A kind of helicopter anti-collision warning system and method

Abstract

The invention belongs to the technical field of signal processing, and discloses a helicopter anti-collision warning system and method. The system comprises: at least N receiving devices, in a formulaas described in the specification, W represents the main lobe azimuth width of a unidirectional microphone, and the N receiving devices are mounted on a helicopter fuselage and uniformly distributedin different directions of the same level; each receiving device includes a processor, and an omnidirectional microphone and a unidirectional microphone which are electrically connected to the processor, and the processor is electrically connected to an alarm in a cabin and a flight control computer; the direction of the unidirectional microphone in each receiving device is directed outward alongthe normal direction of the surface of the helicopter fuselage, and the difference in pointing angles of the unidirectional microphones of two adjacent receiving devices is less than or equal to W; and the omnidirectional microphone in each receiving device is close to the helicopter fuselage. The system and the method can effectively detect obstacles existing around the helicopter while reducingthe cost, and have high reliability.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a system and method for detecting surrounding obstacles by using the noise emitted by the helicopter itself for anti-collision warning. Background technique [0002] At present, helicopters have been widely used in fields such as transportation, medical assistance, fire fighting and rescue, anti-smuggling and anti-drugs, sightseeing and tourism, and agricultural spraying, serving various sectors of the national economy. However, due to the limited vision of pilots and the complex and changeable operating environment of helicopters, collisions between helicopters and buildings, slopes of complex mountains, and trees are common, and even tragedies of aircraft crashes and fatalities often occur. Obviously, it is of great significance to study the collision avoidance system and method that detects the surrounding obstacles of the helicopter and prompts the pilot to avoid th...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a helicopter collision avoidance warning system and method, which can overcome the defects of poor reliability and high cost of existing systems and methods, and can effectively detect obstacles existing around the helicopter while reducing costs , and high reliability

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