CN102927998A - Multi-channel vibration noise filtering method - Google Patents
Multi-channel vibration noise filtering method Download PDFInfo
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- CN102927998A CN102927998A CN2012104742251A CN201210474225A CN102927998A CN 102927998 A CN102927998 A CN 102927998A CN 2012104742251 A CN2012104742251 A CN 2012104742251A CN 201210474225 A CN201210474225 A CN 201210474225A CN 102927998 A CN102927998 A CN 102927998A
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- operational amplifier
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- vibration noise
- filtering method
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Abstract
The invention discloses a multi-channel vibration noise filtering method, which comprises a first operational amplifier A1, a second operational amplifier A1, a third operational amplifier A3, an input resistor R1, an input resistor R3, an input resistor R5, a feedback resistor R2, a feedback resistor R4 and a feedback resistor R6. The multi-channel vibration noise filtering method provided by the invention is used for filtering the mechanical vibration noise in the power industry, and the method can automatically eliminate a measuring error caused by a common-mode noise signal, and the method has advantages of high precision, good stability and low cost.
Description
Technical field
The invention belongs to power industry mechanical vibration noise filtering field, particularly hyperchannel vibration noise filtering method.
Background technology
The vibration that produces during plant equipment work all exerts an influence to the on-line measurement of its parameters, for can be when plant equipment be worked the parameters of collection machinery accurately and stably, need to eliminate the interference of vibration noise, how the filtering common mode vibration noise is the key of parameter acquisition accuracy.
Summary of the invention
Order of the present invention is to provide a kind of hyperchannel filtering method for the power industry mechanical vibration noise.
The technical scheme that realizes above-mentioned purpose is: a kind of hyperchannel vibration noise filtering method, a kind of balancing measuring method of machinery, it comprises the first operational amplifier A 1, the second operational amplifier A 1, the 3rd operational amplifier A 3, input resistance R1, input resistance R3, input resistance R5, feedback resistance R2, feedback resistance R4 and feedback resistance R6.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: the positive input end grounding of described the first operational amplifier A 1, be in series with described input resistance R1 between inverting input and the detected voltage signal Vin, be in series with described feedback resistance R2 between inverting input and described the first operational amplifier A 1 output terminal 1out.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: the positive input end grounding of described the second operational amplifier A 1, be in series with described input resistance R3 between inverting input and described the first operational amplifier A 1 output terminal 1out, be in series with described feedback resistance R4 between inverting input and described the second operational amplifier A 1 output terminal 2out.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: the positive input end grounding of described the 3rd operational amplifier A 3, be in series with described input resistance R5 between inverting input and the detected voltage signal Vin, be in series with described feedback resistance R6 between inverting input and described the 3rd operational amplifier A 3 output terminal 3out.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: described the first operational amplifier A 1, described the second operational amplifier A 1, described the 3rd operational amplifier A 3 are the operational amplifiers that are positioned at three identical parameters of same integrated circuit.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: described resistance has following relation: R1=R2, R4=2*R3, R6=3*R5.
Above-mentioned a kind of hyperchannel vibration noise filtering method, wherein: through the filtering of noise, the gain multiple of signal improves, and common-mode noise is inhibited.
The invention has the beneficial effects as follows: be used for the filtering of power industry mechanical vibration noise, can automatically eliminate the measuring error that common mode noise signal causes, have precision height, good stability, advantage that 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 hyperchannel vibration noise filtering method among the figure, it comprises the first operational amplifier A 1, the second operational amplifier A 1, the 3rd operational amplifier A 3, input resistance R1, input resistance R3, input resistance R5, feedback resistance R2, feedback resistance R4 and feedback resistance R6.
The positive input end grounding of the first operational amplifier A 1 is in series with input resistance R1 between inverting input and the detected voltage signal Vin, is in series with feedback resistance R2 between inverting input and the first operational amplifier A 1 output terminal 1out.
The positive input end grounding of the second operational amplifier A 1 is in series with input resistance R3 between inverting input and the first operational amplifier A 1 output terminal 1out, is in series with feedback resistance R4 between inverting input and the second operational amplifier A 1 output terminal 2out.
The input resistance R5 that connects between the positive input end grounding of the 3rd operational amplifier A 3, inverting input and detected voltage signal Vin is in series with feedback resistance R6 between inverting input and the 3rd operational amplifier A 3 output terminal 3out.
The first operational amplifier A 1, the second operational amplifier A 1, the 3rd operational amplifier A 3 are the operational amplifiers that are positioned at three identical parameters of same integrated circuit.
Among the present invention, R1=R2, R4=2*R3, R6=3*R5 supposes that the common mode vibration noise is Vz.
The first operational amplifier A 1 is output as:
1out=-Vin+Vz formula 1
The second operational amplifier A 1 is output as:
2out=2*Vin+Vz formula 2
The 3rd operational amplifier A 3 is output as:
3out=-3*Vin+3*Vz formula 3
3 passages are according to 2out-(3out-1out) mode superpose, the result is 4Vin, showing signal stack after gain improve 4 times, and common-mode noise is inhibited.
In the present embodiment, first, second, third operational amplifier A 1, A1, A3 are LM064, and resistance R 1, R2, R3, R5 resistance are 10K, and resistance R 4 resistances are 20K, and resistance R 6 resistances are 30K.
Principle of the present invention is: utilizes the multichannel differential mode of signal to amplify and improves gain, and uncertain in view of the phase place of common-mode noise, suppress noise by the multi channel signals stack, guaranteed stability and the accuracy of power industry vibration noise filtering.
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 (4)
1. hyperchannel vibration noise filtering method, it comprises the first operational amplifier A 1, the second operational amplifier A 1, the 3rd operational amplifier A 3, input resistance R1, input resistance R3, input resistance R5, feedback resistance R2, feedback resistance R4 and feedback resistance R6, wherein:
The positive input end grounding of described the first operational amplifier A 1, be in series with described input resistance R1 between inverting input and the detected voltage signal Vin, be in series with described feedback resistance R2 between inverting input and described the first operational amplifier A 1 output terminal 1out;
The positive input end grounding of described the second operational amplifier A 1, be in series with described input resistance R3 between inverting input and described the first operational amplifier A 1 output terminal 1out, be in series with described feedback resistance R4 between inverting input and described the second operational amplifier A 1 output terminal 2out;
The positive input end grounding of described the 3rd operational amplifier A 3, be in series with described input resistance R5 between inverting input and the detected voltage signal Vin, be in series with described feedback resistance R6 between inverting input and described the 3rd operational amplifier A 3 output terminal 3out.
2. described a kind of hyperchannel vibration noise filtering method according to claim 1, it is characterized in that described the first operational amplifier A 1, described the second operational amplifier A 1, described the 3rd operational amplifier A 3 are the operational amplifiers that are positioned at three identical parameters of same integrated circuit.
3. described a kind of hyperchannel vibration noise filtering method according to claim 1 is characterized in that described resistance has following relation: R1=R2, R4=2*R3, R6=3*R5.
4. described a kind of hyperchannel vibration noise filtering method according to claim 1 is characterized in that, through the filtering of noise, the gain multiple of signal improves, and common-mode noise is inhibited.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104742251A CN102927998A (en) | 2012-11-21 | 2012-11-21 | Multi-channel vibration noise filtering method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104742251A CN102927998A (en) | 2012-11-21 | 2012-11-21 | Multi-channel vibration noise filtering method |
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| CN102927998A true CN102927998A (en) | 2013-02-13 |
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| CN2012104742251A Pending CN102927998A (en) | 2012-11-21 | 2012-11-21 | Multi-channel vibration noise filtering method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023565A (en) * | 1974-06-21 | 1977-05-17 | Siemens Aktiengesellschaft | Circuit arrangement for the processing of physiological measuring signals |
| US4563652A (en) * | 1985-04-12 | 1986-01-07 | Audio Precision, Inc. | Dual-stage filter with feedback |
| US5376899A (en) * | 1994-02-04 | 1994-12-27 | Pass Laboratories, Inc. | Amplifier with gain stages coupled for differential error correction |
| US20010011927A1 (en) * | 2000-02-04 | 2001-08-09 | Masao Noro | Electronic volume circuit |
| JP2002534884A (en) * | 1999-01-04 | 2002-10-15 | トリパス テクノロジー インコーポレイテッド | Noise reduction mechanism for operational amplifier |
| US20040061553A1 (en) * | 2002-10-01 | 2004-04-01 | Koji Suzuki | Signal amplifier |
| CN101373954A (en) * | 2007-08-24 | 2009-02-25 | 锐迪科微电子（上海）有限公司 | Method for amplifying voltage signal and operational amplifier |
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2012
- 2012-11-21 CN CN2012104742251A patent/CN102927998A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4023565A (en) * | 1974-06-21 | 1977-05-17 | Siemens Aktiengesellschaft | Circuit arrangement for the processing of physiological measuring signals |
| US4563652A (en) * | 1985-04-12 | 1986-01-07 | Audio Precision, Inc. | Dual-stage filter with feedback |
| US5376899A (en) * | 1994-02-04 | 1994-12-27 | Pass Laboratories, Inc. | Amplifier with gain stages coupled for differential error correction |
| JP2002534884A (en) * | 1999-01-04 | 2002-10-15 | トリパス テクノロジー インコーポレイテッド | Noise reduction mechanism for operational amplifier |
| US20010011927A1 (en) * | 2000-02-04 | 2001-08-09 | Masao Noro | Electronic volume circuit |
| US20040061553A1 (en) * | 2002-10-01 | 2004-04-01 | Koji Suzuki | Signal amplifier |
| CN101373954A (en) * | 2007-08-24 | 2009-02-25 | 锐迪科微电子（上海）有限公司 | Method for amplifying voltage signal and operational amplifier |
Non-Patent Citations (3)
| Title |
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| GLEN BRISEBOIS 等: "对噪声增益作斩波以实时测量运放失调电压", 《电子设计技术》 * |
| WALT JUNG等: "《运算放大器应用技术手册》", 31 January 2009, 人民邮电出版社 * |
| 张文仲 等: "《运算放大器与线性集成电路》", 31 December 1980, 湖南科学技术出版社 * |
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Application publication date: 20130213 |