| 摘要 |
<p>In a magnetic data processing device, an input part sequentially receives magnetic data q i output from a magnetic sensor. A storage part sequentially stores the magnetic data received through the input part. An offset derivation part derives an offset according to a probabilistic method using a plurality of the magnetic data stored in the storage part as a statistical population. The offset derivation part assumes that an error Ap i contained in each of the magnetic data q i is a random variable v i following a probability distribution µ and uses an expected value corresponding to the probability distribution µ for deriving the offset. Specifically, the offset derivation part calculates an index representing variance of distances from the offset to respective ones of true magnetic data that are obtained by subtracting each ”p 1 from each magnetic data q i of the statistical population, and derives the offset which minimizes the expected value of the calculated index.</p> |
