DEVICE FOR MEASUREMENT OF STATIC PRESSURE Russian patent published in 2010 - IPC G01L9/12 

FIELD: measuring equipment.

SUBSTANCE: invention is related to measuring equipment and may be used for measurement of static pressure in aeronautical engineering and machine building by method without draining of inspected object. For this purpose matrix capacitance sensor is used made of several sensitive elements on a single substrate. Device comprises matrix capacitance pressure sensor, auxiliary capacitor arranged on film base, and signal converter. Device is also arranged on the basis of integrated microcircuit chips. Matrix capacitance sensor is connected to circuit of integrator, output of the latter is connected to integral microcircuit chip for matching and amplification of signal from output of matrix capacitance sensor. Auxiliary capacitor is connected to differentiator circuit. Output of the first amplifier via matrix capacitance sensor is connected to input of differentiator. Integral microcircuit chip is connected to outlet of differentiator, in order to provide for low ohm resistance and stability of output device voltage. Auxiliary capacitor is isolated from effect of measured pressure and is not isolated from effect of external factors (temperature, vibration, moisture, etc.).

EFFECT: invention makes it possible to compensate effect of external factors at results of static pressure measurement.

1 dwg