Development of Wireless Bio-telemetry System Using Fm Stereo Method

Development of telemetry system is used for Transmission and detection of vital body signals. The transmitting unit detects and sends two kinds of patient’s vital signals. The stationary receiving unit receives and analyzes the signals and alerts a nurse to the dangers of the patient if necessary. The system could be simplified and minimized in size by using commercialized electronic components. The main aim of this project to inform doctor about patient condition continuously. In this project two parameters namely temperature and heart rate are measured. Abnormality in any one of the parameter will be informed to the doctor through FM receiver. The main aim of this project to inform doctor about patient condition continuously. In these project two parameters namely temperature and heart rate are measured. Abnormality in any one of the parameter will be informed to the doctor through FM receiver. Temperature is sensed by using, two terminal IC AD590 which gives current output directly proportional to absolute temperature variations. This is amplified using instrumentation amplifier, and read to analog and digital converter. A microphone sensor is used to detect patient’s heart sound. The standard FM stereo modulation method and a commercialized single IC chip were incorporated to reduce the size of the transmitter and increase signal-to-noise ratio. In the receiving unit a standard FM receiving module could be used to restore the original signal with very low cost. After detecting, the signal is processed by digital filters, and the extracted patients’ parameters are displayed on CRT monitor.