JP2017167027A5 - - Google Patents

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JP2017167027A5
JP2017167027A5 JP2016053679A JP2016053679A JP2017167027A5 JP 2017167027 A5 JP2017167027 A5 JP 2017167027A5 JP 2016053679 A JP2016053679 A JP 2016053679A JP 2016053679 A JP2016053679 A JP 2016053679A JP 2017167027 A5 JP2017167027 A5 JP 2017167027A5
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value
threshold value
machine element
monitoring system
temporal change
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JP2016053679A
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JP6639288B2 (en
JP2017167027A (en
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Priority claimed from JP2016053679A external-priority patent/JP6639288B2/en
Priority to JP2016053679A priority Critical patent/JP6639288B2/en
Priority to US16/085,878 priority patent/US11460005B2/en
Priority to PCT/JP2017/010659 priority patent/WO2017159784A1/en
Priority to EP17766780.5A priority patent/EP3431952B1/en
Priority to CN201780018017.1A priority patent/CN108780025B/en
Publication of JP2017167027A publication Critical patent/JP2017167027A/en
Publication of JP2017167027A5 publication Critical patent/JP2017167027A5/ja
Publication of JP6639288B2 publication Critical patent/JP6639288B2/en
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Claims (5)

装置を構成する機械要素の状態を監視する状態監視システムであって、
前記機械要素の振動波形を計測するための振動センサと、
前記機械要素の異常を診断するための処理装置とを備え、
前記処理装置は、
一定時間内に前記振動センサから出力される振動波形データの実効値を特徴付ける評価値を、時間的に連続して演算する評価値演算部と、
前記評価値の時間的変化の推移に基づいて前記機械要素の異常を診断する診断部とを含み、
前記評価値演算部は、前記評価値として、前記一定時間内における前記振動波形データの実効値の最低値を演算する、状態監視システム。 A state monitoring system for monitoring the state of machine elements constituting the apparatus,
A vibration sensor for measuring a vibration waveform of the machine element;
A processing device for diagnosing an abnormality of the machine element,
The processor is
An evaluation value calculating unit that continuously calculates an evaluation value that characterizes an effective value of vibration waveform data output from the vibration sensor within a certain period of time; and
A diagnostic unit for diagnosing an abnormality of the machine element based on a transition of a temporal change of the evaluation value,
The said evaluation value calculating part is a state monitoring system which calculates the minimum value of the effective value of the said vibration waveform data in the said fixed time as the said evaluation value. 前記診断部は、前記評価値が閾値を超えたときに、前記機械要素の異常と診断するように構成され、
前記処理装置は、前記閾値を設定する設定部をさらに含み、
前記設定部は、前記閾値を、前記機械要素が正常であるときの前記最低値の時間的変化の推移よりも大きく、かつ、前記機械要素が異常であるときの前記最低値の時間的変化の推移よりも小さい値に設定する、請求項１に記載の状態監視システム。 The diagnosis unit is configured to diagnose an abnormality of the machine element when the evaluation value exceeds a threshold value,
The processing apparatus further includes a setting unit for setting the threshold value,
The setting unit sets the threshold value to be larger than a transition of a temporal change of the minimum value when the mechanical element is normal and the temporal change of the minimum value when the mechanical element is abnormal. The state monitoring system according to claim 1, wherein the state monitoring system is set to a value smaller than the transition. 前記診断部は、前記評価値の時間的変化率が閾値を超えたときに、前記機械要素の異常と診断するように構成され、
前記処理装置は、前記閾値を設定する設定部をさらに含み、
前記設定部は、前記閾値を、前記機械要素が正常であるときの前記最低値の時間的変化率よりも大きく、かつ、前記機械要素が異常であるときの前記最低値の時間的変化率よりも小さい値に設定する、請求項１に記載の状態監視システム。 The diagnostic unit is configured to diagnose an abnormality of the machine element when a temporal change rate of the evaluation value exceeds a threshold value,
The processing apparatus further includes a setting unit for setting the threshold value ,
The setting unit is configured such that the threshold value is larger than a temporal change rate of the minimum value when the mechanical element is normal, and more than a temporal change rate of the minimum value when the mechanical element is abnormal. The state monitoring system according to claim 1, wherein is set to a small value. 前記診断部は、前記評価値が第１閾値を超え、かつ、前記評価値の時間的変化率が第２閾値を超えたときに、前記機械要素の異常と診断するように構成され、
前記処理装置は、前記第１閾値および前記第２閾値を設定する設定部をさらに含み、
前記設定部は、前記第１閾値を、前記機械要素が正常であるときの前記最低値の時間的推移よりも大きく、かつ、前記機械要素が異常であるときの前記最低値の時間的推移よりも小さい値に設定し、
前記設定部は、さらに、前記第２閾値を、前記機械要素が正常であるときの前記最低値の時間的変化率よりも大きく、かつ、前記機械要素が異常であるときの前記最低値の時間的変化率よりも小さい値に設定する、請求項１に記載の状態監視システム。 The diagnostic unit is configured to diagnose an abnormality of the machine element when the evaluation value exceeds a first threshold value and a temporal change rate of the evaluation value exceeds a second threshold value,
The processing apparatus further includes a setting unit that sets the first threshold value and the second threshold value ,
The setting unit is configured such that the first threshold value is larger than the time transition of the minimum value when the machine element is normal and the time transition of the minimum value when the machine element is abnormal. Is set to a smaller value,
The setting unit further sets the second threshold value to be larger than a temporal change rate of the minimum value when the machine element is normal and the time of the minimum value when the machine element is abnormal. The condition monitoring system according to claim 1, wherein the condition monitoring system is set to a value smaller than a dynamic change rate. 請求項１〜４のいずれか１項に記載の状態監視システムを備える、風力発電装置。   A wind turbine generator comprising the state monitoring system according to any one of claims 1 to 4.
JP2016053679A 2016-03-17 2016-03-17 Condition monitoring system and wind power generator Active JP6639288B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2016053679A JP6639288B2 (en) 2016-03-17 2016-03-17 Condition monitoring system and wind power generator
CN201780018017.1A CN108780025B (en) 2016-03-17 2017-03-16 State monitoring system and wind power generation device
PCT/JP2017/010659 WO2017159784A1 (en) 2016-03-17 2017-03-16 Condition monitoring system and wind power generation device
EP17766780.5A EP3431952B1 (en) 2016-03-17 2017-03-16 Condition monitoring system and wind turbine generation apparatus
US16/085,878 US11460005B2 (en) 2016-03-17 2017-03-16 Condition monitoring system and wind turbine generation apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2016053679A JP6639288B2 (en) 2016-03-17 2016-03-17 Condition monitoring system and wind power generator

Publications (3)

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JP2017167027A JP2017167027A (en) 2017-09-21
JP2017167027A5 true JP2017167027A5 (en) 2019-04-11
JP6639288B2 JP6639288B2 (en) 2020-02-05

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JP2016053679A Active JP6639288B2 (en) 2016-03-17 2016-03-17 Condition monitoring system and wind power generator

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Publication number Priority date Publication date Assignee Title
WO2020195691A1 (en) * 2019-03-28 2020-10-01 Ntn株式会社 State monitoring system

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* Cited by examiner, † Cited by third party
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JPH08110262A (en) * 1994-10-12 1996-04-30 Toshiba Corp On-line rotary object diagnostic device
US6370957B1 (en) * 1999-12-31 2002-04-16 Square D Company Vibration analysis for predictive maintenance of rotating machines
JP2002022617A (en) * 2000-07-05 2002-01-23 Mitsubishi Electric Corp Apparatus for diagnosing bearing
JP2003050157A (en) * 2001-08-07 2003-02-21 Mitsubishi Electric Corp Bearing diagnostic apparatus
JP5308852B2 (en) * 2009-02-03 2013-10-09 オークマ株式会社 Method and device for determining lubrication state of rolling bearing
JP5725833B2 (en) * 2010-01-04 2015-05-27 Ntn株式会社 Rolling bearing abnormality diagnosis device, wind power generation device and abnormality diagnosis system
JP2017026421A (en) * 2015-07-21 2017-02-02 日本精工株式会社 Bearing abnormality diagnosis device

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