CN205157493U - Sheet metal crazing line ultrasonic testing positioner - Google Patents
Sheet metal crazing line ultrasonic testing positioner Download PDFInfo
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- CN205157493U CN205157493U CN201520844556.9U CN201520844556U CN205157493U CN 205157493 U CN205157493 U CN 205157493U CN 201520844556 U CN201520844556 U CN 201520844556U CN 205157493 U CN205157493 U CN 205157493U
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- sheet metal
- vibration isolation
- ultrasonic sensor
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Abstract
The utility model relates to a sheet metal crazing line ultrasonic testing positioner. The utility model discloses it constitutes to control probe, vibration isolation platform, ultrasonic sensor, signal generator, computer and oscilloscope mutually by the accurate motion of three -dimensional, support, two -dimentional annular. Three -dimensional accurate motion lay and be used for placing the vibration isolation platform of waiting to examine sheet metal, two dimension annular mutually the accuse probe be located and wait to examine sheet metal directly over, and fixed by the one end of U type support, the other end of U type support is fixed on a border of vibration isolation platform, still be provided with ultrasonic sensor simultaneously on this border, ultrasonic sensor's output is connected to oscilloscope's signal input part, and oscilloscope's signal output part is connected with the input of computer, and the output of computer is connected with signal generator's input, and probe connection is controlled mutually to signal generator's output and two -dimentional annular. The utility model discloses simple structure can realize quick, low -cost detection.
Description
Technical field
The utility model belongs to detection technique field, is specifically related to a kind of sheet metal micro-crack Ultrasonic Detection locating device.
Background technology
Conventional Ultrasound detection method is detected by the linear feature such as reflection, decay, transmission of transmitting signal, but because the reflection echo intensity of micro-crack is low, transmissivity is high, decay the reason such as little, causes conventional Ultrasound detection method insensitive to micro-crack.Domestic and international researcher finds that the non-linear behavior that material internal fatigue damage causes well can be reflected by non-linear ultrasonic detection method.It is when utilizing ultrasound wave to propagate in the material that non-linear ultrasonic detects, the nonlinear response signal that medium or tiny flaw and its interaction produce, and carries out the assessment of material property and the detection of tiny flaw.Chatter modulation is the one in non-linear ultrasonic detection method, by high-frequency ultrasonic and microcrack interaction, two row sound waves just can be made to produce Non-linear coupling.It has higher sensitivity to contact deficiency, may be used for detection of complex constitutional detail and large-scale component and structure far-end thereof, so receiving increasing concern.But non-linear ultrasonic detection method can only detect the existence of micro-crack, the location to micro-crack can not be realized.
Research shows, can compensate the sound wave that the frequency dispersion of supersonic guide-wave, multi-mode and multipath effect cause time reversal and defocuses and distort, not need the priori of propagation medium and transducer array just can realize the adapted local cosine transform of acoustic wave energy.Therefore, Ultrasonic Detection and time reversal are combined the location and Enhanced Imaging that realize damage, become a study hotspot in recent years.After referring to that sensor array receives the signal of source emission time reversal, again launched by corresponding receiving sensor unit respectively again after being carried out time domain reversion, namely send out after arriving first, arrive afterwards and first send out, that different array element sends, sound source position will be arrived along the signal of different propagated simultaneously, produce superposition and focus on.
Utilize Nonlinear acoustic wave imperfection sensitivity and time reversal sound wave self-focusing characteristic, nonlinear acoustics and time reversal acoustics combine and be applied to the microcrack zone of sheet metal, realize the accurate quantitative analysis to defect and location, have important practical value.
With the key of time reversal determination micro-crack position be determine in structure time anti-acoustic wave energy space distribution, be generally utilize laser vibration measurer solid plate surface to be scanned to the distribution judging acoustic wave energy now.This installation cost is high, complicated operation, and impracticable.
Summary of the invention
The utility model, for the deficiencies in the prior art, provides a kind of sheet metal micro-crack Ultrasonic Detection locating device.
For overcoming the above problems, the utility model have employed following technological means:
The utility model is made up of three-dimensional precise motion, support, two-dimensional annular phased array transducer, vibration isolation table, ultrasonic sensor, signal generator, computing machine and oscillograph.
The vibration isolation table for placing sheet metal to be checked is equipped with at described three-dimensional precise motion, described two-dimensional annular phased array transducer is positioned at directly over sheet metal to be checked, and fixed by one end of U-shaped support, the other end of U-shaped support is fixed on an edge of vibration isolation table; This edge is also provided with ultrasonic sensor simultaneously, the output terminal of described ultrasonic sensor is connected to oscillographic signal input part, oscillographic signal output part is connected with the input end of computing machine, the output terminal of computing machine is connected with the input end of signal generator, and the output terminal of signal generator is connected with two-dimensional annular phased array transducer.
The beneficial effects of the utility model are: the utility model structure is simple, adopt vibration isolation table can effectively avoid shielding extraneous vibration on measure the impact that brings, simultaneously two-dimensional annular phased array transducer and ultrasonic sensor the signal characteristic change that effectively can detect fine crack and bring is set, thus realize fast, the detection of low cost.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, the present embodiment is made up of three-dimensional precise motion 1, support 2, two-dimensional annular phased array transducer 3, vibration isolation table 4, ultrasonic sensor 5, signal generator 6, computing machine 7 and oscillograph 8.
Being equipped with the vibration isolation table for placing sheet metal to be checked at three-dimensional precise motion, because defect is inherently very tiny, so extraneous interference must be shielded, preventing effective signal intensity to be fallen into oblivion.Two-dimensional annular phased array transducer is positioned at directly over sheet metal to be checked, and is fixed by one end of U-shaped support, and the other end of U-shaped support is fixed on an edge of vibration isolation table; This edge has also been horizontally disposed with ultrasonic sensor simultaneously, the output terminal of ultrasonic sensor is connected to oscillographic signal input part, oscillographic signal output part is connected with the input end of computing machine, the output terminal of computing machine is connected with the input end of signal generator, and the output terminal of signal generator is connected with two-dimensional annular phased array transducer.
The course of work of the present embodiment: utilize signal generator to produce high-frequency signal, this signal is input to two-dimensional annular phased array transducer 3 and produces focus supersonic excitation, aluminium sheet to be measured is driven by three-dimensional precise motion 1, make ultrasonic sensor can find suitable acceptance point, receive the high frequency harmonic signals after interacting with fine crack in aluminium sheet by ultrasonic sensor 5 again, finally send computing machine 7 to by oscillograph 8 collection.Carry out filtering first-harmonic to the signal collected, leave the characteristic signal produced by crackle, and characteristic signal is carried out time domain reversion, anti-characteristic signal when the receiving sensor on identical point applies also emulates.The last cloud atlas observing test specimen in abaqus software post-processing module, the position of crackle just can be determined in the position focused on by designature.
Claims (1)
1. a sheet metal micro-crack Ultrasonic Detection locating device, is characterized in that: be made up of three-dimensional precise motion, support, two-dimensional annular phased array transducer, vibration isolation table, ultrasonic sensor, signal generator, computing machine and oscillograph;
The vibration isolation table for placing sheet metal to be checked is equipped with at described three-dimensional precise motion, described two-dimensional annular phased array transducer is positioned at directly over sheet metal to be checked, and fixed by one end of U-shaped support, the other end of U-shaped support is fixed on an edge of vibration isolation table; This edge is also provided with ultrasonic sensor simultaneously, the output terminal of described ultrasonic sensor is connected to oscillographic signal input part, oscillographic signal output part is connected with the input end of computing machine, the output terminal of computing machine is connected with the input end of signal generator, and the output terminal of signal generator is connected with two-dimensional annular phased array transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844556.9U CN205157493U (en) | 2015-10-28 | 2015-10-28 | Sheet metal crazing line ultrasonic testing positioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520844556.9U CN205157493U (en) | 2015-10-28 | 2015-10-28 | Sheet metal crazing line ultrasonic testing positioner |
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| Publication Number | Publication Date |
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| CN205157493U true CN205157493U (en) | 2016-04-13 |
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| CN201520844556.9U Expired - Fee Related CN205157493U (en) | 2015-10-28 | 2015-10-28 | Sheet metal crazing line ultrasonic testing positioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954356A (en) * | 2016-05-03 | 2016-09-21 | 中国计量大学 | Finite amplitude technology-based metal block closed crack detecting and positioning method |
| CN106018551A (en) * | 2016-05-03 | 2016-10-12 | 中国计量大学 | Aluminum pipe defect detecting and positioning method based on multi-channel time reversal method |
| CN106124623A (en) * | 2016-06-20 | 2016-11-16 | 哈尔滨理工大学 | Sheet metal micro-crack identification and alignment system and detection method based on this system |
| CN113855071A (en) * | 2021-09-28 | 2021-12-31 | 核工业总医院 | Improved ultrasonic diagnostic apparatus and method of displaying ultrasonic image |
-
2015
- 2015-10-28 CN CN201520844556.9U patent/CN205157493U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954356A (en) * | 2016-05-03 | 2016-09-21 | 中国计量大学 | Finite amplitude technology-based metal block closed crack detecting and positioning method |
| CN106018551A (en) * | 2016-05-03 | 2016-10-12 | 中国计量大学 | Aluminum pipe defect detecting and positioning method based on multi-channel time reversal method |
| CN105954356B (en) * | 2016-05-03 | 2018-11-16 | 中国计量大学 | A kind of metal block closure crack detection localization method based on limited amplitude method |
| CN106124623A (en) * | 2016-06-20 | 2016-11-16 | 哈尔滨理工大学 | Sheet metal micro-crack identification and alignment system and detection method based on this system |
| CN113855071A (en) * | 2021-09-28 | 2021-12-31 | 核工业总医院 | Improved ultrasonic diagnostic apparatus and method of displaying ultrasonic image |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160413 Termination date: 20171028 |