公开(公告)号：US4825077A

公开(公告)日：1989-04-25

申请号：US121099

申请日：1987-11-16

申请人： Riad A. Tawil ,  David H. Sicking

发明人： Riad A. Tawil ,  David H. Sicking

IPC分类号： G01T1/15 ,  G01T1/208 ,  G01N23/06

CPC分类号： G01T1/208 ,  G01T1/15

摘要： A system and related method for sensing a parameter of a medium by means of radiation attenuation, the system including a radiation source for emitting radiation that will be attenuated as a function of the parameter upon passage through the medium and a radiation detector operatively positioned to detect the radiation that will be attenuated as aforesaid, and the system being further characterized by the detector comprising a scintillator probe for producing an electrical current output proportionally representative of detected radiation, a current integrator for continuously integrating the electrical current output of the scintillator probe, the current integrator having an input for receiving the electrical current output of the scintillator probe and an output for producing an electrical output representative of the integral of curernt received at the input thereof, a charge injector for supplying to the input of the current integrator current pulses of predetermined total charge and of opposite polarity relative to the electrical current output of the scintillator probe in response to the output of the current integrator having a predetermined characteristic, and a detector output for generating count signals at a frequency proportionally representative of the frequency at which the current pulses are supplied to the input of the current integrator by the charge injector.

摘要翻译： 一种用于通过辐射衰减来感测介质的参数的系统和相关方法，所述系统包括用于发射辐射的辐射源，所述辐射源将在通过介质时作为参数衰减的功能;以及辐射探测器，其被可操作地定位以检测 将如上所述将被衰减的辐射，并且该系统的特征还在于检测器包括用于产生与检测到的辐射成比例地代表的电流输出的闪烁体探针，用于连续积分闪烁体探针的电流输出的电流积分器， 具有用于接收闪烁体探针的电流输出的输入的电流积分器和用于产生代表在其输入处接收的固化的积分的电输出的输出;电荷注入器，用于向电流积分器的输入提供电流脉冲 预定总费用 并且响应于具有预定特性的电流积分器的输出，相对于闪烁体探针的电流输出具有相反极性的检测器输出;以及检测器输出，用于以比例地代表电流脉冲的频率的频率产生计数信号 通过电荷注入器提供给当前积分器的输入。