Abstract
BackgroundPressure sensors have been used for sleeping posture detection, which meet privacy requirements. Most of the existing techniques for sleeping posture recognition used force-sensitive resistor (FSR) sensors. However, lower limbs cannot be recognized accurately unless thousands of sensors are deployed on the bedsheet.MethodWe designed a sleeping posture recognition scheme in which FSR sensors were deployed on the upper part of the bedsheet to record the pressure distribution of the upper body. In addition, an infrared array sensor was deployed to collect data for the lower body. Posture recognition was performed using a fuzzy c-means clustering algorithm. Six types of sleeping body posture were recognized from the combination of the upper and lower body postures.ResultsThe experimental results showed that the proposed method achieved an accuracy of above 88%. Moreover, the proposed scheme is cost-efficient and easy to deploy.ConclusionsThe proposed sleeping posture recognition system can be used for pressure ulcer prevention and sleep quality assessment. Compared to wearable sensors and cameras, FSR sensors and infrared array sensors are unobstructed and meet privacy requirements. Moreover, the proposed method provides a cost-effective solution for the recognition of sleeping posture.
Highlights
Pressure sensors have been used for sleeping posture detection, which meet privacy requirements
This paper presents a sleeping posture recognition scheme based on force-sensing resistor (FSR) and infrared array sensors
The sleeping posture recognition accuracy of the proposed method was as shown in Table 2; the average sleeping posture recognition accuracy was 88.05%
Summary
Pressure sensors have been used for sleeping posture detection, which meet privacy requirements. Most of the existing techniques for sleeping posture recognition used force-sensitive resistor (FSR) sensors. Method: We designed a sleeping posture recognition scheme in which FSR sensors were deployed on the upper part of the bedsheet to record the pressure distribution of the upper body. Conclusions: The proposed sleeping posture recognition system can be used for pressure ulcer prevention and sleep quality assessment. The proposed method provides a cost-effective solution for the recognition of sleeping posture. The sleeping posture of bed-bound patients needs to be regularly changed in order to reduce the risk of developing pressure ulcers [1], and bed sensor systems have been developed to recognize sleeping postures. Sleeping on the right side has a higher risk than sleeping on the left side of development of transient lower esophageal sphincter relaxation, which is a main factor in nocturnal gastroesophageal reflux [5, 6]
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