CN205941451U - Magnetism performance parameters , magnetism barkhausen , magnetosonic transmission detection device - Google Patents
Magnetism performance parameters , magnetism barkhausen , magnetosonic transmission detection device Download PDFInfo
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- CN205941451U CN205941451U CN201620809075.9U CN201620809075U CN205941451U CN 205941451 U CN205941451 U CN 205941451U CN 201620809075 U CN201620809075 U CN 201620809075U CN 205941451 U CN205941451 U CN 205941451U
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Abstract
The utility model discloses a magnetism performance parameters, magnetism barkhausen, magnetosonic transmission detection device. The device includes: signal generator, coupling to sensor for produce drive signal, the sensor for start working under drive signal's of the triggering, and to is detected and export following signal by detectable material: magnetism barkhausen signal, magnetism performance parameters, magnetism acoustic emission signal still include following circuit: magnetism barkhausen signal conditioning circuit, magnetism performance parameters modulate circuit, magnetosonic transmission signal conditioning circuit, the treater for signal that the circuit that includes according to the device acquireed calculate by detectable material following one of at least: fatigue, stress, defect. Through the utility model discloses, solved and adopted single method to complex operating condition down by the unsafe problem of detectable material's testing result in the correlation technique.
Description
Technical field
The utility model is related to detection field, sends out in particular to a kind of parameter of magnetic characteristic, magnetic Barkhausen, magnetosonic
Penetrate detection means.
Background technology
At present, long-distance oil ＆ gas pipeline coverage is very big, and taking China as a example, Chinese long-distance oil ＆ gas pipeline total length reaches
100000 kms, including transfering natural gas from the west to the east, in-Russia's crude oil pipeline etc., define the product oil backbone network of " Xi Youdong send, northern oil is gone down south "
General layout, and oil pipeline is mainly formed using the rolling of carbon steel class ferrimagnet, is chronically at field for these oil and gas pipes
Atrocious weather situation, is subject to for a long time oil-air pressure and corrosiveness, and crackle and corrosion easily occur, such as in-Russia's crude oil pipeline Mo River
To Daqing Section through permafrost region and virgin forest.For these pipelines, it is carried out with stress, fatigue, defects detection and monitoring will become
Obtain particularly significant.
At present, some achievements in research existing and utility model can complete part detection.But, the detection method of prior art
Can only be single complete stress, coercivity, magnetosonic transmitting mensure, for the complexity being affected by stress, burn into defect simultaneously
The pipeline of operating mode, is difficult to its degree of injury is effectively assessed using single method.
Ask using single method is inaccurate to the testing result being detected material under complex working condition in correlation technique
Topic, not yet proposes effective solution at present.
Utility model content
Main purpose of the present utility model is to provide a kind of parameter of magnetic characteristic, magnetic Barkhausen, magnetic acoustic emission detection dress
Put, to solve the inaccurate problem of testing result to material detected under complex working condition using single method.
To achieve these goals, according to one side of the present utility model, there is provided a kind of parameter of magnetic characteristic, magnetic Bark
Bold and unconstrained gloomy, magnetic acoustic emission detection system, this device includes：Signal generator, coupled to sensor, for producing pumping signal；Pass
Sensor, for starting working under the triggering of pumping signal, and is detected to detected material and is exported signals below：Magnetic
Barkhausen signal, parameter of magnetic characteristic, magnetosonic transmission signal；Device also includes circuits below：Magnetic barkhausen signal conditioning electricity
Road, parameter of magnetic characteristic modulate circuit, magnetosonic transmission signal modulate circuit；Wherein, magnetic barkhausen signal modulate circuit be used for from
Sensor obtains magnetic barkhausen signal, and parameter of magnetic characteristic modulate circuit is used for obtaining parameter of magnetic characteristic from sensor, and magnetosonic is sent out
Penetrate signal conditioning circuit for obtaining magnetosonic transmission signal from sensor；Device also includes：Processor, for including according to device
Circuit obtain signal of change be detected material at least one of：Fatigue, stress, defect.
Further, this device also includes：Pumping signal Acquisition Circuit, for swashing to sensor input from signal generator
Encourage input interface collection voltages and/or the electric current of signal.
Further, this device also includes：Power amplification circuit, is connected between signal generator and sensor, is used for
The pumping signal that signal generator is produced is amplified, and exports in sensor.
Further, this device also includes：Converter corresponding with circuit quantity, is connected to the circuit that device includes
And processor between, for carrying out the conversion of digital and analog signaling.
Further, this device also includes:Main control circuit, the circuit including coupled to signal generator and device,
Produce pumping signal for control signal generator, and at least one of the circuit including for control device is from sensor
Obtain signal.
Further, main control circuit, the frequency of the pumping signal producing for control signal generator and amplitude.
Further, magnetic barkhausen signal modulate circuit, parameter of magnetic characteristic modulate circuit and magnetosonic transmission signal are adjusted
Reason circuit all includes：Wave filter and signal amplifier.
The utility model passes through signal generator, coupled to sensor, for producing pumping signal；Sensor, for
Start working under the triggering of pumping signal, and detected material is detected and is exported signals below：Magnetic Barkhausen believes
Number, parameter of magnetic characteristic, magnetosonic transmission signal；Also include circuits below：Magnetic barkhausen signal modulate circuit, parameter of magnetic characteristic are adjusted
Reason circuit, magnetosonic transmission signal modulate circuit；Wherein, magnetic barkhausen signal modulate circuit is used for obtaining magnetic Bark from sensor
The gloomy signal of person of outstanding talent, parameter of magnetic characteristic modulate circuit is used for obtaining parameter of magnetic characteristic from sensor, and magnetosonic transmission signal modulate circuit is used
In from sensor acquisition magnetosonic transmission signal；Processor, the signal of change that the circuit for being included according to device obtains is detected
At least one of of material：Fatigue, stress, defect, solve and adopt single method in correlation technique to quilt under complex working condition
The inaccurate problem of testing result of detection material, and then reached under complex working condition to the testing result of detected material more
Comprehensively effect.
Brief description
The accompanying drawing constituting the part of the application is used for providing further understanding to of the present utility model, of the present utility model
Schematic description and description is used for explaining the utility model, does not constitute to improper restriction of the present utility model.In accompanying drawing
In：
Fig. 1 is according to the parameter of magnetic characteristic of the utility model first embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram；
Fig. 2 is according to the parameter of magnetic characteristic of the utility model second embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram；
Fig. 3 is according to the parameter of magnetic characteristic of the utility model 3rd embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram；
Fig. 4 is the schematic diagram of the coercivity measurement according to the utility model embodiment；
Fig. 5 is the schematic diagram of the permeability curcve measurement according to the utility model embodiment；
Fig. 6 is the schematic diagram of the barkhausen signal according to the utility model embodiment；And
Fig. 7 is the schematic diagram of the magnetosonic transmission signal according to the utility model embodiment.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Mutually combine.To describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order that those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present application it is clear that described embodiment is only
The embodiment of the application part, rather than whole embodiments.Based on the embodiment in the application, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, all should belong to the model of the application protection
Enclose.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that such use
Data can exchange in the appropriate case, so that embodiments herein described herein.Additionally, term " inclusion " and " tool
Have " and their any deformation it is intended that covering non-exclusive comprising, for example, contain series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include unclear
Listing to Chu or for these processes, method, product or the intrinsic other steps of equipment or unit.
The utility model embodiment provides a kind of parameter of magnetic characteristic, magnetic Barkhausen, magnetic acoustic emission detection system.
Fig. 1 is according to the parameter of magnetic characteristic of the utility model first embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram, as shown in figure 1, this device includes：
Signal generator 10, coupled to sensor 20, for producing pumping signal.
Sensor 20, for starting working under the triggering of pumping signal, and is detected and defeated to detected material
Go out signals below：Magnetic barkhausen signal, parameter of magnetic characteristic, magnetosonic transmission signal.
This device also includes circuits below：Magnetic barkhausen signal modulate circuit 30, wherein, magnetic barkhausen signal is nursed one's health
Circuit 30 is used for obtaining magnetic barkhausen signal from sensor 20；Parameter of magnetic characteristic modulate circuit 40, parameter of magnetic characteristic conditioning electricity
Road 40 is used for obtaining parameter of magnetic characteristic from sensor 20；Magnetosonic transmission signal modulate circuit 50, wherein, magnetosonic transmission signal is nursed one's health
Circuit 50 is used for obtaining magnetosonic transmission signal from sensor 20.
Processor 60, for the signal of change that the circuit that included according to device obtains be detected material following at least it
One：Fatigue, stress, defect.
This embodiment is passed through to launch magnetic barkhausen signal modulate circuit 30, parameter of magnetic characteristic modulate circuit 40 and magnetosonic
Signal conditioning circuit 50 all accesses this detection means, solves and adopts single method in correlation technique to tested under complex working condition
Measure and monitor the growth of standing timber the inaccurate problem of testing result of material, and then reached more complete to the testing result of detected material under complex working condition
The effect in face, is capable of the Non-Destructive Testing to detected material.
Signal generator 10 can produce pumping signal, and signal generator 10 can be signal generating circuit, wherein, excitation
Signal can be random waveform, can be used as the work of pumping signal trigger sensor 20, and sensor 20 is subject to excitation signal
Triggering, then start working, detected material detected, export multiple signals, multiple signals be magnetic Barkhausen letter
Number, parameter of magnetic characteristic, magnetosonic transmission signal.After sensor exports multiple signals, multiple signals are obtained by corresponding circuit,
For example, magnetic barkhausen signal modulate circuit 30 obtains magnetic barkhausen signal from sensor 20；Parameter of magnetic characteristic modulate circuit
40 obtain parameter of magnetic characteristic from sensor 20；Magnetosonic transmission signal modulate circuit 50 obtains magnetosonic transmission signal from sensor 20,
After getting multiple signals by multiple circuit, pass the signal to processor 60, processor 60 is according to corresponding signal of change
At least one the fatigue of detected material, stress, defect, for example, it may be in the fatigue of measured material, stress and defect three
Any one or two it is also possible to calculate three measured result of measured material.The parameter of magnetic characteristic of measured material includes
Coercivity, magnetic conductivity etc., under different fatigue state, coercivity is different, therefore can judge fatigue state by coercivity for material,
And Barkhausen is combined with magnetosonic transmission signal and can determine whether stress, the most at last triplicity can be determined that the fatigue of material, stress,
Defect etc..
Alternatively, this device also includes：Pumping signal Acquisition Circuit, for inputting to sensor 20 from signal generator 10
The input interface collection voltages of pumping signal and/or electric current.Pumping signal Acquisition Circuit is from the input signal of sensor 20
Input interface collection voltages and/or electric current, can a collection voltages it is also possible to only collection electric current can also collection voltages simultaneously
And electric current.
Alternatively, this device also includes：Power amplification circuit, is connected between signal generator 10 and sensor 20, uses
It is amplified in the pumping signal producing signal generator 10, and export in sensor 20.If signal generator 10
The signal going out is fainter, then it is possible that error during signal transmission and detection, in order to reduce the mistake that error causes
Judge, be provided with power amplification circuit between signal generator 10 and sensor 20, the excitation that signal generator 10 is produced
Signal is amplified, and then exports in sensor 20 again, by arranging power amplification circuit, can reduce signal errors and cause
Erroneous judgement, improve magnetic characteristic signal detecting result accuracy.
Alternatively, this device also includes：Converter corresponding with circuit quantity, be connected to the circuit that device includes and
Between processor, for carrying out the conversion of digital and analog signaling.Three included in device between circuit and processor, setting
There is converter corresponding with corresponding circuit quantity, for example, device includes magnetic barkhausen signal modulate circuit 30, magnetic characteristic ginseng
Count three in modulate circuit 40 and magnetosonic transmission signal modulate circuit 50, then device has three converters, and converter can
Carry out the conversion between data signal and analog signal.
Alternatively, this device also includes：Main control circuit, the circuit including coupled to signal generator 10 and device,
Produce pumping signal for control signal generator 10, and at least one of the circuit including for control device is from sensing
Device 20 obtains signal.Magnetic barkhausen signal modulate circuit 30 that main control circuit is included with signal generator 10 and device,
Parameter of magnetic characteristic modulate circuit 40 and magnetosonic transmission signal modulate circuit 50 couple, and master control circuit controls signal generator 10 produces
Raw pumping signal, then controls at least one of above three circuit to obtain signal from sensor 20.
Alternatively, main control circuit is used for the frequency of pumping signal and the amplitude that control signal generator 10 produces.Master control
Circuit processed be used for control signal generator 10 produce the frequency of pumping signal and amplitude, pumping signal can be any frequency and
The signal of amplitude, but in order to optimize pumping signal, can be carried by the frequency and amplitude of master control circuit controls pumping signal
The accuracy of high test result.
Alternatively, magnetic barkhausen signal modulate circuit 30, parameter of magnetic characteristic modulate circuit 40 and magnetosonic transmission signal
Modulate circuit 50 all includes：Wave filter and signal amplifier.Alternatively, above three circuit all includes wave filter and signal amplifies
Device, wherein, wave filter can be used for the clutter that filtering circuit is disturbed etc. generation by electromagnetic signal, improves the accuracy of signal,
Also improve the accuracy of testing result further.
Fig. 2 is according to the parameter of magnetic characteristic of the utility model second embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram, as shown in Fig. 2 this device includes：Main control circuit, signal generating circuit 101, sensor 20, power amplification electricity
Road, pumping signal Acquisition Circuit, multiple analog-digital converter, parameter of magnetic characteristic modulate circuit 40, magnetic barkhausen signal conditioning electricity
Road 30, magnetosonic transmission signal modulate circuit 50, sensor and control software composition.
Main control circuit as the control centre of whole device hardware components, for receiving control software order and controlling it
He works at circuit coordinates.Signal generating circuit 101 is used for producing pumping signal, and the pumping signal of generation can be random waveform.
Power amplification circuit is used for amplifying pumping signal, the pumping signal stimulus sensor work of amplification.Pumping signal Acquisition Circuit is used
In the voltage x current of collection pumping signal input interface, use for subsequent calculations parameter of magnetic characteristic.Parameter of magnetic characteristic modulate circuit
The parameter of magnetic characteristic signal that sensor is received is filtered and pressure regulation is processed.The conditioning of magnetic barkhausen signal is capable of bar
The amplification of Ke Haosen signal and filtering.Magnetosonic transmission signal modulate circuit is capable of amplification and the filtering of acoustic emission signal.Respectively
Individual analog-digital converter is by the corresponding signal transmission receiving to main control circuit.Sensor 20 is placed against or near tested material, passes through
Pumping signal input interface input signal, during working sensor, measures interface by magnetic barkhausen signal and exports magnetic bar
Ke Haosen signal, measures interface by parameter of magnetic characteristic and exports parameter of magnetic characteristic, measures interface output by magnetosonic transmission signal
Magnetosonic transmission signal.May finally complete to the analysis gathering signal by control software, comprehensively to fatigue of materials, stress, defect
Judgement.
Fig. 3 is according to the parameter of magnetic characteristic of the utility model 3rd embodiment, magnetic Barkhausen, magnetic acoustic emission detection system
Schematic diagram, as shown in figure 3, pumping signal input interface is provided with sensor 20, sensor 20 pumping signal touch
Give and start working, detected material is detected, alternatively, sensor can be with detection magnetic barkhausen signal, magnetic characteristic
Parameter, magnetosonic transmission signal, are provided with parameter of magnetic characteristic measurement interface, barkhausen signal measurement interface and magnetic on a sensor
Acoustic emission signal measures interface, in order to the corresponding magnetic barkhausen signal detecting, parameter of magnetic characteristic, magnetosonic transmission signal
Output.The parameter of magnetic characteristic of measured material includes coercivity, magnetic conductivity etc., and, under different fatigue state, coercivity is different for material,
Therefore fatigue state can be judged by coercivity, and Barkhausen is combined with magnetosonic transmission signal and can determine whether stress, the most at last three
Person combines and can be determined that the fatigue of material, stress, defect etc..
Fig. 4 is the schematic diagram of the coercivity measurement according to the utility model embodiment, as shown in figure 4, abscissa represents magnetic
Field intensity H, ordinate represents magnetic induction density B.When magnetic field intensity gradually decreases to-Hm by Hm, induced field strength will not prolong magnetic
Change curve 0a change, but extension curve abcd change, change to-Bm from Bm, when magnetic field is further added by Hm by-Hm, induction field
Good general prolongs defa change, and this law curve is referred to as hysteresis curve.As H=0, induced field strength Br is not zero, and Br is referred to as remanent induction
Intensity.As B=0, magnetic field intensity Hc now is referred to as coercivity, the therefore measurement apparatus of the present embodiment, can be by using
Signal generator, such as function generator, continuously sinusoidal or other signals of generation, obtain coercitive size.
Fig. 5 is the schematic diagram of the permeability curcve measurement according to the utility model embodiment, as shown in figure 5, abscissa table
Show magnetic field intensity H, unit is A/m, ordinate represents magnetic induction density B, unit is H/m.The computing formula of magnetic conductivity is μ=B/
H；Can get permeability curcve by the magnetization curve recording is asked with slope.
Fig. 6 is the schematic diagram of the barkhausen signal according to the utility model embodiment, and Fig. 7 is real according to the utility model
Apply the schematic diagram of the magnetosonic transmission signal of example, when alternating excitation signal is tested to material, material internal neticdomain wall occurs anti-
Turn, produce barkhausen signal and magnetosonic transmission signal, respectively as shown in Figure 6 and Figure 7.
The magnetic parameter detection means of the utility model embodiment can complete the excitation to sensor and multiple signals
Collection and process.According to the measurement demand of device, main control circuit can be equipped with peripheral circuit using FPGA and complete, Barkhausen
And the driving voltage of magnetosonic transmitting is generally several width to tens width, when therefore designing, Fu Ji electricity can be produced using signal generating circuit
Pressure, is amplified to tens width levels through power amplification circuit.Signal generating circuit can occur core using high-precision programmable waveform
Piece is equipped with respective peripheral circuit and completes, such as using the AD9833 type circuit of ADI company, can be with sine wave output, triangular wave, side
Ripple, output frequency is 0～12.5Mhz, fully meets measurement request.Therefore, modelled signal frequency is 0～10KHz, output signal
0～3V, during work, by master control circuit controls output waveform frequency and signal amplitude.Power amplification circuit can be using U.S.
State's LM38863TF chip, its power output is tens watts of levels, fully meets requirement, for ensureing undistorted, the multiplication factor of signal
Design, in 0～36dB, carries a width of direct current～1KHz.Pumping signal Acquisition Circuit and parameter of magnetic characteristic modulate circuit all adopt voltage
With current meter work principle, collect corresponding voltage, current value.With pumping signal Acquisition Circuit and parameter of magnetic characteristic conditioning
The analog-digital converter that circuit is connected all can be equipped with adapter circuit using AD1674JN, and AD1674JN adopts speed for 12 100kHz
Modulus conversion chip.Magnetic barkhausen signal modulate circuit is made up of small signal amplifier and wave filter, and small-signal is amplified
Device is used for amplifying the barkhausen signal of millivolt level, and multiplication factor requires 20～60dB.Barkhausen signal frequency typically exists
1kHz～2MHz, wave filter setting band logical frequency range is 1kHz～500kHz.The mould being connected with magnetic barkhausen signal modulate circuit
Number converter is equipped with adapter circuit using AD1672AP, and AD1672AP is that 12 3MHz adopt speed high speed analog-to-digital conversion chip.
Magnetosonic transmission signal modulate circuit is made up of wave filter and signal amplifier, and magnetosonic transmission signal amplifier is used for amplifying magnetosonic to be sent out
Penetrate signal, multiplication factor requires 20～60dB.Wave filter setting band logical frequency range is 50kHz～400kHz.With magnetosonic transmission signal
The analog-digital converter that modulate circuit is connected is equipped with adapter circuit using AD1671JQ, and AD1671JQ is 12 1.25MHz using speed
Rate high precision analogue conversion chip.
During the work of magnetic parameter detection means, main control circuit work, signal generating circuit can be controlled by control software
Produce pumping signal first, after amplifying through power amplification circuit, stimulus sensor work, during normal operation of sensor, records simultaneously
Parameter of magnetic characteristic, barkhausen signal, magnetosonic transmission signal, through the output of respective port, parameter of magnetic characteristic signal produces through magnetic characteristic
Main control circuit is passed to after analog-to-digital conversion, magnetic barkhausen signal and acoustic emission signal are through each self-regulated after raw modulate circuit conditioning
Amplifier and the wave filter of reason circuit amplify with filtering after pass to main control circuit after analog-to-digital conversion, finally through control software at
Reason, completes the judgement to material situation.The detection means of the utility model embodiment solves and adopts single side in correlation technique
The inaccurate problem of testing result to material detected under complex working condition for the method, and then reached under complex working condition to detected
The testing result of material more fully effect.
In above-described embodiment of the present utility model, the description to each embodiment all emphasizes particularly on different fields, in certain embodiment
There is no the part describing in detail, may refer to the associated description of other embodiment.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.All of the present utility model spirit and principle
Within, any modification, equivalent substitution and improvement made etc., should be included within protection domain of the present utility model.
Claims (7)
1. a kind of parameter of magnetic characteristic, magnetic Barkhausen, magnetic acoustic emission detection system are it is characterised in that include：
Signal generator, coupled to sensor, for producing pumping signal；
Sensor, for starting working under the triggering of described pumping signal, and is detected to detected material and is exported
Signals below：Magnetic barkhausen signal, parameter of magnetic characteristic, magnetosonic transmission signal；
Described device also includes circuits below：
Magnetic barkhausen signal modulate circuit, parameter of magnetic characteristic modulate circuit, magnetosonic transmission signal modulate circuit；Wherein, described
Magnetic barkhausen signal modulate circuit is used for obtaining described magnetic barkhausen signal from described sensor, and described parameter of magnetic characteristic is adjusted
Reason circuit is used for obtaining described parameter of magnetic characteristic from described sensor, and described magnetosonic transmission signal modulate circuit is used for from described biography
Sensor obtains described magnetosonic transmission signal；
Described device also includes：Processor, for detected described in the signal of change of the circuit acquisition being included according to described device
At least one of of material：Fatigue, stress, defect.
2. device according to claim 1 is it is characterised in that described device also includes：Pumping signal Acquisition Circuit, is used for
From described signal generator to the input interface collection voltages of described sensor input signal and/or electric current.
3. device according to claim 1 is it is characterised in that described device also includes：Power amplification circuit, is connected to institute
State between signal generator and described sensor, the described pumping signal for producing described signal generator is amplified,
And export in described sensor.
4. device according to claim 1 is it is characterised in that described device also includes：Corresponding with described circuit quantity
Converter, is connected between the circuit that described device includes and described processor, for carrying out digital and analog signaling
Conversion.
5. device according to claim 1 is it is characterised in that described device also includes:Main control circuit, coupled to described
The circuit that signal generator and described device include, for controlling described signal generator to produce described pumping signal, and
For controlling at least one of circuit that described device includes to obtain signal from described sensor.
6. device according to claim 5 is it is characterised in that described main control circuit, for controlling described signal to occur
The frequency of pumping signal and amplitude that device produces.
7. device according to claim 1 is it is characterised in that described magnetic barkhausen signal modulate circuit, described magnetic are special
Property parameter modulate circuit and described magnetosonic transmission signal modulate circuit all include：Wave filter and signal amplifier.
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| CN201620809075.9U CN205941451U (en) | 2016-07-28 | 2016-07-28 | Magnetism performance parameters , magnetism barkhausen , magnetosonic transmission detection device |
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| CN201620809075.9U CN205941451U (en) | 2016-07-28 | 2016-07-28 | Magnetism performance parameters , magnetism barkhausen , magnetosonic transmission detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093181A (en) * | 2016-07-28 | 2016-11-09 | 中国特种设备检测研究院 | Parameter of magnetic characteristic, magnetic Barkhausen, magnetosonic launch detection method and device |
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2016
- 2016-07-28 CN CN201620809075.9U patent/CN205941451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106093181A (en) * | 2016-07-28 | 2016-11-09 | 中国特种设备检测研究院 | Parameter of magnetic characteristic, magnetic Barkhausen, magnetosonic launch detection method and device |
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