| 摘要 |
PROBLEM TO BE SOLVED: To provide an electric conduction information measurement device with improved shield performance for blocking an external magnetic field.SOLUTION: An electric conduction information measurement device for measuring a current flowing in an electric wire 5 includes: a magnetic substance core 1 made of a magnetic material, formed to have a cylindrical shape enclosing the electric wire 5 in a circumferential direction, and having a notched part 11 for allowing an inner peripheral surface side to communicate with an outer peripheral surface side in an axial direction; a magnetoelectric conversion element 2 mounted on a circuit board 4 so as to face the electric wire 5 through the notched part 11 and converting the intensity of a magnetic field generated by the current flowing in the electric wire 5 into an electric signal; and a magnetic substance shield 3 made of a magnetic material and arranged to face the notched part 11 via the circuit board 4. The magnetic substance shield 3 includes: a plate part 31 whose upper surface faces the circuit board 4; and multiple ribs 32 formed on the upper surface of the plate part 31, where the magnetoelectric conversion element 2 is positioned between the pair of ribs 32. |
