公开(公告)号：US20130013260A1

公开(公告)日：2013-01-10

申请号：US13177769

申请日：2011-07-07

申请人： Kwong Wing Au ,  Brian C. Krafthefer ,  Eric Eastwold

发明人： Kwong Wing Au ,  Brian C. Krafthefer ,  Eric Eastwold

IPC分类号： G06F15/00

CPC分类号： G01T1/15

摘要： A system includes a count detector, a communication medium; and a processor coupled to the count detector. The processor continuously receives a plurality of pulses from the count detector. A pulse indicates a detection of a radiation unit emitted from a source material or a background. The processor determines a first period of time based on an expected range of speed of a carrier of the source material, and integrates the plurality of pulses over the first period of time, thereby yielding an integrated count associated with a time at a midpoint of the first period of time. The processor creates a continuous time series of count profiles from a plurality of integrated counts that are computed using a plurality of windows within the first period of time, and shifts each window over a second period of time. The second period of time is shorter than the first period of time. The processor estimates a background count from a history of the count profiles, computes an adaptive threshold based on the estimated background count, and detects the source material when consecutives of the integrated counts exceed the adaptive threshold.

摘要翻译： 系统包括计数检测器，通信介质; 以及耦合到计数检测器的处理器。 处理器从计数检测器连续接收多个脉冲。 脉冲表示从源材料或背景发射的辐射单元的检测。 处理器基于源材料的载波的预期速度范围来确定第一时间段，并且在第一时间段内对多个脉冲进行积分，由此产生与在中间点处的时间相关联的积分计数 第一段时间。 处理器从在第一时间段内使用多个窗口计算的多个积分计数器创建连续的时间序列计数轮廓，并且在第二时间段内移动每个窗口。 第二个时间段比第一个时间段短。 处理器根据计数曲线的历史估计背景计数，基于估计的背景计数来计算自适应阈值，并且当积分计数的连续执行超过自适应阈值时检测源材料。

公开(公告)号：US08700359B2

公开(公告)日：2014-04-15

申请号：US13177769

申请日：2011-07-07

申请人： Kwong Wing Au ,  Brian C. Krafthefer ,  Eric Eastwold

发明人： Kwong Wing Au ,  Brian C. Krafthefer ,  Eric Eastwold

IPC分类号： G06F15/00

CPC分类号： G01T1/15

摘要： A system includes a count detector, a communication medium; and a processor coupled to the count detector. The processor continuously receives a plurality of pulses from the count detector. A pulse indicates a detection of a radiation unit emitted from a source material or a background. The processor determines a first period of time based on an expected range of speed of a carrier of the source material, and integrates the plurality of pulses over the first period of time, thereby yielding an integrated count associated with a time at a midpoint of the first period of time. The processor creates a continuous time series of count profiles from a plurality of integrated counts that are computed using a plurality of windows within the first period of time, and shifts each window over a second period of time. The second period of time is shorter than the first period of time. The processor estimates a background count from a history of the count profiles, computes an adaptive threshold based on the estimated background count, and detects the source material when consecutives of the integrated counts exceed the adaptive threshold.

摘要翻译： 系统包括计数检测器，通信介质; 以及耦合到计数检测器的处理器。 处理器从计数检测器连续接收多个脉冲。 脉冲表示从源材料或背景发射的辐射单元的检测。 处理器基于源材料的载波的预期速度范围来确定第一时间段，并且在第一时间段内对多个脉冲进行积分，由此产生与在中间点处的时间相关联的积分计数 第一段时间。 处理器从在第一时间段内使用多个窗口计算的多个积分计数器创建连续的时间序列计数轮廓，并且在第二时间段内移动每个窗口。 第二个时间段比第一个时间段短。 处理器根据计数曲线的历史估计背景计数，基于估计的背景计数来计算自适应阈值，并且当积分计数的连续执行超过自适应阈值时检测源材料。