Wear detection has traditionally restricted itself to offline study and measurement. In this paper a vision system for online monitoring and detection of wear is described. This system uses a video zoom microscope and a high-resolution monochrome camera to capture the image series of a moving surface under study. An algorithm based on multichannel filtering for the detection of wear patterns is presented. The wear patterns are extracted by filtering the acquired image using a Gabor filter bank with multiple narrow spatial frequency and orientation channels. Experiments show the feasibility and usefulness of the proposed vision system and detection method of wear patterns.

Experimental optical method of caustics is established for solving the singularity at the crack tip through the stress intensity factor evaluation. Method is advantageously improved in application to mechanically anisotropic materials such as fiber-reinforced composites. Recently, the experiments are performed for different types of isotropic body contacts and the analysis of optical effects. Task of experiments is prediction of the future of inspected material surface and the assessment of structure damage. Theoretical fundamentals will prospectively provide the application of the method of caustics to the contact of the structural parts made of composites.

In this paper a new segmentation algorithm based on the k ñnearest neighbours statistical decision rule is presented. This algorithm was designed for use in systems of quantity image analysis, especially in industrial measurement systems. This algorithm was implemented in a system measuring surface tension and wetting angle parameters, knowledge of which is extremely important for the assessment of quality of solders, for example.

To solve spatial technical problems by three dimensional photoelasticity it is necessary to fix the optical effect in the model. In order to avoid the well known disadvantages of the classical freezing method ionising irradiation is used for that purpose. With this method it is not necessary to enlarge the scaling-factor for the displacement which is in some cases very important especially when shrinking is used to develop the fringe pattern. In addition fixation with ionising irradiation can be carried out without elevated temperatures. The most important advantage compared with the freezing method is given by the fact that Poisson’s ratio of the polymers is in this way practically the same as in the simple two dimensional photoelasticity. This is very important because using the classical freezing method temperature treatment above the glass temperature is needed and in this temperature range Poisson’s ration of the polymer is practically the same as in plasticized zones so that by using the classical freezing method it is not possible to distinguish between the elastic and the plasticized zones of the model. The mentioned features were already shown in case of two dimensional contact problem. New materials introduced by Beer at all opened additional possibilities in modelling more complex problems. However dealing with models consisting of two (or even more) different parts we have to keep in mind that shrinking in such models causes residual stresses and for that reason an accompanying rheological process is going on.

The paper describes some Cathode Ray Tubes (CRT) Implosion Protection Systems (IPS) and their possible control methods.
The implosion of CRT (tube) is prevented by using the Shrink Fit Rim Band (SFRB) reinforcing the edge of the tube so that it cannot bulge outwards. The main parameter of SFRB is the shrinking force. Measurement of such a shrinking force is a very important SFRB quality control method herewith of safe CRT. In this paper we consider several methods of shrinking force measurement:
- Magnetization method;
- Barkhausen’s noise method;
- CRT imitator-measurer.
Magnetization method can be successfully used for the measurement of shrinking force. However, there have been found some regularities of this method, which partly limit its application in a number of cases. This method cannot be used when the shrinking force changes its direction. It is applicable only when controlled material is magnetized.
Barkhausen’s noise method is rather effective in the control of shrinking force. However as the Barkhausen’s noise depends not only upon stresses in material but also upon chemical and structural composition of material, there is a problem of calibration.
CRT imitator-measurer provides sufficient accuracy of measurement; therefore it can effectively measure the shrinking force. The device is successfully used in carrying out experiments in Ekranas Co.