Jose Polo

Design of a low-cost Wireless Sensor Network with UAV mobile node for agricultural applications

A sensor network has been developed to be used in extensive fields.Nodes are scattered around the field and cannot connect directly each other.A mobile node and an UAV have been designed to collect the data from the ground nodes.Main functions: send video and telemetry, transports a substance to be scattered.Total cost is around

IEEE 1451 Standard in 6LoWPAN Sensor Networks Using a Compact Physical-Layer Transducer Electronic Datasheet

900, low enough to introduce in any agricultural application. The aim of the present paper is to propose an agricultural environment monitoring server system utilizing a low-cost Wireless Sensor Network (WSN). Several sensor nodes are scattered in fields several kilometres in size, and we propose collection of the information stored in the nodes by a mobile node, or mule. To cover long distances in a short period of time, we use an unmanned aerial vehicle (UAV), which retrieves the data stored in the ground nodes. In addition, the UAV may be used to acquire additional information and to perform actions. Its elevated position allows observation of the field with a perspective that is useful for detecting changes affecting crops, such as pests, diseases, significant changes in soil moisture, drought or floods.

A Zigbee wireless sensor network compliant with the IEEE1451 standard

The adoption of the Internet Protocol version 6 (IPv6) networking in IEEE 802.15.4 sensor networks, using IEEE 1451 standardization, increases the interoperability of low-power smart-sensor devices over IP networks. This paper explains the design and implementation of the IPv6 sensor network over low-power wireless personal-area networks (6LoWPANs), and it uses the IEEE 1451 standard in IEEE 802.15.4 sensor networks. We propose the design of the 6LoWPAN physical-layer transducer electronic datasheet (PHY-TEDS) using data-type redefinition with the header compression. Each TEDS was analyzed in terms of memory size, obtaining a reduction of 48% in the PHY-TEDS and 25% in the meta-TEDS with respect to the standard definition. Finally, the IEEE 1451 commands are encapsulated in User Datagram Protocol datagrams to establish communication from the network capable application processor to the wireless transducer interface module in an environmental monitoring application.

Smart Lighting System ISO/IEC/IEEE 21451 Compatible

Wireless sensor networks are becoming very attractive for monitoring and control applications with smart sensor nodes. We present an implementation of a ZigBee wireless sensor network compliant with the IEEE1451 standard to improve the interoperability. This paper describes the message structure, commands and transactions. Furthermore, a proposal is presented to enhance the IEEE1451.5 ZigBee physical transducer electronic datasheet (PHY TEDS).

Understanding the IEEE 1451 standard in 6loWPAN sensor networks

Smart lighting systems go far beyond merely replacing lamps. These modern systems are now able to reproduce arbitrary spectra, color temperatures, and intensities and pivot on smart sensors and actuators incorporating information and communication technologies. This paper presents an interoperable smart lighting solution that combines heterogeneous lighting technologies enabling intelligent functions. The system can shift light intensity to increase visual comfort, and it is oriented toward human centric lighting studies. Moreover, this system follows the guidelines defined by the ISO/IEC/IEEE 21451 standards and ZigBee Light Link and also, it includes an additional transducer signal treatment service for artificial intelligence algorithms. Finally, a representational state transfer application allows us to test the interoperability and visualize energy savings in an office room.

Analysis of sigma-delta modulation techniques in low frequency DC-AC converters

The adoption of the IPv6 networking in IEEE 802.15.4 sensor networks, using IEEE 1451 standardization, increases the interoperability of low-power smart sensor devices in IP networks. This paper explains the design and implementation of IPv6 over Low power Wireless Personal Area Networks (6loWPAN) and it uses the IEEE 1451 standard over IEEE 802.15.4 sensor networks. We propose an application of API IEEE 1451 that uses web services to transmit IEEE 1451 commands between Network Capable Application Processor (NCAP) and Wireless Transducer Interface Module (WTIM) using the client-server architecture. In addition the design of 6loWPAN Physical Transducer Electronic Datasheet (PHY-TEDS) IEEE 1451.5 is explained. All TEDS were analyzed in terms of memory size. Each IEEE 1451 command is encapsulated in an UDP socket to establish NCAP-to-WTIM communication in an environmental monitoring application

Standardization for interoperable autonomous smart sensors in the future energy grid system

Sigma-delta modulators belong to the pulse code modulator (PCM) family and were first used in the communication field to digitise analogue signals. They have been used in power electronics since the early 1990s, particularly the first-order versions. In this paper, we show the effect of using sigma-delta modulators of different orders to control a 1-phase power inverter. We have also implemented these modulators in programmable logic devices-using VHDL language.

Tiny and autonomous IEEE1451 Sonic Anemometer to deploy in environmental Wireless Sensor Network

A hierarchy to reach the interoperability of future smart energy grid system is proposed by introducing compliant levels in a pyramidal model. Interoperability layers in this approach was modeled using a button-top approach, from a technical lovel and standards, such as ZigBee or 6loWPAN, with autonomous smart sensors to reach syntactic interoperability based on the IEEE 1451 standard. Also, the IEEE 1451 smart sensor model is defined taking into account a Network Capable Application Processor (NCAP), as coordinator node, and autonomous smart sensor nodes, Wireless Transducer Interface Module (WTIM) nodes, with sensing capabilities for cooperation with energy grid system, that employs the IEEE 1451 standard based on standard commands with header compression to decrease overall metadata information. Furthermore, this model could be extended in the future for small energy harvesting devices deployed in smart homes and energy utilities, to improve the efficiency, reliability and customer cost savings.

Analog signal processing in an AC electromagnetic flowmeter

Wind speed and direction are important parameters in the study of applied meteorology, for example, in weather prediction, air pollution, transport safety and structural safety. In this paper, we propose the design and deployment of an interoperable Smart Ultrasonic Anemometer that uses the IEEE 1451 standard and operates in a Wireless Sensor Network (WSN). This standard permits interoperability and introduces self-calibration and self-configuration tasks. We include power management considerations to calculate the energy consumption using a low power sampling protocol BMAC with variable duty cycle. Experimental tests are included to study the current consumption using an energy harvester with solar panel and super capacitors to increase the reliability and lifetime of the sensor node.

Intelligent composting assisted by a wireless sensing network

AC electromagnetic flowmeters yield a low-frequency signal whose amplitude is proportional to the average fluid velocity. Typically, the signal amplitude can be below 1 mV and suffers a strong interference from the coils that create the driving magnetic field. This paper provides a novel circuit design to amplify and demodulate the voltage picked up by the electrodes and to minimize interference. The amplifier includes a fully differential front end. The demodulation consists of synchronous rectification and sampling with zero-order hold followed by low-pass filtering. The result is a 0.25 mV/(m/s)/mT voltage insensitive to dc level shifts.