| 摘要 |
Provided is a speed detection device of an eddy current meter, the speed detection device capable of reducing the cost by reduction in the number of components and maintaining stable detection accuracy. In an eddy current meter (C) provided with a magnet rotor (2) which rotates with a main shaft (1), a rotor (3) which rotates with the rotation of the magnet rotor (2), a pointer shaft (5) which is affixed to the rotor (3) and to which a pointer (4) is attached, and a frame body (6) which secures the main shaft (1) and in which the magnet rotor (2) and the rotor (3) are disposed, a speed detection device is provided with a magnetic detection element (7) provided near the magnet rotor (2), a circuit board (8) on which the magnetic detection element (7) is disposed, and a holder (9) which holds the circuit board (8) in the frame body (6), a pair of arm pieces (9b, 9c) is provided in the holder (9), the respective arm pieces (9b, 9c) are affixed to the frame body (6) via first and second screws (10a, 10b), and the magnetic detection element (7) is located on a line (L) connecting a mounting position (X) by the first screw (10a) and a mounting position (Y) by the second screw (10b).
|
