Contact angle measurement objective table and contact angle measurement device

Abstract

The utility model relates to a contact angle measuring objective table and a contact angle measuring device, the contact angle measuring objective table comprises a base, a shear type adjusting mechanism, a lifting table, a rotating table, a heating plate and an objective table, the distance between the lifting table and the base is adjusted through the shear type adjusting mechanism, and the objective table is connected with the lifting table through the rotating table. The rotary table is used for driving the object carrying platform to rotate, a clamp is arranged on the object carrying platform and used for fixing a tested material, a heating plate is arranged below the object carrying platform and used for heating the object carrying platform to keep the object carrying platform at a certain temperature, and fine adjustment mechanisms are arranged at four corners of the base respectively and used for adjusting the levelness of the object carrying platform. And a gradienter is arranged on the lifting platform and / or the loading platform. According to the contact angle measurement objective table, the height can be conveniently adjusted, the temperature of the objective table can be conveniently controlled, the contact angle of liquid drops can be conveniently measured, and the cost is low.

Description

Technical Field

[0001] The utility model relates to a liquid drop contact angle measurement technology, in particular to a contact angle measurement stage and a contact angle measurement device. Background Art

[0002] When a liquid droplet forms on a horizontal solid surface and reaches a steady state, the angle between the tangent line of the gas-liquid interface at the liquid-solid-gas three-phase junction and the solid-liquid interface is the contact angle. The magnitude and characteristics of the contact angle significantly influence the droplet's spreading, adsorption, and flow behavior on the solid surface. Contact angle measurement technology has been widely used in various industrial and scientific fields, including the petroleum industry, pharmaceutical materials, low-surface-energy antifouling materials, inks, cosmetics, and metallurgy.

[0003] Current droplet contact angle measuring instruments on the market are all integrated, with the stage, camera module, light source, and dropper all mounted on a base, making the overall equipment relatively expensive. In experimental research, it is often necessary to measure the contact angle of solid material surfaces, so a simple, low-cost contact angle measurement device is urgently needed. Utility Model Content

[0004] The purpose of the utility model is to provide a contact angle measurement stage and a contact angle measurement device to solve the problem of high cost of existing droplet contact angle measuring instruments.

[0005] The utility model is implemented as follows: a contact angle measurement platform, including a base, a scissor-type adjustment mechanism, a lifting platform, a rotating platform, a heating plate and a loading platform, the lifting platform is located above the base and is connected to the base through a scissor-type adjustment mechanism, the distance between the lifting platform and the base is adjusted by the scissor-type adjustment mechanism, the loading platform is connected to the lifting platform through a rotating platform, the rotating platform is used to drive the loading platform to rotate, a clamp is provided on the loading platform for fixing the material to be measured, a heating plate is provided under the loading platform, the heating plate is used to heat the loading platform to keep it at a certain temperature, fine-tuning mechanisms are respectively provided at the four corners of the base, the fine-tuning mechanisms are used to adjust the levelness of the loading platform, and a spirit level is provided on the lifting platform and / or the loading platform.

[0006] Furthermore, the scissor-type adjustment mechanism includes a lower slide rail, an upper slide rail, a first arm, a second arm, a first hinge axis, a second hinge axis, a first sliding axis, a second sliding axis and an adjusting rod. There are two lower rails and they are arranged on both sides of the base. There are two upper slide rails and they are arranged on both sides of the lifting platform. The first arm and the second arm are hinged to each other to form an X-shaped structure. The lower end of the first arm is rotatably connected to the lower rail through the first hinge axis, the lower end of the second arm is slidably connected to the lower rail through the first sliding axis, the upper end of the second arm is rotatably connected to the upper slide rail through the second hinge axis, the upper end of the first arm is slidably connected to the upper slide rail through the second sliding axis, and the adjusting rod is used to adjust the distance between the second hinge axis and the second sliding axis to adjust the distance between the lifting platform and the base.

[0007] Furthermore, the adjustment rod passes through the second hinge shaft and the second sliding shaft, and the adjustment rod is threadedly connected to one of the second hinge shaft and the second sliding shaft, and is rotationally connected to the other one.

[0008] Furthermore, the fine-tuning mechanism includes a connecting ear, on which a vertical fine-tuning bolt is threadedly connected.

[0009] Furthermore, it also includes a temperature control module, which includes a temperature sensor and a temperature control circuit board electrically connected to each other. The temperature sensor is arranged on the upper surface of the loading platform to monitor the temperature of the upper surface of the loading platform and transmit the temperature signal to the temperature control circuit board. The temperature control circuit board is electrically connected to the heating plate to control the heating temperature of the heating plate.

[0010] Furthermore, a single chip microcomputer, a digital tube display module and a key module are arranged on the temperature control circuit board.

[0011] Furthermore, it also includes a fan, which is arranged on one side of the loading platform and is used to cool the loading platform. The fan is electrically connected to the temperature control circuit board, and the temperature control circuit board controls the start and stop of the fan.

[0012] Furthermore, an adjusting knob is provided on one side of the rotating table, and the adjusting knob is used to drive the rotating table to rotate.

[0013] The utility model also discloses a contact angle measuring device, including a contact angle measuring stage, a dripping device, a shooting device and a light source device. The contact angle measuring stage includes a base, a scissor-type adjustment mechanism, a lifting platform, a rotating platform, a heating plate and a loading platform. The lifting platform is located above the base and is connected to the base through the scissor-type adjustment mechanism. The distance between the lifting platform and the base is adjusted by the scissor-type adjustment mechanism. The loading platform is connected to the lifting platform through the rotating platform. The rotating platform is used to drive the loading platform to rotate. A clamp is provided on the loading platform for fixing the material to be measured. A heating plate is provided under the loading platform. The heating plate is used to heat the loading platform to keep it at a certain temperature. Fine-tuning mechanisms are respectively provided at the four corners of the base. The fine-tuning mechanisms are used to adjust the levelness of the loading platform. A spirit level is provided on the lifting platform and / or the loading platform.

[0014] Furthermore, the photographing device is a mobile phone with a photographing function.

[0015] The utility model provides a contact angle measurement stage. The contact angle measurement stage is an independent structure and is used to fix solid surface materials. The height of the stage can be conveniently adjusted by a scissor-type adjustment mechanism, and the stage can be conveniently rotated by a rotating table. The horizontality of the contact angle measurement stage can be independently adjusted. Since it can be manufactured separately, its cost is low.

[0016] At the same time, the contact angle measurement stage of the present invention can adjust the temperature of the stage, thereby adjusting the surface temperature of the solid material being measured, so that it can be used to explore the changing trend of the contact angle of the solid material at different temperatures.

[0017] The contact angle measurement stage of the present invention can be used in conjunction with an existing droplet device, a shooting device, and a light source device to form a contact angle measurement device, which can measure the contact angle of the surface of a solid material. The cost is much lower than purchasing an integrated droplet contact angle measurement device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic diagram of the contact angle measurement stage of the present utility model.

[0019] Figure 2 It is a cross-sectional view of the scissor-type adjustment mechanism of the utility model.

[0020] Figure 3 It is a structural schematic diagram of the contact angle measuring device of the present utility model.

[0021] In the figure: 1. Contact angle measurement stage; 2. Dropping device; 3. Shooting device; 4. Light source device; 5. Temperature control module; 1-1. Base; 1-2. Lifting platform; 1-3. Rotating platform; 1-4. Loading platform; 1-5. Clamp; 1-6. Lower slide rail; 1-7. Upper slide rail; 1-8. First arm; 1-9. Second arm; 1-10. First hinge axis; 1-11. Second hinge axis; 1-12. First sliding axis; 1-13. Second sliding axis; 1-14. Adjusting rod; 1-15. Connecting ear; 1-16. Fine-tuning bolt; 1-17. Level; 1-18. Fan; 1-19. Heating plate; 1-20. Limiting structure; 5-1. Temperature control circuit board; 5-2. Temperature sensor; 5-3. Single chip microcomputer; 5-4. Digital tube display module; 5-5. Key module. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Example 1

[0024] This embodiment is a contact angle measurement stage 1, such as Figure 1 As shown, its structure specifically includes a base 1-1, a scissor-type adjustment mechanism, a lifting platform 1-2, a rotating platform 1-3, a heating plate 1-19 and a loading platform 1-4.

[0025] The base 1-1 is a horizontal plate-like structure. The lifting platform 1-2 is located directly above the base 1-1 and is connected to the base 1-1 via a scissor-type adjustment mechanism. The scissor-type adjustment mechanism adjusts the distance between the lifting platform 1-2 and the base 1-1. A rotating platform 1-3 is provided at the center of the upper surface of the lifting platform 1-2. A loading platform 1-4 is provided on the rotating platform 1-3. The rotating platform 1-3 can drive the loading platform 1-4 to rotate.

[0026] An adjusting knob is provided on one side of the rotating table 1 - 3 , and the adjusting knob is used to drive the rotating table 1 - 3 to rotate around the axis of the rotating table 1 - 3 .

[0027] A clamp 1-5 is provided on the upper surface of the loading platform 1-4. The clamp 1-5 is used to fix the solid material to be tested. The solid material to be tested is generally a sheet material. The clamp arms of the clamp 1-5 on both sides press the material to be tested against the upper surface of the loading platform 1-4.

[0028] When the upper surface of the loading platform 1-4 is horizontal, the levelness of the upper surface of the solid material being measured can be guaranteed. Fine adjustment mechanisms are provided at the four corners of the base 1-1. The fine adjustment mechanisms are used to adjust the levelness of the loading platform 1-4. A level gauge 1-17 is also provided. Whether the loading platform 1-4 is horizontal can be determined by observing the level gauge 1-17. The level gauge 1-17 is generally provided on the loading platform 1-4, and an auxiliary level gauge 1-17 can also be provided on the lifting platform 1-2.

[0029] The fine-tuning mechanism includes a connecting ear 1-15 located on the side of the base 1-1, and a vertical fine-tuning bolt 1-16 is threadedly connected to the connecting ear 1-15.

[0030] A heating plate 1-19 is provided on the lower surface of the loading platform 1-4. The heating plate 1-19 is embedded in the lower surface of the loading platform 1-4, or a mounting groove is provided on the lower surface of the loading platform 1-4, and the heating plate 1-19 is fixedly installed in the mounting groove, and the heating plate 1-19 is in close contact with the loading platform 1-4. The loading platform 1-4 is made of metal, which has excellent thermal conductivity. The heat from the heating plate 1-19 can be quickly and evenly transferred to the upper surface of the loading platform 1-4, thereby uniformly heating the solid material being tested fixed to the loading platform 1-4.

[0031] like Figure 1 、 Figure 2 As shown, the scissor-type adjustment mechanism includes a lower slide rail 1-6, an upper slide rail 1-7, a first support arm 1-8, a second support arm 1-9, a first hinge shaft 1-10, a second hinge shaft 1-11, a first sliding shaft 1-12, a second sliding shaft 1-13, and an adjustment rod 1-14. There are two lower slide rails 1-6, which are arranged on both sides of the base 1-1, and two upper slide rails 1-7, which are arranged on both sides of the lifting platform 1-2. The lower slide rails 1-6 and the upper slide rails 1-7 are arranged horizontally and parallel to each other, and the upper slide rail 1-7 is located directly above the lower slide rail 1-6. Slide grooves are respectively provided on the inner sides of the lower and upper slide rails 1-6 and 1-7. The two first arms 1-8 and the two second arms 1-9 are hinged to each other to form two X-shaped structures. The lower ends of the two first arms 1-8 are rotationally connected to the lower slide rail 1-6 via the first hinge shaft 1-10. The lower ends of the two second arms 1-9 are slidingly connected to the lower slide rail 1-6 via the first sliding shaft 1-12. The upper ends of the two second arms 1-9 are rotationally connected to the upper slide rail 1-7 via the second hinge shaft 1-11. The upper ends of the two first arms 1-8 are slidingly connected to the upper slide rail 1-7 via the second sliding shaft 1-13. Since the upper ends of the first arms 1-8 can slide within the upper slide rail 1-7 and the lower ends of the second arms 1-9 can slide within the lower slide rail 1-6, the overall height can be adjusted by the spacing between the second hinge shaft 1-11 and the second sliding shaft 1-13.

[0032] The first support arm 1-8 is rotatably connected to the first hinge shaft 1-10 and the second sliding shaft 1-13, and the second support arm 1-9 is rotatably connected to the first sliding shaft 1-12 and the second hinge shaft 1-11.

[0033] The adjusting rod 1-14 passes through the second hinge shaft 1-11 and the second sliding shaft 1-13. The adjusting rod 1-14 is threadedly connected to one of the second hinge shaft 1-11 and the second sliding shaft 1-13, and is rotationally connected to the other. If the adjusting rod 1-14 is threadedly connected to the second hinge shaft 1-11, while the adjusting rod 1-14 is rotationally connected to the second sliding shaft 1-13, two limiting structures 1-20 are provided on the adjusting rod 1-14, and the second sliding shaft 1-13 is located between the two limiting structures 1-20, so that only relative rotation occurs between the adjusting rod 1-14 and the second sliding shaft 1-13. When the adjusting rod 1-14 rotates, the second hinge shaft 1-11 is driven closer to or farther away from the second sliding shaft 1-13 via the threaded connection.

[0034] The adjusting rod 1-14 may be a whole screw rod, and the limiting structure 1-20 may be a nut threadedly connected to the adjusting rod, and the second sliding shaft in the middle is limited by the two nuts.

[0035] In order to increase the stability of the scissor-type adjustment mechanism, connecting plates are provided between the two first arms 1 - 8 and between the two second arms 1 - 9 .

[0036] The present invention further includes a temperature control module 5, which includes a temperature control circuit board 5-1 and a temperature sensor 5-2. The temperature control circuit board 5-1 and the temperature sensor 5-2 are electrically connected to each other. The temperature sensor 5-2 is disposed on the upper surface of the loading platform 1-4 and is used to monitor the temperature of the upper surface of the loading platform 1-4. The temperature sensor 5-2 is connected to the temperature control circuit board 5-1 via a DuPont wire, so that the temperature control circuit board 5-1 can be away from the heating plate 1-19. The temperature control circuit board 5-1 is electrically connected to the heating plate 1-19 via a wire. The temperature sensor 5-2 transmits a temperature signal to the temperature control circuit board 5-1, and the temperature control circuit board 5-1 controls the heating temperature of the heating plate 1-19.

[0037] A fan 1-18 is also provided on the loading platform to cool the loading platform. The fan 1-18 is electrically connected to the temperature control circuit board 5-1, which controls the start and stop of the fan 1-18. The fan 1-18 is located on one side of the lower portion of the loading platform. The rotation of the fan 1-18 creates an airflow beneath the loading platform 1-4, which cools the loading platform 1-4.

[0038] A single chip microcomputer 5-3, a digital tube display module 5-4 and a key module 5-5 are arranged on the temperature control circuit board 5-1.

[0039] The heating plate 1-19, the temperature sensor 5-2, the temperature control circuit board 5-1 and the fan 1-18 constitute a temperature control system.

[0040] The STC89C52 microcontroller 5-3 serves as the core processing unit for temperature control, responsible for temperature monitoring and control. The DS18B20 temperature sensor 5-2 monitors the surface temperature of the loading platform 1-4 in real time, offering high accuracy and wide applicability. The keypad module 5-5 sets upper and lower temperature limits, while the digital tube display module 5-4 displays the current and set temperatures. The relay module on the circuit board controls the heating element and fan 1-18. By setting upper and lower temperature limits, users can effectively control the temperature to meet the needs of experimental design.

[0041] The contact angle measurement stage 1 of this embodiment is an independent structure, and its various parts can be purchased on the market. The stage can be obtained by assembly. The height of the stage 1-4 can be easily adjusted by a scissor-type adjustment mechanism, and the stage 1-4 can be easily rotated by a rotating table 1-3. The levelness can also be adjusted independently, and the cost is relatively low.

[0042] At the same time, the contact angle measurement stage 1 of this embodiment can adjust the temperature of the platforms 1-4, thereby adjusting the surface temperature of the solid material being measured, which can be used to explore the change trend of the contact angle of the solid material at different temperatures.

[0043] Example 2

[0044] like Figure 3 As shown, this embodiment is a contact angle measurement device, which includes a contact angle measurement stage 1, a dropper 2, a camera 3, and a light source 4. It is used to accurately measure the contact angle of a droplet to evaluate the wettability of a liquid on a solid surface.

[0045] The contact angle measurement stage 1 is used to adjust the height of the stage and ensure the horizontal state of the solid surface. The contact angle measurement stage 1 includes a base 1-1, a scissor-type adjustment mechanism, a lifting platform 1-2, a rotating platform 1-3, a heating plate 1-19, and a loading platform 1-4. The lifting platform 1-2 is located above the base 1-1 and is connected to the base 1-1 through a scissor-type adjustment mechanism. The distance between the lifting platform 1-2 and the base 1-1 is adjusted by the scissor-type adjustment mechanism. The loading platform 1-4 is connected to the lifting platform 1-2 through a rotating table 1-3. The rotating table 1-3 is used to drive the loading platform 1-4 to rotate. A clamp 1-5 is provided on the loading platform 1-4 for fixing the material to be tested. A heating plate 1-19 is provided under the loading platform 1-4. The heating plate 1-19 is used to heat the loading platform 1-4 to keep it at a certain temperature. Fine-tuning mechanisms are respectively provided at the four corners of the base 1-1. The fine-tuning mechanisms are used to adjust the levelness of the loading platform 1-4. A spirit level 1-17 is provided on the lifting platform 1-2 and / or the loading platform 1-4.

[0046] The detailed structure of the contact angle measurement stage 1 is the same as that of the first embodiment and will not be described again here.

[0047] The contact angle measuring device also includes a data processing unit (computer).

[0048] The dripping device 2 can be a commercially available manual pipette. This delivers a quantitative amount of droplets, controlling the volume of the droplets to ensure consistent droplet flow throughout the experiment. The ergonomically designed pipette features a wide measuring range and controllable volume, making it suitable for accurately delivering droplets of varying sizes and allowing for quick tip and liquid changes during the experiment. The pipette model should be precisely matched to the desired droplet volume.

[0049] Camera 3 can be a mobile phone (smartphone) equipped with a camera function to capture the droplet's shape and contact angle. Compared to traditional CCD camera designs, smartphone imaging is more convenient and less expensive, while also meeting the required accuracy for droplet contact angle imaging. The captured images are then transmitted via the smartphone to a computer for image processing and data analysis to obtain the final contact angle measurement results.

[0050] Light source device 4 utilizes a Huakang Technology HK-L120-120-20 square LED light source and a 24V single-channel light source controller, providing high brightness, adjustable brightness, and uniform light distribution across the target area. This light source system provides ample light for droplet imaging, ensuring clear images. The adjustable brightness adapts to diverse experimental needs, ensuring uniform illumination during imaging and preventing uneven lighting from affecting contact angle measurements. Compared to traditional light source systems, this design offers the advantages of energy conservation, environmental protection, and high stability, meeting the high-precision requirements of contact angle measurements and improving measurement efficiency.

[0051] The images captured from the smartphone are processed by software on the computer.

[0052] The coordinated operation of these devices enables the droplet contact angle measurement system to efficiently and accurately measure the contact angle of a droplet under well-controlled experimental conditions, thereby facilitating the subsequent evaluation of the wettability of the material surface. At the same time, the cost is far lower than purchasing an all-in-one droplet contact angle measurement device.

Claims

1. A contact angle measurement stage, characterized in that: It includes a base, a scissor-type adjustment mechanism, a lifting platform, a rotating platform, a heating plate and a loading platform. The lifting platform is located above the base and is connected to the base through a scissor-type adjustment mechanism. The distance between the lifting platform and the base is adjusted by the scissor-type adjustment mechanism. The loading platform is connected to the lifting platform through a rotating platform. The rotating platform is used to drive the loading platform to rotate. A clamp is provided on the loading platform for fixing the material to be tested. A heating plate is provided under the loading platform. The heating plate is used to heat the loading platform to keep it at a certain temperature. Fine-tuning mechanisms are respectively provided at the four corners of the base. The fine-tuning mechanisms are used to adjust the levelness of the loading platform. A spirit level is provided on the lifting platform and / or the loading platform.

2. The contact angle measurement stage according to claim 1, characterized in that: The scissor-type adjustment mechanism includes a lower rail, an upper rail, a first arm, a second arm, a first hinge axis, a second hinge axis, a first sliding axis, a second sliding axis and an adjusting rod. There are two lower rails and they are arranged on both sides of the base. There are two upper slide rails and they are arranged on both sides of the lifting platform. The first arm and the second arm are hinged to each other to form an X-shaped structure. The lower end of the first arm is rotatably connected to the lower rail through the first hinge axis, the lower end of the second arm is slidably connected to the lower rail through the first sliding axis, the upper end of the second arm is rotatably connected to the upper slide rail through the second hinge axis, the upper end of the first arm is slidably connected to the upper slide rail through the second sliding axis, and the adjusting rod is used to adjust the distance between the second hinge axis and the second sliding axis to adjust the distance between the lifting platform and the base.

3. The contact angle measurement stage according to claim 2, characterized in that: The adjusting rod passes through the second hinge shaft and the second sliding shaft. The adjusting rod is threadedly connected to one of the second hinge shaft and the second sliding shaft, and is rotationally connected to the other one.

4. The contact angle measurement stage according to claim 1, characterized in that: The fine-tuning mechanism comprises a connecting ear, on which a vertical fine-tuning bolt is threadedly connected.

5. The contact angle measurement stage according to claim 1, characterized in that: It also includes a temperature control module, which includes a temperature sensor and a temperature control circuit board electrically connected to each other. The temperature sensor is arranged on the upper surface of the loading platform to monitor the temperature of the upper surface of the loading platform and transmit the temperature signal to the temperature control circuit board. The temperature control circuit board is electrically connected to the heating plate to control the heating temperature of the heating plate.

6. The contact angle measurement stage according to claim 5, characterized in that: A single chip microcomputer, a digital tube display module and a key module are arranged on the temperature control circuit board.

7. The contact angle measurement stage according to claim 5, characterized in that: It also includes a fan, which is arranged on one side of the loading platform and is used to cool the loading platform. The fan is electrically connected to the temperature control circuit board, and the temperature control circuit board controls the start and stop of the fan.

8. The contact angle measurement stage according to claim 1, characterized in that: An adjusting knob is provided on one side of the rotating platform, and the adjusting knob is used to drive the rotating platform to rotate.

9. A contact angle measuring device, characterized in that: It includes a contact angle measurement stage, a dripping device, a shooting device and a light source device. The contact angle measurement stage includes a base, a scissor-type adjustment mechanism, a lifting platform, a rotating platform, a heating plate and a loading platform. The lifting platform is located above the base and is connected to the base through a scissor-type adjustment mechanism. The distance between the lifting platform and the base is adjusted by the scissor-type adjustment mechanism. The loading platform is connected to the lifting platform through a rotating platform. The rotating platform is used to drive the loading platform to rotate. A clamp is provided on the loading platform for fixing the material to be measured. A heating plate is provided under the loading platform. The heating plate is used to heat the loading platform to keep it at a certain temperature. Fine-tuning mechanisms are respectively provided at the four corners of the base. The fine-tuning mechanisms are used to adjust the levelness of the loading platform. A spirit level is provided on the lifting platform and / or the loading platform.

10. The contact angle measuring device according to claim 9, characterized in that: The shooting device is a mobile phone with a shooting function.

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