| 摘要 |
PROBLEM TO BE SOLVED: To improve reliability with respect to power measurement by avoiding a problem of erroneous measurement caused by a fitting error of sensors.SOLUTION: On the basis of a current value outputted by a current sensor 13 and a voltage value outputted by a voltage sensor 15, a supply power calculation section 3 calculates a value of power to be supplied from a power generator 10 to a load 12 as a supply power value. On the basis of a current value outputted by a current sensor 14 and the voltage value outputted by the voltage sensor 15, a generation power calculation section 3 calculates a value of power generated by the power generator 11 as a generation power value. A write section 6 writes the calculated supply power value and the generation power value into a storage section 8 under the mode that the values are related to time information. In the case where it is detected that a positive/negative code of the calculated supply power value is not proper, while utilizing the supply power value and the generation power value, a code control section 5 makes the positive/negative code of the supply power value into an inverse code. A correction section 7 changes (corrects) the positive/negative code of the supply power value of a code error written into the storage section 8, into the inverse code. |
