PRESSURE MEASUREMENT DEVICE IN WIND TUNNELS Russian patent published in 2017 - IPC G01L9/12 

FIELD: measurement equipment.

SUBSTANCE: pressure sensor, comprising strain gauges and capacitive sensing elements, is provided for measuring these pressures. The sensing elements are arranged coaxially between each other. Also the subtraction units are offered, in order to isolate the pressure pulsation from the total and the static pressure. The coaxial sensors from one to several tens, are mounted on the surface of the removable stub (the wind tunnel wall) and inside the comb (mounted to one of the working chamber sections of the tunnel). The sensors, mounted flush with the combs and the stub, do not violate the streamlined flow. The proposed device, consisting of the strain gauges and the capacitive sensing elements, simultaneously measures the static pressure and the pressure pulsations at the predetermined point. The sensors, mounted on the stub, can be placed simultaneously in different sections of the tunnel chamber.

EFFECT: improving accuracy of measuring the total and the static pressure, the measurement quality without distorting the flow.

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