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In this paper the problem of illumination control in a lighting system with networked lighting devices is examined. The luminaries have fluorescent light sources dimmable by a local controller. The optimal dimming values are calculated according to the user and legal requirements for illuminance of different workspaces and their actual illumination levels are measured by light sensors. A closedloop lighting device control algorithm is used for obtaining the set illumination values. So a distributed and energy optimised illumination control with the use of daylight can be effectively implemented. The proposed approach is evaluated in lecture rooms and office environments. [ABSTRACT FROM AUTHOR]

Thanks to miniaturization of the sensors as well as developments in the realm of Wireless Sensor Networks (WSN), the wireless technologies are becoming integral to a number of applications, including environmental monitoring. This paper presents the design and implementation of ZigBee enabled wireless data acquisition system for monitoring of temperature, relative humidity and illuminance. The presented system collects the signals of a number of sensors using the National Instruments' gateway and WSN modules. Finally system interface is designed on the graphical programming software platform. [ABSTRACT FROM AUTHOR]

For test engineers, device developers and manufacturers, the new generation of Source-Measure Units (SMUs) can provide unique combination of sourcing and measuring instruments with either power and precision. This paper discuss ways to combine virtual techniques with multiple SMU channels from modular instruments to achieve voltage and current levels that are higher than the published direct current and voltage specifications of a single unit. In addition the examples discussed here show that by using instrument driver and graphical programming environment, the functionality of SMU can be extended. [ABSTRACT FROM AUTHOR]

Air conditioning in buildings is vital for people who spend much of the day indoors. The climate control industry views indoor air quality as a measure of temperature, humidity, and amount of volatile organic compounds. This paper introduces the concept of a Wi-Fi based measurement system that is tiny and low cost and works on battery power. Sensors for measurement of temperature, humidity, absolute pressure and air quality are mounted on the board. The node is able to read sensors and send data to the network by using an IP-based application protocol. [ABSTRACT FROM AUTHOR]

This paper presents a power monitoring system that allows analyzing all phenomena related to power quality. The objective is to describe some power quality measurements and analyses that are better served by monitoring with multifunctional data acquisition systems rather than dedicated power quality analyzers. Proposed system is flexible and open to changes and improvements. Measurements which are discussed include three phase voltages, currents and their phasors, active, apparent and reactive powers, power factor and frequency. [ABSTRACT FROM AUTHOR]

Development of a simple and cost-effective system dedicated for optoelectronic device characterization is reported in present paper. The system consists of low-cost data acquisition module and graphical programming environment. Designed with education in mind, the presented system is a comprehensive tool for teaching the base characteristics of optoelectronic devices. [ABSTRACT FROM AUTHOR]

Three-phase power measurement and analysis has always been regarded as complex and expensive. In order to monitor power supply and power quality from a distance is very important to establish capabilities for remote access to measurement system. This paper proposes a low cost power parameter measuring system based on networked power transducers, graphical programming environment, and DataSocket transfer protocol for remote access via Internet. The various electrical parameters can be monitored in graphical user interface which is developed using LabVIEW. [ABSTRACT FROM AUTHOR]