Том 52, № 5 (2016)

An ultrasonic multifunctional adaptive measuring complex, which is built on the basis of a personal computer and algorithmically generates various simple and complexly modulated probing signals, is described. This system implements various radio-engineering algorithms for processing echo signals (storage, optimal filtering, synchronous detection, etc.) and provides adaptation of the signal parameters to the characteristics of inspected objects. Using the example of a frequency-modulated signal, it is shown that an adaptive measuring complex can increase the testing reliability and provide high sensitivity and high resolution owing to both the adaptive adjustment of the parameters of a probing signal and the compensation for distortions in the received signal in the electroacoustic path.

The results of theoretical and experimental studies on an electromagnetic field are presented and qualitative and quantitative estimates of the field amplification at the end of a conducting plate due to its interaction with an alternating (traveling) magnetic field are given for the development of the eddy-current testing of conducting thin-wall bodies.

A procedure that operates using the theory of identification measurements of signals and a computerized vibration-monitoring device for an NM 12500-210 pump unit are described. It is shown that the state of an object that is being monitored can be represented by a cluster, an array of linguistic characteristics of model signals with known distribution laws of instantaneous values. A consecutivecomparison procedure is described for assessing the condition of each element in the cluster and of all the clusters that contain respective elements that are stored in a database.

A method for electro-optical monitoring of the chromatic deviation of the polymeric coating of a galvanized strip on the basis of the neuro-fuzzy model is proposed. As well, the main parameters that influence the chromatic error were determined and method for the integration of the developed model into an industrial situation on the basis of Omron approaches is proposed. Application of this model allows one to estimate the cumulative chromatic deviation of a polymeric coating with an error of 4.7%.

Methods for studying polymer composites by X-ray computed tomography are presented. A test bench for generating static loads and investigating materials is considered.