A Wireless Sensor Network for Long-term Monitoring of Aquatic Environments: Design and Implementation

Ong, Keat Ghee; Yang, Xiping; Mukherjee, Niloy; Wang, Haidong; Surender, Shrawan C.; Grimes, Craig A.

doi:10.1166/sl.2004.023

Cited by 15 publications

(4 citation statements)

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“…There are several state of the art autonomous acoustic recording devices built by various research institutes [ 20 – 23 ] and commercially available systems or other aquatic sensor networks [ 24 ]. However, they were either designed for ocean environment and applications (ocean noise or marine mammal detections), or did not meet our requirements for sampling frequency, portability and cost, or did not offer the flexibility of switching hydrophones and underwater sound sensors for different environments or underwater processes.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Underwater Sound Recording Device

Martinez

Myers

Carlson

et al. 2011

Sensors

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To monitor the underwater sound and pressure waves generated by anthropogenic activities such as underwater blasting and pile driving, an autonomous system was designed to record underwater acoustic signals. The underwater sound recording device (USR) allows for connections of two hydrophones or other dynamic pressure sensors, filters high frequency noise out of the collected signals, has a gain that can be independently set for each sensor, and allows for 2 h of data collection. Two versions of the USR were created: a submersible model deployable to a maximum depth of 300 m, and a watertight but not fully submersible model. Tests were performed on the USR in the laboratory using a data acquisition system to send single-frequency sinusoidal voltages directly to each component. These tests verified that the device operates as designed and performs as well as larger commercially available data acquisition systems, which are not suited for field use. On average, the designed gain values differed from the actual measured gain values by about 0.35 dB. A prototype of the device was used in a case study to measure blast pressures while investigating the effect of underwater rock blasting on juvenile Chinook salmon and rainbow trout. In the case study, maximum positive pressure from the blast was found to be significantly correlated with frequency of injury for individual fish. The case study also demonstrated that the device withstood operation in harsh environments, making it a valuable tool for collecting field measurements.

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Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Underwater Sound Recording Device

Martinez

Myers

Carlson

et al. 2011

Sensors

View full text Add to dashboard Cite

show abstract

“…For underwater communications, however, RF waves are inappropriate due to several reasons such as high dissemination rate, immense propagation power [ 10 , 11 ], and high exposure to communication interference due to low and restricted transmission bandwidth [ 12 , 13 ]. Therefore, efforts have been undertaken to apply acoustic waves as a means for underwater sensor network communication [ 12 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

“…Also, pulsing an acoustic signal underwater requires more transmission power than for terrestrial RF signals [ 4 ]. Lastly, due to the high bit error rate, a greater amount of data transmission incurs a proportionally large amount of data failures [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

A Query Result Merging Scheme for Providing Energy Efficiency in Underwater Sensor Networks

Park

2011

Sensors

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Underwater sensor networks are emerging as a promising distributed data management system for various applications in underwater environments, despite their limited accessibility and restricted energy capacity. With the aid of recent developments in ubiquitous data computing, an increasing number of users are expected to overcome low accessibility by applying queries to underwater sensor networks. However, when multiple users send queries to an underwater sensor network in a disorganized manner, it may incur lethal energy waste and problematic network traffic. The current query management mechanisms cannot effectively deal with this matter due to their limited applicability and unrealistic assumptions. In this paper, a novel query management scheme involving query result merging is proposed for underwater sensor networks. The mechanism is based on a relational database model and is adjusted to the practical restrictions affecting underwater communication environments. Network simulations will prove that the scheme becomes more efficient with a greater number of queries and a smaller period range.

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“…Of especial interest are the materials with high sensitivity and adaptability [5]. In this context, great attention is being given to the selfassembling systems capable of hierarchical ordering from the nano-to mesoscopic level [6], which may lead to elaboration of intelligent, in particular, optically sensing, materials responsive to weak external factors such as temperature, irradiation, pH, pollutants in the environment, etc.…”

Section: Introductionmentioning

confidence: 99%

Nanocarbon composite materials with optical response on radioactive waste

Vantsyan

Popova

Karpuzova

et al. 2011

Materials Characterisation V

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Nanocarbon materials have numerous unique features -high porosity, large specific surface area, chemical inertness, radiation stability, etc. We applied nanocarbon/nanodiamond and silicon carbidecomposites as matrix for optical chemochips construction. Composite elements consist of porous nanocarbon substrate with specific chromophores introduced to nanosize pores and siliconorganic coating. Similar multicomponent composition has a response to radiation, in particular, -irradiation. By using diarylethenes as sensitive chromophores, their electronic and/or luminescent spectra data may be applied for doze power detection. Quantum chemistry methods, computer simulation were considered for optimal design of nanocarbon/organic chromophore hybrid. Experimental data and modeling have shown that diarylethenes are able to change color under -irradiation in molecular crystal phase only. Weak interactions (inter-, intramolecular and binding with hydrogen-containing walls in pores) play key role under irradiation. Induced self-organization in limited volume is considered. SWAXS and AFM data are discussed. Nanodiamond composition possesses luminescent response to -, -and -irradiation. Siliconorganic polymer and SiC composition are neutral to irradiation, they are stable in extreme conditions. Application of composite elements with optical sensing as multifunctional chemochip fragment for atmospheric media monitoring is discussed.

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A Wireless Sensor Network for Long-term Monitoring of Aquatic Environments: Design and Implementation

Cited by 15 publications

References 0 publications

Design and Implementation of an Underwater Sound Recording Device

Design and Implementation of an Underwater Sound Recording Device

A Query Result Merging Scheme for Providing Energy Efficiency in Underwater Sensor Networks

Nanocarbon composite materials with optical response on radioactive waste

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