Linear array interference voice warning acoustic radar capable of being carried by unmanned aerial vehicle in anti-epidemic process

Abstract

The invention discloses a linear array interference voice warning acoustic radar capable of being carried by an unmanned aerial vehicle in an anti-epidemic process, and relates to the technical field of public health and epidemic prevention. The linear array interference voice warning acoustic radar capable of being carried by the unmanned aerial vehicle comprises the unmanned aerial vehicle and an acoustic radar arranged on an unmanned aerial vehicle carrying platform, the acoustic radar comprises an H-shaped double-line array sound source, the H-shaped double-line array sound source comprises a line array sound source I, a line array sound source II and a fixing shaft penetrating through the line array sound source I and the line array sound source II for connection, and one end of the fixing shaft is fixed to the unmanned aerial vehicle carrying platform through a bearing. According to the radar, constructive interference high-frequency sound has a high sound pressure level, people outside a fixed-point directional area can only hear fuzzy low-frequency sound, the method does not contribute to measurement of a sound level meter, noise pollution is reduced, only voice warning is conducted on a target individual in a targeted mode, and management and control are scientific and reasonable.

Description

technical field [0001] The invention relates to the technical fields of public health and epidemic prevention, in particular to a line array interference voice warning radar that can be carried by drones in anti-epidemic. Background technique [0002] At present, common drone warning systems mostly use tweeters to broadcast warnings to crowded places, sports competition audience areas, residential areas and villages, etc. However, there are two major technical problems: [0003] 1. The tweeter itself is the source of environmental noise. It is usually very close to the ground when performing duties, and the tweeter has a high sound power level. According to relevant tests, the Lw can reach 100dB (1 meter away from the sound source). Therefore, the contribution to environmental noise can reach more than 85dB when tested at a distance of 1.2 meters from the ground (national testing standard). However, the above-mentioned environmental standards require 40-60dB, so such a UAV s...

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Problems solved by technology

[0003] 1. The tweeter itself is the source of environmental noise. It is usually very close to the ground when performing duties, and the tweeter has a high sound power level. According to relevant tests, the Lw can reach 100dB (1 meter away from the sound source). Therefore, the contribution to environmental noise can reach more than 85dB when tested at a distance of 1.2 meters from the ground (national testing standard). However, the above-mentioned environmental standards require 40-60dB, so such a UAV system will become a noise that seriously pollutes the environment. source;

[0004] 2. Since there are only a small number of target persons who do not obey the law and obey the warnings in a given area, and most law-abiding people also have to receive high-noise warnings, such control is neither scientific nor reasonable

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