Intelligent control system for subway noises

Abstract

The invention discloses an intelligent control system for subway noises. The intelligent control system comprises a control module, an acquisition module and a noise reduction module, wherein the control module is electrically connected with the acquisition module and the noise reduction module; the acquisition module is arranged in a carriage base plate and is used for acquiring noise informationof frictional vibration radiation of wheels and rails; the noise reduction module is arranged in the carriage base plate and / or the bottom of a carriage seat and is used for giving out sound offsetting with frictional vibration radiation noises of the wheels and the rails. In the intelligent control system disclosed by the invention, the acquisition module is arranged on a noise path of the frictional vibration radiation of the wheels and the rails; the control module calculates out information such as the frequency and the amplitude of noises according to noise information collected by the acquisition module and transmits a signal to the noise reduction module; the noise reduction module gives out opposite noises of which the frequency and the amplitude are identical with those of a noise signal and the phase is opposite to that of the noise signal; noises and the opposite noises are offset so as to reduce the noises, received by the carriage, of the frictional vibration radiation noises of the wheels and the rails.

Description

technical field [0001] The invention belongs to the technical field of active noise reduction, and in particular relates to an intelligent control system for subway noise. Background technique [0002] The existing subway noise reduction technology mainly focuses on changing the vehicle wheel structure, related track structure, anti-shake fasteners and car body structure. The noise reduction technology in these aspects needs to modify the subway track structure and car body structure. For the existing subway lines that have been built, the cost of improving the noise reduction environment is relatively high. However, the subway noise reduction technology has relatively little use of "anti-noise" technology. In this new noise reduction method, Professor Higby of the United States has been able to successfully deal with the low-frequency noise and vibration of large diesel engines through anti-noise technology. However, since the low-frequency noise of the diesel engine is re...

AI Technical Summary

Problems solved by technology

However, since the low-frequency noise of the diesel engine is relatively fixed, and the noise inside the subway car is more complicated, and the noise of the train wheel and rail is affected by the train speed and the curvature of the rail, if you need to use this anti-noise technology for subway noise reduction, you must design it separately Noise control system, but the existing technology still lacks real-time monitoring and control and the noise elimination technology for high-frequency noise needs to be improved

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