| Title |
Force Sensor and MSP430-based System for Motion Detection During Sleep |
| Authors |
김재필(Jaepil Kim) ; 박수지(Sooji Park) ; 신항식(Hangsik Shin) |
| DOI |
https://doi.org/10.5370/KIEE.2019.68.12.1612 |
| Keywords |
Force Sensor; Motion; MSP430; Respiration; Sleep Monitoring |
| Abstract |
The purpose of this study is to develop a system that can measure the movement of the human body during sleep in a way that does not constrain the body. In this study, a measurement system was implemented using a strip-type force sensor placed on a mattress, under the user's body, and an MSP430G2553 ultra-low-power processor. The strip sensor was fabricated using Polyvinylidene fluoride film. The signal obtained from the sensor was pre-processed and amplified through the developed analog front-end, and then converted to a digital signal through the ADC of MSP430. The MSP430 uses a timer interrupt and an ADC interrupt to minimize CPU operation time for low power operation. Through the comparison with the reference instrument, it was confirmed that the developed system can track the tossing, turning and breathing signals during sleep |