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For a wide range of applications in industry, it is sometimes necessary to perform acoustic source localization. In this paper, a passive sound localization and classification system is designed and implemented. Each sensor consists of a microphone array which is used to detect the direction-of-arrival (DoA) of an acoustic signal. Multiple DoA sensors can be combined to form a wireless sensor network...
Localization is important for a wide range of industries and applications. In underground mining, for instance, it is helpful to know the miners' locations, particularly in emergency situations. One way this can be achieved is by using ultrasonic based localization. This paper presents the design and implementation of a wireless sensor network which can be deployed in underground mines to perform...
Hazardous environments at the workplace are a significant contributor to injuries due to accidents as well as chronic diseases. There are many occupational health and safety (OHS) systems, but they are costly or not flexible. This paper presents a low-cost OHS. It consists of various sensors that can be used to monitor whether a safety helmet is being worn, the worker is mobile and safety boots are...
This paper describes the work carried out on the implementation of a wireless sensor network that was created for a data center using the 6LoWPAN communication protocol which monitors power consumption readings at various nodes in the system. A direct current (DC) network controller was designed to distribute DC energy through the system and provide power to a data center load in future buildings...
This paper presents the design of a smart geyser controller that can relay information between two functional units making use of low power IEEE 802.15.4 radios, with the objective of lowering the power consumption of a household geyser. The first operational unit measures the environmental data of the geyser, i.e. water temperature, voltage, current and power measurements, and also switches the geyser...
With the world progressively heading towards an energy crisis, renewable energy sources and technologies have become the focus of research. Harvesting the sun's energy through solar thermal power plants (STPPs) is an attractive alternative to the use of energy supplied through the grid. However, installation and maintenance of cabling for communication and control of a heliostat array for STPPs is...
Water is a vital component in our daily lives, and a precious resource to human race. This paper describes the work carried out on the design of a water management system that can log pressure and pH readings wirelessly and determine if there is a water leak within the pipe system or if the pH levels of the water are safe enough for human consumption. A pipe monitoring system was designed, implemented...
The demand for energy is increasing and the need to use renewable sources is rising. One of the key enabling technologies in this domain is smart grid. Smart grid enables the use of renewable energy sources through wind generators or solar panels, for instance. These distributed sources of energy have to be efficiently integrated into the grid through a simple and efficient scheme to synchronize the...
More than 50 billion devices are estimated to be connected to the Internet by 2020. Incompatibility of devices and protocols (usually proprietary devices and protocols) are one of the major hurdles to be overcome to realise the Internet of Things (IoT) vision. IoT devices are typically constrained devices and this creates dependencies between the hardware, software and protocols used in the device...
The authors of this paper explore the use of IPv6 over Low power Wireless Personal Area Networks (6LoWPAN), IPv6 Routing Protocol for Low power and Lossy Networks (RPL) and Constrained Application Protocol (CoAP) as a possible solution for realising the Internet of Things (IOT) vision in Industrial Wireless Sensor Networks (IWSNs), The aim of this paper is to investigate the feasibility of using Internet...
The use of commercial off-the-shelf components for implementing Internet of Things devices has become a common practice amongst researchers and solution providers. IOT solutions, based on the Raspberry Pi, BeagleBone and BeagleBone Black, offer cost effective, versatile and uncomplicated platforms for rapid application development. The devices are treated as black box devices and little work has been...
The paper identifies several key challenges that were experienced by the authors while doing research and development work relating to wireless sensor networks. Some key issues include complexity, outdated platform level designs, lack of flexibility and hardware expenses. The challenges were addressed by designing a new customised mote platform, using a modular design approach. The platform supports...
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