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1. 发明授权

US06529838B1 Method of and apparatus for predicting vehicle interior noise 失效
标题翻译：车内噪声预测方法及装置
公开(公告)号：US06529838B1
公开(公告)日：2003-03-04
申请号：US09097588
申请日：1998-06-16
申请人： Mamoru Horiuchi , Akira Suto , Yuichi Yoshimura , Ken Kudo , Tsuyoshi Yamashita
发明人： Mamoru Horiuchi , Akira Suto , Yuichi Yoshimura , Ken Kudo , Tsuyoshi Yamashita
IPC分类号： G01M1702
CPC分类号： G01H3/08 , G01H17/00
摘要： A jig is successively mounted on each of the four wheels of a vehicle. The jig is struck in three orthogonal directions independently, and at the same time, a microphone inside the vehicle measures the sound pressure of noise generated due to the exciting force. An FFT analyzer operates a frequency response function from the exciting force to the sound pressure. In a drum testing machine, a tire to be subject to noise prediction is mounted on a shaft, the tire is rotated, and the axial force in the three orthogonal directions is measured. The axial force signal is input to the FFT analyzer and the auto power spectrum in the three orthogonal directions and the cross power spectrum between two different axial directions are operated. The frequency response functions are synthesized with the auto power and cross power spectrums, and the power spectrum of the road noise is operated.
摘要翻译：一个夹具连续地安装在车辆的四个车轮的每一个上。夹具在独立的三个正交方向上被撞击，同时车内的麦克风测量由于激励力而产生的噪声的声压。 FFT分析仪从激励力到声压操作频率响应功能。在滚筒试验机中，将要进行噪声预测的轮胎安装在轴上，轮胎旋转，并且测量三个正交方向上的轴向力。轴向力信号输入到FFT分析仪，三个正交方向的自动功率谱和两个不同轴向的交叉功率谱都被运行。频率响应功能由自动功率和交叉功率谱合成，运行道路噪声的功率谱。

2. 发明授权

US4897672A Method and apparatus for detecting and compensating light emission from an LED array 失效
标题翻译：用于检测和补偿来自LED阵列的发光的方法和装置
公开(公告)号：US4897672A
公开(公告)日：1990-01-30
申请号：US210335
申请日：1988-06-23
申请人： Mamoru Horiuchi , Yoshinori Wada , Hirotoshi Shimizu , Yuji Uehara , Masahiro Wanou , Masatoshi Kimura
发明人： Mamoru Horiuchi , Yoshinori Wada , Hirotoshi Shimizu , Yuji Uehara , Masahiro Wanou , Masatoshi Kimura
IPC分类号： G06K15/12
CPC分类号： G06K15/1247 , G06K15/027
摘要： A checking method for a device having a plurality of light emitting elements, especially an LED array installed in electronic printing equipment. The check is done while the LED array is mounted in the equipment and does not require removal thereof. The check is done in a short time period, so it can be done during a period of page change of the printer, without disturbing the operation of the printer. Each of the LEDs are lighted one by one with a pulse. The output emission of the array is detected by a photoelectric detector which is positioned to detect the emission from any of the LEDs. The output of the detector becomes a burst of pulses, each of the pulses representing the emission property of a corresponding LED. Each pulse is converted into a digital signal and stored in a RAM as emission data. The emission data is fed back to the driver of each LED to compensate for differences in the emission characteristics of the LEDs. This improves the uniformity of the output image the electronic printer. Each time of the check is performed, the RAM is rewritten. Thereby, a change in the emission data indicates a change or degradation of one or more of the LEDs. This enables one to forecast the life expectancy of the LED array, and maintenance of the printer becomes easier.

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