A novel method for estimating knee angle using two leg-mounted gyroscopes for continuous monitoring with mobile health devices

Eric Allseits, Kyoung Jae Kim, Christopher Bennett, Robert Gailey, Ignacio Gaunaurd, Vibhor R Agrawal

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Tele-rehabilitation of patients with gait abnormalities could benefit from continuous monitoring of knee joint angle in the home and community. Continuous monitoring with mobile devices can be restricted by the number of body-worn sensors, signal bandwidth, and the complexity of operating algorithms. Therefore, this paper proposes a novel algorithm for estimating knee joint angle using lower limb angular velocity, obtained with only two leg-mounted gyroscopes. This gyroscope only (GO) algorithm calculates knee angle by integrating gyroscope-derived knee angular velocity signal, and thus avoids reliance on noisy accelerometer data. To eliminate drift in gyroscope data, a zero-angle update derived from a characteristic point in the knee angular velocity is applied to every stride. The concurrent validity and construct convergent validity of the GO algorithm was determined with two existing IMU-based algorithms, complementary and Kalman filters, and an optical motion capture system, respectively. Bland-Altman analysis indicated a high-level of agreement between the GO algorithm and other measures of knee angle.

Original languageEnglish (US)
Article number2759
JournalSensors (Switzerland)
Volume18
Issue number9
DOIs
StatePublished - Sep 1 2018

Fingerprint

Telemedicine
Gyroscopes
gyroscopes
health
Leg
Knee
estimating
Equipment and Supplies
Monitoring
Angular velocity
angular velocity
Knee Joint
gait
filters
abnormalities
Kalman filters
accelerometers
limbs
Gait
Accelerometers

Keywords

  • Gait analysis
  • Gyroscope
  • Inertial measurement unit (IMU)
  • Knee angular velocity
  • Knee joint angle
  • Mobile health

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

Cite this

A novel method for estimating knee angle using two leg-mounted gyroscopes for continuous monitoring with mobile health devices. / Allseits, Eric; Kim, Kyoung Jae; Bennett, Christopher; Gailey, Robert; Gaunaurd, Ignacio; Agrawal, Vibhor R.

In: Sensors (Switzerland), Vol. 18, No. 9, 2759, 01.09.2018.

Research output: Contribution to journalArticle

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