Abnormal noise determination apparatus and method

Patent metadata

Field	Value
Publication number	US-11361782-B2
Application number	US-202117202113-A
Country	US
Kind code	B2
Filing date	Mar 15, 2021
Priority date	Mar 24, 2020
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An abnormal noise determination apparatus including a microphone array disposed inside a vehicle and an electronic control unit including a microprocessor. The microprocessor is configured to perform acquiring an abnormal noise data on an abnormal noise generated by a sound source disposed in a predetermined position inside the vehicle, the abnormal noise data including an information on a strength and a generation direction of the abnormal noise collected by the microphone array in advance or assumed to be collected by the microphone array; acquiring a traveling noise data including an information on a strength and a generation direction of a traveling noise collected by the microphone array during traveling of the vehicle; and determining whether the abnormal noise is included in the traveling noise of the vehicle, based on the abnormal noise data acquired and the traveling noise data acquired.

First claim

What is claimed is:

1. An abnormal noise determination apparatus, comprising:
a microphone array disposed inside a vehicle and including a plurality of microphones; and
an electronic control unit including a microprocessor and a memory connected to the microprocessor, wherein
the microprocessor is configured to perform:
acquiring abnormal noise data on an abnormal noise generated by a sound source disposed in a predetermined position inside the vehicle, the abnormal noise data including information on a strength and a generation direction of the abnormal noise collected by the microphone array in advance or assumed to be collected by the microphone array;
acquiring traveling noise data including information on a strength and a generation direction of a traveling noise collected by the microphone array during traveling of the vehicle; and
determining whether the abnormal noise is included in the traveling noise of the vehicle, based on the abnormal noise data acquired and the traveling noise data acquired.

2. The abnormal noise determination apparatus according to claim 1 , wherein
the microprocessor is configured to further perform:
generating first sound pressure data indicating the strength of the abnormal noise and first phase difference data indicating a phase difference of the abnormal noise collected by the plurality of microphones in advance or assumed to be collected by the plurality of microphones, based on the abnormal noise data acquired; and
generating second sound pressure data indicating the strength of the traveling noise and second phase difference data indicating a phase difference of the traveling noise collected by the plurality of microphones, based on the traveling noise data acquired, and wherein
the microprocessor is configured to perform
the determining including determining whether the abnormal noise is included in the traveling noise of the vehicle, based on the first sound pressure data, the first phase difference data, the second sound pressure data and the second phase difference data.

3. The abnormal noise determination apparatus according to claim 2 , wherein
the microprocessor is configured to perform
the generating the first sound pressure data and the first phase difference data including converting the first sound pressure data and the first phase difference data into spectrogram data,
the generating the second sound pressure data and the second phase difference data including converting the second sound pressure data and the second phase difference data into spectrogram data, and
the determining including determining whether the abnormal noise is included in the traveling noise of the vehicle based on the spectrogram data converted.

4. The abnormal noise determination apparatus according to claim 1 , wherein
the abnormal noise data is generated based on reference abnormal noise data generated in a part when an abnormal noise generation test is performed in advance outside the vehicle using the part mounted on a predetermined position of the vehicle, a degree of an attenuation of a sound transmitted from the predetermined position to the microphone array inside the vehicle, and normal noise data on a normal noise collected by the microphone array when the vehicle travels under a predetermined condition.

5. The abnormal noise determination apparatus according to claim 4 , wherein
the abnormal noise data is generated by adding the normal noise data to a multiplication value obtained by multiplying the reference abnormal noise data by a transfer function of the sound transmitted from the predetermined position to the microphone array inside the vehicle.

6. The abnormal noise determination apparatus according to claim 4 , wherein
the abnormal noise data includes abnormal noise data acquired by the microphone array when the vehicle travels under the predetermined condition.

7. An abnormal noise determination apparatus, comprising:
a microphone array disposed inside a vehicle and including a plurality of microphones; and
an electronic control unit including a microprocessor and a memory connected to the microprocessor, wherein
the microprocessor is configured to function as:
a first data acquisition unit configured to acquire abnormal noise data on an abnormal noise generated by a sound source disposed in a predetermined position inside the vehicle, the abnormal noise data including information on a strength and a generation direction of the abnormal noise collected by the microphone array in advance or assumed to be collected by the microphone array;
a second data acquisition unit configured to acquire traveling noise data including information on a strength and a generation direction of a traveling noise collected by the microphone array during traveling of the vehicle; and
a determination unit configured to determine whether the abnormal noise is included in the traveling noise of the vehicle, based on the abnormal noise data acquired by the first data acquisition unit and the traveling noise data acquired by the second data acquisition unit.

8. The abnormal noise determination apparatus according to claim 7 , wherein
the microprocessor is further configured to function as:
a first data generation unit configured to generate first sound pressure data indicating the strength of the abnormal noise and first phase difference data indicating a phase difference of the abnormal noise collected by the plurality of microphones in advance or assumed to be collected by the plurality of microphones, based on the abnormal noise data acquired by the first data acquisition unit; and
a second data generation unit configured to generate second sound pressure data indicating the strength of the traveling noise and second phase difference data indicating a phase difference of the traveling noise collected by the plurality of microphones, based on the traveling noise data acquired by the second data acquisition unit, and wherein
the determination unit is configured to determine whether the abnormal noise is included in the traveling noise of the vehicle based on the first sound pressure data and the first phase difference data generated by the first data generation unit and the second sound pressure data and the second phase difference data generated by the second data generation unit.

9. The abnormal noise determination apparatus according to claim 8 , wherein
the first data generation unit is configured to convert the first sound pressure data and the first phase difference data into spectrogram data,
the second data generation unit is configured to convert the second sound pressure data and the second phase difference data into spectrogram data, and
the determination unit is configured to determine whether the abnormal noise is included in the traveling noise of the vehicle, based on the spectrogram data converted in the first data generation unit and the spectrogram data converted in the second data generation unit.

10. The abnormal noise determination apparatus according to claim 7 , wherein
the abnormal noise data is generated based on reference abnormal noise data generated in a part when an abnormal noise generation test is performed in advance outside the vehicle using the part mounted on a predetermined position of the vehicle, a degree of an attenuation of a sound transmitted from the predetermined position to the microphone array inside the vehicle, and normal noise data on a normal noise collected by the microphone array when the vehicle travels under a predetermined condition.

11. The abnormal noise determination apparatus according to claim 10 , wherein
the abnormal noise data is generated by adding the normal noise data to a mu

Assignees

• Honda Motor Co Ltd

Inventors

• Ninomiya Kazushi
• Ishizuka Yasutaka
• Nagata Ayanori
• Iida Toshiki

Classifications

• G01M17/007 Primary

  Wheeled or endless-tracked vehicles (G01M17/08 takes precedence) · CPC title

• H04R3/005

  for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407) · CPC title

• H04R1/406 Primary

  microphones · CPC title

• G01H3/08

  Analysing frequencies present in complex vibrations, e.g. comparing harmonics present {(acoustic presence detection G01V1/001)} · CPC title

• H04R2499/13

  Acoustic transducers and sound field adaptation in vehicles · CPC title