PURPOSE: To obtain a water-level meter by which the moving average value of a water level can be computed precisely according to the actual change state of the water level by a method wherein water-level data is output only when the difference between a peak and the water level data is at a prescribed difference value or higher.
CONSTITUTION: A water-level judgment part 2 performs the sampling operation of water-level data 1 which is input every moment by means of a sampling block 3, and it detects the peak of sampled data. The difference between the peak and the sampled data is compared with a prescribed difference value. Only when the difference is at the prescribed difference value or higher, the sampled data at this time is output to a moving-average computing part 4. The computing part 4 computes the moving-average value of the sampled data which has been input between mutually adjacent peaks, and the value is output 5. Thereby, the actual change state of a water level is grasped accurately, and a precise moving-average water level which conforms to the actual state of the water level can be found.
JPH04134097 | [Title of the device] Time measuring device |
JPS5599019 | COMPARISON VALUE INDICATOR |
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