A portable health monitoring system using a PSoC Mixed Signal Array - Embedded.com

A portable health monitoring system using a PSoC Mixed Signal Array

Health monitoring systems become a hot topic and important research field today. Research on the monitoring were developed for many applications such as military, homecare unit, hospital, sports training and emergency monitoring system.

In this paper, we describe a wearable and real-time monitoring system of some critical vital signs for elderly people, where the vital signs of health status that are the important parameter in health monitoring system include blood pressure, heart rate, oxygen saturation, body temperature and respiratory rate.

In this work, we consider five parameter of the vital signs which are temperature, heart rate and oxygen saturation in blood, ph level, ECG. The pulse oximetry data helps to prevent and protect the oxygen lack in monitored patient’s blood stream.

This condition will occurs when the brain does not receive enough oxygen is called cerebral hypoxia. Moreover, pulse oximetry data can predict the patient’s disease and accident situation.

In this work, a portable real-time wireless health monitoring system is implemented using an 8-bit 8051-based PSoC1 (Programmable System on Chip). The developed acquisition system is used for remote monitoring of patients’ temperature, heart rate and oxygen saturation in blood i.e. pulse oximetry, pH level of blood, ECG.

This system allows the physician able to understand patient's scenario on the computer screen by wireless module. Here low cost, low power consumption and flexible network topology ZigBee wireless module is used to sense the remote patient data. All sensor data are transferred within a group of ZigBee wireless module.

The goal is to demonstrate the possibilities offered by system-on-chip programmable devices in specific processing systems, where the costs make the use of specific integrated circuits unaffordable.

The sensor unit consists of (1) temperature sensor; (2)two types of LEDs and photodiode packed in Velcro strip that is facing to a patient’s fingertip for pulse oximetry and heart beat; (3) three color LED with LDR for pH level;(4) ECG; and (5) a microcontroller unit for interfacing with wireless module, processing all biomedical sensor data sending to base PC. We adopted the wireless sensor ZigBee for using as a real-time health monitoring system on a patient.

We conclude that Programmable System on Chip (PSoC) has been the cost effective implementation used for wireless recording and transmission system of bio-medical signals. And it is very useful to the remote patients. The use of a microcontroller as the building block of the wireless recorder has the benefits of intelligence, compact size, and reliability.

Further advantage of this device is its low-power consumption, which is attractive for portable applications. Moreover, this part was also layout on a motherboard to increase its mechanical strength. The change of different front-end modules is thus speeded up.

We hope that the system should be adapted for minimizing the device’s size and allow for daily life usage. We also plan to include other health monitoring module such as; EMG, EEG for completing the system, and we hope that the system should be adapted for minimizing the device’s size and allow for daily life usage.

To read this external content in full, download the complete paper from the online archives at Ijrte.org.

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