| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current measuring apparatus and a current measuring method, capable of preventing a performance from degrading due to an air gap of a magnetic path, and eliminating influences of a hysteresis. <P>SOLUTION: The current measuring apparatus which is interlinked with an electric circuit being an object to be measured and measures current flowing in the object to be measured, comprises: a magnetic path forming body which is composed of a tube-like vessel, obtained by filling up the vessel with a prescribed magnetic fluid and used as a continuous magnetic path being interlinked with the object to be measured; a coil disposed at the magnetic path forming body in order to detect a magnetic field induced in the magnetic path forming body by the current flowing the object to be measured; a signal processing section which extracts a prescribed frequency component from the magnetic field detected by the coil, and amplifies the extracted frequency component; and a current computing section which computes the current flowing in the object to be measured based on a precessed result output from the signal processing section, and displays the computed result. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
