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This paper presents an efficient monitoring solution for greenhouses. The solution implements the Wireless Sensor Network (WSN) monitoring system and then expands the monitoring concept to an Internet of Things (IoT) solution, by employing 3G access, web services, database and a web interface for user interaction. The main advantage of this modular monitoring system relies on the fact that the End-Devices...
Wireless Sensor Network (WSN) is an emerging technology which has been employed recently in various applications such as healthcare systems, environmental monitoring, military and industrial applications. This is due to the easy deployment and (re)configuration of the sensor nodes in the environment. It also has the potential of being integrated into the distributed manufacturing systems particularly...
The application of Wireless Sensor Networks (WSN) in industrial environments, with strict requirements of latency and data integrity, is a challenging topic for which IEEE 802.15.4e provides some MAC layers targeted to fulfill these requirements. While much work has been done to reduce the worst-case latency, little effort has been put in analyzing the setup procedures of the network, which can be...
The Internet of Things (IoT) paradigm envisions an interconnected world where things can communicate with each other, transmit state information and execute smart tasks. The number of devices connected in Internet has been growing exponentially in the past years and the Machine-to-Machine (M2M) plays a major role in enabling IoT paradigm while it is expected that in the near future billion of devices...
Wireless Sensor Networks (WSNs) are widely installed during the last years for monitoring multiple parameters of interest over distributed areas in the environment, buildings and industries. The WSN nodes are frequently installed in geographically remote areas. Thus, they are power-supplied by renewable energy sources and a DC-DC power converter is employed for interfacing the generated energy to...
Mobility support is one of the main requirements in current wireless sensor networks (WSN), as WSN technology becomes mature and its range of applications gets wider. Due to the very nature of WSNs, along with their use in all sorts of Internet of Things (IoT) scenarios, it is frequent that sensor nodes, or even groups of sensor nodes, need to change their wireless point of attachment without losing...
The usage and deployment of Wireless Body Sensor Networks (WBSN) as a part of Cyber-Physical Systems (CPS) are rapidly increasing in many different real-time monitoring and applications. This emergent network has strong Quality of Service (QoS) requirements and, as it is a recent field of research, it is not yet clear if these requirements can be guaranteed in severe fading and external RF interference...
This paper presents a new low-voltage low-power CMOS temperature sensor, targeting long-life autonomous portable applications. The frequency-output sensor includes a novel VDD-compensation strategy, achieving supply voltage independence. Results for a 0.18 μm CMOS implementation show a linear response over a wide range of (−40, +120 ºC), with a sensitivity of 546 Hz/ºC and a power consumption of 2...
In this paper, a wireless interrogation method based on pulse-echo technique is demonstrated for passive resonator based sensors. This technique can be employed for the measurement of time varying measurands. The measurand studied in this paper is a 60 Hz AC electric potential that varies the resonance frequency of a passive, resonator sensor. The resonance frequency shifts in response to applied...
The continuously rising demand for electricity has prompted governments and industries to research more effective energy management systems. The Internet of Things paradigm is a valuable add-on for controlling and managing the energy appliances such as Plug-in Electrical Vehicles (PEV) charging stations. In this paper, we present a Demand Response implementation for PEV charging stations able to use...
Energy harvesting technologies have brought a paradigm shift in the industrial automation sector by procreating self-powered wireless input/output (I/O) devices. Unfortunately, current wireless technologies for industrial applications, such as ISA100.11a and WirelessHART, are yet far from supporting harvester powered I/O devices. Although several works have been conducted to address the requirements...
Most communication companies in developing countries use diesel generators in addition to grid supply to power their base stations because the grid power supply is unreliable. Remote monitoring of these sites can reduce the amount of time spent on routine site visits especially for dieselrefills. This paper presents a design and implementation of a remote diesel-level monitoring system using wireless...
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...
This work introduces an indoor localization system for mobile robots using Time-of-Flight measurements between an ultrasound signal emitter mounted on the robot and ultrasonic sensors (anchors) mounted over the workspace of the robot. In the first part of the study a calibration method was proposed for Time-of-Flight measurement based localization systems. The influence of the anchor's position on...
The non-dispatchable, intermittent and unpredictable nature of photovoltaic energy has made its integration in power system very limited. This paper presents a system for monitoring, supervising and treatment of the information in real time applied to photovoltaic plants connected to the grid. Experimental results shows the usefulness of the system implemented for monitoring a grid-connected photovoltaic...
Wireless Sensor Networks continuously extend their practicability in real world applications and are passing their break-even to hit the consumer market. An increasing number of miniaturized wireless sensor nodes is acquirable, mostly intended to stream environmental data as well as tracking health with single node devices. A lack of distributed processing of sensor data within a cooperative network,...
Wireless sensor network (WSN) has become widely used in different applications. Fault detection of sensors is importance for maintaining a reliable WSN operation. And identification of faulty nodes in a WSN can be transformed into a pattern classification problem. In this paper, we introduce an effective label propagation procedure using semi-supervised local kernel density estimation. The proposed...
This paper proposes a novel architecture for a hierarchical Wireless Networked Control System (WNCS). It consists of three cascaded workcells each containing 30 sensors, 30 actuators and one controller. The wireless communication protocol used is IEEE 802.11g with multicasting. The hierarchy of the system is such that the lowest level is that of the sensors and actuators, the intermediate level is...
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