Bulakovska A. Computerized pipeline control system with tomographic processing acoustic signals.

Object of research: the process of detection and measurement coordinates of fistulas in pipelines by methods of tomographic processing of acoustic signals. Objective: development of methods and algorithms for localization of fistulas in pipelines by hardware-software method based on of fast Radon transform (FRT). Research Methods: Integral Geometry and Computed Tomography, Network Theory and Digital Signal Theory, Mathematical Statistics and Probability Theory, Computer Modeling and Calculations. Theoretical and practical results and novelty: 1. The results of theoretical character obtained in the dissertation are implemented in electronic devices, algorithms and software, calculation methods, etc. 2. Based on the developed theoretical models and methods, hardware-software devices for signal processing based on application-specific integrated circuits for the implementation of the FRT algorithm with interpolation on quasiregular grids were developed. It made possible to reduce the computational complexity of the algorithms and, accordingly, to increase the calculation velocity. 3. There were derived expressions and builded graphs for estimating the computational complexity of Newton's interpolation formulas with separated finite differences. These expressions are convenient for use while analyzing the characteristics of tomographic systems used for constructing pipeline monitoring systems. Novelty: 1. An improved model of a network-based pipeline management system grounded on network with a controlled logical topology, prioritization of key performance indicators, and various physical data communication channels, which allowed for overall coordination of local hardware-software subsystems. 2. A method for searching and localizing fistulas in pipeline by detection and measurement the coordinates of acoustic noise sources based on incomplete and noisy data has been developed first; it reduces the sensibility of fistula detection devices to the effects of arising artefacts. 3. Tomographic methods of combined narrow-view scanning and algorithms for detecting fistulas in pipeline with limited physical access have been developed first. These methods have satisfactory accuracy of measurement with sufficient ease of implementation. Subject matter and degree of implementation: The theoretical and practical results of the dissertation are implemented in the State Enterprise "Diprovyazok", which is confirmed by the relevant acts of implementation, as well as in the educational process of the National Aviation University in teaching the discipline "Computer Networks". Implementation Effectiveness: Recommendations for the selection of parameters and structure of compatible signal processing devices in industrial computer networks are used in the research and development developments of the third-level OSI model switches. This improves efficiency (obtaining the required accuracy of calculations while reducing the computational load to 5… 6 times compared to existing samples). Scope of application: 1. Pipeline transportation (transport systems of gas, oil and their derivatives, liquid chemicals). 2. Urban public utilities (water, heat, sewerage). 3. Industry (branched pipeline systems for the transportation of liquid substances). Concerning with scientific topics: The results of the dissertation research were performed within the framework of scientific research work № 18/10.02.05 "Method and means of projecting software with regard to quality requirements", which is conducted at the Chair of Computer Information Technologies of National Aviation University.