Wireless Sensor Networks for Debris Flow Observation

Cho, C.Y.; Chou, Pai H.; Chung, Yeh‐Ching; King, Chung-Ta; Tsai, Ming‐Jer; Lee, B.J.; Chou, Tien-Yin

doi:10.1109/sahcn.2008.88

Cited by 14 publications

(16 citation statements)

References 5 publications

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“…7 The large volume of data associated with such a large geographical region facilitates flood forecasting and early warning. In a related study, Cho et al use wireless sensor networks to remotely monitor debris flow, 8 and have reported their technique to be very effective in monitoring a large area with an ad hoc network.…”

Section: Related Workmentioning

confidence: 99%

A low-cost wireless system for autonomous generation of road safety alerts

et al. 2009

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This paper describes an autonomous wireless system that generates road safety alerts, in the form of SMS and email messages, and sends them to motorists subscribed to the service. Drivers who regularly traverse a particular route are the main beneficiaries of the proposed system, which is intended for sparsely populated rural areas, where information available to drivers about road safety, especially bridge conditions, is very limited. At the heart of this system is the SmartBrick, a wireless system for remote structural health monitoring that has been presented in our previous work. Sensors on the SmartBrick network regularly collect data on water level, temperature, strain, and other parameters important to safety of a bridge. This information is stored on the device, and reported to a remote server over the GSM cellular infrastructure. The system generates alerts indicating hazardous road conditions when the data exceeds thresholds that can be remotely changed. The remote server and any number of designated authorities can be notified by email, FTP, and SMS. Drivers can view road conditions and subscribe to SMS and/or email alerts through a web page. The subscription-only form of alert generation has been deliberately selected to mitigate privacy concerns. The proposed system can significantly increase the safety of travel through rural areas. Real-time availability of information to transportation authorities and law enforcement officials facilitates early or proactive reaction to road hazards. Direct notification of drivers further increases the utility of the system in increasing the safety of the traveling public.

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Section: Related Workmentioning

confidence: 99%

A low-cost wireless system for autonomous generation of road safety alerts

et al. 2009

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“…Examples include debris flow monitoring systems [1], [2], agriculture systems [3], and flood warning systems [4]. All these applications rely on collecting enough samples to reconstruct the monitored signal.…”

Section: Introductionmentioning

confidence: 99%

“…According to the NyquistShannon Sampling Theorem [5], the amount of samples affects the fidelity in reconstructing the monitored signal, which in turn determines the quality of the monitoring application. Take debris flow monitoring as an example [1], [2]. The occurrence of debris flows causes vibration of the Earth's surface, which generates the underground sound of debris flow.…”

Section: Introductionmentioning

confidence: 99%

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Sample Assignment for Ensuring Sensing Quality and Balancing Energy in Wireless Sensor Networks

Chu

Lee

Huang

et al. 2011

IEEE Trans. Parallel Distrib. Syst.

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The quality of an environmental monitoring application can often be measured by the number of samples collected per unit time. This is to guarantee the reconstruction of the monitored signal. For applications that use wireless sensors for untethered monitoring at rural areas, the challenge is to satisfy the sensing quality while maintaining a long-running operation. Due to the spatial locality of the monitored signal and the oftentimes dense deployment of sensors, the samples taken by a set of nearby sensors can be regarded as equivalent. The problem is how to assign the sampling workload to this set of sensors and maintain a long-running operation. This requires taking account of the energy required to sample as well as to transmit and relay the data to the sink. Previous works on energy-aware routing are not applicable due to the added complexity of sampling assignment. In this paper, we formulate this problem as an optimization problem and present the optimal solution. We compare our algorithm with two commonly used sampling workload assignment algorithms for balancing energy consumption through PowerTOSSIM. The results show that our algorithm can achieve as much as a 25 percent improvement in the residual energy of the critical node, which is the node with the lowest residual energy among all nodes.

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“…Consider the problem of monitoring debris flows in the mountainous areas [8], [21]. For this, we need to install various sensors on the upper stream slopes of hazardous areas, where debris flow occurs frequently.…”

Section: Introductionmentioning

confidence: 99%

Building Ring-Like Overlays on Wireless Ad Hoc and Sensor Networks

Banerjee

King

2009

IEEE Trans. Parallel Distrib. Syst.

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In this paper, we discuss distributed algorithms to construct ring-like overlays over a subset of scattered nodes in a static, random wireless ad hoc and sensor network (WASN). A ring-like overlay consists of a unidirectional ring plus side paths or loops, in which the given subset of nodes may appear multiple times. Different from a Hamiltonian cycle, a ring-like overlay is easier to construct and more efficient to operate. Yet, it can support many useful control operations in WASN such as mutual exclusion, clock synchronization, and cluster management. Compared with other topologies, a ring-like overlay allows conflict-free two-way communications, supports node ordering, and provides cost-free status feedbacks of operations. In this paper, we first present a distributed algorithm to construct a proximity-aware ring-like overlay in WASN. We then show optimization techniques to adapt the primitive overlays to meet the various application requirements.

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Wireless Sensor Networks for Debris Flow Observation

Cited by 14 publications

References 5 publications

A low-cost wireless system for autonomous generation of road safety alerts

A low-cost wireless system for autonomous generation of road safety alerts

Sample Assignment for Ensuring Sensing Quality and Balancing Energy in Wireless Sensor Networks

Building Ring-Like Overlays on Wireless Ad Hoc and Sensor Networks

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