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1. 发明授权

US5519300A Method and apparatus for analysis of polyphase electrical motor systems 失效
标题翻译：多相电动机系统分析方法和装置
公开(公告)号：US5519300A
公开(公告)日：1996-05-21
申请号：US84691
申请日：1993-06-29
申请人： Robert L. Leon , Martin J. Dowling , David Q. Heagerty
发明人： Robert L. Leon , Martin J. Dowling , David Q. Heagerty
IPC分类号： G01R31/34 , H02P6/00 , G01L3/00
CPC分类号： G01R31/343
摘要： A method for determining at least one operating parameter to determine the operating condition of a polyphase electric motor system comprises sensing the instantaneous current signal and the instantaneous voltage signal as a function of time for more than one electrical phase of the motor. The sensed current signals and the sensed voltage signals are both amplitude demodulated and phase demodulated to provide amplitude demodulated current and voltage signals as a function of time and phase demodulated current and voltage signals as a function of time. The resulting amplitude and phase demodulated signals are used to determine one or more of the following electrical parameters as a function of time: total real power, real power per phase, total reactive power, reactive power per phase, total apparent power, apparent power per phase, overall power factor, power factor per phase, electrical impedance per phase, and electrical balance.
摘要翻译：用于确定至少一个操作参数以确定多相电动机系统的操作条件的方法包括：对于电动机的多于一个电相，感测瞬时电流信号和瞬时电压信号作为时间的函数。所感测的电流信号和感测的电压信号都被幅度解调和相位解调，以提供作为时间和时间的函数的时间和相位解调的电流和电压信号的函数的幅度解调的电流和电压信号。所得到的幅度和相位解调信号用于确定作为时间的函数的以下电参数中的一个或多个：总有功功率，每相有功功率，总无功功率，每相无功功率，总视在功率，视在功率相位，总功率因数，每相功率因数，每相电阻抗和电气平衡。

2. 发明授权

US6134949A Method and apparatus for on-line detection of leaky emergency shut down or other valves 有权
公开(公告)号：US6134949A
公开(公告)日：2000-10-24
申请号：US337121
申请日：1999-06-21
申请人： Robert L. Leon , David Q. Heagerty
发明人： Robert L. Leon , David Q. Heagerty
IPC分类号： F16K5/06 , F16K37/00 , G01M3/24 , G01M3/28
CPC分类号： G01M3/2876 , F16K37/005 , F16K5/0663 , G01M3/24
摘要： A method and apparatus for on-line detection of leaky emergency shutdown or other valves in a fluid transport system having an upstream pipe, a downstream pipe and the valve connected between the upstream pipe and the downstream pipe for controlling fluid flow through the system. The valve has at least one upstream seal and at least one downstream seal and an inner cavity effectively isolated by the seals from the fluid flow stream through the system. The apparatus comprises a first transducer in fluid communication with the fluid flow stream at at least one of: a predetermined distance upstream of the upstream seal; and a predetermined distance downstream of the downstream seal. The first transducer is for sensing pressure pulsations resulting from at least one of: dynamic energy due to fluid flow through the transport system; and transient energy within the fluid in the transport system after the valve is closed and for generating representative electrical signals as a function of time. A second transducer is in fluid communication with the inner cavity of the valve for sensing substantially simultaneous pressure pulsations within the inner cavity and for generating second representative electrical signals as a function of time. An analyzer receives the first and second electrical signals and generates at least one of: a frequency response function; and a coherence function. The generated function is sufficiently averaged to provide a meaningful measure of the degree to which the two electrical signals are related to thereby indicate whether, and to what extent, sensed pressure pulsations within the fluid transport system are passed through at least one of the seals to the inner cavity.

3. 发明授权

US6128946A Method and apparatus for on-line detection of leaky emergency shut down or other valves 失效
标题翻译：在线检测泄漏应急关闭或其他阀门的方法和装置
公开(公告)号：US6128946A
公开(公告)日：2000-10-10
申请号：US96955
申请日：1998-06-12
申请人： Robert L. Leon , David Q. Heagerty
发明人： Robert L. Leon , David Q. Heagerty
IPC分类号： F16K5/06 , F16K37/00 , G01M3/24 , G01M3/28 , G01M3/00
CPC分类号： G01M3/2876 , F16K37/005 , F16K5/0663 , G01M3/24
摘要： A method and apparatus for on-line detection of leaky emergency shutdown or other valves in a fluid transport system having an upstream pipe, a downstream pipe and the valve connected between the upstream pipe and the downstream pipe for controlling fluid flow through the system. The valve has at least one upstream seal and at least one downstream seal and an inner cavity effectively isolated by the seals from the fluid flow stream through the system. The apparatus comprises a first transducer in fluid communication with the fluid flow stream at at least one of: a predetermined distance upstream of the upstream seal; and a predetermined distance downstream of the downstream seal. The first transducer is for sensing pressure pulsations resulting from at least one of: dynamic energy due to fluid flow through the transport system; and transient energy within the fluid in the transport system after the valve is closed and for generating representative electrical signals as a function of time. A second transducer is in fluid communication with the inner cavity of the valve for sensing substantially simultaneous pressure pulsations within the inner cavity and for generating second representative electrical signals as a function of time. An analyzer receives the first and second electrical signals and generates at least one of: a frequency response function; and a coherence function. The generated function is sufficiently averaged to provide a meaningful measure of the degree to which the two electrical signals are related to thereby indicate whether, and to what extent, sensed pressure pulsations within the fluid transport system are passed through at least one of the seals to the inner cavity.
摘要翻译：一种流体输送系统中泄漏紧急停机或其他阀门的在线检测方法和装置，该流体输送系统具有上游管道，下游管道和连接在上游管道和下游管道之间的阀门，用于控制通过系统的流体流动。阀具有至少一个上游密封件和至少一个下游密封件和通过密封件有效隔离通过系统的流体流动流动的内腔。所述设备包括：第一传感器，其与所述流体流动流以下列中的至少一个流体连通：所述上游密封件的上游预定距离; 和下游密封件下游的预定距离。第一传感器用于感测由以下至少一种产生的压力脉动：由流体流过传输系统的动能; 以及在阀关闭之后传输系统中的流体内的瞬态能量，并且用于产生作为时间的函数的代表性电信号。第二换能器与阀的内腔流体连通，用于感测内腔内的基本上同时的压力脉动，并产生作为时间的函数的第二代表性电信号。分析仪接收第一和第二电信号，并产生频率响应函数中的至少一个; 和一致性功能。所产生的函数被充分地平均以提供两个电信号相关程度的有意义的测量，从而指示流体输送系统内感测到的压力脉动是否以及在多大程度上通过至少一个密封件到内腔。

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