Noise sensing and identifying device and method for civil aircraft

Abstract

The invention discloses a noise sensing and identifying device and a method for a civil aircraft, and the noise sensing and identifying device belongs to the technical field of civil aviation. The device comprises a microphone module, a master control module, a storage module, a sound feature extraction module and a judging module. The method comprises the following steps of: Step 1, extracting noise of aircrafts in different working stations, different directions and different distances of civil aircrafts with different models, and analyzing the noise of the aircrafts to obtain a supporting vector; Step 2, collecting the noise of the aircrafts and analyzing the noise of the aircrafts to obtain a feature vector; and Step 3, carrying out a linear operation for the feature vector and the supporting vector to obtain a judging result. The device provided by the invention integrates functions of sound collection, noise extraction of the aircrafts, feature vector extraction of the noise of the aircrafts, supporting vector training of the noise of the aircrafts and analysis of the noise of the aircrafts, and meanwhile, the device has the characteristic of high timeliness for sensing and identifying the noise of the aircrafts.

Description

technical field [0001] The invention relates to the technical field of civil aviation, in particular to a civil aircraft noise perception and recognition device and method based on a digital signal processing integrated circuit and a field programmable gate array integrated circuit. Background technique [0002] Since the "Eleventh Five-Year Plan", the rapid development of China's civil aviation has attracted worldwide attention. However, the continuous construction and expansion of airports and the continuous growth of air traffic have also made the airport noise problem that has plagued China's civil aviation for a long time more serious. In 2009, the Civil Aviation Administration of China conducted a survey on the noise impact of domestic airports and found that 55 airports had noise problems, and 28 airports had serious noise pollution. Moreover, with the continuous expansion of airport transportation, the level of noise environmental pollution is deteriorating, and the...

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Problems solved by technology

[0004] At present, the domestic airport noise monitoring system has not yet formed a system. The filtering of non-aircraft noise interference in the noise data is still carried out manually. In foreign countries, it is judged by the duration of the aircraft noise exceeding the threshold. This method is for For monitoring points arranged in densely built areas, it is easy to be disturbed by the illusion of prolonged duration caused by repeated reflections of noise between buildings, and this method cannot achieve real-time perception, and it will not be possible to realize the future airport noise system Real-time monitoring, but also can not reduce the data processing and transmission burden of noise monitoring points, resulting in waste of resources

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