Physical topology optimization of infrastructure health monitoring sensor network for high-speed rail

Due to its efficiency in end-to-end communication, wireless sensor network based on the Internet protocol (IP-WSN) is used for monitoring purposes. Nowadays, the concerned agencies are giving their highest priority to monitor its critical infrastructure. Infrastructure health monitoring is the measure of estimating the state of infrastructure health or detecting the changes in structures that affect its performance. The traditional approach to monitor the infrastructure health is done by using centralized data acquisition hub. Installation and commissioning of these systems represent significant concerns, thus moving toward IP-WSN. As cost effectiveness and energy efficiency are major concerns, our proposed approach is to reduce the amount of overhead while keeping the infrastructure health monitoring system accurate. Our contribution in this paper is to reduce the amount of data to be transmitted by compressing the payload of the packets. Thus, we have proposed a double compression algorithm. In this way, the capacity of the sensor node will be increased since less time will be taken to transmit data between the intermediate node as well as the coordinator node. As a consequence, it will also extend the lifetime of the battery.

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A Bluetooth Based Sensor Network for Civil Infrastructure Health Monitoring

Wireless Networks ◽

10.1023/b:wine.0000028544.49457.eb ◽

2004 ◽

Vol 10 (4) ◽

pp. 401-412 ◽

Cited By ~ 26

Author(s):

Vipin Mehta ◽

Magda El Zarki

Keyword(s):

Sensor Network ◽

Health Monitoring ◽

Civil Infrastructure ◽

Infrastructure Health

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Smart Structural Health Monitoring Based on Detecting Picometer-Scale Wavelength Shift of Fiber Bragg Grating

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.562-565.1346 ◽

2013 ◽

Vol 562-565 ◽

pp. 1346-1352

Author(s):

Jun Jie Bai ◽

Jian Xing Li ◽

Jun Zhang ◽

Xiao Yun Zhang ◽

Le Wang ◽

...

Keyword(s):

Fiber Bragg Grating ◽

Sensor Network ◽

Health Monitoring ◽

High Speed ◽

Smart Structure ◽

Comb Filter ◽

Bragg Grating ◽

Wavelength Shift ◽

Center Wavelength ◽

Fbg Sensor

The real-time monitoring technologies of smart civil structure based on detecting picometer-scale wavelength shift of fiber Bragg grating (FBG), including the wavelength demodulation technology of FBG, are researched extensively at home and abroad. In the paper, using the technologies of wavelength division multiplex (WDM) and time division multiplex (TDM), fiber Bragg grating (FBG) sensor network was built for monitoring smart structure health condition. Based on SOPC (System on Programmable Chip) technology and fiber comb filter, a high-speed and high-precision wavelength demodulation scheme of FBG sensor network was proposed. The optical system and hardware circuit for demodulation system were designed specifically. To improve the accuracy of demodulation system of FBG, a constant temperature channel of the demodulation system connected with a fiber comb filter, which offered reference points to calibrate the Bragg grating center wavelength. Based on 32-bit soft-core processor NoisⅡ, the embedded system collected and processed the photoelectric signal voltage transformed to rectangular voltage pulse. The upper computer displayed dynamically the FBG wavelength demodulation process and calibrated the Bragg grating center wavelength. The experiments of FBG wavelength demodulation and health monitoring of smart structural embedded fiber Bragg gratings were done. Experimental results show that, the FBG wavelength demodulation method can be used to demodulate the FBG wavelength with high speed and high precision (± 2 pm), which can be used extensively in large-scale multipoint monitor engineering, and the strains of the smart structure can be measured accurately.

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High-speed rail safety monitoring system based on ZigBee wireless sensor network

Advances in Services Science and Services Information Technology ◽

10.2495/sssit130011 ◽

2014 ◽

Author(s):

Yu Chen ◽

Dingyi Mao

Keyword(s):

Wireless Sensor Network ◽

Sensor Network ◽

Monitoring System ◽

High Speed ◽

Safety Monitoring ◽

Wireless Sensor ◽

High Speed Rail ◽

Safety Monitoring System

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Wireless Sensor Networks of Infrastructure Health Monitoring for High-Speed Railway

Shock and Vibration ◽

10.1155/2016/5194324 ◽

2016 ◽

Vol 2016 ◽

pp. 1-11

Author(s):

Haijian Li ◽

Limin Jia ◽

Yigang Zhang ◽

Chengkun Liu ◽

Jian Rong

Keyword(s):

Health Monitoring ◽

High Speed ◽

Lower Layer ◽

Access Network ◽

Rapid Expansion ◽

Transport Infrastructure ◽

Frame Structure ◽

Wireless Sensor ◽

Infrastructure Health ◽

Short Network

High-speed railways (HSRs) have been widely deployed all over the world in recent years and China has entered an era with both high investments and rapid expansion of HSR transport infrastructure. One of the most challenging issues is how to keep the security and safety of millions of HSR infrastructures. Meanwhile, the emerging sensing and wireless sensor network (WSN) technologies for infrastructure health monitoring (IHM) are being substituted for traditional tethered monitoring systems. This paper presents a two-layer architecture of WSN which will be appropriate for infrastructure health monitoring of HSR. The upper layer is named as tree access network and the lower layer is called star detection network. By adapting to the special characteristics of IHM network, we design a short network address and an optimized communication frame structure, which can satisfy the actual requirements and special characteristics of the IHM network. In order to implement a better transmission performance, we propose a novel transmission power based method which adopts the knowledge update mechanism to detect the optimization result. In the end, the details of address assignment and network construction are discussed, and the effectiveness of the proposed method is validated by a practical instance.

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