Process and device to determine a gas flow

Abstract

Abstract The device has an orifice (20), through which passes a gas stream flowing from an upstream chamber where a pressure P1 prevails to a downstream chamber where the pressure is P2. An electrically controlled movable valve (21) leaves open a triangular passage of an area determined by the position (h) of the valve, measured by a potentiometer (V). On the basis of this measurement and that of the pressure drop P2-P1, an electrical circuit supplies a signal corresponding to the gas flow. This signal can be compared with a nominal signal, and the valve be controlled retroactively so as to deliver a predetermined flow which, if required, can vary as a function of time. <IMAGE>

Inventors

• 👤 Jean-Denis Rochat

Bibliographic Details