[특허]Abnormal noise inspection method for anti-vibration device for vehicle use

Abnormal noise inspection method for anti-vibration device for vehicle use 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01M-017/04 G01M-007/02
출원번호	US-0044023 (2008-03-07)
등록번호	US-8214104 (2012-07-03)
우선권정보	JP-2007-108287 (2007-04-17); JP-2007-108289 (2007-04-17)
발명자 / 주소	Ohta, Katsutoshi Katayama, Minoru Moriya, Takashi Fujinami, Yoshinori Miyake, Tetsuya
출원인 / 주소	Kabushiki Kako Co., Ltd.
대리인 / 주소	Studebaker & Brackett PC
인용정보	피인용 횟수 : 0 인용 특허 : 49

초록 ▼

In an abnormal noise inspection method for an anti-vibration device for vehicle use, it is determined whether, during travel of a vehicle in which a supported member is supported to the vehicle body by an anti-vibration device, abnormal noise occurs or not in the passenger compartment owing to the anti-vibration device. The method includes: an input step of mounting to a shaker the anti-vibration device before it is assembled into the vehicle and then inputting vibrations in a predetermined pattern to a supported member-side mounting part of the anti-vibration device; a measurement step of measuring, during the inputting of vibrations, a transmission force output from a vehicle body-side mounting part of the anti-vibration device; an analysis step of frequency analyzing time-series data on the measured transmission force to obtain a power spectrum of the transmission force; and a determination step of estimating, based on the power spectrum of the transmission force and according to a predetermined evaluation criterion, whether a vehicle produces abnormal noise in the passenger compartment when it runs with the anti-vibration device mounted thereon.

대표청구항 ▼

1. An abnormal noise inspection method for an anti-vibration device for vehicle use, the method comprising: mounting to a shaker an anti-vibration device including a vehicle body-side mounting part and a supported member-side mounting part;inputting vibrations in a predetermined pattern to the supported member-side mounting part of the anti-vibration device;measuring, during the inputting of vibrations, a transmission force output from the vehicle body-side mounting part of the anti-vibration device;frequency analyzing time-series data on the transmission force to obtain a power spectrum of the transmission force; anddetermining an estimation, based on the power spectrum of the transmission force and according to a predetermined evaluation criterion, whether a vehicle produces abnormal noise in a passenger compartment owing to the anti-vibration device when the vehicle runs with the anti-vibration device mounted thereon. 2. The abnormal noise inspection method of claim 1, wherein in frequency analyzing time-series data on the transmission force, the power spectrum of the transmission force is used to calculate an overall power in a particular frequency interval including a frequency of abnormal noise to be produced in the passenger compartment, andthe determining an estimation whether abnormal noise occurs or not in the passenger compartment is based on whether the overall power is above a predetermined threshold. 3. The abnormal noise inspection method of claim 2, wherein, in inputting vibrations, sine-wave vibrations of constant amplitude and constant frequency are input to the supported member-side mounting part of the anti-vibration device. 4. The abnormal noise inspection method of claim 1, wherein in frequency analyzing, the power spectrum of the transmission force is subjected to a peak hold processing and the power spectrum, after being subjected to the peak hold processing, is used to calculate an overall power in a particular frequency interval including a frequency of abnormal noise to be produced in the passenger compartment, andthe determining an estimation whether abnormal noise occurs or not in the passenger compartment is based on whether the overall power is above a predetermined threshold. 5. The abnormal noise inspection method of claim 4, wherein, in inputting vibrations, sine-wave vibrations of constant amplitude of which frequency is swept over a predetermined range are input to the supported member-side mounting part of the anti-vibration device.

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