| 摘要 |
<p>An electromagnetic flowmeter includes a cylindrical flow path (P), an even number of magnetic poles (Yp1 - Yp4; Yp1 - Yp8) disposed on the periphery of the cylindrical flow path by equally dividing the circumference thereof, a plurality of cores (K₁ - K₄; K₁ - K₈) having one ends respectively being in contact with the even number of magnetic poles and extending outwardly radially with respect to the cylindrical flow path, a plurality of coils (C₁ - C₄; C₁ - C₈) respectively wound about the cores for exciting the cores so that respective adjacent cores exhibit opposite polarities to each other, an outer yoke (Yo) having a ring shape for connecting the other ends of the cores to form a magnetic circuit, and a plurality of electrodes (E₁ - E₄; E₁ - E₈) disposed respectively at intermediate points of respective adjacent magnetic poles and having one ends being in contact with a fluid in the cylindrical fluid path, wherein the even number of magnetic poles are corresponding in number to the cores, to the coils, and to the electrodes, and the number is equal to four or larger. </p> |
