Sensor for detecting pressure fluctuations in a flowing fluid, and measurement system formed therewith

A sensor for detecting pressure fluctuations in a Kármán vortex street formed in a flowing fluid, the sensor comprising:

• a deformation element, which is flat at least in sections and includes a planar first surface and an opposite planar second surface;
• a sensor lug extending from the first surface of the deformation element;
• a connection sleeve extending from the deformation element;
• a transducer element disposed within the connection sleeve and contacting the second surface of the deformation element with a first contact surface as to generate an electrical sensor signal representing temporally changing movements of the sensor lug and/or temporally changing deformations of the deformation element;
• and
• a fastener disposed within the connection sleeve and mechanically connected thereto and configured to fix the transducer element in the connection sleeve,
• wherein:
• the fastener includes a cylindrical spring assembly formed of at least two stacked disk springs and an inner locking ring,
• the connection sleeve includes an inner groove in a region remote from the deformation element, and
• the inner locking ring is inserted into the inner groove to form an abutment configured to contact the spring assembly, and
• the disk springs are adapted to elastically deform by exerting a pressing force, which holds the transducer element against the deformation element.

A sensor for detecting pressure fluctuations in a Kármán vortex street formed in a flowing fluid, the sensor comprising:

• a deformation element, which is flat at least in sections and includes a planar first surface and an opposite planar second surface;
• a sensor lug extending from the first surface of the deformation element;
• a connection sleeve extending from the deformation element;
• a transducer element disposed within the connection sleeve and contacting the second surface of the deformation element with a first contact surface as to generate an electrical sensor signal representing temporally changing movements of the sensor lug and/or temporally changing deformations of the deformation element;
• a compensating element, which is rod-shaped or planar or sleeve-shaped, extending from the second surface of the deformation element and configured to compensate forces and/or torques resulting from common movements of the deformation element and the sensor lug;
• and
• a fastener disposed within the connection sleeve and mechanically connected thereto and configured to fix the transducer element in the connection sleeve,
• wherein the fastener includes a cylindrical spring assembly formed of at least two stacked disk springs, and
• wherein the disk springs are adapted to elastically deform by exerting a pressing force, which holds the transducer element against the deformation element.