CN212340975U - Laser composite system integrating cleaning, polishing and ultrasonic detection - Google Patents
Laser composite system integrating cleaning, polishing and ultrasonic detection Download PDFInfo
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- CN212340975U CN212340975U CN202021485657.9U CN202021485657U CN212340975U CN 212340975 U CN212340975 U CN 212340975U CN 202021485657 U CN202021485657 U CN 202021485657U CN 212340975 U CN212340975 U CN 212340975U
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- 238000005498 polishing Methods 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title claims abstract description 29
- 238000004140 cleaning Methods 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 230000007547 defect Effects 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 9
- 230000003287 optical effect Effects 0.000 claims description 31
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 238000002604 ultrasonography Methods 0.000 description 5
- 238000009659 non-destructive testing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The utility model relates to a laser composite system integrating cleaning, polishing and ultrasonic detection, which comprises a control module, a first laser transmitter, a second laser transmitter and a laser ultrasonic receiver, wherein the first laser transmitter, the second laser transmitter and the laser ultrasonic receiver are electrically connected with the control module; the first laser emitter is used for emitting laser pulses to the surface of the detected workpiece under the control of the control module so as to carry out laser cleaning and laser polishing on the surface of the detected workpiece; the second laser transmitter is used for transmitting laser pulses to the detected workpiece under the control of the control module and exciting laser ultrasonic signals on the surface of the detected workpiece; the laser ultrasonic receiver is used for receiving laser ultrasonic signals excited by the surface of the detected workpiece, converting the received laser ultrasonic signals into electric signals and transmitting the electric signals to the control module for processing, so that the surface defects of the detected workpiece are detected. The utility model discloses can improve and detect the precision, enlarge the scope that laser supersound detected, avoid introducing high voltage risk, safe and reliable.
Description
Technical Field
The utility model relates to a laser and supersound technical field, concretely relates to collect and wash, polish and ultrasonic testing in laser composite system of an organic whole.
Background
The ultrasonic nondestructive testing technology comprises traditional contact ultrasonic nondestructive testing and laser ultrasonic nondestructive testing. The contact ultrasonic nondestructive testing adopts a contact ultrasonic transducer as a probe for ultrasonic excitation and receiving, and is required to be in contact with a material to be tested, and a coupling agent is usually required to be coated to improve the ultrasonic coupling effect. Laser ultrasound is a non-contact, high-precision, non-destructive novel ultrasonic detection technology. It uses laser pulse to excite ultrasonic wave in the detected workpiece, and uses laser beam to detect the propagation of ultrasonic wave so as to obtain workpiece information, such as workpiece thickness, internal and surface defects, material parameters, etc. The technology combines the advantages of high precision of ultrasonic detection and non-contact of optical detection, and has the advantages of high sensitivity (sub-nanometer level) and high detection bandwidth (GHz).
The detection method of laser ultrasound in the laser ultrasound detection technology comprises a non-interference method and an interference method, wherein the non-interference method mainly adopts an optical deflection technology, and the measurement of the interference method is realized based on phase or frequency modulation of an interferometer link caused by ultrasound. Interferometers capable of realizing ultrasonic detection include heterodyne interferometers, time delay interferometers, confocal fabry-perot interferometers, double-wave hybrid interferometers, photo-induced electromotive force interferometers and the like. Among them, heterodyne interferometer and time delay interferometer usually require the detection surface to have better smoothness. The confocal Fabry-Perot interferometer can be suitable for a rough surface, has better sensitivity to intermediate frequency noise, but has the defects of insensitivity to low-frequency signals, high-frequency response nonlinearity and the like. The double-wave hybrid interferometer and the light induced electromotive force interferometer introduce nonlinear optical crystals to realize phase correction of the rough surface, and can realize ultrasonic detection of the rough surface. However, the dual-wave hybrid interferometer requires a high kV voltage to be applied to the nonlinear optical crystal, resulting in a very complex system and a large safety hazard.
SUMMERY OF THE UTILITY MODEL
To the problem in the background art, the utility model aims to solve the difficult problem that rough surface leads to defect detection sensitivity to be low, reduce the requirement to workpiece surface roughness in the laser supersound application.
In order to solve the technical problem, the utility model discloses the technical scheme who takes does:
a laser composite system integrating cleaning, polishing and ultrasonic detection comprises a control module, a first laser transmitter, a second laser transmitter and a laser ultrasonic receiver, wherein the first laser transmitter, the second laser transmitter and the laser ultrasonic receiver are electrically connected with the control module;
the first laser emitter is used for emitting laser pulses to the surface of the detected workpiece under the control of the control module so as to carry out laser cleaning and laser polishing on the surface of the detected workpiece;
the second laser transmitter is used for transmitting laser pulses to the detected workpiece under the control of the control module and exciting laser ultrasonic signals on the surface of the detected workpiece;
the laser ultrasonic receiver is used for receiving laser ultrasonic signals excited by the surface of the detected workpiece, converting the received laser ultrasonic signals into electric signals and transmitting the electric signals to the control module for processing, so that the surface defects of the detected workpiece are detected.
In some embodiments, the laser ultrasonic receiver comprises an optical interferometer and a photodetector, the optical interferometer is used for modulating the laser ultrasonic signal containing the detected workpiece surface defect information into an optical signal, and the photodetector is used for converting the modulated optical signal into an electrical signal and transmitting the electrical signal to the control module.
In some embodiments, the optical interferometer in the laser ultrasound receiver is a dual wavelength optical interferometer, an F-P cavity interferometer, or a heterodyne interferometer.
In some embodiments, the laser scanning device further comprises a scanning galvanometer module, wherein a light inlet end of the scanning galvanometer module faces a laser emitting end of the first laser emitter, and a light outlet end of the scanning galvanometer module always faces the surface of the detected workpiece; the scanning galvanometer module is used for adjusting the position of the surface of the detected workpiece, which is transmitted by the laser output by the first laser transmitter.
In some embodiments, the scanning galvanometer module further comprises two collimating focal length coupling lens groups, wherein one collimating focal length coupling lens group is arranged at the light outlet end of the scanning galvanometer module, and the other collimating focal length coupling lens group is arranged between the laser emission end of the second laser emitter and the light path of the surface of the detected workpiece; the collimating focal length coupling lens group is used for collimating and focusing laser.
In some embodiments, the device further comprises a pan-tilt camera electrically connected with the control module, wherein the pan-tilt camera is used for shooting pictures of the surface of the detected workpiece and transmitting the picture information to the control module for processing.
In some embodiments, the first laser emitter emits a pulsed laser beam with power of 50-500W, pulse width of 10-200 ns, repetition frequency of 1-10 kHz, spot diameter of 30 μm-1 mm, and wavelength of 1060-1080 nm when performing laser cleaning operation;
when the first laser transmitter executes laser polishing operation, a laser pulse light beam with the transmitted power of 50-500W, the transmitted pulse width of 100-300 ns, the repetition frequency of 100-500 kHz, the spot diameter of 30 mu m-80 mm and the wavelength of 1060-1080 nm is emitted;
the second laser emitter emits laser pulse beams with single pulse energy of 0.5-300 mJ, pulse width of 1-5 ns, repetition frequency of 10 Hz-10 kHz, power stability RMS of less than 0.2% and wavelength of 532nm, 1064nm or 1550 nm.
Compared with the prior art, the utility model discloses an advantage includes at least: the utility model provides a collect washing, polishing and ultrasonic testing in laser combined system of an organic whole, adopt laser cleaning and laser polishing to get rid of workpiece surface's iron rust to improve workpiece surface's smoothness, thereby reduce the requirement to optical interferometer among the laser ultrasonic testing process, improve the detection precision and the degree of accuracy of coarse work piece, enlarge the scope that laser ultrasonic tested, avoid using dual wavelength interferometer in-process need introduce high voltage risk, safe and reliable.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention, which is made with reference to the accompanying drawings, and can help to provide a thorough understanding of the present invention.
Fig. 1 is a schematic view of a laser composite system integrating cleaning, polishing and ultrasonic detection provided by the present invention;
description of reference numerals:
1. a first laser transmitter; 2. a second laser transmitter; 3. a laser ultrasonic receiver; 4. a scanning galvanometer module; 5. a collimating focal length coupling lens group; 6. a pan-tilt camera; 10. and a control module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs.
Referring to fig. 1, the utility model provides a laser composite system integrating cleaning, polishing and ultrasonic detection, which comprises a control module 10, a first laser transmitter 1, a second laser transmitter 2 and a laser ultrasonic receiver 3 electrically connected with the control module 10, wherein the bottom dotted line in the figure represents the detected workpiece; the first laser transmitter 1 is used for transmitting laser pulses to the surface of a detected workpiece under the control of the control module 10 so as to perform laser cleaning and laser polishing on the surface of the detected workpiece; the second laser transmitter 2 is used for transmitting laser pulses to the detected workpiece and exciting laser ultrasonic signals on the surface of the detected workpiece under the control of the control module 10; the laser ultrasonic receiver 3 is used for receiving laser ultrasonic signals excited by the surface of the detected workpiece, converting the received laser ultrasonic signals into electric signals and transmitting the electric signals to the control module 10 for processing, so that the surface defects of the detected workpiece can be detected.
Preferably, the system further comprises a pan-tilt camera 6 electrically connected with the control module 10, wherein the pan-tilt camera 6 is used for taking pictures of the surface of the detected workpiece and transmitting the picture information to the control module 10 for processing.
Preferably, the laser ultrasonic receiver 3 includes an optical interferometer and a photodetector, the optical interferometer is configured to modulate a laser ultrasonic signal containing information of a surface defect of the detected workpiece into an optical signal, and the photodetector is configured to convert the modulated optical signal into an electrical signal and transmit the electrical signal to the control module 10. The optical interferometer modulates the laser ultrasonic signal containing the information of the surface defect of the detected workpiece into an optical signal by using an optical interference principle, and converts the optical signal into an electrical signal through a photoelectric detector so as to transmit the electrical signal to the control module 10. Specifically, the optical interferometer in the laser ultrasonic receiver 3 is a dual-wavelength optical interferometer, an F-P cavity interferometer, or a heterodyne interferometer.
Preferably, the system further comprises a scanning galvanometer module 4, wherein a light inlet end of the scanning galvanometer module 4 faces a laser emitting end of the first laser emitter 1, and a light outlet end of the scanning galvanometer module 4 always faces the surface of the detected workpiece; the scanning galvanometer module 4 is used for adjusting the position of the laser transmitted to the surface of the detected workpiece.
Preferably, the system further comprises two collimating focal length coupling lens groups 5, wherein one collimating focal length coupling lens group 5 is arranged at the light outlet end of the scanning galvanometer module 4, and the other collimating focal length coupling lens group is arranged between the laser emitting end of the second laser emitter 2 and the light path of the surface of the detected workpiece; the collimating focal length coupling lens group 5 is used for collimating and focusing laser.
The control module 10 may include a computer, an FGPA module, an amplifying circuit, a high-speed AD sampling circuit, and various driving circuits, the computer being electrically connected to the FGPA module; the electric signal output by the photoelectric detector is amplified by the amplifying circuit and is subjected to AD conversion by the high-speed AD sampling circuit, and then is transmitted to the FPGA module for processing; the FPGA module controls the work of the first laser transmitter 1, the second laser transmitter 2 and the holder camera 6 through different driving circuits respectively.
In one embodiment, the first laser emitter 1 emits a laser pulse light beam with power of 50-500W, pulse width of 10 ns-200 ns, repetition frequency of 1-10 kHz, spot diameter of 30 μm-1 mm and wavelength of 1060-1080 nm when performing laser cleaning operation;
when the first laser emitter 1 executes laser polishing operation, a laser pulse light beam with the emitted power of 50-500W, the pulse width of 100 ns-300 ns, the repetition frequency of 100-500 kHz, the spot diameter of 30 mu m-80 mm and the wavelength of 1060-1080 nm is emitted;
the second laser emitter 2 emits laser pulse beams with single pulse energy of 0.5-300 mJ, pulse width of 1-5 ns, repetition frequency of 10 Hz-10 kHz, power stability RMS of less than 0.2% and wavelength of 532nm, 1064nm or 1550 nm.
When the laser composite system integrating cleaning, polishing and ultrasonic detection is used for detecting the surface defects of the workpiece, the method comprises the following steps:
s1, acquiring image information of the surface of the detected workpiece through the pan-tilt camera 6, transmitting the image information to the control module 10, setting laser cleaning parameters and working time by the control module 10 according to the received image information, starting a laser cleaning program, controlling the first laser emitter 1 to emit laser pulses to the surface of the detected workpiece, and performing laser cleaning processing on the detected workpiece until the preset laser cleaning working time is reached;
s2, acquiring the image information of the surface of the detected workpiece after being cleaned by the laser in the step S1 through the pan-tilt camera 6, transmitting the image information to the control module 10, then judging whether an oxide layer or/and rust exists on the surface of the detected workpiece by the control module 10 according to the received image information, if so, repeating the step S1 until no oxide layer or/and rust exists on the surface of the detected workpiece, and then executing the step S3; if not, directly executing step S3;
s3, acquiring image information of the surface of the detected workpiece through the pan-tilt camera 6 again, transmitting the image information to the control module 10, setting laser polishing parameters and working time by the control module 10 according to the received image information, starting a laser polishing program, controlling the first laser emitter 1 to emit laser pulses to the surface of the detected workpiece, and performing laser polishing treatment on the detected workpiece until the preset laser polishing working time is reached;
s4, acquiring the image information of the detected workpiece surface after laser in the step S3 through the pan-tilt camera 6, transmitting the image information to the control module 10, then judging whether the roughness of the detected workpiece surface is less than 5 μm or not through the control module 10 according to the received image information, if not, repeating the step S3 until the roughness of the detected workpiece surface is less than 5 μm, and then executing the step S5; if yes, go directly to step S5;
and S5, the control module 10 starts a laser ultrasonic detection program to control the second laser emitter 2 and the laser ultrasonic receiver 3 to work, firstly, the second laser emitter 2 emits laser pulses to the surface of the workpiece to be detected after laser polishing in the step S3, the laser pulses excite laser ultrasonic signals on the surface of the workpiece to be detected, then, the laser ultrasonic signals excited on the surface of the workpiece to be detected are received by the laser ultrasonic receiver 3, the signals are converted into electric signals, and then the electric signals are transmitted to the control module 10 to be processed, so that the detection of the surface defects of the workpiece to be detected can be completed.
It is understood that, when determining whether the surface of the workpiece has an oxide layer or/and rust, and determining the roughness of the surface of the workpiece, the control module 10 may compare the image information with a plurality of images of the surface of the workpiece pre-stored in the computer database, and determine the roughness according to the comparison result.
In summary, the utility model provides a laser composite system integrating cleaning, polishing and ultrasonic detection, which combines laser cleaning, laser polishing and laser ultrasonic detection; the method has the advantages that the rust on the surface of the workpiece is removed by adopting laser cleaning and laser polishing, and the smoothness of the surface of the workpiece is improved, so that the requirement on an optical interferometer in the laser ultrasonic detection process is reduced, the detection precision and accuracy of the rough workpiece are improved, the laser ultrasonic detection range is enlarged, the risk of introducing high voltage in the process of using the dual-wavelength interferometer is avoided, and the method is safe and reliable.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. A laser composite system integrating cleaning, polishing and ultrasonic detection is characterized by comprising a control module (10), and a first laser transmitter (1), a second laser transmitter (2) and a laser ultrasonic receiver (3) which are electrically connected with the control module (10);
the first laser transmitter (1) is used for transmitting laser pulses to the surface of a detected workpiece under the control of the control module (10) so as to carry out laser cleaning and laser polishing on the surface of the detected workpiece;
the second laser transmitter (2) is used for transmitting laser pulses to the detected workpiece under the control of the control module (10) and exciting a laser ultrasonic signal on the surface of the detected workpiece;
the laser ultrasonic receiver (3) is used for receiving laser ultrasonic signals excited by the surface of the detected workpiece, converting the received laser ultrasonic signals into electric signals and transmitting the electric signals to the control module (10) for processing, so that the surface defects of the detected workpiece can be detected.
2. The laser composite system integrating cleaning, polishing and ultrasonic testing as claimed in claim 1, further comprising a pan-tilt camera (6) electrically connected to the control module (10), wherein the pan-tilt camera (6) is used for taking pictures of the surface of the workpiece to be tested and transmitting the picture information to the control module (10) for processing.
3. The laser composite system integrating cleaning, polishing and ultrasonic detection as claimed in claim 2, wherein the laser ultrasonic receiver (3) comprises an optical interferometer and a photodetector, the optical interferometer is connected with the photodetector, and the photodetector is connected with the control module (10);
the optical interferometer is used for modulating a laser ultrasonic signal containing the detected workpiece surface defect information into an optical signal and then transmitting the optical signal to the photoelectric detector; the photoelectric detection is used for converting the modulated optical signal into an electric signal and then transmitting the electric signal to the control module (10).
4. The laser composite system integrating cleaning, polishing and ultrasonic detection as claimed in claim 3, wherein the optical interferometer in the laser ultrasonic receiver (3) is a dual-wavelength optical interferometer, an F-P cavity interferometer or a heterodyne interferometer.
5. The laser composite system integrating cleaning, polishing and ultrasonic testing as claimed in claim 4, further comprising a scanning galvanometer module (4), wherein a light input end of the scanning galvanometer module (4) faces a laser emitting end of the first laser emitter (1), and a light output end of the scanning galvanometer module (4) always faces a surface of a workpiece to be tested; the scanning galvanometer module (4) is used for adjusting the position of the surface of the detected workpiece, which is transmitted by the laser output by the first laser transmitter (1).
6. The laser composite system integrating cleaning, polishing and ultrasonic testing as claimed in claim 5, further comprising two collimating focal length coupling lens groups (5), wherein one collimating focal length coupling lens group (5) is disposed at the light exit end of the scanning galvanometer module (4), and the other collimating focal length coupling lens group (5) is disposed between the laser emitting end of the second laser emitter (2) and the optical path of the surface of the workpiece to be tested.
7. The laser composite system integrating cleaning, polishing and ultrasonic detection as claimed in claim 6, wherein the first laser emitter (1) emits laser pulse light beam with power of 50-500W, pulse width of 10 ns-200 ns, repetition frequency of 1-10 kHz, spot diameter of 30 μm-1 mm and wavelength of 1060-1080 nm when performing laser cleaning operation;
when the first laser emitter (1) executes laser polishing operation, emitted power is 50-500W, pulse width is 100 ns-300 ns, repetition frequency is 100-500 kHz, spot diameter is 30 mu m-80 mm, and wavelength is 1060-1080 nm;
the second laser emitter (2) emits laser pulse beams with single pulse energy of 0.5-300 mJ, pulse width of 1-5 ns, repetition frequency of 10 Hz-10 kHz, power stability RMS of less than 0.2% and wavelength of 532nm or 1064nm or 1550 nm.
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| CN202021485657.9U CN212340975U (en) | 2020-07-24 | 2020-07-24 | Laser composite system integrating cleaning, polishing and ultrasonic detection |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812037A (en) * | 2020-07-24 | 2020-10-23 | 宝宇(武汉)激光技术有限公司 | Laser composite system and method integrating cleaning, polishing and ultrasonic detection |
| CN114383775A (en) * | 2021-12-10 | 2022-04-22 | 盐城市金洲机械制造有限公司 | High-precision gear detection machining method based on machine vision |
-
2020
- 2020-07-24 CN CN202021485657.9U patent/CN212340975U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812037A (en) * | 2020-07-24 | 2020-10-23 | 宝宇(武汉)激光技术有限公司 | Laser composite system and method integrating cleaning, polishing and ultrasonic detection |
| CN114383775A (en) * | 2021-12-10 | 2022-04-22 | 盐城市金洲机械制造有限公司 | High-precision gear detection machining method based on machine vision |
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Denomination of utility model: Laser composite system integrating cleaning, polishing and ultrasonic testing Effective date of registration: 20220310 Granted publication date: 20210112 Pledgee: Wuhan area branch of Hubei pilot free trade zone of Bank of China Ltd. Pledgor: Baoyu (Wuhan) laser technology Co.,Ltd. Registration number: Y2022420000056 |