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发明公开
CN109997030A 用于确定检测器单元的剩余运行时段的方法 有权

用于确定检测器单元的剩余运行时段的方法
摘要：
本发明涉及一种用于确定用在辐射测量、密度或填充水平测量仪器(2)中的具有光电倍增管(12)的检测器单元(1)的剩余运行时段(ΔtB，r)的方法。根据本发明，该方法涉及在至少一个预定的周期(dt)内记录光电倍增管的控制电压(Va)，基于在预定的周期(dt)期间记录的控制电压(Va)来确定相对于时间的变化函数(dVa/dt)，并且通过时间变化函数(dVa/dt)和在当前操作时间(tB，a)处占优的当前控制电压(Va，a)来计算直到到达最大控制电压(Va，max)之前的剩余运行时段(ΔtB，r)。根据本发明的方法提供了估计检测器单元(1)的剩余运行时段(ΔtB，r)的可能性，并因此及时地发现什么时间需要执行所需的维护措施，特别是什么时间需要执行与老化相关的更换光电倍增管(12)。
摘要（英）：

The invention relates to a method for determining a remaining operating period (DeltatB,r) of a detector unit (1) having a photomultiplier (12), for use in a radiometric density or fill level measuring instrument (2). This method involves, according to the invention, the control voltage (Va) of the photomultiplier being recorded over at least one predetermined period (dt), a change function with respect to time (dVa/dt) being ascertained on the basis of the control voltage (Va) recorded during the predetermined period (dt), and the remaining operating period (DeltatB,r) before a maximum control voltage (Va,max) is reached being computed by means of the change function with respect to time (dVa/dt) and the present control voltage (Va,a) prevailing at the present operating time (tB,a). The method according to the invention provides the possibility of approximating the remaining operating period (DeltatB,r) of the detector unit (1) and therefore finding out in good time by what time the required maintenance measures, in particular age-related replacement of the photomultiplier (12), need to be performed.

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