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Title:
ELECTROMAGNETIC RELAY DIAGNOSIS DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/159233
Kind Code:
A1
Abstract:
This electromagnetic relay diagnosis device (100) comprises: an operation detection unit (1A) provided with a first light-emitting unit for emitting light when a current flows through a wiring (52) leading to a coil (51) in an electromagnetic relay (5); an operation detection unit (1B) provided with a second light-emitting unit for emitting light when the current ceases to flow in the wiring (52); an operation detection unit (2A) provided with a third light-emitting unit for emitting light when a change is detected in the energization state of the wiring (54) leading to a contact (53) in the electromagnetic relay (5); an operation detection unit (2B) provided with a fourth light-emitting unit for emitting light when a cancellation of the change in the energization state of the wiring (54) is detected; an image capture unit (6) for capturing moving images of the operation detection units (1A, 1B, 2A, 2B); and a diagnosis unit (8) that uses the moving images to calculate a contact on-operation time and a contact off-operation time, and that diagnoses whether or not an anomaly is occurring in the electromagnetic relay (5).

Inventors:
FUJIOKA, Katsuhiko (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
JP2018/004901
Publication Date:
August 22, 2019
Filing Date:
February 13, 2018
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
H01H47/00
Foreign References:
JPH08205128A1996-08-09
JP2004220288A2004-08-05
Attorney, Agent or Firm:
TAKAMURA, Jun (Sakai International Patent Office, Toranomon Mitsui Building 8-1, Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, 〒1000013, JP)
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