28,445 research outputs found
Dashbell: A Low-cost Smart Doorbell System for Home Use
Smart doorbells allow home owners to receive alerts when a visitor is at the
door, see who the guest is, and communicate with the visitor from a smart
device. They greatly improve people's life quality and contribute to the
evolution of smart homes. However, the commercial smart doorbells are quite
expensive, usually cost more than 190 US dollars, which is a substantial
impediment on the pervasiveness of smart doorbells. To solve this problem, we
introduce the Dashbell-a budget smart doorbell system for home use. It connects
a WiFi-enabled device, the Amazon Dash Button, to a network and enables the
home owner to answer the bell triggered by the dash button using a smartphone.
The Dashbell system also enables fast fault detection and diagnosis due to its
distributed framework.Comment: Accepted by IEEE PerCom 201
Design and Implementation of a Wireless Sensor Network for Smart Homes
Wireless sensor networks (WSNs) have become indispensable to the realization
of smart homes. The objective of this paper is to develop such a WSN that can
be used to construct smart home systems. The focus is on the design and
implementation of the wireless sensor node and the coordinator based on ZigBee
technology. A monitoring system is built by taking advantage of the GPRS
network. To support multi-hop communications, an improved routing algorithm
based on the Dijkstra algorithm is presented. Preliminary simulations have been
conducted to evaluate the performance of the algorithm.Comment: International Workshop on Mobile Cyber-Physical Systems (MobiCPS
2010), in conjunction with UIC2010, IEEE, Xi'an, China, 26 - 29 October, 201
HVAC SYSTEM REMOTE MONITORING AND DIAGNOSIS
A monitoring system for an HVAC system of a building includes a monitoring server located remotely from the building. The monitoring server receives, from a device installed at the building, (i) time-domain current data based on a measured aggregate current supplied to a plurality of components of the HVAC system, and (ii) data based on frequency-domain current data of the measured aggregate current. Based on the received data, the monitoring server accesses (i) whether a failure has occurred in a first com ponent of the plurality of components and (ii) generates a preliminary advisory in response to determining that the failure has occurred. The monitoring server compares the preliminary advisory to a threshold value based on data stored from prior advisories. If the preliminary advisory is on a first side of the threshold value, the monitoring server provides the preliminary advisory as a first advisory to a technician for review
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