公开(公告)号：US4835703A

公开(公告)日：1989-05-30

申请号：US18898

申请日：1987-02-25

申请人： Jane P. Arnold ,  James A. Neuner

发明人： Jane P. Arnold ,  James A. Neuner

IPC分类号： G01R23/15 ,  G01R29/033 ,  G01T1/17

CPC分类号： G01R29/033 ,  G01R23/15 ,  G01T1/17

摘要： A method of counting a plurality of pulses representative of randomly occurring events includes the steps of counting the number of pulses, having an amplitude exceeding a first threshold amplitude, which occur during a predetermined sampling period to obtain a first count and counting the number of pulses, having an amplitude exceeding a second threshold amplitude, which occur during the sampling period to obtain a second count. The second count is compared to a predetermined number and the counts for that sampling period are rejected if the second count is too large. If the second count is not too large, the true count is calculated by subtracting the second count from the first count. This counting procedure is repeated for a preselected number of successive sampling periods. After the final sampling period, all of the true counts are added to obtain an accumulated count and the accumulated count is multiplied by a scaling factor to obtain an output count. This output count is further multiplied by a compensating factor to account for dead time in the detector which receives the incoming data.

摘要翻译： 计算表示随机发生事件的多个脉冲的方法包括以下步骤：计数在预定采样周期内发生的振幅超过第一阈值振幅的脉冲数，以获得第一计数并对脉冲数进行计数 具有超过第二阈值振幅的振幅，其在采样周期期间发生以获得第二计数。 将第二计数与预定数量进行比较，并且如果第二计数太大，则该采样周期的计数被拒绝。 如果第二计数不太大，则通过从第一计数中减去第二计数来计算真实计数。 对于预选数量的连续采样周期重复该计数过程。 在最终采样周期之后，添加所有真实计数以获得累计计数，并将累积计数乘以比例因子以获得输出计数。 该输出计数进一步乘以补偿因子以考虑接收输入数据的检测器中的死区时间。

公开(公告)号：US4837705A

公开(公告)日：1989-06-06

申请号：US18899

申请日：1987-02-25

申请人： James M. Mussler ,  Jane P. Arnold

发明人： James M. Mussler ,  Jane P. Arnold

IPC分类号： G01R23/10 ,  G01R23/15

CPC分类号： G01R23/15 ,  G01R23/10

摘要： A method of determining the rate of change of frequency of a plurality of randomly occurring events begins by counting the number of random events which occur within a plurality of predetermined sampling intervals to obtain a plurality of count values, each corresponding to one of the sampling intervals. These count values are stored in a memory table and the count values which correspond to the most recent set of N of the sampling intervals is summed to obtain a first accumulated count. A second accumulated count is obtained by summing the count values which correspond to a second set of N of the sampling intervals, preceding the most recent set. The rate of change of event frequency is then calculated by dividing the logarithm of (S.sub.1 /S.sub.2) by the number N. The value of the number N is dynamically adjusted for subsequent calculations based on the incoming frequency of random events.

摘要翻译： 确定多个随机发生事件的频率变化率的方法开始于在多个预定采样间隔内发生的随机事件的数量，以获得多个计数值，每个计数值对应于采样间隔 。 这些计数值被存储在存储器表中，并且对应于最近采样间隔的N个集合的计数值被相加以获得第一累积计数。 通过将对应于最近设置的采样间隔的第二组N的计数值相加来获得第二累加计数。 然后通过将（S1 / S2）的对数除以数字N来计算事件频率的变化率。根据随机事件的输入频率对数N的值进行动态调整，用于后续计算。