PRESSURE TRANSDUCER Russian patent published in 2006 - IPC G01L9/12 

FIELD: aviation instrument engineering.

SUBSTANCE: pressure transducer can be installed on board of flying vehicle. Pressure transducer has casing with membrane, case, and electric joint, capacitive transducer. The latter has capacitors, one of which is sensitive and the other is not sensitive to pressure. Capacitors are formed by four electrodes. Movable electrode is fastened to rod of pressure-receiving membrane. Motionless electrode of pressure non-sensitive capacitor has the same configuration as motionless electrode of reference capacitor. Both electrodes are disposed on bases connected with casing onto fixing protrusions of its central rod to make electric contact with each other. Set of outputs which provides contact of plates of capacitors with electric joint has assembly of rigid rods which pass through in electric joint through glass bushing and curved plates welded to rigid rods. Electric joint, which has shape of disc welded to casing, is mounted to have space relatively external surface of bases. Inside space the three-lobe element is disposed which prevents transmission of thermal deformation of electric joint and case to transducer's members.

EFFECT: improved reliability of operation.

7 dwg