A study on sleep posture analysis using fibre bragg grating arrays based mattress.
Manish Mishra1, Prasant Kumar Sahu1, Mrinal Datta1
1School of Electrical Sciences, Indian Institute of Technology, Bhubaneswar, Odisha, India.
Biomedical Physics & Engineering Express
|October 25, 2024
Summary
Fibre Bragg Grating (FBG) arrays effectively monitored strain changes from various sleeping postures. Shoulder and lower body sensors were key in distinguishing between different body positions.
Area of Science:
- Biomedical Engineering
- Sensor Technology
- Biomechanics
Background:
- Prolonged or unusual sleeping postures can cause various health issues, including subacromial impingement syndrome and gastroesophageal reflux.
- Fibre Bragg Gratings (FBGs) are popular optical sensors known for their small size, high sensitivity, and flexibility.
- FBG arrays offer advantages in data collection, sensor location mitigation, and multiplexing.
Purpose of the Study:
- To analyze strain patterns generated by different sleeping postures using liquid silicone encapsulated FBG arrays.
- To evaluate the effectiveness of FBG arrays in discriminating between various body positions during sleep.
- To assess the reliability and strain-handling capabilities of liquid silicone encapsulated FBG arrays.
Main Methods:
- Liquid silicone encapsulated FBG arrays were placed on the head, shoulder, and lower body regions.
- Strain patterns were analyzed for four sleeping postures: Supine, Left Fetus, Right Fetus, and Over stomach.
- Strain data was analyzed both individually and by averaging data from each FBG in the array, utilizing 3D histograms.
Main Results:
- FBG arrays responded swiftly to strain changes associated with different sleeping postures.
- Arrays in the lower half and shoulder regions were crucial for discriminating between body postures.
- The average standard deviation of strain ranged from 0.1 to 0.19, indicating reliable strain-handling capabilities.
Conclusions:
- Liquid silicone encapsulated FBG arrays are effective tools for monitoring strain patterns during sleep.
- The sensor placement in shoulder and lower body regions is pivotal for accurate posture identification.
- The study demonstrates the potential of FBG arrays for long-term monitoring and understanding sleep-related biomechanics.
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