Ryabichenko A. The ultrasonic liquid level meter with a compensating input signal

The object of research is the process of measuring control the level of liquids by ultrasonic method with compensating input signal; The research purpose is to expand the range of measuring control, increase accuracy and reliability of monitoring the level of liquids by compensating balance ultrasonic signals reflected from the base plate and the surface of the liquids. The methods studies are based on the theory of rheological transitions and zero-gradient method for the theoretical and experimental investigations of the ultrasonic transmitter and ultrasonic level meter with compensating input signal, methods of mathematical and physical modeling, the theory of errors of measurement and control, based on the method of integral functional, regression and correlation analysis, methods of mathematical statistics in the processing of research results, the theory of nonlinear differential equations for the metrological analysis of the ultrasonic level meter. The theoretical results - first proposed by the ultrasonic method of measuring control the level of liquids with a compensating input signal, which, unlike the existing ones, can extend the range of the measuring control, to increase the accuracy and reliability of control. Improved mathematical model of the ultrasonic transducer, which, in contrast to the well-known, describe the electromechanical processes in the converter in an analytical form. Has been further developed a method of integral functional for the study errors, which, in contrast to the well-known, allows to take into account non-linear error, allowing to optimize the static characteristic and to determine the distribution of errors of the ultrasonic level meter along the range of measuring control; the practical results - based on the performed theoretical and experimental studies developed and implemented in the production of ultrasonic level meter with compensating input signal. The degree of implementation - the results of the thesis put into research and production enterprise "Mikroterm" (Severodonetsk) for the development of ultrasound controls with improved metrological characteristics, as well as in the educational process at the department of computer-integrated systems of management of Technological Institute of East Ukraine Volodymyr Dahl National University (Severodonetsk). The application field is the chemical industry.