B/e Aerospace Systems Gmbh

Dragerwerk Aktiengesellschaft

Draegerwerk, Ag

Thomas Sauerbaum

Heiko Marz

Stefan Kahning

In a preferred embodiment, methods and systems for the control of the breathing gas supply from a pressure-leading supply conduit to one or more breathing masks of an oxygen emergency supply device in a passenger aircraft include an on/off valve arranged between the supply conduit and the one or more breathing masks. The valve can be blocked or released to control air supply based upon monitoring mass flow to the breathing masks. The valve, for example, is actuated to an open position until the error between the actual mass flow and a desired mass flow exceeds a maximal error value, whereupon the valve is actuated to a closed position until the error between the actual mass flow and the desired mass flow exceeds a minimal error value whereupon the valve is actuated to the open position and the mass flow monitoring cycle is repeated.

Method for the control of the breathing gas supply

The invention relates to a method for the control of the breathing gas supply, in particular of the oxygen supply, from a pressure-leading supply conduit () to one or more breathing masks () of an oxygen emergency supply device in an air vehicle, in particular in an aircraft, with which an on/off valve () is arranged between the supply conduit () and the one or the several breathing masks (), with which valve the conduit connection can be blocked or released, with which a desired mass flow dependent on cabin pressure is set and the actual mass flow is detected, wherein in a first method step the valve () is activated in an opening manner until the error between the actual mass flow and the desired mass flow and which is summed over time exceeds a previously fixed maximal error value (), whereupon the valve () in a second method step is activated in a closing manner until the error between the actual mass flow and the desired mass flow and which is summed over time exceeds of a previously fixed minimal error value (), whereupon the cycle is repeated beginning with the first method step.

The invention is directed to an apparatus for determining the component of paramagnetic substances such as oxygen. This determination is made with a magnetic field source and an even number arrangement of magnetic field cores, with each field core being surrounded by a measuring field coil for detecting the magnetic changing field generated by a rotatable cuvette. The apparatus is improved in that the formation of the magnetic stray fields is reduced and the component of the magnetic flux which is effective for measurement and which passes through the cuvette is increased. For this purpose, the cuvette is mounted in the housing of the apparatus in such a manner that its rotational plane partitions the housing into two component regions. The magnetic field source is arranged in one component region and the magnetic field cores and the measuring field coils corresponding thereto are arranged in the other component region of the housing.

Apparatus for determining the proportion of a substance having

A method for measuring the dew point according to patent application P 36 33 015 is expanded so that an automatic zero point correction can be carried out. For this purpose, the heating power on the heating device is raised to a point, at which the dew evaporates and the sensor-specific property, for example the capacity, is measured and supplied to the evaluating unit as a calibration signal.

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Gross Gronau, Germany

Thomas Sauerbaum