Immersion ultrasonic transducers

The principles of operation and design immersion ultrasonic transducers developed by the authors for excitation reception elastic vibrations in moving filament-like plane-parallel materials, particular, polymer fibbers films, with an adjustable angle input (reception) probing signals into controlled object – films at normal high temperatures.
 technical characteristics installation are given which converters us used, namely, sounding base (distance from emitter to receivers), duration pulses, frequency filling speed object, combined standard measurement uncertainties difference Δt propagation times waves first second signal receivers, relative measurements attenuation coefficient velocity waves.