Device and method for material characterization

    公开(公告)号:US10545257B2

    公开(公告)日:2020-01-28

    申请号:US16518881

    申请日:2019-07-22

    Abstract: A device and method for material characterization are provided. In one aspect, the method includes detecting packets of radiation emanating from within or passing through one or more items of freight or baggage as a result of irradiation by incident radiation, using a plurality of detectors, each of the detectors being configured to produce an electrical pulse caused by the detected packets having a characteristic size or shape dependent on an energy of the packets. The method further includes processing each of the electrical pulses using one or more digital processors to determine the characteristic size or shape, generating a screening detector energy spectrum for each of the detectors of the energies of the packets detected, and measuring an effective atomic number Z of an unknown material associated with the one or more items of freight or baggage based on the screening detector energy spectra in comparison with calibration measurements.

    Input count rate estimation in radiation pulse detectors

    公开(公告)号:US11199638B2

    公开(公告)日:2021-12-14

    申请号:US17049921

    申请日:2019-04-25

    Abstract: The invention provides a method of estimating an input count rate of a radiation pulse detector from a detector signal where some individual signal pulses making up the detector signal are closely spaced in time less than a minimum reliable detection gap. In one aspect, the individual signal pulses are detected using a detection algorithm and a plurality of interval start times are defined each interposed with at least one of the detected individual signal pulse arrival times, each interval start time being later by at least the minimum reliable detection gap than a corresponding most recent detected individual signal pulse arrival time. A corresponding plurality of individual signal pulse arrival intervals are calculated between each of the interval start times and a corresponding next detected individual signal pulse arrival time.

    INPUT COUNT RATE ESTIMATION IN RADIATION PULSE DETECTORS

    公开(公告)号:US20210239866A1

    公开(公告)日:2021-08-05

    申请号:US17049921

    申请日:2019-04-25

    Abstract: The invention provides a method of estimating an input count rate of a radiation pulse detector from a detector signal where some individual signal pulses making up the detector signal are closely spaced in time less than a minimum reliable detection gap (104,105; tc, td). In one aspect, the individual signal pulses are detected using a detection algorithm and a plurality of interval start times (sk) are defined each interposed with at least one of the detected individual signal pulse arrival times (tk), each interval start time (sk) being later by at least the minimum reliable detection gap than a corresponding most recent detected individual signal pulse arrival time (tk−1). A corresponding plurality of individual signal pulse arrival intervals are calculated between each of the interval start times (sk) and a corresponding next detected individual signal pulse arrival time (tk).

    METHOD AND APPARATUS FOR RESOLVING SIGNALS IN DATA
    5.
    发明申请
    METHOD AND APPARATUS FOR RESOLVING SIGNALS IN DATA 审中-公开
    用于解决数据中信号的方法和装置

    公开(公告)号:US20160313459A1

    公开(公告)日:2016-10-27

    申请号:US15102852

    申请日:2014-12-11

    Abstract: A method and apparatus for resolving individual signals in detector output data are disclosed. One inventive aspect includes a processing circuit configured to receive detector output data wherein the detector output data may be stepped data or non-stepped data; transform the detector output data to produce stepped data wherein the detector output data is received as non-stepped data; detect at least one signal at least partially based on the stepped data; and estimate a parameter associated with the signal, wherein estimating the parameter may preferably comprise estimating a signal energy or signal time of arrival associated with the signal.

    Abstract translation: 公开了一种用于解决检测器输出数据中的各个信号的方法和装置。 一个创造性方面包括处理电路,其被配置为接收检测器输出数据,其中检测器输出数据可以是步进数据或非步数据; 变换检测器输出数据以产生阶梯数据,其中检测器输出数据作为非步数据被接收; 至少部分地基于所述阶梯式数据来检测至少一个信号; 并且估计与该信号相关联的参数,其中估计参数可以优选地包括估计与该信号相关联的信号能量或信号到达时间。

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