DIFFERENTIAL FREQUENCY ACCELEROMETRE Russian patent published in 2010 - IPC G01P15/08 

FIELD: physics.

SUBSTANCE: accelerometre is enclosed in a housing formed by half-cups 1, with a two-membrane elastic element 3 wedged in between along the perimetre, and the said elastic element is filled with a liquid inertial mass 4. The element 3 is connected to two non-magnetic high-conductivity screens 5, which move relative flat spirals 8 and 9 made on dielectric bases 6 and 7 connected into LC self-excited oscillators 11 and 12 using jumpers 10. Connectors 14 and 15 serve for power input and output of output frequencies of the LC self-excited oscillators 11 and 12. Deformation of the elastic element 3 under the effect of acceleration is converted to differential change of output frequencies, while deformation due to thermal expansion of the liquid 4 is converted to inphase change of these frequencies.

EFFECT: increased sensitivity, accuracy and obtaining high-frequency signals at the output which are suitable for direct radio transmission and which carry information on acceleration and temperature.

5 cl, 4 dwg, 1 tbl