Borisenko E. Improving accuracy of ultrasonic level meters in special operating conditions via a test method

Research object – the process of liquid and solid material level measurement by ultrasonic level meters. A research objective – methods of mathematical modeling and simulation using a computerized data acquisition and processing of measurement data, methods of mathematical statistics, methods of processing the results of multiple observations, methods for determining the results and error estimates for indirect measurement, error estimation methods based on the theory of acoustics. In the synthesis methods for improving the accuracy of used algorithms for digital signal processing, automatic control methods, structural and algorithmic methods to improve test accuracy. Theoretical and practical results - for urovnemetrii concluded that the ultrasonic sensor built bulk and liquid media that implements the methods of test inputs, thus reducing the overall uncertainty of the measurement result in special conditions from 13.8% to 0.8%. Scientific novelty - was further developed the method of test inputs for instruments with an interval representation of measurement data by joint use of the additive and multiplicative tests allowed to compensate for additive and multiplicative error component; first proposed test method improve the accuracy of ultrasonic level liquid and granular media, which is due to the increment of the reference and the measured level changes quantizing pulse repetition period by partial compensation of systematic and random errors will improve the accuracy level measurement results in specific operating conditions; Use justified median smoothing algorithm data, which, unlike other simple algorithm is more effective for reducing the random error components. The degree of implementation - implemented at Scientific-Production Enterprise "T.O.R." Ltd., under the control of the coolant locomotive diesel generator and Municipal Enterprise "Kharkiv Heating Networks" in the control of water and fuel oil in the tanks; the development of useful models of level, to improve the accuracy and reliability of measurements (patents of Ukraine № 47454 from 10.02.2010, Bull. № 3 and № 53775 25.10.2010, Bull. № 20). Scope of application - intelligent means of measuring technics