Versatility In High Speed Motion Analysis With The Spin Physics SP2000 Video System

1985 ◽  
Author(s):  
John Rendell
Keyword(s):  
Motion Analysis ◽  
High Speed ◽  
Spin Physics ◽  
Video System

Limb and thoracolumbosacral kinematics over an upright and parallel spread fence

2019 ◽  
Vol 15 (1) ◽  
pp. 55-67
Author(s):  
V.A. Walker ◽  
S.J. Dyson ◽  
C.A. Tranquille ◽  
J.B. Tacey ◽  
R.C. Murray
Keyword(s):  
Motion Analysis ◽  
High Speed ◽  
Great Variability ◽  
Head Neck

Jumping mechanics have been investigated at take-off, flight and landing, mainly in reference to the limbs with limited evaluation of the thoracolumbosacral region. The objectives of this study were to investigate head, neck, thoracolumbosacral and limb angles in a group of experienced showjumping horses (competing at 1.20-1.60 m) over an upright and parallel spread fence. Ten horses in active showjumping training were recruited (mean 8 years old). High-speed videography (240 Hz) was used to determine thoracolumbosacral kinematic variables of the approach and take-off. No significant differences between the upright and parallel spread fences were observed for any of the variables measured. Individual horse review showed that neck-trunk, thoracolumbar, lumbosacral, coxofemoral angles, take-off distance and speed patterns at take-off were consistent among horses and also repeatable between fence types. Head-neck, stifle and tarsal angles had great variability among horses. The main limitation of this study was that only 2D motion analysis was carried out. In conclusion, analysis of individual horse patterns showed that head, neck, back and limb angles were repeatable over submaximal upright and spread fences in ten horses. Some angles were consistent among horses, but others had individual horse variation.

Reproducibility and Accuracy of Angle Measurements Obtained Under Static Conditions with the Motion Analysis™ Video System

1992 ◽  
Vol 72 (4) ◽  
pp. 300-305 ◽  
Author(s):  
Darl W Vander Linden ◽  
Shirley J Carlson ◽  
Robin L Hubbard
Keyword(s):  
Motion Analysis ◽  
Video System ◽  
Angle Measurements ◽  
Static Conditions

scholarly journals Dynamics of Bubbles Rising in Finite and Infinite Media

2003 ◽  
Author(s):  
Charles C. Maneri ◽  
Peter F. Vassallo
Keyword(s):  
High Speed ◽  
Velocity Model ◽  
System Size ◽  
Published Data ◽  
Rise Velocity ◽  
Velocity Measurements ◽  
Video System ◽  
Bubble Sizes ◽  
Quiescent Liquid ◽  
Infinite Media

The dynamic behavior of single bubbles rising in quiescent liquid Suva (R134a) in a duct has been examined through the use of a high speed video system. Size, shape and velocity measurements obtained with the video system reveal a wide variety of characteristics for the bubbles as they rise in both finite and infinite media. This data, coupled with previously published data for other working fluids, has been used to assess and extend a rise velocity model given by Fan and Tsuchiya. As a result of this assessment, a new rise velocity model has been developed which maintains the physically consistent characteristics of the surface tension in the distorted bubbly regime. In addition, the model is unique in that it covers the entire range of bubble sizes contained in the spherical, distorted and planar slug regimes.

Validation of High Speed Motion Analysis System to Measure Maximal Speed

2010 ◽  
Vol 42 ◽  
pp. 686
Author(s):  
Nidhi Gupta ◽  
Govindasamy Balasekaran ◽  
Visvasuresh Victor Govindaswamy
Keyword(s):  
Motion Analysis ◽  
High Speed ◽  
Motion Analysis System ◽  
Maximal Speed ◽  
Analysis System

Instrumented Measurements on Radioactive Waste Disposal Containers During Experimental Drop Testing

2011 ◽  
Author(s):  
Thomas Quercetti ◽  
Andre Musolff ◽  
Karsten Mu¨ller
Keyword(s):  
Radioactive Waste ◽  
Motion Analysis ◽  
High Speed ◽  
Measurement Techniques ◽  
Radioactive Waste Disposal ◽  
Test Results ◽  
Federal Institute ◽  
Materials Research ◽  
Drop Tests ◽  
Main Basis

In context with disposal container safety assessment of containers for radioactive waste the German Federal Institute for Materials Research and Testing (BAM) performed numerous drop tests in the last years. The tests were accompanied by extensive and various measurement techniques especially by instrumented measurements with strain gages and accelerometers. The instrumentation of a specimen is an important tool to evaluate its mechanical behavior during impact. Test results as deceleration-time and strain-time functions constitute a main basis for the validation of assumptions in the safety analysis and for the evaluation of calculations based on finite-element methods. Strain gauges are useful to determine the time dependent magnitude of any deformation and the associated stresses. Accelerometers are widely used for the measuring of motion i.e. speed or the displacement of the rigid cask body, vibration and shock events. In addition high-speed video technique can be used to visualize and analyze the kinematical impact scenario by motion analysis. The paper describes some selected aspects on instrumented measurements and motion analysis in context with low level radioactive waste (LLW) container drop testing.

New method to evaluate three-dimensional push-off angle during short-track speed skating using wearable inertial measurement unit sensors

2019 ◽  
Vol 233 (4) ◽  
pp. 476-480 ◽  
Author(s):  
Kyungsoo Kim ◽  
Jun Seok Kim ◽  
Tserenchimed Purevsuren ◽  
Batbayar Khuyagbaatar ◽  
SuKyoung Lee ◽  
...  
Keyword(s):  
Motion Analysis ◽  
Inertial Measurement Unit ◽  
High Speed ◽  
Three Dimensional ◽  
Analysis Data ◽  
New Method ◽  
Measurement Unit ◽  
Angle Estimation ◽  
Inertial Measurement ◽  
Speed Skating

The push-off mechanism to generate forward movement in skating has been analyzed by using high-speed cameras and specially designed skates because it is closely related to skater performance. However, using high-speed cameras for such an investigation, it is hard to measure the three-dimensional push-off force, and a skate with strain gauges is difficult to implement in the real competitions. In this study, we provided a new method to evaluate the three-dimensional push-off angle in short-track speed skating based on motion analysis using a wearable motion analysis system with inertial measurement unit sensors to avoid using a special skate or specific equipment insert into the skate for measurement of push-off force. The estimated push-off angle based on motion analysis data was very close to that based on push-off force with a small root mean square difference less than 6% when using the lateral marker in the left leg and the medial marker in the right leg regardless of skating phase. These results indicated that the push-off angle estimation based on motion analysis data using a wearable motion capture system of inertial measurement unit sensors could be acceptable for realistic situations. The proposed method was shown to be feasible during short-track speed skating. This study is meaningful because it can provide a more acceptable push-off angle estimation in real competitive situations.

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