| 摘要 |
PURPOSE:To achieve earier detection of a specific signal by determing the number of observed data whose computed values are above set level once the observed data sampling the detection outputs are memorized retroactively by a period corresponding to preset estimation signal data. CONSTITUTION:A data convertion circuit 1 converts an analog voltage into a specified signal level receiving an output Z(t) of an detector at the input thereof and derives obserbed data Zi sampling it at a fixed time interval so that they will be applied to an observed data memory circuit 2. The memory circuit 2 memorizes the observed data in the order of the sampling while an estimation signal data memory circuit 3 memorizes estimation signal data Si by one cycle. A computing circuit 4 receives and computes signals from the memory circuit 2 and 3 each time the sampling is done and the results are stored into a data meory circuit 5. The data of the memory circuit 5 are each compared with the set level V from a level setting device 7 by means of a comparator circuit 6. The number of the data is counted as larger than the set level and when the count exceeds a fixed value, a discrimination output is provided to indicate the presence of a specific signal. |
