Designed Of Wearable Physical Parameter Detection And Research On Low Power And Miniaturization

Early wearable technology for medical is used in military and aviation. However, along with the development of science and technology, it widely used in clinical, home health care and special populations care. It overcomes the limitations of traditional wired detection and can acquire the physical parameters in natural state. What's more, it provides an effective solution of personalized wireless health care for community and home. This paper designs modules of physical parameters detection, which have the function of signal acquisition, wireless communication and data processing with CC2430 as the core. And then, make some studies on low power and miniaturization.Completes hardware design of ZigBee sensor nodes based on TI's SOC CC2430 that built-in RF radio frequency, ADC, UART modules, which can perform signal acquisition, communication and processing of front-end. And put emphasis on solving the CC2430 hardware resource allocation and peripheral circuit design, power management and charging with battery-powered, PCB antenna, miniaturization interface and high-speed PCB layout.Designs three-lead ECG and Oxygen saturation wearable modules thought comparison, analysis and summary with the traditional detection modules.Details analysis the main factors of power consumption of the medical sensor node and elaborate the announcements under low power system design. Then present some solutions, such as sleep mechanism, code optimization, selection chips of same power-supply with one company produces and dynamic power management. Also, it lists some solutions in miniaturization, such as using SMD (Surface Mounted Device) with small package, FFC (Flexible Flat Cable) and FFC connector, embedded PCB antennas and time multiplexing the hardware. Each module has the advantages of strong adaptability, easy-to-use, small size, low power consumption and easy for user to wear.We built a simple test system for hardware test, including a star-like network with simple ZigBee protocol stack and monitoring GUI, which can realize data collection, wireless communication, real-time wave display and playback. Finally, we make some test with the modules and the results indicate that the signals that wearable hardware modules acquired reflect the signal characteristics, which significantly reduced the module size and easy-operating for wearable monitoring.