The invention belongs to the technical field of railway vehicles, and provides a bottom suspension type active noise reduction back cushion and a railway vehicle cab for active noise reduction by adopting the mode. The invention aims to solve the problem of noise reduction of low and medium frequency noise in the subway vehicle cab. The active noise reduction system comprises the reference sensor, an error sensor, a loudspeaker and a signal processor in communication connection with the sensors and the loudspeaker. And the signal processor receives an environment noise signal and a feedback correction signal transmitted by the sensor, and controls the loudspeaker to emit noise sound waves with the same frequency and amplitude but opposite phases, so that noise transmitted into ears of a passenger is inhibited. Besides, an electric lifting device is arranged in a control box at the top of the cab, a back cushion is controlled to reach the head position of a driver and an active noise reduction system is started when noise reduction is needed, and therefore noise in the cab of the metro vehicle is reduced, and driving comfort is improved.
本发明属于轨道车辆技术领域,提供了一种下悬式主动降噪靠枕和采用这样方式进行主动降噪的轨道车辆驾驶舱。本发明旨在解决地铁车辆驾驶室内中低频噪声的降噪问题。本发明的主动降噪系统,包括所述参考传感器、误差传感器、扬声器,以及和传感器、扬声器通信连接的信号处理器。所述信号处理器接收传感器传入的环境噪声信号和反馈修正信号,并控制扬声器发出频率与幅值相同,但是相位相反的噪声声波,从而抑制传入乘坐人员耳中的噪声。此外,驾驶舱顶的控制箱内装有电动升降装置,在有降噪需求时控制靠枕至驾驶员头部位置并启动主动降噪系统,从而降低地铁车辆驾驶舱内的噪声,以提高驾驶舒适性。
Bottom suspension type active noise reduction back cushion
一种下悬式主动降噪靠枕
2021-06-01
Patent
Elektronische Ressource
Chinesisch
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