This repository includes Matlab code for extract relative angle between two IMU sensors. The code is based on the following paper: Ascertaining cervical range of motion from IMU sensors.
This study is a data descriptor of extraction cervical range of motion includes two parts.
This part aims to validate the extract angle from IMU sensors using the gold-standard method, a goniometer.
The main script is 'Analyze_PartA_Validation.m', the scripts read the data and extract the angle from the IMU sensors.
Figure 1: Universal goniometer, sensor placement, and reference system description. The Subject exhibits sensor and Goniometer placement for 3 planes. (A) Sagittal plane movement Flexion / Extension (Y axis). (B) Frontal plane movement, side Flexion (Z axis). (C) Horizontal plane movement, rotation (X-axis).
This part aims to assess the consistency of the measures by extracting the angle of the same movements recorded at different times.
The main script is 'Analyze_PartB_Reliability.m', the scripts read the data and extract the angle from the IMU sensors.
Figure 2: Sensor placement and body positioning for Part B. (A) Subject exhibiting flexion/extension (sagittal). (B) Subject exhibiting side flexion (Frontal). (C) Subject exhibiting rotation (Horizontal).
The data structure is detailed in the manuscript.
- Change data_path variable to the path of the data.
- Run the script to get the angle along the session, and save the results in the 'Results' folder.
Analyze_PartA_Validation-
Select the desired data file for the analysis.
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The script will plot the angle extracted from the IMU sensors for the 6 movements of the desired plane. Choose the desired segment and proceed to the next step, as instructed in the pop-up window.
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Example of 12 data cursors selected for the 6 movements of the desired plane.
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The angle extracted from the IMU sensors as csv file.
Analyze_PartB_Reliability-
Select the desired trails for the analysis, first pre then post.
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Select the desired anatomical plane for the analysis.
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Follow the instructions in the pop-up window to calibrate the data.
3.1. Select two points for the calibration (Pre - Blue, Pre - Red).
3.2. Adjust offset and onset of the angles according to the calibration points.
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Follow the instructions in the pop-up window and choose the desired segment and select 24 points.
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Example of 24 data cursors selected for the 6 movements of the desired plane.
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The angle extracted from the IMU sensors as csv file.
This software is provided for non-commercial use only. For commercial use, you must obtain a commercial license by contacting Ramot ([email protected]).
Shield:
This software is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
