| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure a rotation angle by a certain and easy method without an error even when a detection signal level of a rotation sensor having magnetic force as a detection medium is varied by the temperature. SOLUTION: A maximum peak voltage value VAM' and a reference value VAN' of a minimum peak voltage value of first and second detection signals 400A and 400B are stored in advance. Same is performed for the second detection signal 400B. Next, a maximum peak voltage value VAM and a minimum peak voltage value VAN are obtained among respective voltage values at the time of one-period change of the first and second detection signals 400A and 400B outputted from the rotation sensor 100. Then, waveform of the first detection signal 400A is corrected to be 400A' so that the obtained input maximum peak value VAM and the input minimum peak value VAN coincide with the maximum peak reference value VAM' and the minimum peak reference value VAN' stored in a storage table 36, respectively. Same is performed for the second detection signal 400B. COPYRIGHT: (C)2006,JPO&NCIPI
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