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Ultrasonic noise cancellation in vehicular passenger compartment

A passenger compartment and ultrasonic technology, applied in the measurement of ultrasonic/sonic/infrasonic waves, vehicle components, vehicle subunit functions, etc., can solve problems such as passenger compartments that cannot be solved

Pending Publication Date: 2019-03-26
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ANC systems do not yet account for inaudible (eg, ultrasonic) sound energy in the passenger compartment

Method used

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  • Ultrasonic noise cancellation in vehicular passenger compartment
  • Ultrasonic noise cancellation in vehicular passenger compartment
  • Ultrasonic noise cancellation in vehicular passenger compartment

Examples

Experimental program
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Embodiment Construction

[0011] refer to figure 1 , shows the first motor vehicle 10 in the vicinity of the second motor vehicle 25 . The vehicle 10 has a passenger compartment 11 providing passenger seating positions 12 and 13 , such as a driver's seat and a front passenger seat, respectively. Vehicle 10 has ultrasonic transceivers 14, 15, and 16 that are located outside cabin 11 and are used as part of a remote sensing system, such as a parking assist system, collision avoidance system, backup warning system, or other advanced driver assistance system. Connected to one or more processors (not shown) to perform sonar functions for detecting nearby objects using reflected ultrasonic waves. Typical ultrasonic sensors that have been commercially used on vehicles emit ultrasound at about 40 kHz to about 45 kHz, but frequencies from 30 kHz up to over 100 kHz may also be used.

[0012] The ultrasonic transceiver 14 emits ultrasonic waves 17 which are shown reflected from an object 18 , with reflected ult...

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PUM

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Abstract

Exposure to ultrasound energy emitted by remote object detection systems on vehicles is reduced for vehicle occupants. An automotive vehicle has a passenger cabin and a remote sensing system includingultrasonic transceivers mounted for sensing external objects. An ultrasonic microphone is disposed to sense an ultrasonic wave entering the passenger cabin at greater than 30 kHz. An antinoise processor calculates an antinoise signal adapted to at least partially cancel the ultrasonic wave at a predetermined location in the cabin. An amplifier is coupled to the processor for amplifying the antinoise signal by a predetermined gain. An ultrasonic speaker is coupled to the amplifier to project the antinoise signal into the predetermined location to attenuate the ultrasonic wave at the predetermined location.

Description

technical field [0001] The present invention relates generally to automotive noise cancellation, and more particularly to reducing inaudible ultrasonic sound energy impinging on vehicle occupants. Background technique [0002] With the continuous development of driver assistance and autonomous features, modern vehicles are adding a large number of sensors to monitor and measure the driving environment. Ultrasonic sensors that use radiated ultrasonic sound to measure short-range distances are inexpensive additions to a wide variety of sensors typically used in passenger vehicles. They are used to enhance or add redundancy to features such as park assist, collision avoidance, and adaptive cruise control. [0003] Passengers cannot hear ultrasonic sound energy because it is beyond the range of human hearing. The biological effects of applying ultrasound directly to the human body (eg, as in ultrasound imaging) are being studied. In the context of a factory / work environment, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R16/037G01H17/00
CPCB60R16/0373G01H17/00G10K2210/1282G10K11/178B60Y2306/09G10K2210/1281G10K2210/3011G10K2210/3044
Inventor 雷蒙德·C·西西亚克凯瑟琳·汉密尔顿马赫达德·达纳斯维韦卡南达·克里希那穆尔希
Owner FORD GLOBAL TECH LLC
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