CN205538817U - Detection apparatus for magnetism barkhausen noise signal and magnetism parameter - Google Patents
Detection apparatus for magnetism barkhausen noise signal and magnetism parameter Download PDFInfo
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- CN205538817U CN205538817U CN201620087813.3U CN201620087813U CN205538817U CN 205538817 U CN205538817 U CN 205538817U CN 201620087813 U CN201620087813 U CN 201620087813U CN 205538817 U CN205538817 U CN 205538817U
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Abstract
The utility model discloses a detection apparatus for magnetism barkhausen noise signal and magnetism parameter. Wherein, the device includes: the magnetism part constitutes closed magnetic circuit with the unit under test, the first signal generates the part, is connected with the magnetism part for generate target drive signal, wherein, the signal of target drive signal for being arranged in forming the field circuit at closed magnetic circuit, the 2nd signal generation parts are connected with magnetism parts electricity for according to field circuit formation sensing signal, wherein, sensing signal is used for confirming the magnetism parameter of unit under test, the signal detection part is connected with the unit under test electricity for detect the magnetism barkhausen noise signal of unit under test in the field circuit. The utility model provides an among the prior art single measurement ferromagnetic material's parameter lead to the technical problem of aassessment ferromagnetic material's that can not the be better damage condition.
Description
Technical field
The utility model relates to detection field, in particular to a kind of Magnetic Barkhausen noise signal and magnetic parameter
Detection device.
Background technology
Ferrimagnet is widely used in engineering, such as railway, large-scale stadium, boiler, pressure vessel, pressure
The main bodys such as pipeline, hoisting machinery, passenger aerial ropeway, large-scale recreation facility and large bridge are by ferrimagnet structure group
Becoming, they are the development of the national economy and the important infrastructure of people's life.These steel constructions are in the mistake manufactured, be on active service
Cheng Zhong, often needs its defect, stress, fatigue, creep equivalent damage are carried out Non-Destructive Testing, with carry out quality control and
Safety evaluation.Magnetism of material parameter (such as coercivity, residual magnetization and magnetic conductivity etc.) and magnetic Barkhausen is used to make an uproar
Acoustical signal can assess the above-mentioned damage of ferromagnetic material.
At present, in terms of magnetism of material parameter measurement, include than more typical achievement in research: " utilizing pulse electromagnetic
The device of field measurement ferromagnetic material internal stress " in, by measuring magnetization curve and hysteresis curve, demarcate measurement material
Internal stress, but it can not measure Magnetic Barkhausen noise signal." the coercivity performance judgment device of coercivity profile magnet "
It is mainly used in judging the coercivity whether each position of a coercivity profile magnet has more than required coercivity,
It is mainly used in the distribution magnet detection of motor, and in its frame for movement, accommodating measurand is " substantially C-shaped " magnetic
Gonosome, measurand can only be put in the vacancy position of " substantially C-shaped ", be unfavorable for measuring by it when measuring；" iron
The measurement apparatus of magnetic material hysteresis loop line and application process thereof " main employing digital circuit stored program control system solution Scientific Research in University Laboratory
The problem of the Hysteresisgraph device rapid wear of the Manual mechanical switch of use, knob etc.；" magnetic measuring device " is main
For measuring coercivity and the coercivity profile of the tiny area of the magnetic sample of lamellar and tool high-coercive force, it is main
Permanent magnet used by motor to be used for is measured；" the experiment side of a kind of digital storage oscilloscope observation AC Hysteresis Loop
Method " use digital storage oscilloscope observation AC Hysteresis Loop, it still needs to measurand is made closed circular, to not
Have difficulties with parts detection；" a kind of system measuring magnetic material coercivity size " though simple in construction, automation journey
Degree height, but still need to be placed in solenoid measurand, to different parts detection inconvenience, piece volumes and shape are had
Requirement.
To sum up, in terms of magnetic parameter measurement, the development level of detecting instrument of the prior art also ratio is relatively low, practical
The ferrimagnet forever that novel instrument also uses mainly for motor, and it is not directed to the general inspection of different structure parts
Survey instrument, more weak to the detection level of different structure workpiece.In terms of single Magnetic Barkhausen noise signal measurement, adopt
With the sensor of U-shaped magnetic yoke structure, the measurement of parts is yielded good result, but for different parts, its operating mode
Complexity, during detection, uses single detection method to be difficult to its defect, stress, fatigue, creep equivalent damage and is evaluated.
And the experimental system that foreign scholar builds can measure magnetic barkhausen signal and magnetic parameter, the most do not develop correspondence
Instrument, therefore, active demand is a kind of can be comprehensively evaluated component defect, stress, fatigue, creep equivalent damage
Instrument.
For above-mentioned problem, effective solution is the most not yet proposed.
Utility model content
The utility model embodiment provides the detection device of a kind of Magnetic Barkhausen noise signal and magnetic parameter, so that
Solve the parameter of single-measurement ferrimagnet in prior art less and cause the damage that can not preferably assess ferrimagnet
The technical problem of situation.
An aspect according to the utility model embodiment, it is provided that the detection device of a kind of ferrimagnet, including:
Magnet assembly, constitutes closed magnetic circuit with unit under test；First signal generating unit, is connected with described magnet assembly, is used for
Generating target excitation signal, wherein, described target excitation signal is for for forming field circuit in described closed magnetic circuit
Signal；Secondary signal generating unit, electrically connects with described magnet assembly, for generating sensing according to described field circuit
Signal, wherein, described induced signal is for determining the magnetic parameter of described unit under test；Signal detecting part, with institute
State unit under test electrical connection, for detecting the Magnetic Barkhausen noise signal of described unit under test in described field circuit.
Further, described detection device also includes: magnetic field generating unit, is electrically connected with described first signal generating unit
Connect, for forming described field circuit according to the described target excitation signal received at described closed magnetic circuit, and produce
Exciting current.
Further, described detection device also includes: data acquisition unit, respectively with described secondary signal generating unit
The output electrical connection of output and described first signal generating unit, is used for gathering at least one signal following: described
Target excitation signal, described exciting current, described induced signal and described Magnetic Barkhausen noise signal.
Further, described detection device also includes: host computer, electrically connects with described data acquisition unit, for institute
State target excitation signal, described exciting current, described induced signal and described Magnetic Barkhausen noise signal to be analyzed,
Obtain described magnetic parameter.
Further, described detection device also includes: power amplifier, is connected to described magnetic field generating unit and described
Between first signal generating unit, for described target excitation signal is amplified.
Further, described detection device also includes: current sensor, respectively with the output of described power amplifier
It is connected with the input of described data acquisition unit, is used for detecting described exciting current.
Further, described detection device also includes: preamplifier, electrically connects with described signal detecting part, uses
It is amplified in the described Magnetic Barkhausen noise signal that described signal detecting part is received.
Further, described detection device also includes: wave filter, respectively with described preamplifier and described data acquisition
Storage electrically connects, for being filtered the described Magnetic Barkhausen noise signal detected.
In the utility model embodiment, magnet assembly, constitute closed magnetic circuit with unit under test；First signal generating unit,
Being connected with described magnet assembly, be used for generating target excitation signal, wherein, described target excitation signal is for in institute
State the signal forming field circuit in closed magnetic circuit；Secondary signal generating unit, electrically connects with described magnet assembly, is used for
Generating induced signal according to described field circuit, wherein, described induced signal is for determining the magnetic of described unit under test
Parameter；Signal detecting part, electrically connects with described unit under test, described tested for detecting in described field circuit
The mode of the Magnetic Barkhausen noise signal of parts, the target excitation signal generated by the first signal generating unit is being closed
Close and loop is formed field circuit, and then secondary signal generating unit generates induced signal in field circuit, and according to
This induced signal determines the magnetic parameter of unit under test, meanwhile, detects quilt by signal detecting part in field circuit
Survey the Magnetic Barkhausen noise signal of parts, relative in prior art, be only capable of individually detecting unit under test magnetic parameter
Or individually detection Magnetic Barkhausen noise signal, has reached to detect the purpose of unit under test many kinds of parameters, thus has realized
Detect magnetic parameter and the technique effect of Magnetic Barkhausen noise signal of unit under test simultaneously, and then solve existing
In technology, the parameter of single-measurement ferrimagnet causes the technology that can not preferably assess the degree of impairment of ferrimagnet
Problem.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes the part of the application,
Schematic description and description of the present utility model is used for explaining the utility model, is not intended that of the present utility model
Improper restriction.In the accompanying drawings:
Fig. 1 is a kind of Magnetic Barkhausen noise signal according to the utility model embodiment and the detection device of magnetic parameter
Schematic diagram；
Fig. 2 is a kind of signal of Magnetic Barkhausen noise alternatively according to the utility model embodiment and the inspection of magnetic parameter
Survey the schematic diagram of device；
Fig. 3 is the oscillogram of the target excitation signal according to the utility model embodiment；
Fig. 4 is the schematic diagram of a kind of magnetization curve according to the utility model embodiment；
Fig. 5 is the schematic diagram of a kind of hysteresis curve according to the utility model embodiment；
Fig. 6 is the schematic diagram of a kind of permeability curcve according to the utility model embodiment；
Fig. 7 is the schematic diagram of a kind of remanent magnetism curve according to the utility model embodiment；And
Fig. 8 is the oscillogram of the Magnetic Barkhausen noise signal according to the utility model embodiment.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the utility model scheme, real below in conjunction with the utility model
Execute the accompanying drawing in example, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that institute
The embodiment described is only the embodiment of the utility model part rather than whole embodiments.Based on this practicality
Embodiment in novel, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, all should belong to the scope of the utility model protection.
It should be noted that term " first " in specification and claims of the present utility model and above-mentioned accompanying drawing,
" second " etc. are for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that
The data so used can be exchanged in the appropriate case, in order to embodiment of the present utility model described herein can be with
Order in addition to those here illustrating or describing is implemented.Additionally, term " includes " and " having " and they
Any deformation, it is intended that cover non-exclusive comprising, such as, contain series of steps or the process of unit,
Method, system, product or equipment are not necessarily limited to those steps or the unit clearly listed, but can include the most clear
That list to Chu or for intrinsic other step of these processes, method, product or equipment or unit.
According to the utility model embodiment, it is provided that a kind of Magnetic Barkhausen noise signal and the detection device of magnetic parameter
Embodiment.
Fig. 1 is a kind of Magnetic Barkhausen noise signal according to the utility model embodiment and the detection device of magnetic parameter
Schematic diagram, as it is shown in figure 1, this detection device includes:
Magnet assembly 10, constitutes closed magnetic circuit with unit under test.
In the utility model embodiment, magnet assembly is preferably uses high-permeability material (such as, silicon steel sheet) to make
U-shaped yoke.When magnet assembly is chosen for U-shaped yoke, magnet assembly 10 and unit under test 120 constitute a closed magnetic
Road, wherein, unit under test is the parts constituted with ferrimagnet.
First signal generating unit 20, is connected with magnet assembly, is used for generating target excitation signal, and wherein, target swashs
Encouraging signal is the signal for forming field circuit in closed magnetic circuit.
First signal generating unit is properly termed as again function generator, for forming the mesh of field circuit in closed magnetic circuit
Mark pumping signal, target excitation signal can have a variety of, and in the utility model embodiment, target excitation signal can
Think sine wave or triangular wave, it is also possible to be other waveforms.
Secondary signal generating unit 30, electrically connects with magnet assembly, is used for according to field circuit generation induced signal, wherein,
Induced signal is for determining the magnetic parameter of unit under test.
Secondary signal generating unit can have a variety of, in the utility model embodiment, as preferably, and secondary signal
Generating unit can be chosen for induction coil, and wherein, induction coil is wound on magnet assembly, and the number of turn of induction coil is
Multiturn, and, the wire (such as, copper wire) that induction coil uses can be single cord, it is also possible to be stranded conductor.
Signal detecting part 40, electrically connects with unit under test, for detecting the magnetic Bark of unit under test in field circuit
The gloomy noise signal of person of outstanding talent.
In the utility model embodiment, Magnetic Barkhausen noise signal and magnetic parameter all may determine that unit under test damages
Hinder degree, specifically, can by Magnetic Barkhausen noise signal and magnetic parameter determine unit under test stress,
Creep and tired situation, and then determine the degree of impairment of unit under test.
In the utility model embodiment, by the target excitation signal of the first signal generating unit generation in closed-loop path
Middle formation field circuit, and then secondary signal generating unit generates induced signal in field circuit, and according to this sensing
Signal determines the magnetic parameter of unit under test, meanwhile, detects unit under test by signal detecting part in field circuit
Magnetic Barkhausen noise signal, relative in prior art, be only capable of individually detecting unit under test magnetic parameter or list
Solely detection Magnetic Barkhausen noise signal, has reached to detect the purpose of unit under test many kinds of parameters, it is achieved thereby that simultaneously
The magnetic parameter of detection unit under test and the technique effect of Magnetic Barkhausen noise signal, and then solve in prior art
The parameter of single-measurement ferrimagnet causes the technical problem that can not preferably assess the degree of impairment of ferrimagnet.
Alternatively, detection device also includes: magnetic field generating unit 50, electrically connects with the first signal generating apparatus, is used for
Form field circuit according to the target excitation signal received at closed magnetic circuit, and produce exciting current.
Specifically, magnetic field generating unit has a variety of, and in the utility model embodiment, magnetic field generating unit can be
Magnet exciting coil, this magnet exciting coil can be wrapped in the coiling position, optional position on magnet assembly 10 (such as, U-shaped yoke)
Put, and this magnet exciting coil can be single turn, it is also possible to for multiturn, wherein, the wire that magnet exciting coil uses is (such as,
Copper wire) can be sub-thread, it is also possible to it is multi cord.When the first signal generating unit generates target excitation signal, this mesh
Mark pumping signal is by this magnetic field generating unit of excitation (such as, excitation coil), and then the magnetic field inspired will be at magnet assembly
The closed magnetic circuit of (such as, U-shaped yoke) and unit under test composition forms field circuit, and in magnetic field generating unit
Part (such as, excitation coil) produces exciting current.
After forming field circuit, the secondary signal generating unit electrically connected with magnet assembly (such as, U-shaped yoke)
Induced signal, such as induced voltage and induced-current will be produced, for determining the magnetic parameter of unit under test.
Alternatively, detection device also includes: data acquisition unit 60, respectively with the output of secondary signal generating unit and
The output electrical connection of the first signal generating apparatus, is used for gathering at least one signal following: target excitation signal, encourage
Magnetoelectricity stream, the induced signal of magnetic coil and Magnetic Barkhausen noise signal.
Specifically, in the utility model embodiment, data acquisition unit can be chosen for multichannel collecting device, for complete
Become the induced signal of target excitation signal, secondary signal generating unit generation, Magnetic Barkhausen noise signal, and will adopt
Collect to signal be sent to upper computer software.Therefore, it can choose number of channels be more than and be equal to the data acquisition of 3
Device, as preferably, the sampling precision of the data acquisition unit chosen is more than 12, and sample frequency is more than or equal to 10Mbyte.
Alternatively, detection device also includes: power amplifier 80, is connected to magnetic field generating unit and the first signal generates
Between parts, for target excitation signal is amplified.
In the utility model embodiment, it is also possible at magnetic field generating unit (such as, magnet exciting coil) and the first signal
Power amplifier is connected, for the target excitation signal that the first signal generating unit produces being put between generating unit
Greatly, the energy excitation coil enabling the target excitation signal after amplification normally works.Power amplifier can have
A variety of, specifically, optional power amplifier of choosing is linear amplifier, it is also possible to choosing power amplifier is other
Type amplifier, completes the amplification to pumping signal, and ensures the undistorted of signal.
Specifically, it is 0～40dB adjustable for can arranging the multiplication factor of power amplifier, carries a width of: direct current～2KHz,
Wherein, the multiplication factor of power amplifier can be adjusted by host computer.
Alternatively, detection device also includes: current sensor 130, respectively with the output of power amplifier and described
The input of data acquisition unit is connected, and is used for detecting exciting current.
Specifically, as it is shown in figure 1, current sensor can be connected between power amplifier and data acquisition unit, use
In detection exciting current, the exciting current detected just is transmitted by data acquisition unit to host computer and be analyzed, its
In, in the utility model embodiment, exciting current is for analyzing the induction of field circuit；Excitation can also be given
The external galvanometer of coil, for detecting exciting current in real time, and then, according to the exciting current analysis of magnetic detected
Property parameter.
Alternatively, detection device also includes: preamplifier 90, electrically connects with signal detecting part, for signal
The Magnetic Barkhausen noise signal that detection device receives is amplified.
Specifically, owing to Magnetic Barkhausen noise signal is millivolt level signal, therefore, original magnetic Barkhausen need to be made an uproar
Acoustical signal is amplified to lie prostrate level.In the utility model embodiment, the multiplication factor of preamplifier is preferably 40～60dB.
Preamplifier is connected to signal detecting part, for Magnetic Barkhausen noise signal is amplified, in order to data
Collector can collect Magnetic Barkhausen noise signal.
Alternatively, signal detecting part includes: spiral winding, electrically connects with preamplifier, wherein, when in Guan Bi
When magnetic circuit forms field circuit, determine that the induced signal of the generation in spiral winding is Magnetic Barkhausen noise signal；
Magnetic core, is arranged at the center of spiral winding, for strengthening the magnetic field intensity of spiral winding.
In the utility model embodiment, signal detecting part can be described as again Magnetic Barkhausen noise signal receiver, should
Signal supervisory instrument is made up of the spiral winding of wire coiling, in order to strengthen its induced field size, and can be at spiral winding
Magnetic core is placed at middle part, and wherein, magnetic core can select high-permeability material (such as, silicon steel).
Alternatively, detection device also includes: wave filter 110, electrically connects with preamplifier and data acquisition unit respectively,
For the Magnetic Barkhausen noise signal detected is filtered.
If it should be noted that do not use wave filter that Magnetic Barkhausen noise signal is filtered, then can be by preposition
Magnetic Barkhausen noise signal after amplifier amplifies directly sends into host computer, then upper after data acquisition unit gathers
Magnetic Barkhausen noise signal is filtered by position machine.
Specifically, can be to arrange wave filter between preamplifier and data acquisition unit, for the magnetic Bark person of outstanding talent amplified
Gloomy noise signal is filtered.In the utility model embodiment, wave filter can be chosen for low pass filter, and arranges
The cut-off frequency of low pass filter is 1KHz.
Alternatively, detection device also includes: host computer 70, electrically connects with data acquisition unit, for believing target excitation
Number, the induced signal of exciting current, magnetic coil and Magnetic Barkhausen noise signal be analyzed, obtain magnetic parameter.
It should be noted that detect in device at above-mentioned Magnetic Barkhausen noise signal and magnetic parameter, magnet assembly 10
Can select and can select as induction coil, signal detecting part 40 for U-shaped yoke, secondary signal generating unit 30
Spiral winding and the Magnetic Barkhausen noise signal of magnetic core composition can be selected.
As in figure 2 it is shown, above-mentioned magnet assembly 10, secondary signal generating unit 30, signal detecting part 40 and magnetic field are raw
Becoming parts 50 to be properly termed as again sensor, this sensor is used for detecting Magnetic Barkhausen noise signal and magnetic parameter, and
This sensor electrically connects with power amplifier, and wherein, the magnetic field generating unit 50 in this sensor is used for receiving excitation letter
Number and excite magnetic field, formed field circuit, and by secondary signal generating unit 30 according to field circuit generate sensing letter
Number, receive magnetic barkhausen signal by signal detecting part 40 simultaneously.This sensor also includes that pumping signal input connects
Mouth, the output interface of magnetic parameter signal and the output interface of Magnetic Barkhausen noise signal, respectively with power amplifier
Output, data acquisition unit, wave filter are electrically connected.
As in figure 2 it is shown, the unit under test 120 not showing magnetic is put in magnetic field, new for this practicality
The detection device of type embodiment, when measuring the magnetic parameter of unit under test 120, can be by magnet assembly in this detection device
10 (such as, U-shaped yoke) fit tightly with unit under test 120 surface, wherein, access the quilt in this field circuit
Survey a length of L2 of parts, access a length of L1 of magnet assembly in this field circuit.When the first signal generating unit
Excitation field generating unit 50 is (such as, to produce successive objective pumping signal (such as, sinusoidal signal or other signals)
Magnet exciting coil) formed closed magnetic field loop time, by this detection measurement device within the period 1 of target excitation signal
The U2 of magnetic coil 30 (such as, induction coil) both end voltage, and then, by can be calculated B-H magnetization song
Line.By separated in time, when induced field is reduced to zero, again produce a cycle Sine wave, and so forth,
Can repetitive measurement magnetization curve.
In the utility model embodiment, as it is shown in figure 1, use data wire by the first signal generating unit 20, power
Amplifier 80 is connected with host computer 70, makes host computer 70 can control putting of target excitation waveform and power amplifier 80
Big multiple, the output of the first signal generating unit 20 is connected with the input of power amplifier 80, and power is put
The output of big device 80 is connected with this magnet exciting coil 50, the Magnetic Barkhausen noise signal receiver of this detection device
The spiral winding of 40 is connected with preamplifier 90, and preamplifier 90 is connected with wave filter 110, finally, and target
Pumping signal, the induced signal of induction coil, Magnetic Barkhausen noise signal enter host computer through data acquisition unit.
In the utility model embodiment, magnetic parameter includes: magnetization curve, hysteresis curve, coercivity, magnetic conductivity
Curve, remanent magnetism curve, it is also possible to measure Magnetic Barkhausen noise signal etc., by above-mentioned magnetic parameter and magnetic Bark person of outstanding talent
Gloomy noise signal can be with the defect of overall merit unit under test, stress, fatigue, creep equivalent damage degree.Below with regard to magnetic
The analysis method of property parameter is introduced.
Curve as shown in Figure 3 is the target excitation signal (sinusoidal signal) oscillogram within a cycle, in this reality
With in new embodiment, according to 1/4 cycle portions (that is, Fig. 3 before the sinusoidal signal that the first signal generating apparatus produces
Middle S1) obtain magnetization curve.The magnetization curve obtained according to 1/4 cycle portions before sinusoidal signal as shown in Figure 4,
Transverse axis is magnetic field intensity H, and the longitudinal axis is induced field strength B, when magnetic field intensity H is gradually increased from zero, in unit under test
Induced field strength B is also gradually increased to saturated, and this process B is magnetization curve with the curve that H changes.
It is assumed that the number of turn of magnet exciting coil is N1Circle, the number of turn of induction coil is N2Circle, as in figure 2 it is shown, tested portion
The part a length of L2 in closed magnetic circuit, the U-shaped yoke a length of L1 in closed magnetic circuit.If at magnet exciting coil N1In
By exciting current I1Time, this exciting current produces magnetic field in the closed magnetic circuit that U-shaped yoke and unit under test form,
According to Ampere circuit law H (L1+L2)=N1·I1, calculating understands the size of magnetic field intensity H and is:
Utilize the magnitude of voltage U at the target resistance two ends detected2, by following formula calculating induced field strength size:Wherein, k is proportionality coefficient.
Fig. 5 is the hysteresis curve of unit under test.When being in 1/4 cycle before target excitation signal, as it is shown in figure 5,
Induced field strength is the change of " 0a " direction along Fig. 5, is gradually increased to H in magnetic field intensity HmAfter, gradually decrease to-Hm
During, induced field strength B will not change along magnetization curve " 0a " direction, but change along " abcd " direction；
In magnetic field intensity by-HmIt is further added by HmDuring, induced field strength B will change along " defa " direction, this rule
Curve is referred to as hysteresis curve.Wherein, when magnetic field intensity H=0, induced field strength is Br, and BrValue be not zero, its
In, BrResidual induction for unit under test；As B=0, magnetic field intensity now is He, wherein, HeFor
The coercivity of unit under test.
In the utility model embodiment, changed with H by detection target excitation signal B within front 1/4 cycle
Curve (that is, B-H loop), can obtain coercivity H from this hysteresis curveeSize and residual induction Br
Size.
By the detection device of the ferrimagnet that the utility model provides, it is also possible to the magnetic conductivity of detection unit under test,
Specifically, the permeability curcve of unit under test is as shown in Figure 6.Wherein, the computing formula of magnetic conductivity is: μ=B/H,
Wherein, μ is the magnetic conductivity of unit under test.Therefore, by the slope of the magnetization curve B-H that calculating detects,
Obtaining the magnetic conductivity of unit under test, wherein, the permeability curcve of unit under test is as shown in Figure 6.
By the detection device of the ferrimagnet that the utility model provides, it is also possible to the remanent magnetism curve of detection unit under test,
Wherein, remanent magnetism curve is remanent induction field intensity BrCurve with magnetic field intensity H.Therefore, when measuring remanent magnetism curve,
The amplitude of target excitation signal, and repetitive measurement hysteresis curve need to be varied multiple times, and then obtain remanent magnetism as shown in Figure 7
Curve Br-H。
By the detection device of the ferrimagnet that the utility model provides, it is also possible to the magnetic Bark person of outstanding talent of detection unit under test
Gloomy noise signal.When the first signal generating unit produces continually varying sinusoidal signal or other signals, at magnetic Bark
To produce signal in the spiral winding of the gloomy noise signal receiver of person of outstanding talent, wherein, this signal is Magnetic Barkhausen noise letter
Number.After the Magnetic Barkhausen noise signal collected is amplified by preamplifier, then by after filter filtering,
Send into data acquisition unit and obtain the oscillogram of Magnetic Barkhausen noise signal.In fig. 8, when pumping signal (that is, mesh
Mark pumping signal) when being sinusoidal signal, the waveform such as Fig. 8 of the Magnetic Barkhausen noise signal detected " receives and believes
Number " shown in waveform.
The detection device of the ferrimagnet that the utility model provides, when detecting magnetic parameter, this detection device is tight
Fit in the surface of tested parts, and pre-set power amplifier multiplication factor.By the first signal generating unit
When producing target excitation signal, after being amplified target excitation signal via power amplifier, excitation coil exists
The closed magnetic circuit that U-shaped yoke and unit under test are constituted forms field circuit.After producing field circuit, magnetic coil
(such as induction coil) will produce induced signal (such as induced voltage and induced-current), the excitation electricity in magnet exciting coil
The induced voltage of stream and induction coil, after data acquisition unit gathers, enters host computer, and then by upper computer software
It is analyzed processing, analyzes and obtain magnetic parameter.And signal detecting part (such as, Magnetic Barkhausen noise signal connects
Receive device) after the Magnetic Barkhausen noise signal that received amplifies via preamplifier, wave filter can be used to be filtered,
Sending host computer to through data acquisition unit collection, last upper computer software completes to gather the process of signal and to parts
Comprehensive Assessment.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from the utility model principle, it is also possible to make some improvements and modifications, these
Improvements and modifications also should be regarded as protection domain of the present utility model.
Claims (8)
1. a Magnetic Barkhausen noise signal and the detection device of magnetic parameter, it is characterised in that including:
Magnet assembly, constitutes closed magnetic circuit with unit under test；
First signal generating unit, is connected with described magnet assembly, is used for generating target excitation signal, wherein,
Described target excitation signal is the signal for forming field circuit in described closed magnetic circuit；
Secondary signal generating unit, electrically connects with described magnet assembly, for generating sensing according to described field circuit
Signal, wherein, described induced signal is for determining the magnetic parameter of described unit under test；
Signal detecting part, electrically connects with described unit under test, for detecting described quilt in described field circuit
Survey the Magnetic Barkhausen noise signal of parts.
Detection device the most according to claim 1, it is characterised in that described detection device also includes:
Magnetic field generating unit, electrically connects with described first signal generating unit, for according to the described mesh received
Mark pumping signal forms described field circuit at described closed magnetic circuit, and produces exciting current.
Detection device the most according to claim 2, it is characterised in that described detection device also includes:
Data acquisition unit, respectively with the output of described secondary signal generating unit and described first signal generating unit
The output electrical connection of part, is used for gathering at least one signal following: described target excitation signal, described excitation
Electric current, described induced signal and described Magnetic Barkhausen noise signal.
Detection device the most according to claim 3, it is characterised in that described detection device also includes:
Host computer, electrically connects with described data acquisition unit, for described target excitation signal, described excitation electricity
Stream, described induced signal and described Magnetic Barkhausen noise signal are analyzed, and obtain described magnetic parameter.
Detection device the most according to claim 3, it is characterised in that described detection device also includes:
Power amplifier, is connected between described magnetic field generating unit and described first signal generating unit, is used for
Described target excitation signal is amplified.
Detection device the most according to claim 5, it is characterised in that described detection device also includes:
Current sensor, respectively with the input phase of the output of described power amplifier and described data acquisition unit
Connect, be used for detecting described exciting current.
Detection device the most according to claim 3, it is characterised in that described detection device also includes:
Preamplifier, electrically connects with described signal detecting part, for receiving described signal detecting part
Described Magnetic Barkhausen noise signal be amplified.
Detection device the most according to claim 7, it is characterised in that described detection device also includes:
Wave filter, electrically connect with described preamplifier and described data acquisition unit respectively, for detecting
Described Magnetic Barkhausen noise signal is filtered.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105717191A (en) * | 2016-01-28 | 2016-06-29 | 中国特种设备检测研究院 | Detection method and device for magnetic Barkhausen noise signal and magnetic parameters |
| CN111257407A (en) * | 2020-03-08 | 2020-06-09 | 北京工业大学 | First-order reversal magnetization response matrix characterization method for ferromagnetic material performance |
| CN111521669A (en) * | 2020-06-19 | 2020-08-11 | 国电锅炉压力容器检验有限公司 | Coating bonding strength evaluation method based on electromagnetic induction principle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717191A (en) * | 2016-01-28 | 2016-06-29 | 中国特种设备检测研究院 | Detection method and device for magnetic Barkhausen noise signal and magnetic parameters |
| CN111257407A (en) * | 2020-03-08 | 2020-06-09 | 北京工业大学 | First-order reversal magnetization response matrix characterization method for ferromagnetic material performance |
| CN111257407B (en) * | 2020-03-08 | 2023-04-14 | 北京工业大学 | Method for representing first-order reversal magnetization response matrix of ferromagnetic material performance |
| CN111521669A (en) * | 2020-06-19 | 2020-08-11 | 国电锅炉压力容器检验有限公司 | Coating bonding strength evaluation method based on electromagnetic induction principle |
| CN111521669B (en) * | 2020-06-19 | 2024-01-30 | 国电锅炉压力容器检验有限公司 | Coating bonding strength evaluation method based on electromagnetic induction principle |
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