Automatic processing of ultrasonic data
    6.
    发明授权
    Automatic processing of ultrasonic data 有权
    自动处理超声波数据

    公开(公告)号:US09513372B2

    公开(公告)日:2016-12-06

    申请号:US13943791

    申请日:2013-07-17

    Abstract: An example method for automatically characterizing an echo contained in an ultrasonic signal generated with an ultrasonic transducer can include receiving data corresponding to the ultrasonic signal, calculating an energy ratio of the ultrasonic signal and localizing the echo using the energy ratio. The method can include windowing a portion of the ultrasonic signal around the localized echo and calculating a Fast Fourier Transform (FFT) and a Hilbert envelop of the windowed portion. The method can include estimating M echo parameters from the FFT and the Hilbert envelope of the windowed portion, where each of the M parameter vectors includes a plurality of echo parameters, calculating M parametric echo models based on each of the M echo parameter vectors and iteratively minimizing a difference between the windowed portion of the ultrasonic signal and a sum of the M parametric echo models.

    Abstract translation: 用于自动表征包含在用超声波换能器产生的超声信号中的回波的示例性方法可以包括接收与超声波信号相对应的数据,计算超声信号的能量比并使用能量比定位回波。 该方法可以包括在局部回波周围加窗超声波信号的一部分,并计算窗口部分的快速傅立叶变换(FFT)和希尔伯特包络。 该方法可以包括从FFT和希尔伯特包络估计M回波参数,其中M个参数矢量中的每一个包括多个回波参数,基于每个M个回波参数向量计算M个参数回波模型, 最小化超声波信号的窗口部分与M个参数回波模型的和之间的差异。

    Systems and methods for estimating time of flight for an acoustic wave

    公开(公告)号:US10401523B2

    公开(公告)日:2019-09-03

    申请号:US15325785

    申请日:2015-07-16

    Abstract: An example method for estimating a time of flight (“TOF”) for an acoustic wave generated by an acoustic source for each of a plurality of acoustic receivers in an array can include recording data corresponding to the acoustic wave received at each of the acoustic receivers, estimating a respective TOF for the acoustic wave for each of the acoustic receivers, and discarding one or more of the respective estimated TOFs. Each of the discarded TOFs can be a statistical outlier. The method can also include calculating a plurality of time delays for the acoustic wave using a plurality of non-discarded estimated TOFs, and updating the respective estimated TOFs for the acoustic wave for each of the acoustic receivers using the calculated time delays. Each of the time delays can be a difference between respective estimated TOFs for the acoustic wave for at least two of the acoustic receivers.

    Methods and apparatus to process measurements associated with drilling operations

    公开(公告)号:US10352154B2

    公开(公告)日:2019-07-16

    申请号:US13975364

    申请日:2013-08-25

    Abstract: Methods and apparatus to process measurements associated with drilling operations are described. An example method of modifying processing results during a subterranean formation drilling operation includes identifying a plurality of parameters and processing measurements associated with the subterranean formation obtained while drilling and the plurality of parameters to generate first results. Additionally, the example method includes processing measurements associated with the subterranean formation obtained while drilling is temporarily suspended and the plurality of parameters to generate second results and comparing the first and second results. Further, the example method includes, in response to the comparison of the first and second results, modifying the first results based on the second results to improve a quality of the first results.

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