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US 5,969,263 AGranted
Ultrasonic fluid counter for attenuating parasitic ultrasonic waves
AssigneeSchlumberger Industries
InventorsPatrice Ligneul, Philippe Hocquet, Benoit Froelich
Life of this patent
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Abstract
The invention concerns an ultrasonic fluid counter including at least two ultrasonic transducers collectively defining an ultrasonic measuring path and emitting and receiving ultrasonic waves in the fluid along said ultrasonic measuring path according to at least one ultrasonic frequency, wherein attenuation means for attenuating parasitic ultrasonic waves generated outside said fluid counter and transmitted by the fluid according to the ultrasonic frequency or frequencies are associated with the fluid counter.
Claims15
An ultrasonic fluid counter including:
- fluid intake and evacuation openings,
- at least two ultrasonic transducers collectively defining an ultrasonic measuring path and transmitting and receiving ultrasonic waves in the fluid along said ultrasonic measuring path according to at least one ultrasonic frequency,
- means for attenuating the parasitic ultrasonic waves generated outside said fluid counter and transmitted by the fluid according to the ultrasonic frequency(cies), said means being disposed between the external source and the ultrasonic measuring path and being made, at least partly, of a material absorbent to the ultrasonic frequency (cies) used in the counter,
- a chamber between one of the openings and the ultrasonic measuring path in which the means for attenuating the parasitic ultrasonic waves are disposed, said means for attenuating the parasitic ultrasonic waves including an inlet and at least one outlet for the fluid flow and serving as a screen between the inlet and outlet of said means for the parasitic ultrasonic waves wherein the means for attenuating includes walls made of a material absorbing the ultrasonic waves, said walls being deformed towards the inside of said means for attenuating so as to serve as a screen between the inlet and outlet of said means for attenuating the parasitic ultrasonic waves.
1 more element
An ultrasonic fluid counter including:
- fluid intake and evacuation openings,
- at least two ultrasonic transducers collectively defining an ultrasonic measuring path and transmitting and receiving ultrasonic waves in the fluid along said ultrasonic measuring path according to at least one ultrasonic frequency,
- means for attenuating the parasitic ultrasonic waves generated outside said fluid counter and transmitted by the fluid according to the ultrasonic frequency(cies), said means being disposed between the external source and the ultrasonic measuring path and being made, at least partly, of a material absorbent to the ultrasonic frequency(cies) used in the counter,
- a chamber between one of the openings and the ultrasonic measuring path in which the means for attenuating the parasitic ultrasonic waves are disposed, wherein the means for attenuating the parasitic ultrasonic waves include at least one obstacle disposed between the inlet and outlet so as to serve as a screen for the parasitic ultrasonic waves wherein the obstacle separates the fluid flow derived from the inlet into at least two flows.
1 more element
Dependencies are inferred from the claim text.