| 摘要 |
<p>Disclosed is a high-precision current detection device having a simple construction, with which the current flowing in a conductor is measured without employing a magnetic field-collecting core surrounding a current path. A first sensor unit (1) and second sensor unit (2), one of which is designated as a main sensor unit, are arranged in a state in which the magnetic flux detection directions thereof are mutually parallel, the detection centres of both sensors and the detection site of a subject conductor (20) through which the current to be measured flows are on a reference straight line, and the mutual positional relationship of the first sensor unit (1) and second sensor unit (2) is fixed. Based on a detection value index (a) that is specified based on the ratio of a value detected by the first sensor unit (1) and a value detected by the second sensor unit (2), a correction coefficient (k) for correcting change in a separation distance (h1) on the reference straight line between the subject conductor (20) and the main sensor unit is derived, and the current to be measured is calculated based on the value detected by the main sensor unit and the correction coefficient (k).</p> |
