CN109236684A - A kind of pump cavitation state monitoring apparatus and method - Google Patents
A kind of pump cavitation state monitoring apparatus and method Download PDFInfo
- Publication number
- CN109236684A CN109236684A CN201811178923.0A CN201811178923A CN109236684A CN 109236684 A CN109236684 A CN 109236684A CN 201811178923 A CN201811178923 A CN 201811178923A CN 109236684 A CN109236684 A CN 109236684A
- Authority
- CN
- China
- Prior art keywords
- signal
- cavitation
- cavitation state
- pump
- water pump
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing And Monitoring For Control Systems (AREA)
Abstract
Disclosed herein is a kind of pump cavitation state monitoring apparatus and methods, belong to fluid machinery Internet of Things Intelligent Diagnosis Technology field, which includes parallel water pump platform and lantern ring type communication device；This method carries noise signal to exit of pump liquid by field monitoring platform and is monitored；It is proposed that opposite noise coefficient carries noise signal to liquid and denoises；Wavelet decomposition is carried out to the frequency-region signal after denoising；WAVELET PACKET DECOMPOSITION is carried out to the time-domain signal after denoising；It is extracted the characteristic value and threshold value of cavitation state, to obtain cavitation state judging result and spot database is written；Each spot database is set into address information and shares to network；It is written and read by long-range monitoring platform by IP address, the user information stored in the management server of cloud.This patent realizes the functions such as real-time monitoring, alarm, record, the judgement of cavitation state, the data base administration of water pump, to the service life for extending water pump, reduces maintenance cost and security risk suffers from important meaning.
Description
Technical field
The invention belongs to fluid machinery Internet of Things Intelligent Diagnosis Technology field, refer in particular to be related to a kind of pump cavitation status monitoring
Device and method.
Background technique
Water pump is widely used in the key equipment in the every field and numerous industrial production systems of national economy, and one
Denier breaks down, and gently then influences to produce, heavy then equipment downtime, process is caused to interrupt, and leads to serious economic loss, or even can prestige
Life security is coerced, and cavitation is then that water pump is easiest to one of failure occurred.It is broken that cavitation will cause performance of over current component of water pump
It is bad, influence pump operation stability；Hydraulic performance decline, influences the way；Vibration noise is generated, to human body and spiritual shape
State causes damages.
Summary of the invention
To solve the above problems, the present invention provides a kind of pump cavitation state monitoring apparatus and method, the device pass through benefit
Signal is acquired with sensor and digital signal is converted electrical signals to pass to application apparatus by capture card, is realized remote
The pump cavitation status monitoring at the end journey PC and cell phone client, it is easy to use and reliable, human cost is saved, to the modernization of pump enterprise
Horizontal and pump networking technology development also functions to certain facilitation, while increasing the universality and flexibility of system, subtracts
Small equipment volume and installation environment requirement, reduce equipment cost.
To achieve the above objectives, it adopts the following technical scheme that
A kind of pump cavitation state monitoring apparatus, including signal pickup assembly, signal transmitting apparatus and application apparatus；It is described
Signal pickup assembly is arranged on water pump, the lantern ring type communication device collected signal being transferred in signal transmitting apparatus；
The lantern ring type communication device transfers data to application apparatus.
Further, the signal pickup assembly includes the inlet pressure sensor being mounted on unit fixed on water pump suction pipeline and peace
Outlet pressure sensor, hydrophone and flowmeter on export pipeline.
Further, the signal transmitting apparatus includes lantern ring type communication device；The lantern ring type communication device includes adopting
Truck；The input terminal of the capture card is connected with the signal wire of inlet pressure sensor, outlet pressure sensor, hydrophone,
For acquiring the current signal of sensor and being converted into digital signal.
Further, the application apparatus includes at the scene for being used to supervise in the field monitoring platform of monitoring, Master Control Room
The long-range monitoring platform and cell phone client surveyed.
Further, the lantern ring type communication device further includes combined aural and visual alarm, cover board, relay switch, power supply supply
Device, capture card, shell, top base and bottom base；The top base and bottom base are used to lantern ring type communication device being fixed on water
On the export pipeline of pump；The shell is connected by screw with top base；The relay switch, power supply unit, capture card
It is mounted in shell；The combined aural and visual alarm installation is on the cover board；The output of the relay switch input terminal and capture card
Terminal is connected, and relay switch output terminal is connected with combined aural and visual alarm, issues alarm for controlling it.
A kind of pump cavitation state monitoring method, comprises the following steps that
Step 1) pass through the placement sensor acquisition initial current signal on water pump；
Step 2) by capture card by step 1) in collected initial current signal be converted into digital signal；
Step 3) by by TCP communications protocol by step 2) in digital data transmission to field monitoring platform；
Step 4) using LabVIEW as software platform, write host computer procedure, receiving step three) transmit number believe
Number and pre-processed；
Step 5) realized using MATLAB programming to step 4) in pretreated data carry out wavelet threshold denoising；It adopts
With
Wavelet analysis extracts cavitation and characteristic signal occurs and carries out cavitation state judgement；
Step 6) using LabVIEW write human-computer interaction interface；MATLAB Script node mode is passed through by LabVIEW
Realize to step 4) in pretreated data and step 5) in MATLAB cavitation state judge the calling of algorithm routine, general
Cavitation state judging result real-time display is on software interface；
Step 7) using LabVIEW write host computer procedure, by step 4) in pretreated data and step 5)
In cavitation state judging result scene Access database is written in real time and generates Execl report；
Step 8) field monitoring platform is connected to internet by 4G plug-in card/optical fiber, step 7) in scene
Access Database vendors are arranged to fixed IP address to network；Database IP address and user are carried out by cloud server
Information password storage；Long-range monitoring platform and cell phone client pass through user information password and IP address reading field monitoring platform
Pretreated data and cavitation state judging result in upper scene Access database.
The advantages and positive effects of the present invention are:
1. water pump on-line monitoring, overload alarm, cavitation condition diagnosing, data base administration are integrated, pump equipment is improved
Management automation is horizontal, reduces maintenance cost and security risk.
2. substantially reducing equipment volume using lantern ring type communication device convenient for carrying out location and installation directly on pipeline
With installation environment requirement, the universality and flexibility of system are increased.
3. using virtual instrument technology, a large amount of secondary meters are saved, equipment cost is reduced.
4. being advanced by vapour using traditional lift decline and newly-increased wavelet transformation, wavelet package transforms cavitation state judging method
State determining time is lost, judgement precision is improved, is conducive to maintenance of equipment maintenance, extends the service life of water pump.
5. being managed as a whole using database, the occupancy of memory space is reduced, data read-write efficiency is accelerated, has standardized number
According to type, a large amount of engineer application data are provided for the development of water pump industry.
6. the pump cavitation status monitoring of the long-range end PC and cell phone client is realized, it is easy to use and reliable, save people
Power cost also functions to certain facilitation to the technology development of pump enterprise's modernization level and pump networking.
Detailed description of the invention
Fig. 1 is parallel water pump platform schematic diagram；
Fig. 2 is lantern ring type communication device disassembly diagram；
Fig. 3 is pump cavitation state monitoring method integrated stand composition；
Fig. 4 is that pump cavitation state judges algorithm flow chart；
Fig. 5 is filtering front and back comparison diagram；
Fig. 6 is that the high frequency coefficient of 6 layers of wavelet decomposition and low frequency coefficient extract figure；
Fig. 7 is the grayscale image of coefficient after WAVELET PACKET DECOMPOSITION.
Description of symbols:
1- test pump, 2- outlet pressure sensor, 3- hydrophone, 4- lantern ring type communication device, 4-1- combined aural and visual alarm, 4-
2- cover board, 4-3- relay switch, 4-4- power supply unit, 4-5- capture card, 4-6- shell, 4-7- top base, base under 4-8-
Seat, 5- threephase asynchronous machine, 6- cell phone client, the long-range monitoring platform of 7-, 8- export gate valve, 9- flowmeter, 10- field monitoring
Platform, 11- water tank, 12- inlet pressure sensor, 13- import gate valve.
Specific embodiment
Present invention will be further explained with reference to the attached drawings and specific examples, but protection scope of the present invention is simultaneously
It is without being limited thereto.
A kind of pump cavitation state monitoring apparatus, including signal pickup assembly, signal transmitting apparatus and application apparatus；It is described
Signal pickup assembly is arranged on water pump, the lantern ring type communication device collected signal being transferred in signal transmitting apparatus；
The lantern ring type communication device transfers data to application apparatus.The signal pickup assembly includes being mounted on unit fixed on water pump suction pipeline
On inlet pressure sensor 12 and the outlet pressure sensor 2, hydrophone 3 and the flowmeter 9 that are mounted on export pipeline.It is described
Signal transmitting apparatus includes lantern ring type communication device；The lantern ring type communication device includes capture card 4-5；The capture card 4-5
Input terminal be connected with the signal wire of inlet pressure sensor 12, outlet pressure sensor 2, hydrophone 3, for acquire sensing
The current signal of device is simultaneously converted into digital signal.By water pump on-line monitoring, overload alarm, cavitation condition diagnosing, database
Management is integrated, and is improved pump equipment management automation level, is reduced maintenance cost and security risk.It is communicated using lantern ring type
Device reduces equipment volume and installation environment requirement, reduces equipment cost, increases the universality and flexibility of system.
Import gate valve 13 is installed on the inlet pipeline and outlet conduit of water pump and exports gate valve 8 and is used to realize the water inlet of water pump and goes out
Water.
Preferably, the application apparatus includes at the scene for being used to supervise in the field monitoring platform 10 of monitoring, Master Control Room
The long-range monitoring platform and cell phone client surveyed.The lantern ring type communication device further include combined aural and visual alarm 4-1, cover board 4-2, after
Electric switch 4-3, power supply unit 4-4, capture card 4-5, shell 4-6, top base 4-7 and bottom base 4-8；The top base 4-
7 and bottom base 4-8 is used to for lantern ring type communication device being fixed on the export pipeline of water pump；The shell 4-6 by screw with
Top base 4-7 is connected；The relay switch 4-3, power supply unit 4-4, capture card 4-5 are mounted in shell 4-6；The sound
Light crossing-signal 4-1 is mounted on cover board 4-2；The output terminal phase of the relay switch 4-3 input terminal and capture card 4-5
Even, relay switch 4-3 output terminal is connected with combined aural and visual alarm 4-1, issues alarm for controlling it.
A kind of pump cavitation state monitoring method, as shown in figure 3, comprising the following steps that
Step 1) pass through the placement sensor acquisition initial current signal on water pump；
Step 2) by capture card 4-5 by step 1) in collected initial current signal be converted into digital signal；
Step 3) by by TCP communications protocol by step 2) in digital data transmission to field monitoring platform 10；
Step 4) using LabVIEW as software platform, write host computer procedure, receiving step three) transmit number believe
Number and pre-processed, realize on-line monitoring and real time alarm function；
Step 5) realized using MATLAB programming to step 4) in pretreated data carry out wavelet threshold denoising；It adopts
With
Wavelet analysis extracts cavitation and characteristic signal occurs and carries out cavitation state judgement；
Step 6) using LabVIEW write human-computer interaction interface；MATLAB Script node mode is passed through by LabVIEW
Realize to step 4) in pretreated data and step 5) in MATLAB cavitation state judge the calling of algorithm routine, general
Cavitation state judging result real-time display realizes cavitation diagnostic function on software interface；
Step 7) using LabVIEW write host computer procedure, by step 4) in pretreated data and step 5)
In cavitation state judging result scene Access database is written in real time and generates Execl report；
Step 8) field monitoring platform 10 is connected to internet by 4G plug-in card/optical fiber, step 7) in scene
Access Database vendors are arranged to fixed IP address to network；Database IP address and user are carried out by cloud server
Information password storage；Long-range monitoring platform and cell phone client pass through user information password and IP address reading field monitoring platform
Pretreated data and cavitation state judging result on 10 in the Access database of scene.
Further, step 5) in propose in wavelet threshold denoising cavitation with respect to noise coefficient CRSNR concept as judgement
The index of effect is denoised using different wavelet basis functions, Decomposition order, threshold function table, cavitation is bigger with respect to noise coefficient CRSNR,
Prove that denoising effect is better；Liquid carries noise signal-to-noise ratio after the cavitation refers to actual measurement generation cavitation with respect to noise coefficient CRSNR
The ratio of noise signal signal-to-noise ratio is carried with liquid before generation cavitation；The liquid carries noise and refers to the sound that exit hydrophone measures
Signal.
The field monitoring platform 10 is connected by twisted pair with capture card 4-5, and field data is transferred to field monitoring
It is handled in the upper computer software developed in platform 10；The upper computer software function include to water pump inlet and outlet pressure,
Noise, pump head, flow, net positive suction head data/curve on-line monitoring realize the dynamic parameter setting bound of monitoring
Overload alarm, setting and record to preset parameters such as water pump type, model, number, inlet and outlet caliber, Rated motor revolving speeds,
To the high speed acquisition and pretreatment of water pump inlet and outlet noise, feature extraction and judgement to pump cavitation state, acquisition data are write
Enter Access database and generates Execl report.
Step 5) in propose that cavitation uses difference as judgement with respect to noise coefficient CRSNR concept in wavelet threshold denoising
Wavelet basis function, Decomposition order, threshold function table denoise the index of effect, and cavitation is bigger with respect to noise coefficient CRSNR, it was demonstrated that denoising
Effect is better；Liquid carries noise signal-to-noise ratio and generation vapour after the cavitation refers to actual measurement generation cavitation with respect to noise coefficient CRSNR
Liquid carries the ratio of noise signal signal-to-noise ratio before losing；The liquid carries noise and refers to the voice signal that exit hydrophone measures.
Step 5) in using wavelet analysis to actual measurement occur cavitation after liquid carry noise frequency-region signal carry out analysis and feature
It extracts；The time-domain signal for carrying noise to liquid after actual measurement generation cavitation first carries out Short Time Fourier Transform and obtains liquid after generation cavitation
Carry the frequency-region signal of noise；6 are carried out followed by the frequency-region signal that db5 wavelet basis function carries noise to liquid after the generation cavitation
Layer wavelet decomposition and wavelet reconstruction, obtain its every layer of high frequency coefficient and low frequency coefficient；With the signal averaging of the 6th layer of low frequency coefficient
Value is increased beyond 20% judgment criteria occurred as cavitation.
Step 5) in using wavelet packet analysis to actual measurement occur liquid after cavitation carry noise time-domain signal carry out analysis with it is special
Sign is extracted；The time-domain signal of noise is carried to liquid after the generation cavitation first with db6 wavelet basis function and Shannon entropy standard
Carry out 6 layers of WAVELET PACKET DECOMPOSITION and wavelet package reconstruction；Fourier transformation is carried out to coefficient at its (5,1) node and obtains its amplitude spectrum；
The average value for calculating amplitude spectrum is increased beyond 25% judgment criteria occurred as cavitation using its average value.
Step 6) in the user of human-computer interaction interface write using LabVIEW use panel；Cavitation shape is write by MATLAB
State judges algorithm routine；Realize LabVIEW to the calling of MATLAB by MATLAB Script node mode；The cavitation state
Judge that algorithm routine includes:
A. lift decrease beyond 3%；
B. liquid is carried noise frequency-region signal and is believed using the 6th layer of low frequency coefficient of 6 layers of wavelet decomposition of db5 wavelet basis function after denoising
Number average value is increased beyond 20%；
C. liquid carries noise time-domain signal and uses 6 layers of WAVELET PACKET DECOMPOSITION (5,1) node coefficient width of db6 wavelet basis function after denoising
Value spectrum average value is increased beyond 25%；
As shown in figure 4, in summary three kinds of algorithms as long as the situation in any of which algorithm occurs judge vapour
Erosion has occurred and that.
Step 8) in be provided with data server on monitoring platform 10 at the scene, be responsible for management collection in worksite and storage
Access database, and data access service is provided to cloud；It may be simultaneously present multiple data servers, each server has
Fixed IP is identified as address；There is management server beyond the clouds, the fixed ip address of the responsible each data server of management,
User information receives remote control command and issues control command to data server；Also settable each use in management server
Family is to the access limit of each field data server, to distinguish one, two, three administrator right；Long-range monitoring platform and
Cell phone client is obtained the data on corresponding field data server by user information and IP address by cloud.
Embodiment
Specific implementation water pump is a specific speed ns=25 super-low specific speed centrifugal pump, declared working condition are as follows: flow Qd=
12.5m3/ h, lift Hd=74m, revolving speed nd=2950r/min.
Build water pump assembly testing stand.The 12 model MIK-P300 of inlet pressure sensor installed on unit fixed on water pump suction pipeline；
2 model MIK-P300 of outlet pressure sensor, 3 model RHSA-10 of hydrophone, 9 model of flowmeter in exit of pump installation
LDG-MIK-DN80；For acquiring each parameter initial current signal.
The installation set ring type communication device on export pipeline；It is used to lead to lantern ring type including top base 4-7 and bottom base 4-8
News device is fixed on the export pipeline of water pump；Shell 4-6 is fixed on pedestal 4-7 by screw；By relay switch 4-3 type
Number JZX-22F5A, power supply unit 4-4 model LRS-100-24, capture card 4-5 model Smacq-TCP2610 are mounted on shell
In 4-6；Combined aural and visual alarm 4-1 model AD16-22SM is mounted on cover board 4-2；By capture card 4-5 model Smacq-
The input terminal of TCP2610 and 12 model MIK-P300 of inlet pressure sensor, 2 model MIK-P300 of outlet pressure sensor,
The signal wire of 3 model RHSA-10 of hydrophone is connected, for acquiring the current signal of each sensor and being converted into digital letter
Number；The output for being model Smacq-TCP2610 by relay switch 4-3 model JZX-22F5A input terminal and capture card 4-5
Terminal is connected, and relay switch 4-3 model JZX-22F5A output terminal is connected with combined aural and visual alarm AD16-22SM4-1, uses
Alarm is issued in controlling it.
Field monitoring platform 10 is connected by twisted pair with capture card 4-5 model Smacq-TCP2610；It is logical by TCP
Field data is transferred in the upper computer software developed in field monitoring platform 10 by news agreement to be handled.
Using LabVIEW as software platform, receives the digital signal transmitted by each acquisition module and pre-processed, by
Digital signal bound line style relationship corresponding with the foundation of transducer range bound is converted, and correct measured value is obtained；
It is realized using MATLAB programming to pretreated metered flow Qd=12.5m3/ h and revolving speed nd=2950r/min
Exit hydrophone measures voice signal progress wavelet threshold denoising before and after cavitation occurs for lower water pump；Using cavitation with respect to noise system
Number CRSNR concept denoises the index of effect, cavitation phase as judgement using different wavelet basis functions, Decomposition order, threshold function table
It is bigger to noise coefficient CRSNR, it was demonstrated that denoising effect is better；Select denoising effect best after comparison, cavitation is with respect to noise coefficient
The bior3.3 small echo that CRSNR is 0.7789, Decomposition order 3, rigrsure threshold value selection rule, global threshold soft-threshold letter
Number carries out wavelet threshold denoising.
The cavitation is with respect to noise coefficient CRSNR formula are as follows: CRSNR=SNRAfter cavitation/SNRBefore cavitation,
Wherein: SNRAfter cavitationSignal-to-noise ratio after cavitation occurs for water pump, SNRBefore cavitationSignal-to-noise ratio before cavitation occurs for water pump.
Signal-to-noise ratio formula are as follows:
Wherein: s (n) is original signal,For denoised signal, N is signal length.
In conjunction with Fig. 5, filtering front and back comparison diagram is as follows:
It is carried out by the time-domain signal that MATLAB programming carries noise to liquid after the above-mentioned generation cavitation after denoising
Short Time Fourier Transform obtains the frequency-region signal of liquid load noise after generation cavitation；Utilize db5 wavelet basis function, Decomposition order 6
Layer carries out wavelet decomposition and wavelet reconstruction to this frequency-region signal, obtains its 6 layers of high frequency coefficient and low frequency coefficient；Calculate the 6th layer
The signal averaging of low frequency coefficient is 0.0128, rises 20% with it, i.e., 0.0152 threshold value occurred as cavitation；Once the 6th
The signal averaging of layer low frequency coefficient is more than this threshold value, then judges that cavitation occurs.
In conjunction with Fig. 6, the right column of 6 layers of the high frequency coefficient decomposed and low frequency coefficient left column are as follows:
6 are carried out by the time-domain signal that MATLAB programming carries noise to liquid after the above-mentioned generation cavitation after denoising
Layer wavelet package transforms and wavelet package reconstruction, wavelet basis function db6, entropy standard are Shannon；(5,1) section after being decomposed to it
Coefficient carries out Fourier transformation and obtains its amplitude spectrum at point；The average value for calculating amplitude spectrum is 21.5, is risen with its average value super
25% is crossed, i.e., 26.875 judgment criterias occurred as the threshold value of cavitation generation as cavitation.
Its original waveform upper right corner, the WAVELET PACKET DECOMPOSITION tree construction upper left corner, (5,1) node coefficient analysis result lower left corner,
In conjunction with Fig. 7, the grayscale image lower right corner of coefficient is as follows after WAVELET PACKET DECOMPOSITION:
Real-time pump head H is obtained by MATLAB program calculation, is threshold value with rated head decline 3%, i.e.,
71.78m is as threshold value, once actual measurement lift is lower than this value, judges that cavitation occurs.
The lift H calculation formula are as follows:
Wherein: PoFor water pump discharge pressure, PiFor unit fixed on water pump suction pressure, ρ is the density that test(ing) medium density is water here, g
It is inlet and outlet difference in height for gravity acceleration g=9.8N/kg, Δ z.
Human-computer interaction interface is write by LabVIEW, to water pump inlet and outlet pressure, noise, pump head, flow, cavitation
Headroom data/curve on-line monitoring realizes overload alarm to the dynamic parameter setting bound of monitoring, to water pump type, type
Number, number, inlet and outlet caliber, the setting of the preset parameters such as Rated motor revolving speed and record, to the high speed of water pump inlet and outlet noise
Acquisition and pretreatment；The calling of centering MATLAB algorithm routine is realized by MATLAB Script node mode；As long as any
Situation in algorithm judges that cavitation has occurred and that, then by monitoring data and judging result write-in Access database at this time and life
At Execl report.
The net positive suction head NASH calculation formula are as follows:
Wherein: ρ is the density that test(ing) medium density is water here, and g is gravity acceleration g=9.8N/kg, PiFor water pump into
Mouth pressure, ViFor pump inlet flow velocity, PvIt is here the saturated vapour pressure of water for test(ing) medium.
Field monitoring platform 10 is connected to internet by optical fiber, the Access Database vendors at scene to network,
It is arranged to fixed IP address；It is provided with data server on monitoring platform 10 at the scene, is responsible for management collection in worksite and storage
Access database, and to cloud provide data access service；It may be simultaneously present multiple data servers, each server
There is fixed IP to identify as address；
There is management server beyond the clouds, is responsible for fixed ip address, the user information of each data server of management, receives
Remote control command and to data server issue control command；Also settable each user is to each field data in management server
The access limit of server, to distinguish one, two, three administrator right；Level-one permission is administrator, can check modification
All spot databases and user information, second level permission are user, can check its authorized spot database；Three-level permission
For child user, it can check that its higher level's second level permission authorizes him visible spot database；Long-range monitoring platform and cell phone customer
Hold the data obtained by user information and IP address by cloud on corresponding field data server.
The embodiment is the preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, is not carrying on the back
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement or
Modification all belongs to the scope of protection of the present invention.
The sensing device constituted for all types of sensors of initial signal acquisition arranged on water pump, is used as data transmission
High-speed collection card, the transmitting device that constitutes of communications protocol, and by scene, long-range monitoring platform and compiled upper computer software structure
At application apparatus.The acquisition device includes the inlet pressure sensor 12 installed on unit fixed on water pump suction pipeline；It is pumped out in water
Outlet pressure sensor, the hydrophone, flowmeter of mouth installation；The transmitting device includes with the lantern ring being mounted on export pipeline
Formula communication device；The application apparatus includes that field monitoring platform 10, Master Control Room of the scene for monitoring are long-range for monitoring
Monitoring platform and cell phone client.
The embodiment is a preferred embodiment of the present invention, but present invention is not limited to the embodiments described above, not
In the case where substantive content of the invention, any conspicuous improvement that those skilled in the art can make, replacement
Or modification all belongs to the scope of protection of the present invention.
Claims (6)
1. a kind of pump cavitation state monitoring apparatus, which is characterized in that including signal pickup assembly, signal transmitting apparatus and application
Device；The signal pickup assembly is arranged on water pump, the lantern ring type collected signal being transferred in signal transmitting apparatus
Communication device；The lantern ring type communication device transfers data to application apparatus.
2. pump cavitation state monitoring apparatus according to claim 1, which is characterized in that the signal pickup assembly includes
The inlet pressure sensor (12) being mounted on unit fixed on water pump suction pipeline and the outlet pressure sensor, the water that are mounted on export pipeline
Listen device and flowmeter.
3. pump cavitation state monitoring apparatus according to claim 2, which is characterized in that the signal transmitting apparatus also wraps
Include lantern ring type communication device；The lantern ring type communication device includes capture card (4-5)；The input terminal of the capture card (4-5)
It is connected with the signal wire of inlet pressure sensor (12), outlet pressure sensor, hydrophone, the electric current for acquiring sensor is believed
Number and collected current signal is converted into digital signal.
4. pump cavitation state monitoring apparatus according to claim 1, which is characterized in that the application apparatus is included in existing
Field monitoring platform (10), Master Control Room interior long-range monitoring platform and cell phone client for monitor of the field for monitoring.
5. pump cavitation state monitoring apparatus according to claim 1, which is characterized in that the lantern ring type communication device is also
Including combined aural and visual alarm (4-1), cover board (4-2), relay switch (4-3), power supply unit (4-4), capture card (4-5), shell
Body (4-6), top base (4-7) and bottom base (4-8)；The top base (4-7) and bottom base (4-8) are for communicating lantern ring type
Device is fixed on the export pipeline of water pump；The shell (4-6) is connected by screw with top base (4-7)；The relay
Switch (4-3), power supply unit (4-4), capture card (4-5) are mounted in shell (4-6)；Combined aural and visual alarm (4-1) peace
On cover board (4-2)；Relay switch (4-3) input terminal is connected with the output terminal of capture card (4-5), relay
Switch (4-3) output terminal is connected with combined aural and visual alarm (4-1), issues alarm for controlling it.
6. a kind of pump cavitation state monitoring method, which is characterized in that comprise the following steps that
Step 1) pass through the placement sensor acquisition initial current signal on water pump；
Step 2) by capture card (4-5) by step 1) in collected initial current signal be converted into digital signal；
Step 3) by by TCP communications protocol by step 2) in digital data transmission to field monitoring platform (10)；
Step 4) using LabVIEW as software platform, write host computer procedure, receiving step three) digital signal that transmits is simultaneously
It is pre-processed；
Step 5) realized using MATLAB programming to step 4) in pretreated data carry out wavelet threshold denoising；Using small
Wave analysis extracts cavitation and characteristic signal occurs and carries out cavitation state judgement；
Step 6) using LabVIEW write human-computer interaction interface；It is realized by LabVIEW by MATLAB Script node mode
To step 4) in pretreated data and step 5) in MATLAB cavitation state judge the calling of algorithm routine, by cavitation
State judging result real-time display is on software interface；
Step 7) using LabVIEW write host computer procedure, by step 4) in pretreated data and step 5) in
Scene Access database is written in real time and generates Execl report for cavitation state judging result；
Step 8) field monitoring platform (10) is connected to internet by 4G plug-in card/optical fiber, step 7) in scene
Access Database vendors are arranged to fixed IP address to network；Database IP address and user are carried out by cloud server
Information password storage；Long-range monitoring platform and cell phone client pass through user information password and IP address reading field monitoring platform
(10) pretreated data and cavitation state judging result in the Access database of scene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178923.0A CN109236684A (en) | 2018-10-10 | 2018-10-10 | A kind of pump cavitation state monitoring apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811178923.0A CN109236684A (en) | 2018-10-10 | 2018-10-10 | A kind of pump cavitation state monitoring apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109236684A true CN109236684A (en) | 2019-01-18 |
Family
ID=65054484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811178923.0A Pending CN109236684A (en) | 2018-10-10 | 2018-10-10 | A kind of pump cavitation state monitoring apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109236684A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242588A (en) * | 2019-06-03 | 2019-09-17 | 电子科技大学 | A kind of centrifugal pump diagnostic signal acquisition system and method for diagnosing faults |
| CN111306076A (en) * | 2020-02-26 | 2020-06-19 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694212A (en) * | 2009-10-21 | 2010-04-14 | 中国农业大学 | Pump and pump station integrated tester |
| CN204477705U (en) * | 2015-02-14 | 2015-07-15 | 西安热工研究院有限公司 | A kind of thermal power station water pump real-time online Cavitation detection early warning system |
| CN206331093U (en) * | 2016-12-23 | 2017-07-14 | 江苏大学镇江流体工程装备技术研究院 | A kind of centrifugal pump motor state monitoring apparatus based on Android platform |
| CN106979162A (en) * | 2017-04-26 | 2017-07-25 | 广东肯富来泵业股份有限公司 | Pump closed testing bench control system and method for testing |
| CN107448377A (en) * | 2017-07-13 | 2017-12-08 | 盛瑞传动股份有限公司 | A kind of test installation of pump |
-
2018
- 2018-10-10 CN CN201811178923.0A patent/CN109236684A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694212A (en) * | 2009-10-21 | 2010-04-14 | 中国农业大学 | Pump and pump station integrated tester |
| CN204477705U (en) * | 2015-02-14 | 2015-07-15 | 西安热工研究院有限公司 | A kind of thermal power station water pump real-time online Cavitation detection early warning system |
| CN206331093U (en) * | 2016-12-23 | 2017-07-14 | 江苏大学镇江流体工程装备技术研究院 | A kind of centrifugal pump motor state monitoring apparatus based on Android platform |
| CN106979162A (en) * | 2017-04-26 | 2017-07-25 | 广东肯富来泵业股份有限公司 | Pump closed testing bench control system and method for testing |
| CN107448377A (en) * | 2017-07-13 | 2017-12-08 | 盛瑞传动股份有限公司 | A kind of test installation of pump |
Non-Patent Citations (1)
| Title |
|---|
| 赵旭凌等: "基于LabVIEW的离心泵在线监测与故障诊断***设计及应用", 《东北电力大学学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242588A (en) * | 2019-06-03 | 2019-09-17 | 电子科技大学 | A kind of centrifugal pump diagnostic signal acquisition system and method for diagnosing faults |
| CN111306076A (en) * | 2020-02-26 | 2020-06-19 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
| CN111306076B (en) * | 2020-02-26 | 2022-01-11 | 江苏大学 | Device and method for testing backflow vortex cavitation of vane pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019218408A1 (en) | Internet of things-based device and method for monitoring typical health status of pump unit | |
| CN107461342B (en) | A kind of centrifugal pump fault inline diagnosis method and system | |
| CN102456419B (en) | Method for monitoring nuclear reactor canned motor pump operation fault and monitoring system | |
| CN109236684A (en) | A kind of pump cavitation state monitoring apparatus and method | |
| WO2022193436A1 (en) | Intelligent detection system for pump station | |
| CN107911396A (en) | Log in method for detecting abnormality and system | |
| CN103235277B (en) | The integrated debugging apparatus of Intelligent transformer station capacitive apparatus on-line monitoring system | |
| CN201891592U (en) | Engine oil pump detection system | |
| CN107060739B (en) | Storage type oil well working fluid level monitoring system and method | |
| CN112729836B (en) | Cycle improved water turbine cavitation initial state judging system and method thereof | |
| CN211975694U (en) | Online bearing maintenance system | |
| US11740122B2 (en) | Autonomous discrimination of operation vibration signals | |
| CN112460040A (en) | Pump sound wave monitoring system and method | |
| CN106840323A (en) | Diaphragm gas meter measuring and testing device and method | |
| CN113551765A (en) | Sound spectrum analysis and diagnosis method for equipment fault | |
| CN203191537U (en) | Intelligentized integration debug apparatus for on-line monitoring system of transformer station capacitive equipment | |
| CN106769053A (en) | A kind of hydraulic turbine fault diagnosis system and method based on acoustic emission signal | |
| CN110274650A (en) | A kind of oil consumption management system based on Internet of Things | |
| CN108490870B (en) | Intelligent fire-fighting operation experiment table and implementation monitoring method thereof | |
| CN206594317U (en) | Hydrophone sensitivity detector and its sound pressure signal collecting mechanism | |
| CN103033215A (en) | Engineering machinery hydraulic system medium pollution diagnostic method based on digital signal processor (DSP) | |
| CN106525205A (en) | Equipment for automatically testing performance technology of water meters | |
| CN109655274A (en) | A kind of environmental tester having failure of pump diagnostic function | |
| CN202582708U (en) | Jitter failure integrated diagnostic system | |
| CN220752158U (en) | Dynamic flow velocity detection device for gas relay calibration stand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190118 |