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公开(公告)号：US3793627A
公开(公告)日：1974-02-19
申请号：US3793627D
申请日：1972-06-28
Applicant: GEN ELECTRIC
CPC classification number: G01P15/09 , B23Q17/0971 , B23Q17/098 , G01N2291/02827
Abstract: A cutting tool wear signal is obtained in known manner by sensing the sonic vibrations generated by the cutting action and extracting the high frequencies indicative of cutting tool wear. A chipped tool causes a rapid increase or decrease in the gradually rising averaged tool wear signal. The detection circuit detects this rapid increase or decrease with provision for rejecting the starting and stopping transients in the tool wear signal. The system is compatible with sonic detection of an excessively worn cutting tool.
Abstract translation: 通过感测由切割动作产生的声音振动并提取表示切削刀具磨损的高频，以已知的方式获得切削刀具磨损信号。 刀具磨损信号逐渐上升，切削刀具会迅速增加或减少。 检测电路检测到这种快速增加或减少，提供了拒绝刀具磨损信号中的起动和停止瞬变。 该系统与过度磨损的切削工具的声波检测兼容。
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公开(公告)号：US3781782A
公开(公告)日：1973-12-25
申请号：US3781782D
申请日：1972-10-20
Applicant: GEN ELECTRIC
CPC classification number: G01V1/001 , G01S3/805 , Y10S367/905
Abstract: A highly directive, curved broadside array and method for its use to measure noise originating in a localized region of a complex extended noise source such as a jet engine. The array is mounted for scanning at a predetermined range distant from the source, and comprises a single row of microphones with a curvature conforming to the wavefronts of the spherical sound waves in the far field. The received signals are preferably summed, with shading if desired for increased side lobe suppresion, and bandpass filtered to extract broadband noise and pure tones. A technique for minimizing the number of microphones is given.
Abstract translation: 一种高度指令性的弯曲宽边阵列及其用于测量源自诸如喷气发动机的复杂扩展噪声源的局部区域的噪声的方法。 该阵列被安装用于远离源极的预定范围进行扫描，并且包括具有符合远场中的球面声波的波前的曲率的单行麦克风。 接收到的信号优选地与阴影相加，如果需要增加旁瓣抑制，并且经过滤波以提取宽带噪声和纯音。 给出了一种最小化麦克风数量的技术。
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