STRAIN PRIMARY PRESSURE TRANSDUCER WITH ZERO DRIFT COMPENSATION AND MEMBRANE FOR IT Russian patent published in 2006 - IPC G01L9/04 

FIELD: strain measurement equipment.

SUBSTANCE: the strain primary pressure transducer includes a sapphire monocrystalline membrane having a planar surface and an opposite shaped surface applied to which is the force produced by the pressure to be measured under the action of which the membrane gets deformed, as well as a circuit of resistance strain gauges formed on the membrane planar surface and designed for detection of the applied force on the basis of variation of the resistance of the resistance strain gauges at a deformation of the membrane. The working profile of the membrane shaped surface has the shape of a groove, whose depth is determined by the pressure measurement range. The circuit of resistance strain gauges is preferably oriented to the most strain-sensitive crystallographic directions of the crystalline structure of the membrane. The strain primary pressure transducer may have a lever construction.

EFFECT: compensated zero drift.

14 cl, 4 dwg