CN102012373A - Laser derusting state monitoring method and device - Google Patents
Laser derusting state monitoring method and device Download PDFInfo
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- CN102012373A CN102012373A CN 201010290349 CN201010290349A CN102012373A CN 102012373 A CN102012373 A CN 102012373A CN 201010290349 CN201010290349 CN 201010290349 CN 201010290349 A CN201010290349 A CN 201010290349A CN 102012373 A CN102012373 A CN 102012373A
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- rust cleaning
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Abstract
The invention discloses a laser derusting state monitoring method and a laser derusting state monitoring device. The method is to detect the derusting state by detecting plasma excited in a laser derusting process, converting the energy of the plasma into a voltage signal and contrasting the output signals of a substrate surface and a rusted surface in a laser impact process. The method can be implemented simply and has high anti-interference capacity. The laser derusting state monitoring device comprises a focusing lens, a filter, a photoelectric conversion device and a controller, wherein the filter filters out reflected light and scattered light, which have the same wavelength as an impact laser beam; the photoelectric conversion device converts energy of the plasma into the voltage signal; and the controller carries out the comparative analysis of the voltage signal and determines the derusting state. The device is simple in structure, small in volume, low in cost and high in anti-interference capacity.
Description
Technical field
The present invention relates to a kind of sniffer and method, especially relate to a kind of device that utilizes the method for the definite rust cleaning state of detection laser impact and implement this method.
Background technology
Away rust by laser has the applicable base materials scope and extensively, does not damage series of advantages such as substrate surface, cleanliness height, operating cost are low, environmentally safe, and it is a kind of effective rust cleaning mode, has a good application prospect at aspects such as m of e.Whether should monitor the rust cleaning state in real time fully in order to detect rust cleaning, this concerns the practical engineering application of away rust by laser technology.
The real-time monitoring of away rust by laser can be adopted traditional spectral analysis technique, and as Laser-induced Breakdown Spectroscopy (LIBS), laser-induced fluorescence (LIF) (LIF) etc., but apparatus expensive, antijamming capability is relatively poor, signal Processing is loaded down with trivial details.The Chinese patent ultrasonic detection narrow pulse width laser spotter of publication number CN101143364A and method for separating polluted particles thereof disclose and have a kind ofly utilized narrow pulse width laser radiation to be cleaned the thing surface, produce strong shock wave vibratory in a short period of time, so dirt is from the device of dielectric surface removal.Its on-line monitoring system adopts supersonic detection device, gathers the ultrasonic signal that vibration forms, and analyzes after sending automaton to, goes out the cleaning state according to the ultrasonic signal analysis on change, in time controls cleaning process.Because ultrasonic signal be difficult for to be surveyed, need couplant to be filled with probe and be examined space between the surface guaranteeing sufficient acoustic coupling, and require to have the reviewer of certain experience to operate and judge testing result.
Summary of the invention
At above technical matters, the present invention proposes a kind of method that realizes the judgement away rust by laser state simple, that antijamming capability is strong, and realize this method simple in structure, volume is small and exquisite, the away rust by laser state detection device that Chen Bendi and antijamming capability are strong.
A kind of away rust by laser state detection method may further comprise the steps:
A) determine the rust cleaning threshold value;
B) scattered light or the reflected light of filtering and the identical wavelength of laser beam that focuses on the body surface of waiting to eliminate rust;
C) light after will filtering converts voltage signal to, and stores;
D) repeating step b) to step c), calculate this voltage signal and voltage signal difference last time, and with the rust cleaning threshold ratio;
E) signal difference is less than the rust cleaning threshold value, and rust cleaning finishes; Otherwise repeating step d).
A kind of away rust by laser state detection device, comprise condenser lens, wave filter, photoelectric conversion device and controller, the filter wavelength of wave filter is identical with rust cleaning laser instrument output light wavelength, light is behind described condenser lens and wave filter, enter photoelectric conversion device, this photoelectric conversion device is connected by transmission line with described controller.
Away rust by laser state detection device among the present invention mainly is made up of photodetector and oscillograph.
Controller among the present invention can be provided with rust cleaning threshold value, the described photoelectric conversion device output signal of storage, judge whether this signal reaches the rust cleaning threshold value.
The invention has the beneficial effects as follows:
A) detection method of away rust by laser state of the present invention is judged the state of rust cleaning by the mode of surveying energy of plasma, because characteristics such as the composition of matrix and corrosion thing, density are different, adopt this kind mode principle simple, antijamming capability is strong, Effect of Environmental such as noise-decreasing and temperature;
B) away rust by laser state detection device of the present invention comprises condenser lens, wave filter, photoelectric conversion device etc., because these devices are small and exquisite, price is lower, so the away rust by laser apparatus structure is simple, and volume is small and exquisite, and price is low.
Description of drawings
Fig. 1 away rust by laser state detection method flow diagram
Fig. 2 repeatedly surveys the voltage signal figure of energy of plasma
Fig. 3 away rust by laser state detection device synoptic diagram
Among the figure: 1 laser controller, 2 laser instruments, 3 plasmas, 4 condenser lenses, 5 corrosion layers, 6 matrixes, 7 wave filters, 8 photodetectors, 9 oscillographs, 10 controllers
Embodiment
As shown in Figure 1, be the process flow diagram of away rust by laser state detection method embodiment of the present invention, its method specifically comprises:
Step 101, definite rust cleaning threshold value
The away rust by laser threshold value can adopt the mode of test to determine.Choose the rust cleaning observation station, repeat the detection process of this method, and observe object, get this voltage signal and be the rust cleaning threshold value with the absolute value of the difference of voltage signal last time up to satisfying the rust cleaning standard-required.The mode that can adopt repeatedly measurement to be averaged is determined final rust cleaning threshold value.
The rust cleaning threshold value also can adopt the mode of empirical value to determine.Promptly determine threshold value with experiment method, and be recorded into database, choose corresponding value during detection as the rust cleaning threshold value at different metal material.
Step 102, laser-impact object
Laser parameters is set, starts laser, wait the in stable condition back of laser instrument laser beam impinge body surface.
The light of step 103, filtering and the identical wavelength of impact laser beam
To the reflected light that the laser-impact object produces, scattered light filters, filtering wherein with the light that impacts the identical wavelength of laser beam.
Step 104, signal conversion voltage
Convert the energy of plasma after filtering to voltage signal.
Step 105, recording voltage signal
Write down the voltage signal that above step produces, if this is for surveying first, the process of repeating step 102-step 105 then.
Step 106, compare with preceding secondary data
This voltage signal and voltage signal are last time done difference relatively.Here mainly be that amplitude to voltage compares.Result after the difference here is meant and takes absolute value.
Step 107, whether less than the rust cleaning threshold value
Whether the voltage difference of determining step 106 less than the rust cleaning threshold value, if less than this rust cleaning process of removing rust spot would be finished, repeat otherwise return step 102.
Fig. 2 is for repeatedly to survey the voltage signal figure that exports behind the plasma energy, and ordinate is a voltage amplitude among the figure, and horizontal ordinate is a detection times.As can be seen from Figure 2, the amplitude of the voltage signal that first three time detects descends successively, and voltage signal amplitude afterwards tends to be steady.From figure, can judge, preceding twice impact be the corrosion layer of body surface, and for the third time since corrosion layer be eliminated totally, impact be the object matrix, so the voltage signal amplitude tends to be steady.
Be illustrated in figure 3 as away rust by laser state detection device embodiment of the present invention.It comprises condenser lens 4, wave filter 7, photodetector 8, oscillograph 9 and controller 10, the filter wavelength of wave filter 7 is identical with the output light wavelength of rust cleaning laser instrument 2, behind plasma 3 and other light line focus lens 4 and the wave filter 7, enter photodetector 8 and oscillograph 9, oscillograph 9 and controller 10 are connected by transmission line.
The course of work of away rust by laser state detection device is by controller 10 the rust cleaning threshold value to be set; Laser controller 1 control laser instrument emission of lasering beam, through necessity turn back and focus on after act on the corrosion layer 5 of object 6, impact the reflection and the scattered light that produce plasma 3 and laser beam itself; After this light converges by condenser lens 4, after being filtered by the centre wavelength wave filter identical 7 with laser beam wavelength, residue plasma 3; Photodetector 8 and oscillograph 9 convert this plasma 3 to voltage signal; These voltage signals of controller 10 record, laser controller 1 impacts again if survey then first, and repeats above-mentioned detection process, otherwise with this voltage signal and voltage signal last time relatively, less than the rust cleaning threshold value, controller 10 shows that this eliminates rust successfully except that rust spot.
The controller 10 of rust cleaning state detection device of the present invention can link to each other with laser controller 1 by signal wire, controls the work of laser controller 1 according to the result who surveys.
The detection method of away rust by laser state of the present invention is judged the state of rust cleaning by the mode of surveying energy of plasma, because characteristics such as the composition of matrix and corrosion layer, density are different, adopt this kind mode principle simple, antijamming capability is strong, Effect of Environmental such as noise-decreasing and temperature.
The sniffer of away rust by laser state of the present invention, the sensitive detection parts that comprise are small and exquisite, cheap, so apparatus structure is simple, and volume is small and exquisite, the cost performance height, the voltage signal antijamming capability that converts to simultaneously is strong, transmission and more convenient.
Claims (5)
1. away rust by laser state detection method is characterized in that may further comprise the steps:
A) determine the rust cleaning threshold value;
B) light of filtering and the identical wavelength of impact laser beam that focuses on the body surface of waiting to eliminate rust;
C) light after will filtering converts voltage signal to, and stores;
D) repeating step b) to step c), calculate this voltage signal and voltage signal difference last time, and with the rust cleaning threshold ratio;
E) signal difference is less than the rust cleaning threshold value, and rust cleaning finishes; Otherwise repeating step d).
2. according to the described away rust by laser state detection of claim 1 method, it is characterized in that: the rust cleaning threshold value determines that method is in the step a), choose the rust cleaning observation station, repeating step b) to step c) up to satisfying the requirement of rust cleaning state, get the absolute value of the described signal difference of step d).
3. realize the device of the described away rust by laser state detection of claim 1 method, comprise condenser lens, wave filter, photoelectric conversion device and controller, it is characterized in that: the filter wavelength of described wave filter is identical with rust cleaning laser instrument output light wavelength, light is behind described condenser lens and wave filter, enter described photoelectric conversion device, this photoelectric conversion device is connected by transmission line with described controller.
4. according to the described away rust by laser state detection of claim 3 device, it is characterized in that: described photoelectric conversion device comprises photodetector and oscillograph.
5. according to the described away rust by laser state detection of claim 3 device, it is characterized in that: described controller can be provided with rust cleaning threshold value, the described photoelectric conversion device output signal of storage, judge whether this signal reaches the rust cleaning threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010290349 CN102012373A (en) | 2010-09-21 | 2010-09-21 | Laser derusting state monitoring method and device |
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| CN 201010290349 CN102012373A (en) | 2010-09-21 | 2010-09-21 | Laser derusting state monitoring method and device |
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| CN102012373A true CN102012373A (en) | 2011-04-13 |
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| CN 201010290349 Pending CN102012373A (en) | 2010-09-21 | 2010-09-21 | Laser derusting state monitoring method and device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700692A (en) * | 2012-06-19 | 2012-10-03 | 江苏大学 | Underwater real-time surface dirt cleaning and detecting device for optical-fiber laser |
| CN114608660A (en) * | 2022-03-28 | 2022-06-10 | 上海建冶科技股份有限公司 | Real-time monitoring system for laser rust removal process |
| CN114689564A (en) * | 2022-03-29 | 2022-07-01 | 上海建冶科技股份有限公司 | Laser derusting state detection method |
| CN115229641A (en) * | 2022-09-22 | 2022-10-25 | 南通速维工程设备有限公司 | Robot pressure pipeline rust removal control method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001232315A (en) * | 2000-02-28 | 2001-08-28 | Toshiba Corp | Laser cleaning device |
| JP2002043269A (en) * | 2000-07-31 | 2002-02-08 | Japan Steel Works Ltd:The | Laser cleaning completion judging apparatus and method |
| CN201223863Y (en) * | 2007-09-30 | 2009-04-22 | 南开大学 | Narrow pulsewidth laser automatic spotter |
-
2010
- 2010-09-21 CN CN 201010290349 patent/CN102012373A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001232315A (en) * | 2000-02-28 | 2001-08-28 | Toshiba Corp | Laser cleaning device |
| JP2002043269A (en) * | 2000-07-31 | 2002-02-08 | Japan Steel Works Ltd:The | Laser cleaning completion judging apparatus and method |
| CN201223863Y (en) * | 2007-09-30 | 2009-04-22 | 南开大学 | Narrow pulsewidth laser automatic spotter |
Non-Patent Citations (2)
| Title |
|---|
| 《Journal of Cultural Heritage》 20000801 Stefan Klein et al LIBS-spectroscopy for monitoring and control of the laser cleaning process of stone and medieval glass 第1卷, * |
| 《光子学报》 20020930 徐军 等 激光除锈过程的实时监测技术研究 全文 1-5 第31卷, 第9期 2 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102700692A (en) * | 2012-06-19 | 2012-10-03 | 江苏大学 | Underwater real-time surface dirt cleaning and detecting device for optical-fiber laser |
| CN102700692B (en) * | 2012-06-19 | 2015-06-10 | 江苏大学 | Underwater real-time surface dirt cleaning and detecting device for optical-fiber laser |
| CN114608660A (en) * | 2022-03-28 | 2022-06-10 | 上海建冶科技股份有限公司 | Real-time monitoring system for laser rust removal process |
| CN114689564A (en) * | 2022-03-29 | 2022-07-01 | 上海建冶科技股份有限公司 | Laser derusting state detection method |
| CN115229641A (en) * | 2022-09-22 | 2022-10-25 | 南通速维工程设备有限公司 | Robot pressure pipeline rust removal control method and system |
| CN115229641B (en) * | 2022-09-22 | 2023-12-29 | 南通速维工程设备有限公司 | Rust removal control method and system for pressure pipeline of robot |
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Application publication date: 20110413 |