Why the study?
The study was conducted to prototype, implement, and evaluate the performance of a pillow-type unrestrained heart rate measurement system using pressure sensors for sleep-state analysis.
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A prototype pillow-type pressure sensor system can practically measure heart rate changes from the neck to determine sleep stages.
In this paper, as an application method for a pillow-type system, we prototype and implement a heart rate measurement system using pressure sensors that are easy to install and evaluate the heart rate measurement performance. The proposed method uses a pressure sensor to obtain hardware and software for heart rate changes from the neck. PPI, the interval between heartbeats, is measured by detecting waveform peaks. As a result, the proposed approach is practical as a nonbinding heart rate measurement method in a pillow-type system for determining sleep stages.
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Harada et al. (2023) studied this question.
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