JP2860453B2 - Abnormality diagnosis method and device using wireless transmission type AE signal - Google Patents
Abnormality diagnosis method and device using wireless transmission type AE signalInfo
- Publication number
- JP2860453B2 JP2860453B2 JP7176430A JP17643095A JP2860453B2 JP 2860453 B2 JP2860453 B2 JP 2860453B2 JP 7176430 A JP7176430 A JP 7176430A JP 17643095 A JP17643095 A JP 17643095A JP 2860453 B2 JP2860453 B2 JP 2860453B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- rotation
- rotating body
- abnormality
- generated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2693—Rotor or turbine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2696—Wheels, Gears, Bearings
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転機械、例えば
発電用タービンにおける回転軸に固定された動翼とケー
シングに固定された静翼といった金属間の不測の接触
や、回転軸と固定部との間に形成されているラビリンス
パッキンの不測の接触、あるいは回転軸等にクラックが
入るなどの異常事態が生じた際に発生されるアコーステ
ィック・エミッション（ＡＥと称される）信号を検出
し、その検出されたＡＥ信号を無線で伝送して異常の検
出・診断を行なう無線伝送式ＡＥ信号による異常診断方
法及びその装置に関するものである。The present invention relates to a rotating machine, for example, an unexpected contact between metal such as a moving blade fixed to a rotating shaft and a stationary blade fixed to a casing in a power generating turbine, and a rotating shaft and a fixed portion. The acoustic emission (referred to as AE) signal generated when an abnormal situation such as an unexpected contact of the labyrinth packing formed between them or a crack in the rotating shaft or the like occurs. The present invention relates to a wireless transmission type AE signal abnormality diagnosis method and apparatus for detecting and diagnosing an abnormality by wirelessly transmitting a detected AE signal.
【０００２】[0002]
【従来の技術】ＡＥ信号は、固体が変形あるいは破壊す
るときに解放されるエネルギーによって発生する弾性波
信号であり、このようなＡＥ信号を利用して上記した発
電用タービンなどの回転機械の異常を検出・診断する方
法は、例えば特開昭５４−３９１５３号公報や特公平２
−７０２６号公報などに開示されているように、従来か
ら周知である。2. Description of the Related Art An AE signal is an elastic wave signal generated by energy released when a solid is deformed or destroyed. Abnormality of a rotating machine such as a power generation turbine described above is utilized by using such an AE signal. The method of detecting and diagnosing is described in, for example, JP-A-54-39153 and
As disclosed in, for example, Japanese Patent Application Laid-Open No. 7026/1995, it is conventionally known.
【０００３】図４は従来から一般的に知られているＡＥ
信号による異常診断方法を適用した装置の概略図であ
り、図５はそのブロック構成図であり、例えば上記発電
用タービンなどの回転機械Ｍにおいて、軸受２１を介し
て機台２２に回転自在に支承された回転軸２３に固定さ
れた動翼などの回転体２０側に、ＡＥ信号を検出するＡ
Ｅセンサ１と、このＡＥセンサ１による検出ＡＥ信号を
増幅するプリアンプ２と、その増幅されたＡＥ信号を無
線伝送に適した周波数帯域に変調するＦＭ変調回路３
と、その変調された信号を電力増幅する増幅器４と、送
信アンテナ５とからなる送信装置３０が装着されている
一方、上記回転体２０から離間した位置に固定状態に設
置された静止体（図示せず）側には、受信装置４０とし
て、受信アンテナ６と、ＦＭ受信回路７と、ＦＭ復調回
路８とが装備されており、この受信装置４０側のＦＭ復
調回路８に、受信されＦＭ復調された信号を解析して上
記回転体２０の異常を診断する診断手段としてのＡＥ解
析装置９が接続されている。FIG. 4 shows an AE generally known in the art.
FIG. 5 is a schematic block diagram of an apparatus to which an abnormality diagnosis method using a signal is applied, and FIG. 5 is a block diagram of the apparatus. A to detect the AE signal on the rotating body 20 side such as a moving blade fixed to the rotating shaft 23
An E sensor 1, a preamplifier 2 for amplifying an AE signal detected by the AE sensor 1, and an FM modulation circuit 3 for modulating the amplified AE signal into a frequency band suitable for wireless transmission.
And a transmitting unit 30 including an amplifier 4 for power-amplifying the modulated signal and a transmitting antenna 5, and a stationary unit fixedly installed at a position away from the rotating unit 20 (see FIG. The receiving device 40 includes a receiving antenna 6, an FM receiving circuit 7, and an FM demodulating circuit 8 as a receiving device 40. The FM demodulating circuit 8 of the receiving device 40 receives and demodulates the received FM. An AE analyzer 9 is connected as diagnostic means for diagnosing the abnormality of the rotating body 20 by analyzing the signal obtained.
【０００４】[0004]
【発明が解決しようとする課題】上記したような無線伝
送式ＡＥ信号による異常診断方法及び装置においては、
回転体２０の回転角度によってアンテナ５，６の送・受
信感度が異なり、そのために、回転体２０の回転速度に
同期して振幅の変化があり、概ね図６に示すような波形
の回転同期信号Ｓ１（以下、ＢＧＮ信号と称する）が無
線で伝送されることになる。SUMMARY OF THE INVENTION In the above-described abnormality diagnosis method and apparatus using a wireless transmission type AE signal,
The transmission / reception sensitivities of the antennas 5 and 6 vary depending on the rotation angle of the rotator 20. Therefore, the amplitude changes in synchronization with the rotation speed of the rotator 20, and a rotation synchronization signal having a waveform substantially as shown in FIG. S1 (hereinafter referred to as a BGN signal) is transmitted wirelessly.
【０００５】ところで、上述した発電用タービンにおけ
る動翼と静翼との金属間接触やラビリンスパッキンの接
触あるいは回転軸のクラック入りなどの異常事態の発生
に伴いＡＥセンサ１により検出されるＡＥ信号Ｓ２につ
いても、上記と同様な振幅の変化がみられ、そのＡＥ信
号Ｓ２が図７の（ａ）あるいは（ｂ）に示すように、上
記のような波形のＢＧＮ信号Ｓ１に重畳されて伝送され
ることになる。したがって、回転体２０側に異常が発生
した時に伝送されてくるＡＥ信号Ｓ２と異常がない時に
も常時伝送されているＢＧＮ信号Ｓ１との識別が困難な
場合があって、異常を早期に、かつ精度よく検出するこ
とができないという問題があった。The AE signal S2 detected by the AE sensor 1 when an abnormal situation such as metal-to-metal contact between the moving blade and the stationary blade, contact of the labyrinth packing, or cracking of the rotating shaft occurs in the power generation turbine described above. , A change in amplitude similar to the above is observed, and the AE signal S2 is transmitted while being superimposed on the BGN signal S1 having the above-described waveform as shown in FIG. 7A or 7B. Will be. Therefore, it is sometimes difficult to distinguish between the AE signal S2 transmitted when an abnormality occurs on the rotating body 20 side and the BGN signal S1 which is always transmitted even when there is no abnormality. There was a problem that it was not possible to detect with high accuracy.
【０００６】本発明は上記のような実情に鑑みてなされ
たもので、振幅変化のあるＢＧＮ信号に重畳されて伝送
されるＡＥ信号の識別精度を高めて異常の発生を初期段
階で確実に検出することができる無線伝送式ＡＥ信号に
よる異常診断方法及びその装置を提供することを目的と
している。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and enhances the accuracy of identifying an AE signal transmitted by being superimposed on a BGN signal having a change in amplitude, thereby reliably detecting the occurrence of an abnormality at an early stage. It is an object of the present invention to provide a method and an apparatus for diagnosing abnormalities based on a wireless transmission type AE signal.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る無線伝送式ＡＥ信号による異常診断方
法は、回転体に装着されＡＥ信号を検出するセンサから
の信号を周波数変調して無線で送信するとともに、その
送信信号を受信し復調して上記回転体の異常を診断する
方法において、上記回転体の回転起点を検出して回転基
準信号を発生させ、この回転基準信号に同期させてＢＧ
Ｎ信号とは逆位相の信号を発生させ、その逆位相の信号
を受信側のアンプに印加して該逆位相信号でＢＧＮ信号
を相殺させることにより定常波形の信号を出力して、Ｂ
ＧＮ信号に重畳して伝送されるＡＥ信号を検出すること
を特徴とするものである。In order to achieve the above object, a method of diagnosing an abnormality by a wireless transmission type AE signal according to the present invention is to modulate the frequency of a signal from a sensor mounted on a rotating body and detecting the AE signal. In the method of diagnosing the abnormality of the rotating body by receiving and demodulating the transmission signal and detecting the rotation start point of the rotating body, a rotation reference signal is generated and synchronized with the rotation reference signal. Let me go BG
A signal having a phase opposite to that of the N signal is generated, a signal having the opposite phase is applied to an amplifier on the receiving side, and the BGN signal is canceled by the opposite phase signal to output a signal having a steady waveform.
It is characterized in that an AE signal transmitted by being superimposed on a GN signal is detected.
【０００８】また、本発明に係る無線伝送式ＡＥ信号に
よる異常診断装置は、回転体に装着され該回転体から発
生するＡＥ信号を検出するＡＥセンサと、このＡＥセン
サによる検出ＡＥ信号を増幅するプリアンプと、その増
幅されたＡＥ信号を周波数変調する周波数変調手段と、
その周波数変調された信号を無線で送信する送信手段
と、この送信手段からの信号を受信し復調する受信手段
と、その受信信号を解析して上記回転体の異常を診断す
る診断手段とを備えてなる無線伝送式ＡＥ信号による異
常診断装置において、上記回転体の回転起点を検出して
回転基準信号を発生する回転角度検出装置と、この回転
角度検出装置により発生される回転基準信号に同期して
ＢＧＮ信号とは逆位相の信号を発生する逆位相信号発生
手段とを具備し、上記逆位相信号発生手段により発生さ
れた逆位相の信号を上記受信手段側のアンプに印加して
ＢＧＮ信号を相殺させることにより定常波形の信号を出
力して、ＢＧＮ信号に重畳して伝送されるＡＥ信号を上
記診断手段で検出するように構成したことを特徴とする
ものである。[0008] Further, an abnormality diagnosis apparatus using a wireless transmission type AE signal according to the present invention is an AE sensor mounted on a rotating body for detecting an AE signal generated from the rotating body, and amplifies the AE signal detected by the AE sensor. A preamplifier, frequency modulation means for frequency-modulating the amplified AE signal,
A transmitting unit that wirelessly transmits the frequency-modulated signal; a receiving unit that receives and demodulates the signal from the transmitting unit; and a diagnostic unit that analyzes the received signal and diagnoses an abnormality of the rotating body. An abnormality diagnosis device based on a wireless transmission type AE signal, comprising: a rotation angle detection device for detecting a rotation start point of the rotating body to generate a rotation reference signal; and a rotation reference signal generated by the rotation angle detection device. And an anti-phase signal generating means for generating a signal having an anti-phase to the BGN signal. The anti-phase signal generated by the anti-phase signal generating means is applied to an amplifier on the receiving means side to generate a BGN signal. The present invention is characterized in that a signal having a steady waveform is output by canceling out the AE signal, and the AE signal transmitted by being superimposed on the BGN signal is detected by the diagnostic means.
【０００９】本発明によれば、回転体の回転にともな
い、その回転起点の検出により発生される回転基準信号
に同期してＢＧＮ信号とは逆位相の信号が発生され、こ
の逆位相の信号が受信側のアンプに印加されることで、
ＢＧＮ信号を相殺した定常波形の信号が得られることに
なる。そのため、回転体側に異常が発生したときには、
ＡＥセンサにより検出されＢＧＮ信号に重畳されて伝送
されるＡＥ信号のみが上記定常波形信号に対して大きく
突出した信号波形状況を作り出すことが可能となり、し
たがって、無線伝送方式でありながら、ＢＧＮ信号とＡ
Ｅ信号との識別性が高まり、回転体に故障などの異常が
発生したことを、初期段階で確実に、かつ、精度よく検
出することが可能である。According to the present invention, a signal having a phase opposite to that of the BGN signal is generated in synchronization with a rotation reference signal generated by detecting a rotation start point of the rotating body, and the signal having the opposite phase is generated. By being applied to the receiving side amplifier,
As a result, a signal having a steady waveform obtained by canceling the BGN signal is obtained . Therefore, when an abnormality occurs on the rotating body side,
Only the AE signal that is detected by the AE sensor and transmitted by being superimposed on the BGN signal can create a signal waveform situation that is significantly prominent with respect to the steady waveform signal. A
The discrimination from the E signal is improved, and it is possible to reliably and accurately detect the occurrence of an abnormality such as a failure in the rotating body at an initial stage.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
にもとづいて説明する。図１は本発明に係る無線伝送式
ＡＥ信号による異常診断方法の実施に使用される装置の
ブロック構成図であり、同図において、１〜９および３
０、４０は図５に示す従来例と同一の構成要素であるた
め、該当部分に同一の符号を付して、それらの説明を省
略する。なお、この装置が適用される回転機械の概要は
図４に示すとおりである。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an apparatus used for implementing an abnormality diagnosis method using a wireless transmission type AE signal according to the present invention.
Since 0 and 40 are the same components as those in the conventional example shown in FIG. 5, the corresponding portions are denoted by the same reference numerals and description thereof will be omitted. The outline of the rotary machine to which this apparatus is applied is as shown in FIG.
【００１１】図１において、１０は近接スイッチなどか
らなる回転角度検出装置であって、回転機械Ｍにおける
回転体２０（図４参照）の回転起点を検出して、回転基
準信号を発生する。１１は任意波形発生装置で、上記回
転角度検出装置１０により発生される回転基準信号に同
期してＢＧＮ信号とは逆位相の信号を発生する逆位相信
号発生手段を構成している。この任意波形発生装置１１
により発生されたＢＧＮ信号と逆位相の信号は受信装置
４０側のアンプ１２に印加されてＢＧＮ信号と相殺され
定常波形のＢＧＭ信号が出力されるように構成されてい
る。 In FIG. 1, reference numeral 10 denotes a rotation angle detection device comprising a proximity switch or the like, which detects a rotation starting point of a rotating body 20 (see FIG. 4) in the rotary machine M and generates a rotation reference signal. Reference numeral 11 denotes an arbitrary waveform generator, which constitutes an anti-phase signal generating means for generating a signal having an opposite phase to the BGN signal in synchronization with the rotation reference signal generated by the rotation angle detector 10. This arbitrary waveform generator 11
BGN signal and antiphase signal generated by the receiving device
Offset by applied to BGN signal 40 of the amplifier 12 is configured as BGM signal standing wave form is output
You.
【００１２】つぎに、上記のように構成された無線伝送
式ＡＥ信号による異常診断装置による回転機械Ｍの異常
診断動作について説明する。回転機械Ｍの回転体２０の
回転にともない、回転角度検出装置１０によりその回転
起点が検出されて回転基準信号が発生され、この発生さ
れた回転基準信号が任意波形発生装置１１に入力される
ことによって、回転基準信号に同期して該回転基準信号
とは逆位相の信号が発生され、この逆位相の信号が受信
装置４０側のアンプ１２に印加されることで、送信装置
３０側からアンテナ５，６を経て受信装置４０側に伝送
されてくる図２の（ａ）で示す波形のＢＧＮ信号Ｓ１が
相殺されて、図２の（ｂ）で示すような定常波形のＢＧ
Ｎ信号Ｓ３がアンプ１２から出力される。Next, an operation of diagnosing an abnormality of the rotating machine M by the abnormality diagnosis apparatus based on the wireless transmission type AE signal configured as described above will be described. With the rotation of the rotating body 20 of the rotary machine M, the rotation start point is detected by the rotation angle detection device 10 to generate a rotation reference signal, and the generated rotation reference signal is input to the arbitrary waveform generation device 11. As a result, a signal having an opposite phase to the rotation reference signal is generated in synchronization with the rotation reference signal, and the signal having the opposite phase is received.
By being applied to the amplifier 12 on the device 40 side , the transmission device
Transmission from the 30 side to the receiving device 40 side via the antennas 5 and 6
BGN signal S1 waveform indicated by to come in FIG. 2 (a)
Is offset, BG standing wave shape as shown in shown in FIG. 2 (b)
The N signal S3 is output from the amplifier 12 .
【００１３】ついで、アンプ１２から出力される定常波
形のＢＧＮ信号Ｓ３は、ＦＭ受信回路７で受信され、か
つ、ＦＭ復調回路８で復調され、その復調後の信号がＡ
Ｅ解析装置９に入力されて上記回転体２０の異常が診断
されるのである。Next, the standing wave output from the amplifier 12
BGN signal S3 in the form is received by the FM receiver circuit 7, and demodulated by the FM demodulation circuit 8, the demodulated signal of that is A
The abnormality is input to the E-analysis device 9 and the abnormality of the rotating body 20 is diagnosed.
【００１４】このように上記回転体２０側に金属同士や
ラビリンスパッキンの接触などの異常が発生したときに
ＡＥセンサ１により検出され図７の（ａ）あるいは
（ｂ）に示す波形のＢＧＮ信号Ｓ１に重畳され伝送され
てくるＡＥ信号Ｓ２を受信する受信装置４０側のアンプ
１２に上記逆位相信号を印加することでＢＧＮ信号Ｓ１
を相殺させて定常波形のＢＧＮ信号Ｓ３を出力させるこ
とによって、図３に示すように、定常波形のＢＧＮ信号
Ｓ３に対してＡＥ信号Ｓ２のみが大きく突出した信号波
形状況が作り出されることになり、したがって、無線伝
送方式でありながら、定常波形のＢＧＮ信号Ｓ３とＡＥ
信号Ｓ２との識別性が高まり、ＡＥ解析装置９での解析
にともなう異常の発生を、初期段階で精度よく検出する
ことが可能である。 As described above , when an abnormality such as contact between metal and labyrinth packing occurs on the rotating body 20 side, the AE sensor 1 detects the BGN signal S1 having a waveform shown in FIG. 7A or 7B. Is superimposed on and transmitted
Of the receiving device 40 that receives the incoming AE signal S2
12, the BGN signal S1
To output a BGN signal S3 having a steady waveform.
As a result, as shown in FIG. 3, a signal waveform situation in which only the AE signal S2 significantly protrudes with respect to the BGN signal S3 having the steady waveform is created. Signal S3 and AE
The discrimination from the signal S2 is enhanced, and the occurrence of an abnormality accompanying the analysis by the AE analyzer 9 can be accurately detected at an early stage .
【００１５】[0015]
【発明の効果】以上のように、請求項１および請求２の
発明によれば、回転体の回転にともない、概ねその回転
速度に同期した振幅の変化をもつ波形のＢＧＮ信号を、
受信側においてそれとは逆位相の信号で相殺して定常波
形の信号を出力させることによって、回転体側に異常が
発生したときにＡＥセンサにより検出されＢＧＮ信号に
重畳されて伝送されるＡＥ信号のみを上記定常波形信号
に対して大きく突出した信号波形状況を作り出すことが
できる。したがって、無線伝送方式でありながら、ＢＧ
Ｎ信号とＡＥ信号との識別精度を高めることが可能で、
回転体に金属同士の不測の接触や故障などの異常が発生
したとき、その事実を、初期段階で確実に、かつ、精度
よく検出することができ、回転機械の安全性、保守性の
著しい向上を図ることができるという効果を奏する。As described above, according to the first and second aspects of the present invention, the BGN signal having a waveform having a change in amplitude substantially synchronized with the rotation speed of the rotating body is produced by the rotation of the rotating body.
On the receiving side, by canceling the signal with the opposite phase to that of the signal and outputting a signal of a steady waveform, when an abnormality occurs on the rotating body side, only the AE signal detected by the AE sensor and superimposed on the BGN signal and transmitted is transmitted. It is possible to create a signal waveform situation that is significantly prominent with respect to the stationary waveform signal. Therefore, despite the wireless transmission method, BG
It is possible to improve the accuracy of distinguishing between the N signal and the AE signal,
When abnormalities such as unexpected contact between metal parts or failures occur on the rotating body, the fact can be detected reliably and accurately at the initial stage, and the safety and maintainability of the rotating machine are significantly improved. Is achieved.
【図１】図１は本発明に係る無線伝送式ＡＥ信号による
異常診断方法の実施に使用される装置のブロック構成図
である。FIG. 1 is a block diagram of an apparatus used for performing an abnormality diagnosis method using a wireless transmission type AE signal according to the present invention.
【図２】同上実施の形態による構成のＢＧＮ信号の波形
変化を示す説明図である。FIG. 2 is an explanatory diagram showing a waveform change of a BGN signal having the configuration according to the embodiment.
【図３】本発明により作り出される信号波形状況を示す
説明図である。FIG. 3 is an explanatory diagram showing a signal waveform state created by the present invention.
【図４】従来から一般的に知られているＡＥ信号による
異常診断方法を適用した装置の概略図である。FIG. 4 is a schematic view of an apparatus to which an abnormality diagnosis method using an AE signal generally known in the related art is applied.
【図５】同上装置のブロック構成図である。FIG. 5 is a block configuration diagram of the above device.
【図６】一般的なＢＧＮ信号の波形図である。FIG. 6 is a waveform diagram of a general BGN signal.
【図７】図６のＢＧＮ信号にＡＥ信号が重畳した状態の
信号波形状況の説明図である。FIG. 7 is an explanatory diagram of a signal waveform state in a state where an AE signal is superimposed on the BGN signal of FIG. 6;
１ ＡＥセンサ ２ プリアンプ ３ ＦＭ変調回路（周波数変調手段） ５ 送信アンテナ（送信手段） ６ 受信アンテナ ７ ＦＭ受信回路（受信手段） ８ ＦＭ復調回路（受信手段） ９ ＡＥ解析装置（診断手段）１２ 受信側のアンプ ２０ 回転体 Ｓ１ 振幅変化のある波形ＢＧＮ信号 Ｓ２ ＡＥ信号 Ｓ３ 定常波形のＢＧＮ信号REFERENCE SIGNS LIST 1 AE sensor 2 preamplifier 3 FM modulation circuit (frequency modulation means) 5 transmission antenna (transmission means) 6 reception antenna 7 FM reception circuit (reception means) 8 FM demodulation circuit (reception means) 9 AE analysis device (diagnosis means) 12 reception Side amplifier 20 Rotating body S1 Waveform BGN signal with amplitude change S2 AE signal S3 BGN signal of steady waveform
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塚本 繁雄 大阪府大阪市北区中之島３丁目３番22号 関西電力株式会社内 (72)発明者 福田 弘治 大阪府摂津市千里丘３丁目14番40号 東 光精機株式会社内 (72)発明者 梅川 英樹 大阪府摂津市千里丘３丁目14番40号 東 光精機株式会社内 (72)発明者 中野 拓史 大阪府摂津市千里丘３丁目14番40号 東 光精機株式会社内 (56)参考文献 特開 昭54−46080（ＪＰ，Ａ) 特開 昭56−63220（ＪＰ，Ａ) 特開 昭57−35752（ＪＰ，Ａ) 特開 平５−99790（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G01H 17/00 G01M 19/00 G01N 29/14──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigeo Tsukamoto 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Inside Kansai Electric Power Company (72) Inventor Koji Fukuda 3- 14-40 Senrioka, Settsu-shi, Osaka Inside Toko Seiki Co., Ltd. (72) Inventor Hideki Umekawa 3--14-40 Senrioka, Settsu-shi, Osaka Prefecture Inside Toko Seiki Co., Ltd. (72) Takumi Nakano 3-14-40 Senrioka, Settsu-shi, Osaka Tokou Toko Seiki Co., Ltd. (56) References JP-A-54-46080 (JP, A) JP-A-56-63220 (JP, A) JP-A-57-35752 (JP, A) JP-A-5-99790 (JP) , A) (58) Fields investigated (Int. Cl. 6 , DB name) G01H 17/00 G01M 19/00 G01N 29/14
Claims (2)
ミッション（ＡＥ）信号を検出するセンサからの信号を
周波数変調して無線で送信するとともに、その送信信号
を受信し復調して上記回転体の異常を診断する方法にお
いて、 上記回転体の回転起点を検出して回転基準信号を発生さ
せ、この回転基準信号に同期させて回転同期信号とは逆
位相の信号を発生させ、 その逆位相の信号を受信側のアンプに印加して該逆位相
信号で回転同期信号を相殺させることにより定常波形の
信号を出力して、回転同期信号に重畳して伝送されるＡ
Ｅ信号を検出することを特徴とする無線伝送式ＡＥ信号
による異常診断方法。1. A signal from a sensor mounted on a rotating body and detecting an acoustic emission (AE) signal is frequency-modulated and transmitted wirelessly, and the transmission signal is received and demodulated to detect an abnormality of the rotating body. In the diagnosis method, a rotation reference signal is generated by detecting a rotation start point of the rotating body, a signal having a phase opposite to the rotation synchronization signal is generated in synchronization with the rotation reference signal, and a signal having the opposite phase is received. A signal having a steady waveform is output by applying the signal to the amplifier on the side and canceling the rotation synchronizing signal with the opposite phase signal, and the signal A is superimposed on the rotation synchronizing signal and transmitted.
An abnormality diagnosis method using a wireless transmission type AE signal, comprising detecting an E signal.
ＡＥ信号を検出するＡＥセンサと、このＡＥセンサによ
る検出ＡＥ信号を増幅するプリアンプと、その増幅され
たＡＥ信号を周波数変調する周波数変調手段と、その周
波数変調された信号を無線で送信する送信手段と、この
送信手段からの信号を受信し復調する受信手段と、その
受信信号を解析して上記回転体の異常を診断する診断手
段とを備えてなる無線伝送式ＡＥ信号による異常診断装
置において、 上記回転体の回転起点を検出して回転基準信号を発生す
る回転角度検出装置と、この回転角度検出装置により発
生される回転基準信号に同期して回転同期信号とは逆位
相の信号を発生する逆位相信号発生手段とを具備し、 上記逆位相信号発生手段により発生された逆位相の信号
を上記受信手段側のアンプに印加して回転同期信号を相
殺させることにより定常波形の信号を出力して、回転同
期信号に重畳して伝送されるＡＥ信号を上記診断手段で
検出するように構成したことを特徴とする無線伝送式Ａ
Ｅ信号による異常診断装置。2. An AE sensor mounted on a rotating body for detecting an AE signal generated from the rotating body, a preamplifier for amplifying an AE signal detected by the AE sensor, and a frequency modulation for frequency-modulating the amplified AE signal. Means, transmitting means for wirelessly transmitting the frequency-modulated signal, receiving means for receiving and demodulating a signal from the transmitting means, and diagnosing means for analyzing the received signal and diagnosing an abnormality of the rotating body. An abnormality diagnosis device based on a wireless transmission type AE signal, comprising: a rotation angle detection device that detects a rotation start point of the rotating body to generate a rotation reference signal; and a rotation reference signal generated by the rotation angle detection device. ; and a reverse phase signal generating means for generating a signal of opposite phase to the rotation synchronizing signal in synchronism with, the reverse phase signal generated by the anti-phase signal generating means Outputs a signal of the standing wave form by offsetting the amplifier to the rotation synchronizing signal is applied Shin means side, to the AE signal is transmitted while superimposed on the rotation synchronizing signal is configured to detect by the diagnostic means Wireless transmission type A characterized by:
An abnormality diagnosis device based on the E signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176430A JP2860453B2 (en) | 1995-07-12 | 1995-07-12 | Abnormality diagnosis method and device using wireless transmission type AE signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176430A JP2860453B2 (en) | 1995-07-12 | 1995-07-12 | Abnormality diagnosis method and device using wireless transmission type AE signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0926414A JPH0926414A (en) | 1997-01-28 |
| JP2860453B2 true JP2860453B2 (en) | 1999-02-24 |
Family
ID=16013572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7176430A Expired - Fee Related JP2860453B2 (en) | 1995-07-12 | 1995-07-12 | Abnormality diagnosis method and device using wireless transmission type AE signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2860453B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5088175B2 (en) * | 2008-02-29 | 2012-12-05 | Ｊｆｅスチール株式会社 | Rotation axis abnormality diagnosis device |
| JP2012042391A (en) * | 2010-08-20 | 2012-03-01 | Jfe Steel Corp | Abnormality diagnosis apparatus of rotor |
| JP5940213B2 (en) * | 2012-05-02 | 2016-06-29 | シーメンス アクチエンゲゼルシヤフトＳｉｅｍｅｎｓ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | Method for monitoring shaft damage |
| JP6567268B2 (en) | 2014-11-18 | 2019-08-28 | 株式会社東芝 | Signal processing device, server device, detection system, and signal processing method |
| US11519820B2 (en) | 2018-09-19 | 2022-12-06 | Rolls-Royce Deutschland Ltd & Co Kg | Method and device for monitoring a journal bearing |
-
1995
- 1995-07-12 JP JP7176430A patent/JP2860453B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0926414A (en) | 1997-01-28 |
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