Patent ID: 11919550
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  E | IPC B  E

Claim 6:
7. A rail breakage detection device comprising:
a first core part that is provided annularly along a circumferential direction of a first cable electrically connecting an electrical neutral point of an impedance bond to a prescribed block section of a first rail, and is made of a magnetic material to generate a first magnetic flux in accordance with return current flowing through the first cable, the impedance bond electrically connecting the first rail and a second rail in a pair,
a second core part that is provided annularly along a circumferential direction of a second cable electrically connecting the electrical neutral point of the impedance bond to the prescribed block section of the second rail, is mechanically connected to the first core part, generates a second magnetic flux in accordance with return current flowing through the second cable, and is made of a magnetic material to generate the second magnetic flux so as to cancel the first magnetic flux out when the return current flowing through the second cable is identical with the return current flowing through the first cable in terms of a direction and a magnitude, and
a Hall element that is disposed in a gap provided in either the first core part or the second core part to generate an electromotive force in accordance with a sum of the first magnetic flux and the second magnetic flux; and
a CPU configured to determine that the first rail or the second rail is broken based on the electromotive force generated by the Hall element.