Convex Optimization
On Distributed Fault-Tolerant Detection in Wireless Sensor Networks
IEEE Transactions on Computers
Sensing from the basement: a feasibility study of unobtrusive and low-cost home activity recognition
UIST '06 Proceedings of the 19th annual ACM symposium on User interface software and technology
PIPENETa wireless sensor network for pipeline monitoring
Proceedings of the 6th international conference on Information processing in sensor networks
A wireless sensor network for structural health monitoring: performance and experience
EmNets '05 Proceedings of the 2nd IEEE workshop on Embedded Networked Sensors
UbiComp '07 Proceedings of the 9th international conference on Ubiquitous computing
HydroSense: infrastructure-mediated single-point sensing of whole-home water activity
Proceedings of the 11th international conference on Ubiquitous computing
ViridiScope: design and implementation of a fine grained power monitoring system for homes
Proceedings of the 11th international conference on Ubiquitous computing
PipeProbe: mapping hidden water pipelines
Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems
Blindly calibrating mobile sensors using piecewise linear functions
SECON'09 Proceedings of the 6th Annual IEEE communications society conference on Sensor, Mesh and Ad Hoc Communications and Networks
SensorScope: Application-specific sensor network for environmental monitoring
ACM Transactions on Sensor Networks (TOSN)
Cross currents: water scarcity and sustainable CHI
CHI '10 Extended Abstracts on Human Factors in Computing Systems
Challenges in resource monitoring for residential spaces
Proceedings of the First ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings
PipeProbe: a mobile sensor droplet for mapping hidden pipeline
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
sMAP: a simple measurement and actuation profile for physical information
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Activity analysis based on low sample rate smart meters
Proceedings of the 17th ACM SIGKDD international conference on Knowledge discovery and data mining
A longitudinal study of pressure sensing to infer real-world water usage events in the home
Pervasive'11 Proceedings of the 9th international conference on Pervasive computing
Proceedings of the 9th ACM Conference on Embedded Networked Sensor Systems
GasSense: appliance-level, single-point sensing of gas activity in the home
Pervasive'10 Proceedings of the 8th international conference on Pervasive Computing
TriopusNet: automating wireless sensor network deployment and replacement in pipeline monitoring
Proceedings of the 11th international conference on Information Processing in Sensor Networks
Adaptive calibration for fusion-based cyber-physical systems
ACM Transactions on Embedded Computing Systems (TECS)
A longitudinal study of vibration-based water flow sensing
ACM Transactions on Sensor Networks (TOSN)
BuildSys '12 Proceedings of the Fourth ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings
Hot water DJ: saving energy by pre-mixing hot water
BuildSys '12 Proceedings of the Fourth ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings
Mapping hidden water pipelines using a mobile sensor droplet
ACM Transactions on Sensor Networks (TOSN)
DoubleDip: leveraging thermoelectric harvesting for low power monitoring of sporadic water use
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
WaterSense: water flow disaggregation using motion sensors
Proceedings of the Third ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Buildings
FixtureFinder: discovering the existence of electrical and water fixtures
Proceedings of the 12th international conference on Information processing in sensor networks
Analysis of advanced meter infrastructure data of water consumption in apartment buildings
Proceedings of the 19th ACM SIGKDD international conference on Knowledge discovery and data mining
Circulo: Saving Energy with Just-In-Time Hot Water Recirculation
Proceedings of the 5th ACM Workshop on Embedded Systems For Energy-Efficient Buildings
The Energy-Water Nexus in Campuses
Proceedings of the 5th ACM Workshop on Embedded Systems For Energy-Efficient Buildings
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Water is nature's most precious resource and growing demand is pushing fresh water supplies to the brink of non-renewability. New technological and social initiatives that enhance conservation and reduce waste are needed. Providing consumers with fine-grained real-time information has yielded benefits in conservation of power and gasoline. Extending this philosophy to water conservation, we introduce a novel water monitoring system, NAWMS, that similarly empowers users. The goal of our work is to furnish users with an easy-to-install self-calibrating system that provides information on when, where, and how much water they are using. The system uses wireless vibration sensors attached to pipes and, thus, neither plumbing nor special expertise is necessary for its installation. By implementing a non-intrusive, autonomous, and adaptive system using commodity hardware, we believe it is cost-effective and widely deployable. NAWMS makes use of the existing household water flow meter, which is considered accurate, but lacks spatial granularity, and adds vibration sensors on individual water pipes to estimate the water flow to each individual outlet. Compensating for manufacturing, installation, and material variabilities requires calibration of these low cost sensors to achieve a reasonable level of accuracy. We have devised an adaptive auto-calibration procedure, which attempts to solve a two phase linear programming and mixed linear geometric programming problem. We show through experiments on a three pipe testbed that such a system is indeed feasible and adapts well to minimize error in the water usage estimate. We report an accuracy, over likely domestic flow-rate scenarios, with long-term stability and a mean absolute error of 7%.