The paper deals with the problem of the angular vibration sensor calibration. As a reference signal is produced by an incremental rotary encoder, which is a source of pulses. The pulse string determines the encoder rotation angle. The non-uniformity in the pulse distribution with respect to the rotation angle results in an error in determining the shaft rotation angle. The main topic of the paper is focused at the comparison of the encoder pair intended to employ for calibration of the Laser torsional vibration meter (BK 2523 type) based on the Doppler Effect. The method for evaluation of the rotation angle is based on the phase demodulation.

This talk summarizes statistical approaches to consistency analysis using key comparison data, including conventional mediated testing relative to the inverse variance weighted mean, extensions of this chi-squared methodology to accommodate finite degrees of freedom in the uncertainty claims, and a fully bilateral approach that avoids invocation of any key comparison reference value.

In this paper, a case-study of the THERMOWET measurement system control application is conducted and it’s software engineering aspects are described.

The uncertainty propagation in the calibration of single normal hot-wire anemometry probes used in the constant temperature mode is discussed in this paper. The two most used forms of calibration curve (the fourth order polynomial and the King’s law) are considered. The presented discussion is also useful for probes which are more complex than the single normal, such as the single yawed, the X, the V-shaped, the triple- and the four-wire probes. The uncertainties discussed here are important in mean flow velocity, and the discussion developed provides a notable opportunity to review some important aspects of the uncertainty propagation in any calibration involving curve fitting.

With regard to repeated assaults from Internet area on Linux servers where the monitoring and controlling system based on the TCP/IP protocol has been debugged and tested, there was designed and applied an effective firewall based on packet filtering for those servers. This firewall is able to defend the Linux server against most common attacks. Our own Linux distribution based on Debian/GNU distribution was designed and debugged. This distribution is loadable from a CD or a compact flash memory in case of an unfiltered Internet attack.