Abstract: Disclosed is a device for measurement of a flow speed of a gas comprises a probe, a voltage supply source and a pulse-counting detection circuit. The probe comprises an axial electrode whose exposed end has a small radius of curvature, and a peripheral electrode. The supply source applies an alternating voltage between both electrodes, and electrical discharges which are produced through the gas between the two electrodes are detected and counted by the detection circuit. Such a speed measurement device is particularly reliable, and suited for use on board an aircraft for measuring the speed thereof relative to the surrounding air.

Abstract: Disclosed is a device for measurement of a flow speed of a gas comprises a probe, a voltage supply source and a pulse-counting detection circuit. The probe comprises an axial electrode whose exposed end has a small radius of curvature, and a peripheral electrode. The supply source applies an alternating voltage between both electrodes, and electrical discharges which are produced through the gas between the two electrodes are detected and counted by the detection circuit. Such a speed measurement device is particularly reliable, and suited for use on board an aircraft for measuring the speed thereof relative to the surrounding air.