CN102520631A - On-line automatic balancing controller of rotating machinery - Google Patents
On-line automatic balancing controller of rotating machinery Download PDFInfo
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- CN102520631A CN102520631A CN2011104211614A CN201110421161A CN102520631A CN 102520631 A CN102520631 A CN 102520631A CN 2011104211614 A CN2011104211614 A CN 2011104211614A CN 201110421161 A CN201110421161 A CN 201110421161A CN 102520631 A CN102520631 A CN 102520631A
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Abstract
The invention discloses an on-line automatic balancing controller of rotating machinery, belonging to the cross field of machinery and control. A DSP (Digital Signal Processor) core module is connected to a balancing executor through a multipath control signal generation module; an output signal interface of a vibration sensor is connected to a signal preprocessing module, and the output signals are input into the DSP core module after being processed by an A/D conversion module; the output signal interface of a keyphasor transducer is connected to a phase-locked loop program control frequency doubling module, and the output signals are input into the DSP core module after being treated by level switching in a level switching module; the DSP core module is further connected with an extended key liquid crystal man-machine interface circuit, an extended E2PROM module and a communication protocol conversion module. For the on-line automatic balancing controller, real-time on-line balancing control is used, and in comparison with an off-line dynamic balance control system, the controller has the advantages of debugging in time, being convenient and flexible, being small in system volume, being quick in response to control, being capable of reflecting actual rotation conditions of the tested system in real time and performing related control enforcement, and the like.
Description
Technical field
The present invention relates to the on-line automatic balance controller of a kind of rotating machinery; It implements on-line dynamic balancing according to the second-order characteristics of vibrational system and the principle of work of concrete balance actuator; Be used for the rotary main shaft system is carried out the detection and the control of on-line dynamic balancing, belong to machinery and control the field that intersects.
Background technology
In generating plant, chemical plant and other large and medium-sized industrial enterprise, rotating machinery like turbodynamo, blower fan, water pump, motor etc., all is indispensable large-scale key equipment.But these rotating machineries may cause vibration exceeding the standard because of some reason, the shutdown that causes the accident, enormous economic loss.The vibration cause of rotating machinery is diversified, like rotor unbalance vibration, oil whip, the vibration of rotor decentraction, random vibration etc.But the on-the-spot actual rotating machinery vibrating that takes place is excessive, belongs to that rotor quality is unbalanced to be accounted for about 80%, so the rotor quality imbalance is to make the vibrative main cause of rotating machinery.
The vibration exceeding the standard of rotating machinery is a key issue concerning the running at full capacity for a long time of crucial slewing.Vibration problem to rotating machinery; From existing technology; Focus mostly on aspect the research of the monitoring of vibrational state and corresponding transient equilibrium actuator; More concentrating on how to design dynamic balancing head aspect the existing patent of invention, as Birkenstack the United States Patent (USP) 3950897, Kerlin of application in 1976 United States Patent (USP) 4432253, the Zhejiang University of application in 1984 congratulate generation just waiting the people to design a kind of Automatic Balance for Rotors in calendar year 2001 to release liquid formula balance with fluid injection first-class.In the past at the common single-chip microcomputer of the many employings of the research of vibrating controller design aspect; Like 51 series or 98 Series chip, because its command function and arithmetic speed are limited, signal processing time is long; Generally be suitable for the measurement of stationary vibration signal, and be not suitable for observing and controlling the nonstationary vibration signal.And because these Series chip integrated hardware multiplier how not; Thereby the vibration signal that often vibration-measuring sensor is picked up when adopting the low side processor of single chip computer carries out conversion, digital track band pass filter, amplification, A/D conversion, the data direct judgment processing of microprocessor after according to the A/D conversion.This is a kind of method that mimic channel extracts the power frequency component component that relies on, and system's anti-jamming capacity is poor, and the performance of circuit directly influences the control effect of controller.
In order to overcome the defective that exists as stated; The purpose of this invention is to provide a kind of rotating machinery real-time online balance Control Scheme device based on DSP; It is had follows the tracks of measured signal fast; Rapid reaction, and it is strong to suppress the undesired signal ability, reaches accurate measurement and quick control rotating machinery and realizes the dynamic vibration balance.
Summary of the invention
In order to overcome the not high and untimely shortcoming of other on-line control system control reactions of existing off-line transient equilibrium control system measuring accuracy, the invention provides a kind of on-line dynamic balancing control system of utilizing the rotating machinery vibrating signal.
The present invention adopts following technical scheme:
The on-line automatic balance controller of a kind of rotating machinery, it comprises DSP nucleus module 1, key phase sensor 2; The program control frequency multiplication module 3 of phaselocked loop, level switch module 4, vibration transducer 5; Signal pre-processing module 6, A/D modular converter 7, multi-way control signals produces circuit module 8; Balance actuator 9 extends out button liquid crystal man-machine interface circuit 10, extends out E2PROM module 11; And communications protocol modular converter 12, it is characterized in that: DSP nucleus module 1 is connected to the balance actuator 9 that is used to control balance through multi-way control signals generation module 8; The output signaling interface that is used to pick up the vibration transducer 5 of measuring point original vibration signal on the rotating machinery is connected to signal pre-processing module 6, carries out inputing to the DSP nucleus module after the analog to digital conversion through A/D modular converter 7 again; The output signaling interface of key phase sensor 2 that is used to pick up the tach signal of main shaft is connected to the program control frequency multiplication module 3 of phaselocked loop, is that the level switch module 4 of the required univoltage signal of A/D converter carries out inputing to the DSP nucleus module after the level conversion through being used for the bi-directional voltage signal transition again; DSP nucleus module 1 also is connected with the E that extends out that is used for the extending out button liquid crystal man-machine interface circuit 10, be used for the parameter dynamic memory of artificial input parameter, replacement and recovery
2PROM module 11, be used for the communications protocol modular converter 12 that communicates with host computer.
Described A/D modular converter 7 is built in dsp chip inside with DSP nucleus module 1.
The program control frequency multiplication module 3 of described phaselocked loop adopts the CD4046 chip as acp chip.
12 of described communications protocol moduluss of conversion are RS-232 communication with the RS-485 transition of communications.
The present invention and conventional online transient equilibrium control system relatively have following advantage:
(1) the present invention adopts the high-performance digital signal processor DSP that is suitable for the control aspect as core processor, and its control accuracy is high, and integrated level is high, and fast operation has two task managers, can realize the control to multichannel balance actuator;
(2) the present invention adopts real-time online transient equilibrium control, compares with off-line transient equilibrium control system, has debugging in time; Convenient, flexible; System bulk is little, and control reaction is fast, the advantages such as line correlation control enforcement of can real time reaction institute examining system actual rotation situation going forward side by side;
(3) to have adopted CD4046 be the frequency multiplication of phase locked loop link of core in the present invention, measures the speed of mainshaft of rotating machinery based on the frequency measurement and cycle measurement mixing method, not only can obtain very accurately tachometer value, can also further enlarge the working speed scope that controller is suitable for;
(4) adopt the RS-485 communications protocol to carry out the signal transmission, both can realize the local networking of on-the-spot end, can realize Long-distance Control again opertaing device;
(5) utilization E2PRAM module can realize the dynamic memory of key parameter and the recovery that key parameter is restarted in non-normal condition shutdown back system, has improved the reliability of control system;
(6) button and LCD human-machine interface module show measuring-signal in real time, make things convenient for the setting and the adjustment of controlled variable, improve control efficiency;
Description of drawings
Fig. 1 is a structure composition frame chart of the present invention
Fig. 2 is a control principle block diagram of the present invention
Fig. 3 is A/D conversion interface circuit figure of the present invention
Fig. 4 is I2C bus of the present invention and E2PROM interface circuit figure
Fig. 5 is that RS-232 of the present invention changes RS485 chip circuit figure
Fig. 6 is the liquid crystal display drive circuit of 128*64 of the present invention
Fig. 7 is the key signal modulate circuit figure based on phaselocked loop of the present invention
Fig. 8 is DSP core circuit figure of the present invention
Among the figure: 1, DSP nucleus module, 2, key phase sensor, 3, the program control frequency multiplication module of phaselocked loop; 4, level switch module, 5, vibration transducer, 6, signal pre-processing module; 7, A/D modular converter, 8, multi-way control signals produces circuit module, 9, the balance actuator; 10, extend out button liquid crystal man-machine interface circuit, 11, extend out the E2PROM module, 12, the communications protocol modular converter.
Embodiment
As shown in Figure 1, hardware module of the present invention is mainly by DSP nucleus module 1, key phase sensor, 2; The program control frequency multiplication module 3 of phaselocked loop, level switch module 4, vibration transducer 5, signal pre-processing module 6; A/D modular converter 7, multi-way control signals produces circuit module 8, balance actuator 9; Extend out button liquid crystal man-machine interface circuit 10, extend out E2PROM module 11, and communications protocol modular converter 12 is formed.
The vibration transducer of this control system picks up the original vibration signal of the corresponding measuring point of rotating machinery; This signal is the required univoltage signal of A/D converter by voltage translation circuit in the signal pre-processing module with the bi-directional voltage signal transition behind signal pre-processing module and anti-aliasing filter.DSP includes 12 A/D converters.Key phase sensor picks up the tach signal of main shaft, after the Schmidt trigger shaping, send CD4046 phase-locked loop module, and phase-locked loop module can programmed control be realized double frequency function in the 1-100.Employing frequency multiplication of phase locked loop technology just can than being easier to measure rotating speed, can further enlarge the suitable range of speeds of total system under the slow-speed of revolution (like 0.X HZ, even more under the low frequency) and the existing singly-bound condition that groove tests the speed mutually.Rotational speed pulse signal after frequency multiplication send dsp processor to measure the tachometer value of main shaft, promptly current power frequency value by the frequency measurement and cycle measurement mixing method.Produce the control signal that triggering A/D module is changed based on this power frequency value by certain rule treatments, realize integer-period sampled processing vibration signal.The event manager module of dsp processor produces the signal of multichannel control balance actuator, after photoisolator is isolated, send corresponding balance actuator to carry out control action.E2PRAM module: in system work process; Can run into various improper operating modes unavoidably; Cause the sudden power of system, when this thing happens, if system can be according to real-time vibration situation after restarting; Recover the key parameter before the outage selectively, can make undoubtedly duty before our control system can reach outage apace (based on prerequisite be that system all is gradual hypothesis).The E2PRAM module is used to realize the dynamic memory and the replacement of key parameter, and the system that the parameter of this module stores both can be used under the improper operating mode restarts, and the parameter before can realizing again cutting off the power supply is preserved and the recovery of start back key parameter again.Sort run when dsp processor is accomplished complete machine, the various controls such as signal output, man-machine conversation and The measured results show of the seizure of the sampling analysis processing of measured signal, the pulse of key phase, control balance actuator.The RS485RS232C module both can have been accomplished the local networking of each measuring point, can realize the remote data communication (this distance can reach and be placed on workshop level control center to control system, and implementation controller is placed on on-the-spot current demand) with control center again.Corresponding balance actuator carries out mass compensation by its principle of work under the control of control signal, make total system reach mobile equilibrium.
Fig. 2 has provided control principle of the present invention.On the main shaft of rotating machinery or rotor, offer key phase groove, this place is the reference position.Key phase sensor produces a reference pulse signal (this pulse signal is called key signal again) when main shaft or rotor turn over the reference position; This pulse signal is double frequency pulse signal of frequency multiplication of phase locked loop module generation of core through CD4046; Behind level switch module, send the DSP nucleus module; Measure the real-time tachometer value of main shaft according to the frequency measurement and cycle measurement mixing method, utilize this real-time tachometer value to produce the start pulse signal of control A/D conversion by certain rule.Under the control of trigger pulse, the vibration signal of A/D modular converter after to Signal Pretreatment carries out complete cycle and gathers.After Fast Fourier Transform (FFT) (FFT), obtain the amplitude and the phase place of power frequency vibration signal by the DSP nucleus module through digitized vibration values after the A/D conversion.Under the prerequisite of knowing the power frequency vibration signal, provide the control signal of controlling the balance actuator by the DSP nucleus module by certain rule according to the characteristic of vibration second-order system and the principle of work of concrete balance actuator.Under the effect of control signal, the balance actuator carries out mass compensation according to its principle of work to total system, till the system vibration index reaches requirement.
As shown in Figure 3, A/D conversion interface circuit of the present invention carries out step-down and voltage follow processing with the voltage input value that need carry out the A/D conversion, and the restriction input voltage is big or small, satisfies the voltage request of A/D module.
As shown in Figure 4, E2PROM module of the present invention links to each other with the DSP nucleus module, realizes dynamic memory and replacement to key parameter, and the parameter before the outage is preserved and the recovery of start back key parameter again.
As shown in Figure 5, communications protocol modular converter of the present invention converts RS-232C into the RS-485 bus protocol through the MAX3160 chip, improves signal transmission distance, can realize Long-distance Control, strengthens the dirigibility of control.
As shown in Figure 6,128*64 liquid crystal interface driving circuit of the present invention links to each other with the DSP nucleus module, shows measuring-signal in real time, makes things convenient for the setting and the adjustment of controlled variable, improves control efficiency.
As shown in Figure 7, provided the program control frequency multiplier circuit module principle of phaselocked loop figure.Through the CD4046 phase-locked loop chip key phase pulse signal is advanced horizontal lock, the signal of lock after mutually carries out frequency multiplication through the CD4059 chip, improves the accuracy and the precision of the rotating signal of rotating shaft.Through the high-low level of setting chip relevant pins, realize programmed control to the frequency multiplication multiple.
As shown in Figure 8, provide DSP nucleus module circuit diagram, dsp processor peripheral circuit wiring design realizes DSP minimum system function.
Claims (6)
1. on-line automatic balance controller of rotating machinery, it comprises DSP nucleus module (1), key phase sensor (2); The program control frequency multiplication module of phaselocked loop (3), level switch module (4), vibration transducer (5); Signal pre-processing module (6), A/D modular converter (7), multi-way control signals produces circuit module (8); Balance actuator (9) extends out button liquid crystal man-machine interface circuit (10), extends out E2PROM module (11); And communications protocol modular converter (12), it is characterized in that: DSP nucleus module (1) is connected to the balance actuator (9) that is used to control balance through multi-way control signals generation module (8); The output signaling interface that is used to pick up the vibration transducer (5) of measuring point original vibration signal on the rotating machinery is connected to signal pre-processing module (6), passes through A/D modular converter (7) again and carries out inputing to the DSP nucleus module after the analog to digital conversion; The output signaling interface of key phase sensor (2) that is used to pick up the tach signal of main shaft is connected to the program control frequency multiplication module of phaselocked loop (3), is that the level switch module (4) of the required univoltage signal of A/D converter carries out inputing to the DSP nucleus module after the level conversion through being used for the bi-directional voltage signal transition again; DSP nucleus module (1) also be connected be used for artificial input parameter extend out button liquid crystal man-machine interface circuit (10), be used for the E that extends out of parameter dynamic memory, replacement and recovery
2PROM module (11) is used for the communications protocol modular converter (12) that communicates with host computer.
2. the on-line automatic balance controller of rotating machinery according to claim 1 is characterized in that: described A/D modular converter (7) and DSP nucleus module (1) are built in dsp chip inside.
3. the on-line automatic balance controller of rotating machinery according to claim 1 is characterized in that: the program control frequency multiplication module of described phaselocked loop (3) adopts the CD4046 chip as acp chip.
4. the on-line automatic balance controller of rotating machinery according to claim 1 is characterized in that: described communications protocol modular converter (12) is RS-232 communication with the RS-485 transition of communications.
5. the on-line automatic balance controller of rotating machinery according to claim 1 is characterized in that: described vibration transducer (5) is displacement transducer and/or speed pickup and/or acceleration transducer sensor.
6. the on-line automatic balance controller of rotating machinery according to claim 1 is characterized in that: described balance actuator (9) is the liquid on-line automatic balance head in three chambeies or four chambeies, or the first-class balance actuator of electromagnetic balance.
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| CN2011104211614A CN102520631A (en) | 2011-12-15 | 2011-12-15 | On-line automatic balancing controller of rotating machinery |
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Cited By (7)
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| CN102914408A (en) * | 2012-11-08 | 2013-02-06 | 昆山北极光电子科技有限公司 | Dynamic balance test method for rotating machinery |
| CN103727975A (en) * | 2012-10-11 | 2014-04-16 | 成都赛腾自动化工程有限公司 | Rotating machine on-line monitoring protection device with real-time data transmission function |
| CN104180895A (en) * | 2013-05-24 | 2014-12-03 | 安徽容知日新信息技术有限公司 | Synchronous acquisition apparatus of vibration signal of rotary machine and vibration signal acquisition method |
| CN105806474A (en) * | 2016-06-01 | 2016-07-27 | 上海辛克试验机有限公司 | Method for measuring vibration of rotating machinery |
| CN108005961A (en) * | 2017-10-31 | 2018-05-08 | 沈阳透平机械股份有限公司 | There is the centrifugal compressor of rotor on-line dynamic balancing |
| CN109374210A (en) * | 2018-10-11 | 2019-02-22 | 九江精密测试技术研究所 | A kind of dynamic balancing measurement circuit |
| CN112987613A (en) * | 2021-02-24 | 2021-06-18 | 深圳中广核工程设计有限公司 | Distributed rotating machinery state online monitoring and fault analysis system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727975A (en) * | 2012-10-11 | 2014-04-16 | 成都赛腾自动化工程有限公司 | Rotating machine on-line monitoring protection device with real-time data transmission function |
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| CN104180895A (en) * | 2013-05-24 | 2014-12-03 | 安徽容知日新信息技术有限公司 | Synchronous acquisition apparatus of vibration signal of rotary machine and vibration signal acquisition method |
| CN104180895B (en) * | 2013-05-24 | 2017-03-22 | 安徽容知日新科技股份有限公司 | Synchronous acquisition apparatus of vibration signal of rotary machine and vibration signal acquisition method |
| CN105806474A (en) * | 2016-06-01 | 2016-07-27 | 上海辛克试验机有限公司 | Method for measuring vibration of rotating machinery |
| CN105806474B (en) * | 2016-06-01 | 2019-02-15 | 国网上海市电力公司 | A kind of rotating machinery vibrating measurement method |
| CN108005961A (en) * | 2017-10-31 | 2018-05-08 | 沈阳透平机械股份有限公司 | There is the centrifugal compressor of rotor on-line dynamic balancing |
| CN109374210A (en) * | 2018-10-11 | 2019-02-22 | 九江精密测试技术研究所 | A kind of dynamic balancing measurement circuit |
| CN112987613A (en) * | 2021-02-24 | 2021-06-18 | 深圳中广核工程设计有限公司 | Distributed rotating machinery state online monitoring and fault analysis system |
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Application publication date: 20120627 |