Street lamp with functions of positioning and identifying sound

Abstract

The invention relates to a street lamp with functions of positioning and identifying sound. The street lamp comprises a street lamp pole and a street lamp shade, wherein the street lamp shade extendsout of the street lamp pole; a lamp body is arranged in the street lamp shade; the energy of the street lamp is supplied by alternating current; the street lamp also comprises one or more groups of microphone arrays arranged on the street lamp pole and / or the street lamp shade; one or more groups of microphone arrays are connected with a sound source calculation system; the sound source calculation system comprises a data collection module, a signal processing module and a communication module. According to the street lamp, sound signals are detected by an energy-zero ratio detection method; the influence of the noise of the outdoor environment on the signal detection can be reduced; the detection efficiency is improved; a sound signal identification algorithm is used for combining time-frequency spectrum features with spatial information features; a deep learning neural network model is used for training and testing, so that discrimination of various sound events on the road can be achieved; a signal parameter estimation method based on a rotational invariance technique is used for positioning sound sources; the method is small in calculation amount and high in resolution ratio, and is capable of accurately discriminating positions of the sound sources.

Description

technical field [0001] The invention belongs to the field of public safety monitoring, in particular to a street light pole with sound positioning and identification functions. Background technique [0002] As one of the important sources of human perception of the environment, sound has the characteristics of being unaffected by light, long detection distance, and rich in information. Effective use of these sound information can effectively improve the intelligence of public safety. [0003] But at present, in the field of public security monitoring, most of them only use video surveillance systems to detect abnormal situations. Video surveillance systems mainly consist of video cameras and monitoring display terminals, while research on audio monitoring is relatively weak. The function of the equipment is single, and the degree of intelligence is not high. Therefore, using sound as an environmental perception technology can provide people with intelligent monitoring metho...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a street light pole with sound positioning and recognition functions, which uses sound source localization algorithm to calculate the sound source position of abnormal sound events on the ground or in the air, and transmits the result of the calculation to a designated device, so as to solve the common problems in the prior art. The security monitoring method is single, and the sound information cannot be effectively collected and utilized

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