Circuit for detecting the position of several bipolar contactors and application for a thrust reverser of a turbojet engine
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorsYves R. Halin, Eric C. Pean
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Abstract
The circuit of the present invention is able to detect and identify the position of several contactors. Each contactor (1) is mounted in series with a resistor (2). The first contacts (A.sub.N) are interconnected. The same applies for the second contacts (B.sub.N) and the third points (C.sub.N) of the branches established. In addition, the third points (C.sub.N) are separated by a second resistor (6). The measuring of the voltage between the first and third points (A, C) makes it possible to detect and identify the open and closed contactors and in addition is able to detect a malfunction. Application for detecting the position of the doors of a thrust reverser of a turbojet engine.
Claims6
A circuit for detecting the position of bipolar contactors arranged in parallel, each bipolar contactor having a lever which contacts one of a first point and a second point, said circuit comprising:
- a plurality of first resistors of a first resistance each connected in series with the lever of each bipolar contactor;
- a voltage power source connected between said first point of each bipolar contactor and said second point of each bipolar contactor;
- a plurality of third points each connected in series with each of said first resistors;
- an analog/digital converter connected between said first points and said third points which receives signals therefrom and outputs a measuring signal;
- and
- a processing circuit connected to the output of the analog/digital converter, which determines the positions of each of the bipolar contactors.
Dependencies are inferred from the claim text.