scholarly journals Precision, repeatability and accuracy of Optotrak® optical motion tracking systems

2009 ◽  
Vol 1 (1) ◽  
pp. 114 ◽  
Author(s):  
Jill Schmidt ◽  
Devin R. Berg ◽  
Heidi Lynn Ploeg ◽  
Leone Ploeg
Keyword(s):  
Motion Tracking ◽  
Tracking Systems ◽  
Optical Motion ◽  
Optical Motion Tracking

scholarly journals Precision, repeatability and accuracy of Optotrak® optical motion tracking systems

2016 ◽  
Author(s):  
Jill Schmidt ◽  
Devin R. Berg
Keyword(s):  
Rigid Body ◽  
Motion Tracking ◽  
Surgical Navigation ◽  
Plane Motion ◽  
Human Motion ◽  
Tracking Systems ◽  
Total Displacement ◽  
Camera Systems ◽  
Optical Motion ◽  
Optical Motion Tracking

In the field of biomechanics, optical motion tracking systems are commonly used to record human motion and assist in surgical navigation. Recently, motion tracking systems have been used to track implant and bone motion on a micron-level. The present study evaluated four different Optotrak® motion tracking systems to determine the precision, repeatability and accuracy under static testing conditions. The distance between the camera systems and the rigid body, as well as the tilt angle of the rigid body, did affect the resulting precision, repeatability and accuracy of the camera systems. The precision and repeatability, calculated as the within-trial and between-trial standard deviations, respectively, were less than 30 µm; with some configurations producing precision and repeatability less than 1 µm. The accuracy was less than 0.53% of the total displacement for the in-plane motion and less than 1.56% of the total displacement for the out-of-plane motion.

scholarly journals Modern Facilities for Experimental Measurement of Dynamic Loads Induced by Humans: A Literature Review

2013 ◽  
Vol 20 (1) ◽  
pp. 53-67 ◽  
Author(s):  
Vitomir Racic ◽  
Aleksandar Pavic ◽  
James Mark William Brownjohn
Keyword(s):  
Motion Tracking ◽  
Inertial Sensors ◽  
Force Plate ◽  
Contact Forces ◽  
Tracking Systems ◽  
Force Measurements ◽  
Foot Pressure ◽  
Engineering Structures ◽  
Optical Motion ◽  
Optical Motion Tracking

This paper provides a critical overview of available technology and facilities for determining human-induced dynamic forces of civil engineering structures, such as due to walking, running, jumping and bouncing. In addition to traditional equipment for direct force measurements comprising force plate(s), foot pressure insoles and instrumented treadmills, the review also investigates possibility of using optical motion tracking systems (marker-based and marker-free optoelectronic technology) and non-optical motion tracking systems (inertial sensors) to reproduce contact forces between humans and structures based on body kinematics data and known body mass distribution. Although significant technological advancements have been made in the last decade, the literature survey showed that the state-of-the-art force measurements are often limited to individuals in artificial laboratory environments. Experimental identification of seriously needed group- and crowd-induced force data recorded on as-built structures, such as footbridges, grandstands and floors, still remains a challenge due to the complexity of human actions and the lack of adequate equipment.

Monitoring of earthquake induced motions and damage with optical motion tracking

2005 ◽  
Vol 14 (3) ◽  
pp. S32-S38 ◽  
Author(s):  
Katsuhisa Kanda ◽  
Yuji Miyamoto ◽  
Akihiro Kondo ◽  
Makoto Oshio
Keyword(s):  
Motion Tracking ◽  
Optical Motion ◽  
Optical Motion Tracking

scholarly journals A Low-Cost Motion Capture System for Small-Scale Wave Energy Device Tank Testing

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
Francesco Paparella ◽  
Satja Sivcev ◽  
Daniel Toal ◽  
John V. Ringwood
Keyword(s):  
Wave Energy ◽  
Motion Tracking ◽  
Tracking System ◽  
Low Cost ◽  
Measurement Unit ◽  
Small Scale ◽  
Energy Device ◽  
Optical Motion ◽  
Optical Motion Tracking ◽  
Motion Tracking System

The measurement of the motion of a small-scale wave energy device during wave tank tests is important for the evaluation of its response to waves and the assessment of power production. Usually, the motion of a small-scale wave energy converter (WEC) is measured using an optical motion tracking system with high precision and sampling rate. However, the cost for an optical motion tracking system can be considerably high and, therefore, the overall cost for tank testing is increased. This paper proposes a low-cost capture system composed of an inertial measurement unit and ultrasound sensors. The measurements from the ultrasound sensors are combined optimally with the measurements from the inertial measurement unit through an extended Kalman filter (EKF) in order to obtain an accurate estimation of the motion of a WEC.

Advantages and Limitations of Prospective Head Motion Compensation for MRI Using an Optical Motion Tracking Device

2006 ◽  
Vol 13 (9) ◽  
pp. 1093-1103 ◽  
Author(s):  
Christian Dold ◽  
Maxim Zaitsev ◽  
Oliver Speck ◽  
Evelyn A. Firle ◽  
Jürgen Hennig ◽  
...  
Keyword(s):  
Motion Compensation ◽  
Motion Tracking ◽  
Head Motion ◽  
Optical Motion ◽  
Optical Motion Tracking ◽  
Tracking Device

scholarly journals Accuracy of an electrogoniometer relative to optical motion tracking for quantifying wrist range of motion

2020 ◽  
Vol 44 (2) ◽  
pp. 49-54 ◽  
Author(s):  
Brian P. McHugh ◽  
Amy M. Morton ◽  
Bardiya Akhbari ◽  
Janine Molino ◽  
Joseph J. Crisco
Keyword(s):  
Range Of Motion ◽  
Motion Tracking ◽  
Optical Motion ◽  
Optical Motion Tracking
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