CN111929968A - Spraying feature extraction device and method based on sheet light - Google Patents

Abstract

The invention relates to a spray feature extraction device and method based on sheet light, wherein the device includes two parts: a sheet light system and a collection system. Among them, the light part includes the base, the laser bracket, the laser, the lens, and the lens bracket. The acquisition system is a camera. The positions of the spray and the sheet light are perpendicular to each other, and the camera is collecting the spray. The laser forms a sheet of light through a lens, after which the spray is cut. On the cut surface, there will be light in the area where the spray and laser intersect. Take pictures with a camera to capture the shape of the cross section of the spray at different distances. The invention also provides a spray feature extraction method based on sheet light, which can extract spray features without disturbing the normal spraying of the spray, and the solution can be transferred to other related fields.

Description

A spray feature extraction device and method based on sheet light

technical field

The invention relates to the field of laser diagnosis and spray technology, and in particular to a device and method for extracting spray features based on sheet light.

Background technique

Spray science has become an international field of study. Because of its wide range of applications, it can be applied to spray combustion, cleaning sensors, cleaning glass, from rocket spray, car spray to spray in home life, the application of spray is far beyond people's imagination.

There are microscopic and macroscopic characteristics of spray. Microscopically, there are spray particle size, etc., and macroscopically, there is spray cross-sectional area. Among them, the characteristics of macroscopic characteristics such as spray area are important characteristics of spray. For example, in the field of cleaning, under the same injection pressure, the larger the cross-sectional area of the spray, the wider the cleaning range.

Laser diagnosis is widely used because it does not interfere with the normal process of the diagnosed object. Therefore, the present invention is practically applied in spray technology in combination with laser diagnosis.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a spray feature extraction device and method based on sheet light in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

A spray feature extraction device based on sheet light, the device comprises a sheet light system part that is arranged perpendicular to the spray direction and a collection system part that is arranged opposite to the spray direction, the sheet light system part comprises a base, on the base A laser support and a circular lens support are provided, the laser support is provided with a laser, the circular lens support is provided with a lens, and the acquisition system part includes a camera.

Further, the heights of the laser and the lens relative to the base are the same.

Further, a retractable screw cover is provided on the circular lens holder, the lens is arranged on the retractable screw cover, and the lens is arranged on the circular cover through the retractable screw cover. on the lens holder.

Further, the surface shape of the retractable screw cap is circular.

Further, the retractable cap is also provided with a telescopic cap control rod for controlling the telescopic cap to extend.

Further, the retractable screw cap is a retractable screw cap made of phenolic plastic.

Further, the surface shape of the lens is circular.

Further, the lens adopts a one-word lens.

The present invention also provides a spray feature extraction method using the described sheet light-based spray feature extraction device, the method comprising the following steps:

Step 1: Adjust and fix the lens and turn on the laser through the retractable screw cap set on the circular lens holder and the retractable screw cap lever set on the retractable screw cap forming surface light through the lens;

Step 2: Adjust the orientation of the surface light and the spraying direction to be mutually perpendicular to each other, adjust the orientation of the camera to face the spraying direction, and then form a light image at the intersection with the surface light when spraying;

Step 3: use the camera to take the light map to obtain a cross-sectional area map of the spray at the corresponding distance;

Step 4: move the camera to adjust its distance relative to the light map, and repeatedly shoot to obtain cross-sectional area maps of the spray at different distances;

Step 5: splicing all the cross-sectional area maps of the spray at different distances to obtain a three-dimensional image of the spray spray, and based on the three-dimensional image, the spray characteristics are further finally obtained.

Further, in the step 1, a retractable screw cap arranged on the circular lens holder and a retractable screw cap control rod arranged on the retractable screw cap are used to adjust the fixed position of the lens. The process specifically includes: firstly rotating the retractable capping lever clockwise to make the retractable capping extend outward to the position of the maximum telescopic distance, and then set the lens on the retractable cap At the central position of the retractable cap, then counterclockwise the retractable cap control lever to retract the retractable cap until the lens can be fixed during the retracting process of the retractable cap Stop spinning.

Compared with the prior art, the present invention has the following advantages:

(1) The device of the present invention includes two parts, the light-sheet part and the collection part. The sheet light part includes a base, a laser bracket connected to the base, and the laser bracket is used to place the laser. Lens holder attached to the base. The lens holder is used to fix the lens and the laser at the same height, the sheet light system is perpendicular to the spray direction, and the camera of the acquisition system is facing the spray direction, which is convenient for collecting images. When spraying is performed, the part where the spray part and the surface light part intersect has light. Taking this light map, the characteristics of the spray at this distance can be obtained. On the premise of not interfering with the normal process of the spray, the spray at any distance can be obtained. Light map of cross-sectional area.

(2) The circular lens holder in the device of the present invention includes upper and lower parts, the lower part is a holder, and the upper part is a circular retractable screw cover. And has a joystick to control. Rotate the lever counterclockwise, the retractable screw cap retracts inward, and rotate the lever clockwise, the retractable screw cap is outward. It is important to place the lens on the retractable screw cap, and the lens is fixed by the control rod. The device has a lens fixing device to solve the problem of difficult fixing of the lens.

(3) The retractable screw cap in the device of the present invention is made of phenolic plastic. In order to ensure that the lens is fixed without damaging the lens, phenolic plastic is used. , so as to obtain other characteristics of the spray, the device is simple and easy to assemble, the scheme is easy to operate, and the repeatability is relatively strong.

Description of drawings

Fig. 1 is the overall structure diagram of the spray feature extraction device based on sheet light of the present invention;

Fig. 2 is the partial structure diagram of the circular lens support part in the spray feature extraction device based on sheet light of the present invention;

In the figure, 1 is an optical system, 2 is an acquisition system, 3 is a base, 4 is a laser bracket, 5 is a laser, 6 is a lens, 7 is a circular lens bracket, 8 is a camera, and 9 is a retractable screw cover. 10 is a retractable capping lever.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

specific embodiment

A spray feature extraction device based on sheet light of the present invention, the structure of which is shown in FIG. 1 , includes two parts: a sheet light system 1 and a collection system 2 . The sheet optical system includes a base 3 , a laser bracket 4 , a laser 5 , a lens 6 , a circular lens bracket 7 , and the acquisition system 2 includes a camera 8 .

The detailed schematic diagram of the circular lens holder 7 is shown in FIG. 2 . The circular lens holder 7 includes two parts, the lower part is the circular lens holder 7 , the upper part is a retractable cap 9 , the retractable cap lever 10 that controls the retractable cap 9 , the lens 6 . Rotate the control rod counterclockwise, the retractable screw cover retracts inward, and rotate the control rod clockwise, the retractable screw cover extends outward.

The lens 6 used in this embodiment is a straight-line lens, which can effectively refract light into a surface light source.

In this embodiment, the retractable capping lever 10 is first rotated clockwise, so that the retractable capping 9 extends outwards to the maximum point. Place the lens 6 in the center of the retractable screw cap 9, and rotate the retractable screw cap lever 10 counterclockwise to shrink the retractable screw cap 9 inward, and stop rotating when the in-line lens can be fixed.

In order to fix the in-line lens, and in order not to damage the lens 6, the material of the retractable screw 9 is phenolic plastic.

After the in-line lens is fixed, the laser 5 is turned on, and the laser passes through the in-line lens to form surface light.

Adjust the angle of the face light and spray so that they are perpendicular to each other. And adjust the camera 8 to face the spray. After all angles are adjusted, open the nozzle and let it spray. Light will appear at the intersection of the spray and the surface light. Use the camera 8 to take this light map to obtain a cross-sectional area map of the spray at this distance.

By moving different distances, repeatedly taking spray maps, and stitching them together, a three-dimensional image of the spray spray can be obtained. Thus, rich spray characteristics can be obtained. If the cross-sectional area at a certain distance can be obtained, the characteristics such as the effective distance of the spray can be obtained.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a spraying feature extraction device based on piece light, its characterized in that, the device include with spraying direction looks perpendicular piece light system (1) part that sets up and just to the collection system (2) part that sets up with the spraying direction, piece light system (1) part includes base (3), be equipped with laser instrument support (4) and circular lens support (7) on base (3), be equipped with laser instrument (5) on laser instrument support (4), be equipped with lens (6) on circular lens support (7), collection system part includes camera (8).

2. A plate light based spray feature extraction device according to claim 1, wherein the height of the laser (5) and the lens (6) relative to the base (3) is the same.

3. A spray feature extraction device based on sheet light according to claim 1, characterized in that a retractable screw cap (9) is provided on the circular lens support (7), the lens (6) is provided on the retractable screw cap (9), and the lens (6) is provided on the circular lens support (7) through the retractable screw cap (9).

4. A plate light based spray pattern extraction device according to claim 3, wherein the retractable screw cap (9) is circular in surface shape.

5. A spraying feature extraction device based on a sheet of light as claimed in claim 3, wherein the retractable screw cap (9) is further provided with a retractable screw cap control rod (10) for controlling the retractable screw cap (9) to retract.

6. A plate light based spray pattern extraction device as claimed in claim 3, wherein said retractable screw cap (9) is made of phenolic plastic.

7. A plate light based spray pattern feature extraction device according to any one of claims 1 to 6, wherein the lens (6) has a circular surface shape.

8. A plate light based spray pattern feature extraction device according to any one of claims 1 to 6, wherein the lens (6) is a line lens.

9. A spray feature extraction method using the sheet light-based spray feature extraction device according to any one of claims 1 to 6, comprising the steps of:

step 1: the lens (6) is adjusted and fixed through a telescopic screw cover (9) arranged on the circular lens support (7) and a telescopic screw cover control rod (10) arranged on the telescopic screw cover (9), and the laser (5) is opened to form surface light through the lens (6);

step 2: adjusting the direction of the surface light and the spraying direction to be mutually perpendicular, adjusting the direction of the camera (8) to be over against the spraying direction, and then forming a light pattern at the intersection of the surface light and the spraying direction;

and step 3: shooting the light pattern by using the camera (8) to obtain a cross-sectional area pattern of the spray at a corresponding distance;

and 4, step 4: moving the camera (8) to adjust the distance of the camera relative to the light pattern, and repeatedly shooting to obtain cross-sectional area patterns of the spray at different distances;

and 5: and splicing the cross-sectional area graphs of the sprays at all different distances to obtain a three-dimensional image of the spray jet, and further finally obtaining the spray characteristics based on the three-dimensional image.

10. The method for extracting spray features by using the device for extracting spray features based on sheet light according to claim 9, wherein the step 1 of adjusting and fixing the lens (6) by the retractable cover screw (9) disposed on the circular lens support (7) and the retractable cover screw control rod (10) disposed on the retractable cover screw (9) specifically comprises: firstly, the retractable screwing cover control rod (10) is rotated clockwise so that the retractable screwing cover (9) extends outwards and extends to the position with the maximum retractable distance, then the lens (6) is arranged at the central position of the retractable screwing cover (9), then the retractable screwing cover control rod (10) is rotated anticlockwise so that the retractable screwing cover (9) retracts, and the rotation is stopped when the lens (6) can be fixed in the retracting process of the retractable screwing cover (9).

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