Estimation of Stride Length, Foot Clearance, and Foot Progression Angle Using UWB Sensors

Ji Su Park, Bohyun Lee, Shinsuk Park, Choong Hyun Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Stride length (SL), foot clearance (FC), and foot progression angle (FPA) are the key parameters for diagnosing gait disorders. This study used the distance data between two feet measured by ultra-wideband (UWB) sensors installed on shoes and proposed a method for estimating the three gait parameters. Here, a method of compensating the offset of the UWB sensor and estimating the distances between a base sensor installed on one foot during the stance phase and three UWB sensors on the other during the swing phase was applied. Foot trajectory was acquired in a gait experiment with ten healthy adults walking on a treadmill. The results were compared with those obtained using a motion capture system (MCS). The UWBs sensor displayed average errors of 45.84 mm, 7.60 mm, and 2.82° for SL, FC, and FPA, respectively, compared with the MCS. A similar accuracy level was achieved in a previous study that used an inertial measurement unit (IMU). Thus, these results suggest that UWB sensors can be extensively applied to sensor systems used to analyze mobile gait systems.

Original languageEnglish
Article number4801
JournalApplied Sciences (Switzerland)
Issue number8
Publication statusPublished - 2023 Apr

Bibliographical note

Funding Information:
This research was funded by the Korea Institute of Science and Technology (KIST) Institutional Program (project nos. 2E31642 and 2E32341).

Publisher Copyright:
© 2023 by the authors.


  • foot clearance
  • foot progression angle
  • gait parameter
  • stride length
  • ultra-wideband

ASJC Scopus subject areas

  • General Materials Science
  • Instrumentation
  • General Engineering
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


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