CN205518834U - Laser washing device - Google Patents
Laser washing device Download PDFInfo
- Publication number
- CN205518834U CN205518834U CN201620102187.0U CN201620102187U CN205518834U CN 205518834 U CN205518834 U CN 205518834U CN 201620102187 U CN201620102187 U CN 201620102187U CN 205518834 U CN205518834 U CN 205518834U
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- laser
- cleaning equipment
- scanning galvanometer
- laser beam
- cleaning
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- 238000005406 washing Methods 0.000 title abstract description 3
- 238000004140 cleaning Methods 0.000 claims abstract description 71
- 238000007493 shaping process Methods 0.000 claims abstract description 28
- 230000000007 visual effect Effects 0.000 claims description 14
- 238000005388 cross polarization Methods 0.000 claims description 6
- 230000010287 polarization Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- 206010010071 Coma Diseases 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009394 selective breeding Methods 0.000 description 1
Landscapes
- Laser Beam Processing (AREA)
- Cleaning In General (AREA)
Abstract
The utility model relates to a laser washing device, including laser emergence system, beam shaping system, control system, the system laser beam takes place for laser, beam shaping system sets up in the laser beam light path, still includes detecting system, 3D scanning galvanometer and focus system. The laser beam, by laser emergence system sends, loops through beam shaping system, 3D scanning galvanometer, the focus system is until treating cleaning workpiece, control system is through control the system takes place for laser, detecting system and 3D scanning galvanometer, and real time kinematic adjustment laser beam focus position accomplishes the cleaning. The utility model discloses a 3D scanning galvanometer, can realize that the high accuracy of curved surface object or plane object is washd, the precision reaches the micron dimension, adopt the XY work platform system, can realize also that big breadth rinses the operation. Furthermore, the utility model also discloses a portable cleaning equipment of based on the 3D scanning galvanometer.
Description
Technical field
This utility model belongs to the technical field of laser application, is specifically related to a kind of laser cleaning equipment, the laser cleaning equipment of a kind of curved surface or large format.
Background technology
Conventional clean industrial equipment has various cleaning way, is mostly to utilize chemical agent and mechanical means to be carried out.Today that increasingly stricter, people's environmental protection and safety consciousness strengthen day by day at China environmental protection laws and regulations requirement, the chemical species that commercial production can use in cleaning will become fewer and feweri.How to find and more clean, and not have abrasive cleaning way be the problem that we have to take into account that.And laser cleaning has without grinding, noncontact, low thermal effect and the cleaning characteristics such as object being applicable to various material it is considered to be solution the most reliable, maximally effective.When surface is especially stained with in cleaning process the pollution granule of submicron order, these granules are often the tightlyest viscous, and it can not be removed by conventional cleaning way, is carried out the most highly effective with this laser emission surface of the work.Owing to laser is contactless cleaning to workpiece, precision workpiece or its delicate area are cleaned fool proof, and clean precision height and be widely accepted.
Existing laser cleaning machine uses about 1 μm optical maser wavelength, such as the SLCR company of Germany just to use 1 mum wavelength mostly.Owing to metal is at a relatively high to 1 mum wavelength laser absorption rate, so the material such as dust, greasy dirt is cleaned out, metal surface also can be injured.Cleaning the world 2006,22(4): 27-32 laser cleaning equipment introduction is just mentioned employing 10.6 mum wavelength and cleans, but this technical scheme uses the mode loading object on platform, owing to platform load is big, the shortcomings such as cleaning efficiency is low, precision is the highest can be caused when cleaning high accuracy small items.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model proposes a kind of environment-protecting clean, in high precision, low thermal effect and do not have abrasive cleaning device.
The technical scheme of this utility model laser cleaning equipment is:
A kind of laser cleaning equipment, including laser generating system, beam shaping system, control system, described laser generating system generation laser beam, described beam shaping system is arranged in laser beam light path, also includes detecting system, 3D scanning galvanometer and focusing system.Described laser beam, is sent by described laser generating system, passes sequentially through described beam shaping system, 3D scanning galvanometer and focusing system until workpiece to be cleaned；Described control system is by controlling described laser generating system, and detecting system and 3D scanning galvanometer, Real-time and Dynamic adjusts laser beam foucing position and completes cleaning.
Further, also including XY work platforms, described control system controls the work of described XY work platforms, and described laser generating system, beam shaping system, 3D scanning galvanometer are installed on described XY work platforms.
Further, described beam shaping system also includes cross-polarization eyeglass that polarization by reflection unit, described polarization by reflection unit include being placed in parallel or the polarized lenses being placed in parallel and reflecting optics.
Further, the cross-polarization eyeglass being placed in parallel described in be 2 or described in the polarized lenses that is placed in parallel and reflecting optics everybody 1.
Further, described focusing system includes varifocal mirror group.
Further, described varifocal mirror group is zoom lens.
Further, described varifocal mirror group is moving lens group, and described moving lens group is connected with motor, and described motor is installed on support, and by described control system controls motion.
Further, described detecting system is laser ranging module, and described laser ranging module sends distance measuring light beam, and the laser beam that described distance measuring light beam sends with described laser generating system is coaxial.
Further, described laser ranging module includes light combination mirror, and the plating of described light combination mirror eyeglass two sides, to described laser beam anti-reflection film, plates the reflectance coating of described distance measuring light beam in light combination mirror lens reflecting one side.
Further, described detecting system is the visual module of CCD, and the laser beam that the visual module of described CCD and described laser generating system send is coaxially disposed or paraxonic is arranged.
Second technical scheme of this utility model is:
A kind of big width laser cleaning method, including following step:
1, workpiece drawing to be cleaned is imported described control system；
2, described control system is divided into multiple cleaning part automatically according to workpiece drawing to be cleaned and described XY work platforms working range；
3, control system controls described XY work platforms, described laser generating system, and detecting system and 3D scanning galvanometer, subregion is carried out, until cleaning completes.
The 3rd technical scheme of this utility model is:
A kind of portable laser cleaning equipment, including laser generating system, beam shaping system, control system, detecting system, 3D scanning galvanometer and focusing system；Described laser generating system generation laser beam, described beam shaping system is arranged in laser beam light path, and described focusing system is zoom lens and is arranged at described 3D scanning galvanometer end；Described laser beam, is sent by described laser generating system, passes sequentially through described beam shaping system, 3D scanning galvanometer and zoom lens until workpiece to be cleaned；Described control system is by controlling described laser generating system, detecting system and 3D scanning galvanometer, and Real-time and Dynamic adjusts laser beam foucing position and completes cleaning.
Technical solutions of the utility model have the advantage that
This utility model have employed 3D scanning galvanometer system, can clean with the high accuracy of curved face object or planar object, and precision reaches micron dimension；Use XY Work platform system, it is also possible to realize large format washing and cleaning operation.
Accompanying drawing explanation
Fig. 1 is the design diagram of this utility model laser cleaning equipment；
Fig. 2 a is the structural representation of this utility model laser cleaning equipment；
Fig. 2 b is Fig. 2 a laser cleaning device A direction structure view；
Fig. 3 is the optical component structure schematic diagram of this utility model laser cleaning equipment；
Fig. 4 is that the visual module of CCD of this utility model laser cleaning equipment is coaxially disposed structural representation with laser beam；
Fig. 5 is that the visual module of CCD of this utility model laser cleaning equipment arranges structural representation with laser beam paraxonic；
Fig. 6 is the Special-shaped object schematic shapes to be cleaned as example；
Wherein:
1, laser generating system；2, beam shaping system；3, detecting system；4, control system；5,3D scanning galvanometer；6, focusing system；7, workpiece；8, XY work platforms；9, polarization by reflection unit；10, mechanical support frame；11, the visual module of CCD；12, fixed mount；13, coaxial optical system；14, the visual module fixing rack of CCD；15,45 ° of reflecting mirrors.
Detailed description of the invention
The principle of laser cleaning machine, utilizes the superlaser focusing on pollutant surface pollutant ablation to be gasified, and does not hurt workpiece body.As higher to laser absorption rate in glue, dust, oils and fats and other nonmetallic materials, and workpiece body is less to laser absorption, but or workpiece body to absorb laser body relatively big relative to pollutant, heat radiation is very fast, do not injure workpiece body, and pollutant are gasified.The utility model proposes the device utilizing high-energy laser (both can about 1 μm, it is also possible to be 10.6 μm, more can be with the laser instrument of other wavelength) to be carried out.It addition, different wave length laser instrument can be changed according to pollutant and the different of workpiece material.Metal, some plastics such as PT, PC, PE etc. and paper object can be with 10.6 mum wavelength laser instrument, and some object can be by 1 mum wavelength laser cleaning, and also some particular matter can use other long wavelength lasers.
Below in conjunction with the accompanying drawings, by embodiment, technical solutions of the utility model are described further.
As shown in Figure 1, Figure 2 shown in a and Fig. 2 b, a kind of laser cleaning equipment, including laser generating system 1, beam shaping system 2, detecting system 3, control system 4,3D scanning galvanometer 5 and focusing system 6.
When cleaning workpiece area is more than 300mm × 300mm, can increase XY work platforms 8, described in this embodiment, XY work platforms 8 uses planer-type workbench.Described 3D scanning galvanometer 5 is arranged at and works on described planer-type workbench, increases cleaning area.
As it is shown on figure 3, described laser generating system 1 occurs laser beam, described laser beam to pass sequentially through described beam shaping system 2, detecting system 3,3D scanning galvanometer 5 and focusing system 6 until workpiece to be cleaned 7.Described control system 4 is by controlling described laser generating system 1, and detecting system 3 and 3D scanning galvanometer 5, real-time adjustment laser beam foucing position also completes cleaning.
Described beam shaping system 2 carries out shaping to laser beam.Described beam shaping system 2 also includes 2 polarized lenses that cross-polarization unit 9, cross-polarization unit 9 include being placed in parallel, and optics is caused damage by the laser preventing workpiece from reflecting.
As a kind of embodiment, described detecting system 3 can select laser ranging module, is used for detecting whether present laser bundle focus is accurately located at irradiated surface of the work, and error is less than the depth of focus size of optical focusing system.Described laser ranging module sends distance measuring light beam, and the laser beam that distance measuring light beam sends with described laser generating system 1 is coaxial, can directly measure surface of the work and the distance of described focusing system 6 that present laser bundle irradiates, thus judge whether to be in focal position；It is made to be accurately located at surface of the work if it is not, then adjust laser beam foucing position.Described laser ranging module also includes light combination mirror, and the plating of described light combination mirror eyeglass two sides, to described laser beam anti-reflection film, plates the reflectance coating of described distance measuring light beam in light combination mirror lens reflecting one side.
As another embodiment, described detecting system 3 can also select the visual module of CCD 11, the visual module of described CCD 11 to be used for monitoring, observing cleaning performance.As shown in Figure 4, the laser beam that the visual module of described CCD 11 sends with described laser generating system 1 is coaxially disposed, and described fixed mount 12 fixes described beam shaping system 2 and described coaxial optical system 13.As it is shown in figure 5, the laser beam that the visual module of described CCD 11 and described laser generating system 1 send also can be arranged by paraxonic, the visual module fixing rack of described CCD 14 is used for fixing the visual module of CCD 11, and described 45 ° of reflecting mirrors 15 are used for launching paraxonic light path.
Described 3D scanning galvanometer 5 is controlled by control system 4, makes laser according to the requirement campaign of regulation by reflection.For cleaning general regular planar, 2D galvanometer i.e. can reach scanning cleaning function.But when abnormity object occur, or irregular surface, as shown in Figure 6, laser arrives 3D scanning galvanometer 5 by beam shaping system 2, under control system 4 controls, makes laser according to the orbiting motion of regulation, thus the high accuracy scanning carrying out abnormity object is cleaned.Precision reaches micron dimension, and the high accuracy simultaneously nor affecting on planar object is cleaned.
Described focusing system 6 can make laser focusing become the least hot spot to be radiated at surface of the work, color difference eliminating, it also is able to eliminate the aberration such as spherical aberration, coma simultaneously, ensure that when laser beam foucing falls at surface of the work, surface of the work imaging is the most high-visible, it is thus possible to realize precision cleaning.
Described focusing system 6 also includes that varifocal mirror group, described varifocal mirror group are zoom lens or moving lens group.Described moving lens group is connected with motor, and described motor is installed on support, and by described control system controls motion.
Described focusing system 6 also includes movable lens.Described movable lens can be according to cleaning breadth artificial selection's amasthenic lens.Because camera lens is the least, in the case of equal cleaning, required laser power is the least, and cost is the lowest.In the case of allowing, change camera lens, make cleaning cost lower.
Described focusing system 6 can also arrange defocusing amount.The laser focused on workpiece object surface, if any damaging described workpiece 7 surface, can adjust described focusing system 6, makes laser deviate certain distance on described workpiece 7 surface, both can complete cleaning, again will not disfiguring workpiece.
When described workpiece 7 is bigger, it is possible to use described planer-type workbench is cleaned by connecting method.First workpiece 7 drawing to be cleaned is imported control system 4；Secondly, control system 4 is divided into multiple cleaning part automatically according to workpiece 7 drawing to be cleaned and planer-type workbench working range；Finally, control system 4 controlling planer-type workbench, laser generating system 1, detecting system 3 and 3D scanning galvanometer 5, subregion is carried out, until cleaning completes.
This utility model additionally provides portable laser cleaning equipment, and described portable laser cleaning equipment includes laser generating system 1, beam shaping system 2, control system 4,3D scanning galvanometer 5 and focusing system 6.Being occurred laser beam, beam shaping system 2 to be arranged in laser beam light path by laser generating system 1, focusing system 6 is for zoom lens and is arranged at described 3D scanning and shakes 5 ends.Described laser beam passes sequentially through beam shaping system 2,3D scanning galvanometer 5 and zoom lens, until workpiece to be cleaned；Control system 4 controls described laser generating system 1 and 3D scanning galvanometer 5 Real-time and Dynamic adjustment laser beam foucing position and completes cleaning.
Zoom lens as focusing system are scanned, with described 3D, 5 integrators that shake by this portable laser cleaning equipment, make equipment more simplify convenient, and beneficially road, boats and ships etc. need the occasion of portable cleaning.
A kind of laser cleaning equipment or portable cleaning apparatus described in this utility model embodiment, specific works step is as follows:
Described laser generating system 1 launches laser beam, through described optical shaping system 2 and detecting system 3, and 3D scanning galvanometer 5 and described focusing system 6 described in directive.Described 3D scanning galvanometer, under the effect of described control system 4, cleans surface scan along workpiece 7.Now, laser beam is carried out on directive workpiece 7 surface after described focusing system 6 focuses on.Meanwhile, described detecting system 5 monitors whole cleaning process and cleaning performance.
It should be understood that; above-described embodiment is only for illustrating technology of the present utility model design and feature; its object is to for skilled in the art realises that content of the present utility model and implementing according to this, not detailed description of the invention is exhaustive, can not limit protection domain of the present utility model with this.All modifying according to the technical solution of the utility model or equivalent, without deviating from objective and the scope of technical solutions of the utility model, it all should be contained in the middle of right of the present utility model.
Claims (10)
1. a laser cleaning equipment, including laser generating system (1), beam shaping system (2) and control system (4), described laser generating system (1) launches laser beam, described beam shaping system (2) is arranged in laser beam light path, it is characterised in that: also include detecting system (3), 3D scanning galvanometer (5) and focusing system (6)；
Described laser beam, is sent by described laser generating system (1), passes sequentially through described beam shaping system (2), 3D scanning galvanometer (5), and focusing system (6) is until workpiece to be cleaned (7)；Described control system (4) is by controlling described laser generating system (1), and detecting system (3) and 3D scanning galvanometer (5), Real-time and Dynamic adjusts laser beam foucing position and completes cleaning.
Laser cleaning equipment the most according to claim 1, it is characterized in that, also include XY work platforms (8), described control system (4) controls the work of described XY work platforms (8), and described laser generating system (1), beam shaping system (2), 3D scanning galvanometer (5) are installed on described XY work platforms (8).
Laser cleaning equipment the most according to claim 1, it is characterized in that, described beam shaping system (2) also includes cross-polarization eyeglass that polarization by reflection unit (9), described polarization by reflection unit (9) include being placed in parallel or the polarized lenses being placed in parallel and reflecting optics.
Laser cleaning equipment the most according to claim 3, it is characterised in that described in the cross-polarization eyeglass that is placed in parallel be 2 or described in the polarized lenses that is placed in parallel and reflecting optics everybody 1.
Laser cleaning equipment the most according to claim 1, it is characterised in that described focusing system (6) includes varifocal mirror group.
Laser cleaning equipment the most according to claim 5, it is characterised in that described varifocal mirror group is zoom lens.
Laser cleaning equipment the most according to claim 5, it is characterised in that described varifocal mirror group is moving lens group, described moving lens group is connected with motor, and described motor is installed on support, and by described control system controls motion.
Laser cleaning equipment the most according to claim 1, it is characterised in that described detecting system is laser ranging module, described laser ranging module sends distance measuring light beam, and the laser beam that described distance measuring light beam sends with described laser generating system is coaxial.
Laser cleaning equipment the most according to claim 8, it is characterised in that described laser ranging module includes light combination mirror, the plating of described light combination mirror eyeglass two sides, to described laser beam anti-reflection film, plates the reflectance coating of described distance measuring light beam in light combination mirror lens reflecting one side.
Laser cleaning equipment the most according to claim 1, it is characterized in that, described detecting system is the visual module of CCD (11), and the laser beam that the visual module of described CCD (11) and described laser generating system (1) send is coaxially disposed or paraxonic is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620102187.0U CN205518834U (en) | 2016-02-01 | 2016-02-01 | Laser washing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620102187.0U CN205518834U (en) | 2016-02-01 | 2016-02-01 | Laser washing device |
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| CN205518834U true CN205518834U (en) | 2016-08-31 |
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| CN201620102187.0U Expired - Fee Related CN205518834U (en) | 2016-02-01 | 2016-02-01 | Laser washing device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583200A (en) * | 2016-02-01 | 2016-05-18 | 龚传波 | Laser cleaning equipment |
| CN107187426A (en) * | 2017-04-10 | 2017-09-22 | 上海铁路通信有限公司 | A kind of purging system and method suitable for high ferro motor-car |
| CN107297365A (en) * | 2017-08-09 | 2017-10-27 | 温州职业技术学院 | A kind of desk-top laser accurate cleaning device of dual wavelength composite energy profile |
| CN107321721A (en) * | 2017-08-28 | 2017-11-07 | 深圳光韵达光电科技股份有限公司 | A kind of SMT steel meshes cleaning device and cleaning method |
| CN107321717A (en) * | 2017-08-09 | 2017-11-07 | 温州职业技术学院 | A kind of hand-held adaptive laser cleaner of transformation into itself's dual-wavelength laser beam |
| CN110153108A (en) * | 2019-06-28 | 2019-08-23 | 清华大学 | A kind of focusing method and device of laser cleaning |
| CN110314883A (en) * | 2018-03-28 | 2019-10-11 | 杉野机械股份有限公司 | The image pickup method of the target position of scavenging machine and nozzle |
| CN113608328A (en) * | 2020-08-06 | 2021-11-05 | 广东电网有限责任公司珠海供电局 | Optical lens suitable for pulse laser medium-long distance cleaning |
| CN115318762A (en) * | 2022-09-14 | 2022-11-11 | 江苏大学 | Laser cleaning method and cleaning device for complex structure surface |
| CN116037572A (en) * | 2023-01-17 | 2023-05-02 | 深圳铭创智能装备有限公司 | Method, system, apparatus and storage medium for removing ink from surface of transparent substrate |
-
2016
- 2016-02-01 CN CN201620102187.0U patent/CN205518834U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105583200A (en) * | 2016-02-01 | 2016-05-18 | 龚传波 | Laser cleaning equipment |
| CN107187426A (en) * | 2017-04-10 | 2017-09-22 | 上海铁路通信有限公司 | A kind of purging system and method suitable for high ferro motor-car |
| CN107321717B (en) * | 2017-08-09 | 2019-06-18 | 温州职业技术学院 | A kind of adaptive laser cleaner of hand-held of transformation into itself's dual-wavelength laser beam |
| CN107297365A (en) * | 2017-08-09 | 2017-10-27 | 温州职业技术学院 | A kind of desk-top laser accurate cleaning device of dual wavelength composite energy profile |
| CN107321717A (en) * | 2017-08-09 | 2017-11-07 | 温州职业技术学院 | A kind of hand-held adaptive laser cleaner of transformation into itself's dual-wavelength laser beam |
| CN107297365B (en) * | 2017-08-09 | 2019-06-14 | 温州职业技术学院 | A kind of desk-top laser accurate cleaning device of dual wavelength composite energy profile |
| CN107321721A (en) * | 2017-08-28 | 2017-11-07 | 深圳光韵达光电科技股份有限公司 | A kind of SMT steel meshes cleaning device and cleaning method |
| CN110314883A (en) * | 2018-03-28 | 2019-10-11 | 杉野机械股份有限公司 | The image pickup method of the target position of scavenging machine and nozzle |
| CN110153108A (en) * | 2019-06-28 | 2019-08-23 | 清华大学 | A kind of focusing method and device of laser cleaning |
| CN113608328A (en) * | 2020-08-06 | 2021-11-05 | 广东电网有限责任公司珠海供电局 | Optical lens suitable for pulse laser medium-long distance cleaning |
| CN115318762A (en) * | 2022-09-14 | 2022-11-11 | 江苏大学 | Laser cleaning method and cleaning device for complex structure surface |
| CN116037572A (en) * | 2023-01-17 | 2023-05-02 | 深圳铭创智能装备有限公司 | Method, system, apparatus and storage medium for removing ink from surface of transparent substrate |
| CN116037572B (en) * | 2023-01-17 | 2024-04-09 | 深圳铭创智能装备有限公司 | Method, system, apparatus and storage medium for removing ink from surface of transparent substrate |
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Effective date of registration: 20170922 Address after: 210038 Jiangsu city of Nanjing Province Economic and Technological Development Zone No. 12 Chong Xing Ke Lu base room 205 Patentee after: NANJING DINAI LASER SCIENCE & TECHNOLOGY CO.,LTD. Address before: 210038 Jiangsu city of Nanjing province and the economic and Technological Development Zone Road No. 18 Patentee before: Gong Chuanbo |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 |
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| CF01 | Termination of patent right due to non-payment of annual fee |