In our paper we present a laboratory temperature measuring system that can be remotely accessed by Internet. The system is based on the DS18B20 and DS1822 digital temperature sensors controlled with the aid of a microcontroller board PCB80c552. The system is used to measure and monitor the temperature in different places inside a computer. Using a web browser we can remotely configure the operating mode of each temperature sensor as well as we can read measured temperature in each measuring point. Using this system student can learn: use of integrated temperature sensors, software implementation of a 1-Wire interface, distributed measurement systems based on 1-Wire interface, microcontroller based instrumentation, web based monitoring and control of measurement systems.

The paper deals with the problem of pointing out and then measuring the manufacturing defects (scratches and halos) of handmade satin glasses by an accurate, real-time and cheap method. A wavelet-based de-noising technique is used to obtain surface information about glasses under inspection. The proposed algorithm first obtains a two-dimensional wavelet transform of a high resolution image of the glass under inspection which, according to multi-resolution analysis, produces a suitable number of decomposition levels of the image, and then it carries out a thresholding operation on details. Finally, using the threshold levels estimated considering the present noise level, it assesses and characterizes the defects. The final aim of the work is the realization of an automatic and in-line computer vision system for glasses analysis; it must be able both to accurate inspection and to quality degree assessment of the final products as they come out from the production chain.

In the present paper, prototype architecture for a virtual stand for stepping motors converted as rotary encoder study is illustrated.

Symbolic Sensors can answer a query by a qualitative answer, using linguistic symbols instead of the usual numerical representation. Because there are no sensors with a built-in symbolic behaviour, the solution is to develop add-on modules for enhancing common sensors with such a set of features. These add-ons can be built either in software or in hardware. This paper focuses on the hardware solution and it aims to solve the lack of flexibility issue by using reconfigurable devices such as FPGAs. These devices allow dynamic reconfiguration and they provide the required flexibility for the entire system, without having a significant decrease in performance. The experiments conducted during the research prove that such a solution is efficient and reliable, thus being a serious alternative for the older solutions developed in software.

Paper deals with measurement of polarization properties of fibers in variable thermal field. Study of polarization is important from the polarization dispersion point of view for communication systems and also in the area of interferometric and polarization sensors or general interferometric measurements. Our contribution solves a temperature dependence of polarization in a relatively short part of different types of fibers, where additionally fluctuation of power between both polarization modes could affect. These results can be interesting in the application of fibers in distributed sensors, where partial segments of fiber could be affected by different temperature.