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Current Trends in Gait Analysis: Advanced Techniques for Data Acquisition and Analysis

  • Tomokazu Hattori

Summary

For kinematic gait measurement, a video device was developed using television techniques and optoreflective markers, and a personalcomputer-based three-dimensional system was completed using direct linear transformation (DLT) method for three-dimensional calibration. Accuracy of the three-dimensional system was examined, and root mean square (RMS) errors of 3.3 mm, 2.6 mm, 1.4 mm in the X, Y, and Z axes were obtained with a camera angle of 60° and camera distance of 3 m. For kinetic measurement, a twin long force plate system was developed, which can measure the triaxial force components for several steps. The frequency response of the long force plate was investigated, and a finite impulse response (FIR) filter with a cutoff frequency of 10 Hz was designed and applied for an automatic data analysis program. Basic knowledge on gait analysis expressly stated in the program allowed detection of gait events and particular peak values, and calculation of time factors and stride dimensions. This kinetic measurement system was used on 95 normal female subjects, and mean values and standard ranges of those parameters were obtained in each age group.

Keywords

Ground Reaction Force Finite Impulse Response Gait Analysis Gait Cycle Lens Distortion 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Tokyo 1992

Authors and Affiliations

  • Tomokazu Hattori
    • 1
  1. 1.Department of Orthopaedic SurgeryAichi Medical UniversityNagakute, AichiJapan

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