CN107091946B - It is a kind of electricity permanent magnetic controller and electric permanent-magnet suction disc material adsorb detection method - Google Patents
It is a kind of electricity permanent magnetic controller and electric permanent-magnet suction disc material adsorb detection method Download PDFInfo
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- CN107091946B CN107091946B CN201610498239.5A CN201610498239A CN107091946B CN 107091946 B CN107091946 B CN 107091946B CN 201610498239 A CN201610498239 A CN 201610498239A CN 107091946 B CN107091946 B CN 107091946B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
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Abstract
The invention discloses a kind of electric permanent-magnet suction disc materials to adsorb detection method, comprising: in advance in the case where electric permanent-magnet suction disc zero load, obtains the first DC pulse current of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process；In the case where electric permanent-magnet suction disc adsorbs material, electric permanent-magnet suction disc is obtained in magnetization process, the second DC pulse current of electric permanent magnetic controller output；Judge whether the second DC pulse current is greater than the first DC pulse current；If so, determining that electric permanent-magnet suction disc is adsorbed with load.Using the first DC pulse current as the standard of judgement, when the second DC pulse current is greater than the first DC pulse current, determine that electric permanent-magnet suction disc is adsorbed with material at this time, otherwise determine that electric permanent-magnet suction disc is unloaded at this time, can then staff be notified to overhaul, improve the safety of the operation of the mechanical system where electric permanent-magnet suction disc.The present invention also provides a kind of electric permanent magnetic controllers, and effect is same as mentioned above, and this will not be repeated here.
Description
Technical field
The present invention relates to electric permanent magnetic controller technical fields, more particularly to a kind of electric permanent magnetic controller and electric permanent-magnet suction disc
Material adsorbs detection method.
Background technique
With the development of science and technology, electric permanent-magnet suction disc is made in machinery as a kind of economic and environment-friendly clamping apparatus
Industry is made to be widely applied.
Electric permanent-magnet suction disc is the different characteristics using different permanent-magnet materials, the distribution by electric-control system to its inside magnetic circuit
It is controlled and is converted, make permanent magnetic field in internal system Equilibrium, be externally characterized as demagnetization relaxation state, i.e. not suction shape
State；Or it is discharged into the work magnetic pole strength of electric permanent magnet, externally it is characterized as the clamped condition that magnetizes, i.e. suction state.And electric permanent magnet controlled
Device processed is the device for controlling electric permanent-magnet suction disc operation, and function includes the forward and reverse DC pulse current of output, and Parameter adjustable,
Time of magnetizing is adjustable.Electric permanent magnetic controller has the zero passage detection function to the AC signal of input using single-chip microcontroller as control core
Can, silicon-controlled or IGBT constant power device triggering and conducting angle can be calculated automatically according to the output voltage set, and
The triggering to power device is realized in the time of setting, changes output electricity according to the relay contact for changing angle of flow or outside
Demagnetized state is filled with change electric permanent-magnet suction disc in the direction of stream.However, current electric permanent-magnet suction disc magnetize complete when, may
The case where absorption material can be occurred without, or the incorrect situation in material position of absorption, this is to where electric permanent-magnet suction disc
It can flog a dead horse, or even security performance can be had an impact for lathe.
Thus, electric permanent-magnet suction disc how is learnt in adsorbed state when completing that magnetizes, and is this to improve security performance
The current technical issues that need to address of field technical staff.
Summary of the invention
The object of the present invention is to provide a kind of electric permanent-magnet suction disc materials to adsorb detection method, can learn that electric permanent-magnet suction disc exists
The adsorbed state to magnetize when completing, to improve security performance.
In order to solve the above technical problems, the present invention provides the following technical scheme that
A kind of electric permanent-magnet suction disc material absorption detection method, comprising:
In advance in the case where electric permanent-magnet suction disc zero load, the electric permanent-magnet suction disc electric permanent magnetism control in magnetization process is obtained
First DC pulse current of device output；
In the case where the electric permanent-magnet suction disc adsorbs material, the electric permanent-magnet suction disc is obtained in magnetization process, it is described
Second DC pulse current of electric permanent magnetic controller output；
Judge whether second DC pulse current is greater than first DC pulse current；
If so, determining that the electric permanent-magnet suction disc is adsorbed with load.
Preferably, further includes:
In advance in the case where electric permanent-magnet suction disc is fully loaded, the electric permanent-magnet suction disc electric permanent magnetism control in magnetization process is obtained
The third DC pulse current of device output；
Judge whether second DC pulse current is less than the third DC pulse current；
If so, determining the electric permanent-magnet suction disc underload.
Preferably, it is electric in magnetization process to obtain the electric permanent-magnet suction disc in the case where electric permanent-magnet suction disc zero load in advance
First DC pulse current of permanent magnetic controller output, comprising: in advance in the case where electric permanent-magnet suction disc zero load, obtain the electricity
Multiple DC pulse currents of permanent magnetic chuck electric permanent magnetic controller output in magnetization process, and seek corresponding first standard deviation
For first DC pulse current；
In the case where the electric permanent-magnet suction disc adsorbs material, the electric permanent-magnet suction disc is obtained in magnetization process, it is described
Second DC pulse current of electric permanent magnetic controller output, comprising: in the case where the electric permanent-magnet suction disc adsorbs material, obtain
Multiple DC pulse currents of the electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, and seek corresponding second
Standard deviation is second DC pulse current.
Preferably, described in advance in the case where electric permanent-magnet suction disc is fully loaded, the electric permanent-magnet suction disc is obtained in magnetization process
The third DC pulse current of middle electricity permanent magnetic controller output, comprising:
In advance in the case where electric permanent-magnet suction disc is fully loaded, the electric permanent-magnet suction disc electric permanent magnetism control in magnetization process is obtained
Multiple DC pulse currents of device output, and seeking corresponding third standard deviation is the third DC pulse current.
Preferably, further includes:
It obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, when n different loads rate, the electric permanent magnetism
N DC pulse current of correspondence of sucker electric permanent magnetic controller output in magnetization process, n is the integer not less than 1；
Compare the size of second DC pulse current and the n DC pulse current；
According to comparison result, the material adsorption rate model of the corresponding electric permanent-magnet suction disc of second DC pulse current is determined
It encloses, the average airgap between the magnetic conductivity of absorbate material and/or the absorbate material and the electric permanent-magnet suction disc.
Preferably, it obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, when n different loads rate, institute
State n DC pulse current of correspondence of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, comprising:
It obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, in each different loads rate, the electricity
The multiple DC pulse currents of correspondence of permanent magnetic chuck electric permanent magnetic controller output in magnetization process, and seek corresponding n mark
Quasi- difference is the n DC pulse current.
Preferably, each DC pulse current takes the maximum value of corresponding DC pulse current.
Preferably, the maximum value for obtaining each DC pulse current includes:
M initial DC pulse maximum in a current lead-through period is successively obtained, m is the integer greater than 2；
Default processing is carried out to the m initial DC pulse maximum according to median filtering method, obtains result maximum value
For the maximum value of the DC pulse current.
Preferably, the m initial DC pulse maximum successively obtained in a current lead-through period, m are greater than 2
Integer, comprising:
First initial DC pulse maximum in a current lead-through period is obtained, and is cached；
Successively the subsequent current in the current lead-through period is acquired, and judges whether current DC pulse value is big
In the initial DC pulse maximum that upper one caches；
If so, current DC pulse value is cached, until m initial DC pulse maximum caching is completed.
A kind of electricity permanent magnetic controller, comprising: processor, drive module, trigger module and current sensor, the driving mould
Block input terminal is connected to the processor, and one end of the magnet exciting coil of the output end and electric permanent-magnet suction disc of the drive module connects
It connects；One end of the trigger module is connected to the processor, the other end of the trigger module and the current sensor
First end connection, the second end of the current sensor is connect with the other end of the magnet exciting coil of the electric permanent-magnet suction disc, described
The output end of current sensor is connected to the processor；
Wherein, the trigger module is used for according to the control signal of the processor and drive module cooperation control institute
That states electric permanent-magnet suction disc fills demagnetization；
The current sensor will test result and feed back to the processing for detecting corresponding DC pulse current
Device；
The processor is for responding operator's operation, and sending is corresponding to fill demagnetization control signal, and according to the electricity
The DC pulse current of flow sensor feedback judges the load condition of the electric permanent-magnet suction disc.
Compared with prior art, above-mentioned technical proposal has the advantage that
Electric permanent-magnet suction disc material provided by the embodiment of the present invention adsorbs detection method, comprising: in advance in electric permanent-magnet suction disc
In the case where zero load, the first DC pulse current of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process is obtained；?
In the case that electric permanent-magnet suction disc adsorbs material, electric permanent-magnet suction disc is obtained in magnetization process, the second of electric permanent magnetic controller output
DC pulse current；Judge whether the second DC pulse current is greater than the first DC pulse current；If so, determining that electric permanent magnetism is inhaled
Disk is adsorbed with load.Corresponding first DC pulse current when electric permanent-magnet suction disc zero load is obtained in advance, in this, as the mark of judgement
Standard obtains corresponding second DC pulse current, when second DC pulse current in the moment that electric permanent-magnet suction disc magnetizes every time
When greater than the first DC pulse current, determine that electric permanent-magnet suction disc is adsorbed with material at this time, otherwise determines that electric permanent-magnet suction disc is empty at this time
It carries, then can notify staff, lathe where electric permanent-magnet suction disc is out of service to be overhauled to control, and avoids no adsorbate
Material the case where still running appearance, while improving the safety of the operation of mechanical system where electric permanent-magnet suction disc.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is that electric permanent-magnet suction disc material provided by a kind of specific embodiment of the present invention adsorbs detection method flow chart；
Fig. 2 is the acquisition flow chart of the maximum value of DC pulse current provided by a kind of specific embodiment of the present invention；
Fig. 3 is electricity permanent magnetic controller structural schematic diagram provided by one embodiment of the present invention.
Specific embodiment
Core of the invention is to provide a kind of electric permanent magnetic controller and electric permanent-magnet suction disc material absorption detection method, can obtain
Electric permanent-magnet suction disc is known in adsorbed state when completing that magnetizes, to improve security performance.
It is understandable in order to enable the above objects, features and advantages of the present invention to become apparent, with reference to the accompanying drawing to this hair
Bright specific embodiment is described in detail.
Detail is elaborated in the following description to fully understand the present invention.But the present invention can with it is a variety of not
Other way described herein is same as to implement, those skilled in the art can do class without violating the connotation of the present invention
Like popularization.Therefore the present invention is not limited to the specific embodiments disclosed below.
Referring to FIG. 1, Fig. 1 is that electric permanent-magnet suction disc material provided by a kind of specific embodiment of the present invention adsorbs detection side
Method flow chart.
A kind of specific embodiment of the invention provides a kind of electric permanent-magnet suction disc material absorption detection method, comprising:
S11: in advance in the case where electric permanent-magnet suction disc zero load, electric permanent-magnet suction disc electric permanent magnetism control in magnetization process is obtained
First DC pulse current of device output.In the present embodiment, the first DC pulse current takes first DC pulse current
Maximum value.
S12: in the case where electric permanent-magnet suction disc adsorbs material, electric permanent-magnet suction disc is obtained in magnetization process, electric permanent magnet controlled
Second DC pulse current of device output processed.Second DC pulse current takes the maximum value of second DC pulse current.
S13: judge whether the second DC pulse current is greater than the first DC pulse current.Judge the second DC pulse
Whether the maximum value of stream is greater than the maximum value of the first DC pulse current.
S14: if so, determining that electric permanent-magnet suction disc is adsorbed with load.
Inventor (inhales the material that is adsorbed of different sizes the study found that in the magnetization process of electric permanent-magnet suction disc
When the necessary magnetic conduction of addendum material and identical magnetic property), under identical voltage drive, with becoming larger for support size, saturation current
It will increase.Therefore, corresponding first DC pulse current when electric permanent-magnet suction disc zero load is obtained in advance, in this, as zero load judgement
Standard obtains corresponding second DC pulse current, when second DC pulse in the moment that electric permanent-magnet suction disc magnetizes every time
When stream is greater than the first DC pulse current, determine that electric permanent-magnet suction disc is adsorbed with material at this time, otherwise determines electric permanent-magnet suction disc at this time
Zero load can then notify staff, and lathe where electric permanent-magnet suction disc is out of service to be overhauled to control, and avoids no absorption
The case where material is still run appearance, while improving the safety of the operation of mechanical system where electric permanent-magnet suction disc.
It should be noted that, in this document, what so-called DC pulse current referred to is all saturation current, such as above-mentioned first
What DC pulse current and the second DC pulse current referred to is exactly corresponding saturation current, and value judges for convenience, preferably
Each DC pulse current value is the maximum value of corresponding saturation current.
On the basis of the above embodiment, in one embodiment of the present invention, electric permanent-magnet suction disc material absorption detection
Method further include:
In advance in the case where electric permanent-magnet suction disc is fully loaded, it is defeated to obtain electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
Third DC pulse current out；
Judge whether the second DC pulse current is less than third DC pulse current；
If so, determining electric permanent-magnet suction disc underload.
It is identical as above embodiment principle, in the present embodiment, with the third DC pulse current under full load conditions
Corresponding second DC pulse current is obtained, when this in the moment that electric permanent-magnet suction disc magnetizes every time as fully loaded judgment criteria
When second DC pulse current is less than third DC pulse current, determine the adsorption rate of electric permanent-magnet suction disc at this time less than 100%, then
It can notify staff, whether normal be worked at this time with judgement, can control electric permanent magnetism if undercapacity belongs to abnormal conditions
Lathe where sucker is overhauled, and the safety of the operation of the mechanical system where electric permanent-magnet suction disc is further increased.
In one embodiment of the invention, in order to improve the accuracy of detection, unloaded in electric permanent-magnet suction disc in advance
In the case of, obtain the first DC pulse current of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, comprising: in advance
In the case where electric permanent-magnet suction disc zero load, multiple direct currents of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process are obtained
Pulse current, and seeking corresponding first standard deviation is the first DC pulse current；
In the case where electric permanent-magnet suction disc adsorbs material, electric permanent-magnet suction disc is obtained in magnetization process, electric permanent magnetic controller
Second DC pulse current of output, comprising: in the case where electric permanent-magnet suction disc adsorbs material, obtain electric permanent-magnet suction disc and magnetizing
Multiple DC pulse currents of electric permanent magnetic controller output in the process, and seeking corresponding second standard deviation is the second DC pulse
Electric current.
In advance in the case where electric permanent-magnet suction disc is fully loaded, it is defeated to obtain electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
Third DC pulse current out, comprising:
In advance in the case where electric permanent-magnet suction disc is fully loaded, it is defeated to obtain electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
Multiple DC pulse currents out, and seeking corresponding third standard deviation is third DC pulse current.
Accurately filtering is carried out by the maximum value to each DC pulse current and calculates acquisition, then passes through standard deviation pair
The degree that every group of data deviate midpoint is counted, and acquired results and unloaded, fully loaded standard deviation are compared, can be accurate
Reliably detect out sucker have it is non-loaded.
Further, on the basis of the above embodiment, in one embodiment of the present invention, the electric permanent-magnet suction disc object
Material absorption detection method further include:
It obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, when n different loads rate, electric permanent-magnet suction disc
N DC pulse current of correspondence of electric permanent magnetic controller output, n are the integer not less than 1 in magnetization process, wherein in advance
It obtains and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, when n different loads rate, electric permanent-magnet suction disc is in magnetization process
N DC pulse current of correspondence of electric permanent magnetic controller output, comprising: obtain in advance electric permanent-magnet suction disc load be less than be fully loaded with and
Greater than zero load, in each different loads rate, the correspondence of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process is multiple
DC pulse current, and seeking corresponding n standard deviation is n DC pulse current.
Compare the size of the second DC pulse current and n DC pulse current；
According to comparison result, material adsorption rate range, the quilt of the corresponding electric permanent-magnet suction disc of the second DC pulse current are determined
Inhale the average airgap between the magnetic conductivity and/or the absorbate material and the electric permanent-magnet suction disc of material.
In the present embodiment, electric permanent-magnet suction disc can be made to adsorb material with different adsorption rates in advance, i.e., will be set
The material of area is adsorbed on sucker, then obtains the corresponding DC pulse current of each adsorption rate, in this manner it is possible to forever according to electricity
The size relation of the second DC pulse current of magnetic-disc at runtime and the DC pulse current being obtained ahead of time, predicts at this time
Adsorption rate size.For example, in the present embodiment, with n=1, and adsorption rate is to be illustrated for 1/2 load.If second
DC pulse current is greater than DC pulse current when adsorption rate is 1/2 load, and is less than the third DC pulse of full load
Stream then judges that adsorption rate at this time is greater than 1/2 load, and is less than fully loaded.Certainly, the value of n is bigger, then it represents that preparatory obtained value is got over
More, adsorption rate when electric permanent-magnet suction disc is run determines that result is more accurate.
According to comparison result, the parameter for the absorbate material that can be judged has:
1: absorbate material covers the area of electric permanent-magnet suction disc, the size of comparison result energy linear response area coverage, and obtains
Specific percentages out.
2: the magnetic conductivity of absorbate material, it is assumed that under area coverage and other identical situations of factor for influencing magnetic flux, compare
As a result with the linear variation relation of the magnetic conductivity of absorbate material height.The higher absorbate material of magnetic conductivity, the effect to magnetize is also
More preferably, magnetic flux is higher, and it is also just higher to detect the numerical value compared.
3: average airgap between absorbate material and electric permanent-magnet suction disc (absorbate surface is more coarse or is uneven,
Average airgap is bigger).Average airgap is smaller, and the effect to magnetize is better, and it is also higher to detect the numerical value compared.That is the numerical value
Also with the linear variation relation of average airgap.
Therefore, the area coverage of the method energy comprehensive detection absorbate material in present embodiment, magnetic conductivity and average airgap,
It is namely equivalent to the magnetic flux rate after detection is magnetized, magnetic flux is higher, and the numerical value after detection relatively is higher, or even is truly linear
Variation relation.
Inventor is the study found that when electric permanent-magnet suction disc is without covering, i.e., when material adsorption rate is 0, electric permanent-magnet suction disc magnetizes
Induced voltage peak value size after induced voltage peak value is almost stablized with subsequent magnetic flux when triggering is identical；And completely cover lower triggering
When, induced voltage peak value is about twice of the induced voltage peak value after subsequent magnetic flux is stablized, is apparent from electric current by induced voltage shadow
It rings.
When the magnet exciting coil of electric permanent-magnet suction disc is current driven the magnetic field for generating and changing over time, it will in excitation wire
It encloses both ends and generates negative polarity in the calculation formula of the induced voltage e, e of excitation voltage are as follows:
Wherein, in formula λ be magnet exciting coil winding magnetic linkage, is defined as:SymbolIndicate the wink of time-varying magnetic flux
Duration, N are the number of turns.
Excitation voltage U and induced voltage e, exciting current I, the relationship of magnet exciting coil internal resistance R are as follows: U=e+I × R
The formula is converted, the relational expression of exciting current is obtained:
I=(U-e)/R
It brings e into above formula and obtains the relational expression between exciting current and magnetic linkage λ:
From the above equation, we can see that since the trigger voltage in each period of the thyristor of electric permanent magnetic controller is stable in U, excitation
Coil ignores the influence (only of short duration channel, temperature rise very little can be ignored the magnet exciting coil of electric permanent-magnet suction disc substantially) of temperature rise, interior
Hinder R be also constant, therefore really influence exciting current size be exactly magnetic linkage λ change rate.
Therefore, by electric permanent magnetic controller magnetize electric current precise acquisition and through above by DC pulse flow standard
The calculating of difference can reach simultaneously and be inhaled to what absorbate size and one, magnetic flux work accurately detected as a result, can also test out
Size of gaps between the magnetic conductivity and absorbate and magnetic-disc magnetic pole of object does one to the effect to magnetize in the moment magnetized
Comprehensive judgement.
On the basis of the respective embodiments described above, one embodiment of the present invention takes each DC pulse current corresponding straight
Obtaining value method when flowing the maximum value of pulse current has done specific description.
The maximum value for obtaining each DC pulse current includes: the m that successively obtains in a current lead-through period initial straight
Pulse maximum is flowed, m is the integer greater than 2；
Default processing is carried out to m initial DC pulse maximum according to median filtering method, obtaining result maximum value is to be somebody's turn to do
The maximum value of DC pulse current.
Wherein, m initial DC pulse maximum in a current lead-through period is successively obtained, m is whole greater than 2
Number, comprising:
First initial DC pulse maximum in a current lead-through period is obtained, and is cached；
Successively the subsequent current in the current lead-through period is acquired, and judges whether current DC pulse value is big
In the initial DC pulse maximum that upper one caches；
If so, current DC pulse value is cached, until m initial DC pulse maximum caching is completed.
Within a current lead-through period, a DC pulse peak value is acquired first as initial DC pulse maximum,
Then DC pulse current is ceaselessly acquired.Wherein, a kind of specific real-time mode of the present invention is by taking m=10 as an example to DC pulse
The acquisition detailed process of the maximum value of electric current is illustrated, and step is as shown in Figure 2:
S21: acquisition initial DC pulse current maximum value, and cached；
S22: acquisition DC pulse current；
S23: whether the DC pulse current that judgement currently acquires is greater than the DC pulse current maximum value of current cache；
S24: if so, being cached the DC pulse current as a DC pulse current maximum value, and return step
S23；
S25: if it is not, then judging whether is that the 10th caching compares completion；
S26: if the 10th caching compares completion, judging collected ADC, whether than the 10th caching is few by 30, wherein
So-called ADC refers to dac value, and 30 herein refer to the value of ADC, 12 30/4094*3.3/0.04, that is, electric currents
Difference, if after the completion of 10 caching acquisitions, then it represents that extreme value has been found, judges collected ADC whether than the 10th
Caching few 30 judges more than 30 when this threshold value, then is filtered that caching the 10th is all minimum values acquired.
S27: if it is not, then count is incremented for caching；
S28: if it is determined that than the 10th caching of collected ADC is few by 30, then the appearance counter that falls adds 1；
S29: if it is determined that unlike the 10th caching few 30 of collected ADC, the then appearance counter that falls clear 0；
S30: judging whether whereabouts appearance counter is greater than 20, that is, judges that 20 appearance are smaller than maximum value, if it is greater than
20 times, then it represents that it is real crossed peak value after electric current having dropped, at this time stop sampling, and handle 10 caching maximum values.
S31: if so, by the data cached averaged in 4 to the 7th, ground, result maximum value is obtained.
After obtaining result maximum value, various cachings only need to be reset, that is, complete the maximum value acquisition in this current cycle.
It is compared after obtaining result maximum value, then with the DC pulse current maximum value being obtained ahead of time, you can get it
Absorbate material covers the size of sucker and the size of absorbate magnetic flux.
DC pulse current maximum value when the electric permanent-magnet suction disc operation obtained by present embodiment is more accurate, also
The size of absorbate material covering sucker and the size of absorbate magnetic flux can more precisely be calculated.
Referring to FIG. 3, Fig. 3 is electricity permanent magnetic controller structural schematic diagram provided by one embodiment of the present invention.
Correspondingly, one embodiment of the present invention additionally provides a kind of electric permanent magnetic controller, comprising: processor 31, driving
Module 32, trigger module 33 and current sensor 34,32 input terminal of drive module are connect with processor 31, drive module 32 it is defeated
One end of the magnet exciting coil of outlet and electric permanent-magnet suction disc connects；One end of trigger module 33 is connect with processor 31, trigger module
33 other end is connected with the first end of current sensor 34, the second end of current sensor 34 and the excitation wire of electric permanent-magnet suction disc
The other end of circle connects, and the output end of current sensor 34 is connect with processor 31；Wherein, trigger module 33 is used for according to processing
Control signal and drive module 32 the cooperation control electric permanent-magnet suction disc of device 31 fill demagnetization；Current sensor 34 is for detecting correspondence
DC pulse current, and will test result and feed back to processor 31；Processor 31 is issued and is corresponded to for responding operator's operation
Fill demagnetization control signal, and the load shape of electric permanent-magnet suction disc is judged according to the DC pulse current that current sensor 34 is fed back
State.
As shown in figure 3, in the present embodiment, trigger module is adopted using a triggering ghyristor circuit, processor
It is STM32F103 single-chip microcontroller, the SCR+ contact for triggering ghyristor circuit is connect with the 9th pin of the single-chip microcontroller, and triggering can
Control silicon circuit the end A2 connect with the input pin 5 of current sensor A, current sensor A in the present embodiment using
The pin 4 of ASC756-50, current sensor A are one end of the magnet exciting coil of P-1 connection electric permanent-magnet suction disc, current sensor A's
The pin 11 of output terminals A D connection single-chip microcontroller；Drive module uses two relay circuits, the control for answer processor
Signal switches over work, to complete to fill demagnetization, wherein the pin 1 of the relay LS1 of the first relay circuit is P+1 connection
The other end of the magnet exciting coil of electric permanent-magnet suction disc, the pin 1 and triggering ghyristor circuit of the relay LS2 of the second relay circuit
The connection of the end A1, the input terminal of two relay circuits connect with the pin of single-chip microcontroller 33,34 respectively.
Processor issues control signal and carries out filling demagnetization to electric permanent-magnet suction disc to control drive module and trigger module, and electric
Flow sensor is then used to carry out the current acquisition in above-mentioned each method embodiment, and single-chip microcontroller can carry out correspondingly various meters
It calculates, judges the adsorbed state of electric permanent-magnet suction disc, wherein processor, which can have in existing single-chip microcontroller, believes the exchange of input
Number zero crossing detection function, can be according to realizing triggering to power device in the time set, according to changing angle of flow
Or external relay contact changes output current direction, fills the functions such as demagnetized state with change electric permanent-magnet suction disc.
It should be noted that present embodiment is preferably above-mentioned physical circuit, can also be had using other corresponding
The circuit of function is replaced, as long as filling demagnetization and the acquisition of electric current and correspondingly count to electric permanent-magnet suction disc can be completed
Judgement is calculated, present embodiment to this and without limitation, specifically depends on the circumstances.
In conclusion electricity permanent magnetic controller provided by the present invention and electric permanent-magnet suction disc material adsorb detection method, it can
Accurately it is whether unloaded and fully loaded in the process of running to go out electric permanent-magnet suction disc for interpretation, further, by operational process
The maximum value of DC pulse current carries out accurately filtering and calculates acquisition, and by standard deviation every group of data are deviateed with the degree at midpoint
It is counted, the standard deviation of result and each DC pulse current gathered in advance is compared, additionally it is possible to predict load
Magnet state, the size for being adsorbed material, absorbate magnetic conductivity and absorbate and magnetic-disc between air gap size.
A kind of electric permanent magnetic controller provided by the present invention and electric permanent-magnet suction disc material absorption detection method are carried out above
It is discussed in detail.Used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for art personnel, these change
It is also fallen within the protection scope of the claims of the present invention into modification.
Claims (9)
1. a kind of electric permanent-magnet suction disc material adsorbs detection method characterized by comprising
In advance in the case where electric permanent-magnet suction disc zero load, it is defeated to obtain the electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
The first DC pulse current out；
In the case where the electric permanent-magnet suction disc adsorbs material, the electric permanent-magnet suction disc is obtained in magnetization process, and the electricity is forever
Second DC pulse current of magnetic controller output；
Judge whether second DC pulse current is greater than first DC pulse current；
If so, determining that the electric permanent-magnet suction disc is adsorbed with load；
Further include: it obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, when n different loads rate, the electricity
N DC pulse current of correspondence of permanent magnetic chuck electric permanent magnetic controller output in magnetization process, n is the integer not less than 1；
Compare the size of second DC pulse current and the n DC pulse current；
According to comparison result, material adsorption rate range, the quilt of the corresponding electric permanent-magnet suction disc of second DC pulse current are determined
Inhale the average airgap between the magnetic conductivity and/or the absorbate material and the electric permanent-magnet suction disc of material.
2. the method according to claim 1, wherein further include:
In advance in the case where electric permanent-magnet suction disc is fully loaded, it is defeated to obtain the electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
Third DC pulse current out；
Judge whether second DC pulse current is less than the third DC pulse current；
If so, determining the electric permanent-magnet suction disc underload.
3. according to the method described in claim 2, it is characterized in that, obtaining institute in the case where electric permanent-magnet suction disc zero load in advance
State the first DC pulse current of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, comprising: in advance in electric permanent magnetism
In the case that sucker is unloaded, multiple DC pulses of the electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process are obtained
Electric current, and seeking corresponding first standard deviation is first DC pulse current；
In the case where the electric permanent-magnet suction disc adsorbs material, the electric permanent-magnet suction disc is obtained in magnetization process, and the electricity is forever
Second DC pulse current of magnetic controller output, comprising: in the case where the electric permanent-magnet suction disc adsorbs material, described in acquisition
Multiple DC pulse currents of electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, and seek corresponding second standard
Difference is second DC pulse current.
4. according to the method described in claim 3, obtaining it is characterized in that, described in advance in the case where electric permanent-magnet suction disc is fully loaded
Take the third DC pulse current of the electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process, comprising:
In advance in the case where electric permanent-magnet suction disc is fully loaded, it is defeated to obtain the electric permanent-magnet suction disc electric permanent magnetic controller in magnetization process
Multiple DC pulse currents out, and seeking corresponding third standard deviation is the third DC pulse current.
5. according to the method described in claim 4, it is characterized in that, being obtained in advance in electric permanent-magnet suction disc load less than fully loaded and big
When zero load, n different loads rate, correspondence n of the electric permanent-magnet suction disc electric permanent magnetic controller output in magnetization process is directly
Flow pulse current, comprising:
It obtains in advance and is less than fully loaded in electric permanent-magnet suction disc load and is greater than zero load, in each different loads rate, the electricity permanent magnetism
The multiple DC pulse currents of correspondence of sucker electric permanent magnetic controller output in magnetization process, and seek corresponding n standard deviation
For the n DC pulse current.
6. method according to any one of claims 1 to 5, which is characterized in that each DC pulse current takes corresponding direct current
The maximum value of pulse current.
7. according to the method described in claim 6, it is characterized in that, the maximum value for obtaining each DC pulse current includes:
M initial DC pulse maximum in a current lead-through period is successively obtained, m is the integer greater than 2；
Default processing is carried out to the m initial DC pulse maximum according to median filtering method, obtaining result maximum value is to be somebody's turn to do
The maximum value of DC pulse current.
8. the method according to the description of claim 7 is characterized in that m successively obtained in a current lead-through period
Initial DC pulse maximum, m are the integer greater than 2, comprising:
First initial DC pulse maximum in a current lead-through period is obtained, and is cached；
Successively the subsequent current in the current lead-through period is acquired, and judges whether current DC pulse value is greater than
The initial DC pulse maximum of one caching；
If so, current DC pulse value is cached, until m initial DC pulse maximum caching is completed.
9. a kind of electricity permanent magnetic controller characterized by comprising processor, drive module, trigger module and current sensor,
The drive module input terminal is connected to the processor, the output end of the drive module and the magnet exciting coil of electric permanent-magnet suction disc
One end connection；One end of the trigger module is connected to the processor, the other end of the trigger module and the electric current
The first end of sensor connects, and the other end of the magnet exciting coil of the second end of the current sensor and the electric permanent-magnet suction disc connects
It connects, the output end of the current sensor is connected to the processor；
Wherein, the trigger module is used to control the electricity according to the control signal of the processor and drive module cooperation
Permanent magnetic chuck fills demagnetization；
The current sensor will test result and feed back to the processor for detecting corresponding DC pulse current；
For the processor for responding operator's operation, sending is corresponding to fill demagnetization control signal, and is passed according to the electric current
The DC pulse current of sensor feedback judges the load condition of the electric permanent-magnet suction disc.
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| CN201610498239.5A CN107091946B (en) | 2016-06-29 | 2016-06-29 | It is a kind of electricity permanent magnetic controller and electric permanent-magnet suction disc material adsorb detection method |
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| CN201610498239.5A CN107091946B (en) | 2016-06-29 | 2016-06-29 | It is a kind of electricity permanent magnetic controller and electric permanent-magnet suction disc material adsorb detection method |
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| CN107091946B true CN107091946B (en) | 2019-09-27 |
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| CN107091946A (en) | 2017-08-25 |
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