for optimizing growth and maintaining structure and function of HepG2, and when desired, the device could be removed and the extracellular output from the bioreactor combined with enzymatic glucose reagents into a droplet-based microfluidic system. The intensity of the resulting fluorescent assay product in the droplets was measured, and was directly correlated to glucose concentration, allowing the effect of insulin on glucose consumption in the HepG2 cells to be observed and quantified online and in near real-time.

Online Measurement of Glucose Consumption from HepG2 Cells Using an Integrated Bioreactor and Enzymatic Assay

2018 ◽  
Author(s):  
Anna Adams ◽  
Radha Krishna Murthy Bulusu ◽  
Nikita Mukhitov ◽  
Jose Mendoza-Cortes ◽  
Michael Roper
Keyword(s):  
Real Time ◽  
Glucose Concentration ◽  
Hepg2 Cells ◽  
Glucose Consumption ◽  
Microfluidic System ◽  
Structure And Function ◽  
Online Measurement ◽  
Fluorescent Assay ◽  
And Function ◽  
Integrated Bioreactor

In this work, we developed a microfluidic bioreactor for optimizing growth and maintaining structure and function of HepG2, and when desired, the device could be removed and the extracellular output from the bioreactor combined with enzymatic glucose reagents into a droplet-based microfluidic system. The intensity of the resulting fluorescent assay product in the droplets was measured, and was directly correlated to glucose concentration, allowing the effect of insulin on glucose consumption in the HepG2 cells to be observed and quantified online and in near real-time.

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