| 摘要 |
PURPOSE:To eliminate fluctuation of measured values, by comparing an output of a short-term integration averaging circuit and that of long-term integrating averaging circuit with a comparator and when the difference value turns out to be the preset specified value and up, by controlling with alteration into the integration average value of the short-term integration averaging circuit at this moment of the integration average value of the long-term integration averaging circuit. CONSTITUTION:Input of a series of pulses from the input terminal 14a causes counting of number of pulse signal by a short-term integration averaging circuit 2 and an integrated value for a econd is issued out to be introduced into a long-term integration averaging circuit 6. And, the circuit 16 has already averaged furhter the output from the circuit 12 with an integrating circuit and its time constant is 30sec. Consequently, fluctuation of the input plse signals is eliminated at the circuit 16 by long-time averaging and a stable counting ratio is issued out. Further, the output of the circuit 16 is introduced to a comparator 18 also for comparing output from the circuit 16 and that from the circuit 12 and when the difference is preset specifierd value and up, the integrated average value of the circuit 16 is controlled by alteration to the integration average value of then circuit 12. Thus, the fluctuation of the measured values is eliminated.
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