scholarly journals Development of a Wireless Corrosion Detection System for Steel-Framed Structures Using Pulsed Eddy Currents

Sensors ◽  
2021 ◽  
Vol 21 (24) ◽  
pp. 8199
Author(s):  
Namhoon Ha ◽  
Han-Seung Lee ◽  
Songjun Lee

Structural health monitoring (SHM) can be more efficient with the application of a wireless sensor network (WSN). However, the hardware that makes up this system should have sufficient performance to sample the data collected from the sensor in real-time situations. High-performance hardware can be used for this purpose, but is not suitable in this application because of its relatively high power consumption, high cost, large size, and so on. In this paper, an optimal remote monitoring system platform for SHM is proposed based on pulsed eddy current (PEC) that is utilized for measuring the corrosion of a steel-framed construction. A circuit to delay the PEC response based on the resistance–inductance–capacitance (RLC) combination was designed for data sampling to utilize the conventional hardware of WSN for SHM, and this approach was verified by simulations and experiments. Especially, the importance of configuring sensing modules and the WSN for remote monitoring were studied, and the PEC responses caused by the corrosion of a specimen made with steel were able to be sampled remotely using the proposed system. Therefore, we present a remote SHM system platform for diagnosing the corrosion condition of a building with a steel structure, and proving its viability with experiments.

2021 ◽  
Vol 10 (4) ◽  
pp. 1968-1978
Author(s):  
A. H. M. Almawgani ◽  
Turki Alsuwian ◽  
Adam R. H. Alhawari ◽  
A. N. Alhuthari ◽  
M. A. Alhezabr ◽  
...  

This paper presents a smart and efficient car-parking detection system. The proposed system is comprised of two cameras connected to a mobile system that is devised with Arduino, four DC motors, and PIR sensor placed strategically to monitor parking space, especially within its painted rectangular lines of each parking lot. The mobile monitoring system is automatically responsive to any move they detected as vehicles within the parking space along the rows of parking lots. Once detected, the captured images are processed using the MATLAB software. Any improperly parked cars detected, the cameras will identify their plate numbers, and snap and record it in a database. The designed prototype of the proposed system was tested in five presumed cases. In each case, ten images were processed, thus 50 images were eventually obtained. Out of the 50 images, 48 images corresponded to correct detection whereas the other two images corresponded to wrong detection. Accordingly, the efficiency rate of the proposed smart car-parking monitoring system is 96%. This system offers suitable solution in assisting drivers to park properly within each parking lot and owners of parking area to keep it organized via remote monitoring system.


2013 ◽  
Vol 644 ◽  
pp. 60-63 ◽  
Author(s):  
Kun Fu Li ◽  
Wei Ping Luo

According to the requirements of the PV station remote monitoring system, such as big information flow, far distance transmission, high-performance, this article has designed a remote PV station monitoring system based on CAN bus and GPRS with mechanical properties. After lucubrated CAN bus and GPRS communication technology, this article details the hardware circuit of the slave computer, the communication protocol of CAN bus and the design of communication network. It has solved the problems that bad real-time, low degree of automation, few nodes can be accommodated, weak anti-interference ability which exits in the past design of PV station remote monitoring system.


Author(s):  
Nguyen Trong Tuyen ◽  
Tran Trong Huu ◽  
Nguyen Mau Thach ◽  
Zafar M. Yuldashev

Continuous and steady running of health status remote monitoring systems is essential not to omit episodes of acute exacerbation of chronic disease. Running time of such systems is largely determined by performance capabilities of the patient's wearable system elements. To ensure its long-term operation and efficient performance, the monitoring system must have multilayered structure with the elements realizing recording and picking off biomedical signals, signal processing and analysis, estimation of patient current condition, dynamics of the disease and its prognosis. For this purpose, it is necessary to use smart monitoring algorithms. A specific feature of such algorithms is change of the number of channels used for biomedical signal recording and processing according to the change of patient’s condition. To detect the exacerbation first symptoms by means of the patient's wearable computer, additional channels are activated for recording biomedical signals used to evaluate the expanded complex of diagnostically significant parameters of the disease and their integration when specifying the patient's condition. The system and intelligent monitoring algorithm is tested with the use of heart rate remote control and atrial fibrillation episode detection system. The testing results of the developed system and algorithm are discussed.


2014 ◽  
Vol 530-531 ◽  
pp. 1108-1111
Author(s):  
Zhi Jun Guo ◽  
Xian Feng Yu

Through the overall analysis to the irrigation water management, according to the characteristics of data acquisition and monitoring, the author designed and completed a monitoring system which based on the wireless network GPRS. This system uses a SQL serve 2000 database and Delphi7 programming software, which includes several functions, such as the monitoring data acquisition, processing, voice communication and man-machine interface and so on. At the same time, this system adapted a kind of low power consumption and high performance embedded processors and GPRS module, carrying out the acquisition transmission control integration, solving the water supply engineering every link of the monitoring data acquisition and monitoring. It also provides some reliable solutions for the remote monitoring for irrigation water management.


Author(s):  
G. W. Hacker ◽  
I. Zehbe ◽  
J. Hainfeld ◽  
A.-H. Graf ◽  
C. Hauser-Kronberger ◽  
...  

In situ hybridization (ISH) with biotin-labeled probes is increasingly used in histology, histopathology and molecular biology, to detect genetic nucleic acid sequences of interest, such as viruses, genetic alterations and peptide-/protein-encoding messenger RNA (mRNA). In situ polymerase chain reaction (PCR) (PCR in situ hybridization = PISH) and the new in situ self-sustained sequence replication-based amplification (3SR) method even allow the detection of single copies of DNA or RNA in cytological and histological material. However, there is a number of considerable problems with the in situ PCR methods available today: False positives due to mis-priming of DNA breakdown products contained in several types of cells causing non-specific incorporation of label in direct methods, and re-diffusion artefacts of amplicons into previously negative cells have been observed. To avoid these problems, super-sensitive ISH procedures can be used, and it is well known that the sensitivity and outcome of these methods partially depend on the detection system used.


2018 ◽  
Vol 14 (01) ◽  
pp. 4
Author(s):  
Wang Weidong

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.


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