Cardiac Signal Acquisition And Processing On Android Smart Phones

Abstract

Several projects based on Smart-phone systems have been presented in various industries and many more application possibilities are being studied. A major issue remaining unanswered is the potential of obtaining external information, such as data from other Sensors. Sensor interface is thus achievable provided a proper front-end able to digitize Sensor data and to manage the connection with the Smartphone is adopted. In order to lessen the complexity and the cost of the front-end as well as to reduce its power consumption, an efficient approach for the collection of external sensor data using the Smartphone audio input is suggested in this work. A sensor system comprised of a photoplethysmographic sensor for Cardiac signal monitoring and a pair of electrodes for tissue impedance assessment has been employed. Specific software routines for Android operating system have been written to analyze the obtained Sensor signals giving Visualization, Data storage and basic Data analysis, and so showing the practicality of the suggested technique.