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Wireless Sensor Network for Medical Applications

Authors: Hanady S.Ahmed --- Abduladhem Abdulkareem Ali
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2015 Volume: 11 Issue: 1 Pages: 49-59
Publisher: Basrah University جامعة البصرة

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Abstract

This work presents a healthcare monitoring system that can be used in an intensive care room. Biologicalinformation represented by ECG signals is achieved by ECG acquisition part . AD620 Instrumentation Amplifierselected due to its low current noise. The ECG signals of patients in the intensive care room are measured throughwireless nodes. A base node is connected to the nursing room computer via a USB port , and is programmed with aspecific firmware. The ECG signals are transferred wirelessly to the base node using nRF24L01+ wireless module.So, the nurse staff has a real time information for each patient available in the intensive care room. A starWireless Sensor Network is designed for collecting ECG signals . ATmega328 MCU in the Arduino Uno boardused for this purpose. Internet for things used For transferring ECG signals to the remote doctor, a Virtual PrivetNetwork is established to connect the nursing room computer and the doctor computer . So, the patientsinformation kept secure. Although the constructed network is tested for ECG monitoring, but it can be used tomonitor any other signals.


Article
Power Transformer Protection by Using Fuzzy Logic

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Abstract

Power transformer protective relay should block the tripping during magnetizing inrush and rapidlyoperate the tripping during internal faults. Recently, the frequency environment of power system has beenmade more complicated and the quantity of 2nd frequency component in inrush state has been decreasedbecause of the improvement of core steel. And then, traditional approaches will likely be maloperated inthe case of magnetizing inrush with low second harmonic component and internal faults with high secondharmonic component. This paper proposes a new relaying algorithm to enhance the fault detectionsensitivities of conventional techniques by using a fuzzy logic approach. The proposed fuzzy-basedrelaying algorithm consists of flux-differential current derivative curve, harmonic restraint, andpercentage differential characteristic curve. The proposed relaying was tested with MATLAB simulationsoftware and showed a fast and accurate trip operation.

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