STRAIN-GAUGE PRESSURE TRANSDUCER Russian patent published in 2004 - IPC

FIELD: testing and measurement technology; measurement of low pressures at varying temperatures.

SUBSTANCE: proposed pressure sensor has body with pressure-sensing flexible membrane mounted inside it and separated from it by heat-insulating partition; flexible sensing element with resistance strain-gauges is made in form of beam rigidly grounded on both sides and loaded with tensile-compressive force applied at off-center position relative to cross section of beam and transmitted through rod from pressure-sensing membrane through elastic center of beam. Rated thickness and width of beam of elastic member and its elastic center are determined depending on required sensitivity of strain-gauge transducer to pressure being measured due to respective mechanical treatment of solid bar of structural material. Displacement of elastic center of pressure-sensing elastic membrane to elastic center of elastic member is effected due to rod whose axis of symmetry is parallel to longitudinal axis of elastic member beam.

EFFECT: enhanced sensitivity at varying temperatures.

4 dwg