Patent ID: 6497152
Filing Date: 2002-12-24
Classification: G01L

Abstract:
A transducer for providing an electrical signal having a frequency indicative of a differential pressure, comprising:a force-sensitive resonator controlling the frequency of the electrical signal, the resonator having at least one resonant element connected between a pair of mounts such that its resonant frequency is dependent on the elastic properties of the resonant element and the force applied to the resonant element through the mounts so th at the frequency of the electrical signal varies as a function of the force applied to the resonator through the mounts; and a curved resilient pressure vessel having at least one closed end and a length of at least 4 cm, the pressure vessel having an interior and an exterior between which the differential pressure is applied, the pressure vessel being coupled to the mounts of the force-sensitive resonator and having a pressure-responsive configuration so that it generates forces through the mounts whose magnitude is a function of the differential pressure and the dimensions, composition, and geometry of the pressure vessel, the dimensions, composition, and geometry of the pressure vessel being such that any structural resonant frequencies of the pressure vessel are outside the ranges of frequencies coupled to the mounts by the force-sensitive resonator.