Comparison of Frequency Features of Pulse Echoes from Different Reflectors | Zendy

А. Б. Ринкевич | Zendy; Olga V. Nemytova | Zendy; Д. В. Перов | Zendy

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Comparison of Frequency Features of Pulse Echoes from Different Reflectors

Author(s) -

А. Б. Ринкевич,

Olga V. Nemytova,

Д. В. Перов

Publication year - 2011

Publication title -

isrn mechanical engineering

Language(s) - English

Resource type - Journals

eISSN - 2090-5130

pISSN - 2090-5122

DOI - 10.5402/2011/371514

Subject(s) - acoustics , reflector (photography) , instantaneous phase , echo (communications protocol) , pulse (music) , noise immunity , optics , transformation (genetics) , wavelet , physics , noise (video) , transducer , center frequency , ultrasonic sensor , computer science , radar , telecommunications , image (mathematics) , electronic circuit , quantum mechanics , band pass filter , light source , computer network , biochemistry , chemistry , artificial intelligence , detector , gene

The analysis of interaction of ultrasonic pulses with different reflectors which are located in elastic media is carried out. A parameter which allows estimating the form of reflector is instantaneous frequency of pulse-echo. This parameter is an unsteady pulse echo characteristic. Instantaneous frequency determination algorithm is to use wavelet transformation which has increased noise immunity. It is shown that the instantaneous frequency value for a pulse echo is often shifted from a rated frequency of piezoelectric transducer. Difference between the frequencies extensively depends on the reflector form.

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