scholarly journals Implementation of Kinetic and Kinematic Variables in Ergonomic Risk Assessment Using Motion Capture Simulation: A Review

2021 ◽  
Vol 18 (16) ◽  
pp. 8342
Author(s):  
Muhamad Nurul Hisyam Yunus ◽  
Mohd Hafiidz Jaafar ◽  
Ahmad Sufril Azlan Mohamed ◽  
Nur Zaidi Azraai ◽  
Md. Sohrab Hossain
Keyword(s):  
Risk Assessment ◽  
Motion Capture ◽  
Low Cost ◽  
Classical Mechanics ◽  
Assessment Method ◽  
Work Related ◽  
Optical Motion ◽  
Optical Motion Capture ◽  
Ergonomic Risk Assessment ◽  
Ergonomic Risk

Work-related musculoskeletal disorders (WMSDs) are among the most common disorders in any work sector and industry. Ergonomic risk assessment can reduce the risk of WMSDs. Motion capture that can provide accurate and real-time quantitative data has been widely used as a tool for ergonomic risk assessment. However, most ergonomic risk assessments that use motion capture still depend on the traditional ergonomic risk assessment method, focusing on qualitative data. Therefore, this article aims to provide a view on the ergonomic risk assessment and apply current motion capture technology to understand classical mechanics of physics that include velocity, acceleration, force, and momentum in ergonomic risk assessment. This review suggests that using motion capture technologies with kinetic and kinematic variables, such as velocity, acceleration, and force, can help avoid inconsistency and develop more reliable results in ergonomic risk assessment. Most studies related to the physical measurement conducted with motion capture prefer to use non-optical motion capture because it is a low-cost system and simple experimental setup. However, the present review reveals that optical motion capture can provide more accurate data.

Research on Intangible Cultural Heritage Based on Motion Capture

2014 ◽  
Vol 568-570 ◽  
pp. 676-680
Author(s):  
Si Xi Chen ◽  
Shu Chen
Keyword(s):  
Cultural Heritage ◽  
Motion Capture ◽  
Low Cost ◽  
Three Dimensional ◽  
Intangible Cultural Heritage ◽  
Three Dimensional Model ◽  
Motion Data ◽  
Optical Motion ◽  
Capture Method ◽  
Optical Motion Capture

The application of digital technology on the protection of intangible cultural heritage is a major topic of research in recent years. The motion capture technology of protection will gradually replace the traditional recording methods such as texts, pictures and videos. It is valuable to build a high-fidelity, high-modular and low-cost digital platform for choreographic data collection and extended application. This paper studies the intangible cultural heritage of Quanzhou breast-clapping dance, one of the most famous choreographic intangible cultural heritages from China with standard optical motion capture method. The data are acquiring and processing after the dance motion capture, we binds the motion data and three-dimensional model using Motion Builder and build digital demonstration platform base on an OGRE engine to display the movements. The viewer can view at any angle and distance. The system can be easily applied in motion intangible cultural heritages protection project. Furthermore, the system can be provided versatile motion data for additional use.

scholarly journals Accuracy of a Low-Cost 3D-Printed Wearable Goniometer for Measuring Wrist Motion

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4799
Author(s):  
Calvin Young ◽  
Sarah DeDecker ◽  
Drew Anderson ◽  
Michele L. Oliver ◽  
Karen D. Gordon
Keyword(s):  
Motion Capture ◽  
Low Cost ◽  
Wearable Device ◽  
Matching Task ◽  
Motion Capture System ◽  
Wrist Motion ◽  
Flexion Extension ◽  
Optical Motion ◽  
3D Printed ◽  
Optical Motion Capture

Wrist motion provides an important metric for disease monitoring and occupational risk assessment. The collection of wrist kinematics in occupational or other real-world environments could augment traditional observational or video-analysis based assessment. We have developed a low-cost 3D printed wearable device, capable of being produced on consumer grade desktop 3D printers. Here we present a preliminary validation of the device against a gold standard optical motion capture system. Data were collected from 10 participants performing a static angle matching task while seated at a desk. The wearable device output was significantly correlated with the optical motion capture system yielding a coefficient of determination (R2) of 0.991 and 0.972 for flexion/extension (FE) and radial/ulnar deviation (RUD) respectively (p < 0.0001). Error was similarly low with a root mean squared error of 4.9° (FE) and 3.9° (RUD). Agreement between the two systems was quantified using Bland–Altman analysis, with bias and 95% limits of agreement of 3.1° ± 7.4° and −0.16° ± 7.7° for FE and RUD, respectively. These results compare favourably with current methods for occupational assessment, suggesting strong potential for field implementation.

scholarly journals An Evaluation of Motion Trackers with Virtual Reality Sensor Technology in Comparison to a Marker-Based Motion Capture System Based on Joint Angles for Ergonomic Risk Assessment

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3145
Author(s):  
Jan P. Vox ◽  
Anika Weber ◽  
Karen Insa Wolf ◽  
Krzysztof Izdebski ◽  
Thomas Schüler ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Motion Capture ◽  
Risk Assessments ◽  
Motion Capture System ◽  
Tracking Systems ◽  
Joint Angles ◽  
Work Processes ◽  
Optical Motion ◽  
Optical Motion Capture ◽  
Ergonomic Risk

The reproduction and simulation of workplaces, and the analysis of body postures during work processes, are parts of ergonomic risk assessments. A commercial virtual reality (VR) system offers the possibility to model complex work scenarios as virtual mock-ups and to evaluate their ergonomic designs by analyzing motion behavior while performing work processes. In this study a VR tracking sensor system (HTC Vive tracker) combined with an inverse kinematic model (Final IK) was compared with a marker-based optical motion capture system (Qualisys). Marker-based optical motion capture systems are considered the gold standard for motion analysis. Therefore, Qualisys was used as the ground truth in this study. The research question to be answered was how accurately the HTC Vive System combined with Final IK can measure joint angles used for ergonomic evaluation. Twenty-six subjects were observed simultaneously with both tracking systems while performing 20 defined movements. Sixteen joint angles were analyzed. Joint angle deviations between ±6∘ and ±42∘ were identified. These high deviations must be considered in ergonomic risk assessments when using a VR system. The results show that commercial low-budget tracking systems have the potential to map joint angles. Nevertheless, substantial weaknesses and inaccuracies in some body regions must be taken into account. Recommendations are provided to improve tracking accuracy and avoid systematic errors.

scholarly journals Präzisere ergonomische Risikobeurteilung durch die Kombination von Inertialsensoren mit observatorischen Methoden am Beispiel von RULA

2020 ◽  
Vol 70 (5) ◽  
pp. 236-239
Author(s):  
L. Maltry ◽  
F. Holzgreve ◽  
C. Maurer ◽  
E. M. Wanke ◽  
D. Ohlendorf
Keyword(s):  
Risk Assessment ◽  
Motion Capture ◽  
Upper Limb ◽  
Assessment Tools ◽  
Körperliche Belastung ◽  
Risk Assessment Tools ◽  
Ergonomic Risk Assessment ◽  
Ergonomic Risk

Zusammenfassung Zur ergonomischen Beurteilung von Arbeitsplätzen werden „ergonomic risk assessment tools“ (ERAT) verwendet. Mithilfe dieser kann die körperliche Belastung evaluiert und hinsichtlich eines biomechanischen Überlastungsrisikos bewertet werden. Dazu gehören neben Eigenangaben auch observatorische Methoden, deren Ergebnisse in Punktwerten („Scores“) zusammengefasst werden, wie z. B. die RULA-Methode („rapid upper limb assessment“). Durch die technische Weiterentwicklung direkter Messmethoden können inertiale Motion-Capture-Systeme im 21. Jahrhundert präzise und kontinuierliche objektive Daten liefern. In einem neuen Ansatz wurde die observatorische Scoring-Methode RULA modifiziert und auf die digital erhobenen Daten angewendet, was differenzierte ergonomische Betrachtungen ganzer Arbeitsabläufe ermöglicht.

scholarly journals Evaluation of Inertial Sensor Data by a Comparison with Optical Motion Capture Data of Guitar Strumming Gestures

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5722
Author(s):  
Sérgio Freire ◽  
Geise Santos ◽  
Augusto Armondes ◽  
Eduardo A. L. Meneses ◽  
Marcelo M. Wanderley
Keyword(s):  
Motion Capture ◽  
Inertial Sensor ◽  
Low Cost ◽  
Sensor Data ◽  
Level Control ◽  
Interactive Music ◽  
Acceleration Data ◽  
Optical Motion ◽  
Optical Motion Capture ◽  
High Level

Computing technologies have opened up a myriad of possibilities for expanding the sonic capabilities of acoustic musical instruments. Musicians nowadays employ a variety of rather inexpensive, wireless sensor-based systems to obtain refined control of interactive musical performances in actual musical situations like live music concerts. It is essential though to clearly understand the capabilities and limitations of such acquisition systems and their potential influence on high-level control of musical processes. In this study, we evaluate one such system composed of an inertial sensor (MetaMotionR) and a hexaphonic nylon guitar for capturing strumming gestures. To characterize this system, we compared it with a high-end commercial motion capture system (Qualisys) typically used in the controlled environments of research laboratories, in two complementary tasks: comparisons of rotational and translational data. For the rotations, we were able to compare our results with those that are found in the literature, obtaining RMSE below 10° for 88% of the curves. The translations were compared in two ways: by double derivation of positional data from the mocap and by double integration of IMU acceleration data. For the task of estimating displacements from acceleration data, we developed a compensative-integration method to deal with the oscillatory character of the strumming, whose approximative results are very dependent on the type of gestures and segmentation; a value of 0.77 was obtained for the average of the normalized covariance coefficients of the displacement magnitudes. Although not in the ideal range, these results point to a clearly acceptable trade-off between the flexibility, portability and low cost of the proposed system when compared to the limited use and cost of the high-end motion capture standard in interactive music setups.

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