A circuit with transistors and fuses to cut off the power supply

A technology of power supply and circuit, which is applied in the field effect transistor reliability improvement, circuit or fluid pipeline, power distribution, etc., can solve the problems of high safety level and unsatisfactory, and achieve the effect of fault robustness

Active Publication Date: 2019-05-03
SAGEM DEFENSE SECURITE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, such schemes are not satisfactory when a particularly high level of security is required

Method used

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  • A circuit with transistors and fuses to cut off the power supply
  • A circuit with transistors and fuses to cut off the power supply
  • A circuit with transistors and fuses to cut off the power supply

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] about figure 1 , avionics data acquisition, processing and communication systems include:

[0035] - an acquisition unit (not shown) of discrete electrical signals x1, x2 indicative of the state of the aircraft;

[0036] - radio module 2, suitable for communicating the avionics data of the system to the remote station;

[0037] - Voltage source +Vpp for radio module 2, and

[0038] - The power supply circuit 1 of the radio module 2, which makes it possible to cut off the power supply of the radio module when the aircraft is in flight.

[0039] The state of the aircraft is, for example, in flight, on the ground, and the like. When the aircraft is on the ground, discrete electrical signals indicating that the aircraft has landed are, for example, a signal indicating that the weight of the aircraft is present on the wheels, or a signal indicating that a door of the aircraft is opened.

[0040] Power circuits can be modeled by switches controlled by logical functions of...

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PUM

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Abstract

The present invention relates to a circuit suitable for cutting off the power supply of an electrical device, said circuit receiving as input at least two discrete electrical signals whose values ​​determine the power supply of the electrical device, if the electrical device requires power supply, the discrete electrical signal Has a high state: the circuit includes a voltage source; a first disconnection unit is connected between the electrical device and the voltage source, the first disconnection unit has an open state or a closed state according to a discrete electrical signal; a second disconnection unit is connected to the electrical device and The intersection point of the first cut-off unit and the ground line, if the discrete electrical signal is in the same state, the second cut-off unit has a state complementary to the first cut-off unit, the first cut-off unit and the second cut-off unit are controlled to be in A short circuit occurs when there is a discrepancy between discrete electrical signals.

Description

technical field [0001] The invention relates to the field of security for control systems or equipment, especially electronic systems or equipment, more particularly onboard electronic systems or equipment on board aircraft. Background technique [0002] Once the conditions are confirmed, the electrical system can be brought under control. [0003] A known solution is to connect the power supply of the power system to a circuit configured to test a discrete signal indicating that a condition is true. [0004] For example, in the case of aircraft, some electrical equipment should be switched off during flight, for example, in the case of avionics data acquisition, processing and communication systems, wireless transmission radio modules must be switched off in order to avoid interfering with aircraft operation. [0005] The power to the radio module can be simply turned off when necessary by means of an AND logic gate connected to the switch. [0006] However, such a soluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/003
CPCB64D2221/00H03K19/00315H02H3/05B60R16/023B60R16/03
Inventor P·瓦莱特F·古洛特
Owner SAGEM DEFENSE SECURITE SA
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