US4366544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Judging system for detecting failure of machine
Assignee: SHIMA ICHIJI KANSAI ELECTRIC POWER Co Inc
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Filing: 1980-04-16
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Granted: 1982-12-28
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Expires: 2000-04-16
Abstract
Abstract A system for detecting whether a machine is in the normal or abnormal state by comparing detected values of waveforms of signals such as vibration generated from the machine with a set value a plurality of times to indicate failure of the machine when the detected values reach the set value a predetermined number of times.
Inventors
- 👤 Ichiji Shima
- 👤 Hiroshi Teshima
- 👤 Takayuki Koizumi
- 👤 Satoru Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
G; G01; G01H; G01H1/00; G01H1/003; G07; G07C; G07C3/00; G08; G08B; G08B23/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A method for detecting a failure of a machine comprising the steps of; detecting output signals from said machine by the use of a detection unit; filtering said detected signals in a low-pass filter; converting the output of said filter to a digital output in a A/D converter; operating upon the digital output of said converter in an arithmetic unit and comparing in a comparing unit the output of said arithmetic unit with a set value to display the possibility of failure of said machine: performing plural operation of said detection unit, said A/D converter unit, said arithmetic unit and said comparator unit for detecting said signals and comparing the output given by said arithmetic unit with a set value to indicate the failure of said machine when said outputs of said arithmetic unit exceed said set value a predetermined number of times.
Claim 2
Independent Claim
143 words
A method for detecting a failure of a machine comprising the steps of; detecting output signals from said machine by the use of a detection unit; filtering said detected signals in a low-pass filter; converting the output of said filter to a digital output in a A/D converter; operating upon the digital output of said converter in an arithmetic unit and comparing in a comparing unit the output of said arithmetic unit with a set value to display the possibility of failure of said machine: performing plural operation of said detection unit, said A/D converter unit, said arithmetic unit and said comparator unit for detecting said signals and comparing the output given by said arithmetic unit with a set value to indicate the failure of said machine when said outputs of said arithmetic unit exceed said set value a predetermined number of times.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said arithmetic unit provides peak values of the detected signals.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein said arithmetic units provides peak values and effective values of the detected signals.
Claim 5
Dependent Claim
26 words
The method of claim 1, 2 or 4 wherein the signals generated from said machine are signals for vibration of a bearing of a rotary machine.
Claim 6
Dependent Claim
26 words
The method of claim 1, 2 or 3 wherein the signals generated from said machine are sound signals generated by a bearing of a rotary machine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |