Judging system for detecting failure of machine
First Claim
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1. 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.
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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.
861 Citations
5 Claims
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1. A method for detecting a failure of a machine comprising the steps of;
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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. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneeMitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation), Shima Ichiji Kansai Electric Power Company Incorporated, Teshima Hiroshi Kansai Electric Power Company Incorporated
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Original AssigneeHiroshi Teshima, Ichiji Shima, Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
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InventorsKoizumi, Takayuki, Inoue, Satoru, Shima, Ichiji, Teshima, Hiroshi
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Primary Examiner(s)Gruber, Felix D.
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Application NumberUS06/140,832Time in Patent Office986 DaysField of Search364/507, 364/508, 364/550, 364/551, 364/734, 340/665, 340/669, 340/682, 340/683, 73/579, 73/593, 73/660, 235/92 PEUS Class Current702/56CPC Class CodesG01H 1/003 of rotating machines G01H1/...G07C 3/00 Registering or indicating t...G08B 23/00 Alarms responsive to unspec...
