Active noise reduction device and active noise reduction method based on engine speed

The invention relates to an active noise reduction technology applied in a vehicle and particularly relates to an active noise reduction device and an active noise reduction method based on engine speed. The device comprises a signal acquiring and processing device and a sound playing device; the no...

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Bibliographische Detailangaben
Hauptverfasser:	ZHU WENBO, WANG YEBIN, CHEN WENHAI, WANG DENGFENG, JIA JIZHAO, ZHU TONGTONG, CHEN SHUMING, SONG SHIZHUANG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL CONTROLLING COMBUSTION ENGINES ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INTERNAL-COMBUSTION PISTON ENGINES LIGHTING MACHINES OR ENGINES IN GENERAL MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MECHANICAL ENGINEERING PHYSICS STEAM ENGINES SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF TESTING WEAPONS
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Beschreibung
Zusammenfassung:	The invention relates to an active noise reduction technology applied in a vehicle and particularly relates to an active noise reduction device and an active noise reduction method based on engine speed. The device comprises a signal acquiring and processing device and a sound playing device; the noise reduction method of the device comprises the following steps: (1) pre-building a corresponding relationship between the engine speed and mechanical noise, air intake noise and air exhaust noise, and storing a nominal noise signal as a reference noise signal; (2) acquiring an engine speed signal by utilizing bus signal reading equipment and acquiring the reference noise signal by the corresponding relationship between the engine speed and the noise; (3) acquiring a secondary noise signal according to the reference noise signal by utilizing an LMS self-adapting filter; (4) playing the secondary noise signal by using the sound playing device so as to counteract the mechanical noise, air intake noise and air exhaus