Impulse sensor with balanced mass-stiffness distribution

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy

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Details

73 3, 7386268, 73DIG4, 310321, 310323, G01F 132

Patent

active

049761560

ABSTRACT:
An impulse sensor comprises a transducer container vessel of a cylindrical shape including a pair of stocky sections connected to one another by a midsection of a reduced cross section area, a force transmitting member extending from one end of the transducer container vessel and a force receiving member connected to the force transmitting member, wherein two Piezo electric elements are respectively contained in two cavities respectively included in the two stocky sections of the transducer container vessel. Each of the two Piezo electric elements has a pair of electrodes respectively disposed on the two opposite sides of a reference plane including the central axis of the combination of the transducer container vessel and the force transmitting member. Electrical signals supplied from the four electrodes are combined in such a way that the noises generated by the mechanical vibrations are cancelled and signals representing forces experienced by the force receiving member are obtained.

REFERENCES:
patent: 4248098 (1981-02-01), Sawayama et al.
patent: 4258565 (1981-03-01), Sawayama et al.
patent: 4437350 (1984-03-01), Tamura et al.
patent: 4699012 (1987-10-01), Lew et al.
patent: 4835436 (1989-05-01), Lew

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