JPS60220827A - Vibration analyzing apparatus - Google Patents
Vibration analyzing apparatusInfo
- Publication number
- JPS60220827A JPS60220827A JP7772184A JP7772184A JPS60220827A JP S60220827 A JPS60220827 A JP S60220827A JP 7772184 A JP7772184 A JP 7772184A JP 7772184 A JP7772184 A JP 7772184A JP S60220827 A JPS60220827 A JP S60220827A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- calculator
- amplitude
- phase
- input
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/003—Measuring characteristics of vibrations in solids by using direct conduction to the detector of rotating machines
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は振動分析装置に係り、特に蒸気タービン等の回
転体の軸振動分析装置や船体振動等回転体の回転に起因
する構造物の振動分析装置等に適用し得る振動分析装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration analyzer, and is particularly applicable to a shaft vibration analyzer of a rotating body such as a steam turbine, a vibration analyzer of a structure caused by the rotation of a rotary body such as ship vibration, etc. This invention relates to a vibration analyzer.
この種振動分析装置の従来例を第1図に基いて説明する
。第1図に示すものは、トラッキングフィルタによる振
動分析装置の構成例であり、振動検出器02により検出
した振動信号をトラッキングフィルタ04の一方の入力
端に入力し、トラッキングフィルタ04の他方の入力端
には回転体01より回転検出器03により検出した回転
信号を入力する。トラッキングフィルタ04の出力は振
幅演算器05及び位相計06へ入力され振幅演算器05
からは振幅出力Aが位相計06には回転検出器03から
の回転信号も入力され、回転信号と振動信号間の位相差
出力Bが出力されるようになされている。A conventional example of this type of vibration analyzer will be explained with reference to FIG. What is shown in FIG. 1 is a configuration example of a vibration analysis device using a tracking filter, in which a vibration signal detected by a vibration detector 02 is inputted to one input terminal of a tracking filter 04, and the other input terminal of the tracking filter 04 is inputted to one input terminal of the tracking filter 04. The rotation signal detected by the rotation detector 03 from the rotating body 01 is input to the rotation body 01 . The output of the tracking filter 04 is input to the amplitude calculator 05 and the phase meter 06.
The rotation signal from the rotation detector 03 is also input to the phase meter 06, and the phase difference output B between the rotation signal and the vibration signal is output.
第1図に示された回転体01の振動や回転体01の回転
に起因する構造物の振動を分析する装置では、回転体0
1の回転信号によりバンドパスフィルタの一種であるト
ラッキングフィルタ04の中心周波数をたえず回転数に
合わせて調整する。これに振動検出器02からの振動信
号を通すことにより回転周波数成分の正弦波状の振動信
号が得られる。この信号を振幅波p、器05により振動
振幅に比例した直δを電圧Aに変換し、又、位相計06
により正弦波状の振動信号と回転信号との位相差をめ、
これに比例した直流電圧Bに変換するものである。In the apparatus for analyzing vibrations of the rotating body 01 shown in FIG. 1 and vibrations of structures caused by the rotation of the rotating body 01,
The center frequency of a tracking filter 04, which is a type of band-pass filter, is constantly adjusted according to the number of rotations using the rotation signal No. 1. By passing the vibration signal from the vibration detector 02 through this, a sinusoidal vibration signal having a rotational frequency component is obtained. This signal is converted into an amplitude wave p, a direct current δ proportional to the vibration amplitude is converted into a voltage A by a device 05, and a phase meter 06
Determine the phase difference between the sinusoidal vibration signal and the rotation signal by
This is converted into a DC voltage B proportional to this.
しかしながら上記従来例に示された装置においては、ト
ラッキングフィルタや位相針等はその回路構成が複雑で
あるので高価であるとともに、素子数が多いために故障
率が高い等の欠点があり、制御装置や監視装置として祉
コスト信頼性の両面の問題からその適用が困難であった
。However, in the device shown in the above-mentioned conventional example, the tracking filter, phase needle, etc. have drawbacks such as being expensive because of their complicated circuit configurations, and having a high failure rate due to the large number of elements. It has been difficult to apply it as a monitoring device due to issues of both safety, cost, and reliability.
本発明は上記の事情に鑑みて提案されたもので、その目
的とするところは、構成が簡単且つ安価であり、長期間
に亘って安定して動作し得る振動分析装置を提供するこ
とにある。The present invention was proposed in view of the above circumstances, and its purpose is to provide a vibration analyzer that has a simple and inexpensive configuration and can operate stably over a long period of time. .
本発明による振動分析装置は、回転体上に偏心して取付
けられた円板の円周側面にそれぞれ対面して円周方向に
90度の角度をもって取付けられた2個の変位検出器と
、それぞれ一方の入力端に上記変位検出器の各一方の変
位信号を各別個に入力し、それぞれ他方の入力端に振動
信号を入力する2個の乗算器と、これらの各乗算器の出
力をそれぞれ別個に入力する2個の積分器と、これらの
各積分器の各出力をそれぞれ同時に入力する振幅演算器
および位相演算器とを具備してなることをq#徴とし、
回転体上に偏心して取付けた円板と同円板の円周側面に
対面して90度の角度をもって取付けた2個の変位検出
器により90度の位相差をもつ2つの正弦波を発生させ
、それぞれに振動信号を乗算、積分することによりフー
リエ変換による実数部、虚数部に相当する成分を得るこ
とにより、前記従来の欠点を解消し得るようにしたもの
である。The vibration analyzer according to the present invention includes two displacement detectors each mounted at an angle of 90 degrees in the circumferential direction and facing the circumferential side surface of a disk eccentrically mounted on a rotating body, and two displacement detectors each mounted at a 90 degree angle in the circumferential direction. two multipliers each inputting the displacement signal of each one of the displacement detectors separately to the input terminal of the input terminal, and inputting the vibration signal to the other input terminal of the two multipliers; The q# characteristic is that it is equipped with two integrators that input, and an amplitude calculator and a phase calculator that simultaneously input each output of each of these integrators,
Two sine waves with a phase difference of 90 degrees are generated by a disc mounted eccentrically on a rotating body and two displacement detectors mounted at an angle of 90 degrees facing the circumferential side of the disc. , respectively, by multiplying and integrating vibration signals to obtain components corresponding to the real part and imaginary part by Fourier transform, thereby making it possible to eliminate the above-mentioned drawbacks of the conventional method.
本発明の一実施例を添付図面を参照して詳細に説明する
。An embodiment of the present invention will be described in detail with reference to the accompanying drawings.
第2図は本発明の一実施例の構成を示す図、第3図は第
2図のI−1線に沿い矢印方向にみた平面図である。FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a plan view taken along line I-1 in FIG. 2 in the direction of the arrow.
第2図および第3図において、1は回転体、2は振動検
出器、10は円板、11&、11bは各変位検出器、1
2*、1;2bは各乗算器、13m、13bは各積分器
、14は振幅演算器、15は位相@算器である。In FIGS. 2 and 3, 1 is a rotating body, 2 is a vibration detector, 10 is a disk, 11&, 11b is each displacement detector, 1
2*, 1; 2b is each multiplier, 13m, 13b is each integrator, 14 is an amplitude calculator, and 15 is a phase @ calculator.
第2図およびあ3図に示されたように、回転体1上に偏
心して取付けられた円板Joの円周側面に対面して90
度の角度をもって取付けられた24−の変位検出器11
a、llbの出力をそれぞれ乗算器12h、12bに入
力する。これらの各乗算器12m 、 12bには振動
検出器2の出力も入力される。各乗算器12IL、12
bの出力は、それぞれ積分器13h、13bへ入力され
る。21關の積分器13m、13bの出力より振幅演算
器14で振動振幅Aを、また位相演算器15により位相
差Bを演算し出力するようになされている。As shown in Fig. 2 and Fig. 3, a 90°
24-degree displacement detector 11 mounted at an angle of
The outputs of a and llb are input to multipliers 12h and 12b, respectively. The output of the vibration detector 2 is also input to each of these multipliers 12m and 12b. Each multiplier 12IL, 12
The outputs of b are input to integrators 13h and 13b, respectively. An amplitude calculator 14 calculates a vibration amplitude A, and a phase calculator 15 calculates a phase difference B from the outputs of the 21st integrators 13m and 13b.
上記本発明の一実施例の作用について説明する。The operation of the above embodiment of the present invention will be explained.
第2図および第3図において、回転体1上に偏心して取
付けられた円板1oとこれの側面に対面して90度の角
度をもって取付けられた2個の変位検出器11a、ll
bにより円板100回転変位を検出する。この円板1o
の回転変位は偏心量が円板10の直径に対し数パーセン
ト以下の場合に正弦波状となる。このため、2髄の変位
検出器11m、Ilbの検出信号は90度の位相差をも
つ正弦波状信号、すなわち正弦波(81n vrt )
、余弦波[Cos wt]とみなすことができる。こ
れに振動検出器2により検出した振動信号EX)を乗算
器12m、12bにより乗算し、任意の時定数に設定さ
れた平滑回路機能をもつ\積分器I Ja 、 I J
bを通すことにより、次式で示されるフーリエ変換
’ J。In FIGS. 2 and 3, a disc 1o is eccentrically mounted on a rotating body 1, and two displacement detectors 11a and 11 are mounted at an angle of 90 degrees facing the side surfaces of the disc 1o.
100 rotational displacement of the disk is detected by b. This disk 1o
The rotational displacement becomes sinusoidal when the amount of eccentricity is several percent or less with respect to the diameter of the disk 10. Therefore, the detection signals of the two-marrow displacement detectors 11m and Ilb are sinusoidal signals with a phase difference of 90 degrees, that is, sine waves (81n vrt ).
, can be regarded as a cosine wave [Cos wt]. This is multiplied by the vibration signal EX) detected by the vibration detector 2 using multipliers 12m and 12b, and the integrators I Ja and I J have a smoothing circuit function set to an arbitrary time constant.
By passing through b, the Fourier transform 'J is given by the following equation.
X 16F)−x(t)* Coo wt下
Xx &)=+、E4oz(t)#81n wtただし
xR←);フーリエ変換実数部X、←);フーリエ変
換虚数部
と等価のアナログ回路となり得る。X 16F) - x (t) * Coo wt lower Xx &) = +, E4oz (t) #81n wt where xR←); Fourier transform real part X, ←); Can be an analog circuit equivalent to Fourier transform imaginary part .
これよりその振動振幅A を振幅演算器14でその位相差Bを を位相部n器15で演算し出力する。From this, the vibration amplitude A The amplitude calculator 14 calculates the phase difference B. is calculated by the phase unit n unit 15 and output.
以上により本発明によれば、乗a4器、積分器等の比較
的簡単な回路構成で回転体の回転数成分のトラッキング
分析ができるとともに、安価で信頼性の高い振動分析装
置を提供できる優れた効果が奏せられるものである。As described above, according to the present invention, it is possible to perform tracking analysis of the rotational speed component of a rotating body with a relatively simple circuit configuration such as a multiplier and an integrator, and also to provide an inexpensive and highly reliable vibration analysis device. It is something that can be effective.
第1図は従来例の構成を示す図、卯、2図は本発明の一
実施例の構成を示す図、第3図は第2図のト」線に沿い
矢印方向にみた平面図である。
1・・・回転体、2・・・振動検出器、10・・・円板
、11*、11b=変位検出器、12m、12b・・・
乗算器、13a、13b・・・積分器、14・・・振幅
演算器、15・・・位相演算器。FIG. 1 is a diagram showing the configuration of a conventional example, Figure 2 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a plan view taken along the line T in FIG. 2 in the direction of the arrow. . 1...Rotating body, 2...Vibration detector, 10...Disc, 11*, 11b=displacement detector, 12m, 12b...
Multiplier, 13a, 13b... Integrator, 14... Amplitude calculator, 15... Phase calculator.
Claims (1)
ぞれ対面して円周方向に90度の角度をもって取付けら
れた2個の変位検出器と、それぞれ一方の入力端に上記
変位検出器の各一方の変位信号を各別個に入力し、それ
ぞれ他方の入力端に振動信号を入力する2個の乗算器と
、これらの各乗算器の出力をそれぞれ別個に入力する2
個の積分器と、これらの各積分器の各出力をそれぞれ同
時に入力する振幅演n器および位相演算器とを具備して
なることを慣徴とする振動分析装置。Two displacement detectors are mounted at an angle of 90 degrees in the circumferential direction so as to face each other on the circumferential side surface of a disc mounted eccentrically on the rotating body, and the above-mentioned displacement detector is attached to one input end of each of the displacement detectors. two multipliers into which the displacement signal of one side is separately input, and the vibration signal is input into the other input terminal, and two multipliers into which the outputs of each of these multipliers are input separately, respectively.
1. A vibration analysis device characterized by comprising: integrators, and an amplitude calculator and a phase calculator which simultaneously input the respective outputs of these integrators.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772184A JPS60220827A (en) | 1984-04-18 | 1984-04-18 | Vibration analyzing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7772184A JPS60220827A (en) | 1984-04-18 | 1984-04-18 | Vibration analyzing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60220827A true JPS60220827A (en) | 1985-11-05 |
Family
ID=13641753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7772184A Pending JPS60220827A (en) | 1984-04-18 | 1984-04-18 | Vibration analyzing apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60220827A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008032454A (en) * | 2006-07-27 | 2008-02-14 | Toshiba Corp | Apparatus and method for detecting vibration phase |
JP2013228245A (en) * | 2012-04-25 | 2013-11-07 | Toshiba Corp | Vibration measuring system and vibration measuring method |
-
1984
- 1984-04-18 JP JP7772184A patent/JPS60220827A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008032454A (en) * | 2006-07-27 | 2008-02-14 | Toshiba Corp | Apparatus and method for detecting vibration phase |
JP2013228245A (en) * | 2012-04-25 | 2013-11-07 | Toshiba Corp | Vibration measuring system and vibration measuring method |
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