Device and method for monitoring the obstructions in the close environment of an aircraft

Abstract

The invention relates to a device for monitoring obstructions for an aircraft including data storage, an anticollision device and viewing devices, wherein the monitoring device comprises a detector to detect in real-time obstructions, of terrain type and of human constructions type, in a close environment of the aircraft in a flight situation, a sensor to identify the obstructions at risk calculating identification parameters, a circuit to calculate criticality of the obstructions, a display to display both the obstructions with the identification and criticality parameters of the obstructions, and a generator of alerts to describe the situation according to a combination of the identification and criticality parameters. One or more embodiments of the invention is a monitoring system adapted for zones close to the aircraft and in the flight zones not visible to the crew. One or more embodiments of the invention applies particularly to helicopters executing low-altitude flights. It relates more particularly to military carriers such as rescue carriers.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application claims the benefit of French Patent application No. 08 / 03215, filed Jun. 10, 2008, which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION[0002]The invention relates to the field of aerial navigation aids for the prevention of accidents in which an aircraft which is still manoeuvrable collides with an obstacle. Hereinafter, the term “obstacle” designates any non-natural obstruction present in the environment of the aircraft, and one then speaks notably of human constructions such as buildings or bridges. Moreover, the term “relief” or “terrain” designates obstructions relating to the natural environment such as mountainous zones and more generally the ground.[0003]Through the type of missions carried out, landing and takeoff in zones that are difficult to access, sometimes unprepared, or low-altitude flight, the helicopter, for example, is a craft that is very highly exposed to the risk of c...

AI Technical Summary

Benefits of technology

[0010]The aim of the invention is the improving of safety in situations where the helicopter operates with low lateral and vertical separation margins with respect to fixed or mobile artificial obstacles situated nearby. The aim of the innovation is to present to the crew the situation of the these various elements with respect to that of the aircraft and to produce an alert when the margins are no longer sufficient, so as to allow the crew time to react before the situation becomes critical.

[0012]The invention is advantageous in that it makes it possible to reduce stress to the crew by allowing the crew to avoid entering dangerous situations or by reducing the surprise effect if such a situation arises. It makes it possible notably to afford the crew a synthetic depiction of the close environment of the aircraft at the level of the non-visible zones and also to describe the behaviour of the elements present in this environment. The device according to the invention includes a real-time detection of obstructions at risk and their displacement with respect to the aircraft so as to provide relevant information to the crew allowing them to take the right piloting decisions in the immediate instant. Flight safety is thus greatly improved thereby.

Problems solved by technology

Cases of collision between the craft and an arbitrary obstruction usually occur during the takeoff or landing phases—phases during which the TAWS alert functions are disabled, or in the best of cases, with a sensitivity that is reduced so much that the alert will be delivered too late to save the craft and more particularly the anti-torque device situated on the tail of the helicopter.

Systems of TAWS type, through their use of a digital terrain model, are not capable of detecting mobile obstacles, such as terrestrial vehicles or other aircraft.

It does not make it possible to calculate or to picture the discrepancy with respect to this threshold.

The systems of “HELLAS” type are complex and expensive.

These systems do not generally make it possible to protect the lateral parts and the tailplane of the craft.

The systems of flight control type are also complex and expensive and rely on the possibility offered to them of acting on the control surfaces of the craft.

Not all helicopters may be so equipped.

Moreover these systems, through their corrective action, do not allow the crew to anticipate the situation.

They likewise do not make it possible to protect the lateral parts or the front of the craft and they offer reliable protection only in relation to the ground or obstacles situated under the craft.

They do not protect the craft in relation to mobile obstacles.

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