Scaled noise and vibration sensing

• US 10,283,107 B2
• Filed: 10/10/2016
• Issued: 05/07/2019
• Est. Priority Date: 10/16/2015
• Status: Active Grant

• Current Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Original Assignee: Harman Becker Automotive Systems GmbH (Samsung Electronics Co. Ltd.)
• Inventors: Christoph, Markus
• Primary Examiner(s): Lao, Lun-See
• Application Number:
  US15/768,766
• Publication Number:
  US 20180308468A1
• Time in Patent Office: 939 Days
• Field of Search: 381 711- 716, 381 86, 381 941- 944
• CPC Class Codes: G01H 1/12 of longitudinal or not specified vibrations
• CPC Class Codes: G01H 1/14 Frequency
• CPC Class Codes: G01H 1/16 Amplitude
• CPC Class Codes: G01H 3/00 Measuring characteristics of vibrations by using a detector in a fluid G01H7/00, G01H9/00, G01H11/00 take precedence
• CPC Class Codes: G10K 11/178 by electro-acoustically regenerating the original acoustic waves in anti-phase
• CPC Class Codes: G10K 11/1781 characterised by the analysis of input or output signals, e.g. frequency range, modes, transfer functions
• CPC Class Codes: G10K 11/17823 Reference signals, e.g. ambient acoustic environment
• CPC Class Codes: G10K 11/1785 Methods, e.g. algorithms; Devices G10K11/1781, G10K11/1783 take precedence
• CPC Class Codes: G10K 11/17861 using additional means for damping sound, e.g. using sound absorbing panels
• CPC Class Codes: G10K 11/1787 General system configurations
• CPC Class Codes: G10K 2210/1282 Automobiles
• CPC Class Codes: G10K 2210/129 Vibration, e.g. instead of, or in addition to, acoustic noise
• CPC Class Codes: G10K 2210/3213 Automatic gain control [AGC]
• CPC Class Codes: G10K 2210/3229 Transducers
• CPC Class Codes: G10K 2210/501 Acceleration, e.g. for accelerometers
• CPC Class Codes: G10K 2210/512 Wide band, e.g. non-recurring signals
• CPC Class Codes: H03G 5/16 Automatic control
• CPC Class Codes: H03G 5/18 in untuned amplifiers

Abstract

Noise and vibration sensing includes generating with an acceleration sensor a sense signal representative of the acceleration that acts on the acceleration sensor, and processing the sense signal to provide a processed sense signal having an adjustable signal bandwidth and an adjustable signal dynamic. The signal bandwidth extends between a lowest frequency and a highest frequency of the sense signal, and the signal dynamic is the ratio between a maximum amplitude of the sense signal and an output noise floor generated by the acceleration sensor. Noise and vibration sensing further includes adjusting the signal bandwidth and the signal dynamic in accordance with a control signal so that the signal bandwidth increases when the signal dynamic decreases and vice versa.

Claims

1. A scalable noise and vibration sensor comprising:

an acceleration sensor configured to generate a sense signal representative of acceleration that acts on the acceleration sensor; and

a sense signal processing module configured to process the sense signal to provide a processed sense signal having an adjustable signal bandwidth and an adjustable signal dynamic;

wherein

the adjustable signal bandwidth extends between a lowest frequency and a highest frequency of the sense signal, and the signal dynamic is a ratio between a maximum amplitude of the sense signal and an output noise floor generated by the acceleration sensor; and

the sense signal processing module is further configured to adjust the signal bandwidth and the signal dynamic in accordance with a control signal so that the signal bandwidth increases when the signal dynamic decreases and the signal bandwidth decreases when the signal dynamic increases.

2. The sensor of claim 1, wherein the sense signal processing module is further configured to adjust the signal bandwidth and the signal dynamic so that a product of the signal bandwidth and the signal dynamic is constant.

3. The sensor of claim 1, wherein the sense signal processing module comprises:

a first bandpass filter module positioned downstream of the acceleration sensor, the first bandpass filter module having an adjustable first filter bandwidth; and

an amplifier module with an adjustable gain;

wherein

the first filter bandwidth and the gain are adjustable so that the gain increases when the first filter bandwidth decreases and the gain decreases when the first filter bandwidth increases.

4. The sensor of claim 3, wherein the sense signal processing module further comprises;

a first signal sampler positioned downstream of the first bandpass filter module, the first signal sampler having a first sampling rate; and

a first analog-to-digital converter positioned downstream of the first signal sampler, the first analog-to-digital converter being configured to provide a first digital processed sense signal having a first number of bits.

5. The sensor of claim 4, wherein at least one of the first sampling rate and the first number of bits is adjustable so that the at least one of the first sampling rate and the first number of bits increases when the first filter bandwidth decreases and the at least one of the first sampling rate and the first number of bits decreases when the first filter bandwidth increases.

6. The sensor of claim 1, wherein the sense signal processing module comprises:

a first bandpass filter module positioned downstream of the acceleration sensor, the first bandpass filter module having an adjustable first filter bandwidth,

a first signal sampler positioned downstream of the first bandpass filter module, the first signal sampler having a first sampling rate; and

a first analog-to-digital converter positioned downstream of the first signal sampler, the first analog-to-digital converter being configured to provide a first digital processed sense signal having a first number of bits;

wherein

at least one of the first sampling rate and the first number of bits is adjustable so that the at least one of the first sampling rate and the first number of bits increases when the first filter bandwidth decreases and the at least one of the first sampling rate and the first number of bits decreases when the first filter bandwidth increases.

7. The sensor of claim 6, wherein the sense signal processing module further comprises a parallel -to-serial data converter positioned downstream of a first analog-to-digital converter or a second analog-to-digital converter.

8. A noise cancellation arrangement comprising a road noise cancellation system, an engine noise control system, and noise and vibration sensor according to claim 1, the noise and vibration sensor being connected to the road noise cancellation system and the engine noise control system.

9. A noise and vibration sensing method comprising:

generating with an acceleration sensor, a sense signal representative of an acceleration that acts on the acceleration sensor; and

processing the sense signal to provide a processed sense signal having an adjustable signal bandwidth and an adjustable signal dynamic;

wherein

the signal bandwidth extends between a lowest frequency and a highest frequency of the sense signal, and the signal dynamic is a ratio between a maximum amplitude of the sense signal and an output noise floor generated by the acceleration sensor; and

adjusting the signal bandwidth and the signal dynamic in accordance with a control signal so that the signal bandwidth increases when the signal dynamic decreases and the signal bandwidth decreases when the signal dynamic increases.

10. The method of claim 9, wherein processing the sense signal comprises adjusting the signal bandwidth and the signal dynamic so that a product of the signal bandwidth and signal dynamic is kept constant.

11. The method of claim 9, wherein processing the sense signal comprises:

filtering with a first bandpass filter having an adjustable first filter bandwidth downstream of the acceleration sensor; and

signal amplifying with an adjustable gain;

wherein the first filter bandwidth and the gain are adjustable so that the gain increases when the first filter bandwidth decreases and the gain decreases when the first filter bandwidth increases.

12. The method of claim 11, wherein processing the sense signal comprises:

sampling with a first signal sampler having a first sampling rate positioned downstream of the first bandpass filter; and

converting, with a first analog-to-digital converter positioned downstream of the first signal sampler, the first analog-to-digital converter being configured to provide a first digital processed sense signal having a first number of bits.

13. The method of claim 12, wherein at least one of the first sampling rate and first number of bits is adjustable so that the at least one of the first sampling rate and the first number of bits increases when the first filter bandwidth decreases and the at least one of the first sampling rate and the first number of bits decreases when the first filter bandwidth increases.

14. The method of claim 9, wherein processing the sense signal further comprises;

filtering, with a first bandpass filter positioned downstream of the acceleration sensor, the first bandpass filter having an adjustable first filter bandwidth;

sampling, with a first signal sampler having a first sampling rate that is positioned downstream of the first bandpass filter; and

converting, with a first analog-to-digital converter that is positioned downstream of the first signal sampler, the first analog-to-digital converter being configured to provide a first digital processed sense signal having a first number of bits;

wherein

at least one of the first sampling rate and the first number of bits is adjustable so that the at least one of the first sampling rate and the first number of bits increases when the first filter bandwidth decreases and the at least one of the first sampling rate at the first number of bits decreases when the first filter bandwidth increases.

15. The method of claim 9, wherein processing the sense signal further comprises:

converting, with a parallel-to-serial data converter positioned downstream of a first analog-to-digital converter or a second analog-to-digital converter.

16. A scalable noise and vibration sensor comprising:

an acceleration sensor configured to generate a sense signal representative of acceleration that acts on the acceleration sensor; and

a sense signal processing module configured to process the sense signal to provide a processed sense signal having a signal bandwidth and a signal dynamic;

wherein

the signal bandwidth extends between a lowest frequency and a highest frequency of the sense signal, and the signal dynamic is a ratio between a maximum amplitude of the sense signal and an output noise floor provided by the acceleration sensor; and

the sense signal processing module is further configured to adjust the signal bandwidth and the signal dynamic based on a control signal so that the signal bandwidth increases when the signal dynamic decreases and the signal bandwidth decreases when the signal dynamic increases.

17. The sensor of claim 16, wherein the sense signal processing module is further configured to adjust the signal bandwidth and the signal dynamic so that a product of the signal bandwidth and the signal dynamic is constant.

18. The sensor of claim 16, wherein the sense signal processing module comprises:

a first bandpass filter module positioned downstream of the acceleration sensor, the first bandpass filter module having an adjustable first filter bandwidth; and

an amplifier module with an adjustable gain;

wherein

the first filter bandwidth and the gain are adjustable so that the gain increases when the first filter bandwidth decreases and the gain decreases when the first filter bandwidth increases.

19. The sensor of claim 18, wherein the sense signal processing module further comprises;

a first signal sampler positioned downstream of the first bandpass filter module, the first signal sampler having a first sampling rate; and

a first analog-to-digital converter positioned downstream of the first signal sampler, the first analog-to-digital converter being configured to provide a first digital processed sense signal having a first number of bits.

20. The sensor of claim 19, wherein at least one of the first sampling rate and the first number of bits is adjustable so that the at least one of the first sampling rate and the first number of bits increases when the first filter bandwidth decreases and the at least one of the first sampling rate and the first number of bits decreases when the first filter bandwidth increases.