DEVICE FOR PRESSURE MEASUREMENT Russian patent published in 2009 - IPC H01L29/84 

FIELD: physics, measurements.

SUBSTANCE: strain transducer incorporates resistance strains gages controlled by potentials across isolated electrodes connected in the in the bridge-type strain measuring circuit. Aforesaid strain transducer has its measuring diagonal connected to amplifier inputs, selectable peak detector, memory capacitor and to controlled frequency generator with inputs being connected to delay unit and amplitude and pulse length stabiliser with its input, in its turn, being connected to bridge supply diagonal and connected in series to the frequency-to-voltage converter input. The said converter output is connected to strain transducer control electrodes. The delay unit output is connected to control input of the aforesaid selectable peak detector, while the controlled frequency generator output is connected with an output of the proposed device.

EFFECT: increase in accuracy of measurements via connection into measuring bridge-type circuit of controlled resistance strain gages and negative servo feedback circuit connected to aforesaid strain transducer to allow automatic control over measuring system.

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