Motion Analysis of Ball Grinder with Dual-Rotating Plates Lapping Mode

2009 ◽  
Vol 416 ◽  
pp. 295-299
Author(s):  
Yang Fu Jin ◽  
Xun Lv ◽  
Xiao Dong Hu ◽  
Wei Li
Keyword(s):  
Motion Analysis ◽  
Spin Axis ◽  
Motion Model ◽  
Spin Speed ◽  
Revolution Speed ◽  
New Type ◽  
Motion Parameters ◽  
Rotating Plates ◽  
Ball Motion

Dual-rotating plates lapping method is a new type of ball machining technology, in which the spin axis angle of the ball could wiggle up to 180°. An investigation was made to verify the motion model of the dual-rotating plates lapping. The ball motion parameters, such as revolution speed, spin speed and spin axis angle were detected experimentally. The results show that the calculated values and the measured ones of the ball motion parameters are almost identical. The motion model of the dual-rotating plates lapping method is thus verified valid.

scholarly journals Global Motion Model for Stereovision-Based Motion Analysis

2006 ◽  
Vol 2006 (1) ◽  
Author(s):  
Jia Wang ◽  
Zhencheng Hu ◽  
Keiichi Uchimura ◽  
Hanqing Lu
Keyword(s):  
Motion Analysis ◽  
Motion Model ◽  
Global Motion

Design of Deployment Mechanim of Steel Ball and Surface Defects Recognition

2013 ◽  
Vol 274 ◽  
pp. 245-248 ◽  
Author(s):  
Yan Ling Zhao ◽  
Wan Bo Che ◽  
Kai Zhou ◽  
Jia Ping Xuan
Keyword(s):  
Mathematical Model ◽  
Image Processing ◽  
Motion Analysis ◽  
Surface Defects ◽  
Steel Ball ◽  
Simulation Based ◽  
Ball Surface ◽  
Low Efficiency ◽  
The Mathematical Model ◽  
Ball Motion

At present, the steel ball surface defects are usually detected by manual work, but it has low efficiency and low reliability. For the current situation, in this paper, we design the steel ball deployment mechanism based on image processing technology, establish the mathematical model of the shooting point trajectory and determine the amount and location of the shooting points by the steel ball motion analysis. By the simulation based on Mathematica and Java, verify the effectiveness of the steel ball deployment mechanism in steel ball unfolding and defects recognition. Thus, the steel ball surface can be completely detected.

Measurement and Validation of Exercise-Induced Fatigue Through Inertial Motion Analysis

2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Sina Ameli ◽  
Fazel Naghdy ◽  
David Stirling ◽  
Golshah Naghdy ◽  
Morteza Aghmesheh ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Stair Climbing ◽  
Physical Work ◽  
Tissue Oxygen Saturation ◽  
Inertial Motion ◽  
Fatigue Protocol ◽  
Before And After ◽  
Motion Parameters ◽  
Exercise Induced ◽  
Joint Motions

Exercise-induced fatigue evolves from the initiation of physical work. Nonetheless, the development of an objective method for detecting fatigue based on variation in ambulatory motion parameters measured during exercise is yet to be explored. In this study, the ambulatory motion parameters consisting of kinematic parameters of 23 body segments in addition to muscle tissue oxygen saturation (SmO2), heart rate, and vertical work of eight healthy male subjects during stair climbing tests (SCT) were measured before and after a fatigue protocol utilizing Wingate cycling test. The impacts of fatigue on ambulatory motion and postural behaviors were analyzed using an unsupervised machine learning method classifying angular joint motions. The average of total distance traveled by subjects and the overall body postural behavior showed about 25% decline and 90% variation after fatigue protocol, respectively. Also, higher relative desaturation in SCT1 −64.0 (1.1) compared SCT2 −54.8 (1.1) was measured. Measurements of differences in motion postural states and metabolic indexes after exercises-induced fatigue proved a strong correlation which validates the advantages of inertial motion analysis method for fatigue assessment.

An Efficient Sport Video Segmentation System

2011 ◽  
Vol 467-469 ◽  
pp. 2042-2047
Author(s):  
Xin Bo Zhao ◽  
Xiao Chun Zou ◽  
Zhong Ma
Keyword(s):  
Video Segmentation ◽  
Model Parameters ◽  
Motion Model ◽  
Test Results ◽  
And Topology ◽  
Sport Video ◽  
Final Output ◽  
Feature Based ◽  
Error Accumulation ◽  
Motion Parameters

Digital sport video segmentation is an active area of research. And such an efficient sport video segmentation system is necessary. The system employs the feature-based motion estimator to estimate the video motion model parameters. Thus, we can use the result to compose the panorama. Project frames with motion parameters, the corresponding frames were connected and then stitched into a panoramic image according to infer the frames on a 2D manifold. For accurate alignment, we iterate between the motion estimator and topology determination to optimized parameters. Accuracy panorama composition is implemented to redress the error accumulation and achieve the pixel combination. After that, for the purpose of removing the foreground objects, we use the panorama estimation process. At last, we determine the sportsman segmentation masks that are the final output of the segmentation system. The test results showed that the proposed system is efficient.

scholarly journals Effect of semen extenders on sperm motion of in vitro stored muscovy drake spermatozoa

2011 ◽  
Vol 27 (3) ◽  
pp. 733-740
Author(s):  
V. Gerzilov ◽  
P. Rashev ◽  
A. Bochukov ◽  
P. Bonchev
Keyword(s):  
Motion Analysis ◽  
Computer Assisted ◽  
Sperm Velocity ◽  
In Vitro Storage ◽  
Motion Parameters ◽  
Motion Characteristics ◽  
Sperm Motion

A study for the influence of semen extenders IMV-buffer, HIA- 1 and AU on sperm motion characteristics of Muscovy drake spermatozoa was carried out. The semen from each male (n=6) was divided into three equal parts and diluted in ratio 1:3 (semen:extender) with the IMV-buffer, HIA-1 and AU respectively, and then was stored at temperature 0-4C? for 6 hours. Sperm motion parameters - velocity of spermatozoa (rapid, medium, slow and statistic), VCL, VSL, VAP, LIN, STR, WOB were measured using a Sperm Class Analizer (Micropticum, Spain). Computer-assisted sperm motion analysis indicated that Muscovy spermatozoa preserved a rapid and medium sperm velocity after 6 hours in vitro storage in three examination extenders. The total VCL, VSL and VAP of spermatozoa in the semen diluted with AU extender were 110.47?7.44 ?m/s, 29.42?2.02 ?m/s and 57.39?3.73 ?m/s, in the semen diluted with IMV-buffer were 94.93?11.10 ?m/s, 27.57?2.45 ?m/s and 51.35?4.98 ?m/s, and in the semen diluted with HIA-1 were 68.48?12.74 ?m/s, 20.08?4.18 ?m/s and 37.75?7.65 ?m/s, as the differences were significant between AU and HIA-1 - (P<0.05). About LIN, STR, WOB there were no significant differences for the influence of the extenders.

Kinematic Acquisition of Geometric Constraints for Task Centered Mechanism Design

2010 ◽  
Author(s):  
Jun Wu ◽  
Q. J. Ge ◽  
Hai-Jun Su ◽  
Feng Gao
Keyword(s):  
Mechanism Design ◽  
Motion Analysis ◽  
Geometric Constraints ◽  
Planar Motion ◽  
Dimensional Synthesis ◽  
Constrained Motion ◽  
Analysis Problem ◽  
Geometric Means ◽  
New Type ◽  
Mechanical Linkage

A motion task can be given in various ways. It may be defined parametrically or discretely in terms of an ordered sequence of displacements or in geometric means. This paper studies a new type of motion analysis problem in planar kinematics that seeks to acquire geometric constraints associated with a planar motion task which is given either parametrically or discretely. The resulting geometric constraints can be used directly for type as well as dimensional synthesis of a physical device such as mechanical linkage that generates the constrained motion task. Methods for kinematic acquisition of geometric constraints bridge the gap between type and dimensional synthesis and provide the foundation for task centered mechanism design.

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