Accuracy of a System for Measuring Three-Dimensional Torso Kinematics During Manual Materials Handling

Details

• Personal Author:
  Current RS ; Giorcelli, Rebecca J. ; Hughes RE ; Myers, John R.
• Description:
  This paper describes a procedure developed and validated to assess the accuracy of an infrared-based motion measurement system used to perform a kinematic analysis of the torso with respect to the pelvis during simulated lifting tasks. Two rigid reflective marker triads were designed and fabricated for attachment to the thorax over the 6th thoracic vertebra and the pelvis. System accuracy was assessed for planar rotation as well as rotations about multiple orthogonal axes. A test fixture was used to validate known triad orientations. The spatial coordinates of these triads were collected at 120 Hz using a ProReflex motion measurement system. Single value decomposition was used to estimate a rotation matrix describing the rigid body motion of the thorax triad relative to the sacral triad at each point in time. Euler angles corresponding to flexion, lateral bending, and twisting were computed from the rotation matrix. All measurement error residuals for flexion, lateral bending, and twisting were below 1.75 degrees. The estimated mean measurement errors were less than 1 degree in all three planes. These results suggest that the motion measurement system is reliable and accurate to within approximately 1.5 degrees for the angles examined. [Description provided by NIOSH]
• Subjects:
  Manufacturing And Industrial Facilities Musculoskeletal System Occupational Health Safety
• Keywords:
  Author Keywords: Spine Lifting Manual-lifting Manual-materials-handling Materials-handling Monitoring-systems Motion-studies Motion Measurement Posture
• ISSN:
  1065-8483
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Michigan ; OSHA Region 3 ; OSHA Region 5 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSR - Division of Safety Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  185-194
• Volume:
  20
• Issue:
  2
• NIOSHTIC Number:
  nn:20025682
• Citation:
  J Appl Biomech 2004 May; 20(2):185-194
• Contact Point Address:
  Division of Safety Research, National Institute for Occupational Safety and Health, 1095 Willowdale Road, MS-G800, Morgantown, WV 26505
• Federal Fiscal Year:
  2004
• NORA Priority Area:
  Construction
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Applied Biomechanics
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3b7098c6c863b04ab09a7003128f39aaef9176c824cafd9f7fe7ba74135f2e8efbc090611e0f1058d5a6e2c5e0876d3b3ef6c7d0ebc0c0a9e25c0397448ef480
• Download URL:
  https://stacks.cdc.gov/view/cdc/196947/cdc_196947_DS1.pdf
• File Type:
  [PDF - 1.14 MB ]