CN102200529B - Ultrasonic transducer for detecting by insertion into stainless steel corrugated pipe - Google Patents
Ultrasonic transducer for detecting by insertion into stainless steel corrugated pipe Download PDFInfo
- Publication number
- CN102200529B CN102200529B CN201110072122A CN201110072122A CN102200529B CN 102200529 B CN102200529 B CN 102200529B CN 201110072122 A CN201110072122 A CN 201110072122A CN 201110072122 A CN201110072122 A CN 201110072122A CN 102200529 B CN102200529 B CN 102200529B
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- China
- Prior art keywords
- ultrasonic transducer
- iron core
- corrugated pipe
- stainless steel
- enameled wire
- Prior art date
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- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 19
- 239000010935 stainless steel Substances 0.000 title claims abstract description 19
- 238000003780 insertion Methods 0.000 title abstract description 3
- 230000037431 insertion Effects 0.000 title abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 13
- 230000007547 defect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000452 restraining effect Effects 0.000 description 2
- BLRBOMBBUUGKFU-SREVYHEPSA-N (z)-4-[[4-(4-chlorophenyl)-5-(2-methoxy-2-oxoethyl)-1,3-thiazol-2-yl]amino]-4-oxobut-2-enoic acid Chemical compound S1C(NC(=O)\C=C/C(O)=O)=NC(C=2C=CC(Cl)=CC=2)=C1CC(=O)OC BLRBOMBBUUGKFU-SREVYHEPSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention discloses an ultrasonic transducer for detecting by insertion into a stainless steel corrugated pipe. The ultrasonic transducer is arranged at one end in the corrugated pipe; a permanent magnet (2) is inserted into an iron core (3) in the corrugated pipe (1); a plurality of isolation steps are arranged at both ends and on the middle part of the outer surface of the iron core (3); an enameled wire encircles a part between every two adjacent isolation steps; the enameled wire changes the encircling direction after passing through one isolation step; and two permanent magnets (2) are absorbed on both sides of the iron core (3). In the ultrasonic transducer, a bias magnetic field is produced in the iron core by using the permanent magnet; when alternating voltage is exerted at both ends of the enameled wire, partial mechanical vibration is generated in the corrugated pipe so as to realize detection of the whole corrugated pipe. The ultrasonic transducer is inserted into the corrugated pipe for long-distance detection; a detection signal is simple and clear and convenient to analyze, so the detection cost is reduced; moreover, the ultrasonic transducer is applicable to service condition detection of the stainless steel corrugated pipe in industrial spots with large pipe bundle density and compact space distribution.
Description
Technical field
The present invention relates to a kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts; Belong to the acoustic sensor technical field; Its effect is to convert the electromagnetic energy that sensor produces to mechanical energy (acoustic energy) through corrugated tube, and comes defective to corrugated stainless steel tubing to have or not etc. through the analysis to mechanical energy (acoustic energy) and detect.
Background technology
Now, carry out Non-Destructive Testing for the condenser corrugated stainless steel tubing and mainly adopt eddy detection technology.But in actual detected, adopt the eddy-current test method to need pointwise to survey, time and effort consuming is difficult to carry out large batch of inspection.The tube bank density of corrugated stainless steel tubing is bigger simultaneously, and space distribution is compact, adopts the common method of inspection to be difficult to effectively check.And high economy, the high-level efficiency of real-time status check are absolutely necessary, and therefore need a kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts of design, satisfy the engine request that corrugated tube detects in labour.
Summary of the invention
The objective of the invention is to utilize the supersonic guide-wave technology to realize quick in the condenser corrugated stainless steel tubing, long distance detecting through a kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts is provided.
A kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts of the present invention is to adopt following technological means to realize:
A kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts; Be arranged on the end in the corrugated tube; Permanent magnet 2 inserts the iron core 3 of corrugated tube 1 inside; The two ends of iron core 3 appearances and center section are provided with several and isolate step, and the part between per two adjacent isolation steps is surrounded with enameled wire, whenever change once around direction through an isolation step enameled wire; Two block permanent magnets 2 are adsorbed on the both sides of iron core 3.
The external diameter of aforesaid iron core (3) is identical with inside diameter of bel.
The external diameter of aforesaid permanent magnet (2) is identical with iron core (3) internal diameter.
The present invention compared with prior art has following remarkable advantages and beneficial effect:
The present invention uses permanent magnet in iron core, to produce bias magnetic field; When the enameled wire two ends add alternating voltage,, in corrugated tube, can produce local mechanical vibration according to the electromagnetic field law; This vibration meeting is propagated to both direction from driving source simultaneously; Can reflect when running into corrugated tube end face or fault location, then be received sensor and capture, can realize detection whole corrugated tube.Sensor among the present invention can insert bellows interior and grow distance detecting; Detection signal is simple and clear, be convenient to analyze; And then reduced the detection cost, go for restraining density industry spot big, that space distribution is compact and carry out corrugated stainless steel tubing in the labour condition detection.
Description of drawings
Fig. 1 is an integral installation synoptic diagram of the present invention;
Fig. 2 is the synoptic diagram that coil twines on the iron core 3;
Fig. 3 is for using the synoptic diagram of the reception signal of piezoelectric chip autoexcitation when receiving;
The synoptic diagram of the reception signal when Fig. 4 receives for using piezoelectric chip excitation the present invention.
Among the figure, 1, steel strand wires, 2, permanent magnet, 3, iron core, 4, enameled wire.
Embodiment
Content in conjunction with the inventive method provides embodiment:
The structure of present embodiment is as shown in Figure 1; Comprise permanent magnet 2 and the iron core 3 that inserts corrugated tube 1 inside; Iron core 3 apparent two ends and center section are provided with the isolation step; Part between per two isolation steps all is surrounded with enameled wire 4, whenever just changes once around direction through an isolation step enameled wire 4.Two block permanent magnets 2 are attached to the both sides of iron core 3, and permanent magnet 2 is identical with the external diameter and the inside diameter of bel of iron core 3, so that insert bellows interior and make enameled wire 4 press close to the corrugated tube inwall as far as possible.
The overall diameter 25mm of condenser corrugated stainless steel tubing in the present embodiment, wall thickness is 0.7mm, and pitch is 10mm, and wave height is 0.5mm.Corrugated tube sample length overall is 3780mm, and sensor is installed in apart from corrugated tube straight length end, and piezoelectricity loop complete cycle evenly distributes 16, the long 7mm of selected piezoelectric ceramic wafer, and wide 3mm, thick 0.5mm, oscillatory type are the telescopic type.Produce 20 single audio signals that shake the cycles through the modulation of Hanning window that peak-to-peak value is 300mV by function generator, the frequency of selection is 240kHz.Pumping signal is carried out power amplification through power amplifier; Be carried in piezoelectric chip, and then (0,2) the mode guided wave signals that in corrugated tube, motivates L; This signal can reflect after being transmitted to the corrugated tube end face; Received by ultrasonic transducer then, show, and store in the computing machine through port at digital oscilloscope.
Circumferential crack of processing on corrugated tube; Circumferential lengths 10mm, axial width 0.4mm, the center is apart from the piezoelectricity loop 1500mm of place; Use the reception signal of piezoelectric chip autoexcitation when receiving as shown in Figure 3, the reception signal when using piezoelectric chip excitation the present invention to receive is as shown in Figure 4.Can find out that from test findings except that the end face echo, the crack defect echo is clear and legible, reads the time of arrival of defect waves bag, just can calculate the axial location of defective, promptly realize the identification and the location of defective.The testing result that piezoelectric chip excitation the present invention receives is compared from the testing result that receives with the piezoelectric chip autoexcitation, and the clutter of detection signal is few, and signal to noise ratio (S/N ratio) is high, and just amplitude is less relatively.
Experimental result shows that L (0,2) mode guided wave is suitable for detecting the crack defect in the corrugated tube, and adopts EMAT can further improve testing result, improves sensing range.Experiment show the feasibility of supersonic guide-wave aspect the corrugated tube defects detection; And the ultrasonic transducer of this insertion bellows interior goes for restraining density industry spot big, that space distribution is compact and carries out corrugated stainless steel tubing in the labour condition detection, also establishes certain basis for detecting in labour of corrugated tube.
Claims (3)
1. one kind can be inserted the inner ultrasonic transducer that detects of corrugated stainless steel tubing; Be arranged on the end in the corrugated tube; It is characterized in that: permanent magnet (2) and iron core (3) insert corrugated tube (1) inside; The two ends of iron core (3) appearance and center section are provided with several and isolate step, and the part between per two adjacent isolation steps is surrounded with enameled wire, whenever change once around direction through an isolation step enameled wire; Two block permanent magnets (2) are adsorbed on the two ends of iron core (3) appearance.
2. a kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts according to claim 1, it is characterized in that: the external diameter of described iron core (3) is identical with inside diameter of bel.
3. a kind of inner ultrasonic transducer that detects of corrugated stainless steel tubing that inserts according to claim 1, it is characterized in that: the external diameter of described permanent magnet (2) is identical with iron core (3) internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110072122A CN102200529B (en) | 2011-03-24 | 2011-03-24 | Ultrasonic transducer for detecting by insertion into stainless steel corrugated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110072122A CN102200529B (en) | 2011-03-24 | 2011-03-24 | Ultrasonic transducer for detecting by insertion into stainless steel corrugated pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102200529A CN102200529A (en) | 2011-09-28 |
| CN102200529B true CN102200529B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110072122A Expired - Fee Related CN102200529B (en) | 2011-03-24 | 2011-03-24 | Ultrasonic transducer for detecting by insertion into stainless steel corrugated pipe |
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| Country | Link |
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| CN (1) | CN102200529B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230913A (en) * | 2011-06-25 | 2011-11-02 | 河南电力试验研究院 | Electromagnetic acoustic transducer for detecting condenser stainless steel bellows |
| CN109489735A (en) * | 2018-12-30 | 2019-03-19 | 江苏恒丰波纹管有限公司 | Pipeline compensator intelligent measurement and monitoring system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2503828A1 (en) * | 1975-01-30 | 1976-08-05 | Friedrich Reiner Telefonfabrik | Permanent magnet dynamic electro-acoustic transducer - has toroidal permanent magnet with soft iron core and flange connection |
| CN2367852Y (en) * | 1999-04-22 | 2000-03-08 | 李允文 | Electromagnetic automatic stop safety valve |
| CN2857211Y (en) * | 2005-12-09 | 2007-01-10 | 王季梅 | Drop-out device for large capacity vacuum short-circuit current |
| CN1977564A (en) * | 2004-06-03 | 2007-06-06 | 迪芬尼公司 | Acoustic transducer comprising a plurality of coaxially arranged diaphragms |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006014255A (en) * | 2004-06-24 | 2006-01-12 | Michiyuki Shimizu | Apparatus 2 to transmit delicate vibration of sound to skin |
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2011
- 2011-03-24 CN CN201110072122A patent/CN102200529B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2503828A1 (en) * | 1975-01-30 | 1976-08-05 | Friedrich Reiner Telefonfabrik | Permanent magnet dynamic electro-acoustic transducer - has toroidal permanent magnet with soft iron core and flange connection |
| CN2367852Y (en) * | 1999-04-22 | 2000-03-08 | 李允文 | Electromagnetic automatic stop safety valve |
| CN1977564A (en) * | 2004-06-03 | 2007-06-06 | 迪芬尼公司 | Acoustic transducer comprising a plurality of coaxially arranged diaphragms |
| CN2857211Y (en) * | 2005-12-09 | 2007-01-10 | 王季梅 | Drop-out device for large capacity vacuum short-circuit current |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2006-14255A 2006.01.12 |
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| CN102200529A (en) | 2011-09-28 |
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Granted publication date: 20120905 |