CN103616441A - Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material - Google Patents
Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material Download PDFInfo
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- CN103616441A CN103616441A CN201310646673.XA CN201310646673A CN103616441A CN 103616441 A CN103616441 A CN 103616441A CN 201310646673 A CN201310646673 A CN 201310646673A CN 103616441 A CN103616441 A CN 103616441A
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- ferromagnetic material
- impedance matching
- ultrasonic signal
- electromagnetic ultrasonic
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Abstract
The invention relates to an electromagnetic ultrasonic non-destructive detection technique, and in particular relates to an electromagnetic ultrasonic signal excitation device applied to a ferromagnetic material. The electromagnetic ultrasonic transduction theory is adopted, and ultrasonic signals about separation of the longitudinal wave and the transverse wave can be excited for on-line detection on small defects of a thin plate which is made of the ferromagnetic material. A magnetic field is provided by virtue of an electromagnet, the electromagnetic ultrasonic transduction theory is regarded as the key of the technique, excited lorentz force and magnetostriction force are subjected to orthogonal decomposition, no coupling agent is needed when the device is used, pretreatment on the surface of a test piece is not needed, and the device can be applied to on-line detection on the ferromagnetic material in severe environment such as high temperature and high speed, and is wide in application range and high in detection efficiency.
Description
Technical field
The present invention relates to electromagnetic acoustic Dynamic Non-Destruction Measurement, is exactly a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material specifically.
Background technology
Along with China's industrialization, modern deeply further, the application of ferromagnetic material spreads all over industry-by-industry, particularly in the national important infrastructures such as petroleum pipe line, boiler, bridge, there is irreplaceable critical positions, the quality testing of ferromagnetic material in these facilities, life-span monitoring is directly connected to the safe operation of national economy.Yet due to the impact of severe environment for use, these sheet materials ftracture unavoidably, corrode, so that occur potential security threat, therefore, these defects that detect are as early as possible gone forward side by side to exercise and are just seemed most important with life appraisal.Traditional piezoelectric supersonic signal supervisory instrument need to carry out pre-service to test specimen, and daubing coupling agent, so this kind equipment labour intensity is large, and detection efficiency is low.And signal supervisory instrument based on electromagnetic acoustic transducing mechanism is with its non-contacting feature, not only can adapt to well the complicated rugged environments such as high temperature, high speed, and improve detection efficiency.It is separated that in the present invention, the design of exciting bank can realize the quadrature of Lorentz force and magnetostrictive force, make its motivate wavelength-division in length and breadth from signal, improve the detectability of electromagnetic acoustic Non-Destructive Testing.
Summary of the invention
The invention provides a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material.
The object of the present invention is achieved like this: described a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material, it is comprised of great power pulse power source, impedance matching system and ultrasonic signal excitation system, great power pulse power source connects impedance matching system, and impedance matching system connects ultrasonic signal excitation system.
The present invention also has following technical characterictic:
(1) described great power pulse power source comprises pulse signal producer, power amplifying system, Over Current Protection System; pulse signal producer produces adjustable pulse signal; pulse signal inputs to power amplifying system, and power amplifying system connects impedance matching system.
(2) described impedance matching system comprises capacitor array, electric inductance array, and capacitor array and electric inductance array interconnect, and are then connected with ultrasonic signal excitation system, by the connection in series-parallel between capacitor array and electric inductance array, realize impedance matching.
(3) described ultrasonic signal excitation system comprises zigzag electromagnet, snakelike coil.The drive coil of zigzag electromagnet is synchronizeed with snakelike coil.
The present invention is a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material, and job step is as follows:
Step 1: pulse signal producer produces adjustable pulse signal, and pulse signal inputs to power amplifying system, signal connects impedance matching system after power amplifying system amplifies.
Step 2: regulate impedance matching system, make the pulse power obtain peak power output.
Step 3: impedance matching system connects ultrasonic signal excitation system, obtain wavelength-division in length and breadth from ultrasonic signal.
Accompanying drawing explanation
Fig. 1 is general structure block diagram of the present invention;
Fig. 2 is great power pulse power source structured flowchart of the present invention;
Fig. 3 is impedance matching system structured flowchart of the present invention;
Fig. 4 is signal excitation system of the present invention schematic diagram of a certain moment;
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described for example.
As shown in Figure 1, great power pulse power source (1) produces pulse current, via exporting to ultrasonic signal excitation system (3) after impedance matching system (2) coupling, finally produces separated compressional wave and shear wave.
As shown in Figure 2, described great power pulse power source (1) comprises pulse signal producer (4), power amplifying system (5) and Over Current Protection System (6), and power amplifying system (5) connects impedance matching system (2).
As shown in Figure 3, described impedance matching system (2) comprises capacitor array (7), electric inductance array (8), and capacitor array (7) interconnects with electric inductance array (8), then connects ultrasonic signal excitation system (3).
As shown in Figure 4, described ultrasonic signal excitation system (3) comprises zigzag electromagnet (9), snakelike coil (10), the drive coil of zigzag electromagnet (9) is synchronizeed with snakelike coil, to inspire Lorentz force and the magnetostrictive force of quadrature.
The present invention is a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material, and job step is as follows:
Step 1: pulse signal producer produces adjustable pulse signal, and pulse signal inputs to power amplifying system, signal connects impedance matching system after power amplifying system amplifies.
Step 2: regulate impedance matching system, make the pulse power obtain peak power output.
Step 3: impedance matching system connects ultrasonic signal excitation system, obtain wavelength-division in length and breadth from ultrasonic signal.
Claims (4)
1. the electromagnetic acoustic signal exciting bank for ferromagnetic material, it is comprised of great power pulse power source (1), impedance matching system (2), ultrasonic signal excitation system (3), its feature connects impedance matching system (2) at great power pulse power source (1), and impedance matching system (2) connects ultrasonic signal excitation system (3).
2. a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material according to claim 1; it is characterized in that: described great power pulse power source comprises pulse signal producer (4), power amplifying system (5) and Over Current Protection System (6), power amplifying system (5) connects impedance matching system (2).
3. a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material according to claim 1, it is characterized in that: described impedance matching system (2) comprises capacitor array (7), electric inductance array (8), capacitor array (7) interconnects with electric inductance array (8), then connects ultrasonic signal excitation system (3).
4. a kind of electromagnetic acoustic signal exciting bank for ferromagnetic material according to claim 1, is characterized in that: described ultrasonic signal excitation system (3) comprises zigzag electromagnet (9), snakelike coil (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646673.XA CN103616441A (en) | 2013-12-02 | 2013-12-02 | Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310646673.XA CN103616441A (en) | 2013-12-02 | 2013-12-02 | Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material |
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| Publication Number | Publication Date |
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| CN103616441A true CN103616441A (en) | 2014-03-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201310646673.XA Pending CN103616441A (en) | 2013-12-02 | 2013-12-02 | Electromagnetic ultrasonic signal excitation device applied to ferromagnetic material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122330A (en) * | 2014-07-22 | 2014-10-29 | 华中科技大学 | Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves |
| CN110568060A (en) * | 2019-10-15 | 2019-12-13 | 厦门大学 | Coil self-excited ferromagnetic pipeline electromagnetic ultrasonic transducer, excitation device and receiving device |
-
2013
- 2013-12-02 CN CN201310646673.XA patent/CN103616441A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104122330A (en) * | 2014-07-22 | 2014-10-29 | 华中科技大学 | Pipeline defect detection method and device based on electromagnetic ultrasonic longitudinal guided waves |
| CN104122330B (en) * | 2014-07-22 | 2016-08-17 | 华中科技大学 | Defect inspection method and apparatus based on electromagnetic acoustic longitudinal wave guide |
| CN110568060A (en) * | 2019-10-15 | 2019-12-13 | 厦门大学 | Coil self-excited ferromagnetic pipeline electromagnetic ultrasonic transducer, excitation device and receiving device |
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Addressee: Tianjin Polytechnic University Document name: Notification that Application Deemed to be Withdrawn |
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Application publication date: 20140305 |
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