A Centralized, Unidirectional Wireless Communication System for Monitoring Sensor
Date
2003
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Degree Level
Masters
Abstract
There is a significant advantage in using a wireless wensor network in a mining environment because of the reduced installation and maintenance costs. The application considered here is the monitoring of the roof movement in underground mine rooms, which is used to provide a warning of a potential ceiling collapse. Since cables in the system are difficult to install, remove and are frequently damaged, the use of the wired monitoring system is limited in underground mines. Those problems can be solved by using a wireless sensor network to replace the wired system.
The focus of this research is to design and develop a wireless communication system that can be used to implement a wireless sensor network for monitoring roof movement in one mine room. Since a large number of portable, battery operated sensors are used, simple system architecture and low power consumption are required. Based on these criteria, the wireless communication system uses a unidirectional, centralized architecture combined with periodic monitoring to perform the monitoring task. The proposed system contains multiple Transmitter Units and one Receiver Unit. A protocol that is used to manage channel access is defined. The probability of collision for this protocol is analyzed and simulated. The prototype of the wireless communication system is implemented, which consists of a Transmitter Unit and a Receiver Unit. The protocols are implemented using reprogrammable devices to provide easy reconfiguration and update. The system prototype is tested in a laboratory, and the test results show that the defined data frame, containing a digitized input voltage, is transmitted and received correctly.
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Degree
Master of Science (M.Sc.)
Department
Electrical Engineering