CN110068455A - A kind of device and method monitoring blade pump condition - Google Patents
A kind of device and method monitoring blade pump condition Download PDFInfo
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- CN110068455A CN110068455A CN201910346671.6A CN201910346671A CN110068455A CN 110068455 A CN110068455 A CN 110068455A CN 201910346671 A CN201910346671 A CN 201910346671A CN 110068455 A CN110068455 A CN 110068455A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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Abstract
The present invention provides a kind of device for monitoring blade pump condition, including Magnetic Flux Leakage Inspecting module, MCU kernel control module, information display module, warning circuit and power supply module, Magnetic Flux Leakage Inspecting module, MCU kernel control module, information display module and warning circuit are connected with power supply module respectively, and Magnetic Flux Leakage Inspecting module, information display module and warning circuit are connected with MCU kernel control module respectively；Magnetic Flux Leakage Inspecting module includes leakage field induction coil and signal processing circuit, and tangential magnetic field component of the leakage field induction coil for pickup blades pump driving motor outer surface, signal processing circuit is for improving the rotor frequency and power grid power frequency of motor flux leakage signal；MCU kernel control module is used to read out the induced voltage virtual value of the rotor frequency after signal processing circuit is conditioned, power grid power frequency and leakage field induction coil；And MCU kernel control module according to induced voltage virtual value, rotor frequency and power grid power frequency for being calculated to obtain motor real output.
Description
Technical field
The present invention relates to blade pump technical field, in particular to a kind of device and method for monitoring blade pump condition.
Background technique
Pump is the important energy conversion of one kind and fluid conveying equipment, and it is 120736967 that China in 2016, which pumps yield, together
Than increasing by 2.67%.The 1-7 month in 2017, Chinese pump yield was 72295449, increased by 8.77% on a year-on-year basis, above data illustrates
It pumps and is widely used to national economy various aspects as a kind of important universal machine.In China, class product year power consumption is pumped
Account for about the 1/3 of national power consumption total amount, reflects the huge of its energy consumption, the sternness of energy saving situation.Pump is transported under off-design behaviour
Guild causes huge energy waste, will lead under serious conditions and pumps out of service or even can cause accident in industry spot.Therefore
Exploitation is accurate and reliable, operates easy vane pump operating condition monitoring device for judging whether blade pump operation is energy saving and sentences
Whether disconnected blade pump operation has safely important Practical significance.
The development of pump condition monitoring technology is after two periods.First period needs operator's manual record number
According to instrument error is big, and monitoring efficiency is low, and heavy workload is inconvenient.Second period is developed rapidly by computer technology
Influence, pump condition monitoring technology constantly and sensor technology, frequency converter regulation technology, data acquisition technology, virtual instrument technology
It combines, intelligence degree steps up.But domestic pump condition monitoring technology is compared with some developed countries, and applicability is also not
Enough degree of integration is lower extensively, and remain unchanged weakness in terms of data processing and in Embedded Application.
Currently used pump condition monitoring method usually using a variety of Typical physical quantity sensors, such as pressure sensor,
Vibrating sensor, flowmeter etc. are respectively monitored a certain item specific operation of pump, then by work information obtained in upper
It carries out summarizing display on the machine of position.Although this monitoring of working condition method can realize that the acquisition to work information monitors substantially, use
Monitoring device is more, and signal input part is more, and sensor wire wiring is complicated, and man-machine interaction is poor, and information integration degree is not high, some surveys
The unit price of measuring appratus is even more than the acquisition cost pumped, while being influenced by water pump operation scene by complicated electromagnetic interference, data
The stability and real-time of transmission are poor.Certain measuring instruments need to be mounted on the rotation exposed parts of shaft or motor, destroy
The globality of pump and electric system.
Therefore a kind of non-intrusion type is researched and developed, cost performance is high, and wiring is convenient, moves, small in size, easy-operating blade pump condition
Monitoring device seems more urgent.
Summary of the invention
The invention solves be test equipment existing for existing vane pump monitoring of working condition method is numerous, test equipment is expensive,
The technical issues of being routed the defects of wiring is many and diverse, destroying monitoring object mechanical structure.
In order to solve the above technical problems, first aspect present invention, discloses a kind of device for monitoring blade pump condition, it is special
Sign is: including Magnetic Flux Leakage Inspecting module, MCU kernel control module, information display module, warning circuit and power supply module,
The Magnetic Flux Leakage Inspecting module, the MCU kernel control module, the information display module and the warning circuit point
It is not connected with the power supply module,
The Magnetic Flux Leakage Inspecting module, the information display module and the warning circuit are controlled with the MCU core respectively
Module is connected；
The Magnetic Flux Leakage Inspecting module includes leakage field induction coil and signal processing circuit, and the leakage field induction coil is for picking up
The tangential magnetic field component of vane pump driving motor outer surface is taken, the signal processing circuit is used to improve turning for motor flux leakage signal
Sub- frequency and power grid power frequency；
The MCU kernel control module is for reading out the frequency of the rotor after the signal processing circuit is conditioned
The induced voltage virtual value of rate, the power grid power frequency and the leakage field induction coil；And the MCU kernel control module is used for
It is calculated to obtain motor reality output function according to the induced voltage virtual value, the rotor frequency and the power grid power frequency
Rate；
The information display module is used to show the monitoring information of vane pump.
Optionally, the MCU kernel control module is for Q-P, Q-H and Q- according to monitored vane pump in the case where determining revolving speed
Blade pump discharge, lift and electric efficiency work information is calculated in η characteristic curve, to realize the reality of vane pump work information
When monitor.
Optionally, the signal processing circuit includes active low-pass filter circuit, active bandpass filiter circuit, virtual value turn
Change circuit, amplitude limiting amplifier circuit and shaping circuit；
The active low-pass filter circuit goes out the rotor frequency signal below of 5Hz in magnetic leakage signal for leaching；It is described to have
Source bandwidth-limited circuit goes out the power grid power frequency component that frequency in magnetic leakage signal is 45Hz-55Hz for leaching；The virtual value turns
Circuit is changed for carrying out direct current conversion to leakage field AC signal, and acquires the induced voltage virtual value of the leakage field induction coil；
The amplitude limiting amplifier circuit guarantees voltage for ensuring that signal voltage reaches the identification requirement of the MCU kernel control module
It is not too high to burn subsequent conditioning circuit；The shaping circuit makes output signal become frequency rule and close side for Zero-cross comparator
The signal of wave.
Optionally, the signal processing circuit further includes photoelectric isolating circuit, and the photoelectric isolating circuit is for preventing list
Interference of the piece machine by external input signal, to realize being isolated for the MCU kernel control module and electric signal.
Optionally, the information display module includes display screen and/or mobile terminal.
Optionally, the warning circuit includes LED light, buzzer and control circuit, and the LED light and the buzzer divide
Do not connect with the MCU kernel control module, the MCU kernel control module be used for by output level control LED light it is bright or
It goes out and controls the sounding of the buzzer.
Optionally, the warning circuit is used to indicate the fault condition or off-design behaviour that vane pump is likely to be at, described
Fault condition or off-design behaviour include vane pump driving motor phase shortage, impeller of vane pump cavitation and vane pump reversion.
Optionally, the LED light is red yellowish green trichromatism LED light, wherein red LED lamp is bright and the buzzer is rung indicates
Vane pump driving motor phase shortage, yellow LED lamp is bright and the buzzer is rung indicates impeller of vane pump cavitation, green LED lamp it is bright and
The buzzer, which is rung, indicates vane pump reversion.
Second aspect of the present invention discloses a kind of method for monitoring blade pump condition, which comprises
Stator current frequency and rotor current frequency in the induced current of leakage field induction coil are obtained, it is real-time to calculate motor
Revolving speed；
Leakage field incudes under leakage field induction coil voltage virtual value and motor nominal load when obtaining motor no-load
Coil voltage virtual value is calculated according to leakage field coil voltage virtual value under the rated output torque of motor and motor real time execution
The real-time output torque of the motor shaft end of motor out；
Output power of motor is calculated according to the real-time revolving speed of the motor and the real-time output torque；
According to Q-P, Q-H and Q- η characteristic curve of the monitored vane pump in the case where determining revolving speed, be calculated blade pump discharge,
Lift and electric efficiency work information, and the duty parameter by obtaining judges whether vane pump is in fault condition or non-sets
It is run under meter operating condition.
Optionally, the method also includes:
If vane pump driving motor phase shortage, drives red LED bright, and drive buzzer rings；
If cavitation occurs for impeller of vane pump and index of correlation meets preset reference value, drive yellow LED lamp bright, and drive
Buzzer rings；
If vane pump inverts, drive green LED lamp bright, and drive buzzer rings；
Otherwise, it is operated without early warning.
By adopting the above technical scheme, the invention has the following beneficial effects:
The present invention realizes the real-time monitoring of blade pump condition by picking up outer surface of motor leakage field, compared to traditional blade
Pump condition monitoring device, at low cost, small in size, non-intrusion type, easy to operate, information integration degree has a distinct increment.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is each functional module structure schematic diagram based on leakage field monitoring blade pump condition device outside motor；
Fig. 2 is the schematic diagram in kind based on leakage field monitoring blade pump condition device outside motor；
Fig. 3 is the monitoring flow chart of motor speed, motor output torque and output power of motor；
Fig. 4 is process flow diagram of the signal processing circuit to magnetic leakage signal；
Fig. 5 is 10 rank active low-pass filter circuit design drawings；
Fig. 6 is 2 rank active bandpass filiter circuit design drawings；
Fig. 7 is vane pump work information monitoring flow chart；
Fig. 8 is the program work flow chart of monolithic microcomputer kernel control module；
It remarks additionally below to attached drawing:
1- Magnetic Flux Leakage Inspecting module；11- leakage field induction coil；
2-MCU kernel control module；21- single-chip microcontroller；
3- information display module；31-LCD display screen；32- Android client；
4- warning circuit；
5- power supply module.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
" one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one implementation of the invention
A particular feature, structure, or characteristic.In the description of the present invention, it is to be understood that, term " on ", "lower", "top", "bottom" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot
It is interpreted as indication or suggestion relative importance or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can be expressed or what is implied includes one or more of the features.Moreover, term " first ",
" second " etc. is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that in this way
The data used are interchangeable under appropriate circumstances, so that the embodiment of the present invention described herein can be in addition to scheming herein
Sequence other than those of showing or describe is implemented.
It is inconvenient to solve the installation of conventional centrifugal pump monitoring of working condition method, it is with high costs, it is complicated for operation, destroy equipment integraty
The problems such as, the invention proposes a kind of method and apparatus based on Magnetic Flux Leakage Inspecting blade pump condition outside motor.
As shown in Figure 1, a kind of device for monitoring blade pump condition, including Magnetic Flux Leakage Inspecting module 1, MCU kernel control module
2, information display module 3, warning circuit 4 and power supply module 5,
The Magnetic Flux Leakage Inspecting module 1, the MCU kernel control module 2, the information display module 3 and alarm electricity
Road 4 is connected with the power supply module 5 respectively,
The Magnetic Flux Leakage Inspecting module 1, the information display module 3 and the warning circuit 4 respectively with the MCU core control
Molding block 2 is connected；
The Magnetic Flux Leakage Inspecting module 1 includes leakage field induction coil 11 and signal processing circuit, the leakage field induction coil 11
For the tangential magnetic field component of pickup blades pump driving motor outer surface, the signal processing circuit is for improving motor flux leakage letter
Number rotor frequency and power grid power frequency；
The MCU kernel control module 2 is for reading out the frequency of the rotor after the signal processing circuit is conditioned
Rate and the power grid power frequency, and acquire the induced voltage virtual value of the leakage field induction coil 11；And the MCU core control
Module 2 is used to that blade pump motor to be calculated according to the induced voltage virtual value, the rotor frequency and the power grid power frequency
Output torque and motor speed；
The information display module 3 is used to show the monitoring information of vane pump.
Motor reality can be calculated by the motor output torque and motor speed obtained in the MCU kernel control module 2
Border output power, i.e. blade pump input power.
Specifically, the motor flux leakage signal amplitude after after conditioning is stablized in 3.3V or so, can be controlled by MCU core
Read rotor frequency and power grid power frequency in the timer frequency capture channel of module 2；Pass through the AD of MCU kernel control module 2 simultaneously
Acquisition channel acquires the output valve of the output pin of AD637 RMS conversion chip, to obtain the leakage field induction coil 11
The virtual value of induced voltage.
According to flow velocity Q- shaft power P, flow velocity Q- lift H, flow velocity Q- efficiency eta characteristic of the monitored vane pump in the case where determining revolving speed
Curve, in conjunction with pump similarity law, the characteristic equation converted pump characteristic curve under transient speed brings output power of motor into,
Blade pump discharge, lift and electric efficiency work information is calculated, realizes the real-time monitoring of work information.Output power of motor
As water pump input power.
In some embodiments, the MCU kernel control module 2 includes single-chip microcontroller 21 and peripheral circuit, the single-chip microcontroller
21 can be STM32, acquire to AD, frequency acquisition, and data calculate and information is sent.
Duty parameter when the MCU kernel control module 2 is run under fault condition or off-design behaviour according to vane pump
Variation characteristic, judge whether vane pump is under fault condition or off-design behaviour and run, and control warning circuit 4 carry out after
Continuous operation.The warning circuit 4 in the case where vane pump is in off-design behaviour or fault condition for running, and correlation discriminating refers to
Mark alarms to operator when meeting operator's setting value.
Work information calculated is summarized and is sent to information display module 3 by the MCU kernel control module 2 to be shown
Show.The information display module 3 includes two kinds of display platforms of LCD display 31 and Android mobile client.The LCD display
31 and the Android mobile client be equipped with corresponding display option with real-time display work information.The Android mobile client with
The communication modes of the MCU kernel control module 2 are bluetooth communication mode or GPRS communication modes.
The signal processing circuit include active low-pass filter circuit, active bandpass filiter circuit, RMS-DC converter circuit,
Amplitude limiting amplifier circuit, shaping circuit and photoelectric isolating circuit；The active low-pass filter circuit is 10 rank low-pass filter circuits, is used
Go out the rotor frequency signal below of 5Hz in magnetic leakage signal in leaching.The active device of the active low-pass filter circuit can select
With OP07C chip.
The active bandpass filiter circuit is 2 rank bandwidth-limited circuits, and going out frequency in magnetic leakage signal for leaching is 50Hz
The power grid power frequency component of left and right.The active device of the active bandpass filiter circuit can select OP07C chip.
The leakage field induction coil 11 is that two enamel covered wire coils are connected, and iron core system is inserted among coil
, the number of turns of the coil is 8570, and the line footpath of the coil is 0.09mm, and the iron core is 45 steel.In possible embodiment party
In formula, the leakage field induction coil 11 can also be connected in series by the ac contactor coil of 3 8570 circles.
The RMS-DC converter circuit is completed to convert the direct current of leakage field AC signal using RMS conversion chip, and
Complete the acquisition to leakage field voltage effective value.The RMS conversion chip can be AD637 chip.
The amplitude limiting amplifier circuit guarantees that voltage will not for ensuring that signal voltage reaches the identification requirement of single-chip microcontroller 21
It is excessively high to burn subsequent conditioning circuit.The core amplifier chip of the amplitude limiting amplifier circuit can be LM358 chip.
The shaping circuit makes output signal become frequency rule and close to the signal of square wave for Zero-cross comparator.It is described whole
The core amplifier chip of shape circuit can be LM311 chip.
The photoelectric isolating circuit is for preventing single-chip microcontroller 21 by the interference of external input signal, to realize single-chip microcontroller 21
With being isolated for electric signal.Specifically, PC817 optocoupler, which can be selected, constructs photoelectric isolating circuit.
The warning circuit 4 is made of LED light, buzzer and control circuit, the control of the LED light and the buzzer
Foot is connect with the pin (GPIO pin) of the single-chip microcontroller 21, by the output level of the single-chip microcontroller 21 control LED light it is bright or
It goes out and controls the sounding of the buzzer, to realize the purpose alarmed monitoring personnel.
The warning circuit 4 indicates the three kinds of fault conditions or non-design work that vane pump is likely to be at using three-color LED light
Condition, specifically, red LED lamp is bright and buzzer rings expression vane pump driving motor phase shortage；Yellow LED lamp is bright and buzzer rings table
Show impeller of vane pump cavitation, and cavitation discriminant criterion meets monitoring personnel's setting value；Green LED lamp is bright and buzzer is rung indicates leaf
Piece pump reversion.
The power supply module 5 is made of Switching Power Supply and voltage stabilizing chip, the Switching Power Supply offer+5V and tri- tunnel ± 12V
DC output voltage, -5V DC output voltage are provided by voltage stabilizing chip for the voltage regulator circuit conversion that core devices construct.It is described steady
Pressing chip can be MC34063.
The information display module 3 includes LCD display 31 and Androi d client, to carry out man-machine data friendship
Mutually.
Specifically, the Magnetic Flux Leakage Inspecting module 1 connects the MCU kernel control module 2；The MCU kernel control module 2
Connect the LCD display 31 of the information display module 3；The power supply module 5 respectively with the Magnetic Flux Leakage Inspecting module 1, MCU core
LCD display 31 in heart control module 2, information display module 3, the buzzer in warning circuit 4 are connected.Each functional module
It is embedded on one piece of rectangle pcb board, the schematic diagram in kind of device is as shown in Figure 2.
When operator carries out vane pump monitoring of working condition using apparatus of the present invention, by leakage field induction coil 11 along motor surface
It is tangential to place, and give system energization.
Realize that the principle of the present invention is as follows:
After asynchronous machine is powered, fundamental wave rotating excitation field and harmonic wave rotating excitation field can be generated, not by non-uniform air-gap and shaft
Influence to medium factor understands some magnetic flux and is not connected with rotor windings and forms stator leakage flux.At the same time, rotor
In induced current corresponding magnetic field can be also incuded in winding rotary course.Two kinds of magnetic can be captured using leakage field induction coil 11
The induced current of field captures the stator current frequency for including in induced current and rotor current frequency, and root by single-chip microcontroller 21
The real-time revolving speed of motor is calculated according to following formula.
Wherein, f1 is power grid power frequency；F2 is rotor frequency；Pm is motor pole logarithm.
11 voltage of leakage field induction coil when motor no-load is first acquired by single-chip microcontroller 21 and RMS conversion chip
11 voltage effective value of leakage field induction coil under virtual value, motor nominal load.It is connect after load is powered in system and passes through single-chip microcontroller
Leakage field coil voltage virtual value under 21 acquisition motor real time executions.In conjunction with the rated output torque of this three parameters and motor, lead to
The real-time output torque of motor shaft end can be calculated by crossing following formula.
Wherein, U is 11 voltage effective value of leakage field induction coil under the motor real time execution that single-chip microcontroller 21 acquires out；U0For
11 voltage effective value of leakage field induction coil when motor no-load；UnFor 11 voltage of leakage field induction coil under motor nominal load
Virtual value；TnFor the rated output torque of motor, TnIt is calculated according to following formula:
On the basis of the acquisition real-time output torque of motor shaft end, the real-time revolving speed of motor, output power of motor can be calculated.
On the basis of having obtained three motor speed, motor shaft end output torque, output power of motor operating parameters, by monitored leaf
Piece pumps the Q-P in the case where determining revolving speed, Q-H, and the flow of vane pump, lift is calculated in conjunction with pump similarity law in Q- η characteristic curve
Equal work informations.The variation of duty parameter when single-chip microcontroller 21 is then run under fault condition or off-design behaviour according to vane pump
Feature judges whether vane pump is under fault condition or off-design behaviour and runs, and carries out subsequent operation, to realize to leaf
The real-time monitoring of the operating condition of piece pump.
The leakage field induction coil 11 of above-mentioned apparatus is tangentially placed along motor surface, Magnetic Flux Leakage Inspecting module 1 can will be outside motor
Portion's leakage field is converted into leakage field voltage, and single-chip microcontroller 21 is acquired and handles to leakage field voltage, then realizes the operating condition prison of vane pump
It surveys, is specifically described as follows.
Motor speed, motor shaft end output torque, the monitoring process of output power of motor:
The present invention is as shown in Figure 3 to the monitoring process of motor speed, motor output torque and output power of motor.Signal becomes
Analytic operation is carried out respectively for three tunnels.Wherein two-way magnetic leakage signal need to be handled by signal processing circuit so as to the progress of single-chip microcontroller 21
Frequency acquisition calculates revolving speed, and signal processing circuit is as shown in Figure 4 to the process flow of magnetic leakage signal, wherein magnetic leakage signal is all the way
After the conditioning of active 10 rank low-pass filter circuit, low-frequency weak signal obtains amplifying while eliminating high-frequency harmonic interference, uses
To acquire the rotor frequency signal below of 5Hz in outside motor leakage field.Magnetic leakage signal another way passes through active 2 rank bandpass filter
Handle the power grid power frequency component to acquire 50Hz or so.Active 10 rank low-pass filter circuit is as shown in figure 5, active 2 rank band logical
Filter circuit is as shown in Figure 6.Amplitude limiting amplifier circuit processing is further handled two paths of signals, and signal amplitude is made to reach monolithic
The identification of machine 21 requires while avoiding voltage amplification is excessively high from burning out subsequent conditioning circuit.Signal electricity after amplification amplitude limiter circuit is processed
Peak steady is pressed to export 5V crest voltage when signal voltage being made to be greater than 0V using the processing of shaping circuit in 0.7V or so, when
Voltage then exports 0V when being less than 0V.Leakage field voltage signal after shaped processing of circuit becomes more regular square wave.To prevent
Single-chip microcontroller 21 is interfered by input signal, and building optical coupling isolation circuit realizes the electric signal isolation of single-chip microcontroller 21, while by upper
Pull-up resistor, stablizes signal amplitude in 3.3V or so, realizes High frequency filter with multistage capacitor, single-chip microcontroller 21 is made to stablize capture two
The real-time monitoring to revolving speed can be realized further according to formula in road pulse signal frequency.
Third road magnetic leakage signal completes the direct current conversion of AC signal by RMS conversion chip, and single-chip microcontroller 21 passes through
AD acquisition channel acquires the output valve of RMS conversion chip output pin in real time.It is transported in conjunction with the motor acquired in advance in zero load
11 electricity of leakage field induction coil of 11 voltage effective value of leakage field induction coil and motor in specified operating status when row state
It is pressed with valid value, motor shaft end output torque can be calculated according to formula.By the motor speed and the motor output that have monitored acquisition
Torque can calculate the output power of motor.
2, the monitoring process of vane pump duty parameter:
It is illustrated in figure 7 vane pump work information monitoring flow chart.The general performance of centrifugal pump can be by constant rotational speed
In the case where function as flow velocity Q, visualized for the characteristic curve of lift H, shaft power P and efficiency eta.In conjunction with revolution speed
With the similarity law of pump, the characteristic equation converted pump characteristic curve under transient speed, bringing output power of motor into, (water pump is defeated
Enter power), every work information of water pump can be calculated.According to every work information of water pump, single-chip microcontroller 21 can differentiate from
Operating status locating for heart pump, and whether intelligent decision carries out the operation such as subsequent early warning.
3, man-machine information interaction process:
System shows monitoring information by the 31 two kinds of platforms in cell phone end and LCD display.Cell phone end is usually used in
Scene is unattended, and factory site is narrow, bad environments, the blade pump condition prison under the special operations environment such as connection inconvenience arrangement
It surveys.The present invention stored using quick-witted cloud as data analysis cloud platform, single-chip microcontroller 21 by WiFi mould group to institute's monitoring data into
Row is packaged, and is transmitted through the network to the remote server of quick-witted cloud platform, and Android client 32 passes through logical with remote server
The dynamic realtime of reliable existing monitoring data obtains；LCD display 31 is installed on monitoring system surfaces, and MCU kernel control module 2 is logical
It crosses 16 80 parallel ports and realizes that information shows that transmission speed is fast on LCD display 31, data reliability is high.Warning circuit 4 is by bee
Ring device, the LED light and its peripheral circuit composition of three kinds of colors.Wherein, if the system determine that vane pump driving motor phase shortage, then MCU
Kernel control module 2 drives red LED bright, and drives buzzer rings；If the system determine that cavitation and phase occur for impeller of vane pump
It closes index and meets monitoring personnel's setting reference value, then MCU kernel control module 2 drives yellow LED lamp bright, and buzzer is driven to ring
It rings；If the system determine that vane pump inverts, then MCU kernel control module 2 drives green LED lamp bright, and drives buzzer rings.If
System does not meet above-mentioned three kinds of situations to the differentiation result of vane pump operating condition, then operates without early warning.
To realize above-mentioned monitoring effect, relevant programming is carried out to MCU kernel control module 2.MCU core controls mould
The program work process of block 2 is as shown in Figure 8.After the reset of single-chip microcontroller 21, MCU kernel control module 2 is successively to each functional module
It initializes, motor speed, motor output torque, output power of motor, then root is then calculated by acquired information
Calculate the duty parameter of vane pump according to this three operation informations, and analyze vane pump working condition, determine warning circuit 4 whether work
Make, while being sent to each platform and carrying out information exchange.Data refresh time is configured in program, to guarantee data actual effect
Property.By above procedure workflow, reach the purpose that real-time monitoring is carried out to blade pump condition.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of device for monitoring blade pump condition, it is characterised in that: including Magnetic Flux Leakage Inspecting module, MCU kernel control module, letter
Display module, warning circuit and power supply module are ceased,
The Magnetic Flux Leakage Inspecting module, the MCU kernel control module, the information display module and the warning circuit respectively with
The power supply module is connected,
The Magnetic Flux Leakage Inspecting module, the information display module and the warning circuit respectively with the MCU kernel control module
It is connected；
The Magnetic Flux Leakage Inspecting module includes leakage field induction coil and signal processing circuit, and the leakage field induction coil is for picking up leaf
Piece pumps the tangential magnetic field component of driving motor outer surface, and the signal processing circuit is used to improve the rotor frequency of motor flux leakage signal
Rate and power grid power frequency；
The MCU kernel control module is for reading out the rotor frequency after the signal processing circuit is conditioned, institute
State the induced voltage virtual value of power grid power frequency and the leakage field induction coil；And the MCU kernel control module is used for basis
The induced voltage virtual value, the rotor frequency and the power grid power frequency are calculated to obtain motor real output；
The information display module is used to show the monitoring information of vane pump.
2. the device of monitoring blade pump condition according to claim 1, it is characterised in that: the MCU kernel control module
For Q-P, Q-H and Q- η characteristic curve according to monitored vane pump in the case where determining revolving speed, blade pump discharge, lift is calculated
With electric efficiency work information, to realize the real-time monitoring of vane pump work information.
3. the device of monitoring blade pump condition according to claim 1, it is characterised in that: the signal processing circuit includes
Active low-pass filter circuit, active bandpass filiter circuit, RMS-DC converter circuit, amplitude limiting amplifier circuit and shaping circuit；
The active low-pass filter circuit goes out the rotor frequency signal below of 5Hz in magnetic leakage signal for leaching；The active band
Bandpass filter circuit goes out the power grid power frequency component that frequency in magnetic leakage signal is 45Hz-55Hz for leaching；The RMS-DC converter electricity
Road is used to carry out direct current conversion to leakage field AC signal, and acquires the induced voltage virtual value of the leakage field induction coil；It is described
Amplitude limiting amplifier circuit guarantees that voltage will not for ensuring that signal voltage reaches the identification requirement of the MCU kernel control module
It is excessively high to burn subsequent conditioning circuit；The shaping circuit makes output signal become frequency rule and close to square wave for Zero-cross comparator
Signal.
4. the device of monitoring blade pump condition according to claim 3, it is characterised in that: the signal processing circuit is also wrapped
Photoelectric isolating circuit is included, the photoelectric isolating circuit is for preventing interference of the single-chip microcontroller by external input signal, to realize
State being isolated for MCU kernel control module and electric signal.
5. the device of monitoring blade pump condition according to claim 1, it is characterised in that: the information display module includes
Display screen and/or mobile terminal.
6. the device of monitoring blade pump condition according to claim 3, it is characterised in that: the warning circuit includes LED
Lamp, buzzer and control circuit, the LED light and the buzzer are connect with the MCU kernel control module respectively, described
MCU kernel control module is used for bright by output level control LED light or goes out and control the sounding of the buzzer.
7. the device of monitoring blade pump condition according to claim 6, it is characterised in that: the warning circuit is for indicating
The fault condition or off-design behaviour that vane pump is likely to be at, the fault condition or off-design behaviour include vane pump driving electricity
Machine phase shortage, impeller of vane pump cavitation and vane pump reversion.
8. the device of monitoring blade pump condition according to claim 7, it is characterised in that: the LED light is reddish yellow green three
Color LED light, wherein red LED lamp is bright and the buzzer is rung indicates vane pump driving motor phase shortage, and yellow LED lamp is bright and institute
Stating buzzer and ringing indicates impeller of vane pump cavitation, and green LED lamp is bright and the buzzer is rung indicates vane pump reversion.
9. a kind of method for monitoring blade pump condition, which is characterized in that the described method includes:
Stator current frequency and rotor current frequency in the induced current of leakage field induction coil are obtained, motor is calculated and turns in real time
Speed；
Leakage field induction coil under leakage field induction coil voltage virtual value and motor nominal load when obtaining motor no-load
Voltage effective value calculates electricity according to leakage field coil voltage virtual value under the rated output torque of motor and motor real time execution
The real-time output torque of the motor shaft end of motivation；
Output power of motor is calculated according to the real-time revolving speed of the motor and the real-time output torque；
According to Q-P, Q-H and Q- η characteristic curve of the monitored vane pump in the case where determining revolving speed, blade pump discharge, lift is calculated
With electric efficiency work information, and by obtain duty parameter judge whether vane pump is in fault condition or non-design work
It is run under condition.
10. the method for monitoring blade pump condition according to claim 9, which is characterized in that the method also includes:
If vane pump driving motor phase shortage, drives red LED bright, and drive buzzer rings；
If cavitation occurs for impeller of vane pump and index of correlation meets preset reference value, drive yellow LED lamp bright, and drive buzzing
Device ring；
If vane pump inverts, drive green LED lamp bright, and drive buzzer rings；
Otherwise, it is operated without early warning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910346671.6A CN110068455A (en) | 2019-04-27 | 2019-04-27 | A kind of device and method monitoring blade pump condition |
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| CN110068455A true CN110068455A (en) | 2019-07-30 |
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| CN201910346671.6A Pending CN110068455A (en) | 2019-04-27 | 2019-04-27 | A kind of device and method monitoring blade pump condition |
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| CN112254956A (en) * | 2020-10-10 | 2021-01-22 | 重庆邮电大学 | Magnetoelectric integrated plastic micro-transmission system fault detection device and detection method thereof |
| CN114002061A (en) * | 2021-10-21 | 2022-02-01 | 山东鑫海矿业技术装备股份有限公司 | Impeller monitoring method, equipment and medium of vortex crusher based on radial force |
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| 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 |
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| CN112254956A (en) * | 2020-10-10 | 2021-01-22 | 重庆邮电大学 | Magnetoelectric integrated plastic micro-transmission system fault detection device and detection method thereof |
| CN114002061A (en) * | 2021-10-21 | 2022-02-01 | 山东鑫海矿业技术装备股份有限公司 | Impeller monitoring method, equipment and medium of vortex crusher based on radial force |
| CN114002061B (en) * | 2021-10-21 | 2024-02-20 | 山东鑫海矿业技术装备股份有限公司 | Impeller monitoring method, equipment and medium of vortex breaker based on radial force |
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Application publication date: 20190730 |