Portable contact angle measurement image acquisition device and method

Abstract

The invention provides a portable image acquisition device and method for contact angle measurement. Comprising a chassis, a chassis sliding rail and a sliding rail clamping seat, the top end of the chassis is connected with the chassis sliding rail; the top end of the chassis sliding rail is connected with a plurality of sliding rail clamping seats; the top of the sliding rail clamping base is used for fixing the image clamping mechanism, the fluid clamping mechanism and the light source mechanism. The image clamping mechanism is used for clamping an image acquisition device of liquid drops; the fluid clamping mechanism is used for clamping the injector to control the volume of the liquid drop to be detected and controlling the liquid drop to correspond to the liquid drop position of the second objective table; the light source mechanism is used for adjusting the intensity of the parallel light source in the measurement process. Compared with a traditional precise contact angle measuring instrument, through analysis and comparison, the device has the advantages that the working efficiency is greatly improved, the measured data result is accurate and free of deviation, the disassembly can be realized while the extremely high precision is ensured, the measurement is rapid, and the measuring device is convenient to carry, simple to operate and low in price.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to a portable image acquisition device and method for measuring contact angles. Background Art

[0002] As one of the many interface characterization techniques, the contact angle measurement technology of liquid on solid surface is widely used in various industries. It is of great value in the development of new materials close to daily life such as aviation manufacturing, maritime field, chip industry, military research and development, pharmaceutical antibacterial materials, flotation industry, nanotechnology, sewage treatment, ink, cosmetics, pesticide, printing and dyeing, papermaking, fabric finishing, detergent, spraying and other frontier technologies and the demand is particularly large. Most of the contact angle measurements of liquid on solid surface are to form a certain volume of droplets on the solid surface first, and then analyze them through image processing technology to obtain the required contact angle.

[0003] There are many types of contact angle meters on the market. Generally speaking, they all use the same principle, but differ in hardware configuration. The overall measurement accuracy has reached ±0.01°, and the measurement range has reached ±180°. However, they are limited by their own volume, weight, and computing equipment, making them difficult to carry. In order to meet basic measurement needs, contact angle meters on the market integrate many functions, but these functions are rarely used in experimental teaching and routine measurement. Existing contact angle measurement equipment is expensive, has a low degree of automation, is non-detachable, and requires specific professionals to operate, which makes measurement in related fields more difficult and significantly increases costs, which is not conducive to further expansion and research in related fields. Summary of the invention

[0004] According to the above, the existing contact angle measuring instruments are limited by their own volume, weight and computing equipment, which makes it difficult to achieve portability. In addition, there are technical problems such as large pixel accuracy and measurement error in the image droplet, and a portable contact angle measuring device and method are provided. The present invention mainly uses a slide rail support mechanism to slide and fix the image clamping mechanism, the fluid clamping mechanism and the light source mechanism on the base, and they are connected to each other in a detachable manner, so that they are easy to disassemble and carry; at the same time, the image clamping mechanism, the fluid clamping mechanism and the light source mechanism are set to improve the pixel accuracy of the image droplet and reduce the problem of measurement error.

[0005] The technical means adopted by the present invention are as follows:

[0006] A portable image acquisition device for contact angle measurement, comprising: a chassis, a chassis slide rail, a slide rail clamping seat, an image clamping mechanism, a fluid clamping mechanism and a light source mechanism; the top of the chassis is connected to the chassis slide rail; the top of the chassis slide rail is connected to a plurality of slide rail clamping seats; the top of the slide rail clamping seat is used to fix the image clamping mechanism, the fluid clamping mechanism and the light source mechanism respectively;

[0007] The image clamping mechanism is used to clamp the image acquisition device of the droplet;

[0008] The fluid clamping mechanism is used to clamp the syringe to control the volume of the measured droplet and simultaneously control the droplet position corresponding to the second stage;

[0009] The light source mechanism is used to adjust the intensity of the parallel light source during the measurement process.

[0010] Furthermore, the slide rail clamp seat is composed of two sets of upper and lower clamp seats, and the clamping force is adjusted by adjusting the screw knob.

[0011] Furthermore, the image clamping mechanism includes: a first stage, a first fixed bracket, a fine-tuning slider and a mobile phone clamping frame; the first stage is fixed to the top of the first slide rail clamp; the bottom of the first fixed bracket is installed in the limiting groove on the top of the first stage; the top side of the first fixed bracket is connected with a fine-tuning slider; one side of the fine-tuning slider is connected to the mobile phone clamping frame; a rotating knob is provided on the side wall of the fine-tuning slider; the mobile phone clamping frame adjusts the clamping of the mobile phone by adjusting the fixing nut.

[0012] Furthermore, the fluid clamping mechanism includes: a second stage, a second fixed bracket and a syringe locking ring; the center screw hole of the second stage is connected to the screw hole at the top of the second slide rail clamp through a gasket; the bottom of the second fixed bracket is installed in the limiting groove at the top of the second stage; a syringe locking ring is provided on the top side of the second fixed bracket; the syringe locking ring is used to clamp the syringe.

[0013] Furthermore, the light source mechanism includes: a parallel light source plate, a fixing block and a fastening gasket; the fixing block is connected to the screw hole at the top of the third slide rail clamp through bolts; the base of the parallel light source plate is clamped at the bottom of the fixing block; a fastening gasket is provided at the rear of the parallel light source plate; the fastening gasket is fixed by bolts and nuts.

[0014] Furthermore, the parallel light source plate uses an LED flat light source to emit parallel cold light for illumination.

[0015] Furthermore, the image acquisition device is a mobile phone.

[0016] A portable image acquisition method for contact angle measurement, based on the portable image acquisition device for contact angle measurement, comprises the following steps:

[0017] S1: First, put the mobile phone upside down and clamp it in the mobile phone holder, and adjust the fixing nut to fix the mobile phone;

[0018] S2: Use a syringe to extract the required test liquid sample, clamp the syringe in the syringe locking ring, and then adjust the height of the syringe. The distance between the syringe needle and the second stage is 0.3mm;

[0019] S3: Turn on the parallel light source panel and adjust it to the cold light mode;

[0020] S4: By adjusting the position of the fine-tuning slider on the top of the first fixed bracket, the shooting position of the mobile phone is matched with the position of the droplet on the top of the second stage; by adjusting the position of each slide rail clamp on the chassis slide rail, the image clamping mechanism, the fluid clamping mechanism and the light source mechanism are adjusted to corresponding positions, so that the mobile phone camera, the plane of the second stage and the light source of the parallel light source plate are located on the same optical path, so that the picture taken by the mobile phone camera remains clear and visible;

[0021] S5: Slowly push the plunger of the syringe to drop the required test liquid onto the plane of the second stage. At this time, a clear contour curve of the test drop appears in the center of the mobile phone screen, and a photo is taken to obtain the image acquisition of the contact angle measurement.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention provides a portable image acquisition device and method for contact angle measurement, which realizes image acquisition required for contact angle measurement by arranging a chassis slide rail on the chassis, fixing an image clamping mechanism, a fluid clamping mechanism and a light source mechanism on the chassis slide rail through a slide rail clamp.

[0024] 2. All mechanisms of the present invention are connected in a detachable manner, which allows for complete disassembly, simple assembly, and portability; it is small in size, low in cost, easy to operate, and has high measuring efficiency.

[0025] 3. The present invention adopts a leveling design: the horizontal angle of the device can be adjusted by rotating the chassis screws; the image clamping mechanism is compatible with all sizes of mobile phones on the market; the U-shaped groove setting of the mobile phone clamping frame can prevent accidental touching of the volume button and the power button; the hollow design can save materials while ensuring the mechanical strength, and ensure the lightness and beauty of the device.

[0026] 4. The present invention can effectively solve the influence of light source scattering, diffraction and diffuse reflection on droplet imaging by setting a light source mechanism, ensure that the imaging is true and accurate, and guarantee the accuracy of the data from the source. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 It is an overall stereogram of the present invention.

[0029] Figure 2 It is a schematic diagram of the chassis, chassis slide and slider clamp structure of the present invention.

[0030] Figure 3 It is a three-dimensional schematic diagram of the image clamping mechanism of the present invention.

[0031] Figure 4 It is a three-dimensional schematic diagram of the fluid clamping mechanism of the present invention.

[0032] Figure 5 It is a three-dimensional schematic diagram of the light source mechanism of the present invention.

[0033] In the figure: 1, chassis; 2, chassis slide rail; 3, first slide rail clamp seat; 4, second slide rail clamp seat; 5, first slide rail clamp seat; 6, image acquisition device; 7, syringe; 8, adjustment knob; 301, first stage; 302, first fixed bracket; 303, fine-tuning slider; 304, mobile phone holder; 305, adjustment fixing nut; 306, rotating knob; 401, second stage; 402, second fixed bracket; 403, syringe locking ring; 501, parallel light source plate; 502, fixing block; 503, fastening gasket. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0039] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0040] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] like Figure 1-5 As shown, the present invention provides a portable image acquisition device for contact angle measurement, comprising: a chassis 1, a chassis slide rail 2, a slide rail clamping seat, an image clamping mechanism, a fluid clamping mechanism and a light source mechanism; the top of the chassis 1 is connected to the chassis slide rail 2; the top of the chassis slide rail 2 is connected to a plurality of slide rail clamping seats; the top of the slide rail clamping seat is used to fix the image clamping mechanism, the fluid clamping mechanism and the light source mechanism respectively;

[0042] The image clamping mechanism is used to clamp the image acquisition device 6 of the droplet. After the image of the contact angle measurement is acquired, it is imported into the contact angle measurement APP. The measured area is selected, and the software automatically calculates the contact angle data of the droplet contour;

[0043] The fluid clamping mechanism is used to clamp the syringe 7 to control the volume of the measured droplet, and at the same time control the droplet position corresponding to the second stage 401;

[0044] The light source mechanism is used to adjust the intensity of the parallel light source during the measurement process.

[0045] The chassis slide rail 2 is fixed on the top of the chassis 1, and the chassis slide rail 2 slides back and forth in the slide rail groove on the chassis 1; the loading platform can slide left and right in the top groove of the slide rail clamp; the slide rail clamp consists of two sets of upper and lower clamps, and the clamping force is adjusted by adjusting the knob 8.

[0046] The image clamping mechanism includes: a first stage 301, a first fixed bracket 302, a fine-tuning slider 303 and a mobile phone clamping frame 304; the first stage 301 is fixed to the top of the first slide rail clamp 3; the bottom of the first fixed bracket 302 is installed in the limiting groove at the top of the first stage 301; the top side of the first fixed bracket 302 is connected with a fine-tuning slider 303; one side of the fine-tuning slider 303 is connected to a mobile phone clamping frame 304; a rotating knob 306 is provided on the side wall of the fine-tuning slider 303; the mobile phone clamping frame 304 adjusts the clamping of the mobile phone by adjusting the fixing nut 305.

[0047] The first loading platform 301 is arranged on the top of the slide rail clamp, so that the mobile phone camera is located in the middle of the droplet.

[0048] The fluid clamping mechanism includes: a second stage 401, a second fixed bracket 402 and a syringe locking ring 403; the central screw hole of the second stage 401 is connected to the screw hole at the top of the second slide rail clamp 4 through a gasket; the bottom of the second fixed bracket 402 is installed in the limiting groove at the top of the second stage 401; a syringe locking ring 403 is provided on the top side of the second fixed bracket 402; the syringe locking ring 403 is used to clamp the syringe 7.

[0049] The slot of the second fixing bracket 402 can realize the lifting and lowering of the second stage 401 ; the syringe 7 squeezes the fluid onto the second stage 401 or suspends at the outlet of the syringe 7 .

[0050] The light source mechanism includes: a parallel light source plate 501, a fixing block 502 and a fastening gasket 503; the fixing block 502 is connected to the screw hole at the top of the third slide rail clamp 5 by bolts; the base of the parallel light source plate 501 is clamped at the bottom of the fixing block 502; a fastening gasket 503 is provided at the rear of the parallel light source plate 501; the fastening gasket 503 is fixed by bolts and nuts.

[0051] The parallel light source plate 501 uses an LED flat light source to emit parallel cold light for illumination. The parallel light emitted by the LED cold light source passes through the stage as the background light source for droplet imaging, so that a high contrast is formed between the droplet to be measured and the background, thereby highlighting the droplet outline and being able to adjust the light intensity.

[0052] The image acquisition device 6 is a mobile phone.

[0053] A portable image acquisition method for contact angle measurement, based on the above-mentioned portable image acquisition device for contact angle measurement, comprises the following steps:

[0054] S1: First, place the mobile phone upside down and clamp it in the mobile phone clamping frame 304, and adjust the fixing nut to fix the mobile phone;

[0055] S2: Use the syringe 7 to extract the required test liquid sample, clamp the syringe 7 in the syringe locking ring 403, and then adjust the height of the syringe 7. The distance between the needle of the syringe 7 and the second stage 403 is 0.3 mm;

[0056] S3: Turn on the parallel light source plate 501 and adjust it to the cold light mode;

[0057] S4: By adjusting the position of the fine-tuning slider 303 on the top of the first fixed bracket 302, the shooting position of the mobile phone is matched with the position of the droplet on the top of the second stage 401; by adjusting the position of each slide rail clamp on the chassis slide rail, the image clamping mechanism, the fluid clamping mechanism and the light source mechanism are adjusted to corresponding positions, so that the mobile phone camera, the plane of the second stage 401 and the light source of the parallel light source plate 501 are located on the same optical path, so that the picture taken by the mobile phone camera remains clear and visible;

[0058] S5: Slowly push the syringe plunger to drop the required test liquid onto the plane of the second stage 401. At this time, a clear contour curve of the test drop appears in the center of the mobile phone screen, and a photo is taken to obtain an image acquisition for contact angle measurement.

[0059] The present invention provides a portable contact angle measurement image acquisition device and method. Compared with the traditional precision contact angle measuring instrument, the device greatly improves the working efficiency through analysis and comparison, and the detection data results are free of deviation. The present invention can be disassembled while ensuring extremely high accuracy, and has fast measurement, small size, simple operation, and low price, which is an urgent need in the field of new material development.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable image acquisition device for contact angle measurement, characterized in that: include: A chassis (1), a chassis slide rail (2), a slide rail clamping seat, an image clamping mechanism, a fluid clamping mechanism and a light source mechanism; the top of the chassis (1) is connected to the chassis slide rail (2); the top of the chassis slide rail (2) is connected to a plurality of slide rail clamping seats; the tops of the slide rail clamping seats are used to fix the image clamping mechanism, the fluid clamping mechanism and the light source mechanism respectively; The image clamping mechanism is used to clamp the image acquisition device (6) of the droplet; The fluid clamping mechanism is used to clamp the syringe (7) to control the volume of the measured droplet and simultaneously control the position of the droplet corresponding to the second stage (401); The light source mechanism is used to adjust the intensity of the parallel light source during the measurement process.

2. A portable contact angle measurement image acquisition device according to claim 1, characterized in that: The slide rail clamp seat is composed of two sets of upper and lower clamp seats, and the clamping force is adjusted by adjusting the screw button (8).

3. A portable contact angle measurement image acquisition device according to claim 1 or 2, characterized in that: The image clamping mechanism comprises: a first loading platform (301), a first fixed bracket (302), a fine-tuning slider (303) and a mobile phone clamping frame (304); the first loading platform (301) is fixed to the top of the first slide rail clamping seat (3); the bottom of the first fixed bracket (302) is installed in the limiting groove at the top of the first loading platform (301); the top side of the first fixed bracket (302) is connected with a fine-tuning slider (303); one side of the fine-tuning slider (303) is connected with the mobile phone clamping frame (304); a rotating knob (306) is provided on the side wall of the fine-tuning slider (303); the mobile phone clamping frame (304) is adjusted to clamp the mobile phone by adjusting the fixing nut (305).

4. A portable contact angle measurement image acquisition device according to claim 1 or 2, characterized in that: The fluid clamping mechanism comprises: a second stage (401), a second fixed bracket (402) and a syringe locking ring (403); the central screw hole of the second stage (401) is connected to the screw hole at the top of the second slide rail clamp (4) through a cushion block; the bottom of the second fixed bracket (402) is installed in the limiting groove at the top of the second stage (401); the top side of the second fixed bracket (402) is provided with a syringe locking ring (403); the syringe locking ring (403) is used to clamp the syringe (7).

5. A portable contact angle measurement image acquisition device according to claim 1 or 2, characterized in that: The light source mechanism comprises: a parallel light source plate (501), a fixing block (502) and a fastening gasket (503); the fixing block (502) is connected to a screw hole at the top of a third slide rail clamp (5) via a bolt; the base of the parallel light source plate (501) is clamped at the bottom of the fixing block (502); a fastening gasket (503) is provided at the rear of the parallel light source plate (501); the fastening gasket (503) is fixed via a bolt and a nut.

6. A portable contact angle measurement image acquisition device according to claim 5, characterized in that: The parallel light source plate (501) uses an LED flat light source to emit parallel cold light for illumination.

7. A portable contact angle measurement image acquisition device according to claim 1, characterized in that: The image acquisition device (6) is a mobile phone.

8. A portable image acquisition method for contact angle measurement, based on a portable image acquisition device for contact angle measurement according to any one of claims 1 to 7, characterized in that: The steps include: S1: First, place the mobile phone upside down and clamp it in the mobile phone clamping frame (304), and adjust the fixing nut (305) to fix the mobile phone; S2: Use the syringe (7) to extract the required test liquid sample, clamp the syringe (7) in the syringe locking ring (403), and then adjust the height of the syringe (7). The distance between the needle of the syringe (7) and the second stage (403) is 0.3 mm; S3: Turn on the parallel light source plate (501) and adjust it to the cold light mode; S4: by adjusting the position of the fine-tuning slider (303) on the top of the first fixed bracket (302), the shooting position of the mobile phone is matched with the position of the liquid droplet on the top of the second stage (401); by adjusting the position of each slide rail clamp seat on the chassis slide rail (2), the image clamping mechanism, the fluid clamping mechanism and the light source mechanism are adjusted to corresponding positions, so that the mobile phone camera, the plane of the second stage (401) and the light source of the parallel light source plate (501) are located on the same optical path, so that the picture taken by the mobile phone camera remains clear and visible; S5: slowly push the plunger of the syringe (7) to drop the required test liquid onto the plane of the second stage (401). At this time, a clear contour curve of the test drop appears in the center of the mobile phone screen, and a photo is taken to obtain an image collection for contact angle measurement.

Images