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2. 发明授权

US4605859A Radiation measuring apparatus 失效
标题翻译：辐射测量仪
公开(公告)号：US4605859A
公开(公告)日：1986-08-12
申请号：US562985
申请日：1983-12-19
申请人： Elmo J. DiIanni , Harold J. Cooley , Michio Fujita , Charles V. Noback
发明人： Elmo J. DiIanni , Harold J. Cooley , Michio Fujita , Charles V. Noback
IPC分类号： G01T1/17 , G01T1/18 , G01T1/185
CPC分类号： G01T1/171 , G01T1/18
摘要： This invention describes apparatus for and a method of measuring radiation field strength which uses a pulse enabled detector (e.g. G-M tube) and is based on the equation R=K/t, where R is the radiation field strength, t is the time till first strike, and K is a proportionality constant for the given apparatus. The G-M detector is enabled by pulsing the bias voltage across the detector up into its active region and then measuring the elapsed time interval to the incident of first strike. Since the reciprocal of this time is proportional to the radiation field strength, all information necessary to determine the field strength has been obtained. A constant wait time is employed after each strike to assure that the G-M tube full recovery time has expired, and the G-M tube is then enabled and the process repeated. Because of the random nature of radiation phenomena the confidence level that any given measurement is an accurate representation of the true average field strength is low. Many measurements are taken and averaged for high confidence factors. For low fields, the lost time due to the deliberate "wait after strike" is a small percentage of the total time, so is of little consequence. In high fields, the "time to strike" is short, so many measurements can be made, again rendering the lost time of little significance.
摘要翻译：本发明描述了使用脉冲启用检测器（例如GM管）测量辐射场强度的装置和方法，并且基于等式R = K / t，其中R是辐射场强度，t是直到第一冲击，K是给定装置的比例常数。通过将检测器上的偏置电压脉冲到其有效区域，然后测量第一次触发事件的经过时间间隔，启用G-M检测器。由于这个时间的倒数与辐射场强度成比例，所以获得了确定场强所需的所有信息。在每次冲击之后采用恒定的等待时间，以确保G-M管全部恢复时间已经过期，然后启用G-M管，并重复该过程。由于辐射现象的随机性质，任何给定测量是真实平均场强的精确表示的置信水平较低。对于高置信因子，进行许多测量并进行平均。对于低地，由于故意的“等待罢工”造成的损失时间是总时间的一小部分，所以没有什么后果。在高领域，“罢工时间”很短，所以可以进行许多测量，再次使失去的时间没有什么意义。

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