Design of battery-free real-time pulse detection system based on near field communication
Date of Issue2018
School of Mechanical and Aerospace Engineering
With great flexibility, high sensitivity, and low power consumption properties, wearable sensors can be widely used in many aspects, such as intelligent robots, human physiological signal detections, etc. Apart from fabrication and performance testing of wearable sensors, building efficient and reliable electronic system for sensors to broaden their application areas is also very important. With characteristics of extremely low power consumption, simple energy harvesting process and quickly contactless data acquisition, near-field communication (NFC) technology can be applied with specific wearable sensors to create miniaturized battery-free wireless devices and systems for signal detection and sample collection. This dissertation focuses on the application of a new type wearable pressure sensor in human healthcare and designs the related wearable devices based on NFC technology to detect the variation of human pulse. Firstly, previous work related to the design and application of wearable devices in human health monitoring and detection will be reviewed. Secondly, some critical design methods and procedures of the human pulse detection system will be described and shown thoroughly, including the fabrication of wearable pressure sensors, the layout of functional components in the detection system based on NFC technology, the pulse data acquisition and display facilitated by a demo app written by using Android Studio. According to the finished real-time pulse detection system, data acquisition process can be displayed by means of plotting in the NFC-enabled smartphone. Finally, the detected pulse information will be analyzed and some conclusions related to the detection system will be drawn. Future work of the detection system will be given in the end.