CN115256743B - Lens pouring device capable of accurately detecting and controlling liquid level - Google Patents
Lens pouring device capable of accurately detecting and controlling liquid level Download PDFInfo
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- CN115256743B CN115256743B CN202210732403.XA CN202210732403A CN115256743B CN 115256743 B CN115256743 B CN 115256743B CN 202210732403 A CN202210732403 A CN 202210732403A CN 115256743 B CN115256743 B CN 115256743B
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- 239000007788 liquid Substances 0.000 title claims abstract description 57
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 230000004044 response Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
Abstract
The invention relates to a lens pouring device for accurately detecting and controlling liquid level, wherein the control device comprises an FPGA module, a lens mould, a backlight source, a control valve, a pouring head, a transverse piece and a camera; wherein the transverse sheet is closely attached to the lens mold, and the contact part of the transverse sheet and the lens mold is positioned at the uppermost part of the lens mold; the backlight source and the camera are respectively arranged at two sides of the lens mould; the pouring head is closely attached to the lens mold, the pouring head is connected with a hose, and the control valve is arranged on the hose; the FPGA module is respectively connected with the control valve and the camera in a communication way; the edge of the transverse piece, which is clung to the lens mould, is in a grid shape; through set up the edge of grid form on the violently piece, make liquid level and fence form the contrast, guarantee that the FPGA module can accurately discern the image that sets up in axial camera collection.
Description
Technical Field
The invention relates to the field of lenses, in particular to a lens pouring device capable of accurately detecting and controlling liquid level.
Background
The production of resin lenses requires casting of the mold, wherein the casting process can be completed by an operator or automatically by the device. In the manual operation process, an operator is required to approach the pouring head to the mold, and the switch of the pouring head is manually controlled to control the liquid injection in the mold, so that the filled mold is required to be full of liquid, free of overflow and free of bubbles. The manual pouring requires more manpower and time, and the operators need to keep concentration all the time, so that the operators are easy to fatigue. Therefore, in most of production enterprises with high modernization degree, the casting is automatically finished by adopting the device. In the automatic pouring process of the device, images are acquired through the camera, the liquid level of the die in the images is identified, and then the switch of the pouring head is controlled, wherein the camera can be arranged in the direction of the main shaft or the direction of the side shaft of the die. However, no matter the liquid level is measured by the main shaft or the side shaft, since the liquid level is only provided with a projection line, even if the light supplementing in the main shaft direction or the light supplementing in the side shaft direction is carried out, the liquid level is still not obvious, and the image identification is easy to be wrong, so that the casting is failed.
On the other hand, the conventional control valve for the pouring head adopts a control valve which is directly opened and closed, and the closing time and the severity of the control valve are in actual operation, so that the response time of the control valve is required to be in ms level ideally, and therefore, the conventional control valve is difficult to realize accurate full stop.
In view of the foregoing, there is a need for a lens casting device that can be accurately identified and precisely controlled.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a lens pouring device capable of accurately detecting and controlling liquid level, which is simple in structure and convenient to use.
A lens casting liquid level control device based on FPGA visual detection comprises an FPGA module, a lens mold, a backlight source, a control valve, a casting head, a transverse sheet and a camera; wherein the transverse sheet is closely attached to the lens mold, and the contact part of the transverse sheet and the lens mold is positioned at the uppermost part of the lens mold; the backlight source and the camera are respectively arranged at two sides of the lens mould; the pouring head is closely attached to the lens mold, the pouring head is connected with a hose, and the control valve is arranged on the hose; the FPGA module is respectively connected with the control valve and the camera in a communication way; the edge of the transverse piece, which is clung to the lens mould, is in a grid shape.
Further, the lens mold is disc-shaped, the central axis direction of the lens mold is taken as the main axis direction, and the radial direction is taken as the side axis direction; the lens mold comprises a left mold, a right mold and a film, wherein the left mold and the right mold are symmetrically arranged, a set distance is arranged between the left mold and the right mold at intervals, the film is arranged between the left mold and the right mold for sealing edges, and the film is arranged on the side surfaces of the left mold and the right mold; the film is provided with an injection port when edge sealing is carried out; the left die and the right die are round sheet-shaped, and are made of transparent materials.
Further, the transverse piece is in a triangular prism shape; the transverse film is pressed on the film, and the film is pressed on the left die and the right die; the transverse piece keeps a set angle with the vertical direction.
Further, the pouring head is arranged at the position of the pouring opening on the side surfaces of the left die and the right die; the pouring head is vertically opposite to the pouring inlet; one end of the pouring head, which is far away from the lens mould, is connected with a hose which is used for guiding liquid.
Further, the control valve comprises a steering engine, a cam and a fixing piece, wherein the fixing piece comprises a U-shaped groove, and a hose penetrates through the U-shaped groove of the fixing piece; the cam is arranged at the output end of the steering engine, and can rotate along with the rotation of the output end of the steering engine; the cam is positioned in the U-shaped groove of the fixing piece.
Further, the backlight source and the camera are both arranged in the side shaft direction of the lens mold; the backlight is arranged on one side close to the transverse sheet, and the camera is arranged on one side close to the pouring head.
A lens casting liquid level control method based on FPGA visual detection comprises the following steps:
step 1: after the adhesive tape is torn, the FPGA module sends a trigger signal to the camera, the camera is started, and an image is acquired and fed back in real time;
step 2: the FPGA module receives the image, identifies the injection region, and marks the stopping region R1 and the deceleration region R2; after marking is completed, the transverse sheet is abutted against the injection port of the adhesive tape of the lens mold, and the FPGA module sends a full-open signal to the control valve;
step 3: the control valve receives a full-open signal, and the steering engine controls the cam to rotate, so that the cam does not squeeze the hose, and the pouring head rapidly injects liquid into the lens mould;
step 4: the camera collects images and transmits the images to the FPGA module;
step 5: the FPGA module receives the image data, recognizes and detects the image and judges whether the liquid level reaches a deceleration area or not; if the liquid level reaches the deceleration area, the step 6 is entered; otherwise, returning to the step 4 after the interval is set for time t 1;
step 6: the FPGA module gives a deceleration signal to the control valve; the control valve receives a deceleration signal, and the steering engine controls the cam to rotate by a set angle r1, so that the cam extrudes part of the hose;
step 7: the camera collects images and transmits the images to the FPGA module;
step 8: the FPGA module receives the image data, recognizes and detects the image and judges whether the liquid level reaches a stop area or not; if the liquid level has reached the stop area, step 9 is entered; otherwise, returning to the step 7 after the interval is set for time t 2;
step 9: the FPGA module gives a stop signal to the control valve; the control valve receives a stop signal, and the steering engine controls the cam to rotate by a set angle r2, so that the cam extrudes all hoses; the film was cut, the inlet was closed with the film, and the process was terminated.
Further, the identifying process of the FPGA module in the step 2 includes the following steps:
step 21: the FPGA module reads the image data and carries out binarization processing on the image; marking coordinates of each pixel point in the image according to the line field synchronizing signals image_x and image_y;
step 22: accumulating black points in pixel points of each row in the image according to the field synchronous signals, and judging whether the number of the black points in each row is larger than a set value or not from bottom to top; if the number of black dots in the row is greater than the set value, the upper boundary of the lens mold is recorded, and the step 23 is entered; otherwise, after traversing the image, returning to the step 21, wherein whether the image traversing is completed or not is judged according to the line synchronizing signal;
step 23: scanning one row defined as the upper boundary of the lens mold in the image one by one from left to right, wherein the image_x of the first pixel point from black to white is marked as the left boundary left of the lens mold, and then the image_x of the pixel point from white to black is marked as the right boundary right of the lens mold;
step 24: setting a stopping area R1 in the areas of the left and right boundaries, wherein the stopping area R1 is on the upper boundary of the lens mould; a deceleration region R2 is provided, wherein the deceleration region R2 is below the stop region R1 and is kept at a set distance from the stop region R1, and the step is ended.
Further, the stopping region R1 and the decelerating region R2 in the step 24 are rectangular regions with set length and width, respectively.
Further, the process of performing image recognition detection by the FPGA module in step 5 includes:
step 51: the FPGA module reads the image, carries out binarization processing on the image, and marks the coordinates of each pixel point in the image according to line-field synchronous signals image_x and image_y;
step 52: judging whether the pixels in the deceleration region R2 are completely black, if so, entering a step 6; otherwise, after the interval is set for time t1, returning to the step 4.
The beneficial effects of the invention are as follows:
the liquid level is compared with the fence by arranging the grid-shaped edges on the transverse sheet, so that the FPGA module is ensured to accurately identify the image acquired by the camera arranged in the axial direction;
by arranging the control valve comprising a cam, the control valve can control the flow rate besides the control switch, so that more accurate control is realized;
detecting and identifying whether the liquid level reaches a deceleration region R2 and a stop region R1 through an FPGA module, realizing the opening, partial closing and full closing of an automatic control valve, reducing the content of manual operation and improving the operation precision;
through setting up the region R2 that slows down, combine the cam in the control valve, realize partly closing, make the liquid level reach behind the region R2 that slows down, the velocity of flow of pouring head injection liquid reduces, more easily controls the liquid level, avoids liquid to spill over.
Drawings
FIG. 1 is an overall construction diagram of a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a conventional combination of a cross piece and a lens mold;
FIG. 3 is a schematic diagram showing the combination of a cross piece and a lens mold according to a first embodiment of the present invention;
FIG. 4 is a binarized image of a conventional cross piece and lens mold side axis direction image;
FIG. 5 is a binarized image of a lateral image of a lens mold and a cross piece according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram of a control valve according to a first embodiment of the present invention;
FIG. 7 is an overall flow chart of a first embodiment of the present invention;
FIG. 8 is a total computation flow chart of an FPGA module according to a first embodiment of the present invention;
FIG. 9 is a flowchart of the FPGA identification image in step 2 according to the first embodiment of the present invention;
fig. 10 is a schematic diagram of a stopping region R1 and a decelerating region R2 according to the first embodiment of the present invention;
FIG. 11 is a schematic view of a liquid level falling outside the deceleration region R2 according to the first embodiment of the present invention;
FIG. 12 is a schematic flow chart of an FPGA control valve according to a first embodiment of the present invention;
the attached drawings are used for identifying and describing: lens mould 1, backlight 2, control valve 3, steering wheel 31, cam 32, mounting 33, pouring head 4, violently piece 5, camera 6, hose 7, traditional violently piece 8.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict.
It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Embodiment one:
as shown in fig. 1, a lens casting liquid level control device based on FPGA visual inspection includes an FPGA module, a lens mold 1, a backlight source 2, a control valve 3, a casting head 4, a cross lens 5, and a camera 6. Wherein the transverse sheet 5 is closely attached to the lens mould 1, and the contact part of the transverse sheet 5 and the lens mould 1 is positioned at the uppermost part of the lens mould 1; the backlight source 2 and the camera 6 are respectively arranged at two sides of the lens mould 1; the pouring head 4 is closely attached to the lens mould 1, the pouring head 4 is connected with a hose 7, and the control valve 3 is arranged on the hose 7; the FPGA module is respectively in communication connection with the control valve 3 and the camera 6. In this example the FPGA module is arranged on the camera 6.
The lens mold 1 is disc-shaped, the central axis direction of the lens mold 1 is taken as a main axis direction, and the radial direction is taken as a side axis direction, wherein the side axis direction is perpendicular to the main axis direction. The lens mold 1 comprises a left mold, a right mold and a film, wherein the left mold and the right mold are symmetrically arranged, a distance is set between the left mold and the right mold at intervals, the film is arranged between the left mold and the right mold for sealing edges, and the film is arranged on the side surfaces of the left mold and the right mold. Wherein the film is sealed with an injection port for injecting liquid between the left and right dies. When the left and right molds are vertically arranged, the film injection port is positioned uppermost. The left die and the right die are round flaky, and are made of transparent materials, so that the liquid level can be observed conveniently.
As shown in fig. 2-5, the cross piece 5 is in a triangular prism shape, wherein one edge is provided with uniform notches to form a grid shape, and the grid-shaped edge of the cross piece 5 is tightly attached to the side surface of the lens mold 1. The transverse film 5 presses the film against the left and right molds to prevent the film from being separated from the sides of the left and right molds by a pulling force. The transverse sheet 5 maintains a set angle with the vertical direction, wherein the range of the set angle is 15-75 degrees; in this case a 45 ° angle, in order that the transverse web 5 does not block the vertically arranged pouring head 4. In actual operation, since the cross piece 5 is used for film, and the film injection port is located at the uppermost position, the contact position of the cross piece 5 with the lens mold 1 and the uppermost position of the lens mold 1 will be kept at a small distance, which means that in the image in the side axis direction, the cross piece 5 will be partially overlapped with the image of the lens mold 1, and if the conventional cross piece 87 is used, the liquid level will be blocked; in this example, the edges of the transverse sheet 5 are arranged in a grid shape, so that the liquid level of the overlapped area can be clearly displayed, and the accuracy of liquid level detection is ensured.
The pouring head 4 is arranged at the position of the pouring opening on the side surfaces of the left die and the right die, wherein the pouring head 4 is vertically opposite to the pouring opening, so that the injected liquid is prevented from leaking, and on the other hand, bubbles generated during liquid injection are reduced. The end of the casting head 4 remote from the lens mould 1 is connected with a hose 7, the hose 7 being used for guiding the liquid.
As shown in fig. 6, the control valve 3 comprises a steering engine 31, a cam 32 and a fixing member 33, wherein the fixing member 33 comprises a U-shaped groove, and the hose 7 passes through the U-shaped groove of the fixing member 33. The cam 32 is arranged at the output end of the steering engine 31, and the cam 32 can rotate along with the rotation of the output end of the steering engine 31; the cam 32 is located in a U-shaped slot of the mount 33. The plane in which the rotation direction of the cam 32 is parallel to the flow direction of the liquid in the hose 7 ensures that the cam 32 can play a role in extruding the hose 7 when rotating, and the circulation and blocking of the liquid in the hose 7 are controlled along with the rotation of the cam 32 by combining the U-shaped groove structure of the fixing piece 33. In this embodiment, the rudder 31 is screwed to the mount 33.
The backlight source 2 and the camera 6 are both arranged in the side axis direction of the lens mold 1, in this example, the backlight source 2 is arranged at one side close to the transverse sheet 5, and the camera 6 is arranged at one side close to the casting head 4; in some other embodiments, the backlight 2 may be disposed on a side close to the casting head 4, and the camera 6 may be disposed on a side close to the traverse 5. The camera 6 is an image sensor controlled by an FPGA, so that the rapid acquisition and high-speed transmission of images can be realized, and the response delay is reduced.
In the implementation process, as the grid-shaped edges are arranged on the transverse sheet 5, the liquid level is compared with the fence, so that the FPGA module can accurately identify the image acquired by the camera 6 arranged in the axial direction; by providing the control valve 3 comprising a cam 32, the control valve 3 is able to control the flow rate in addition to the switching of the casting head, enabling a more accurate control.
As shown in fig. 7 and 8, a lens casting liquid level control method based on FPGA visual detection includes the following steps:
step 1: after the adhesive tape is torn, the FPGA module sends a trigger signal to the camera 6, and the camera 6 is started to acquire and feed back images in real time;
step 2: the FPGA module receives the image, identifies the injection region, and marks the stopping region R1 and the deceleration region R2; after marking, the transverse sheet 5 is abutted against the injection port of the adhesive tape of the lens mold 1, and the FPGA module sends a full-open signal to the control valve 3;
step 3: the control valve 3 receives a full-open signal, and the steering engine 31 controls the cam 32 to rotate, so that the cam 32 does not squeeze the hose 7, and the pouring head 4 rapidly injects liquid into the lens mould 1;
step 4: the camera 6 collects images and transmits the images to the FPGA module;
step 5: the FPGA module receives the image data, recognizes and detects the image and judges whether the liquid level reaches a deceleration area or not; if the liquid level reaches the deceleration area, the step 6 is entered; otherwise, returning to the step 4 after the interval is set for time t 1;
step 6: the FPGA module gives a deceleration signal to the control valve 3; the control valve 3 receives a deceleration signal, and the steering engine 31 controls the cam 32 to rotate by a set angle r1, so that the cam 32 extrudes part of the hose 7;
step 7: the camera 6 collects images and transmits the images to the FPGA module;
step 8: the FPGA module receives the image data, recognizes and detects the image and judges whether the liquid level reaches a stop area or not; if the liquid level has reached the stop area, step 9 is entered; otherwise, returning to the step 7 after the interval is set for time t 2;
step 9: the FPGA module gives a stop signal to the control valve 3; the control valve 3 receives a stop signal, and the steering engine 31 controls the cam 32 to rotate by a set angle r2, so that the cam 32 extrudes all the hoses 7; the film was cut, the inlet was closed with the film, and the process was terminated.
As shown in fig. 9-11, in the step 2, the FPGA module first determines the left and right boundaries of the lens mold 1 and the mold spacing between the left and right molds according to the acquired images, wherein different set times t1 and t2 are set corresponding to different mold spacings, so that the time interval for acquiring the images by the control camera 6 is controlled to meet the corresponding injection requirements, the operation amount of the FPGA module is reduced, and the response speed is improved; in this example, t1 and t2 are set acquisition rates of the FPGA module, which are 16.7ms per frame, so t1 and t2 remain 16.7ms. The identification process of the FPGA module comprises the following steps:
step 21: the FPGA module reads the image data and carries out binarization processing on the image; marking coordinates of each pixel point in the image according to the line field synchronizing signals image_x and image_y;
step 22: accumulating black points in pixel points of each row in the image according to the field synchronous signals, and judging whether the number of the black points in each row is larger than a set value or not from bottom to top; if the number of black dots in the row is greater than the set value, the upper boundary of the lens mold 1 is recorded, and the step 23 is entered; otherwise, after traversing the image, returning to the step 21, wherein whether the image traversing is completed or not is judged according to the line synchronizing signal;
step 23: scanning one row of the image defined as the upper boundary of the lens mold 1 from left to right, wherein the image_x of the first pixel point from black to white is marked as the left boundary left of the lens mold 1, and then the image_x of the pixel point from white to black is marked as the right boundary right of the lens mold 1;
step 24: setting a stop region R1 in the region of the left and right borders, wherein the stop region R1 is on the upper border of the lens mold 1; a deceleration region R2 is provided, wherein the deceleration region R2 is below the stop region R1 and is kept at a set distance from the stop region R1, and the step is ended.
The stop region R1 and the deceleration region R2 in the step 24 are rectangular regions each having a set length and width.
As shown in fig. 12, after receiving the image data, the FPGA module in step 5 and step 8 sends the image data to the memory for buffering. The process of image recognition detection by the FPGA module in the step 5 comprises the following steps:
step 51: the FPGA module reads the image, carries out binarization processing on the image, and marks the coordinates of each pixel point in the image according to line-field synchronous signals image_x and image_y;
step 52: judging whether the pixels in the deceleration region R2 are completely black, if so, entering a step 6; otherwise, after the interval is set for time t1, returning to the step 4.
The process of performing image recognition detection by the FPGA module in the step 8 comprises the following steps:
step 81: the FPGA module reads the image, carries out binarization processing on the image, and marks the coordinates of each pixel point in the image according to line-field synchronous signals image_x and image_y;
step 82: judging whether the pixels in the stopping area R1 are all black, if so, entering a step 9; otherwise, after the interval is set for time t2, returning to the step 7.
It should be noted that, in this example, the FPGA module indirectly controls the operation of the control valve 3 by sending a control signal, and in some other embodiments, the FPGA module may directly control the operation of the control valve 3.
In the implementation process, the FPGA module detects and identifies whether the liquid level reaches the deceleration region R2 and the stop region R1, so that the automatic control valve 3 is opened, partially closed and fully closed; on the other hand, by setting the deceleration region R2 and combining the cam 32 in the control valve 3, partial closing is realized, so that after the liquid level reaches the deceleration region R2, the flow speed of the liquid injected by the pouring head 4 is reduced, the liquid level is easier to control, and the liquid is prevented from overflowing.
The above description is only one specific example of the present invention and does not constitute any limitation on the present invention. It will be apparent to those skilled in the art that various modifications and changes in form and details may be made without departing from the principles and construction of the invention, but these modifications and changes based on the inventive concept are still within the scope of the appended claims.
Claims (5)
1. The lens pouring device is characterized by comprising an FPGA module, a lens die, a backlight source, a control valve, a pouring head, a transverse piece and a camera; wherein the transverse sheet is closely attached to the lens mold, and the contact part of the transverse sheet and the lens mold is positioned at the uppermost part of the lens mold; the backlight source is arranged at one side close to the pouring head, and the camera is arranged at one side close to the transverse sheet; the pouring head is closely attached to the lens mold, the pouring head is connected with a hose, and the control valve is arranged on the hose; the FPGA module is respectively connected with the control valve and the camera in a communication way; the FPGA module is arranged on the camera, the camera is an image sensor controlled by the FPGA, the FPGA module recognizes images acquired by the camera arranged in the axial direction, the edge of the transverse sheet, which is clung to the lens mould, is in a grid shape, and the transverse sheet is in a triangular prism shape; the transverse film is pressed on the film, and the film is pressed on the left die and the right die; the transverse piece keeps a set angle with the vertical direction; the control valve comprises a cam, the plane of the rotation direction of the cam is parallel to the flow direction of the liquid in the hose, and the rotation of the cam controls the circulation and blocking of the liquid in the hose.
2. The lens pouring device for accurately detecting and controlling liquid level according to claim 1, wherein the lens mold is disc-shaped, the central axis direction of the lens mold is taken as a main axis direction, and the radial direction is taken as a side axis direction; the lens mold comprises a left mold, a right mold and a film, wherein the left mold and the right mold are symmetrically arranged, a set distance is arranged between the left mold and the right mold at intervals, the film is arranged between the left mold and the right mold for sealing edges, and the film is arranged on the side surfaces of the left mold and the right mold; the film is provided with an injection port when edge sealing is carried out; the left die and the right die are round sheet-shaped, and are made of transparent materials.
3. The lens pouring device for accurately detecting and controlling liquid level according to claim 2, wherein the pouring head is arranged at the pouring opening positions of the side surfaces of the left die and the right die; the pouring head is vertically opposite to the pouring inlet; one end of the pouring head, which is far away from the lens mould, is connected with a hose which is used for guiding liquid.
4. A lens pouring device for accurate detection and control of liquid level according to claim 3 wherein the control valve comprises a steering engine, a cam and a fixing member, wherein the fixing member comprises a U-shaped groove through which the hose passes; the cam is arranged at the output end of the steering engine, and can rotate along with the rotation of the output end of the steering engine; the cam is positioned in the U-shaped groove of the fixing piece.
5. The lens pouring device for accurately detecting and controlling liquid level according to claim 2, wherein the backlight source and the camera are arranged in the side shaft direction of the lens mold; the backlight is arranged on one side close to the transverse sheet, and the camera is arranged on one side close to the pouring head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210732403.XA CN115256743B (en) | 2021-02-04 | 2021-02-04 | Lens pouring device capable of accurately detecting and controlling liquid level |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110159386.0A CN113021801B (en) | 2021-02-04 | 2021-02-04 | Lens pouring liquid level control device and method based on FPGA visual detection |
| CN202210732403.XA CN115256743B (en) | 2021-02-04 | 2021-02-04 | Lens pouring device capable of accurately detecting and controlling liquid level |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110159386.0A Division CN113021801B (en) | 2021-02-04 | 2021-02-04 | Lens pouring liquid level control device and method based on FPGA visual detection |
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| Publication Number | Publication Date |
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| CN115256743A CN115256743A (en) | 2022-11-01 |
| CN115256743B true CN115256743B (en) | 2023-12-08 |
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| CN115256743A (en) | 2022-11-01 |
| CN113021801B (en) | 2022-08-05 |
| CN115157506B (en) | 2023-11-28 |
| CN113021801A (en) | 2021-06-25 |
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