Piezoelectric transducer notably for pressure measurement

Details Piezoelectric transducer notably for pressure measurement Piezoelectric transducer notably for pressure measurement

G - Physics

01

L

349/65, 73/67

G01L 9/08 (2006.01) G01K 7/32 (2006.01) G01L 9/00 (2006.01) G01L 19/04 (2006.01)

Patent

CA 1194707

PATENT ETUDES ET FABRICATIONS FLOPETROL PIEZOELECTRIC TRANSDUCER, NOTABLY FOR PRESSURE MEASUREMENT ABSTRACT OF THE DISCLOSURE In a pressure transducer of the piezoelectric type, a resonator (10) is made up of a pellet (16) mounted inside an element designed to be subjected to the action of a pressure on its exterior face (18). The pellet (16) and the element (12) are cut in the same quartz block, using a cut which provides two vibration modes. The forces resulting from the external pressure are transmitted to the edge of the pellet (16) by connecting bridges (22, 23) whose orien- tation is chosen so that one of the vibration modes has maximum sensitivity to the forces while the other mode has a practically zero sensitivity. (Figure 2).

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