Sagem Defense Securite

Safran Electronics & Defense

Patrick Valette

François Guillot

Francois Guillot

Sonia Schindler

Jean-Marie Courteille

Denis Delville

Benjamin Declety

Bruno Larois

Frédéric Heurtaux

Gérard Pottier

The invention relates to an electric circuit suitable for cutting off an electric power supply of an electrical device, said electric circuit receiving as input at least two discrete electrical signals, the values of which condition the power supply of the electrical device, the discrete electrical signals having a high state if the electrical device needs to be supplied: the electric circuit including a voltage source; a first cut-off unit connected between the electrical device and the voltage source, the first cut-off unit having an open or closed state in accordance with the discrete electrical signals; a second cut-off unit connected to the intersection between the electrical device and the first cut-off unit, and to an earth line, the second cut-off unit having a state that complements the first cut-off unit if the discrete electrical signals are in identical states, said first and second cut-off units being controlled such as to generate a short-circuit in the event of a divergence between the discrete electrical signals.

Electric circuit for cutting off an electric power supply having transistors and fuses

The invention concerns a PCMCIA card for downloading flight data remotely via a wireless network to a ground station, the PCMCIA card being designed to be connected to an ACMS system of an aircraft, the ACMS system being designed to generate an ACMS report after at least one predefined condition has been satisfied, and to record flight data.

PCMCIA card for transferring flight data

The invention concerns an electric circuit designed to control a power supply of a piece of electrical equipment, the electric circuit comprising a piece of electrical equipment and a source of supply voltage, and further having, as inputs, at least two discrete electrical signals of which the values condition the cutting off of the power supply to the piece of equipment, the circuit being characterized in that it further comprises:&#x2014;a module for the redundant comparison of the discrete electric signals, comprising two branches for comparing said signals, parallel to one other, each branch being designed to supply, at the output, a control signal representative of each of the comparisons of said discrete electrical signals, and&#x2014;a first module for cutting off the power supply to the piece of electrical equipment comprising two switches in series, each one being controlled respectively by one of the two control signals. The invention also concerns a system for acquiring, processing and communicating avionics data installed in an aircraft, comprising such an electric circuit.

Redundant electric circuit for cutting off the power supply to a piece of equipment

The invention relates to an electrical circuit adapted for cutting off an electrical supply to an electrical equipment, said electrical circuit receiving as input at least two discrete electrical signals xi, i=1, N, the electrical circuit comprising: &#x2014;a voltage source; &#x2014;a number N&#x3e;1 cutoff units Ui connected together, i=1, . . . , N in series between the voltage source and the electrical equipment, and a last cutoff unit Ubeing connected to the electrical equipment, each cutoff unit Ui exhibiting an open or closed state as a function of an electrical control signal; the cutoff units Uj, j=1, N&#x2212;1 upstream of the last cutoff unit Ueach being controlled by a distinct discrete electrical signal xj, j=1, . . . , N&#x2212;1, the last cutoff unit being controlled as a function of the state of the cutoff units Uj, j=1, . . . , N&#x2212;1 upstream and a discrete electrical signal xdifferent from that controlling the upstream cutoff units Uj, j=1, N&#x2212;1.

Electric circuit for cutting off an electrical supply with relay and fuses

The invention relates to an electric circuit suitable for cutting off an electric power supply of an electric device, the circuit including an electrical device and a supply voltage source of the electrical device, also having as inputs at least two discrete electrical signals, the values of which condition the cutting off of the electric power supply of the device, the electric circuit being characterized in that same includes: at least two modules for cutting of the electric power supply connected between the voltage source and the electrical device, each module tar cutting off the electric power supply being controlled in accordance with the values of the discrete electrical signals; and at least two modules for comparing discrete electrical signals in parallel, in which at least one of the modules for cutting off the electric power supply is controlled by the outputs of the modules for comparing discrete signals.

Electrical circuit for cutting off an electric power supply comprising transistors and fuses having redundant logic

A method of conserving operating data of a vehicle, the method including the steps of collecting the operating data and recording it progressively on board the vehicle, detecting an event, as from a detection, transmitting to at least one external receiver firstly at least some of the data that is being collected and as it is being collected, and secondly at least some of the stored data in a chronological order that is the reverse of the order in which it was recorded, and recording the data received by said external receiver. A conservation system for implementing the method is also provided.

Growing community of inventors

Boulogne-Billancourt, France

Patrick Valette