公开(公告)号：US08248589B2

公开(公告)日：2012-08-21

申请号：US12666897

申请日：2008-07-04

Applicant: Jolyon DeFreitas ,  Roger Ian Crickmore

Inventor： Jolyon DeFreitas ,  Roger Ian Crickmore

IPC: G01N21/00

CPC classification number: G01D5/247

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100067018A1

公开(公告)日：2010-03-18

申请号：US12529291

申请日：2008-03-10

Applicant: Roger Ian Crickmore ,  Jolyon DeFreitas

Inventor： Roger Ian Crickmore ,  Jolyon DeFreitas

IPC: G01B9/02 ,  G01V1/16

CPC classification number: G01D5/35303 ,  G01D5/35383 ,  G01H9/004

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100098114A1

公开(公告)日：2010-04-22

申请号：US12593531

申请日：2008-03-28

Applicant: Jolyon DeFreitas ,  David John Hill

Inventor： Jolyon DeFreitas ,  David John Hill

IPC: H01S3/30 ,  H01S3/00 ,  B23P11/00 ,  B22D19/04

CPC classification number: H01S3/1305 ,  H01S3/067 ,  H01S3/06704 ,  H01S3/137 ,  H01S3/1398 ,  H01S5/0687 ,  Y10T29/49826

Abstract: A feedback control circuit and method for controlling laser frequency employing an interferometric phase sensor which accepts a light output from a laser and combines a phase modulated version of the light output, with an unmodulated version. By modulating only one component of the signal in the interferometric sensor, the improved noise characteristics are obtained, while demodulation can be performed relatively easily and cheaply. Methods and enclosures for reducing ambient noise in an interferometer or the delay coil thereof are also described.

Abstract translation: 一种用于控制激光频率的反馈控制电路和方法，该干涉测量相位传感器接受来自激光器的光输出并将光输出的相位调制版本与未调制版本组合。 通过仅调制干涉式传感器中的信号的一个分量，可以获得改善的噪声特性，同时可以相对容易且便宜地执行解调。 还描述了用于降低干涉仪或其延迟线圈中的环境噪声的方法和外壳。

公开(公告)号：US20110096623A1

公开(公告)日：2011-04-28

申请号：US12999115

申请日：2009-06-15

Applicant: Roger Ian Crickmore ,  Jolyon Defreitas ,  Philip John Nash

Inventor： Roger Ian Crickmore ,  Jolyon Defreitas ,  Philip John Nash

IPC: H04B17/00 ,  G01V1/38

CPC classification number: G01V1/24

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08797824B2

公开(公告)日：2014-08-05

申请号：US12999115

申请日：2009-06-15

Applicant: Roger Ian Crickmore ,  Jolyon DeFreitas ,  Philip John Nash

Inventor： Roger Ian Crickmore ,  Jolyon DeFreitas ,  Philip John Nash

IPC: G01V1/00 ,  G01V1/24

CPC classification number: G01V1/24

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20100177302A1

公开(公告)日：2010-07-15

申请号：US12666897

申请日：2008-07-04

Applicant: Jolyon DeFreitas ,  Roger Ian Crickmore

Inventor： Jolyon DeFreitas ,  Roger Ian Crickmore

IPC: G01N21/17

CPC classification number: G01D5/247

Abstract: A method of interrogating a phase based transducer by providing a pulsed input including two different wavelengths. 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.

Abstract translation: 通过提供包括两个不同波长的脉冲输入来询问基于相位的换能器的方法。 可以使用不同的波长分量来导出由合成波长所经历的相位变化，并且通过将合成波长排列成显着大于分量波长，所检测的相位具有降低的灵敏度，并且不太容易超标的效应 。

公开(公告)号：US08564786B2

公开(公告)日：2013-10-22

申请号：US12529291

申请日：2008-03-10

Applicant: Roger Ian Crickmore ,  Jolyon DeFreitas

Inventor： Roger Ian Crickmore ,  Jolyon DeFreitas

IPC: G01B9/02

CPC classification number: G01D5/35303 ,  G01D5/35383 ,  G01H9/004

Abstract: 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.

Abstract translation: 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。