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Название: Measurement error reducing in the ultrasound time-pulse systems
Авторы: Soldatov, Aleksey Ivanovich
Kozhemyak, Olesya Anatolievna
Soldatov, Andrey Alekseevich
Chiglinceva (Chiglintseva), Yulia Viktorovna
Ключевые слова: погрешности измерения; ультразвук; компараторы; сигналы
Дата публикации: 2015
Издатель: IOP Publishing
Библиографическое описание: Measurement error reducing in the ultrasound time-pulse systems / A. I. Soldatov [et al.] // IOP Conference Series: Materials Science and Engineering. — 2015. — Vol. 81 : Radiation-Thermal Effects and Processes in Inorganic Materials : International Scientific Conference, 3-8 November 2014, Tomsk, Russia : [proceedings]. — [012117, 10 p.].
Аннотация: Ultrasound wave propagation in bounded media results in change of the echo-pulse shape, therefore the use of traditional method of determining of the propagation time of the ultrasound pulse based on use of threshold device (comparator) gives a large error of measurement. To reduce this error the new methods of the determining of echo-pulse propagation time are proposed in this paper. The first method is the method based on the use of two comparators, the second one is the method based on second-order polynomial approximation of the echo-pulse envelope. Analysis showed that the steeper the rising edge of the echo-pulse envelope, the less the error of determining of the pulse start time. The more the difference between comparator thresholds the less the error of determining of the pulse start time. Application of the method of two comparators gives two times systematic error reducing. Minimal sampling of input signal is determined for the method based on echo-pulse envelope. Dependence of the error at start echo-pulse determining on adjacent samples amplitude ratio is obtained. Application of echo-pulse envelope gives three times systematic error reducing.
URI: http://earchive.tpu.ru/handle/11683/14762
Располагается в коллекциях:Материалы конференций

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