Efficient 3D camber surface marking manufacturing method

Abstract

The present application provides a kind of high-efficiency 3D camber surface identification production method, steps are as follows: the shape, size, identification position, identification content of the object to be identified are input to main control unit;Image recognition system is photographed and identified to the object to be identified, finds the identification position needed according to the information stored in main control unit;Automatic ranging system automatically measures the distance of each point on identification position, calculates the shape and radian of camber according to the distance difference;According to the distance measured by automatic ranging system, the focus position of identification source focal point at different identification position is calculated by automatic focusing system;Main control unit controls multi-axis motor servo system to move and rotate to the focus position of identification source focal point according to the identification position and identification content received, and etches identification content to the object to be identified.The present application realizes the automation of identification production, greatly improves the production efficiency by dozens of times, reduces production working hours and reduces labor cost;Directly engraved on product body, no need to store.

Description

Technical Field

[0001] This invention relates to the field of optical communication technology, and in particular to an efficient method for manufacturing 3D curved surface markings, which can be applied to imprinting specific markings on non-planar, 3D curved surfaces. Background Technology

[0002] There are many methods for marking on the outer packaging and the product itself, which can be divided into contact and non-contact marking. Contact marking includes handwriting, stamping, embossing, printing, and labeling; non-contact marking includes inkjet printing and laser marking.

[0003] Contact label printing does not involve printing directly onto the product, but rather using a printer to print on the label. The printing is clear, but when there are many types of labels, inventory management becomes complicated. In addition, wrapping and sticking the printed labels onto the product can lead to the problem of them falling off.

[0004] Non-contact inkjet printing does not touch the product; it prints by spraying ink and can be used on curved or soft surfaces, as well as during high-speed movement. In addition, the printed content can be easily changed.

[0005] Non-contact labeling achieves the purpose of imprinting by means of a physical and chemical reaction between the labeling source and the material being labeled, without the need for replenishing ink or storing labels; in addition, this type of label is applied to the product itself and the label never fades.

[0006] Compared to printing on flat surfaces, printing on non-flat, large-radius 3D curved surfaces is more difficult, and when there are many types of markings, inventory management becomes complicated, making contact printing inefficient.

[0007] Optical communication products such as arrayed waveguide gratings (AWG), variable optical attenuators (VOA), and variable power wavelength division multiplexers (VUMX) have numerous output channels, such as commonly 48, 60, and 96 channels. Each channel has a different identifier, and these identifiers need to be applied near the end of the fiber optic connector for each channel. Taking the commonly used LC connector in optical channel products as an example, the structure of the LC connector is as follows... Figure 1 As shown, the frontmost square flat area extends into the adapter during use. If the marking is located in this area, the marking will not be visible during actual use. Therefore, the marking area can only be on the tail sleeve part M of the LC connector, where the fiber optic cable K is connected. The thicker arc-shaped area of ​​the connector tail sleeve has an outer radius of 2.3mm, making it suitable for marking. The thinner arc-shaped area at the base of the connector tail sleeve has an outer radius of only 1.15mm. This area is too thin and has a larger arc, making marking more difficult, and the markings are too small and difficult to identify, thus it is not suitable for marking.

[0008] The existing 3D curved surface marking method is only applicable to non-planar surface with small arc and large size. For marking the products such as arrayed waveguide grating (AWG), variable optical attenuator (VOA) and variable optical power multiplexer (VUMX), the clear and distinguishable large font marking needs to be marked on the 3D non-planar surface with small size and large arc. The existing marking manufacturing scheme has only two schemes: scheme one, as shown in the drawing, first printing or spraying the marking on the sleeve L, and then wearing the sleeve L with the marking on the optical fiber at the tail of the connector; scheme two, as shown in the drawing, first printing the marking on the label with back glue, and then pasting and winding the label with the marking on the sleeve L. Both the scheme one and the scheme two are printing or spraying the marking on the third party material, and then fixing or wearing the third party material with the marking on the connector or the optical fiber connected with the connector. In this way, the third party marking made in advance is fixed on the connector or the optical fiber of the AWG, VOA, VUMX and other products one by one, which is low in efficiency; meanwhile, a large number of different markings need a large amount of inventory. Figure 2 Figure 3 SUMMARY

[0009] In view of the technical problems of low efficiency and large inventory of the existing marking manufacturing method, the application provides a high-efficiency 3D curved surface marking manufacturing method, which can manufacture the marking on the 3D non-planar surface with large arc and small size, improves the production efficiency and does not need inventory.

[0010] In order to achieve the above-mentioned purpose, the technical scheme of the application is as follows: a high-efficiency 3D curved surface marking manufacturing method, the steps of which are as follows:

[0011] Step one: inputting the shape, size, marking position and marking content of the object to be marked into the master control unit;

[0012] Step two: photographing and identifying the object to be marked by the image recognition system, and finding the required marking position according to the information stored in the master control unit;

[0013] Step three: automatically measuring the distance of each point at the marking position by the automatic distance measuring system, and calculating the shape and arc of the curved surface according to the different distances;

[0014] Step four: calculating the position of the marking source focal point at different marking positions by the automatic focusing system according to the distance measured by the automatic distance measuring system;

[0015] Step five: controlling the multi-axis motor servo system to move and rotate the marking head to the focal length position of the marking source focal point by the master control unit according to the received marking position and marking content, and etching the marking content to the object to be marked.

[0016] ​​Preferably, the main control unit is connected with an auto-focusing system, an auto-ranging system, an image recognition system and a multi-axis motor servo system respectively, the multi-axis motor servo system is connected with the marking head, and the marking head is used for printing the mark on the marked object.

[0017] Preferably, the information recognized by the image recognition system, the information measured by the auto-ranging system and the information calculated by the auto-focusing system are all sent to the main control unit; the main control unit sends a control instruction to the multi-axis motor servo system according to the received information, and the multi-axis motor servo system drives the marking head to move and rotate, so as to realize the etching of the mark.

[0018] Preferably, the image recognition system comprises a CCD camera, an image recognition card and a graphic processing system, the CCD camera is connected with the graphic processing system, and the graphic processing system is connected with the image recognition card.

[0019] When the marking starts, the image recognition system takes a photo of the marked object, the graphic processing system pre-processes the photo, the image recognition card recognizes the pre-processed photo and sends the recognition information to the main control unit, the main control unit compares the recognition information with the information of the marked object stored in advance, and finds the mark content of the marked object and the starting position of the mark content.

[0020] Preferably, the CCD in the auto-ranging system images point by point, when the image point is not clear, the stepping motor drives the electric fine adjustment frame to move to make the lens of the CCD ascend or descend, the height distance information of each point is calculated according to the ascending or descending distance, and the curvature of the curved surface is calculated according to the height difference of each point on the curved surface.

[0021] Preferably, relative to the unified horizontal reference point, the 3D curved surface is drawn by the 3D function software built in the main control unit A according to the height difference of each point on the curved surface, and the curvature is calculated.

[0022] Preferably, the position to which the focus point of the mark source should move is calculated according to the height of different positions on the curved surface of the marked object measured by the auto-ranging system, the mark source is driven by the stepping motor to move to the focus distance position measured by the auto-ranging system, and the clear mark content is etched.

[0023] Preferably, the multi-axis motor servo system comprises a motor-driven multi-axis precise fine adjustment frame, the fine adjustment frame is driven by the stepping motor to move, and the main control unit controls the start and stop of the stepping motor; the multi-axis motor servo system drives the marking head to move and rotate, so that the focus point of the mark source is always focused on each mark point on the marked object, and the clear, large-curvature and small-size 3D curved surface mark is realized.

[0024] Preferably, the identified object is applied to the product of the multi-output channel of the optical communication array waveguide grating, variable optical attenuator and optical power adjustable wavelength division multiplexer.

[0025] Preferably, the body of the identified object is a fiber sleeve, a tail sleeve part or a main body part of a fiber connector; the printing head includes but is not limited to laser etching, inkjet printing or pad printing.

[0026] Compared with the prior art, the present application has the following advantages: automation of identification production is realized, production efficiency is improved by dozens of times, production time is reduced, and labor cost is reduced; the printing is directly on the product body without the need for inventory; the printing is beautiful, clear, never fading and never falling off. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 is a structural schematic diagram of an LC connector with a fiber.

[0029] Figure 2 is an actual identification (printed or inkjet printed sleeve identification) made by using the existing production scheme one.

[0030] Figure 3 is an actual identification (pasted and wrapped label) made by using the existing production scheme two;

[0031] Figure 4 is a principle diagram used in the efficient 3D curved surface identification production method proposed by the present application.

[0032] Figure 5 is a structural schematic diagram of the identification production area of the tail sleeve curved surface part of the LC connector according to the present application.

[0033] Figure 6 is an actual identification (etched identification) made by using the present application.

[0034] Among them, A—main control unit; B—automatic focusing system; C—automatic ranging system; D—image recognition system; E—multi-axis motor servo system; F—printing head; G—identified object; N—main body part of LC connector; M—tail sleeve part of LC connector; K—fiber; L—sleeve identification; H—identification area on the tail sleeve. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0036] As shown in the figure, a high-efficiency 3D curved surface marking manufacturing method has the following steps: Figure 1

[0037] Step one: the shape, size, marking position, marking content and other information of the marked object G are input into the main control unit A.

[0038] As shown in the figure, the full-automatic manufacturing system used by the present application includes the main control unit A, the automatic focusing system B, the automatic ranging system C, the image recognition system D, the multi-axis motor servo system E and the marking head F. The main control unit A is connected with the automatic focusing system B, the automatic ranging system C, the image recognition system D and the multi-axis motor servo system E respectively. The multi-axis motor servo system E is connected with the marking head F. The marking head F is used for printing the marking on the marked object G. The information recognized by the image recognition system D, the information measured by the automatic ranging system C and the information calculated by the automatic focusing system B are all sent to the main control unit A. The main control unit A sends instructions to control the multi-axis motor servo system E according to the received information. The multi-axis motor servo system E drives the marking head F to move and rotate, so as to realize the etching of the marking. Figure 4 The application of the present application is the LC connector. The shape and size refer to the actual conical shape of the LC connector and the specific size of each component. The user needs to etch the marking content M-D and COM in the M part of the LC connector.

[0039] The above information is all input into the single-chip microcomputer in the main control unit A in advance. Figure 5

[0040] Step two: the image recognition system D takes pictures and recognizes the marked object G, and finds the marking position according to the information stored in the main control unit A.

[0041] The image and coordinates of the marked object G are known and written into the main control unit A. The image recognition system D includes a CCD camera, an image recognition card and a graphic processing system. The CCD camera is connected with the image recognition card. The image recognition card is connected with the graphic processing system.

[0042] ​​When the marking starts, the image recognition system D takes a picture of the object G to be marked and compares it with the image of the object G to be marked stored in the main control unit A in advance, such as the shape, size, and marking position of the LC connector, and the information is written into the single-chip microcomputer in the main control unit A, and the information is automatically compared with the measured shape and size of the object to be marked to determine whether they are consistent. The program software in the main control unit A automatically realizes the comparison. When the marking information, i.e. the starting position of the marking content, is found, i.e. the starting position specified in the main control unit A, the etching of the marking content is started according to the required marking content.

[0043] Step three: The automatic distance measuring system C automatically measures the distance of each point at the marking position, and calculates the shape and curvature of the arc surface according to the different distances.

[0044] The CCD in the automatic distance measuring system C images point by point, and the clarity of the image point is related to the focal length. When the image point is not clear, the stepping motor drives the electric fine adjustment frame to move up or down, and according to the distance of the up or down movement, the height distance information of each point can be calculated. The number of steps of the stepping motor is controlled by the program software, and the distance moved by each step can be calculated by multiplying the number of steps by the distance moved by each step. According to the height difference of each point on the arc surface, the curvature of the bending arc can be calculated, which is automatically realized by the program. With respect to a unified horizontal reference point, the 3D arc surface can be drawn and the curvature can be calculated by the built-in 3D function software in the main control unit A according to the height difference of each point on the arc surface. When etching the marking content later, the position of the focal point source needs to be adjusted according to the height difference of each point on the arc surface, otherwise the etched marking content will not be clear.

[0045] Step four: According to the distance measured by the automatic distance measuring system C, the automatic focusing system B calculates the position of the focal point of the marking source at different marking positions, and the next step will be etching the marking content.

[0046] After the height positions of each point on the arc surface are determined, the marking source is moved to the focal point distance position measured by the automatic distance measuring system C (achieved according to the height difference of each point on the arc surface) under the drive of the stepping motor, so as to realize the etching of clear marking content. According to the height of the object to be marked at different positions on the arc surface measured by the automatic distance measuring system C, the position to which the focal point of the marking source should move is calculated (achieved according to the height difference of each point on the arc surface). The focal length is different at different positions on the arc surface, and the focal point of the marking source needs to move to the position of the focusing height. After the focal point source moves to the focal length position, the etching starts.

[0047] Step five: The main control unit A sends a command to control the multi-axis motor servo system E to move and rotate the marking head F to the focal length position of the focal point of the marking source in step four according to the received information, i.e. the starting position of the marking and the marking content, and etches the marking content to the object G to be marked.

[0048] Multi-axis motor servo system E is a motor-driven multi-axis precision fine adjustment frame, which is driven by a stepping motor to generate movement, and the stepping motor is electrically driven, and the main control unit A controls the start and stop of the stepping motor. Multi-axis motor servo system E drives the marking head F to move and rotate, so that the focal point of the identification source (achieved according to the height difference of each point on the curved surface) is always focused on each identification point on the identified object G (achieved according to the height difference of each point on the curved surface), so as to realize clear, large arc, small size 3D curved surface identification.

[0049] The identification is directly made on the curved surface body of the identified object G, and is applied to products with multiple output channels such as arrayed waveguide grating (AWG), variable optical attenuator (VOA), and variable optical power multiplexer (VUMX). The application scene of the extended patent can be applied to different specific products.

[0050] The body of the identified object G is the tail sleeve part or the main body part of the fiber connector, including but not limited to LC, SC, FC, ST, MU, MT, etc.; the identified body can also be a fiber sleeve.

[0051] The marking head F includes but is not limited to laser etching, code spraying, pad printing, etc., and the application scene of the extended patent can be different identification sources.

[0052] The present application only takes LC connector AWG, VOA, VUMX and other products as an example, but the present application can also be used for other various connectors and other various products.

[0053] The existing product identification of LC connector AWG, VOA, VUMX, etc. adopts the sleeve identification and the winding label identification as shown in Figure 2 、 Figure 3 The two kinds of identification are made on the third party material in advance, and a large amount of inventory is needed; then the prepared identification is put on the fiber K or wound on the tail sleeve M of the connector, and is fixed by heat shrinkage, or fixed by adhesive, or not fixed. The two identification schemes are to correspond different identifications to different channels, and each identification is manually operated, which takes 30 seconds, and there are dozens or hundreds of identifications for each product, and the total working hours of this part is dozens of minutes. The identification area H of the connector tail sleeve with a radius of 2.3mm has large arc and small size. The existing code spraying, pad printing or laser etching method is only suitable for non-planar surface with small arc and large size.

[0054] Therefore, the present application provides Figure 4The manufacturing method can manufacture the beautiful and clear mark on the 3D arc surface with large arc and small size, directly manufacture on the connecting head sleeve, never fade, and realize the full automatic manufacturing. The image recognition system D is integrated, the marked object G can be placed arbitrarily, does not need clamp and fixing, the image recognition system D automatically finds the mark position, thereby further simplifying the operation. The manufacturing method is full automatic operation, time consumption is 1 second, and the production efficiency is improved by 30 times.

[0055] Figure 6 The mark effect manufactured by the scheme of the present application is clear, beautiful and generous.

[0056] Therefore, the focal point of the mark source can always focus on each mark point on the marked object G by automatically measuring the arc surface shape and the arc through the third step, so that the marked mark content is clear. The present application can realize the clear marking on the 3D arc surface with large arc and small size, and directly mark on the marked object G body, thereby realizing the full automatic marking of the mark.

[0057] The above only describes the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency 3D curved surface logo manufacturing method, characterized in that, The steps are as follows: Step one: the shape, size, identification position, and identification content of the identified object are input into the main control unit; Step two: the image recognition system takes a picture of the identified object and identifies it, and finds the required identification position according to the information stored in the main control unit; Step three: the automatic distance measuring system automatically measures the distance of each point on the identification position, and calculates the shape and radian of the arc surface according to the different distances; Step four: the automatic focusing system calculates the position of the identification source focal point at different identification positions according to the distance measured by the automatic distance measuring system; Step five: the main control unit controls the multi-axis motor servo system to move and rotate the marking head to the focal length position of the identification source focal point according to the received identification position and identification content, and etches the identification content onto the identified object. The image recognition system includes a CCD camera, an image recognition card, and a graphics processing system, the CCD camera is connected to the graphics processing system, and the graphics processing system is connected to the image recognition. When starting to mark, the image recognition system takes a picture of the identified object, the graphics processing system pre-processes the picture, the image recognition card identifies the pre-processed picture and sends the identification information to the main control unit, and the main control unit compares the identification information with the information of the identified object stored in advance to find the identification content and the starting position of the identification content.

2. The efficient 3D curved surface sign manufacturing method according to claim 1, characterized in that, The main control unit is connected to the automatic focusing system, the automatic distance measuring system, the image recognition system, and the multi-axis motor servo system, the multi-axis motor servo system is connected to the marking head, and the marking head is used to print the identification on the identified object.

3. The method of claim 2, wherein the method further comprises: The information identified by the image recognition system, the information measured by the automatic distance measuring system, and the information calculated by the automatic focusing system are all sent to the main control unit, the main control unit sends instructions to control the multi-axis motor servo system according to the received information, and the multi-axis motor servo system drives the marking head to move and rotate, thereby realizing the etching of the identification.

4. The method according to any one of claims 1-3, wherein, The CCD in the automatic distance measuring system images point by point, when the image point is not clear, the stepping motor drives the electric fine adjustment frame to move up or down, calculates the height distance information of each point according to the rising or falling distance, and calculates the curvature of the curved surface according to the height difference of each point on the curved surface.

5. The method of claim 4, wherein the method further comprises: With respect to a unified horizontal reference point, the main control unit A built-in 3D function software draws a 3D curved surface and calculates the radian according to the height difference of each point on the curved surface.

6. The method of claim 4, wherein the method further comprises: According to the height of different positions on the curved surface of the identified object measured by the automatic distance measuring system, the position to which the identification source focal point should move is calculated, the identification source is moved to the focal point distance position measured by the automatic distance measuring system under the driving of the stepping motor, and clear identification content is etched.

7. The method of claim 4, wherein the method further comprises: The multi-axis motor servo system includes a motor-driven multi-axis precision fine adjustment frame, the fine adjustment frame is driven by the stepping motor to move, and the main control unit controls the start and stop of the stepping motor; the multi-axis motor servo system drives the marking head to move and rotate, so that the focal point of the identification source is always focused on each identification point on the identified object, and clear, large-radian, and small-size 3D curved surface identification is realized.

8. The method of claim 4, wherein the method further comprises: The identified object is applied to the product of the multi-output channel of the optical communication array waveguide grating, variable optical attenuator and optical power adjustable wavelength division multiplexer.

9. The method of claim 4, wherein the method further comprises: The body of the identified object is a fiber sleeve, a tail sleeve part or a main body part of a fiber connector; the printing head includes but is not limited to laser etching, inkjet printing or pad printing.

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