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Pipeline noise control method and device based on multi-model self-adaptive switching

A technology of adaptive switching and noise control, applied in the direction of pipe components, pipes/pipe joints/pipes, mechanical equipment, etc., to achieve a wide range of applications, easy implementation, and easy installation.

Inactive Publication Date: 2016-07-20
HENAN INST OF ENG
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Problems solved by technology

Many researchers have proposed many noise active control methods to realize the online identification of the secondary channel and the real-time suppression of noise, but when the model of the secondary channel changes suddenly, the existing methods are difficult to realize the real-time and accurate identification of the secondary channel model Real-time effective control with noise

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  • Pipeline noise control method and device based on multi-model self-adaptive switching
  • Pipeline noise control method and device based on multi-model self-adaptive switching
  • Pipeline noise control method and device based on multi-model self-adaptive switching

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Embodiment

[0022] Example: see figure 1 , figure 2 , image 3 and Figure 4 , in the figure, 1-sound velocity sensor, 2-reference noise sensor, 3-error noise sensor, 4-noise suppression speaker, 5-noise suppression power amplifier, 6-embedded noise active controller, 7-pipeline.

[0023] A pipeline noise control method based on multi-model adaptive switching, the steps of which are:

[0024] a. A sound velocity sensor 1, a reference noise sensor 2, an error noise sensor 3 and a noise suppression speaker 4 are respectively installed at different positions inside the pipeline 7;

[0025] b. The pseudo-random noise is played in the pipeline 7 through the noise suppression speaker 4, and the active controller collects the detection signal of the error noise sensor 3, and obtains ten fixed parameter models S through the least mean square algorithm and comparing different temperature values 1 (z) to S 10 (z), and build a multi-model set containing ten fixed-parameter models;

[0026] c....

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Abstract

The invention discloses a pipeline noise control method and device based on multi-model self-adaptive switching. The control device comprises a pipeline, a sound speed sensor, a noise suppression loudspeaker, a noise suppression power amplifier and an active controller; the active controller, a self-adaptive filter and a peripheral circuit form the active embedded noise controller, and the active embedded noise controller is connected to an error noise sensor, a reference noise sensor, the sound speed sensor and the noise suppression loudspeaker, wherein the error noise sensor, the reference noise sensor, the sound speed sensor and the noise suppression loudspeaker are arranged at different positions of the inner wall of the pipeline. According to the pipeline noise control method and device, the multi-model switching strategy is adopted for adapting to fast change of secondary channel models, and the instantaneity requirement of multi-model switching can be met; externally-arranged measuring equipment is used for realizing multi-model set switching fast; the self-adaptive filter is adopted for realizing real-time pipeline noise suppression according to the destructive interference principle of sound waves.

Description

Technical field: [0001] The invention relates to a noise control device, in particular to a pipeline noise control method and device based on multi-model adaptive switching. Background technique: [0002] Currently widely used noise control technologies are mainly divided into two types: passive noise control and active noise control. Among them, active noise control, that is, active noise control technology is the current research hotspot. Active noise control technology mainly uses the principle of destructive interference of sound waves to suppress noise. Since the noise source and the acoustic environment are usually time-varying, especially the secondary path between the noise-suppressing loudspeaker and the error-noise sensor changes with temperature and sound propagation conditions. Many researchers have proposed many noise active control methods to realize the online identification of the secondary channel and the real-time suppression of noise, but when the model o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L55/033
CPCF16L55/0333
Inventor 李小魁陈素霞张秋慧陈朝阳郭壮志闫絮任磊宋高峰林伟鹏韩路恒
Owner HENAN INST OF ENG
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