CN107179353A - The metallic plate sonoelastic coefficient on-line measurement system loaded based on electromagnetism - Google Patents
The metallic plate sonoelastic coefficient on-line measurement system loaded based on electromagnetism Download PDFInfo
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- CN107179353A CN107179353A CN201710565782.7A CN201710565782A CN107179353A CN 107179353 A CN107179353 A CN 107179353A CN 201710565782 A CN201710565782 A CN 201710565782A CN 107179353 A CN107179353 A CN 107179353A
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- 238000005259 measurement Methods 0.000 title claims abstract description 27
- 238000011068 loading method Methods 0.000 claims abstract description 54
- 230000005284 excitation Effects 0.000 claims abstract description 33
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 30
- 239000010703 silicon Substances 0.000 claims abstract description 30
- 238000012360 testing method Methods 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 21
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 3
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 9
- 230000007246 mechanism Effects 0.000 description 8
- 238000002604 ultrasonography Methods 0.000 description 8
- 230000005291 magnetic effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005307 ferromagnetism Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- 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
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- 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
Abstract
The present invention relates to the metallic plate sonoelastic coefficient on-line measurement system loaded based on electromagnetism, it is characterized in that the system includes single-chip microcomputer, pulse signal generator, ultrasonic launching head, ultrasonic reception head, oscillograph, adjustable stabilized voltage supply, storage capacitor, controllable silicon and four loading heads, the output end of the pulse signal generator is connected with ultrasonic launching head, ultrasonic launching head sends ultrasonic wave to test specimen to be measured, ultrasonic wave propagates to ultrasonic reception head, ultrasonic reception head connection oscillograph through test specimen to be measured；Control port of the single-chip microcomputer respectively with pulse signal generator and controllable silicon is connected；The output end of the adjustable stabilized voltage supply is connected with storage capacitor, controllable silicon and four loading heads successively；Four loadings header structure is identical, and two loading heads are one group, every group metallic plate to be loaded is arranged in symmetrical structure up and down upper and lower surface；Each loading head includes excitation coil and permanent magnet.
Description
Technical field
The invention belongs to technical field of nondestructive testing, and in particular to a kind of metallic plate sonoelastic coefficient loaded based on electromagnetism
On-line measurement system.
Background technology
Metal parts, which is stressed factor influence, can produce defect or even fracture, cause serious consequence.Therefore study and examine
The stress surveyed in metal material has very important meaning to production and scientific experimentation.Ultrasonic method is recognized due to its plurality of advantages
To be most one of method of prospect in stress mornitoring, but the raw elasticity system of measured material must be obtained in advance using generation method
Number.Existing method is that standard specimen is stretched using Material Testing Machine in laboratory to obtain the acoustic elasticity of this kind of material
Coefficient, but the difference of the working environment of measured workpiece and laboratory environment, can make the actual sonoelastic coefficient of material and laboratory
Data have differences, and cause stress mornitoring result to produce error.
The content of the invention
It is an object of the invention to provide a kind of metallic plate sonoelastic coefficient on-line measurement system loaded based on electromagnetism, this is
System can measure workpiece sonoelastic coefficient in real time and carry out stress mornitoring, can eliminate the mistake that environmental factor is caused to sonoelastic coefficient
Difference.
The technical scheme that the present invention solves the technical problem use is to provide a kind of metallic plate sound loaded based on electromagnetism
Coefficient of elasticity on-line measurement system, it is characterised in that the system includes single-chip microcomputer, pulse signal generator, ultrasonic launching head, super
Sound reception head, oscillograph, adjustable stabilized voltage supply, storage capacitor, controllable silicon and four loading heads, the pulse signal generator
Output end is connected with ultrasonic launching head, and ultrasonic launching head sends ultrasonic wave to test specimen to be measured, and ultrasonic wave is propagated to through test specimen to be measured
Ultrasonic reception head, ultrasonic reception head connection oscillograph；The control of the single-chip microcomputer respectively with pulse signal generator and controllable silicon
Port is connected；The output end of the adjustable stabilized voltage supply is connected with storage capacitor, controllable silicon and four loading heads successively；Described four
Individual loading header structure is identical, and two loading heads are one group, and every group is arranged in the upper of metallic plate to be loaded in symmetrical structure up and down
Lower surface；Each loading head includes excitation coil and permanent magnet, and the output end of the excitation coil and controllable silicon is connected, and is being swashed
A permanent magnet is fixed in the left half of region and/or right half of region for encouraging coil top.
Compared with prior art, the beneficial effect of measuring system of the present invention is：
1. the present invention uses electromagnetic induction principle, workpiece is not exerted a force from outside, but make workpiece from internal stress so that
The distribution of test specimen internal stress is more uniform；
2. fixing workpiece using chuck in mechanical stretching machine, the pressure of chuck and anti-slip veins thereon can be made to workpiece surface
Into damage.Loading head of the present invention is not contacted directly with workpiece, but by magnetic fields in workpiece, it is to avoid to workpiece test specimen table
The damage in face；
3. the present invention can realize the in-site measurement to sheet metal sonoelastic coefficient, it is not necessary to material is delivered into experiment again
Room is measured, and is both saved the working time, can be avoided laboratory environment is different from working environment to be caused to sonoelastic coefficient measurement again
Error.The stretcher small volume of present system, is easy to carry, and can take outdoor operations to, and scene measures acoustic elasticity system
Number, reduces error.
Brief description of the drawings
Fig. 1 is the structured flowchart for the metallic plate sonoelastic coefficient on-line measurement system that the present invention is loaded based on electromagnetism；
Fig. 2 is that the loading head for the metallic plate sonoelastic coefficient on-line measurement system that the present invention is loaded based on electromagnetism is arranged on gold
Belong to the structural representation on plate；
Fig. 3 is the loading head front view structure for the metallic plate sonoelastic coefficient on-line measurement system that the present invention is loaded based on electromagnetism
Schematic diagram；
Fig. 4 is the loading head main view section for the metallic plate sonoelastic coefficient on-line measurement system that the present invention is loaded based on electromagnetism
Schematic diagram；
Fig. 5 is that the loading head of embodiment 2 installs structural representation on a metal plate；
Fig. 6 is that the loading head of embodiment 3 installs structural representation on a metal plate；
In figure, 1. single-chip microcomputers, 2. pulse signal generators, 3. ultrasonic launching heads, 4. test specimens to be measured, 5. ultrasonic reception heads,
6. oscillograph, 7. adjustable stabilized voltage supplies, 8. storage capacitors, 9. controllable silicons, 10. loading heads, 10-1. permanent magnets, 10-2 excitation lines
Circle.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and examples, but is not wanted in this, as to the application right
Ask the restriction of protection domain.
The metallic plate sonoelastic coefficient on-line measurement system (abbreviation system, referring to Fig. 1-3) that the present invention is loaded based on electromagnetism
Including single-chip microcomputer 1, pulse signal generator 2, ultrasonic launching head 3, ultrasonic reception first 5, oscillograph 6, adjustable stabilized voltage supply 7, storage
Energy electric capacity 8, controllable silicon 9 and four loading heads 10, the output end of the pulse signal generator 2 are connected with ultrasonic launching head 3, are surpassed
Sound emission first 3 sends ultrasonic wave to test specimen to be measured, and ultrasonic wave propagates to ultrasonic reception first 5, ultrasonic reception first 5 through test specimen 4 to be measured
Oscillograph 6 is connected, oscillograph 6 is used for showing and output ultrasonic wave shape；The single-chip microcomputer 1 respectively with pulse signal generator 2 and
The control port connection of controllable silicon 9；The output end of the adjustable stabilized voltage supply 7 successively with storage capacitor 8, controllable silicon 9 and four
Loading head is connected；Four loading header structures are identical, and two loading heads are one group, every group be arranged in symmetrical structure up and down it is to be loaded
Metallic plate upper and lower surface；Each loading head includes a two permanent magnet 10-1 and excitation coil 10-2, the excitation
The output end connection of coil 10-2 and controllable silicon；Permanent magnet 10-1 use neodymium iron boron N52 ferromagnetic materials, be shaped as it is U-shaped, using U
Type entirely wraps coil, and stronger magnetic field can be provided for coil；Two permanent magnet 10-1 polarity on same loading head
On the contrary, mutual attracted formation E shape structures；Excitation coil 10-2 uses hollow rectangle skeleton, and wire uses a diameter of 0.5-2mm
Enamel-cover copper conductor, the winding number of turn be 150-300 circles；Excitation coil 10-2 is embedded in the E shape structures of permanent magnet 10-1 formation
In space, loading head is combined into；
Above-mentioned pulse signal generator 2, ultrasonic launching head 3, ultrasonic reception first 5 and oscillograph 6 constitute ultrasound detection mechanism,
Adjustable stabilized voltage supply 7, storage capacitor 8, controllable silicon 9 and four loading heads 10 constitute electromagnetism load maintainer；Ultrasound detection mechanism and
Electromagnetism load maintainer is coordinated to control by single-chip microcomputer.
Further characteristic of the invention is that the wire of the excitation coil 10-2 uses diameter 1mm copper enameled conducting wires, altogether
The circle of coiling 200.Excitation coil 10-2 is in order that the coil side of force electricity vertical with workpiece, produced using rectangle skeleton
Magnetic force is more evenly distributed within the workpiece, and the loading effect than being obtained using circular coil is good.Diameter 1mm wires belong to diameter and compared
Big wire, in order to be able to which high current when bearing loading is unlikely to blow.Coil ratio is larger, in order that ensureing test specimen
In inspire vortex current density it is sufficiently large, to produce sufficiently large electromagnetic force.
Adjustable stabilized voltage supply 7 is connected to its charging with storage capacitor 8.Single-chip microcomputer 1 sends trigger signal to controllable silicon 9 to be made to put
Electrical circuit (discharge loop is made up of storage capacitor 8, controllable silicon 9, excitation coil 10-2) is turned on, and discharge current passes through excitation coil
10-2 acts on the sensing of test specimen 4 to be measured and produces vortex, and inductive loop is under permanent magnet 10-1 Action of Static Magnetic Field by Lorentz lorentz
Power is acted on, and forms loading effect.
Without will be unloaded in part slave unit to be measured when the present invention is used, loading head is symmetrically disposed at into part both sides to be measured to enter
Row Site Detection.Test specimen to be measured needs to be ferromagnetism steel plate, can conduction can produce vortex wherein.
Described ultrasonic launching head 3 and ultrasonic reception first 5 use variable-angle piezoelectric heads, are produced by changing brilliance degree
Critical refraction longitudinal wave, compressional wave is the waveform most sensitive to stress.
In electromagnetism loading procedure, the change of electromagnetic force is to increase to maximum from 0 to be then reduced to 0, in carry out sound bullet
, it is necessary to carry out ultrasound detection while electromagnetic force is in maximum when property coefficient is detected, ultrasonic inspection is realized by single-chip microcomputer
The coordination control of mechanism and electromagnetism load maintainer is surveyed, accurate time control can be carried out, the electromagnetism produced in electromagnetism load maintainer
Power reaches that the instantaneous trigger ultrasound detection mechanism of maximum carries out the measurement of ultrasonic velocity.
The course of work of measuring system of the present invention：Electromagnetism load maintainer is golden from storage capacitor to excitation coil pulsed discharge
Category plate is inducted vortex under excitation coil effect, and vortex is acted in the presence of permanent magnet magnetostatic field by Lorentz force, realization
Electromagnetism loading to metallic plate.Coordination control is carried out to ultrasound detection mechanism and electromagnetism load maintainer using single-chip microcomputer, in electromagnetism
Power carries out ultrasonic velocity measurement when reaching maximum.Pass through stress suffered by metallic plate and the variable quantity of ultrasonic velocity, you can calculating is obtained
Obtain the sonoelastic coefficient of test specimen to be measured.
Detailed process is：After storage capacitor charging is finished, start single-chip microcomputer, single-chip microcomputer sends first pulse signal, touch
Controlled silicon conducting is sent out, storage capacitor is discharged, discharge loop is turned on, is flowed through in excitation coil electric in pulse current, test specimen to be measured
Magnetic force changes with induced-current, and increase to maximum by zero is decreased to zero again, and test specimen to be measured is loaded by electromagnetism；In single-chip microcomputer hair
Single-chip microcomputer starts countdown while going out first pulse signal, and the length of countdown is to calculate obtained electromagnet pull to reach most
The time being worth greatly；At the end of countdown, the electromagnet pull in test specimen to be measured reaches maximum, and single-chip microcomputer sends trigger signal,
The work of ultrasound detection mechanism is triggered, ultrasonic wave is sent, ultrasonic velocity is calculated according to received ultrasonic signal；According to being applied
The size of electromagnetic force, and the corresponding knots modification of ultrasonic velocity, you can calculate the sonoelastic coefficient of the material in real time.
Measuring system of the present invention can measuring metallic materials in real time sonoelastic coefficient, eliminate environmental factor to sonoelastic coefficient
The error caused.Using the portability of electromagnetism load maintainer, the in-site measurement of sonoelastic coefficient is realized, conventional method is overcome
The shortcoming that the measurement of middle sonoelastic coefficient can only be carried out in laboratory.
Embodiment 1
The present embodiment includes single-chip microcomputer 1, pulse based on the metallic plate sonoelastic coefficient on-line measurement system that electromagnetism is loaded to be believed
Number generator 2, ultrasonic launching head 3, ultrasonic reception first 5, oscillograph 6, adjustable stabilized voltage supply 7, storage capacitor 8, controllable silicon 9 and four
Individual loading head 10, the output end of the pulse signal generator 2 is connected with ultrasonic launching head 3, and ultrasonic launching head 3 is to test specimen to be measured
Ultrasonic wave is sent, ultrasonic wave propagates to ultrasonic reception first 5, the first 5 connection oscillograph 6 of ultrasonic reception through test specimen 4 to be measured；The monolithic
Control port of the machine 1 respectively with pulse signal generator 2 and controllable silicon 9 is connected；The output end of the adjustable stabilized voltage supply 7 is successively
It is connected with storage capacitor 8, controllable silicon 9 and four loading heads；Four loading header structures are identical, and two loading heads are one group, every group
The upper and lower surface of metallic plate to be loaded is arranged in symmetrical structure up and down；Each loading head include two permanent magnet 10-1 and
One excitation coil 10-2, the excitation coil 10-2 and controllable silicon output end connection；Permanent magnet 10-1 is shaped as U-shaped, adopts
Excitation coil is entirely wrapped with U-shaped, two on same loading head permanent magnet 10-1 opposite polarities, mutual attracted formation E
Shape structure；Excitation coil 10-2 uses hollow rectangle skeleton, and excitation coil 10-2 is embedded in the E shape knots of permanent magnet 10-1 formation
In the space of structure, loading head is combined into；
Above-mentioned pulse signal generator 2, ultrasonic launching head 3, ultrasonic reception first 5 and oscillograph 6 constitute ultrasound detection mechanism,
Adjustable stabilized voltage supply 7, storage capacitor 8, controllable silicon 9 and four loading heads 10 constitute electromagnetism load maintainer；Ultrasound detection mechanism and
Electromagnetism load maintainer is coordinated to control by single-chip microcomputer.
Wire described in the present embodiment on excitation coil uses a diameter of 1.0mm enamel-covers copper conductor, and the winding number of turn is 200
Circle, the permanent magnet uses neodymium iron boron N52 ferromagnetic materials.The voltage output range of adjustable stabilized voltage supply is that 0~800V is adjustable；Storage
The highest pressure voltage of energy electric capacity is 1200V, and capacity is 3500uf；Controllable silicon highest withstanding voltage is 1400V, and operating current is
800A。
The present embodiment test specimen 4 to be measured is fine aluminium test specimen, and electricity is being loaded and carried out without electromagnetism respectively to the fine aluminium test specimen
Magnetic carries out ultrasonic velocity measurement when loading, and the relation according to the change of the velocity of sound with applying electromagnetic force, calculating obtains fine aluminium test specimen in reality
Sonoelastic coefficient under the service condition of border is 1.0880 × 10-5.The gross data of the sonoelastic coefficient of known pure aluminum plate is
1.0840×10-5。
The measurement result of the present embodiment matches with gross data, demonstrate measuring system of the present invention data accuracy and
Practicality.
Embodiment 2
The metallic plate sonoelastic coefficient on-line measurement system that the present embodiment is loaded based on electromagnetism, it is characterised in that the system bag
Include single-chip microcomputer, pulse signal generator, ultrasonic launching head, ultrasonic reception head, oscillograph, adjustable stabilized voltage supply, storage capacitor, can
Silicon and four loading heads are controlled, the output end of the pulse signal generator is connected with ultrasonic launching head, ultrasonic launching head is to be measured
Test specimen sends ultrasonic wave, and ultrasonic wave propagates to ultrasonic reception head, ultrasonic reception head connection oscillograph through test specimen to be measured；The monolithic
Control port of the machine respectively with pulse signal generator and controllable silicon is connected；The output end of the adjustable stabilized voltage supply successively with storage
Can electric capacity, controllable silicon and four loading head connections；Four loadings header structure is identical, and two loading heads are one group, and every group is in
Structure symmetrical above and below is arranged in the upper and lower surface of metallic plate to be loaded；Each loading head includes excitation coil and permanent magnet,
The output end connection of the excitation coil and controllable silicon, a permanent magnet is fixed in the right half of region on excitation coil top.This
Permanent magnet is shaped as rectangle in embodiment (referring to Fig. 5).The wire of the excitation coil uses a diameter of 0.8mm enamel-cover
Copper conductor, the winding number of turn is 250 circles.
Embodiment 3
The present embodiment measuring system Each part be the same as Example 2, difference is the shape of permanent magnet in the present embodiment
Shape is U-shaped (referring to Fig. 6).The wire of the excitation coil uses a diameter of 1.2mm enamel-cover copper conductor, and the winding number of turn is 180
Circle.
The present invention does not address part and is applied to prior art.
Claims (8)
1. a kind of metallic plate sonoelastic coefficient on-line measurement system loaded based on electromagnetism, it is characterised in that the system includes monolithic
Machine, pulse signal generator, ultrasonic launching head, ultrasonic reception head, oscillograph, adjustable stabilized voltage supply, storage capacitor, controllable silicon and
Four loading heads, the output end of the pulse signal generator is connected with ultrasonic launching head, and ultrasonic launching head is sent out to test specimen to be measured
Go out ultrasonic wave, ultrasonic wave propagates to ultrasonic reception head, ultrasonic reception head connection oscillograph through test specimen to be measured；The single-chip microcomputer difference
It is connected with the control port of pulse signal generator and controllable silicon；The output end of the adjustable stabilized voltage supply is electric with energy storage successively
Hold, controllable silicon and four loading heads are connected；Four loadings header structure is identical, and two loading heads are one group, every group be in above and below
Symmetrical structure is arranged in the upper and lower surface of metallic plate to be loaded；Each loading head includes excitation coil and permanent magnet, described
The output end connection of excitation coil and controllable silicon, one is fixed in the left half of region and/or right half of region on excitation coil top
Individual permanent magnet.
2. the metallic plate sonoelastic coefficient on-line measurement system according to claim 1 loaded based on electromagnetism, its feature is existed
Include two permanent magnet polarities on two permanent magnets, same loading head on the contrary, mutual attracted formation E shapes in each loading head
In structure, the space of the E shape structures of excitation coil insertion permanent magnet formation.
3. the metallic plate sonoelastic coefficient on-line measurement system according to claim 1 loaded based on electromagnetism, its feature is existed
It is shaped as U-shaped, is entirely wrapped excitation coil in the permanent magnet using U-shaped.
4. the metal electromagnetism loading system according to claim 1 based on Lorentz force, it is characterised in that the permanent magnet
Using neodymium iron boron N52 ferromagnetic materials.
5. the metal electromagnetism loading system according to claim 1 based on Lorentz force, it is characterised in that excitation coil is adopted
With hollow rectangle skeleton.
6. the metallic plate sonoelastic coefficient on-line measurement system according to claim 1 loaded based on electromagnetism, its feature is existed
A diameter of 0.5-2mm enamel-cover copper conductor is used in the wire of the excitation coil, the winding number of turn is 150-300 circles.
7. the metallic plate sonoelastic coefficient on-line measurement system according to claim 1 loaded based on electromagnetism, its feature is existed
Variable-angle piezoelectric heads are used in the ultrasonic launching head and ultrasonic reception head.
8. the metallic plate sonoelastic coefficient on-line measurement system according to claim 1 loaded based on electromagnetism, its feature is existed
It is adjustable for 0~800V in the voltage output range of the adjustable stabilized voltage supply；The highest pressure voltage of storage capacitor is 1200V, is held
Measure as 3500uf；Controllable silicon highest withstanding voltage is 1400V, and operating current is 800A.
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| CN201710565782.7A CN107179353B (en) | 2017-07-12 | 2017-07-12 | Metal plate acoustic elasticity coefficient on-line measuring system based on electromagnetic loading |
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| CN201710565782.7A CN107179353B (en) | 2017-07-12 | 2017-07-12 | Metal plate acoustic elasticity coefficient on-line measuring system based on electromagnetic loading |
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| CN109946379B (en) * | 2019-04-01 | 2020-02-18 | 大连理工大学 | Electromagnetic ultrasonic detection method for unidirectional stress |
| CN114113344A (en) * | 2021-11-11 | 2022-03-01 | 大连理工大学 | Electromagnetic ultrasonic stress measurement system and use method |
| CN114113344B (en) * | 2021-11-11 | 2023-11-07 | 大连理工大学 | Electromagnetic ultrasonic stress measurement system and use method thereof |
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