VARIABLE-CAPACITANCE PRESSURE TRANSDUCER Russian patent published in 1997 - IPC

FIELD: measurement of pressure on object surface in aeronautical engineering and mechanical engineering without draining of the surface under check. SUBSTANCE: the transducer is based on six electrical films. First membrane 8 is made of metal with blind perforation cells 9 for measurement is made of dielectric film 15 for measurement of low pressure levels. Both sensitive elements are protected against external electromagnetic noise by two continuous (2,16) and lateral (4,12) screens. Capacitor plates 5 and 13 are formed on second film 3 and sixth film 15. Pressure is judged by variation of the capacitor value. The transducer provides for measurement of pressure pulsations in the fields of gas dynamics and hydrodynamics - simultaneously low (0 to 50 Pa) and high (50 to 10,000 Pa and higher) levels. EFFECT: expanded measurement range. 1 dwg