Accuracy and repeatability of an inertial measurement unit system for field-based occupational studies

Details

• Personal Author:
  Chen H ; Douphrate DI ; Fethke NB ; Oyama S ; Schall MC Jr.
• Description:
  The accuracy and repeatability of an inertial measurement unit (IMU) system for directly measuring trunk angular displacement and upper arm elevation was evaluated over eight hours (i) in comparison to a gold-standard, optical motion capture (OMC) system in a laboratory setting, and (ii) during a field-based assessment of dairy parlor work. Sample-to-ample root mean square differences (RMSD) between the IMU and OMC system ranged from 4.1 degrees -6.6 degrees for the trunk and 7.2 degrees -12.1 degrees for the upper arm depending on the processing method. Estimates of mean angular displacement and angular displacement variation (difference between the 90th and 10th percentiles of angular displacement) were observed to change <4.5 degrees on average in the laboratory and <1.5 degrees on average in the field per eight hours of data collection. Results suggest the IMU system may serve as an acceptable instrument for directly measuring trunk upper arm postures in field-based occupational exposure assessment studies with long sampling durations. [Description provided by NIOSH]
• Subjects:
  Ergonomics Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety
• Keywords:
  Agriculture Ergonomics Author Keywords: Ergonomics Tools And Methods Back Pain Body-mechanics Extremities Measurement-equipment Musculoskeletal-system-disorders Musculoskeletal Disorders Physiological-function Physiology Posture Upper Limb Disorders

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• ISSN:
  0014-0139
• Document Type:
  Text
• Funding:
  Cooperative Agreement ; Grant
• Genre:
  Journal Article
• Place as Subject:
  Alabama ; Iowa ; OSHA Region 4 ; OSHA Region 6 ; OSHA Region 7 ; Texas
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  59
• Issue:
  4
• NIOSHTIC Number:
  nn:20046583
• Citation:
  Ergonomics 2016 Apr; 59(4):591-602
• Contact Point Address:
  Mark C. Schall Jr., Department of Industrial and Systems Engineering, Auburn University, Auburn, AL, USA
• Email:
  mark-schall@eng.auburn.edu
• Federal Fiscal Year:
  2016
• NORA Priority Area:
  Agriculture, Forestry and Fishing
• Performing Organization:
  University of Iowa, Iowa City
• Peer Reviewed:
  True
• Start Date:
  20010930
• Source Full Name:
  Ergonomics
• End Date:
  20270929
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:af0cb3e17b18185da0e864deb5ebeef8d5d28f7049a4692659b8c39b4dfb625cd72b68cac8e8356df6d57ff32eeecc285522ffb471ef565807a97cb87c8ed51a
• Download URL:
  https://stacks.cdc.gov/view/cdc/201594/cdc_201594_DS1.pdf
• File Type:
  [PDF - 1.48 MB ]