PIEZOELEKTRISK TRYCKCENSOR

摘要

A piezoelectric pressure sensor, preferably for a vortex-shedding flowmeter. A piezoelectric transducer is located in a sensor chamber between and in physical contact with a vibratory diaphragm and a chamber surface. Pressure fluctuations in a von Karman vortex street outside the diaphragm compress the transducer, between the diaphragm and chamber surface. The transducer generates a responsive electrical signal which is related to the pressure fluctuations.