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公开(公告)号：US07345953B2
公开(公告)日：2008-03-18
申请号：US10533761
申请日：2003-11-04
IPC分类号： G01V1/18
摘要： A vibration sensing device, package and system and a method of manufacturing a vibration sensing device are disclosed. The vibration sensing device comprises a body whose geometry is such that it exhibits flextensional properties.
摘要翻译： 公开了一种振动感测装置，封装和系统以及制造振动感测装置的方法。 振动检测装置包括其几何形状使其具有挠曲特性的主体。
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公开(公告)号：US09243949B2
公开(公告)日：2016-01-26
申请号：US13979262
申请日：2012-01-16
摘要： This application describes methods and apparatus for fiber optic distributed acoustic sensing (DAS) where microstructured fiber (202), such as holey fiber or photonic crystal fiber is used as the sensing fiber (104). The microstructured fiber is configured so to provide at least one of enhanced sensitivity to a given incident acoustic signal; an enhanced non-linear optical power threshold and directional sensitivity. By configuring the microstructured fiber to be more compliant than an equivalent solid fiber and/or provide a large refractive index variation in response to applied strain, the response to a given acoustic stimulus may be larger than for the equivalent fiber, Providing a hollow core may allow higher optical powers and by providing a directionality to microstructured (304) allows the fiber to be used in a DAS system with a directional response.
摘要翻译： 本申请描述了用于光纤分布式声学感测（DAS）的方法和装置，其中使用诸如多孔光纤或光子晶体光纤的微结构纤维（202）作为感测光纤（104）。 微结构纤维被配置为提供对给定入射声信号的增强灵敏度中的至少一个; 增强的非线性光功率阈值和方向灵敏度。 通过将微结构纤维配置为比等效的固体纤维更柔顺，和/或响应于应变应变提供大的折射率变化，对给定声学刺激的响应可能大于等效纤维的响应。提供中空芯可以 允许更高的光功率并且通过向微结构化提供方向性（304）允许光纤在具有定向响应的DAS系统中使用。
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公开(公告)号：US20130291642A1
公开(公告)日：2013-11-07
申请号：US13979262
申请日：2012-01-16
IPC分类号： G01H9/00
摘要： This application describes methods and apparatus for fibre optic distributed acoustic sensing (DAS) where microstructured fibre (202), such as holey fibre or photonic crystal fibre is used as the sensing fibre (104). The microstructured fibre is configured so to provide at least one of enhanced sensitivity to a given incident acoustic signal; an enhanced non-linear optical power threshold and directional sensitivity. By configuring the microstructured fibre to be more compliant than an equivalent solid fibre and/or provide a large refractive index variation in response to applied strain, the response to a given acoustic stimulus may be larger than for the equivalent fibre, Providing a hollow core may allow higher optical powers and by providing a directionality to microstructured (304) allows the fibre to be used in a DAS system with a directional response.
摘要翻译： 本申请描述了用于光纤分布式声学感测（DAS）的方法和装置，其中使用诸如多孔光纤或光子晶体光纤的微结构纤维（202）作为感测光纤（104）。 微结构纤维被配置为提供对给定入射声信号的增强灵敏度中的至少一个; 增强的非线性光功率阈值和方向灵敏度。 通过将微结构纤维配置为比等效的固体纤维更柔顺，和/或响应于应变应变提供大的折射率变化，对给定声学刺激的响应可能大于等效纤维的响应。提供中空芯可以 允许更高的光功率并且通过向微结构化提供方向性（304）允许光纤在具有定向响应的DAS系统中使用。
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公开(公告)号：US20110096623A1
公开(公告)日：2011-04-28
申请号：US12999115
申请日：2009-06-15
CPC分类号： G01V1/24
摘要： A method of sensing using a phase based transducer in which a transducer response is provided at multiple different levels of sensitivity. The different levels of sensitivity are used to produce an output which does not overscale across a wide range of signal levels. This is particularly useful for use in conjunction with multiplexed arrays of fibre optic sensors for seismic surveying. Methods of sensor calibration and noise reduction are also described.
摘要翻译： 一种使用基于相位的传感器进行感测的方法，其中在多个不同灵敏度级别提供换能器响应。 使用不同的灵敏度水平来产生在宽范围的信号电平上不超标的输出。 这对于与用于地震测量的光纤传感器的复用阵列结合使用特别有用。 还描述了传感器校准和降噪的方法。
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公开(公告)号：US08248589B2
公开(公告)日：2012-08-21
申请号：US12666897
申请日：2008-07-04
IPC分类号： G01N21/00
CPC分类号： G01D5/247
摘要： A method of interrogating a phase based transducer by providing a pulsed input including two different wavelengths in which the different wavelength components can be used to derive a phase change experienced by a synthetic wavelength, and by arranging for the synthetic wavelength to be significantly greater that the component wavelengths, the phase so detected has a reduced sensitivity, and is less susceptible to overscaling effects.
摘要翻译： 一种通过提供包括两种不同波长的脉冲输入来询问基于相位的换能器的方法，其中不同波长分量可用于导出由合成波长所经历的相位变化，并且通过将合成波长设置为明显大于 分量波长，所以如此检测的相位具有降低的灵敏度，并且不太容易发生超标效应。
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公开(公告)号：US20100067018A1
公开(公告)日：2010-03-18
申请号：US12529291
申请日：2008-03-10
CPC分类号： G01D5/35303 , G01D5/35383 , G01H9/004
摘要： Interrogation of a phase based transducer is performed by comparing the state of the transducer at two points in time to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement can therefore be thought of as a low sensitivity measurement to be used instead of or in combination with the normal signal measurement having higher sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively. For a signal with the majority of its energy centred at approximately 800 Hz, for example, the derivative of that signal will typically be attenuated by 60 dB with a period between the two measurement times of 200 ns.
摘要翻译： 基于相位的换能器的询问是通过比较两个时间点上的换能器的状态来确定被测量的随时间变化的速率作为相位变化来执行的。 变化率或相位变化的导数通常具有比信号本身小得多的幅度，因此，导数测量可以被认为是低灵敏度测量，以代替或与正常信号测量结合使用，具有 灵敏度更高。 以这种方式，可以更有效地测量否则可能会产生超大效应的大振幅信号。 对于其大部分能量集中在大约800Hz的信号，例如，该信号的导数通常将在200ns的两个测量时间之间的周期内衰减60dB。
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公开(公告)号：US08564786B2
公开(公告)日：2013-10-22
申请号：US12529291
申请日：2008-03-10
IPC分类号： G01B9/02
CPC分类号： G01D5/35303 , G01D5/35383 , G01H9/004
摘要： Interrogation of a phase based transducer is performed by comparing the state of the transducer at two points in time to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement can therefore be thought of as a low sensitivity measurement to be used instead of or in combination with the normal signal measurement having higher sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively. For a signal with the majority of its energy centered at approximately 800 Hz, for example, the derivative of that signal will typically be attenuated by 60 dB with a period between the two measurement times of 200 ns.
摘要翻译： 基于相位的换能器的询问是通过比较两个时间点上的换能器的状态来确定被测量的随时间变化的速率作为相位变化来执行的。 变化率或相位变化的导数通常具有比信号本身小得多的幅度，因此，导数测量可以被认为是低灵敏度测量，以代替或与正常信号测量结合使用，具有 灵敏度更高。 以这种方式，可以更有效地测量否则可能会产生超大效应的大振幅信号。 对于其大部分能量集中在大约800Hz的信号，例如，该信号的导数通常将在200ns的两个测量时间之间的周期内衰减60dB。
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公开(公告)号：US08994953B2
公开(公告)日：2015-03-31
申请号：US13060546
申请日：2009-08-20
申请人： Roger Ian Crickmore
发明人： Roger Ian Crickmore
CPC分类号： G01D5/35303 , G01V1/16
摘要： Interrogation of a phase based transducer is performed by temporally overlapping and interfering a single pulse output from the transducer to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement therefore has reduced sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively.
摘要翻译： 基于相位的换能器的询问是通过暂时重叠和干扰来自换能器的单个脉冲输出进行的，以确定被测量的随时间变化的速率被表示为相位变化。 变化率或相位变化的导数通常具有比信号本身小得多的幅度，因此导数测量具有降低的灵敏度。 以这种方式，可以更有效地测量否则可能会产生超大效应的大振幅信号。
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公开(公告)号：US08797824B2
公开(公告)日：2014-08-05
申请号：US12999115
申请日：2009-06-15
CPC分类号： G01V1/24
摘要： A method of sensing using a phase based transducer in which a transducer response is provided at multiple different levels of sensitivity. The different levels of sensitivity are used to produce an output which does not overscale across a wide range of signal levels. This is particularly useful for use in conjunction with multiplexed arrays of fiber optic sensors for seismic surveying. Methods of sensor calibration and noise reduction are also described.
摘要翻译： 一种使用基于相位的传感器进行感测的方法，其中在多个不同灵敏度级别提供换能器响应。 使用不同的灵敏度水平来产生在宽范围的信号电平上不超标的输出。 这对于与用于地震测量的光纤传感器的复用阵列结合使用特别有用。 还描述了传感器校准和降噪的方法。
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公开(公告)号：US20110149295A1
公开(公告)日：2011-06-23
申请号：US13060546
申请日：2009-08-20
申请人： Roger Ian Crickmore
发明人： Roger Ian Crickmore
CPC分类号： G01D5/35303 , G01V1/16
摘要： Interrogation of a phase based transducer is performed by temporally overlapping and interfering a single pulse output from the transducer to determine the rate of change with time of the measurand represented as a phase change. The rate of change, or derivative of the phase change typically has a much smaller amplitude than the signal itself, and the derivative measurement therefore has reduced sensitivity. In this way, large amplitude signals which might otherwise be subject to overscaling effects can be measured more effectively.
摘要翻译： 基于相位的换能器的询问是通过暂时重叠和干扰来自换能器的单个脉冲输出进行的，以确定被测量的随时间变化的速率被表示为相位变化。 变化率或相位变化的导数通常具有比信号本身小得多的幅度，因此导数测量具有降低的灵敏度。 以这种方式，可以更有效地测量否则可能会产生超大效应的大振幅信号。
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