CN108760117A - The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress - Google Patents
The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress Download PDFInfo
- Publication number
- CN108760117A CN108760117A CN201810193416.8A CN201810193416A CN108760117A CN 108760117 A CN108760117 A CN 108760117A CN 201810193416 A CN201810193416 A CN 201810193416A CN 108760117 A CN108760117 A CN 108760117A
- Authority
- CN
- China
- Prior art keywords
- stress
- magnetic field
- plate
- curve
- ultrasonic wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 title claims abstract description 17
- 230000005291 magnetic effect Effects 0.000 claims description 79
- 239000000463 material Substances 0.000 claims description 53
- 238000000605 extraction Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 11
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005381 magnetic domain Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005330 Barkhausen effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000011202 physical detection method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001595 contractor effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The method that the electromagnetic acoustic that the invention discloses a kind of based on magnetostrictive effect measures plate stress, it is in detection process that electromagnetic acoustic reception signal is associated with the Magnetostrictive curve of tested plate, reflect the Magnetostrictive Properties of ferrimagnet by the variation of electromagnetic ultrasonic signal amplitude, reflects plate stress by extracting the characteristic value point for the Magnetostrictive Properties curve that electromagnetic acoustic detects.The present invention can not contact actual components carry out stress measurement, it is safe to use, nuisanceless, it can be achieved that under service state stress detection, and have higher sensitivity.
Description
Technical field
The present invention relates to ferrimagnet technical field of nondestructive testing more particularly to a kind of electricity based on magnetostrictive effect
The method of magnetic ultrasonic measurement plate stress.
Background technology
Ferrimagnet has good adaptability in terms of mechanical property, therefore in railway, transport, the energy, building, boat
It, military and chemical industry etc. by as critical material, be widely used.
However, miscellaneous ferrimagnet, can due to different processing technologys, different phosphorus content, structure and
Different doped alloys composite materials make its mechanical-physical and chemical characteristic have very big difference.Moreover, ferrimagnet is in difference
Under application environment, very big difference is also had to the performance of the conditions such as load, fatigue, burn into temperature in use.Therefore, it is necessary to pass through
Detection to its magnetic characteristic obtains material microstructure information, so that it is determined that its load, fatigue and etch state, obtain material
Expect life information.
In addition, ferrimagnet can form defect in long service, accident is damaged, causes casualties
With larger economic loss.The formation of defect includes the parts such as incubation period, initial crack generation and expansion phase.Ferrimagnet exists
The early stage of damage, that is, incubation period, performance are typically the change of microstructure caused by the factors such as various microcosmic stress concentrations
Change.Ferrimagnet causes the factor of defect to include in use：By carrying excessive caused local stress and stress collection
In, local plastic deformation is ultimately caused, defect is generated；Fatigue damage caused by being used for a long time；Temperature change leads to metal heat-expansion
Shrinkage, to be formed in the temperature stress of material internal accumulation；Internal residual stress caused by the processing technologys such as welding is distributed；Heat
The material parameters such as processing parameter such as hardness, carburized (case) depth, austenite and martensite content, crystallite dimension.Therefore, it is necessary to material
The distribution of material internal residual stress and the stress concentration of force part are monitored, to prevent material local plastic deformation and
The generation of defect.
Common gapless rail stress mornitoring method can be mainly divided into three classes both at home and abroad at present：Have certain damaging
Mechanical detection method, demarcate rail regular way and non-invasi physical measure.The basic thought of physical detection methods is exactly to utilize
The physical property of material and the relationship of ess-strain calculate structure or structure by measuring the variation of certain physical parameters of material
The stress of part.These method maximum features are to measure the size of stress in the case where not destroying test specimen, therefore industry
Application prospect is extensive.There are Barkhausen Noise, x-ray method, metal magnetic memory test using lossless physical detection methods at present
Method, supercritical ultrasonics technology.But these methods all have the following defects at present：
When 1, carrying out stress mornitoring using Barkhausen Noise, since the frequency of barkhausen signal is higher, by Kelvin effect
Influence, material surface stress can only be detected, but barkhausen signal is affected by steel rail material interior tissue, therefore can
Reliability and popularity rate be not high；
2, x-ray method can only measurement surface stress, detected surface is required high, measuring apparatus is more expensive；
3, the metal magnetic memory test equipment omission factor actually used at present is higher, and reliability has to be strengthened；
It is higher to the surface quality requirements of measurand when 4, being detected using piezoelectric ultrasonic, it is difficult to be used in high temperature, height
The detection environment of speed and rough surface.And the method for utilizing electromagnetic acoustic, to the detection of plate stress, there is presently no deeply grind
Study carefully.
Invention content
The technical problem to be solved by the present invention is to for defect involved in background technology, provide a kind of based on magnetic
The method for causing the electromagnetic acoustic of flex effect to measure plate stress.
The present invention uses following technical scheme to solve above-mentioned technical problem：
The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress, comprises the steps of：
Step 1）, ultrasonic wave transmitting terminal is respectively set on plate and emits the ultrasonic wave of signal for receiving ultrasonic wave transmitting terminal
Receiving terminal, and ultrasonic wave transmitting terminal is placed in the first bias magnetic field, ultrasonic wave receiving terminal is placed in the second bias magnetic field；
Step 2）, using cantilever beam structure, stress is applied to plate so that stress value on plate is from preset first stress value
Increased according to preset stress step-length, until the stress value on plate is equal to preset second stress value, calculating plate exists
Material Magnetostrictive curve characteristic value under each stress value；Wherein, plate material Magnetostrictive curve under stress value is calculated
Characteristic value is as follows：
Step 2.1）So that the second biased magnetic field strength keeps preset magnetic field intensity constant, the transmitting of ultrasonic wave transmitting terminal
The intensity of signal, frequency, pulse number remain that preset value is constant, the magnetic field intensity of the first bias magnetic field of transmitting terminal
Increased from preset first magnetic field intensity according to preset magnetic field intensity step-length, up to the magnetic field intensity of the first bias magnetic field
Equal to preset second magnetic field intensity；Acquire the ultrasonic wave letter of ultrasonic wave receiving terminal under the first bias magnetic field each magnetic field intensity
Number amplitude；
Step 2.2）, the amplitude variation of ultrasonic wave receiving end signal under the first bias magnetic field different magnetic field intensity is fitted into song
Line obtains material Magnetostrictive Properties curve of the plate under stress value；
Step 2.3）, characteristics extraction is carried out to material Magnetostrictive Properties curve, obtains material magnetic of the plate under stress value
Cause the eigenvalue of curve that stretches；
Step 3）, according to plate under different stress corresponding Magnetostrictive Properties eigenvalue of curve, fit the mangneto of plate
Expansion performance eigenvalue of curve with stress relation curve；
Step 4）, for the plate of stress to be measured, its suffered stress intensity is measured according to the following steps：
Step 4.1）, the ultrasonic wave transmitting terminal and the ultrasonic wave receiving terminal are set on the plate of stress to be measured, and make
Ultrasonic wave transmitting terminal is in the first bias magnetic field, ultrasonic wave receiving terminal is in the second bias magnetic field；
Step 4.2）, calculate material Magnetostrictive curve characteristic value of the stress plate to be measured under suffered stress；
Step 4.3）, plate Magnetostrictive Properties eigenvalue of curve with the relation curve of stress in find stress plate to be measured
The corresponding stress intensity of material Magnetostrictive curve characteristic value, the stress intensity suffered by stress plate as to be measured.
As the further side of optimization of method for measuring plate stress the present invention is based on the electromagnetic acoustic of magnetostrictive effect
Case, the step 2.1）In, under each magnetic field intensity of the first bias magnetic field of acquisition after the signal of ultrasonic wave receiving terminal, to signal
It is filtered, intercepts, average filter processing.
As the further side of optimization of method for measuring plate stress the present invention is based on the electromagnetic acoustic of magnetostrictive effect
Case, the step 2.3）In, when carrying out characteristics extraction to material Magnetostrictive Properties curve, extract Magnetostrictive Properties curve
First valley point or first peak point as Magnetostrictive Properties eigenvalue of curve.
The present invention has the following technical effects using above technical scheme is compared with the prior art：
1. the present invention proposes a kind of method based on the electromagnetic acoustic of magnetostrictive effect to plate stress mornitoring, it is extracted energy
Enough reflect the magnetostriction characteristic parameter of stress variation.
2. conventional piezoelectric ultrasound is higher to the surface quality requirements of measurand, it is difficult to be used in high temperature, high speed and coarse
The detection environment on surface can not contact actual components and carry out stress measurement, detection probe can be free using electromagnetic transducer
Mobile Surface Quality require it is low, it is safe to use, nuisanceless, it can be achieved that under service state stress detection.
3. the present invention utilizes the Magnetostrictive Properties of ferrimagnet, and the Magnetostrictive Properties of material are bright by stress variation
It is aobvious, therefore there is higher sensitivity using the stress of the characteristic value of Magnetostrictive curve reflection material.
Description of the drawings
Fig. 1 is the plate stress mornitoring electromagnetic acoustic detecting system schematic diagram of the present invention；
Fig. 2 is the ultrasonic signal figure that electromagnetic acoustic receiving terminal detects；
Fig. 3 is the curve graph that stress influences ferrimagnet Magnetostrictive Properties；
Fig. 4 is A3 steel cantilever beam stress loading experiment platforms；
Fig. 5 is the curve graph for reflecting material Magnetostrictive Properties using electromagnetic ultrasonic signal of the present invention；
Fig. 6（a）, Fig. 6（b）It is Magnetostrictive Properties curvilinear characteristic that first valley point, first peak point are taken in respectively Fig. 5
The relation schematic diagram of magnetic field intensity and applied stress is corresponded to when value.
Specific implementation mode
Technical scheme of the present invention is described in further detail below in conjunction with the accompanying drawings：
The present invention can be embodied in many different forms, and should not be assumed that be limited to the embodiments described herein.On the contrary, providing
These embodiments will give full expression to the scope of the present invention to keep the disclosure thoroughly and complete to those skilled in the art.
In the accompanying drawings, for the sake of clarity it is exaggerated component.
Fig. 1 is electromagnetic acoustic detecting system, and system as shown in Figure 1 inspires ultrasonic wave, acquisition receiving terminal electromagnetic acoustic letter
Number.By the electromagnetic acoustic receiving end signal after interception, average filter as shown in Fig. 2, reading the amplitude variation of signal shown in Fig. 2
To reflect the Magnetostrictive Properties curve with changes of magnetic field.
The principle of the present invention：Ferromagnetic material has the structure of similar crystal.Between adjacent atom, due to electron spin
And first magnetic moment is generated, and there is interaction force between first magnetic moment, it drives adjacent first magnetic moments parallel to arrange in the same direction,
Form magnetic domain.In no external magnetic field, each magnetic domain is balanced mutually, and the total intensity of magnetization of material is equal to zero.When there is external magnetic field
When effect, magnetic domain can rotate so that minor change occurs therewith for length of material or volume, and this phenomenon is known as mangneto and stretches
Contracting effect.Different ferrimagnets have different Magnetostrictive Properties, and Magnetostrictive Properties are by material microstructure, external magnetic
The influences such as field, material stress and condition of heat treatment, Fig. 3 are ferrite material in unstressed, tensile stress and compression
Magnetostriction coefficient increases with the change curve of externally-applied magnetic field with external magnetic field, magnetostriction coefficient reach maximum value after if after
The continuous external magnetic field magnetostriction coefficient that increases is gradually reduced Material shrinkage to the original length（Zero cross point）Further increase magnetic
Field material is shunk, while observing to obtain by curve, and while applying compression, curve moves to right, which means that working as material
Material is influenced by mechanical residual stress, and magnetostriction coefficient reaches maximum value and needs to apply stronger magnetic field.
The ultrasonic signal of electromagnetic acoustic receiving terminal and Magnetostrictive Properties curvilinear correlation are joined, is received and is believed by electromagnetic acoustic
Number amplitude reflect the Magnetostrictive Properties of material with the change curve in applied bias magnetic field, and pass through and extract curvilinear characteristic
The detection of stress is realized in the variation of value, i.e., the inspection to material stress is realized by the electromagnetic acoustic based on magnetostrictive effect
It surveys.
The method of the present invention includes the following steps：
Step 1）, shown in electromagnetic acoustic detecting system Fig. 1, the transmitting terminal of electromagnetic acoustic detecting system is set respectively with receiving terminal
In the both ends of plate, transmitting terminal makees the first bias magnetic field using DC electromagnet, and magnetic field is controlled by controlling DC electromagnet
Variation, receiving terminal using fixed magnetic field intensity permanent magnet provide the second bias magnetic field, pass through electromagnetic acoustic receive signal width
Value carries out the reckoning of ferrimagnet Magnetostrictive Properties curve, and the electromagnetic acoustic receives signal and passes through electromagnetic acoustic detection system
System is filtered the electromagnetic ultrasonic signal of receiving transducer, intercepts, average filter, and electromagnetic acoustic after signal processing receives letter
Number as shown in Figure 2.
Step 2）, stress such as Fig. 4 is applied to plate using cantilever beam structure, stress is applied to plate,（Cantilever beam：Beam
One end is not generate axial direction, vertical displacement and the hold-down support of rotation, and the other end is free end, suffered by the fixing end of measured material
Stress is maximum, along material direction until the stress intensity of end is gradually reduced）.So that stress value on plate is from preset the
One stress value increased according to preset stress step-length, until the stress value on plate is equal to preset second stress value, when
When plate stress value changes, the Magnetostrictive Properties of material will change, super to influence that receiving terminal receives
Acoustical signal amplitude.The measurement of stress value can measure by the following method：4 resistance strain gages are pasted at transmitting terminal, work as examination
On part material when loading stress, the resistance value of resistance strain gage can change, the DTCJ-1 types being connected by resistance strain gage
Stress value is respectively set it is known that strain value at strain gauge adhesion, in experimentation in numerical value that deformeter is shown：
0Mpa, 70Mpa, 130Mpa, 190Mpa, 250MPa calculate plate under stress value material Magnetostrictive curve characteristic value it is specific
Steps are as follows：
Step 2.1）So that the magnetic field intensity of plate receiving terminal keeps preset intensity constant, and ultrasonic wave transmitting terminal emits signal
Intensity, frequency, pulse number keep preset value constant, the magnetic field intensity of the first bias magnetic field of transmitting terminal is from preset first
Magnetic field intensity increased according to preset magnetic field intensity step-length, until the magnetic field intensity of the first bias magnetic field is equal to preset the
Two magnetic field intensities；Acquire the ultrasonic signal amplitude of ultrasonic wave receiving terminal under the first bias magnetic field each magnetic field intensity；
Step 2.2）, the amplitude variation of ultrasonic wave receiving end signal under the first bias magnetic field different magnetic field intensity is fitted into song
Line obtains material Magnetostrictive Properties curve such as Fig. 5 that plate is under a certain fixed stress value；
Step 2.3）, characteristics extraction is carried out to material Magnetostrictive Properties curve, for the magnetostriction under a certain stress value
Characteristic curve, observation find that the increase with transmitting terminal electromagnet bias magnetic field, electromagnetic ultrasonic signal amplitude are in first to reduce upper
The trend reduced again is risen, the first valley point or the first peak point for extracting curve are characterized value, obtain plate under stress value
Corresponding material Magnetostrictive curve characteristic value；
Step 3）, according to plate under different stress corresponding Magnetostrictive Properties eigenvalue of curve, fit the mangneto of plate
Expansion performance eigenvalue of curve with stress relation curve；
Step 4）, for the plate of stress to be measured, its suffered stress intensity is measured according to the following steps：
Step 4.1）, ultrasonic wave transmitting terminal is set on the plate of stress to be measured and emits signal for receiving ultrasonic wave transmitting terminal
Ultrasonic wave receiving terminal, and make ultrasonic wave transmitting terminal be in the first bias magnetic field, ultrasonic wave receiving terminal be in second bias magnetic
In；
Step 4.2）, extract material Magnetostrictive curve characteristic value of the stress plate to be measured under suffered stress；
Step 4.3）, in Magnetostrictive Properties curve any feature value of the plate under different stress with the relation curve of stress
In, find the corresponding stress intensity of stress sheet material Magnetostrictive curve characteristic value to be measured, suffered by stress plate as to be measured
Stress intensity.
Fig. 6（a）, Fig. 6（b）It is Magnetostrictive Properties curve that first valley point, first peak point are taken in respectively Fig. 5
The relation schematic diagram of magnetic field intensity and applied stress is corresponded to when characteristic value.
It, can be by step 1 in order to accurate specifically when application）To step 2）It is repeated 5 times, calculates material mangneto and stretch
After the average value of contracting eigenvalue of curve, then the Magnetostrictive Properties eigenvalue of curve of plate is fitted with the relation curve of stress.
Those skilled in the art of the present technique are it is understood that unless otherwise defined, all terms used herein（Including skill
Art term and scientific terminology）With meaning identical with the general understanding of the those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that with in the context of the prior art
The consistent meaning of meaning, and unless defined as here, will not be explained with the meaning of idealization or too formal.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (3)
1. the method that the electromagnetic acoustic based on magnetostrictive effect measures plate stress, which is characterized in that comprise the steps of：
Step 1）, ultrasonic wave transmitting terminal is respectively set on plate and emits the ultrasonic wave of signal for receiving ultrasonic wave transmitting terminal
Receiving terminal, and ultrasonic wave transmitting terminal is placed in the first bias magnetic field, ultrasonic wave receiving terminal is placed in the second bias magnetic field；
Step 2）, using cantilever beam structure, stress is applied to plate so that stress value on plate is from preset first stress value
Increased according to preset stress step-length, until the stress value on plate is equal to preset second stress value, calculating plate exists
Material Magnetostrictive curve characteristic value under each stress value；Wherein, plate material Magnetostrictive curve under stress value is calculated
Characteristic value is as follows：
Step 2.1）So that the second biased magnetic field strength keeps preset magnetic field intensity constant, the transmitting of ultrasonic wave transmitting terminal
The intensity of signal, frequency, pulse number remain that preset value is constant, the magnetic field intensity of the first bias magnetic field of transmitting terminal
Increased from preset first magnetic field intensity according to preset magnetic field intensity step-length, up to the magnetic field intensity of the first bias magnetic field
Equal to preset second magnetic field intensity；Acquire the ultrasonic wave letter of ultrasonic wave receiving terminal under the first bias magnetic field each magnetic field intensity
Number amplitude；
Step 2.2）, the amplitude variation of ultrasonic wave receiving end signal under the first bias magnetic field different magnetic field intensity is fitted into song
Line obtains material Magnetostrictive Properties curve of the plate under stress value；
Step 2.3）, characteristics extraction is carried out to material Magnetostrictive Properties curve, obtains material magnetic of the plate under stress value
Cause the eigenvalue of curve that stretches；
Step 3）, according to plate under different stress corresponding Magnetostrictive Properties eigenvalue of curve, fit the mangneto of plate
Expansion performance eigenvalue of curve with stress relation curve；
Step 4）, for the plate of stress to be measured, its suffered stress intensity is measured according to the following steps：
Step 4.1）, the ultrasonic wave transmitting terminal and the ultrasonic wave receiving terminal are set on the plate of stress to be measured, and make
Ultrasonic wave transmitting terminal is in the first bias magnetic field, ultrasonic wave receiving terminal is in the second bias magnetic field；
Step 4.2）, calculate material Magnetostrictive curve characteristic value of the stress plate to be measured under suffered stress；
Step 4.3）, plate Magnetostrictive Properties eigenvalue of curve with the relation curve of stress in find stress plate to be measured
The corresponding stress intensity of material Magnetostrictive curve characteristic value, the stress intensity suffered by stress plate as to be measured.
2. the method that the electromagnetic acoustic according to claim 1 based on magnetostrictive effect measures plate stress, feature
It is, the step 2.1）In, under each magnetic field intensity of the first bias magnetic field of acquisition after the signal of ultrasonic wave receiving terminal, to letter
It number is filtered, intercepts, average filter processing.
3. the method that the electromagnetic acoustic according to claim 1 based on magnetostrictive effect measures plate stress, feature
It is, the step 2.3）In, when carrying out characteristics extraction to material Magnetostrictive Properties curve, extraction Magnetostrictive Properties are bent
First valley point or first peak point of line are as Magnetostrictive Properties eigenvalue of curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193416.8A CN108760117A (en) | 2018-03-09 | 2018-03-09 | The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193416.8A CN108760117A (en) | 2018-03-09 | 2018-03-09 | The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108760117A true CN108760117A (en) | 2018-11-06 |
Family
ID=63980237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810193416.8A Pending CN108760117A (en) | 2018-03-09 | 2018-03-09 | The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108760117A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749391A (en) * | 2019-11-04 | 2020-02-04 | 清华大学 | Cutter residual stress testing system and method based on magnetoacoustic emission principle |
| CN110855096A (en) * | 2019-09-20 | 2020-02-28 | 天津工业大学 | Motor noise reduction method based on punching and negative magnetostriction material adding |
| CN113325084A (en) * | 2021-05-25 | 2021-08-31 | 南京航空航天大学 | Method for detecting mechanical property of ferromagnetic material based on sound velocity effect |
| CN116147808A (en) * | 2023-01-13 | 2023-05-23 | 南京航空航天大学 | In-situ detection device and detection method for residual stress of complex ferromagnetic component |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048847A (en) * | 1976-07-14 | 1977-09-20 | Rockwell International Corporation | Nondestructive detection of stress |
| CN101126623A (en) * | 2007-07-20 | 2008-02-20 | 北京工业大学 | Magnetostrictive sensor for steel stranded wire supersonic guided wave detection |
| CN202329889U (en) * | 2011-11-24 | 2012-07-11 | 北京科技大学 | Torque sensor based on magnetostrictive effect |
| CN104848973A (en) * | 2015-04-12 | 2015-08-19 | 北京工业大学 | Method for measuring pulling force of steel rope based on ultrasonic guided wave notch |
| CN105606268A (en) * | 2016-03-13 | 2016-05-25 | 北京工业大学 | Welding residual stress ultrasonic evaluation method based on dynamic magnetostriction coefficient measurement |
-
2018
- 2018-03-09 CN CN201810193416.8A patent/CN108760117A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4048847A (en) * | 1976-07-14 | 1977-09-20 | Rockwell International Corporation | Nondestructive detection of stress |
| CN101126623A (en) * | 2007-07-20 | 2008-02-20 | 北京工业大学 | Magnetostrictive sensor for steel stranded wire supersonic guided wave detection |
| CN202329889U (en) * | 2011-11-24 | 2012-07-11 | 北京科技大学 | Torque sensor based on magnetostrictive effect |
| CN104848973A (en) * | 2015-04-12 | 2015-08-19 | 北京工业大学 | Method for measuring pulling force of steel rope based on ultrasonic guided wave notch |
| CN105606268A (en) * | 2016-03-13 | 2016-05-25 | 北京工业大学 | Welding residual stress ultrasonic evaluation method based on dynamic magnetostriction coefficient measurement |
Non-Patent Citations (3)
| Title |
|---|
| 吴建明: "基于电磁超声的基于电磁超声的钢轨温度应力钢轨温度应力检测技术研究", 《万方数据知识服务平台》 * |
| 周静等: "基于磁致伸缩特征参数的构件应力测试方法", 《2017 远东无损检测新技术论坛》, pages 80 - 87 * |
| 宋小春等: "力磁耦合作用下电磁超声换能器换能效率仿真分析", 《制造业自动化》, vol. 36, no. 8 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855096A (en) * | 2019-09-20 | 2020-02-28 | 天津工业大学 | Motor noise reduction method based on punching and negative magnetostriction material adding |
| CN110749391A (en) * | 2019-11-04 | 2020-02-04 | 清华大学 | Cutter residual stress testing system and method based on magnetoacoustic emission principle |
| CN113325084A (en) * | 2021-05-25 | 2021-08-31 | 南京航空航天大学 | Method for detecting mechanical property of ferromagnetic material based on sound velocity effect |
| CN113325084B (en) * | 2021-05-25 | 2022-04-22 | 南京航空航天大学 | Method for detecting mechanical property of ferromagnetic material based on sound velocity effect |
| CN116147808A (en) * | 2023-01-13 | 2023-05-23 | 南京航空航天大学 | In-situ detection device and detection method for residual stress of complex ferromagnetic component |
| CN116147808B (en) * | 2023-01-13 | 2023-10-03 | 南京航空航天大学 | Detection method of complex ferromagnetic component residual stress in-situ detection device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108760117A (en) | The method that electromagnetic acoustic based on magnetostrictive effect measures plate stress | |
| Hirao et al. | Electromagnetic acoustic resonance and materials characterization | |
| Chen et al. | Quantitative nondestructive evaluation of plastic deformation in carbon steel based on electromagnetic methods | |
| US20160003780A1 (en) | Method for detecting temporally varying thermomechanical stresses and/or stress gradients over the wall thickness of metal bodies | |
| CN112326786B (en) | Metal plate stress detection method based on electromagnetic ultrasonic Lamb wave S1 modal group velocity | |
| Shui et al. | Non-destructive evaluation of the damage of ferromagnetic steel using metal magnetic memory and nonlinear ultrasonic method | |
| CN101126799A (en) | Method for monitoring fatigue damage using ferromagnetic materials surface stray magnetic field signal | |
| US4497209A (en) | Nondestructive testing of stress in a ferromagnetic structural material utilizing magnetically induced velocity change measurements | |
| CN102393419A (en) | Nondestructive detection method for early damage of ferromagnetic material | |
| Uchanin et al. | Nondestructive determination of stresses in steel components by eddy current method | |
| CN103776895B (en) | Nondestructive examination method for evaluating contact damage of ferromagnetic material | |
| Mandal et al. | Detection of stress concentrations around a defect by magnetic Barkhausen noise measurements | |
| Vinogradov et al. | New magnetostrictive transducers and applications for SHM of pipes and vessels | |
| Blaszkiewicz et al. | The eddy current technique for determining residual stresses in steels | |
| Shen et al. | Prediction of residual stress components and their directions from pile-up morphology: An experimental study | |
| Szielasko et al. | Early detection of critical material degradation by means of electromagnetic multi-parametric NDE | |
| Shui et al. | Characterization of surface damage of a solid plate under tensile loading using nonlinear Rayleigh waves | |
| Bruni et al. | A preliminary analysis about the application of acoustic emission and low frequency vibration methods to the structural health monitoring of railway axles | |
| Silva et al. | Determining residual stresses in ferromagnetic materials by Barkhausen noise measurement | |
| Li et al. | Contactless evaluation of stress in anisotropic metallic plates using nonlinear electromagnetic acoustic resonance technique | |
| Vinogradov et al. | Mockup evaluation of magnetostrictive transducers for guided wave monitoring of pipe at 200 C | |
| Pan et al. | Evaluation of bolt axial stress based on nonlinear ultrasonic technique | |
| Dai et al. | Fatigue crack growth measurements in TMF testing of titanium alloys using an ACPD technique | |
| Vinogradov et al. | Evaluation of FeCo magnetostrictive sensors for SHM of components operating in harsh environmental conditions | |
| Muravyeva et al. | Change in the Acoustic and Elastic Properties of the Cylindrical Steel Specimens during the Tensile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181106 |