MATCHING BACK PRESSURES ON DIFFERENTIAL OIL-FILLED DIAPHRAGMS

摘要

Exemplary embodiments of the present invention provide a differential pressure transducer that comprises first and second diaphragms of different configurations, i.e., different diameters and/or thicknesses. The pressure transducer provides more versatility over prior art designs as the diaphragms can be of different configurations yet still maintain substantially similar back pressures. Therefore, the errors commonly associated with back pressures are eliminated because the back pressures from the diaphragms ultimately cancel out in the sensor's differential pressure measurement.

主权项

1. A pressure transducer, comprising:
a first diaphragm housed in a first section of a header, the first diaphragm having a first stiffness and being adapted to receive a first pressure; a second diaphragm housed in a second section of the header, the second diaphragm having a second stiffness and being adapted to receive a second pressure, wherein the first stiffness and the second stiffness are different; and a sensor module in communication with the first diaphragm and the second diaphragm via first and second oil-filled volumes, respectively, the sensor module adapted to output a signal indicating a difference between the first and second pressures; wherein the first diaphragm receives a first back pressure from the first oil-filled volume and the second diaphragm receives a second back pressure from the second oil-filled volume.