CN213903783U - Laser direct writing structure with self-cleaning function and laser radar outer cover - Google Patents
Laser direct writing structure with self-cleaning function and laser radar outer cover Download PDFInfo
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- CN213903783U CN213903783U CN202021943974.0U CN202021943974U CN213903783U CN 213903783 U CN213903783 U CN 213903783U CN 202021943974 U CN202021943974 U CN 202021943974U CN 213903783 U CN213903783 U CN 213903783U
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Abstract
The application discloses structure and laser radar dustcoat are directly write to laser with self-cleaning function, and the cover body of this laser radar dustcoat is directly write the structure by laser and is made, and the structure is directly write to laser includes: the glass substrate, the micro-nano structure and the hydrophobic layer; the micro-nano structures are etched on the upper surface of the glass substrate in a laser direct writing mode, wherein the distance between every two adjacent micro-nano structures is 50-100 micrometers, and secondary composite structures are also laser etched on the upper surfaces of the micro-nano structures; the hydrophobic layer is coated on the surface of the micro-nano structure and a glass substrate exposed between two adjacent micro-nano structures so as to improve the static contact angle of the laser direct writing structure. Through the technical scheme in this application, effectively solve foreign matters such as dust and to the interference of laser radar work, further improve laser radar's environmental suitability and reduce laser radar system's maintenance cost.
Description
Technical Field
The application relates to the technical field of radars, in particular to a laser direct writing structure with a self-cleaning function and a laser radar outer cover.
Background
In laser radar's practical application, its actual operating condition is mostly outdoor or indoor industrial production occasion, and dust wherein can gather on laser radar dustcoat to influence laser radar's normal use. At present, the regular cleaning of the laser radar outer cover is time-consuming and labor-consuming, and the use cost is increased.
Therefore, there is a need for a lidar housing having a self-cleaning function, which mainly refers to: dust and pollutants of the laser radar cover naturally break away from the laser radar cover under the action of gravity, wind power, rainwater scouring and other natural external forces, so that the purpose of self-cleaning is achieved.
SUMMERY OF THE UTILITY MODEL
The purpose of this application lies in: the laser radar outer cover with the self-cleaning function and the corresponding laser direct writing structure can ensure that the laser radar can not be interfered by dust for a long time, improve the environmental adaptability of the laser radar and reduce the maintenance cost of a laser radar system.
The technical scheme of the first aspect of the application is as follows: there is provided a laser direct writing structure having a self-cleaning function, the laser direct writing structure including: the glass substrate, the micro-nano structure and the hydrophobic layer; the micro-nano structures are etched on the upper surface of the glass substrate in a laser direct writing mode, wherein the distance between every two adjacent micro-nano structures is 50-100 micrometers, and secondary composite structures are also laser etched on the upper surfaces of the micro-nano structures; the hydrophobic layer is coated on the surface of the micro-nano structure and a glass substrate exposed between two adjacent micro-nano structures so as to improve the static contact angle of the laser direct writing structure.
In any of the above technical solutions, further, the micro-nano structure is a polygonal body.
In any of the above technical solutions, further, the height of the micro-nano structure is 10-20 micrometers.
In any of the above technical solutions, further, the micro-nano structure is formed by exposing and etching a laser on a glass substrate by a laser beam with variable intensity.
In any of the above technical solutions, further, the micro-nano structures are distributed on the glass substrate in an array.
The technical scheme of the second aspect of the application is as follows: there is provided a lidar housing having a housing body formed from a direct laser writing construction according to any of the aspects of the first aspect.
In any one of the above technical solutions, further, the laser radar housing further includes: at least a set of heating electrode, heating electrode include positive pole and negative pole, and heating electrode sets up in the inboard of the cover body, and heating electrode is used for heating the dustcoat.
Through set up at least a set of heating electrode in the inboard of the cover body, can carry out the ohmic heating to this laser direct writing structure (the cover body) that has self-cleaning function, realize the cleaing away of ice, frost and rainwater, guarantee that laser radar can normally work under abominable weather condition.
In any one of the above technical solutions, further, the laser radar housing further includes: and the electrifying protection device is arranged on the heating electrode so as to protect the electrified heating electrode.
The beneficial effect of this application is:
the preparation of the surface micro-nano structure is realized by a laser direct writing method, the surface treatment liquid is utilized to further reduce the surface energy of the laser radar housing material, the effect that the static contact angle of the surface of the laser radar housing to water is larger than 170 degrees can be realized, and the rolling angle is smaller than 5 degrees. Through the technical scheme in this application, the realization of laser radar dustcoat material surface self-cleaning effect has been realized. Effectively solve foreign matter such as dust and the interference to laser radar work, further improve laser radar's environmental suitability and reduce laser radar system's maintenance cost.
The self-cleaning function is realized on the outer cover of the laser radar, so that the laser radar can be prevented from being interfered by dust for a long time and can normally work.
Can effectively prevent dust and pollutant from accumulating on the surface of the laser radar outer cover
The infrared band applied to the laser radar has no influence of transmittance, and the laser radar has the advantages that: firstly, the micro-nano structure is prepared by adopting a laser direct writing method, and the preparation method is simple and easy to implement and has lower cost. Secondly, in the commonly used 905nm and 1550nm wave bands of the laser radar, the optical transmittance of the laser radar can reach more than 99 percent, and the laser radar cover is suitable for being used as a laser radar outer cover.
Drawings
The advantages of the above and/or additional aspects of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic block diagram of a laser direct write architecture with self-cleaning functionality according to one embodiment of the present application;
FIG. 2 is a photomicrograph of a laser direct write structure according to one embodiment of the present application;
FIG. 3 is a schematic illustration of a static contact angle of a laser direct-write structure with a water droplet corresponding to group A parameters according to one embodiment of the present application;
FIG. 4 is a schematic illustration of a static contact angle of a laser direct-write structure with a water droplet corresponding to group B parameters according to one embodiment of the present application;
FIG. 5 is a schematic illustration of a static contact angle of a laser-direct written structure with a water droplet corresponding to group C parameters, in accordance with an embodiment of the present application;
FIG. 6 is a schematic block diagram of a laser direct write architecture with self-cleaning functionality according to another embodiment of the present application;
FIG. 7 is a schematic illustration of the optical transmittance of a lidar housing according to an embodiment of the present application.
Detailed Description
In order that the above objects, features and advantages of the present application can be more clearly understood, the present application will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a laser direct writing structure with a self-cleaning function, including: a glass substrate 1, a micro-nano structure 2 and a treatment liquid.
The glass substrate 1 in this embodiment may be made of conventional organic glass.
The treatment liquid in this example serves as a hydrophobic layer on the upper surface of the laser direct writing structure.
The micro-nano structures 2 are arranged on the upper surface of the glass substrate 1, wherein the micro-nano structures 2 are polygonal bodies, the distance D between every two adjacent micro-nano structures 2 is 50-100 micrometers, the height H of each micro-nano structure 2 is 10-20 micrometers, and the side length L is about 10 micrometers.
In this embodiment, the micro-nano structures 2 are etched on the upper surface of the glass substrate 1 in a laser direct writing manner, wherein the micro-nano structures 2 are distributed on the glass substrate 1 in an array manner.
In the etching process, a carbon dioxide laser with the wavelength of 10.6 microns is adopted to emit laser beams with variable intensity to the upper surface of the glass substrate 1, so that the micro-nano structure 2 is etched.
The intensity of the laser beam is not limited in this embodiment.
Specifically, the micro-nano structure 2 is a patterned protrusion, and the patterned protrusion may be a regular polygon, such as a cube, a cuboid, a prism, or the like.
In a preferred implementation manner of this embodiment, the upper surface of the micro-nano structure 2 further includes a secondary composite structure 3, the secondary composite structure 3 is arranged in an array on the upper surface of the micro-nano structure 2, and the secondary composite structure 3 is formed by performing secondary laser direct writing etching on the upper surface of the micro-nano structure 2. Etching the glass substrate 1 to form a strip-shaped channel by first laser direct writing etching, and marking the reserved part on the glass substrate 1 as a micro-nano structure 2; and then, carrying out second laser direct writing etching, and recording the part reserved on the upper surface of the micro-nano structure 2 as a secondary composite structure 3.
The shape of the secondary composite structure 3 can be the same as that of the micro-nano structure 2, the distance between two adjacent secondary composite structures 3 is 100-200nm, and the height is 100-200 nm. Through testing, the laser direct writing structure of the secondary composite structure 3 is arranged, so that the self-cleaning effect can be further improved.
When the secondary laser direct writing etching is carried out, the type of the laser can be determined according to the structural parameters of the secondary composite structure 3.
As shown in fig. 2, the micro-nano structure 2 is set as a cube in this embodiment, and a three-group structure contrast test is set to explain the self-cleaning performance of the laser direct writing structure, and the selected three-group structure parameters are:
the A group parameters are: the side length is 120 microns, the height is 10 microns, and the surface of the glass is sprayed with treatment fluid;
the B group parameters are: the side length is 50 microns, the height is 30 microns, and the same treatment fluid is sprayed on the surface of the glass;
group C parameters are: the side length is 90 microns, the height is 15 microns, and the same treatment fluid is sprayed on the surface of the side length.
The laser direct writing structure and the water drop above the laser direct writing structure were photographed as shown in fig. 3 to 5 in sequence, wherein the data obtained by measuring the static contact angle and the rolling angle are shown in table 1.
TABLE 1
| Group of | Spacing (micron) | Height (micro)Rice) | Static contact Angle (°) | Rolling angle (°) |
| Group A | 120 | 10 | 130 | ＞20 |
| Group B | 50 | 30 | 120 | ＞30 |
| Group C | 90 | 15 | 160 | <5 |
The static contact angle is an angle between a boundary 301 of a gas and a liquid and a boundary 302 of a solid when the liquid reaches equilibrium on the solid surface.
The rolling angle is the critical angle formed by the inclined surface and the horizontal plane when the liquid drop just rolls on the inclined surface.
Through the comparison test, the static contact angle of the laser direct writing structure surface corresponding to the group C parameters is about 160 degrees, the rolling angle is less than 5 degrees, the laser direct writing structure surface is a super-hydrophobic structure surface, the surface of the laser direct writing structure surface is not beneficial to the stay of water drops, the water drops are more easy to slide, and the self-cleaning effect is favorably realized; the static contact angles of the surfaces of the laser direct writing structures corresponding to the group A and the group B parameters are both smaller than 150 degrees, the surfaces are common hydrophilic surfaces, dust and dirt are easily adsorbed on the surfaces, and the self-cleaning effect is avoided. Therefore, the self-cleaning function of the C-set parameters in the embodiment is better than that of the laser direct-writing structure corresponding to the A, B-set parameters.
On the basis of the above-described embodiment, a set of laser direct-write structures including the secondary composite structure 3 is further provided, as shown in fig. 6, and the structural parameters thereof are shown in table 2.
TABLE 2
The data show that the static contact angle of the laser direct writing structure provided with the secondary composite structure 3 is about 170 degrees, so that water drops can slide off more easily, and the self-cleaning effect can be realized.
The treatment liquid is coated or soaked on the surfaces of the micro-nano structures 2 and the exposed glass substrate 1 between two adjacent micro-nano structures 2 to improve the static contact angle of the laser direct writing structure, wherein the solvent of the treatment liquid is toluene, the solute of the treatment liquid is dodecyl trichlorosilane, and the concentration of the treatment liquid is 1g/ml-3 g/ml. After the solution treatment, the prepared surface is washed by clear water, and the preparation is finished.
Dodecyl trichlorosilane in the treatment liquid and the surface of the micro-nano structure 2 are subjected to chemical reaction, the surface of glass is provided with dangling bond hydroxyl, and the hydroxyl and the dodecyl trichlorosilane are subjected to chemical reaction, so that dodecyl trichlorosilane molecules are attached to the surface of the prepared micro-nano structure 2, and thus the surface of the prepared micro-nano structure 2 can further reduce a static contact angle and a rolling angle, and the super-hydrophobic and self-cleaning effects are better realized.
Specifically, this example also tested the selection of the treatment solution through a number of comparative tests, and now uses octadecyltrichlorosilane as a comparison to prove the superiority of the treatment solution in this example.
The side length of the micro-nano structure 2 is set to be 90 micrometers, the height of the micro-nano structure is set to be 15 micrometers, and the treatment liquid sequentially comprises the following components:
group I parameters: clear water;
and II groups of parameters: the solvent is toluene, the solute is octadecyl trichlorosilane, and the concentration is 1.5 g/ml;
group III parameters: the solvent is toluene, the solute is dodecyl trichlorosilane, and the concentration is 1.5 g/ml.
The laser direct write structure and the water drop above it were photographed and the data obtained by measuring the static contact angle is shown in table 3.
TABLE 3
| Group of | Solvent(s) | Solute | Concentration (g/ml) | Static contact Angle (°) |
| Group I | Water (W) | - | - | 100 |
| Group II | Toluene | Octadecyltrichlorosilane | 1.5 | 120 |
| Group III | Toluene | Dodecyl trichlorosilane | 1.5 | 160 |
According to the comparison test, the laser direct writing structure corresponding to the group III parameters is a super-hydrophobic structure surface, the surface of the laser direct writing structure is not beneficial to the stay of water drops, and the water drops are easy to slide; the static contact angles of the laser direct-writing structure surfaces corresponding to the parameters of the group I and the group II to water drops are both less than 150 degrees, the laser direct-writing structure surfaces are common hydrophilic surfaces, dust and stains are easily adsorbed on the surfaces, and the self-cleaning effect is avoided. Therefore, the self-cleaning function of the group III parameters in the embodiment is superior to that of the laser direct writing structure corresponding to the group I and the group II parameters.
Example two:
this embodiment provides a laser radar dustcoat, this laser radar dustcoat's the cover body is made by the laser structure of directly writing, and this laser structure of directly writing includes: the device comprises a glass substrate, a micro-nano structure and a treatment liquid; the micro-nano structure is arranged on the upper surface of the glass substrate, the micro-nano structure is formed by exposing and etching a laser on the glass substrate through a laser beam with variable intensity, and the micro-nano structure is distributed on the glass substrate in an array mode, wherein the micro-nano structure is a polygon, the side length is 50-100 micrometers, and the height is 10-20 micrometers.
The treatment liquid is coated on the surfaces of the micro-nano structures and a glass substrate exposed between two adjacent micro-nano structures to improve the static contact angle of the laser direct writing structure, wherein the solvent of the treatment liquid is toluene, the solute is dodecyl trichlorosilane, and the concentration is 1g/ml-3 g/ml.
Further, this laser radar dustcoat still includes: at least a set of heating electrode, heating electrode include positive pole and negative pole, and heating electrode sets up in the inboard of the cover body, and heating electrode is used for heating the dustcoat.
Through set up at least a set of heating electrode in the inboard of the cover body, can carry out the ohmic heating to this laser direct writing structure (the cover body) that has self-cleaning function, realize the cleaing away of ice, frost and rainwater, guarantee that laser radar can normally work under abominable weather condition.
Further, this laser radar dustcoat still includes: and the electrifying protection device is arranged on the heating electrode so as to protect the electrified heating electrode.
The optical transmittance test was performed on the cover body of the laser radar housing made of the above-described laser direct writing structure, as shown in fig. 7.
In the common 905nm and 1550nm wave bands of the laser radar, the optical transmittance of the cover body in the embodiment can reach more than 99%, and the cover body is suitable for being used as a laser radar outer cover.
The technical scheme of the application is explained in detail in the above with reference to the accompanying drawings, and the application provides a laser direct writing structure with a self-cleaning function and a laser radar outer cover, wherein a cover body of the laser radar outer cover is made of the laser direct writing structure, and the laser direct writing structure comprises: the device comprises a glass substrate, a micro-nano structure and a treatment liquid; the micro-nano structure is arranged on the upper surface of the glass substrate; the treatment liquid is coated on the surfaces of the micro-nano structures and the glass substrate exposed between two adjacent micro-nano structures so as to improve the static contact angle of the laser direct writing structure. Through the technical scheme in this application, effectively solve foreign matters such as dust and to the interference of laser radar work, further improve laser radar's environmental suitability and reduce laser radar system's maintenance cost.
The steps in the present application may be sequentially adjusted, combined, and subtracted according to actual requirements.
The units in the device can be merged, divided and deleted according to actual requirements.
Although the present application has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present application. The scope of the present application is defined by the appended claims and may include various modifications, adaptations, and equivalents of the subject application without departing from the scope and spirit of the present application.
Claims (7)
1. A laser direct writing structure with a self-cleaning function, comprising: the glass substrate (1), the micro-nano structure (2) and the hydrophobic layer;
the micro-nano structures (2) are etched on the upper surface of the glass substrate (1) in a laser direct writing mode, wherein the distance between every two adjacent micro-nano structures (2) is 50-100 micrometers, and secondary composite structures (3) are also laser etched on the upper surface of each micro-nano structure (2);
the hydrophobic layer is coated on the surface of the micro-nano structure (2) and the exposed glass substrate (1) between two adjacent micro-nano structures (2) so as to improve the static contact angle of the laser direct writing structure.
2. The laser direct writing structure with self-cleaning function according to claim 1, wherein the micro-nano structure (2) is a polygonal body.
3. The laser direct writing structure with self-cleaning function according to claim 1, characterized in that the height of the micro-nano structure (2) is 10-20 μm.
4. The laser direct writing structure with self-cleaning function according to claim 1, wherein the micro-nano structure (2) is formed by exposing and etching a laser on the glass substrate (1) through a laser beam with variable intensity.
5. The laser direct writing structure with self-cleaning function according to claim 4, characterized in that the micro-nano structures (2) are distributed in an array on the glass substrate (1).
6. A lidar housing, wherein the housing of the lidar housing is formed from a laser direct write structure according to any of claims 1 to 5.
7. The lidar enclosure of claim 6, further comprising: at least a set of heating electrode, heating electrode includes positive pole and negative pole, heating electrode set up in the inboard of the cover body, heating electrode is used for to the dustcoat heats.
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| CN202021943974.0U CN213903783U (en) | 2020-09-08 | 2020-09-08 | Laser direct writing structure with self-cleaning function and laser radar outer cover |
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| CN202021943974.0U CN213903783U (en) | 2020-09-08 | 2020-09-08 | Laser direct writing structure with self-cleaning function and laser radar outer cover |
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