Noise and vibration sensing

A vibration sensor and noise technology, which is applied in the direction of sounding equipment, active noise control, musical instruments, etc.

Active Publication Date: 2018-06-08
HARMAN BECKER AUTOMOTIVE SYST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, active acoustic technologies for road noise cancellation may require very specific noise and vibration (N&V) sensor arrangements throughout the vehicle structure to observe road noise and vibration signatures

Method used

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Embodiment Construction

[0016] Noise and vibration sensors provide reference inputs to active RNC systems (eg, multi-channel feed-forward active road noise control systems) as the basis for generating noise immunity that reduces or eliminates road noise. Noise and vibration sensors may include acceleration sensors such as accelerometers, force gauges, load cells, and the like. For example, an accelerometer is a device that measures intrinsic acceleration. Intrinsic acceleration is distinguished from coordinate acceleration, which is the rate of change of velocity. Single-axis and multi-axis models of accelerometers are available to detect the magnitude and direction of intrinsic acceleration; and the models can be used to sense orientation, coordinate acceleration, motion, vibration and shock.

[0017] Noise and vibration sensors monitor airborne and structure-borne noise sources to provide the highest possible road noise reduction (cancellation) performance between 0Hz and 1kHz. For example, accel...

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Abstract

An active road-noise control system and method include using a sensor arrangement to generate a first sense signal representative of at least one acceleration, motion and/or vibration that occurs at afirst position on a vehicle body and a second sense signal representative of sound that occurs at a second position within the vehicle body; they also provide a noise-reducing signal by processing the sense signals according to a first or a second mode of operation. They include the generation of noise-reducing sound within the vehicle body at the second position from the noise reducing signal and the operational state of the sensor arrangement; the first sense signal and the second sense signal are processed in the first mode when the sensor arrangement is in a proper operational state and in the second mode when a malfunction of the sensor arrangement has been detected.

Description

technical field [0001] The present disclosure relates to noise and vibration sensor arrangements for road noise control systems, active road noise control systems and noise and vibration measurement methods. Background technique [0002] When land vehicles drive on roads and other surfaces, low frequency noise called road noise is produced. Even in modern vehicles, cabin occupants may be exposed to road noise either through the structure (e.g., via the tire-suspension-body-cabin path) or through the airborne path (e.g., the tire-body-cabin path) transferred to the compartment. It is desirable to reduce road noise experienced by vehicle occupants. Active noise, vibration and harshness (NVH) control technologies, including active road noise control (RNC) systems, can be used to reduce these noise components without changing the structure of the vehicle, as is the case with active vibration technologies. However, active acoustic technologies for road noise cancellation may r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/178
CPCG10K2210/1282G10K2210/501G10K2210/503G10K11/17833G10K11/17835G10K11/17823G10K11/17854G10K11/17879G10K11/17825G10K11/17883G10K2210/1281G10K11/17853G10K2210/12821G10K2210/3028G10K2210/3226
Inventor G.法芬格
Owner HARMAN BECKER AUTOMOTIVE SYST
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