scholarly journals Continuous monitoring of the health status of cement-based structures: electrical impedance measurements and remote monitoring solutions

ACTA IMEKO ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 132
Author(s):  
Nicola Giulietti ◽  
Paolo Chiariotti ◽  
Gloria Cosoli ◽  
Giovanni Giacometti ◽  
Luca Violini ◽  
...  
Keyword(s):  
Remote Monitoring ◽  
Continuous Monitoring ◽  
Electrical Impedance ◽  
Signal To Noise Ratio ◽  
Electrode Arrays ◽  
Material Interface ◽  
Analog Device ◽  
Impedance Measurements ◽  
Distributed Sensor ◽  
Remote Monitoring System

<p class="Abstract">The continuous monitoring of cement-based structures and infrastructures is fundamental to optimize their service life and reduce maintenance costs. In the framework of the EnDurCrete project (GA no. 760639), a remote monitoring system based on electrical impedance measurements was developed. Electrical impedance is measured according to the Wenner’s method, using 4-electrode arrays embedded in concrete during casting, selecting alternating current as excitation, to avoid the polarization of both electrode/material interface and of material itself. With this measurement, it is possible to promptly identify events related to contaminants ingress or damages (e.g. cracks formation). Conductive additions are included in some elements to enhance signal-to-noise ratio, as well as the self-sensing properties of concrete. Specifically, a distributed sensor network was implemented<span style="text-decoration: line-through;">,</span> consisting of measurement nodes installed in the elements to be monitored, then connected to a central hub (RS-232 protocol). Nodes are realized with an embedded unit for electrical impedance measurements (EVAL-AD5940BIOZ board with AD5940 chip, by Analog Device) and a digital thermometer (DS18B20 by Maxim Integrated), enclosed in cabinets filled with an IP68 gel against moist-related problems. Data are available on a Cloud through Wi-Fi network or LTE modem, hence can be accessed remotely via a use-friendly multi-platform interface.</p>

Development of a ECG remote monitoring system

2019 ◽  
pp. 312-320
Author(s):  
AKG Cazaes ◽  
NY Kim ◽  
Adriana DM Del Monaco
Keyword(s):  
Monitoring System ◽  
Remote Monitoring ◽  
Continuous Monitoring ◽  
Cardiac Activity ◽  
Signal Acquisition ◽  
Android Application ◽  
Remote Monitoring System ◽  
Ecg Signals ◽  
Electrocardiogram Signals ◽  
Medical Clinics

The continuous monitoring of cardiac activity using conventional electrocardiography systems restricts signals acquisition to specific locations such as hospitals and medical clinics, and Holters systems don’t transmit the information about the electrocardiogram to the doctor and don’t react if the patient suffers from a cardiac abnormality, they only record the information. Portable remote systems have shown to provide mobility and comfort to the patient by allowing signals acquisition anywhere. This paper shows a remote monitoring system of the cardiac activity capable of performing the acquisition of ECG signals using a smartphone having Android, Bluetooth® communication and 3G technology for processing and visualizing ECG signals. The designed system is battery powered and three electrodes are attached to the patient’s chest to obtain the signals. It was developed a low consumption electronic circuit for acquiring and conditioning these signals using instrumentation and operational amplifiers. The processed ECG signal is then digitalized by an Arduino Nano, and transmitted by Bluetooth from Arduino to the patient’s smartphone so it can be sent to a workstation through 3G technology where the electrocardiogram may be analyzed by a physician. The results obtained on the tests performed validate the developed prototype regarding the acquired ECG signals in the oscilloscope and the developed Android application, which were compared with the ECG signals obtained using a conventional electrocardiography system. The proposed system aims to perform signal acquisition and transmission independent of time and the patient’s location, allow early diagnosis of cardiovascular diseases, reduce the number of the doctor’s visits required, besides providing a device more comfortable to the patient during the monitoring of electrocardiogram signals while performing daily activities.

scholarly journals A Remote Monitoring System of Logistics Carrier Based on Wireless Sensor Network

2018 ◽  
Vol 14 (01) ◽  
pp. 4
Author(s):  
Wang Weidong
Keyword(s):  
Wireless Sensor Network ◽  
Real Time ◽  
Sensor Network ◽  
Monitoring System ◽  
Remote Monitoring ◽  
Monitoring Network ◽  
Sensor Nodes ◽  
Wireless Sensor ◽  
Remote Monitoring System ◽  
Monitoring Center

To improve the efficiency of the remote monitoring system for logistics transportation, we proposed a remote monitoring system based on wireless sensor network and GPRS communication. The system can collect information from the wireless sensor network and transmit the information to the ZigBee interpreter. The monitoring system mainly includes the following parts: Car terminal, GPRS transmission network and monitoring center. Car terminal mainly consists by the Zigbee microcontroller and peripherals, wireless sensor nodes, RFID reader, GPRS wireless communication module composed of a micro-wireless monitoring network. The information collected by the sensor communicates through the GPRS and the monitoring center on the network coordinator, sends the collected information to the monitoring center, and the monitoring center realizes the information of the logistics vehicle in real time. The system has high applicability, meets the design requirements in the real-time acquisition and information transmission of the information of the logistics transport vehicles and goods, and realizes the function of remote monitoring.

A 4-tiers architecture for mobile WBAN based health remote monitoring system

2017 ◽  
Vol 24 (6) ◽  
pp. 2179-2190 ◽  
Author(s):  
Audace Manirabona ◽  
Lamia Chaari Fourati
Keyword(s):  
Monitoring System ◽  
Remote Monitoring ◽  
Remote Monitoring System
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