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

A technology of fuses and circuits, which is applied in the field of circuits that use relays and fuses to cut off power supply, and can solve problems such as safety levels that do not meet requirements

Active Publication Date: 2015-05-06
SAGEM DEFENSE SECURITE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, such a solution is not satisfactory in terms of security level, especially when a high security level is required

Method used

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  • Electrical circuit for cutting off an electrical supply with relay and fuses
  • Electrical circuit for cutting off an electrical supply with relay and fuses
  • Electrical circuit for cutting off an electrical supply with relay and fuses

Examples

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Embodiment Construction

[0028] about figure 1 , avionics data acquisition, processing and communication systems include:

[0029] - an acquisition unit (not shown) of discrete electronic signals x1, x2, x3 indicating the state of the aircraft;

[0030] - radio module 2 suitable for transmitting avionics data of the system to remote stations;

[0031] - Voltage supply +Vpp for radio module 2, and

[0032] - A power supply circuit 1 of the radio module 2, which makes it possible to cut off the power to the radio module when the aircraft is in flight.

[0033] The status of the aircraft is, for example, in flight, on the ground, and so on. When the aircraft is on the ground, discrete electronic signals indicating that the aircraft has landed are, for example, a signal indicating the presence of the aircraft's weight on wheels, or a signal indicating that a door of the aircraft is opened.

[0034] Power circuits can be modeled by switches controlled by logic functions of discrete electronic signals (...

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PUM

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Abstract

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: - a voltage source; - a number N>1 cutoff units Ui connected together, i=1,..., N in series between the voltage source and the electrical equipment, and a last cutoff unit UN being 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-1 upstream of the last cutoff unit UN each being controlled by a distinct discrete electrical signal xj, j=1,...,N-1, the last cutoff unit being controlled as a function of the state of the cutoff units Uj, j=1,.., N-1 upstream and a discrete electrical signal xN different from that controlling the upstream cutoff units Uj, j=1, N-1.

Description

technical field [0001] The present invention relates to the field of security for control systems or devices, especially electronic systems or devices, more particularly onboard electronic systems or devices on aircraft. Background technique [0002] Once the condition is confirmed, the electronic system can be controlled. [0003] One known solution is to connect the power supply of the electronic system to a circuit configured to test a discrete signal indicating that the condition is true. [0004] For example, as far as aircraft is concerned, some electronic equipment should be cut off during flight, for example, as far as avionics data acquisition, processing and communication systems are concerned, wireless transmission radio modules must be cut off to avoid interfering with aircraft operation. [0005] By means of a logic gate AND connected to a switch, the power to the radio module can be simply switched off if necessary. [0006] However, such a solution is not sa...

Claims

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Application Information

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IPC IPC(8): H02H3/02B64D47/00
CPCB64D2221/00H02J1/08H02J2310/44B64D43/00H02H3/02
Inventor P·瓦莱特F·古洛特
Owner SAGEM DEFENSE SECURITE SA
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