CN102506781B - Laser ultrasonic thickness measuring method and laser ultrasonic thickness measuring device capable of being used for field detection - Google Patents
Laser ultrasonic thickness measuring method and laser ultrasonic thickness measuring device capable of being used for field detection Download PDFInfo
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- CN102506781B CN102506781B CN201110364359.3A CN201110364359A CN102506781B CN 102506781 B CN102506781 B CN 102506781B CN 201110364359 A CN201110364359 A CN 201110364359A CN 102506781 B CN102506781 B CN 102506781B
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Abstract
The invention discloses a laser ultrasonic thickness measuring method and a laser ultrasonic thickness measuring device capable of being used for field detection. The laser ultrasonic thickness measuring method is characterized in that a laser beam is sent out by a laser to excite an ultrasonic wave on the surface in a specific position of a measured object; meanwhile, an excited wave signal and an echo wave signal produced on the surface in the position are received by an air coupling sensor on the same side of the measured object as the laser; and the propagation distance of the ultrasonic wave is calculated according to the time difference between the excited wave signal and the echo wave signal, and a longitudinal wave propagation velocity of the measured object, so that thickness measurement of the specific position is realized. The device mainly comprises the laser, a main supporting seat, the air coupling sensor, a supporting rod, a centering device, a signal processing system and a display system. The device has a simple and light structure, and can meet the requirements of field detection; and through the adoption of the non-contact type detection method, the thicknesses of high temperature and high-corrosive measured objects can be measured.
Description
Technical field
The method and the device that the present invention relates to a kind of laser-ultrasound thickness measuring for Site Detection, the method and equipment belong to field of non destructive testing.
Technical background
Common audiogage is probe need to be in direct contact with on the measured object surface of painting body overcoupling agent to carry out thickness measuring work, but its probe used can not contact the testee of high temperature or highly corrosive material.In the enterprise of chemical plant or other working pressure container, when container and section of tubing running, can produce higher heat, can not detect with common contact probe, and Test Field pipeline, the equipment complexity of arranging, owing to there will be local narrow and small, the more high situation in detection position, testing personnel cannot approach testee.Generation for above-mentioned situation just need to be used non-contact detection equipment.
The principle of laser-ultrasound is laser and tested material direct effect, by thermoelastic effect or ablation process, produces ultrasound wave.A kind of method that the patent No. provides laser-ultrasound detecting for detection of high-temperature pipe to detect for CN00809253.2, utilize two laser instruments, one is used for being created at the specific generation point of described tube surface propagate in tube wall ultrasonic, another is coupled with an interferometer ultrasonic echo producing on a check point on described surface for detecting, but this device is used two laser instrument costs higher, and be unsuitable for Site Detection, this patent is used the mode of laser instrument and Air Coupling sensor combinations, reduced cost, use centering device to adapt to different testing environments, the dirigibility that device detects is increased, overcome above deficiency.
Summary of the invention
The method and the device that the invention provides a kind of laser-ultrasound thickness measuring of Site Detection, have more and say, is method and the device that utilizes laser pumping ultrasonic signal, utilizes the non-contact measurement thickness of Air Coupling sensor reception signal.
Its method is to be sidelong and to put laser instrument at one of testee, is being placed with Air Coupling sensor with laser instrument the same side.The signal receiving plane of this Air Coupling sensor is tiltedly for surface, detection position, by regulating the front and back position of pole, make to be arranged in that main bearing and upper two miniature lasers of pole send is formed on overlapping to heart hot spot on tested object plane, at this moment Air Coupling sensor can encourage ultrasonic position over against laser instrument, laser instrument gives off laser beam, this laser beam irradiation is at the needs detection place excitation ultrasound ripple of measured object, Air Coupling sensor just can receive echoed signal in the surperficial field wave signal producing of laser pumping measured object and measured object, signal is sent into signal processing system from Air Coupling sensor, by the longitudinal wave propagation velograph of the mistiming between field wave signal and echoed signal and testee, calculated the distance of ultrasonic propagation, the ultrasonic propagation distance of calculating with the mistiming is the thickness of testee divided by 2 again, this just realizes the thickness measure of this specific location, and by signal display system, the thickness of testee is shown.
Air Coupling sensor is placed on from laser-ultrasound and produces in the 20mm of position, laser instrument can be placed on the place away from measured object, and both link together by mechanism and utilize centering device to carry out center aligning and guarantee that laser-ultrasound produces position and overlaps with detected position.
The device of laser-ultrasound thickness measuring, mainly by laser instrument, main bearing, Air Coupling sensor, pole, centering device, signal processing system and display system form.Laser instrument and sensor pole are arranged on main bearing, are provided with a guide rail parallel with laser beam on main bearing, and the rear end of pole is arranged on guide rail and can on guide rail, slides front and back, and the front end of pole is furnished with Air Coupling sensor.Centering device is comprised of two miniature lasers, and one is arranged in pole above, and its radiation direction is parallel with the direction that Air Coupling sensor receives signal, and another is arranged on main bearing, and its radiation direction is parallel with the direction of laser instrument Emission Lasers.Signal processing system is connected with Air Coupling sensor, and signal display system is connected the thickness that can directly show measured object with signal processing system.Centering device is wherein comprised of two miniature lasers, and miniature laser can be also ordinary light source.The device of this laser-ultrasound thickness measuring also comprises high-temp. measurer, is used for measuring near the temperature of check point, to determine the velocity of sound of material under Current Temperatures.
Advantage of the present invention exists:
1) use contactless detection method, avoided the situation of the constraint that brings to testing by force due to high temperature or the corrosivity of testee, can only in measured object one side, complete detection.
2) lower, simple in structure, easy to operate than other laser thickness measuring apparatus cost, be easy to carry, can adapt to the requirement of Site Detection.
3) laser instrument can be positioned over the place far away apart from measured object, only by extending pole, make Air Coupling sensor approach testee, just can complete, detection position more high testing personnel narrow and small in place and cannot approach the testing in the situations such as testee.
figure of description
The structural drawing of Fig. 1 laser-ultrasound measuring thickness device.
1. main bearing 11. guide rails of 6. pairs of heart hot spots of testee 2. laser instrument 3. Air Coupling sensor 4. pole 5. centering devices, 7. laser beam 8. receiving system 9. signal display system 10..
Embodiment
Laser-ultrasound measuring thickness device as shown in Figure 1, mainly by laser instrument 2, main bearing 10, Air Coupling sensor 3, pole 4, centering device 5, signal processing system 8 forms with display system 9.Laser instrument 2 is arranged on main bearing with passing pole 4, is provided with a guide rail parallel with laser beam 11 on main bearing, and the rear end of pole 4 is arranged on guide rail 11 and can on guide rail, slides front and back, and the front end of pole 4 is furnished with Air Coupling sensor 3.Centering device is comprised of two miniature lasers, and one is arranged on pole 4, and its radiation direction is parallel with the direction that Air Coupling sensor 3 receives signal, and another is arranged on main bearing 10, and its radiation direction is parallel with the direction of laser instrument Emission Lasers.Signal processing system 8 is connected with Air Coupling sensor, and signal display system 9 is connected 8 thickness that can directly show measured object with signal processing system.
Before detection, by dimensional measurement, regulate the position of centering device 5, guarantee when heart hot spot 6 is overlapped, Air Coupling sensor 3 is detected position (be laser ultrasonic and produce position) over against needs.According to Site Detection actual conditions this device by hand-held or be arranged on the method for support, be placed on before testee 1, by the surface that thickness is the measured object 1 of 10cm that is right against of laser instrument 2, make the light beam 7 can vertical radiation measured objects surface.Operation centering device 5, regulate the front and back position of pole 4, what make to be arranged on main bearing 10 and pole 4 that two miniature lasers send is formed on overlapping to heart hot spot 6 on 1 of measured object, at this moment Air Coupling sensor 3 is over against the laser instrument 1 ultrasonic position of excitation, make laser instrument 2 give off laser beam 7, these laser beam 7 irradiation are at the measured object 1 surface excitation ultrasound wave of measured object 1, Air Coupling sensor 3 just can receive echoed signal in the surperficial field wave signal producing of laser pumping measured object and measured object, signal is sent into signal processing system 8 from Air Coupling sensor, receive to obtain the poor t on time shaft of field wave signal and echoed signal, simultaneously again by the longitudinal wave velocity C of testee material under Current Temperatures, with the mistiming, be that t is multiplied by longitudinal wave velocity C again divided by 2 thickness that obtain testee, and by signal display system 9, the thickness of testee is shown.
Air Coupling sensor 3 is placed on from laser-ultrasound and produces in the 20mm of position, laser instrument can be placed on the place away from measured object 1, both link together by mechanism and utilize centering device 5 to carry out center aligning and guarantee that laser-ultrasound produces position and overlaps with detected position, in device centering device 5 by two miniature lasers, formed, miniature laser can be also ordinary light source.The device of this laser-ultrasound thickness measuring also comprises high-temp. measurer, is used for measuring near the temperature of check point, to determine the velocity of sound of material under Current Temperatures.
Claims (6)
1. for a device for the laser-ultrasound thickness measuring of Site Detection, it is characterized in that, by laser instrument (2), main bearing (10), Air Coupling sensor (3), pole (4), centering device (5), signal processing system (8) forms with display system (9); Described laser instrument (2) is arranged on main bearing (10) with pole (4), on main bearing (10), be provided with a guide rail (11) that the laser beam sending with laser instrument (2) is parallel, the rear end of pole (4) is arranged on guide rail (11) and above and before and after on guide rail slides, the front end of pole (4) is provided with Air Coupling sensor (3), and the signal receiving plane of described Air Coupling sensor (3) is tiltedly for surface, needs detection position; Centering device (5) is comprised of two miniature lasers, one is arranged on pole (4), its radiation direction is parallel with the direction that Air Coupling sensor (3) receives signal, and it is upper that another is arranged in main bearing (10), and its radiation direction is parallel with the direction of laser instrument Emission Lasers; Signal processing system (8) is connected with Air Coupling sensor, and signal display system (9) is connected the thickness that (8) directly show measured object with signal processing system.
2. the device of the laser-ultrasound thickness measuring for Site Detection according to claim 1, is characterized in that, described Air Coupling sensor (3) is placed on distance to be needed in the 20mm of surface, detection position, and laser instrument (2) is placed on the place away from measured object.
3. the device of the laser-ultrasound thickness measuring for Site Detection according to claim 1 and 2, is characterized in that, also comprises high-temp. measurer, measures near the temperature of check point.
4. the device of the laser-ultrasound thickness measuring for Site Detection according to claim 1 and 2, is characterized in that, described two miniature lasers are ordinary light source.
5. a method of utilizing the device of the laser-ultrasound thickness measuring for Site Detection described in claim 1, it is characterized in that, by dimensional measurement, regulate the position of centering device (5), when heart hot spot (6) is overlapped, Air Coupling sensor (3) is detected position over against needs, stentplacement is front at testee (1), laser instrument (2) is right against to the surface of measured object (1), make the light beam (7) can vertical radiation measured object surface, operation centering device (5), regulate the front and back position of pole (4), two miniature lasers are arranged on main bearing (10) and pole (4), send the overlapping on measured object (1) face to heart hot spot (6) of formation, at this moment Air Coupling sensor (3) encourages ultrasonic position over against laser instrument (2), make laser instrument (2) give off laser beam (7), laser beam (7) irradiation is at the surface excitation ultrasound wave of measured object (1), Air Coupling sensor (3) receives echoed signal in the surperficial field wave signal producing of laser pumping measured object and measured object, signal is sent into signal processing system (8) from Air Coupling sensor, receive to obtain the poor t on time shaft of field wave signal and echoed signal, simultaneously again by the longitudinal wave velocity C of testee material under Current Temperatures, the thickness that obtains testee is tC/2, and by signal display system (9), the thickness of testee is shown.
6. the method for the laser-ultrasound thickness measuring for Site Detection according to claim 5, is characterized in that, by near temperature high-temp. measurer measurement check point, determines the velocity of sound of material under Current Temperatures.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075981B (en) * | 2012-12-31 | 2016-01-20 | 汕头市超声仪器研究所有限公司 | A kind of ultrasonic thickness test method |
| CN105675474B (en) * | 2014-11-21 | 2018-10-23 | 中国海洋石油集团有限公司 | A method of detection pipe fitting extent of corrosion |
| CN104729435B (en) * | 2015-03-13 | 2017-06-13 | 浙江大学 | Sheet metal thickness on-line measurement system based on laser-ultrasound |
| CN104707871B (en) * | 2015-03-16 | 2016-08-24 | 浙江大学 | Sheet metal thickness on-line checking based on laser-ultrasound and the system of adjustment |
| CN104990521A (en) * | 2015-06-23 | 2015-10-21 | 烟台富润实业有限公司 | Non-contact type composite material thickness measurement device and method |
| CN105277571B (en) * | 2015-06-25 | 2018-06-26 | 浙江大学 | A kind of rotating shaft surface crackle on-line detecting system and detection method |
| CN106441119A (en) * | 2016-06-30 | 2017-02-22 | 山东省科学院激光研究所 | Thermal-state steel tube thickness online detection device |
| CN106441176B (en) * | 2016-10-12 | 2019-04-02 | 苏州博昇科技有限公司 | A kind of method of Air Coupling ultrasound examination film thickness |
| CN109387568A (en) * | 2018-12-21 | 2019-02-26 | 西安增材制造国家研究院有限公司 | A kind of laser ultrasonic detection device and increasing material manufacturing, detection integrated equipment |
| CN109813241B (en) * | 2019-03-21 | 2024-03-19 | 马鞍山恒瑞测量设备有限公司 | Thickness gauge special for hot rolled strip steel |
| CN109855576A (en) * | 2019-03-27 | 2019-06-07 | 大连理工大学 | Large-scale siding ultrasound is in the non-contact scanning thickness measuring equipment of machine and thickness measuring method |
| CN110672047B (en) * | 2019-10-16 | 2021-09-21 | 江苏省特种设备安全监督检验研究院 | Laser ultrasonic measurement method for thickness of high-temperature metal material |
| CN114812457B (en) * | 2022-06-28 | 2022-09-23 | 太原理工大学 | Light path alignment self-adjusting laser ultrasonic metal composite plate thickness measuring device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109628A (en) * | 2006-07-20 | 2008-01-23 | 国际商业机器公司 | Method for measuring thin layers in solid state devices |
| CN102003951A (en) * | 2009-09-01 | 2011-04-06 | 黄石新兴管业有限公司 | All-pipe water immersion type ultrasonic automatic detector for nodular cast iron pipes |
| CN102109333A (en) * | 2009-12-23 | 2011-06-29 | 中国科学院沈阳计算技术研究所有限公司 | Small-curvature radius complex curved surface intelligent ultrasonic thickness measurement system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06347250A (en) * | 1993-06-04 | 1994-12-20 | Asahi Eng Co Ltd | Plate-thickness measuring apparatus |
| DE10236756A1 (en) * | 2002-08-10 | 2004-02-19 | Sms Meer Gmbh | Device for measuring the wall thickness of a pipe in a rolling mill has lamp emitting a bundled light and fixed to different sites on a measuring head |
| KR100832839B1 (en) * | 2006-08-25 | 2008-05-28 | 한양대학교 산학협력단 | Thickness measurement instrumentation and method using ultrasonic longitudinal wave and shear wave |
| US8054470B2 (en) * | 2008-05-15 | 2011-11-08 | Lockheed Martin Corporation | Method and apparatus for spectroscopic characterization of samples using a laser-ultrasound system |
-
2011
- 2011-11-17 CN CN201110364359.3A patent/CN102506781B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101109628A (en) * | 2006-07-20 | 2008-01-23 | 国际商业机器公司 | Method for measuring thin layers in solid state devices |
| CN102003951A (en) * | 2009-09-01 | 2011-04-06 | 黄石新兴管业有限公司 | All-pipe water immersion type ultrasonic automatic detector for nodular cast iron pipes |
| CN102109333A (en) * | 2009-12-23 | 2011-06-29 | 中国科学院沈阳计算技术研究所有限公司 | Small-curvature radius complex curved surface intelligent ultrasonic thickness measurement system |
Non-Patent Citations (4)
| Title |
|---|
| 《基于超声的筒状物体测厚系统研究》;王振江;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》;20110515;C030-64 * |
| 杜丽婷,刘松平.《激光超声检测技术》.《无损探伤》.2011,第35卷(第5期),1-3. * |
| 王振江.《基于超声的筒状物体测厚系统研究》.《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》.2011,C030-64. |
| 陈祯，彭光俊，蔡兰.《一种新型的超声在线测厚仪》.《仪表技术》.2002,25-26. * |
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Effective date of registration: 20190114 Address after: 211300 No. 31 Maoshan Road, Gaochun Development Zone, Nanjing City, Jiangsu Province Patentee after: Nanjing Chun Jiang mechanical and electrical equipment Technology Co., Ltd. Address before: No. 301, Xuefu Road, Jingkou District, Zhenjiang, Jiangsu Province Patentee before: Jiangsu University |
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Effective date of registration: 20201126 Address after: 226215 10 group, four floor village, cooperation Town, Qidong City, Nantong, Jiangsu. Patentee after: NANTONG QIWU AGRICULTURAL PRODUCTS Co.,Ltd. Address before: No.31, Maoshan Road, Gaochun Development Zone, Nanjing Patentee before: NANJING JIANGCHUN ELECTROMECHANICAL EQUIPMENT TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20220316 Address after: 226000 Binhai Industrial Zone, HaiHai Town, Qidong City, Nantong City, Jiangsu Province (in Jiangsu Zhongxing Yongda Refrigeration Machinery Manufacturing Co., Ltd.) Patentee after: Qidong Rongyu Machinery Co.,Ltd. Address before: 226215 10 group, four floor village, cooperation Town, Qidong City, Nantong, Jiangsu. Patentee before: NANTONG QIWU AGRICULTURAL PRODUCTS Co.,Ltd. |
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