Code disc structure, code disc structure manufacturing method and encoder
By forming a protective layer made of nanomaterial on the surface of the code disk substrate, the encoder is solved by solving the problem of oil stains and powder chips, improving the anti-fouling ability and signal stability, enhancing the reliability of the encoder and reducing maintenance costs.
Patent Information
- Application Number
- CN202411928818.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-05-02
AI Technical Summary
The minimum tile interval of the encoder's code disk reaches the micron level, resulting in abnormal sensitivity to oil stains and powder chips, and it is easy to cause abnormal signal of foreign objects, causing the encoder to fail.
A protective layer is formed on the surface of the code disk substrate. The protective layer is a nanolayer, made of materials such as silica, alumina, nanosilver and fluoride. Nanoprotrusions are distributed on the surface to form a hydrophobic surface.
The anti-fouling capability of the code disk structure is improved, the risk of contamination by foreign matter such as oil and powder is reduced, the stability of the encoder signal is ensured, the possibility of encoder failure is reduced, the reliability of the encoder and the maintenance cost is reduced.
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Figure CN119915321A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of encoders, and in particular to a code disc structure, a method for manufacturing the code disc structure, and an encoder. Background Art
[0002] In encoder related technologies, for example, the photoelectric encoder is an angle measuring device that integrates optics, mechanics, and electronics. It converts optical signals into electrical signals through mechanical structures and signal processing circuits, thereby achieving direct or indirect measurement of various physical quantities such as angular displacement, position, and speed. Figure 1 As shown in the figure, the base material of the code disc is generally optical glass, and the coating of the code disc is generally metal chromium, such as Figure 2 As shown in the figure, the substrate and the coating form light and dark stripes, which in turn form a specific coded photoelectric signal, and output the absolute position through calculation. In order to improve the accuracy of the encoder, the minimum interval between the lines of the code disk reaches the micron level, so it is extremely sensitive to oil and dust, and it is easy to cause signal abnormalities due to the above foreign matter, causing the encoder to fail. Summary of the invention
[0003] The technical problem to be solved by the present invention is that in order to improve the accuracy of the encoder, the minimum line spacing of the code disk reaches the micron level. Therefore, it is extremely sensitive to oil and dust, and it is easy for the above foreign matter to cause signal abnormalities and cause encoder failure. For this purpose, a code disk structure, a method for manufacturing a code disk structure and an encoder are proposed.
[0004] The present invention provides a code disc structure, comprising a code disc body and a protective layer, wherein:
[0005] The code disc body comprises a code disc substrate and a line plating layer, wherein the code disc substrate has a top surface and a bottom surface opposite to each other in a height direction, and the line plating layer is formed on the top surface;
[0006] The protective layer is formed on the upper and lower surfaces of the code disc body, the upper surface of the code disc body includes the surface of the top surface not covered by the engraved line coating and the surface of the engraved line coating, and the lower surface of the code disc body includes the bottom surface of the code disc substrate.
[0007] In some embodiments, the protective layer is a nanolayer, and the protective layer is transparent.
[0008] In some embodiments, the protective layer is made of one of silicon dioxide, aluminum oxide, nanosilver and fluoride.
[0009] In some embodiments, the thickness of the protective layer is 10 to 100 nanometers; and the surface of the protective layer is a hydrophobic surface with distributed nano-protrusions.
[0010] In some embodiments, the nano-protrusion has a height of h and a width of d;
[0011] Among them, d is 100 to 200 nanometers, and h is 10 to 50 nanometers.
[0012] In some embodiments, the method for preparing the protective layer comprises:
[0013] Evenly dispersing the nanomaterials into a solvent to prepare a nano solution;
[0014] The code disc body is coated with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating.
[0015] In some embodiments, the solvent is one of ethanol, isopropanol, or deionized water;
[0016] The concentration of the nano material in the solvent is 2% to 5%.
[0017] In some embodiments, the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0018] Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body;
[0019] Wherein, the spraying pressure of the sprayer is 0.3MPa-0.5MPa, the spraying flow rate is 150mL / min-250mL / min, and the spraying distance is 15cm-25cm.
[0020] In some embodiments, the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0021] The code disc body is placed in a container having the nano solution, immersed for 10s to 60s, and the code disc body is taken out of the nano solution at a constant speed.
[0022] In some embodiments, the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0023] Adding the nano-solution dropwise to the rotating code disc body, so that the nano-material in the added nano-solution is evenly distributed on the code disc body;
[0024] The rotation speed of the code disc body is 2000 rpm to 5000 rpm, the rotation time is 20 s to 30 s, and the drop amount of the nano solution is 0.2 mL to 0.5 mL.
[0025] In some embodiments, the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0026] Depositing the nanomaterial in the nano solution on the code disc body by physical vapor deposition;
[0027] The physical vapor deposition adopts argon as the sputtering gas, the sputtering power is 100W to 300W, the substrate bias voltage is -50 to -200V, and the vacuum degree is 10 -6 ~10 -4 Torr, deposition time: 20min~60min, the bias voltage of the code disc body is -50V~200V.
[0028] In some embodiments, before the step of coating the code disc body with the nano solution so that the nano material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pretreated, and the pretreatment includes:
[0029] Cleaning the upper and lower surfaces of the code disc body using an organic solvent;
[0030] Putting the cleaned code disc body into an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body;
[0031] The oven temperature is 80° C. to 120° C., and the drying time is 10 min to 30 min.
[0032] In some embodiments, after the step of coating the code disc body with the nano solution so that the nano material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes:
[0033] Putting the code disc body into an oven for drying to solidify the protective layer;
[0034] Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
[0035] In some embodiments, a method for manufacturing a code disc structure is provided, wherein the code disc structure is the above-mentioned code disc structure, and the method comprises:
[0036] Evenly dispersing the nanomaterials into a solvent to prepare a nano solution;
[0037] The code disc body is coated with the nano-solution so that the nano-material is attached to the upper and lower surfaces of the code disc body in the form of a coating, thereby forming the protective layer on the upper and lower surfaces of the code disc body.
[0038] In some embodiments, the code disc body is coated with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, including:
[0039] Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body;
[0040] Or, the code disc body is placed in a container having the nano solution for immersion, and the code disc body is taken out of the nano solution at a constant speed;
[0041] Or, the nano-solution is dripped onto the rotating code disc body, so that the dripped nano-solution is evenly distributed on the code disc body;
[0042] Alternatively, the nanomaterial in the nano solution is deposited on the code disc body by physical vapor deposition.
[0043] In some embodiments, before the step of coating the code disc body with the nano solution so that the nano material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pretreated, and the pretreatment includes:
[0044] Use an organic solvent to clean the upper and lower surfaces of the code disc body.
[0045] The cleaned code disc body is placed in an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body.
[0046] The oven temperature is 80°C to 120°C, and the drying time is 10min to 30min;
[0047] After the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes:
[0048] The code disc body is placed in an oven for drying to solidify the protective layer.
[0049] Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
[0050] In some embodiments, an encoder is provided, comprising a structure, an LED, a photosensitive unit, and a signal processing unit, wherein the encoder further comprises:
[0051] The above-mentioned code disk structure.
[0052] The solution provided by the present invention has the following beneficial effects compared with the prior art:
[0053] By setting a protective layer on the surface of the code disc substrate, the anti-fouling ability of the code disc structure can be improved, and the risk of the code disc structure being contaminated by foreign matter such as oil and powder can be greatly reduced, thereby ensuring the stability of the encoder signal and reducing the possibility of encoder failure due to signal abnormalities, thereby improving the reliability of the encoder during application and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0054] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:
[0055] Figure 1 It is one of the structural schematic diagrams of the prior art code disk structure;
[0056] Figure 2 This is the second structural diagram of the prior art code disk structure;
[0057] Figure 3 It is one of the structural schematic diagrams of the code disk structure shown in the embodiment of the present invention;
[0058] Figure 4 yes Figure 3 A partial enlarged view of the code disc structure at position A shown in the embodiment of the present invention;
[0059] Figure 5 This is the second structural schematic diagram of the code disk structure shown in the embodiment of the present invention;
[0060] Figure 6 yes Figure 5 A partial enlarged view of the code disc structure at position B shown in the embodiment of the present invention;
[0061] Figure 7 is a schematic diagram of nano-protrusions on a protective layer shown in an embodiment of the present invention;
[0062] Figure 8 This is one of the flow charts of the method for preparing the protective layer shown in the embodiment of the present invention;
[0063] Fig. 9 It is a flow chart of pre-processing the upper surface and the lower surface of the code disk body according to an embodiment of the present invention.
[0064] In the figure: 1-code disc substrate, 101-top surface, 102-bottom surface, 2-line coating, 3-protective layer, 4-nano protrusions.
[0065] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0066] In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0067] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "contacted", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0068] In order to improve the accuracy of the encoder, the minimum line spacing of the code disk reaches the micron level. Therefore, it is extremely sensitive to oil, dirt and powder. It is easy for the above foreign objects to cause signal abnormalities and cause encoder failure.
[0069] Based on this, the following embodiments are proposed.
[0070] Embodiment 1
[0071] like Figure 3-6 As shown, this embodiment provides a code disc structure, including a code disc body and a protective layer 3, wherein:
[0072] The code disc body comprises a code disc substrate 1 and a line plating layer 2, wherein the code disc substrate 1 has a top surface 101 and a bottom surface 102 opposite to each other in the height direction, and the line plating layer 2 is formed on the top surface 101;
[0073] The protective layer 3 is formed on the upper and lower surfaces of the code disc body. The upper surface of the code disc body includes the surface of the top surface 101 not covered by the engraved coating 2 and the surface of the engraved coating 2. The lower surface of the code disc body includes the bottom surface 102 of the code disc substrate 1.
[0074] In this embodiment, the code disc structure includes a code disc body and a protective layer 3. The code disc substrate 1 is usually made of optical glass or resin and has good optical properties. A line plating layer 2 is formed on the code disc substrate 1. The line plating layer 2 is generally made of metal materials such as chromium, nickel, and aluminum, and is arranged on the top surface 101 of the code disc substrate 1 by plating and engraving, and light and dark stripes are formed according to the coding design, wherein the light stripes are the surface of the code disc substrate 1 not covered by the line plating layer 2, and the dark stripes are the line plating layer 2 covering the surface of the code disc substrate 1. A side surface of the code disc substrate 1 having the engraved coating 2 is defined as a top surface 101, and a side surface opposite to the top surface 101 in the height direction of the code disc substrate 1 is defined as a bottom surface 102. The protective layer 3 is formed on the upper and lower surfaces of the code disc body. The upper surface of the code disc body includes the surface of the top surface 101 that is not covered by the engraved coating 2 and the surface of the engraved coating 2. The lower surface of the code disc body includes the bottom surface 102 of the code disc substrate 1. The protective layer 3 is used to isolate foreign matter from the upper and lower surfaces of the code disc body to prevent the upper and lower surfaces of the code disc body from being contaminated by foreign matter such as oil stains and powder.
[0075] Preferably, the protective layer 3 may be an organic coating, and the code wheel substrate 1 may be chemically strengthened glass.
[0076] By providing a protective layer 3 on the surface of the code disc substrate 1, the anti-fouling ability of the code disc structure can be improved, and the risk of the code disc structure being contaminated by foreign matter such as oil and powder can be greatly reduced, thereby ensuring the stability of the encoder signal and reducing the possibility of encoder failure due to signal abnormalities, thereby improving the reliability of the encoder during application and reducing maintenance costs.
[0077] Optionally, in an implementation of this embodiment, as Figure 3-6 As shown,
[0078] The protective layer 3 is a nano layer and is transparent.
[0079] In this embodiment, the protective layer 3 is an ultra-thin protective layer made of nanometer materials and having a thickness of only a few nanometers to a few hundred nanometers. The transparent protective layer 3 will not affect the optical properties of the code disk substrate 1 .
[0080] Optionally, in an implementation of this embodiment,
[0081] The protective layer 3 is made of one of silicon dioxide, aluminum oxide, nano silver and fluoride.
[0082] In this embodiment, the protective layer 3 is made of one of silicon dioxide, aluminum oxide, nano silver and fluoride. Since nano materials such as silicon dioxide, aluminum oxide, nano silver and fluoride have good transparency, the protective layer 3 can be transparent, thereby ensuring the optical performance of the code disc substrate 1.
[0083] Optionally, in an implementation of this embodiment, as Figure 4 As shown,
[0084] The thickness of the protective layer 3 is 10 to 100 nanometers.
[0085] The surface of the protective layer 3 is a hydrophobic surface with nano-protrusions 4 distributed thereon.
[0086] In this embodiment, a plurality of protrusions are formed on the surface of the protective layer 3. The plurality of protrusions make the surface of the protective layer 3 uneven under the microstructure, so that foreign matter such as oil, dust and debris will roll down under the action of gravity after contacting the protrusions.
[0087] By forming a plurality of protrusions on the surface of the protection layer 3, foreign matter can be prevented from being retained on the surface of the protection layer 3, thereby improving the anti-fouling ability of the code disk structure.
[0088] Optionally, in an implementation of this embodiment, as Figure 7 As shown,
[0089] The height of the nano protrusion 4 is h, and the width is d;
[0090] Among them, d is 100 to 200 nanometers, and h is 10 to 50 nanometers.
[0091] In this embodiment, the protective layer 3 is composed of nano materials, so it can form nano-level protrusions. The microstructure of the surface of the protective layer 3 is similar to the surface of a lotus leaf. The size of the nano-protrusions 4 is maintained between 100 and 200 nanometers and 10 and 50 nanometers, so that the surface of the protective layer 3 can form a lotus leaf effect.
[0092] Specifically, the lotus effect refers to the formation of spheres by water droplets on the surface of lotus leaves, which absorb dust during the rolling process and then roll off the leaf surface, thereby achieving the effect of cleaning the leaf surface. The occurrence of this self-cleaning phenomenon is mainly attributed to the special structure of the lotus leaf surface. The lotus leaf surface is evenly distributed with papillary structures, and these raised surfaces are covered with a layer of biological wax. On top of these micron-sized papillae, there are also a large number of nano-sized particle structures. The synergistic effect between the papillae of this micron and nano-composite structure and the surface hydrophobic wax makes the lotus leaf surface have a large contact angle and a small rolling angle for water, forming a superhydrophobic surface.
[0093] The size of the nano-protrusions 4 is maintained between 100 and 200 nanometers and 10 and 50 nanometers, so that a lotus effect is formed on the surface of the protective layer 3, which can facilitate the fall of foreign matter from the surface of the protective layer 3, thereby enabling the protective layer 3 to effectively reduce the residue of oil, dust and fingerprints on the surface of the code disk structure.
[0094] Optionally, in an implementation of this embodiment, as Figure 8 As shown,
[0095] The preparation method of the protective layer 3 comprises:
[0096] Evenly dispersing the nanomaterials into a solvent to prepare a nano solution;
[0097] The code disc body is coated with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating.
[0098] In this embodiment, the preparation method of the protective layer 3 includes: first, the nanomaterial is evenly dispersed in the solvent to form a nano solution. During the configuration process, ultrasound or other physical methods can be used to ensure that the nanomaterial is evenly dispersed. Secondly, the nano solution is attached to the upper and lower surfaces of the code disc body in the form of a coating, so that after the nanomaterial is solidified, a stable coating is formed on the upper and lower surfaces of the code disc body.
[0099] Optionally, in an implementation of this embodiment,
[0100] The solvent was one of ethanol, isopropanol or deionized water.
[0101] The concentration of nanomaterials in the solvent is 2% to 5%.
[0102] In this embodiment, the solvent used to prepare the nano-solution can be ethanol, isopropanol or deionized water, so that the solvent has the characteristics of good solubility, high purity and low toxicity. The concentration of the nano-material in the solvent is set to 2% to 5% so that the upper and lower surfaces of the code disc body have sufficient hydrophobicity and self-cleaning properties.
[0103] Optionally, in an implementation of this embodiment,
[0104] The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0105] Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body;
[0106] Wherein, the spraying pressure of the sprayer is 0.3MPa-0.5MPa, the spraying flow rate is 150mL / min-250mL / min, and the spraying distance is 15cm-25cm.
[0107] In this embodiment, a sprayer is used to evenly spray the nano solution on the upper and lower surfaces of the code disc body, so that the nano solution can be attached to the upper and lower surfaces of the code disc body by spraying. The spraying pressure, spraying flow rate and spraying distance of the sprayer are key parameters that affect the quality and uniformity of the coating. Proper configuration of the key parameters can ensure the uniformity and adhesion of the coating, so that the nano solution can evenly adhere to the upper and lower surfaces of the code disc body.
[0108] Optionally, in an implementation of this embodiment,
[0109] The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0110] The code disc body is placed in a container having the nano solution, immersed for 10s to 60s, and the code disc body is taken out of the nano solution at a constant speed.
[0111] In this embodiment, making the nano-solution adhere to the upper and lower surfaces of the code disc body in the form of a coating includes: placing the code disc structure in a container with the nano-solution and soaking it for a certain period of time, and then taking the code disc structure out of the nano-solution at a constant speed, so that the nano-solution can be evenly adhered to the upper and lower surfaces of the code disc body.
[0112] Preferably, the code disc structure is immersed in the nano solution for 10 seconds to 60 seconds, and the code disc structure is taken out of the nano solution at a speed of 5 mm per second.
[0113] Optionally, in an implementation of this embodiment,
[0114] The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0115] Adding the nano-solution dropwise to the rotating code disc body, so that the nano-material in the added nano-solution is evenly distributed on the code disc body;
[0116] The rotation speed of the code disc body is 2000 rpm to 5000 rpm, the rotation time is 20 s to 30 s, and the drop amount of the nano solution is 0.2 mL to 0.5 mL.
[0117] In this embodiment, making the nano solution adhere to the upper and lower surfaces of the code disc body in the form of a coating includes: contacting the nano material in the nano solution with the code disc structure by dripping, and rotating the code disc structure while dripping the nano solution, so that the nano material in the dripped nano solution can be evenly adhered to the upper and lower surfaces of the code disc body.
[0118] Optionally, in an implementation of this embodiment,
[0119] The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0120] Depositing the nanomaterial in the nano solution on the code disc body by physical vapor deposition;
[0121] The physical vapor deposition adopts argon as the sputtering gas, the sputtering power is 100W to 300W, the substrate bias voltage is -50 to -200V, and the vacuum degree is 10 -6 ~10 -4 Torr, deposition time: 20min~60min, the bias voltage of the code disc body is -50V~200V.
[0122] In this embodiment, making the nano solution adhere to the upper and lower surfaces of the code disc body in the form of a coating includes: depositing the nano solution on the code disc structure by physical vapor deposition, so that the nano solution can be evenly adhered to the upper and lower surfaces of the code disc body by physical vapor deposition.
[0123] Optionally, in an implementation of this embodiment, as Fig. 9 As shown,
[0124] Before the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pre-treated, and the pre-treatment includes:
[0125] Cleaning the upper and lower surfaces of the code disc body using an organic solvent;
[0126] Putting the cleaned code disc body into an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body;
[0127] The oven temperature is 80° C. to 120° C., and the drying time is 10 min to 30 min.
[0128] In this embodiment, before the step of attaching the nano solution to the upper and lower surfaces of the code disc body in the form of a coating, the upper and lower surfaces of the code disc body need to be pretreated so that the nano solution can better adhere to the upper and lower surfaces of the code disc body. The pretreatment includes: using an organic solvent to clean the upper and lower surfaces of the code disc body. The organic solvent is generally a liquid compound such as acetone and isopropanol, which can effectively remove oil, dust and other impurities. There will be water marks and solvent residues on the upper and lower surfaces of the code disc body after cleaning. Therefore, the cleaned code disc structure is placed in an oven for drying. The water marks and organic solvents remaining on the upper and lower surfaces of the code disc body can be removed by drying.
[0129] By pre-treating the upper and lower surfaces of the code disc body, oil, dust and other impurities on the surface of the code disc structure can be removed, allowing the nano solution to better adhere to the upper and lower surfaces of the code disc body, thereby improving the preparation efficiency of the protective layer 3.
[0130] Optionally, in an implementation of this embodiment,
[0131] After the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes:
[0132] Put the code disc body into an oven for drying to solidify the protective layer 3;
[0133] Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
[0134] In this embodiment, after the step of making the nano solution adhere to the upper and lower surfaces of the code disc body in the form of a coating, the upper and lower surfaces of the code disc body need to be dried to solidify the nano solution on the upper and lower surfaces of the code disc body to form a stable coating. The drying process includes: placing the code disc structure in an oven for drying so that the nano solution solidifies on the upper and lower surfaces of the code disc body to form a protective layer 3.
[0135] Embodiment 2
[0136] This embodiment provides a method for manufacturing a code disc structure, wherein the code disc structure is the code disc structure in Embodiment 1, and the method comprises:
[0137] Evenly dispersing the nanomaterials into a solvent to prepare a nano solution;
[0138] The code disc body is coated with the nano-solution so that the nano-material is attached to the upper and lower surfaces of the code disc body in the form of a coating, thereby forming the protective layer 3 on the upper and lower surfaces of the code disc body.
[0139] Specifically, the method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises:
[0140] Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body;
[0141] Or, the code disc body is placed in a container having the nano solution for immersion, and the code disc body is taken out of the nano solution at a constant speed;
[0142] Or, the nano-solution is dripped onto the rotating code disc body, so that the dripped nano-solution is evenly distributed on the code disc body;
[0143] Alternatively, the nanomaterial in the nano solution is deposited on the code disc body by physical vapor deposition.
[0144] Before the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pre-treated, and the pre-treatment includes:
[0145] Use an organic solvent to clean the upper and lower surfaces of the code disc body.
[0146] The cleaned code disc body is placed in an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body.
[0147] The oven temperature is 80°C to 120°C, and the drying time is 10min to 30min;
[0148] After the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes:
[0149] The code disc body is placed in an oven for drying to solidify the protective layer 3.
[0150] Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
[0151] In this embodiment, by adopting the manufacturing method of the above-mentioned code disc structure, in the manufactured code disc structure, the protective layer 3 is formed on the upper surface and the lower surface of the code disc body, the upper surface of the code disc body includes the surface on the top surface 101 that is not covered by the engraved coating 2 and the surface of the engraved coating 2, and the lower surface of the code disc body includes the bottom surface 102 of the code disc substrate 1, and the protective layer 3 is used to isolate foreign matter from the upper surface and the lower surface of the code disc body to prevent the upper surface and the lower surface of the code disc body from being contaminated by foreign matter such as oil stains and powder.
[0152] Compared with the code disc without the protective layer 3, the code disc without the protective coating 3 has a water contact angle of about 50° to 60°, which means that water droplets can easily spread on the surface of the code disc, forming a large contact area, which is not conducive to waterproofing. The oil contact angle is about 20° to 30°, which means that oil droplets can easily spread on the surface of the code disc, forming a large contact area, which is not conducive to oil prevention, and the surface free energy is about 40mJ / m2 to 50mJ / m2, which means that the surface of the code disc has a high surface free energy, which is easy to absorb water and oily pollutants, and is not conducive to anti-fouling.
[0153] The code disc structure obtained by adopting the preparation method described in the first embodiment has an ultra-thin nano material protective layer 3 on its upper and lower surfaces.
[0154] The contact angle between the code disk structure and water can be increased to 90° to 150° or more, achieving a super hydrophobic state. The contact angle between the code disk structure and oil can be increased to 90° to 120° or more, achieving a super oleophobic state. The surface free energy can be reduced to 10mJ / m2 to 30mJ / m2.
[0155] Thereby, the waterproof and oil-proof properties of the code disc structure are significantly improved, and the adhesion of pollutants to the surface of the code disc structure is significantly reduced. The protective layer 3 can increase the surface roughness by more than 10 times, significantly improving the waterproof and oil-proof properties, thereby effectively reducing the residue of oil, dust and fingerprints on the surface of the code disc, improving the anti-fouling ability of the code disc structure, and thus ensuring the stability of the encoder signal, improving the reliability of the encoder during application, and reducing maintenance costs.
[0156] Embodiment 3
[0157] This embodiment provides a photoelectric encoder, including a structure, an LED, a photosensitive unit, and a signal processing unit. The photoelectric encoder also includes:
[0158] A code disk structure as in any one of the above-mentioned embodiments.
[0159] In this embodiment, the photoelectric encoder includes a structure, an LED, a photosensitive unit and a signal processing unit, and the photoelectric encoder also includes: a code disk structure as in any one of the above-mentioned embodiments 1. Since the photoelectric encoder includes the code disk structure as in any one of the above-mentioned embodiments 1, the photoelectric encoder has all the beneficial effects of the code disk structure as in any one of the above-mentioned embodiments 1, which will not be described in detail here.
[0160] In summary, the ingenious design of the code disk structure lies in:
[0161] First, by setting a protective layer on the surface of the code disc substrate, the anti-fouling ability of the code disc structure can be improved, which greatly reduces the risk of the code disc structure being contaminated by foreign matter such as oil and powder, ensures the stability of the encoder signal, and reduces the possibility of encoder failure due to signal abnormality, thereby improving the reliability of the encoder during application and reducing maintenance costs.
[0162] Second, the protective layer is made of one of the materials selected from silica, alumina, nanosilver and fluoride. Since nanomaterials such as silica, alumina, nanosilver and fluoride have good transparency, the protective layer can be made transparent, thereby ensuring the optical properties of the code disk substrate.
[0163] Third, the size of the nano-protrusions is maintained between 100 and 200 nanometers and 10 and 50 nanometers, so that a lotus effect is formed on the surface of the protective layer, which can facilitate the fall of foreign matter from the surface of the protective layer, thereby enabling the protective layer to effectively reduce the residue of oil, dust and fingerprints on the surface of the code disk structure.
[0164] Fourth, by adopting the code disc structure obtained by the preparation method described in Example 1, an ultra-thin nanomaterial protective layer is provided on its upper and lower surfaces, and the protective layer can increase the contact angle of the code disc structure with water to more than 90° to 150°, reaching a super hydrophobic state. The oil contact angle can be increased to more than 90° to 120°, reaching a super oleophobic state. The surface free energy can be reduced to 10mJ / m2 to 30mJ / m2. The waterproof and oil-proof properties of the code disc structure are significantly improved, and the adhesion of pollutants to the surface of the code disc structure is significantly reduced. The protective layer 3 can increase the surface roughness by more than 10 times, significantly improving the waterproof and oil-proof properties, thereby being able to effectively reduce the residue of oil, dust and fingerprints on the surface of the code disc, and improving the anti-fouling ability of the code disc structure, thereby ensuring the stability of the encoder signal, improving the reliability of the encoder during application, and reducing maintenance costs.
[0165] It is further understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.
[0166] It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.
[0167] It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.
[0168] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.
[0169] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.
Claims
1. A code disc structure, characterized in that: It comprises a code disc body and a protective layer (3), wherein: The code disc body comprises a code disc substrate (1) and a line-engraved coating (2); the code disc substrate (1) has a top surface (101) and a bottom surface (102) opposite to each other in a height direction; and the line-engraved coating (2) is formed on the top surface (101); The protective layer (3) is formed on the upper surface and the lower surface of the code disc body, the upper surface of the code disc body includes the surface of the top surface (101) that is not covered by the engraved coating (2) and the surface of the engraved coating (2), and the lower surface of the code disc body includes the bottom surface (102) of the code disc substrate (1).
2. The code disc structure according to claim 1, characterized in that: The protective layer (3) is a nano layer, and the protective layer (3) is transparent.
3. The code disc structure according to claim 2, characterized in that: The protective layer (3) is made of one of silicon dioxide, aluminum oxide, nano silver and perfluorooctyltrimethoxysilane.
4. The code disc structure according to claim 3, characterized in that: The thickness of the protective layer (3) is 10 to 100 nanometers; The surface of the protective layer (3) is a hydrophobic surface with nano-protrusions (4) distributed thereon.
5. The code disc structure according to claim 4, characterized in that: The nano-protrusion (4) has a height of h and a width of d; Among them, d is 100 to 200 nanometers, and h is 10 to 50 nanometers.
6. The code disc structure according to any one of claims 1 to 5, characterized in that: The preparation method of the protective layer (3) comprises: Evenly dispersing the nanomaterials into a solvent to prepare a nano solution; The code disc body is coated with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating.
7. The code disc structure according to claim 6, characterized in that: The solvent is one of ethanol, isopropanol or deionized water; The concentration of the nano material in the solvent is 2% to 5%.
8. The code disc structure according to claim 6, characterized in that: The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises: Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body; Wherein, the spraying pressure of the sprayer is 0.3MPa-0.5MPa, the spraying flow rate is 150mL / min-250mL / min, and the spraying distance is 15cm-25cm.
9. The code disc structure according to claim 6, characterized in that: The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises: The code disc body is placed in a container having the nano solution, immersed for 10s to 60s, and the code disc body is taken out of the nano solution at a constant speed.
10. The code disc structure according to claim 6, characterized in that: The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises: Adding the nano-solution dropwise to the rotating code disc body, so that the nano-material in the added nano-solution is evenly distributed on the code disc body; The rotation speed of the code disc body is 2000 rpm to 5000 rpm, the rotation time is 20 s to 30 s, and the drop amount of the nano solution is 0.2 mL to 0.5 mL.
11. The code disc structure according to claim 6, characterized in that: The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises: Depositing the nanomaterial in the nano solution on the code disc body by physical vapor deposition; The physical vapor deposition adopts argon as the sputtering gas, the sputtering power is 100W to 300W, the substrate bias voltage is -50 to -200V, and the vacuum degree is 10 -6 ~10 -4 Torr, deposition time: 20min~60min, the bias voltage of the code disc body is -50V~200V.
12. The code disc structure according to claim 6, characterized in that: Before the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pre-treated, and the pre-treatment includes: Cleaning the upper and lower surfaces of the code disc body using an organic solvent; Putting the cleaned code disc body into an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body; The oven temperature is 80° C. to 120° C., and the drying time is 10 min to 30 min.
13. The code disc structure according to claim 6, characterized in that: After the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes: Placing the code disc body in an oven for drying to solidify the protective layer (3); Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
14. A method for manufacturing a code disc structure, characterized in that: The code disc structure is the code disc structure according to any one of claims 1 to 13, and the method for manufacturing the code disc structure comprises: Evenly dispersing the nanomaterials into a solvent to prepare a nano solution; The code disc body is coated with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, thereby forming the protective layer (3) on the upper surface and the lower surface of the code disc body.
15. The method for manufacturing a code disc structure according to claim 14, characterized in that: The method of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating comprises: Using a sprayer to evenly spray the nano solution on the upper surface and the lower surface of the code disc body; Or, the code disc body is placed in a container having the nano solution for immersion, and the code disc body is taken out of the nano solution at a constant speed; Or, the nano-solution is dripped onto the rotating code disc body, so that the dripped nano-solution is evenly distributed on the code disc body; Alternatively, the nanomaterial in the nano solution is deposited on the code disc body by physical vapor deposition.
16. The method for manufacturing a code disc structure according to claim 14, characterized in that: Before the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the upper surface and the lower surface of the code disc body are pre-treated, and the pre-treatment includes: Use an organic solvent to clean the upper and lower surfaces of the code disc body. The cleaned code disc body is placed in an oven for drying to remove foreign matter on the upper and lower surfaces of the code disc body. The oven temperature is 80°C to 120°C, and the drying time is 10min to 30min; After the step of coating the code disc body with the nano-solution so that the nano-material is attached to the upper surface and the lower surface of the code disc body in the form of a coating, the surface of the code disc body is dried, and the drying process includes: The code disc body is placed in an oven for drying to solidify the protective layer (3). Wherein, the oven temperature is 150°C to 200°C, and the drying time is 20min to 60min.
17. An encoder, comprising a structure, an LED, a photosensitive unit, and a signal processing unit, characterized in that: The encoder further comprises: A code disc structure as described in any one of claims 1 to 13.