USN AND DFMF BASED VITAL SIGN MONITORING SYSTEM

摘要

A system for monitoring human biometric data based on USN(Ubiquitous Sensor Network) and DTMF(Dual-Tone Multimedia-Frequency) communication is provided to conveniently and efficiently perform healthcare by making a user measure blood pressure personally with a home tonometer and transmitting measurement to a management center. Blood pressure data is obtained by using a tonometer. The blood pressure data is transmitted in a USN node by using a UART(Universal Asynchronous Receiver/Transmitter) . The USN node transmits the received blood pressure data to the USN node connected with a PSTN(Public Switched Telephone Network) modem by using Zigbee. The PSTN modem transmits the blood pressure data to a management center through a telephone link by using a DTMF mode.