Method and device for controlling the pressure and/or flow rate of fluid

A device for the control of the flow rate and/or of the pressure of oxygen in a conduit for an emergency oxygen supply in manned aircraft that includes at least one oxygen mask, the device comprising:

• at least one electrical generator (35) configured to remove flow energy from an oxygen flow output from an oxygen supply (5) and to at least partially convert the removed flow energy into electric energy, the at least one electrical generator comprising a torus-shaped oxygen guide (115), a magnet (120) movable in a circular path within the torus-shaped guide by oxygen flowing through the torus-shaped guide, and a coil (125) wound about a circular cross-section of the torus-shaped guide;
• a pressure reduction valve (30) arranged between the oxygen supply (5) and the at least one electrical generator (35);
• at least one control mechanism (65) arranged downstream from the at least one electrical generator (35) for controlling a flow rate of the oxygen to the at least one oxygen mask, the at least one control mechanism (65) comprising an electrical drive fed by the at least one electrical generator (35);
• and
• at least one sensor (70) configured to measure the flow rate and/or the pressure of the oxygen and provide an output signal, activation of the at least one control mechanism (65) being controlled, at least in part, based on the output signal, the at least one sensor (70) being arranged between the at least one electrical generator (35) and the at least one control mechanism (65).