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公开(公告)号：EP0100501A3
公开(公告)日：1985-08-28
申请号：EP83107244
申请日：1983-07-23
发明人： Fukada, Tetsuji , Ise, Yukihiko
CPC分类号： G01H13/00 , G01H11/08 , H01L41/1132
摘要： A vibration sensor (K) including a piezoelectric vibrator (3) constituted by a pair of plate-like piezoelectric elements (1,2) bonded to each other with the polarization axis aligned in the direction of the thickness. The vibration sensor (K) further includes a vibrator (5) of a bending vibration mode, which is subject to resonance at a predetermined frequency and is locally provided in the piezoelectric vibrator (3) such that a portion of the piezoelectric vibrator (3), disposed peripherally of the vibrator (5) of the bending vibration mode, is fixedly supported.
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公开(公告)号：EP0088627A3
公开(公告)日：1985-12-04
申请号：EP83301233
申请日：1983-03-08
IPC分类号： G01H01/00
CPC分类号： G01H1/003
摘要： Portable vibration monitoring apparatus analyses into different frequency bands electrical signals generated by a transducer from the vibrations at selected points on a machine. The magnitudes of the signals in the different bands are compared with stored values expected for the particular point and an indication is displayed if the magnitude is too high as a possible precursor to machine breakdown. The results of the comparisons are stored in the apparatus. The apparatus has a microprocessor for performing the selection of stored values, the comparisons and the storage of the results. A keyboard is provided to enter the identity of the point under test and to cause the apparatus to display more details of the results of the comparisons. As part of a system a second, fixed, apparatus may be provided which can be connected to the portable apparatus to enter the stored values and to read from it the results of the comparisons. The fixed apparatus may have a printer. The portable apparatus may have a low power mode in which the stored results are saved.
摘要翻译： 便携式振动监测装置根据机器上选定点处的振动，将换能器产生的电信号分析成不同的频带。 将不同频带中的信号的幅度与预期的特定点的存储值进行比较，并且如果幅度太高，则显示指示作为机器故障的可能前兆。 比较结果存储在设备中。 该装置具有用于执行存储值的选择，结果的比较和存储的微处理器。 提供键盘以输入被测点的身份，并使设备显示比较结果的更多细节。 作为系统的一部分，可以提供第二固定的设备，其可以连接到便携式设备以输入存储的值并从中读取比较结果。 固定设备可以具有打印机。 便携式设备可以具有其中保存存储的结果的低功率模式。
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3.发明公开
公开(公告)号：EP0107178A3
公开(公告)日：1984-12-19
申请号：EP83110442
申请日：1983-10-19
发明人： Söhoel, Eivind O.
CPC分类号： F16N29/00 , G01M13/045
摘要： A method and system for determining the lubricational condition of an operating rolling element bearing utilizing a shock pulse measuring technique. A schedule of occurring shock pulses and lubricant film parameters for a running rolling element control bearing is established. The magnitude of occurring shocks within the operating bearing is determined and the lubricational condition of the operating bearing determined with reference to the established schedule. A programed shock pulse measuring instrument provides direct output of information relative to the lubricational condition of an operating bearing.
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公开(公告)号：EP0076168A3
公开(公告)日：1984-05-02
申请号：EP82305181
申请日：1982-09-30
申请人： FUJITSU LIMITED
IPC分类号： G01H01/00
CPC分类号： G01S7/52049 , G01H1/00 , G01S7/52036 , G01S15/895
摘要： A measuring system which characterizes an inhomogeneous medium such as living body tissue by transmitting an ultrasonic wave including a plurality of different frequency components into a measuring medium and analyzing a reflected wave received from the medium. Generally ultrasonic waves of different frequencies have respective different frequency dependent acoustic field profiles. Frequency characteristics of the measuring system itself are obtained in advance by measuring reflected waves from a reference reflector placed in a reference medium which is homogeneous or weakly inhomogeneous and has an almost or substantially frequency independent attenuation. Compensation data obtained by such measurement is stored in a memory and when in use for actual measurement of a measuring medium, the data is read out and used to eliminate adverse influences on received waves arising from such differences in acoustic field profiles.
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公开(公告)号：EP0179618A3
公开(公告)日：1988-01-07
申请号：EP85307491
申请日：1985-10-17
IPC分类号： G01H01/00
CPC分类号： G01H1/006
摘要： Sensors are disposed equally about a blade row in a turbine with each sensor providing an output signal responsive to a passing blade. A blade is selected for monitoring purposes by location relative to a reference position ± some angular distance constituting a small window. As the selected blade passes a sensor, its output signal provides a pulse, and is gated. The sequential pulses of the sensors form a pulse train. An FM detector is provided to derive vibration information.
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公开(公告)号：EP0108534A3
公开(公告)日：1985-12-11
申请号：EP83306377
申请日：1983-10-20
申请人： HALLIBURTON COMPANY
摘要： 5 The passage of materials in a well casing is detected and monitored acoustically. This is especially useful for detecting the passage of cement plugs. An acoustic indicator system for use in the method comprises a microphone (10) to be placed in the well, a recording means (50) connected to the microphone, and headphones (90).
摘要翻译： 检测和监测井套管中材料的通道。 这对于检测水泥塞的通道特别有用。 用于该方法的声学指示器系统包括放置在井中的麦克风（10），连接到麦克风的记录装置（50）和耳机（90）。
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公开(公告)号：EP0105600A3
公开(公告)日：1984-05-30
申请号：EP83305010
申请日：1983-08-31
发明人： Ray, David James
IPC分类号： G01H01/00
CPC分类号： G01H1/00
摘要： A transducer selecting system for use in a noisy environment can operate in a vibration monitoring system using a data processor. Narrow band signals representing transducer information at selected frequencies of interest are subtracted by subtractors (60,60') from broad band signals representing information and background noise. The magnitude of the background noise components of each transducer is used by a comparator (64) to select from among duplicative transducers or to signal potentially unreliable information.
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公开(公告)号：EP0085570A3
公开(公告)日：1984-05-30
申请号：EP83300499
申请日：1983-02-01
发明人： Kapadia, Nikul S. , Ray, David J.
IPC分类号： G01H01/00
摘要： A vibration monitoring sytem for aircraft engines includes a nonrecursive digital filter network (22) controlled by a data processor (16). A signal from accelerometers (1,2) are passed through a circuit (36) for sampling analogue signals under the control of sampling signals. Digital techniques process tachometer signals to generatate sampling signals at a frequency which is an integral multiple of the rotating frequency. The digital filter (22) can track the rotational frequency of the rotating component and can be accurately centred on that frequency. The digital filter includes a pair of memories (82, 88) which respectively store sampled data and constant coefficients. The sampled data storage can accommodate the output of more than one sensor and data from each sensor can be alternately processed.
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公开(公告)号：EP0246637A3
公开(公告)日：1988-07-20
申请号：EP87107353
申请日：1987-05-20
IPC分类号： G01H01/00
CPC分类号： G01H1/003
摘要： A method for monitoring vibrations in rotating machinery comprising acquiring vibration signals from a rotating part while it operates respectively within and below its normal intended operating speed range, digitizing the signals, transforming the signals into the frequency domain, normalizing the signal with respect to part rpm and subtracting the runout data from the normal operating data to easily achieve a comprehensive reading of the rotating part condition.
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10.发明公开Rotating machine diagnosis method and apparatus with acoustic emission technique 无效旋转机诊断方法和声发射技术的设备
公开(公告)号：EP0209862A3
公开(公告)日：1987-10-14
申请号：EP86109882
申请日：1986-07-18
申请人： HITACHI, LTD.
发明人： Sato, Ichiya , Yoneyama, Takao
CPC分类号： G01N29/4454 , G01H1/003 , G01N29/14 , G01N2291/2693
摘要： Disclosed is a rotating machine diagnosis method and apparatus with an acoustic emission (AE) technique, which comprises: an AE sensor (2) mounted on a rotating machine (1) for sensing an acoustic signal of the rotating machine (1); envelope detector means (4, 131) for obtaining an envelope signal from the acoustic signal from the AE sensor (2); waveform-feature processor means (132) for performing signal processing so as to detect a feature of waveform of an output waveform signal from the envelope detector means; feature decision means (14) for judging whether the feature of waveform belongs to a continuous type or a burst type and/or a rotation-synchronous type or a rotation-asynchronous type on the basis of an output signal from the waveform-feature processor means; and diagnostic output means (15) for outputting and displaying an output signal from the feature decision means, whereby it is possible to perform judgement simultaneously as to a plurality of kinds of abnormality.
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