| 摘要 |
PROBLEM TO BE SOLVED: To attain flow rate integration processing in a low frequency clock CPU driven by a battery with low power consumption and high precision without operating any miss count even when the frequencies of a flow rate signal are made high. SOLUTION: Flow rate signal pulses in a number proportional to a fluid flow rate from a flow rate signal outputting means 2 are counted by a counter 11, and when a residual number C of pulses in the counter in each constant period is a prescribed number n or more, flow rate values for the n input pulses are integrated as an integrated value, and the n pulses are subtracted from the counter 11. When the residual number 9 of pulses is 1-less than the prescribed number n, a flow rate value for one input pulse is integrated as an integrated value, and one pulse is subtracted from the counter. |
