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公开(公告)号：US5925821A
公开(公告)日：1999-07-20
申请号：US92960
申请日：1998-06-08
申请人： Philippe Bousquet
发明人： Philippe Bousquet
CPC分类号： G01H3/12
摘要： For performing a noise measurement in a pipe (16) traversed by a fluid such as air, in the pipe is placed a measuring device comprising a pipe section (10) having the same cross-section and in which is formed an elongated slot (18). The slot (18) is covered with a resistive material (24) and capped by a cavity (26). The ends of the cavity form an acute angle of at the most approximately 7.degree. relative to the axis of the pipe section (10). One or more microphones (34) are installed on the cavity (26), facing the slot (18), so that its diaphragm (36) is flush with the inner face of the cavity.
摘要翻译： 为了在由诸如空气的流体穿过的管道（16）中进行噪声测量，在管中放置一个测量装置，该测量装置包括具有相同横截面的管段（10），其中形成有细长槽（18 ）。 狭槽（18）被电阻材料（24）覆盖并被空腔（26）封盖。 空腔的端部相对于管段（10）的轴线形成最多约7度的锐角。 一个或多个麦克风（34）安装在空腔（26）上，面向槽（18），使得其隔膜（36）与空腔的内表面齐平。
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公开(公告)号：US5897606A
公开(公告)日：1999-04-27
申请号：US572674
申请日：1995-12-14
申请人： Shinsuke Miura , Takeshi Itoi , Shuichi Yabushita
发明人： Shinsuke Miura , Takeshi Itoi , Shuichi Yabushita
CPC分类号： G01P1/127
摘要： In a method for storing vibration waveform data sequentially detected by a vibration sensor. The vibration storing method includes detection of a reference level terminal point (P.sub.3) between a preestablished reference level and a vibration waveform. The detected reference level terminal point serves as a trigger. Also, vibration waveform data from a predetermined point (P.sub.0) before a reference level starting point (P.sub.1) to a predetermined point (P.sub.4) after the reference level terminal point (P.sub.3) are stored in a memory. A first preliminary memory and a second preliminary memory are utilized so that the vibration waveform data from those two memories are alternately transferred and stored.
摘要翻译： 一种用于存储由振动传感器顺序检测的振动波形数据的方法。 振动存储方法包括检测预先建立的基准电平和振动波形之间的基准电平端点（P3）。 检测到的参考电平终端用作触发。 此外，从基准电平起点（P1）到参考电平终点（P3）之后的预定点（P4）的预定点（P0）的振动波形数据存储在存储器中。 利用第一初步存储器和第二初步存储器，以便交替地传送和存储来自这两个存储器的振动波形数据。
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公开(公告)号：US5493511A
公开(公告)日：1996-02-20
申请号：US988084
申请日：1992-12-08
CPC分类号： B06B1/045 , G01H11/02 , G01N29/12 , G01N29/2412 , G01N2203/0062 , G01N2291/014 , G01N2291/0237 , G01N2291/0258 , G01N2291/0427 , G01N2291/105
摘要： A device and method are provided which non-destructively detect crack length and crack geometry in thin metallic plates. A non-contacting vibration apparatus produces resonant vibrations without introducing extraneous noise. Resulting resonant vibration shifts in cracked plates are correlated to known crack length in plates with similar resonant vibration shifts. In addition, acoustic emissions of cracks at resonance frequencies are correlated to acoustic emissions from known crack geometries.
摘要翻译： 提供了一种非破坏性地检测薄金属板中的裂纹长度和裂缝几何形状的装置和方法。 非接触式振动装置产生共振振动而不引入外来噪声。 裂纹板中产生的共振振动偏移与具有类似共振振动位移的板中已知的裂纹长度相关。 此外，谐振频率处的裂纹的声发射与已知裂纹几何形状的声发射相关。
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公开(公告)号：US5007292A
公开(公告)日：1991-04-16
申请号：US435841
申请日：1989-11-13
摘要： The multicomponent transducer of the present invention comprises a housing interior surfaces forming an enclosed cavity and a single inertial mass immersed in a magnetic fluid contained therein. The inertial mass is levitated in the magnetic fluid by means of ferrohydrodynamic forces. The housing cavity and the inertial mass are generally spherical in shape such that the inertial mass is substantially unconstrained with respect to the directions of motion to which it is responsive. The multicomponent transducer also includes a motion sensing system for sensing selected components of motion of the inertial mass and for generating signals representative of the magnitude and periodicity of the relative motion of the inertial mass with respect to the housing along one or more separate axes. The multicomponent transducer of the present invention has amplitude and phase responses similar to those of conventional transducers.
摘要翻译： 本发明的多组分换能器包括形成封闭空腔的壳体内表面和浸入其中包含的磁性流体中的单个惯性体。 惯性质量通过铁氢力动力悬浮在磁性流体中。 壳体空腔和惯性块通常是球形的，使得惯性质量相对于其响应的运动方向基本上是不受约束的。 多组分换能器还包括运动感测系统，用于感测所选择的惯性质量分量，并且产生表示惯性质量相对于壳体沿着一个或多个单独轴线的相对运动的大小和周期性的信号。 本发明的多组分换能器具有类似于常规换能器的振幅和相位响应。
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95.发明授权
公开(公告)号：US4922757A
公开(公告)日：1990-05-08
申请号：US205770
申请日：1988-06-13
摘要： An apparatus for detecting blade passing times includes a sensor for producing an input signal each time a blade passes the sensor. A zero crossing detector produces an output signal each time the input signal crosses a reference axis. A phase shifter shifts the phase of the input signal to produce a gating signal coinciding with the expected arrival time of the blade at the sensor. A gating device is responsive to the gating signal for conducting output signals which occur during the expected arrival time of the blade at the sensor.
摘要翻译： 用于检测刀片通过次数的装置包括每当刀片通过传感器时产生输入信号的传感器。 零交叉检测器每当输入信号与基准轴交叉时产生输出信号。 移相器移位输入信号的相位以产生与传感器上的叶片的预期到达时间一致的选通信号。 选通装置响应门控信号用于传导在刀片在传感器的预期到达时间期间发生的输出信号。
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公开(公告)号：US4905517A
公开(公告)日：1990-03-06
申请号：US239367
申请日：1988-08-31
摘要： The multicomponent transducer of the present invention comprises a housing having interior surfaces forming an enclosed cavity and a single inertial mass immersed in a magnetic fluid contained therein. The inertial mass is levitated in the magnetic fluid by means of ferrohydrodynamic forces. The housing cavity and the inertial mass are generally spherical in shape such that the inertial mass is substantially unconstrained with respect to the directions of motion to which it is responsive. The multicomponent transducer also includes motion sensing means for sensing selected components of motion of the inertial mass and for generating signals representative of the magnitude and periodicity of the relative motion of the inertial mass with respect to the housing along one or more separate axes. The multicomponent transducer of the present invention has amplitude and phase responses similar to those of conventional transducers.
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公开(公告)号：US4827435A
公开(公告)日：1989-05-02
申请号：US930215
申请日：1986-11-12
摘要： A blade pitch measurement apparatus comprises first means for providing an indication of the instantaneous angular position of the rotor relative to a reference location and second means for providing an indication of the passage of a tenon through a selected location about the rotor. A third means is operatively coupled to and responsive to the indications provided by the first and second means for providing an indication of the angular position of each tenon and for computing blade pitch. A method of measuring blade pitch is also disclosed.
摘要翻译： 叶片桨距测量装置包括用于提供转子相对于参考位置的瞬时角位置的指示的第一装置和用于提供榫眼通过围绕转子的选定位置的指示的第二装置。 第三装置可操作地耦合到并响应于由第一和第二装置提供的指示，用于提供每个榫的角位置的指示和用于计算叶片间距。 还公开了一种测量叶片间距的方法。
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公开(公告)号：US4766771A
公开(公告)日：1988-08-30
申请号：US838796
申请日：1986-03-12
申请人： Frank V. Bailey , Lee A. Woodward
发明人： Frank V. Bailey , Lee A. Woodward
CPC分类号： B06B1/162 , B06B1/166 , B22C15/10 , Y10T74/18344
摘要： A variably unbalanced rotating mechanism comprising a frame, a main shaft having a longitudinal axis and supported on the frame for rotation about the longitudinal axis, a drive for rotating the main shaft, first and second eccentric weights mounted for rotation coaxially with the main shaft, and a mechanism for rotating the weights in common with the main shaft and for selectively rotating the weights in opposite directions relative to each other and relative to the main shaft and independently of main shaft rotation.
摘要翻译： 一种可变不平衡的旋转机构，包括框架，主轴具有纵向轴线并被支撑在框架上用于围绕纵向轴线旋转，用于旋转主轴的驱动器，安装成与主轴同轴旋转的第一和第二偏心重块， 以及用于与主轴共同地旋转重物并且用于相对于彼此和相对于主轴相反的方向选择性地旋转重物并且独立于主轴旋转的机构。
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公开(公告)号：US4648078A
公开(公告)日：1987-03-03
申请号：US661816
申请日：1984-10-17
摘要： An array of acousto-electric transducers 1,2, e.g. a hydrophone streamer, is calibrated by disconnecting the common ground wire 17, to which all the transducer shields 14 are connected, from ground and connecting it instead to a local oscillator 18. Test signals from the oscillator are capacitively coupled into each transducer via the inherent capacitances of the insulated lead throughs 15, 16 in the transducer shields 14.
摘要翻译： 一组声电换能器1,2，例如。 通过将所有传感器屏蔽14连接到的公共接地线17与地线断开并将其连接而连接到本地振荡器18来校准水听器拖缆。来自振荡器的测试信号通过固有的电容耦合到每个换能器中 传感器屏蔽14中的绝缘引线通过15,16的电容。
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100.发明授权Apparatus for monitoring housed turbine blading to obtain blading-to-housing distance 失效用于监测容纳涡轮叶片以获得叶片到壳体距离的装置
公开(公告)号：US4644270A
公开(公告)日：1987-02-17
申请号：US709241
申请日：1985-03-06
CPC分类号： G01H1/006
摘要： A plurality of proximity sensors are disposed in a turbine flow guide to measure flow guide-to-turbine blade tip distance at various points around the flow guide. The sensor signals are detected and the peak-to-peak voltage of the detected signals provides an indication of the desired distance measurement. The signals are also monitored and if ambient operating conditions causes the signals to exceed predetermined positive or negative thresholds, corrective signals are generated so as to bring the detected signal back into an acceptable range. A proximity sensor is also provided to measure axial movement of the rotor to which the blades are attached so that the other sensor signals can be modified as a function of the measured axial position.
摘要翻译： 多个接近传感器设置在涡轮流动引导件中以在流动引导件周围的各个点处测量流动引导到涡轮叶片尖端的距离。 检测传感器信号，检测信号的峰 - 峰电压提供所需距离测量的指示。 还监控信号，如果环境工作条件导致信号超过预定的正或负阈值，则产生校正信号，以使检测到的信号回到可接受的范围内。 还提供接近传感器以测量叶片附接到的转子的轴向运动，使得可以根据测量的轴向位置来修改其它传感器信号。
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