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

A sensor assembly for a sensor, which sensor assembly comprises:

• a deformation body including a first surface, an oppositely lying, second surface and an outer edge segment;
• a sensor blade extending from said first surface of said deformation body out to a distal end, 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 abrupt changes of temperature on said first surface, wherein:
• said protective apparatus includes at least one plate adjoining said 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.

A sensor for registering pressure fluctuations in a flowing fluid for registering pressure fluctuations in a Karman vortex street formed in the flowing flow, which sensor comprises:

• a sensor assembly for a sensor;
• as well as a transducer element for generating a sensor signal, representing movements of said sensor blade changing as a function of time, especially at least at times periodic movements of said sensor blade, and/or representing deformations of said deformation body changing as a function of time, especially at least at times periodic deformations of said deformation body;
• said sensor assembly comprising:
• a deformation body including a first surface, an oppositely lying, second surface and an outer edge segment;
• a sensor blade extending from said first surface of said deformation body out to a distal end, 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 abrupt changes of temperature on said first surface, wherein:
• said protective apparatus includes at least one plate adjoining said 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.

A measuring system for measuring at least one flow parameter changeable as a function of time, such as a flow velocity and/or a volume flow rate, of a fluid flowing in a pipeline, which measuring system comprises:

• a sensor for registering pressure fluctuations in a flowing fluid for registering pressure fluctuations in a Karman vortex street formed in the flowing flow, 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 said sensor blade changing as a function of time, especially at least at times periodic movements of said sensor blade, and/or representing deformations of said deformation body changing as a function of time, especially at least at times periodic deformations of said deformation body;
• said sensor assembly comprising:
• a deformation body including a first surface, an oppositely lying, second surface and an outer edge segment;
• a sensor blade extending from said first surface of said deformation body out to a distal end, 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 abrupt changes of temperature on said first surface, wherein:
• said protective apparatus includes at least one plate adjoining said 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;
• 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.