CN106324101A - Laser shock strengthening on-line quality monitoring system and method based on sound pressure characteristic - Google Patents
Laser shock strengthening on-line quality monitoring system and method based on sound pressure characteristic Download PDFInfo
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- CN106324101A CN106324101A CN201610914806.0A CN201610914806A CN106324101A CN 106324101 A CN106324101 A CN 106324101A CN 201610914806 A CN201610914806 A CN 201610914806A CN 106324101 A CN106324101 A CN 106324101A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/14—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object using acoustic emission techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0234—Metals, e.g. steel
Abstract
The invention discloses a laser shock strengthening on-line quality monitoring system and a laser shock strengthening on-line quality monitoring method based on a sound pressure characteristic. The system comprises a laser controller, a control device, a sound wave receiving and sampling circuit, a laser device body and a sound pressure detection, transmission and sensing device, wherein the laser controller is used for controlling the laser device body to emit laser to a laser shock strengthening component to generate a sound emission signal on the surface of a material; the sound pressure detection, transmission and sensing device is used for receiving mechanical vibration generated by the sound emission signal to obtain sound wave sampling data; the sound wave receiving and sampling circuit is used for receiving the sound wave sampling data and transmitting the sound wave sampling data to the control device; the control device is used for obtaining a sound pressure level factor according to the sound wave sampling data, judging a laser shock strengthening effect according to the sound pressure level factor, and controlling the laser controller to send a Q regulation triggering signal according to the laser shock strengthening effect. The laser shock strengthening on-line quality monitoring system based on the sound pressure characteristic is high in adaptability to a machining process, stable, reliable and relatively low in cost.
Description
Technical field
The present invention relates to Non-Destructive Testing and field of laser processing, particularly relate to a kind of laser-impact based on acoustic pressure feature strong
Change online mass monitoring system and method.
Background technology
Reiforcing laser impact technology is most advanced metal surface enhanced means, and it is the plasma utilizing intense laser beam to produce
Shock wave, can produce compressive surfaces residual stress at the degree of depth surface of the work more than 1mm, improves the antibody Monoclonal intensity of workpiece and tired
Labor performance, compared with the metal material surface such as cold extrusion, shot-peening strengthening means, has noncontact, strong without heat affected area, controllability
And the strengthening effect outstanding advantages such as significantly.Such as to core part in nuclear reactor and the strengthening of welded unit, permissible
Reduce the sensitivity of stress corrosion cracking (SCC) to improve the fatigue strength of part；To the turbine fan blade of aircraft turbine engine
Laser impact intensified, its active time can be made to be doubled and redoubled, thus reduce flight cost and improve flight safety.This skill
Art is a dual-use technology, at Aero-Space, auto industry, petrochemical industry, nuclear industry, marine ship, health care industry etc.
Field has huge application prospect, irreplaceable in its effect of some occasion.
At present, the laser impact intensified equipment that domestic related research institutes has is all in the experimental applications stage, from laser
The application of shock peening through engineering approaches has suitable distance.Its one of the main reasons is: do not have real-time online quality monitoring method
And system.During laser impact intensified, affecting Effect of Laser Shock Processing many factors, the energy such as pulse laser is big
Little and the factor such as pulsewidth, light spot shape and size, protective layer material and thickness, restraint layer uniformity and thickness.On laboratory rank
Section, can detect laser impact intensified effect by a series of off-line, destructive detection method, but on through engineering approaches rank
Section, from processing environment, working (machining) efficiency and workpiece cost consideration, these methods are the most inadvisable.Reiforcing laser impact technology is pushed away
Extensively in commercial Application, it is necessary for realizing the on-line checking of the course of processing, detects laser impact intensified effect in real time, as control
The foundation of crudy processed.
In sum, it is achieved the online quality-monitoring of the laser impact intensified course of processing, controlling crudy is to realize its work
The key technology that journeyization application is indispensable.
Summary of the invention
It is an object of the invention to for overcome laser impact intensified during do not have real-time online mass monitoring system lack
Point, injures the controllability of laser impact intensified technique of anti-fatigue performance for improving key components and parts damage-retardation, it is provided that a kind of based on
The laser impact intensified online mass monitoring system of acoustic pressure feature and method, the present invention is to processing environment strong adaptability, stablizes
Reliably, lower-cost online quality control system and method.
The invention provides a kind of laser impact intensified online mass monitoring system based on acoustic pressure feature, including: laser
Controller (1), control device (3), acoustic receiver sample circuit (4), laser bodies (7) and acoustic pressure detection pick-up sensing device
(10)；
Described laser controller (1), is used for controlling laser bodies (7) and launches to laser impact intensified component locations (8)
Laser, makes material surface produce acoustic emission signal (9)；
Described acoustic pressure detection pick-up sensing device (10), is used for receiving the mechanical vibration that acoustic emission signal (9) produces, obtains
Wave sample data, and wave sample data is converted into analog voltage signal；
Described acoustic receiver sample circuit (4), is used for receiving wave sample data, and wave sample data is sent to control
Device processed (3)；
Described control device (3), for obtaining the sound pressure level factor according to wave sample data, according to the sound pressure level factor
Judge laser impact intensified effect；And according to laser impact intensified effect, control laser controller (1) and send tune Q triggering
Signal (6)；Wherein, it is judged that the mode of laser impact intensified effect: by the standard sound pressure level of the sound pressure level factor Yu setting
Factor range is compared, if in the range of detection signal is in standard sound pressure horizontal factor, representing Effect of Laser Shock Processing
Very well；If detection signal is beyond standard sound pressure horizontal factor scope, represents that Effect of Laser Shock Processing is bad, give a warning
And record.
Further, described acoustic pressure detection pick-up sensing device (10) includes the acoustic pressure detection sensor of data cube computation successively
(102), acoustic receiver element (103), signal conversion module (104) and signal transmitting module (105).
Further, the response frequency of described acoustic pressure detection pick-up sensing device (10) is 10-50KHz, and resonant frequency is
35-39KHz。
Further, described acoustic pressure detection pick-up sensing device (10) is 80-100cm with the distance of laser-impact point.
Further, described acoustic receiver sample circuit (4) uses high-speed data acquisition card.
Present invention also offers a kind of laser impact intensified online quality monitoring method based on acoustic pressure feature, including following
Step:
Step S100: laser controller (1) controls laser bodies (7) and launches to laser impact intensified component locations (8)
Laser, produces acoustic emission signal (9) at material surface；
Step S200: acoustic pressure detection pick-up sensing device (10) receives acoustic emission signal (9) and produces mechanical vibration, obtains sound
Ripple sampled data, and wave sample data is converted into analog voltage signal；
Step S300: acoustic receiver sample circuit (4) receives wave sample data, and wave sample data is sent to control
Device processed (3)；
Step S400: control device (3) and obtain the sound pressure level factor according to wave sample data, according to the sound pressure level factor
Judge laser impact intensified effect；Wherein, it is judged that the mode of laser impact intensified effect: by the sound pressure level factor and setting
Standard sound pressure horizontal factor scope compare, if detection in the range of signal is in standard sound pressure horizontal factor, represents and swashs
Light shock peening effect is fine；If detection signal is beyond standard sound pressure horizontal factor scope, represent Effect of Laser Shock Processing
Bad, give a warning and record；
Step S500: control device (3) and adjust Q to touch according to laser impact intensified effect, control laser controller (1) transmission
Signal (6).
Beneficial effect: the acoustic pressure waveform of the acoustic emission signal that the present invention produces with laser-impact is characterized as detecting object, by
The sound pressure level factor judges laser impact intensified processing effect, on-line checking shock peening effect that can be real-time, controls strong
Change quality, improve the automaticity of strengthening processing, little by ectocine, practical, it is judged that accurately, cost is relatively low.Therefore,
The present invention is a kind of to processing environment strong adaptability, online mass monitoring system reliable and stable, lower-cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention laser impact intensified online mass monitoring system based on acoustic pressure feature；
Fig. 2 is the structural representation of acoustic pressure detection pick-up sensing device；
Fig. 3 is the acoustic pressure oscillogram that the present invention monitors.
Accompanying drawing identifies: 1. laser controller；2. Trig control signal；3. control device；4. acoustic receiver sample circuit；5.
Coaxial cable；6. adjust Q to trigger signal；7. laser bodies；The most laser impact intensified component locations；9. acoustic emission signal；10. sound
Pressure detection pick-up sensing device；101. detection sensor installation seats；102. acoustic pressure detection sensors；103. acoustic receiver elements；
104. signal conversion module；105. signal transmitting module.
Detailed description of the invention
Technical scheme and the technique effect reached for making to present invention solves the technical problem that, using are clearer, below
The present invention is described in further detail in conjunction with the accompanying drawings and embodiments.It is embodied as it is understood that described herein
Example is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, for the ease of describing, accompanying drawing
In illustrate only part related to the present invention rather than full content.
Fig. 1 is the structural representation of the present invention laser impact intensified online mass monitoring system based on acoustic pressure feature.Ginseng
According to Fig. 1, based on acoustic pressure feature the laser impact intensified online mass monitoring system that the embodiment of the present invention provides, including: laser
Controller 1, control device 3, acoustic receiver sample circuit 4, laser bodies 7 and acoustic pressure detection pick-up sensing device 10.
Described laser controller 1, is used for controlling laser bodies 7 and launches laser to laser impact intensified component locations 8, make
Material surface produces acoustic emission signal 9；Wherein, laser controller 1 is able to receive that the triggering signal controlling device 3, controls laser
Device body 7；Laser bodies 7 is laser impact intensified actuator.
Described acoustic pressure detection pick-up sensing device 10, for receiving the machinery that the acoustic emission signal 9 propagated in air produces
Vibration, obtains wave sample data, and wave sample data is converted into analog voltage signal (acoustic-electric conversion)；And simulation electricity
Pressure signal is sent to acoustic receiver sample circuit 4 by coaxial cable 5.Fig. 2 is that the structure of acoustic pressure detection pick-up sensing device is shown
It is intended to.With reference to Fig. 2, in the present embodiment, acoustic pressure detection pick-up sensing device 10, the acoustic pressure including data cube computation successively detects biography
Sensor 102, acoustic receiver element 103, signal conversion module 104 and signal transmitting module 105, wherein, detection sensor is installed
Seat 101 and acoustic pressure detection sensor 102 are arranged on acoustic receiver element 103, signal conversion module 104 and signal transmitting module
105 are connected with acoustic pressure detection sensor 102 by data wire.In acoustic pressure detection pick-up sensing device 10, acoustic pressure detection sensor
102 for receiving the acoustic emission signal propagated in air, the sound wave letter that acoustic receiver element 103 enhancing signal sensor receives
Number, signal conversion module 104 for being converted into analog voltage signal by wave sample data, and signal transmitting module 105 is for handle
Analog voltage signal is sent to acoustic receiver sample circuit 4 by coaxial cable 5, and acoustic receiver sample circuit 4 is based on nerve net
The filtering algorithm of network removes noise jamming；Acoustic pressure detection pick-up sensing device 10 requires that response frequency is 10-50KHz, resonance frequency
Rate is 35-39KHz.Acoustic pressure detection pick-up sensing device 10 is arranged on the position of distance laser-impact point 80-100cm.
Described acoustic receiver sample circuit 4, for receiving and store the sound wave that acoustic pressure detection pick-up sensing device 10 transmits
Sampled data, filtering algorithm based on neutral net is removed noise jamming, and will be sent to control except the wave sample data after dry
Device 3 processed is analyzed.In the present embodiment, acoustic receiver sample circuit 4, selection high-speed data acquisition card, brand: TDEC,
Model: PCI-50612, is 4 Channel Synchronous parallel high-speed data capture cards, uses 12Bit high-precision A/D, and every passage is the highest to be adopted
Sample rate can reach 50MSps simultaneously；Its job step is as follows: high-speed data acquisition card Real-time Collection also stores by acoustic pressure detection change
Send the analog voltage signal that sensing device 10 transmits；Control device 3 and receive the data standard that acoustic receiver sample circuit 4 transmission comes
After getting order ready, the api interface that calling PCI-50612 card provides reads data in the software section controlling device 3, simultaneously clear
Data in the buffer of empty acoustic receiver sample circuit 4, prepare for data sampling next time.
Described control device 3, for receiving from the wave sample data of acoustic receiver sample circuit 4 and carrying out data and divide
Analysis, obtains the sound pressure level factor according to except the wave sample data after making an uproar through the piecewise function formula operation of control program, its
In, the sound pressure level factor is a constant value, and during laser impact intensified normal work, sound pressure level molecule is a regulation
In the range of, numerical value declines less than this range specification work quality, higher than this scope, numerical value then illustrates that asking occurs in duty
Topic.Therefore, laser impact intensified effect is judged according to the sound pressure level factor；And control to swash according to laser impact intensified effect
The power switch of optical generator, when the sound pressure level factor is beyond prescribed limit, controls laser controller 1 and sends tune Q triggering signal
6, i.e. control laser generator power switch and be adjusted；Concrete, wave sample data is through acoustic receiver sample circuit 4
Processing, eliminate the environmental factorss such as noise jamming, residue main signal again processes through control device 3 and is converted into sound pressure level
The factor, controls device 3 and the standard sound pressure horizontal factor scope of the sound pressure level factor of detection with setting is compared, if inspection
Surveying and then represent that Effect of Laser Shock Processing is fine in the range of signal is in standard sound pressure horizontal factor, system prompt crudy is just
Often；If detection signal is beyond standard sound pressure horizontal factor scope, representing that Effect of Laser Shock Processing is bad, system prompt adds
Work is off quality, and gives a warning and record.It addition, control device 3, it is additionally operable to control the whole of online mass monitoring system
Equipment, and utilize Trig control signal 2 to control laser controller 1 output signal.
In the present embodiment, device 3 is controlled, including computer part and software section, the major function of its software section
Including: read wave sample data and also calculate the sound pressure level factor, figure to control device internal memory, analysis wave sample data
Changing display acoustic pressure oscillogram, acoustic pressure oscillogram is as a example by Fig. 3, and in Fig. 3, the sound pressure level factor is under laboratory processing environment, adds
Work TiC4Material, laser power density is 4.5Gw/cm2Under conditions of draw.According to the reasonable threshold of the sound pressure level factor arranged
Value scope, analyzes laser impact intensified effect；The tune Q being triggered laser controller 1 by serial ports RS232 protocol integrated test system is triggered
Signal 6.
The principle of the present invention is, produces acoustic emission phenomenon during laser impact intensified, and the energy of laser directly determines
The sound emission signal characteristic that impact material surface sends.Therefore, the acoustic emission signal produced by detection laser-impact material
Feature judges the treatment effect of shock peening, and the present invention is exactly to utilize the sound pressure level factor prediction shock peening of acoustic emission signal
The residual stress of rear material surface.
Corresponding, the present embodiment also provides for a kind of laser impact intensified online quality monitoring method based on acoustic pressure feature,
Comprise the following steps:
Step S100: laser controller 1 controls laser bodies 7 and launches laser to laser impact intensified component locations 8,
Material surface produces acoustic emission signal 9；
Step S200: acoustic pressure detection pick-up sensing device 10 receives the mechanical vibration that acoustic emission signal 9 produces, and obtains sound wave
Sampled data, and wave sample data is converted into analog voltage signal；
Step S300: acoustic receiver sample circuit 4 receives wave sample data, and is sent to wave sample data control
Device 3；
Step S400: control device 3 and obtain the sound pressure level factor according to wave sample data, sentence according to the sound pressure level factor
Disconnected laser impact intensified effect；Wherein, it is judged that the mode of laser impact intensified effect: by the sound pressure level factor and setting
Standard sound pressure horizontal factor scope is compared, if in the range of detection signal is in standard sound pressure horizontal factor, representing laser
Shock peening effect is fine；If detection signal is beyond standard sound pressure horizontal factor scope, represent that Effect of Laser Shock Processing is not
Good, give a warning and record；
Step S500: control device 3 and send tune Q trigger letter according to laser impact intensified effect, control laser controller 1
Numbers 6.
Based on acoustic pressure feature the laser impact intensified online quality monitoring method of the present embodiment, when laser-impact material list
Producing acoustic emission phenomenon during face, the elastic wave that acoustic emission source sends detects pick-up sensing device 10 through Medium Propagation to acoustic pressure
Acoustic receiver element 103 surface.Acoustic receiver element 103 receives the elastic wave propagating and produces mechanical vibration, and signal turns
Acoustic pressure is detected the transient Displacements on sensor 102 surface and is converted into analog voltage signal, signal transmitting module 105 by die change block 104
The analog voltage signal of wave sample data is sent to acoustic receiver sample circuit 4 (PCI50612 high-speed data acquisition card).
Computer Control Unit 3 analyzes the sound pressure level factor of wave sample data, it is judged that laser impact intensified effect, controls laser
Controller 1 sends to laser bodies 7 adjusts Q to trigger signal 6.
The present invention laser impact intensified online quality monitoring method based on acoustic pressure feature can be by any embodiment of the present invention
Based on acoustic pressure feature the laser impact intensified online mass monitoring system provided realizes.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it is right
Technical scheme described in foregoing embodiments is modified, or the most some or all of technical characteristic is carried out equivalent replaces
Change, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a laser impact intensified online mass monitoring system based on acoustic pressure feature, it is characterised in that including: laser controlling
Device (1), control device (3), acoustic receiver sample circuit (4), laser bodies (7) and acoustic pressure detection pick-up sensing device
(10)；
Described laser controller (1), is used for controlling laser bodies (7) and launches laser to laser impact intensified component locations (8),
Material surface is made to produce acoustic emission signal (9)；
Described acoustic pressure detection pick-up sensing device (10), is used for receiving the mechanical vibration that acoustic emission signal (9) produces, obtains sound wave
Sampled data, and wave sample data is converted into analog voltage signal；
Described acoustic receiver sample circuit (4), is used for receiving wave sample data, and is sent to wave sample data control dress
Put (3)；
Described control device (3), for obtaining the sound pressure level factor according to wave sample data, judges according to the sound pressure level factor
Laser impact intensified effect；And according to laser impact intensified effect, control laser controller (1) and send tune Q triggering signal
(6)；Wherein, it is judged that the mode of laser impact intensified effect: by the standard sound pressure horizontal factor of the sound pressure level factor Yu setting
Scope is compared, if in the range of detection signal is in standard sound pressure horizontal factor, representing that Effect of Laser Shock Processing is very
Good；If detection signal is beyond standard sound pressure horizontal factor scope, represents that Effect of Laser Shock Processing is bad, give a warning also
Record.
Laser impact intensified online mass monitoring system based on acoustic pressure feature the most according to claim 1, its feature exists
In, described acoustic pressure detection pick-up sensing device (10) includes acoustic pressure detection sensor (102) of data cube computation successively, acoustic receiver
Element (103), signal conversion module (104) and signal transmitting module (105).
Laser impact intensified online mass monitoring system based on acoustic pressure feature the most according to claim 2, its feature exists
In, the response frequency of described acoustic pressure detection pick-up sensing device (10) is 10-50KHz, and resonant frequency is 35-39KHz.
4. according to based on acoustic pressure feature the laser impact intensified online mass monitoring system described in Claims 2 or 3, its feature
Being, described acoustic pressure detection pick-up sensing device (10) is 80-100cm with the distance of laser-impact point.
Laser impact intensified online mass monitoring system based on acoustic pressure feature the most according to claim 1, its feature exists
In, described acoustic receiver sample circuit (4) uses high-speed data acquisition card.
6. a laser impact intensified online quality monitoring method based on acoustic pressure feature, it is characterised in that comprise the following steps:
Step S100: laser controller (1) controls laser bodies (7) and launches laser to laser impact intensified component locations (8),
Acoustic emission signal (9) is produced at material surface；
Step S200: acoustic pressure detection pick-up sensing device (10) receives acoustic emission signal (9) and produces mechanical vibration, obtains sound wave and adopts
Sample data, and wave sample data is converted into analog voltage signal；
Step S300: acoustic receiver sample circuit (4) receives wave sample data, and is sent to wave sample data control dress
Put (3)；
Step S400: control device (3) and obtain the sound pressure level factor according to wave sample data, judge according to the sound pressure level factor
Laser impact intensified effect；Wherein, it is judged that the mode of laser impact intensified effect: by the mark of the sound pressure level factor Yu setting
Quasi-sound pressure level factor range is compared, if in the range of detection signal is in standard sound pressure horizontal factor, representing that laser rushes
Hit strengthening effect fine；If detection signal is beyond standard sound pressure horizontal factor scope, represent that Effect of Laser Shock Processing is not
Good, give a warning and record；
Step S500: control device (3) and adjust Q to trigger letter according to laser impact intensified effect, control laser controller (1) transmission
Number (6).
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Cited By (5)
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| CN107597737A (en) * | 2017-10-26 | 2018-01-19 | 张家港清研再制造产业研究院有限公司 | A kind of laser cleaning process method of real-time |
| CN108956782A (en) * | 2018-04-12 | 2018-12-07 | 江苏大学 | A kind of laser-impact online test method and device based on frequency of sound wave characteristic |
| CN110445004A (en) * | 2019-08-07 | 2019-11-12 | 天津凯普林光电科技有限公司 | A kind of optical fiber controller, optical fiber laser and cutting machine |
| CN110715981A (en) * | 2018-07-13 | 2020-01-21 | 中国科学院沈阳自动化研究所 | Laser shock peening on-line detection method and device based on acoustic emission signals |
| CN113091973A (en) * | 2021-03-04 | 2021-07-09 | 西安交通大学 | Laser shock peening real-time monitoring method based on internal elastic wave nonlinear characteristics |
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