CN203490033U - Field dynamic balancing signal processing circuit - Google Patents
Field dynamic balancing signal processing circuit Download PDFInfo
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- CN203490033U CN203490033U CN201320384228.6U CN201320384228U CN203490033U CN 203490033 U CN203490033 U CN 203490033U CN 201320384228 U CN201320384228 U CN 201320384228U CN 203490033 U CN203490033 U CN 203490033U
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- signal
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- vibration acceleration
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Abstract
The utility model discloses a field dynamic balancing signal processing circuit which comprises the following components: a piezoelectric accelerometer which is acquiring a vibration acceleration signal of a rotary machine rotor; a photoelectric digital rotating speed meter which is used for acquiring a rotating speed pulse signal. After an electric charge amplifier performs amplification and band-pass filtering on a vibrating acceleration signal, the processed vibrating acceleration signal is transmitted to two analog amplifiers. A rotating speed pulse signal performs coupling and shaping through a coupling shaping circuit, and is then transmitted to a sine generator and a cosine generator respectively after frequency doubling and frequency dividing for generating a sine signal and a cosine signal. The sine signal and a vibrating accelerating signal are multiplied in a first analog amplifier. The cosine signal and the vibrating accelerating signal are multiplied in a second analog amplifier. After AC signal filtering is performed on the two multiplied signals respectively through a tracking low-pass wave filter, two DC signals are acquired, and amplitude and phase of a vibrating acceleration signal which is caused by rotor imbalance are acquired from a strong-noise environment.
Description
Technical field
The utility model is the signal processing circuit design that rotor unbalance value detects, and is mainly the spot dynamic balance detection for typical rotary body equipment rotor.
Background technology
Commercial production rotor imbalance is the main cause that rotating machinery produces noise and breaks down, so rotor dynamic balancing is the basic problem that rotary body equipment must solve.But domestic a lot of enterprises all still adopt the transient equilibrium of rotor off-line to detect.Do like this operations such as need to taking off lid, dismounting, transportation rotor, the repair time is long, has just caused plant maintenance and maintenance in real production to bring inconvenience, reduces production efficiency.Domestic spot dynamic balance instrument market is occupied by foreign manufacturer for a long time, is therefore necessary to develop the spot dynamic balance instrument with independent intellectual property right.
Spot dynamic balance instrument is owing to being subject to the impact of rotor, bearing, foundation structure and environment thereof etc., so its crucial difficult point is the accurate extraction of rotor unbalance value signal; Based on this, in order to extract the amount of unbalance code book utility model of rotor from strong jamming, according to the vibratory response being caused by amount of unbalance, be with signal frequently, to have proposed a kind of design of the super narrow-band tracking filter circuit based on principle of correlation analysis with rotor speed.
Utility model content
For the problems referred to above, the spot dynamic balance signal processing circuit that the utility model relates to, based on principle of correlation analysis, the vibration acceleration signal frequency causing according to rotary body equipment rotor unbalance value and rotor speed signal are the features of homogenous frequency signal, using the tach signal of rotor as filtering out non-co-channel interference noise with reference to signal according to principle of correlation analysis, from very noisy, extract vibration acceleration signal.The utility model is exactly according to above-mentioned principle, and employing piezoelectric accelerometer and photoelectric digital tachometer gage obtain vibration acceleration signal and the tach signal of rotating machinery body rotor, designs the treatment circuit of spot dynamic balance signal.
The utility model to achieve these goals, can be taked following scheme:
The utility model provides a kind of spot dynamic balance signal processing circuit, from strong noise environment, extract the vibration acceleration signal that rotor unbalance causes, it is characterized in that, comprising: piezoelectric accelerometer, for obtaining the vibration acceleration signal of rotating machinery body rotor, photoelectric digital tachometer gage, for obtaining the rotational speed pulse signal of rotating machinery body rotor, charge amplifier, frequency multiplication and frequency dividing circuit, forcing function generator, cosine generator two number mode multipliers, are respectively the first digital-to-analogue multiplier and the second digital-to-analogue multiplier, and Tracking Low-Pass Filter, wherein, charge amplifier is followed vibration acceleration signal process, after amplification and bandpass filtering, vibration acceleration signal after processing is delivered in two number mode multipliers, rotational speed pulse signal is coupled and shaping through overcoupling shaping circuit, then after frequency multiplication and frequency division, send to respectively and in forcing function generator and cosine generator, produce respectively sinusoidal signal and cosine signal, and send to respectively in storer, in storer, write respectively sinusoidal signal and cosine signal, using sinusoidal signal and cosine signal as sending to respectively with reference to signal in two number mode multipliers, vibration signal for faster by sinusoidal signal and after processing multiplies each other in the first digital-to-analogue multiplier, vibration signal for faster after cosine signal and processing multiplies each other in the second digital-to-analogue multiplier, obtain two signals after multiplying each other, signal after two are multiplied each other adopts respectively after Tracking Low-Pass Filter filtering AC signal, obtain direct current signal, from strong noise environment, obtain amplitude and the phase place of the vibration acceleration signal that rotor unbalance causes.
The spot dynamic balance signal processing circuit that the utility model is related, frequency multiplication and frequency dividing circuit are 512 times of process of frequency multiplication.
In addition, charge amplifier is that piezoelectric accelerometer inside carries.
Accompanying drawing explanation
Fig. 1 is circuit system design frame chart.
Fig. 2 is the coupling shaping circuit of rotational speed pulse signal.
Fig. 3 is the mlultiplying circuit during signal is processed.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the related a kind of spot dynamic balance signal processing circuit of the utility model is done to detailed elaboration, but the utility model is not limited only to this embodiment.In order to make the public have sufficient understanding to the utility model, below preferred embodiment of the present utility model is being described in detail to concrete details.
Fig. 1 is circuit system design frame chart.
As shown in Figure 1, spot dynamic balance signal processing circuit 100 obtains rotating machinery body rotors rotational speed pulse signal by photoelectric digital tachometer gage 101 by overcoupling shaping circuit 103 be coupled, shaping, then via frequency multiplication and frequency dividing circuit, carry out delivering to after frequency multiplication, frequency division and in forcing function generator 105 and cosine generator, generate sinusoidal signal and cosine signal, the signal after processing is as with reference to signal y
1and y (t)
2(t).
By sinusoidal signal y
1(t) multiply each other in the first digital-to-analogue multiplier 108a with measured signal x (t), the result multiplying each other is delivered in Tracking Low-Pass Filter 109 and is eliminated AC signal, obtains direct current signal.By cosine signal y
2(t) and measured signal x (t) eliminate AC signal deliver to Tracking Low-Pass Filter 109 after first multiplies each other in, obtain direct current letter.
Suppose that the signal being obtained by piezoelectric accelerometer is
in formula
for the once per revolution vibration acceleration signal that rotor unbalance value causes, amplitude, ω that wherein A is vibration acceleration signal
0for the angular frequency of rotor speed,
for the summation form of non-co-channel interference noise ν (t), A, " DC component that may contain in the signal collecting for vibration acceleration, in actual design, we just suppose that this signal exists.The rotational speed pulse signal being obtained by photoelectric digital tachometer gage 101 is y (t), owing to containing two known variables amplitude A and phase place in the signal obtaining
therefore the utility model is treated to reference signal the harmonic signal (harmonic signal refers to that a physical quantity is in time by the situation of sine or cosine function relationship change) of 90 ° of two-way phase phasic differences, so reference signal y (t) can be write as y
1(t)=A
0sin ω
0t and y
2(t)=A
0cos ω
0t.According to principle of correlation analysis by y
1and y (t)
2(t) do cross correlation process with x (t) respectively, can obtain:
with
direct current shunting is contained respectively on equation the right
with
amplitude A and the phase place of the vibration acceleration being caused by rotor unbalance value in simultaneously comprising in DC component
information, remaining is AC signal.Only the AC compounent in formula need be filtered out and can obtain DC component, thus the amplitude of the vibration acceleration signal that can obtain being caused by rotor unbalance value and phase place.
Fig. 2 is the coupling shaping circuit of rotational speed pulse signal.
As shown in Figure 2, rotational speed pulse signal is sent to and in TL081, amplifies shaping after overcoupling, again the signal amplifying after shaping is carried out to the range of decrease and filtering processing, wherein C1 is coupling capacitance, D1 and R4 play range of decrease effect, D1 is the voltage stabilizing diode of 5.1V, and in order to be level match, R5 and C2 form a simple passive filtering.After again the OUT1 in figure is through pretreated square-wave signal, be sent in frequency multiplication and frequency dividing circuit.
Fig. 3 is the mlultiplying circuit during signal is processed.
As shown in Figure 3, for the vibration acceleration signal after processing respectively with the mlultiplying circuit of sinusoidal signal, cosine signal.In Fig. 3, only provide multiplying each other of sinusoidal signal in mlultiplying circuit of the present utility model and vibration acceleration signal, in figure, A is that acceleration signal P1-P8 is that sinusoidal signal is sent to OUT2 and in special-purpose Tracking Low-Pass Filter 109, obtains a DC component after digital-to-analogue multiplier TLC7524, in like manner another road cosine signal and acceleration signal also can obtain a DC component, the vibration acceleration signal that the two quadrature can be obtained being caused by imbalance and the phase place of amount of unbalance after multiplying each other.
The effect of specific embodiment and effect
The spot dynamic balance signal processing circuit that the present embodiment is related, while testing due to spot dynamic balance, signal to noise ratio (S/N ratio) is little, so specific embodiments of the present utility model is for adopting piezoelectric accelerometer and photoelectric digital tachometer gage to obtain respectively vibration acceleration signal and the tach signal of rotating machinery body rotor.Piezoelectric accelerometer adopts inner charged amplifier 104, by the vibration acceleration signal of acquisition through following, after amplification, bandpass filtering, then the signal after processing is delivered in multiplier 108; Have photoelectric figure tachometer gage to obtain rotational speed pulse signal and deliver to respectively in storer after overcoupling, shaping and 512 times of frequencys multiplication and frequency division, the rear programming that utilizes is written as respectively sine function and cosine function, i.e. sine function y
1(t)=A
0sin ω
0t and cosine function y
2(t)=A
0cos ω
0t, and then the sinusoidal signal obtaining and cosine signal are delivered to respectively in two multipliers and multiplied each other respectively at the vibration acceleration signal after processing.Signal after multiplying each other is after special-purpose Tracking Low-Pass Filter filtering AC signal, just can from strong noise environment, obtain the vibration acceleration signal that rotor unbalance value causes, can carry out spot dynamic balance test to typical rotary body equipment and the rotor of some complete machines, unit, replace the uneven detection of off-line type.
Claims (3)
1. a spot dynamic balance signal processing circuit is extracted the vibration acceleration signal that rotor unbalance causes from strong noise environment, it is characterized in that, comprising:
Piezoelectric accelerometer, for obtaining the vibration acceleration signal of described rotating machinery body rotor;
Photoelectric digital tachometer gage, for obtaining the rotational speed pulse signal of described rotating machinery body rotor;
Charge amplifier;
Frequency multiplication and frequency dividing circuit;
Forcing function generator;
Cosine generator;
Two number mode multipliers, are respectively the first digital-to-analogue multiplier and the second digital-to-analogue multiplier; And
Tracking Low-Pass Filter;
Wherein, described charge amplifier by described vibration acceleration signal through following, after amplification and bandpass filtering, the vibration acceleration signal after processing is delivered in two number mode multipliers,
Described rotational speed pulse signal is coupled and shaping through overcoupling shaping circuit, then after frequency multiplication and frequency division, send to respectively and in forcing function generator and cosine generator, produce respectively sinusoidal signal and cosine signal, and send to respectively in storer, in described storer, write respectively sinusoidal signal and cosine signal
Using described sinusoidal signal and cosine signal as sending to respectively with reference to signal in described two number mode multipliers, vibration signal for faster after described sinusoidal signal and described processing is multiplied each other in described the first digital-to-analogue multiplier, vibration signal for faster after described cosine signal and described processing multiplies each other in described the second digital-to-analogue multiplier, obtain two signals after multiplying each other
Signal after two are multiplied each other adopts respectively after Tracking Low-Pass Filter filtering AC signal, obtains two direct current signals, from strong noise environment, obtains amplitude and the phase place of the vibration acceleration signal that rotor unbalance causes.
2. spot dynamic balance signal processing circuit according to claim 1, is characterized in that:
Wherein, described frequency multiplication and frequency dividing circuit are 512 times of frequencys multiplication.
3. spot dynamic balance signal processing circuit according to claim 1, is characterized in that:
Wherein, described charge amplifier is that described piezoelectric accelerometer inside carries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320384228.6U CN203490033U (en) | 2013-06-28 | 2013-06-28 | Field dynamic balancing signal processing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320384228.6U CN203490033U (en) | 2013-06-28 | 2013-06-28 | Field dynamic balancing signal processing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203490033U true CN203490033U (en) | 2014-03-19 |
Family
ID=50260856
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|---|---|---|---|
| CN201320384228.6U Expired - Fee Related CN203490033U (en) | 2013-06-28 | 2013-06-28 | Field dynamic balancing signal processing circuit |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606304A (en) * | 2016-03-23 | 2016-05-25 | 广东顺威精密塑料股份有限公司 | Intelligent dynamic balance testing system for dynamic balancing machine |
| CN108759809A (en) * | 2018-08-10 | 2018-11-06 | 维沃移动通信有限公司 | A kind of gyroscope detection circuit and terminal |
-
2013
- 2013-06-28 CN CN201320384228.6U patent/CN203490033U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105606304A (en) * | 2016-03-23 | 2016-05-25 | 广东顺威精密塑料股份有限公司 | Intelligent dynamic balance testing system for dynamic balancing machine |
| CN108759809A (en) * | 2018-08-10 | 2018-11-06 | 维沃移动通信有限公司 | A kind of gyroscope detection circuit and terminal |
| CN108759809B (en) * | 2018-08-10 | 2020-09-01 | 维沃移动通信有限公司 | Gyroscope detection circuit and terminal |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20140628 |
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| EXPY | Termination of patent right or utility model |