CN102928160A - Method for measuring dynamic balance of machinery - Google Patents
Method for measuring dynamic balance of machinery Download PDFInfo
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- CN102928160A CN102928160A CN2012104736551A CN201210473655A CN102928160A CN 102928160 A CN102928160 A CN 102928160A CN 2012104736551 A CN2012104736551 A CN 2012104736551A CN 201210473655 A CN201210473655 A CN 201210473655A CN 102928160 A CN102928160 A CN 102928160A
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Abstract
The invention discloses a method for measuring dynamic balance of machinery. The method provided by the invention comprises a first operational amplifier A1, a second operational amplifier A2, a third operational amplifier A3, eight resistors R1-R8 and two potentiometers W1 and W2. The method provided by the invention is used for on-line measurement of the dynamic balance of the machinery in the power generation industry, can automatically eliminate measuring errors caused by zero drift, temperature excursion and common-mode interference signal, and has the advantages of high precision and low cost.
Description
Technical field
The invention belongs to power industry machinery dynamic balancing measurement field, particularly a kind of balancing measuring method of machinery.
Background technology
Various rotary bodies in the conventional machinery, because the many factors such as material or processing, so that rotary body when rotated, the centrifugal intertia force that each small particle produces on it can not be cancelled out each other, and centrifugal intertia force is applied on machinery and the basis thereof by bearing, causes vibration, produced noise, accelerate bearing wear, shortened mechanical life, can damage incidents when serious.For this reason, must carry out balance to it, make its balance accuracy grade that reaches permission, or make so the mechanical vibration amplitude that produces is fallen in allowed limits.
In the prior art, the measurement that is easy in all sorts of ways of the parameters of stationary body, but the measuring method when moving for rotary body is not very desirable, therefore sensor must be installed on the parts of measured motion, but sensor output has the defectives such as signal is little, noise large, temperature is floated, how sensor signal being optimized processing, is the key of dynamic balancing measurement.
Summary of the invention
It is a kind of for the dynamically balanced On-line Measuring Method of power industry machinery that order of the present invention is to provide.
The technical scheme that realizes above-mentioned purpose is: a kind of balancing measuring method of machinery, it comprises the first operational amplifier A 1, the second operational amplifier A 2, the 3rd operational amplifier A 3, eight resistance R 1-R8, two potentiometer W1 and W2.
The balancing measuring method of above-mentioned a kind of machinery, wherein: be in series with whole described potentiometer W1 between the anodal V+ of the normal phase input end of described the first operational amplifier A 1 and power supply voltage signal, and be in series with whole described potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with described resistance R 1 between inverting input and the detected voltage signal Left, be in series with described resistance R 2 between inverting input and described the first operational amplifier A 1 output terminal Lout.
The balancing measuring method of above-mentioned a kind of machinery, wherein: be in series with whole described potentiometer W1 between the anodal V+ of the normal phase input end of described the second operational amplifier A 2 and power supply voltage signal, and be in series with whole described potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with described resistance R 3 between inverting input and the detected voltage signal Right; Be in series with described resistance R 4 between inverting input and described the first operational amplifier A 1 output terminal Rout.
The balancing measuring method of above-mentioned a kind of machinery, wherein: be in series with whole described potentiometer W1 and described resistance R 8 between the anodal V+ of the normal phase input end of described the 3rd operational amplifier A 3 and power supply voltage signal, and be in series with whole described potentiometer W2 and described resistance R 8 between the negative pole V-of power supply voltage signal, and be in series with described resistance R 7 between the output terminal Rout of described the second operational amplifier A 2, be in series with described resistance R 5 between inverting input and described the first operational amplifier A 1 output terminal Lout, be in series with described resistance R 6 between inverting input and described the 3rd operational amplifier A 3 output terminal out.
The balancing measuring method of above-mentioned a kind of machinery, wherein: described the first operational amplifier A 1, described the second operational amplifier A 2, described the 3rd operational amplifier A 3 are the operational amplifiers that are positioned at three identical parameters of same integrated circuit.
The balancing measuring method of above-mentioned a kind of machinery, wherein: described resistance R 1 and R3 resistance are equal, and described resistance R 2 and R4 resistance are equal, and described resistance R 5 and R7 resistance are equal, and described resistance R 6 and R8 resistance equate.
The balancing measuring method of above-mentioned a kind of machinery, wherein: described potentiometer W1 and W2 resistance equate.
The invention has the beneficial effects as follows: be used for the dynamically balanced on-line measurement of power industry machinery, can effectively eliminate automatic elimination wiring, drift, temperature is floated and common mode interference signal causes measuring error, have advantages of that precision is high, cost is low.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
See also Fig. 1, provided a kind of balancing measuring method of machinery among the figure, it comprises the first operational amplifier A 1, the second operational amplifier A 2, the 3rd operational amplifier A 3, eight resistance R 1-R8, two potentiometer W1 and W2.
Be in series with whole potentiometer W1 between the anodal V+ of the normal phase input end of the first operational amplifier A 1 and power supply voltage signal, and be in series with whole potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with input resistance R1 between inverting input and the detected voltage signal Left; Inverting input and amplifier A
1Be in series with resistance R 2 between the output terminal Lout.
Be in series with whole potentiometer W1 between the anodal V+ of the normal phase input end of the second operational amplifier A 2 and power supply voltage signal, and be in series with whole potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with input resistance R3 between inverting input and the detected voltage signal Right; Be in series with resistance R 4 between inverting input and the amplifier A1 output terminal Rout.
The resistance of resistance R 1 and R3 is fully equal.
The resistance of resistance R 2 and R4 is fully equal.
Potentiometer W1 and W2 are identical.
The first operational amplifier A
1Output Lout be expressed as follows with formula 1:
Lout=-(R2/R1) * Left, formula 1
The second operational amplifier A
2Output Rout be expressed as follows with formula 2:
Rout=-(R4/R3) * Right, formula 2
Be in series with whole potentiometer W1 and resistance R 8 between the anodal V+ of the normal phase input end of the 3rd operational amplifier A 3 and power supply voltage signal, and be in series with whole potentiometer W2 and resistance R 8 between the negative pole V-of power supply voltage signal, and be in series with resistance R 7 between the output terminal Rout of amplifier A2, be in series with resistance R 5 between inverting input and the amplifier A1 output terminal Lout, be in series with resistance R 6 between inverting input and the amplifier A3 output terminal out.
The resistance of resistance R 5 and R7 is fully equal.
The resistance of resistance R 6 and R8 is fully equal.
The output out of the 3rd operational amplifier A 3 is expressed as follows with formula 3:
Out=(R6/R5) * (R2/R1) * (Left-Right), formula 3
Can obtain respectively two enlargement factors by formula 1 and formula 2 identical, be proportional to the signal of detected voltage.Field wiring and the common mode interference signal carried secretly in the detected signal are in-phase signal Vr, in formula 1 and formula 2, Left Vr+Left substitution, Right Vr+Right substitution, signal input reality is (Left-Right) still, has eliminated field wiring and the common mode interference signal carried secretly in the detected signal.
The first operational amplifier A 1 and described the second operational amplifier A 2 are the operational amplifiers that are positioned at two identical parameters of same integrated circuit.It is Vw that drift, the temperature that operational amplifier produces floated signal.Then formula 1 and formula 2 convert following formula 5 and formula 6 to:
Lout+Vw=-Left * R2/R1, formula 5
Rout+Vw=-Right * R4/R3, formula 6
Formula 5 and formula 6 substitution formula 3 are obtained formula 7:
Out=(R6/R5) * (R2/R1) * (Left-Right), formula 7
Formula 7 has been eliminated the error that drift, temperature are floated signal fully.
In the present embodiment, first, second, third operational amplifier A 1, A2, A3 are LM064, resistance R 1, and R3, R5, the R7 resistance is 10K, resistance R 2, R4, R6, the R8 resistance is 100K.
Principle of the present invention is: reference point Selection Center point and for 0V, utilize the characteristic that common mode inhibition is good and the differential mode amplifying power is strong of difference amplifier, and directly measure dynamically balanced disturbance, on-line sampling real time data and historical record.Real-time, stability and the accuracy of power industry machinery dynamic balancing measurement have been guaranteed.
Below embodiment has been described in detail the present invention by reference to the accompanying drawings, and those skilled in the art can make the many variations example to the present invention according to the above description.Thereby some details among the embodiment should not consist of limitation of the invention, and the scope that the present invention will define with appended claims is as protection scope of the present invention.
Claims (3)
1. the balancing measuring method of a machinery, it comprises the first operational amplifier A 1, the second operational amplifier A 2, the 3rd operational amplifier A 3, eight resistance R 1-R8, two potentiometer W1 and W2, wherein:
Described the first operational amplifier A
1Normal phase input end and the anodal V+ of power supply voltage signal between be in series with whole described potentiometer W1, and be in series with whole described potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with described resistance R 1 between inverting input and the detected voltage signal Left, inverting input and described the first operational amplifier A
1Be in series with described resistance R 2 between the output terminal Lout;
Be in series with whole described potentiometer W1 between the anodal V+ of the normal phase input end of described the second operational amplifier A 2 and power supply voltage signal, and be in series with whole described potentiometer W2 between the negative pole V-of power supply voltage signal, be in series with described resistance R 3 between inverting input and the detected voltage signal Right; Be in series with described resistance R 4 between inverting input and described the first operational amplifier A 1 output terminal Rout;
Be in series with whole described potentiometer W1 and described resistance R 8 between the anodal V+ of the normal phase input end of described the 3rd operational amplifier A 3 and power supply voltage signal, and be in series with whole described potentiometer W2 and described resistance R 8 between the negative pole V-of power supply voltage signal, and be in series with described resistance R 7 between the output terminal Rout of described the second operational amplifier A 2, be in series with described resistance R 5 between inverting input and described the first operational amplifier A 1 output terminal Lout, be in series with described resistance R 6 between inverting input and described the 3rd operational amplifier A 3 output terminal out;
Described the first operational amplifier A 1, described the second operational amplifier A 2, described the 3rd operational amplifier A 3 are the operational amplifiers that are positioned at three identical parameters of same integrated circuit.
2. the balancing measuring method of a kind of machinery according to claim 1 is characterized in that: described R1 and R3 resistance equate, described R2 and R4 resistance equate, described R5 and R7 resistance equate, described R6 and R8 resistance equate.
3. the balancing measuring method of a kind of machinery according to claim 1 is characterized in that: described potentiometer W1 and W2 resistance equate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104736551A CN102928160A (en) | 2012-11-21 | 2012-11-21 | Method for measuring dynamic balance of machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104736551A CN102928160A (en) | 2012-11-21 | 2012-11-21 | Method for measuring dynamic balance of machinery |
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| CN102928160A true CN102928160A (en) | 2013-02-13 |
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| CN2012104736551A Pending CN102928160A (en) | 2012-11-21 | 2012-11-21 | Method for measuring dynamic balance of machinery |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084212U (en) * | 1991-04-09 | 1991-09-04 | 重庆人民广播电台 | Dynamic balance switch type DC voltage-stabilized source |
| US5612488A (en) * | 1994-12-26 | 1997-03-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor acceleration detecting device |
| US5854421A (en) * | 1996-05-28 | 1998-12-29 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor sensors and method for adjusting the output |
| US20060130583A1 (en) * | 2004-12-16 | 2006-06-22 | Oki Electric Industry Co., Ltd. | Output amplifier circuit and sensor device using the same |
| CN201590774U (en) * | 2009-12-10 | 2010-09-22 | 厦门科华恒盛股份有限公司 | Autobalance control device for output of inverter |
| CN102243095A (en) * | 2010-05-11 | 2011-11-16 | 上海全方电气控制工程有限公司 | Zero-drift simulation calibrating system for vibration measurement circuit |
-
2012
- 2012-11-21 CN CN2012104736551A patent/CN102928160A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084212U (en) * | 1991-04-09 | 1991-09-04 | 重庆人民广播电台 | Dynamic balance switch type DC voltage-stabilized source |
| US5612488A (en) * | 1994-12-26 | 1997-03-18 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor acceleration detecting device |
| US5854421A (en) * | 1996-05-28 | 1998-12-29 | Mitsubishi Denki Kabushiki Kaisha | Semiconductor sensors and method for adjusting the output |
| US20060130583A1 (en) * | 2004-12-16 | 2006-06-22 | Oki Electric Industry Co., Ltd. | Output amplifier circuit and sensor device using the same |
| CN201590774U (en) * | 2009-12-10 | 2010-09-22 | 厦门科华恒盛股份有限公司 | Autobalance control device for output of inverter |
| CN102243095A (en) * | 2010-05-11 | 2011-11-16 | 上海全方电气控制工程有限公司 | Zero-drift simulation calibrating system for vibration measurement circuit |
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Application publication date: 20130213 |