TC3 workshop - contribution 1

The article deals with a monitoring and controlling system based on the client-server architecture and communicating in frames of TCP/IP communication protocol. That system is applied for monitoring and controlling of real technological processes like fermentation temperature in local dimension area without direct connecting possibilities. The designed structure and its realisation has been proved in a real experiment with chromium tanned leather rests recycling process.

We have demonstrated a feasibility study of the fiber optic sensor to monitor the distributed temperature on a building construction. A fiber optic BOTDA sensor system, which has a capability of measuring the temperature distribution, attempted over several kilometers of long fiber paths. This simple fiber optic sensor system employs a laser diode and two electro-optic modulators. The optical fiber of the length of 1400 m was installed on the surfaces of the building. The change of the distributed temperature on the building construction was well measured by this fiber optic sensor. The temperature changed normally up to 4°C through one day. Also, The temperature distribution of spring season was compared with that of early winter season.

It is possible to integrate strain measurement elements below the surface in fast rotating composite parts consisting of carbon reinforced Polyetheretherketone (CFPEEK).
Such measurement elements are made of resistance wires insulated by a netting of glass fibres. This way it is possible to monitor large portions of a composite part up to the limit of loading.
In this article measurement results are published which were obtained by means of resistant wires embedded below the surface of the composite material. The wires are made from the resisting material ISAOHM.

A premature failure of machine tool spindle bearings is a major problem in production and can result in enormous loss in the production and spindle rehabilitation cost. This paper describes a condition monitoring system applied to the spindle of a NC machining centre. During idle run the acoustic emission and vibrations were measured using sensors installed in prepared places. A large number of tests were carried out with varying sensor location, spindle rotating speed and spindle load. Measurements were performed in real industrial environment nine times with six weeks intervals in order to obtain trends. The spindle run out was determined at every measurement time as well.