Sensor assembly for a sensor, sensor, and measurement system formed therewith

A sensor for registering pressure fluctuations in a flowing fluid, which sensor comprises:

• a sensor assembly;
• as well as
• a transducer element for generating a sensor signal representing movements of a sensor blade changing as a function of time, and/or representing deformations of said deformation body changing as a function of time;
• said sensor assembly comprising:
• a deformation body including a first surface, an oppositely lying, second surface and an outer edge segment;
• said sensor blade, as well as;
• a protective apparatus for protection of said deformation body from pressure surges exerted against said first surface and/or for protection of said deformation body from changes of temperature on said first surface, wherein:
• said sensor blade extends from said first surface of said deformation body out to a distal end;
• and
• said protective apparatus includes at least one plate adjoining said outer edge segment of said deformation body and extending radially inwardly in the direction of said sensor blade, in such a manner that:
• between said plate and said deformation body a cavity is formed which accommodates a region of said sensor blade adjoining said first surface of said deformation body and remote from the distal end of said sensor blade, and
• a gap formed between said plate and said sensor blade;
• and
• wherein said deformation body, said sensor blade and said protective apparatus are so dimensioned and arranged that said gap, in the case of said sensor blade located together with said deformation body in a shared static resting position, shows a maximum gap width, which is less than 0.5 mm.

A measuring system for measuring at least one flow parameter changeable as a function of time of a fluid flowing in a pipeline, which measuring system comprises:

• a sensor for registering pressure fluctuations in a flowing fluid, which sensor comprises:
• a sensor assembly for a sensor;
• as well as a transducer element for generating an electrical or optical sensor signal, representing movements of a sensor blade changing as a function of time and/or representing deformations of said deformation body changing as a function of time;
• as well as
• measuring electronics, which is adapted to receive and to process the sensor signal, to generate measured values representing that at least one flow parameter;
• wherein said sensor assembly comprises:
• a deformation body including a first surface, an oppositely lying, second surface and an outer edge segment;
• said sensor blade, as well as;
• a protective apparatus for protection of said deformation body from pressure surges exerted against said first surface and/or for protection of said deformation body from changes of temperature on said first surface, wherein:
• said sensor blade extends from said first surface of said deformation body out to a distal end;
• and
• said protective apparatus includes at least one plate adjoining said edge outer segment of said deformation body and extending radially inwardly in the direction of said sensor blade, in such a manner that:
• between said plate and said deformation body a cavity is formed which accommodates a region of said sensor blade adjoining said first surface of said deformation body and remote from the distal end of said sensor blade, and
• a gap formed between said plate and said sensor blade;
• and wherein said deformation body, said sensor blade and said protective apparatus are so dimensioned and arranged that said gap, in the case of said sensor blade located together with said deformation body in a shared static resting position, shows a maximum gap width, which is less than 0.5 mm.