Gait Stance Ratio One Leg

Compute the stance-to-stride ratio for one leg during walking.


Nodes Required: 1

  • Sensing (1): foot (top, switch pointing forward)

Algorithm & Parameters

The app computes the gait phase using raw gyroscope data from a foot-mounted IMU and determines the ratio of stance phase duration to stride duration.

Parameters

  • Strides for Average: How many strides are used to compute a running average.

  • Inactive Period (s): The maximum allowed duration of no gait phase change before a fallback stance ratio of 1.0 is reported.

Description of Data in Downloaded File

Calculated Fields

  • time (sec): Time since trial start

  • Gait_Phase: 0 = Stance, 1 = Swing

  • Stance_Ratio: Stance-to-stride ratio of a foot

Sensor Raw Data Values

  • SensorIndex: index of raw sensor data

  • AccelX/Y/Z (m/s^2): raw acceleration data

  • GyroX/Y/Z (deg/s): raw gyroscope data

  • MagX/Y/Z (μT): raw magnetometer data

  • Quat1/2/3/4: quaternion data (Scaler first order)

  • Sampletime: timestamp of the sensor value

  • Package: package number of the sensor value

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