Title:
RELAY STATE DETERMINATION DEVICE, RELAY STATE DETERMINATION SYSTEM, RELAY STATE DETERMINATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/121768
Kind Code:
A1
Abstract:
Provided is a relay state determination device which is capable of determining, with good precision, whether a relay has deteriorated. The relay state determination device (10) comprises a voltage value acquisition unit (22), a contact point bounce time acquisition unit (28a), and a state determination unit (28b). The voltage value acquisition unit (22) acquires a voltage value between a pair of contact points (4b1, 4b2) which both open and close a relay (4).
The contact point bounce time acquisition unit (28a) derives a contact point bounce time (Tb) indicated by the pair of contact points (4b1, 4b2) on the basis of a time change of the voltage value after a switch-on command in regard to the relay (4).
The state determination unit (28b) compares the contact point bounce time (Tb) with a time threshold value (Tth), and determines whether the relay (4) has deteriorated.
Inventors:
MATSUO SHINYA (JP)
YAMAZAKI TAKUYA (JP)
YAMAZAKI TAKUYA (JP)
Application Number:
PCT/JP2019/045579
Publication Date:
June 18, 2020
Filing Date:
November 21, 2019
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
H01H47/00
Foreign References:
| JPH11316262A | 1999-11-16 | |||
| JP2011215131A | 2011-10-27 | |||
| JPS57199963A | 1982-12-08 | |||
| JP2011210546A | 2011-10-20 |
Other References:
See also references of EP 3872832A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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