A liquid viscosity detection device

Abstract

A liquid viscosity detection device, the adjustable horizontal base platform of the present invention is fixedly installed with an LED backlight source, a bubble generating device, a solution collecting tank, a bracket, and a CCD high-speed camera from left to right in sequence, and a normal pressure liquid supply device is installed on the bracket; a solution collecting tank is fixedly installed on the platform below the normal pressure liquid supply device; a controller is installed above the CCD high-speed camera, and the normal pressure liquid supply device and the bubble generating tank are connected to the controller through a communication cable; a host PC is installed on the side of the entire device, and the CCD high-speed camera and the controller are connected to it through a communication cable. The detection device is controlled to perform video acquisition of the droplets of the solution to be tested and the bubble generation process in the solution, and the characteristic data of the solution to be tested is obtained through video image processing and feature extraction. The soft measurement method is used to identify the viscosity of the liquid to be tested, thereby improving the accuracy and real-time performance of online viscosity detection in industrial scenarios.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and more specifically to a liquid viscosity testing device. Background Technology

[0002] Viscosity is the macroscopic manifestation of the intermolecular forces in a fluid. It is an important physical property parameter of fluids and is often used as a key indicator for evaluating fluid quality. Viscosity measurement is widely used in industrial process control, cardiovascular disease analysis, food and beverage quality testing, and metal particle detection. Traditional viscosity measurement methods, based on different detection principles, mainly include two types: fluid methods and kinematic methods. Fluid method measuring devices include effluent cup viscometers, capillary viscometers, and falling ball viscometers; kinematic method measuring devices include vibratory viscometers and rotational viscometers. These viscosity measurement devices are often very large and complex, have low detection accuracy, and are highly dependent on external environmental conditions. With the continuous improvement of production technology, the requirements for measurement accuracy, efficiency, and automation in industrial production processes are becoming increasingly higher. These traditional detection technologies often cannot meet the requirements of accuracy, simplicity, speed, and efficiency in online detection scenarios. Summary of the Invention

[0003] To address the problems of traditional viscosity measurement equipment being bulky, complex, difficult to deploy on-site, having low detection accuracy, and being highly sensitive to external environmental conditions, this invention proposes a liquid viscosity detection device. By building an experimental platform, it obtains contour feature data of the droplet growth process of liquids of different viscosities under the same conditions. Combining soft measurement technology with an improved support vector machine regression method, it trains and identifies the kinematic viscosity of the target liquid. This allows for the detection and control of the production process using machine vision technology, achieving online viscosity monitoring. This method utilizes machine vision technology for non-contact detection of liquid viscosity, facilitating installation in industrial settings and achieving high recognition accuracy within a certain viscosity range, meeting the requirements of precision, simplicity, speed, and efficiency in online detection scenarios.

[0004] This invention relates to a liquid viscosity testing device, comprising an adjustable horizontal base 1, an LED backlight source 2, a bracket 3, an atmospheric pressure liquid supply device 4, a bubble generating device 5, a solution collection tank 6, a controller 7, a CCD high-speed camera 8, and a host PC 9.

[0005] The adjustable horizontal base 1 platform is fixedly installed from left to right with an LED backlight source 2, a bubble generator 5, a solution collection tank 6, a bracket 3, and a CCD high-speed camera 8. An atmospheric pressure liquid supply device 4 is installed on the bracket 3. The solution collection tank 6 is fixedly installed on the platform below the atmospheric pressure liquid supply device 4. The controller 7 is installed above the CCD high-speed camera 8. The atmospheric pressure liquid supply device 4 and the bubble generator 5 are connected to the controller 7 through communication cables. The host PC 9 is installed on the side of the entire device. The CCD high-speed camera 8 and the controller 7 are connected to it through communication cables.

[0006] The adjustable leveling base 1 includes an adjustable foot pad 111, a platform 112, and a level 113; the adjustable foot pad 111 is installed at the bottom of the platform 112, and the level 113 is installed on the upper surface of the platform 112.

[0007] The atmospheric pressure liquid supply device 4 includes a storage tank 411, a supply tank 412, a supply port 413, a regulating valve 414, an overflow port 415, a detachable capillary drip port 416, a pressurized drain valve 417, and a liquid level sensor 418. The supply tank 412 is connected to the lower left of the storage tank 411 via a pipe. The regulating valve 414 is installed in the pipe of the supply port 413. The supply port 413 and the overflow port 415 are respectively located at a certain height on both sides of the tank wall of the supply tank 412, with the overflow port 415 forming a downward mechanical angle of 45 degrees with the tank wall. The detachable capillary drip port 416 is vertically installed at the bottom of the supply tank 412. The pressurized drain valve 417 is located directly above the supply tank 412 and is fixedly installed outside the storage tank 411. The controller 7 is connected to the regulating valve 414, the liquid level sensor 418, and the pressurized drain valve motor via a communication cable.

[0008] The bubble generating device 5 includes a transparent liquid storage tank 511, a microfluidic pump 512, and a bubble generating tube 513; the bubble generating tube is installed inside the transparent liquid storage tank 511; the microfluidic pump 512 is installed on the top of the transparent liquid storage tank 511 and is connected to the bubble generating tube 513 by a flexible hose, and the microfluidic pump 512 is connected to the controller 7 through a communication cable.

[0009] The beneficial effects of this invention are: by building a detection device to control the generation process of solution droplets and bubbles in the solution and to collect their video images, this invention solves the technical problems of traditional viscosity detection devices being bulky, having poor real-time performance, and being difficult to achieve online measurement. It improves the accuracy and real-time performance of online viscosity detection in industrial scenarios, and better integrates the processing, detection, and control processes. Attached Figure Description

[0010] Figure 1 This is a system diagram of a liquid viscosity detection device according to the present invention.

[0011] Figure 2 This is a schematic diagram of an atmospheric pressure liquid supply device for a liquid viscosity detection device according to the present invention.

[0012] Figure 3 This is a schematic diagram of a bubble generation device in a liquid viscosity detection apparatus according to the present invention. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0014] In the description of this invention, it should be noted that the terms "top," "bottom," "one side," "the other side," "front," "rear," "middle part," "inner," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0015] like Figure 1The liquid viscosity detection device shown includes an adjustable horizontal base 1, an LED backlight source 2, a bracket 3, an atmospheric pressure liquid supply device 4, a bubble generator 5, a solution collection tank 6, a controller 7, a CCD high-speed camera 8, and a host PC 9. The adjustable horizontal base 1 has the LED backlight source 2, bubble generator 5, solution collection tank 6, bracket 3, and CCD high-speed camera 8 fixedly installed from left to right on its platform. The height of the three adjustable feet 111 is adjusted by observing the level 113 on the adjustable horizontal base 1 to ensure the platform 112 remains horizontal. The light emitted by the LED beads of the LED backlight source 2 is transformed into a uniformly emitting surface light source through a rectangular diffuse reflector plate, thereby improving the quality of image acquisition. The light passes through the bubble generating device 5 and the atmospheric pressure liquid supply device 4, and is imaged on the CCD image sensor of the CCD high-speed camera 8. By adjusting the focal length of the CCD high-speed camera 8, video images of the droplet growth process and the bubble growth process in the solution of different viscosities are obtained. The controller 7 is installed on the CCD high-speed camera 8. The atmospheric pressure liquid supply device 4 and the bubble generating tank 5 are connected to the controller 7 through communication cables to control the video data acquisition process. The controller 7 is a programmable logic controller. The host PC 9 is installed on the side of the entire device. The CCD high-speed camera 8 and the controller 7 are connected to it through communication cables. It plays a central control role in the entire system and processes, analyzes and identifies the solution viscosity of the acquired video image data.

[0016] like Figure 2The atmospheric pressure liquid supply device of the droplet video image acquisition device shown includes a storage tank 411, a supply tank 412, a supply port 413, a regulating valve 414, an overflow port 415, a detachable capillary nozzle 416, a pressurized drain valve 417, and a level sensor 418. The supply tank 412 is connected to the lower left of the storage tank 411 via a pipe. Under the action of gravity, the solution in the storage tank 411 is continuously supplied to the supply tank 412 through the supply port 413, and excess liquid overflows from the overflow port 415. The supply port 413 and overflow port 415 are respectively located at a certain height on both sides of the supply tank 412. The overflow port 415 is inclined downward at a mechanical angle of 45 degrees to the tank wall. The droplet generation frequency is related to the height from the overflow port 415 to the detachable capillary nozzle 416. By extracting the image features of the shape change over time of axisymmetric droplets formed by vertically downward capillary nozzles from solutions of different viscosities at the same liquid level, from formation to breakage, the law of droplet contour feature change can be analyzed. The detachable capillary nozzle 416 is vertically installed on the supply tank 412. At the bottom of the liquid tank 412, the viscosity measurement range can be changed by replacing capillary nozzles of different diameters. The liquid level sensor 418 is installed inside the cavity of the liquid supply tank 412. It detects the liquid level in the liquid supply tank 412 to adjust the opening of the regulating valve 414, thereby controlling the liquid supply flow rate at the liquid supply port 413. The regulating valve 414 is installed in the pipe of the liquid supply port 413. When the detection begins, the regulating valve 414 is fully open, and the liquid level in the liquid supply tank 412 rises rapidly. The opening of the regulating valve 414 is adjusted according to the rise in liquid level monitored by the liquid level sensor 418. The speed gradually decreases. When the liquid level reaches the height of the overflow port 415, the supply port 413 supplies liquid to the supply tank 412 at a speed slightly greater than the flow rate of the detachable capillary nozzle 416 to reduce the loss of the test solution. The pressurized drain valve 414 is located directly above the supply tank 412 and is fixedly installed outside the storage tank 411. After the video acquisition ends, the regulating valve 414 is adjusted to drain the solution in the storage tank 411 at its maximum opening and then closed. The motor of the pressurized drain valve 417 is started to help empty the remaining solution in the supply tank 412 so as to quickly start the next measurement.

[0017] like Figure 3 The bubble generation device of the droplet video image acquisition device shown includes a transparent liquid storage tank 511, a microfluidic pump 512, and a bubble generation tube 513. The microfluidic pump 512 is installed on the top of the transparent liquid storage tank 511 and connected to the bubble generation tube 513 by a flexible tube. The microfluidic pump 512 injects air into the transparent liquid storage tank filled with the solution to be tested at a constant speed, so that bubbles are slowly and steadily generated at the end of the bubble generation tube. The bubble generation tube 513 is vertically installed in the transparent liquid storage tank 511. By extracting the image features of the bubble shape changing over time in the process of generating bubbles with a constant flow rate of air in the bubble generation tube 513 of the same pore size in solutions of different viscosities, the relationship between its contour features and solution viscosity can be analyzed and learned.

Claims

1. A liquid viscosity detection device, characterized in that... The device includes an adjustable horizontal base (1), an LED backlight source (2), a bracket (3), an atmospheric pressure liquid supply device (4), a bubble generator (5), a solution collection tank (6), a controller (7), a CCD high-speed camera (8), and a host PC (9). The adjustable horizontal base (1) is fixedly installed from left to right with the LED backlight source (2), the bubble generator (5), the solution collection tank (6), the bracket (3), and the CCD high-speed camera (8). The atmospheric pressure liquid supply device (4) is installed on the bracket (3). The solution collection tank (6) is fixedly installed on the platform below the atmospheric pressure liquid supply device (4). The controller (7) is installed above the CCD high-speed camera (8). The regulating valve of the atmospheric pressure liquid supply device (4) and the bubble generator (5) are connected to the controller (7) through communication cables. The host PC (9) is installed on the side of the entire device. The CCD high-speed camera (8) and the controller (7) are connected to it through communication cables.

2. The liquid viscosity detection device according to claim 1, characterized in that... The atmospheric pressure liquid supply device (4) includes a storage tank (411), a supply tank (412), a supply port (413), a regulating valve (414), an overflow port (415), a detachable capillary drip port (416), a pressurized drain valve (417), and a liquid level sensor (418). The supply tank (412) is connected to the lower left of the storage tank (411) via a pipe. The regulating valve (414) is installed in the pipe of the supply port (413). The supply port (413) and the overflow port (415) are separate. The overflow port (415) is located at a certain height on both sides of the wall of the liquid supply tank (412), and the overflow port (415) is inclined downward at a mechanical angle of 45 degrees to the wall of the tank. The detachable capillary drip port (416) is vertically installed at the bottom of the liquid supply tank (412). The pressurized drain valve (417) is located directly above the liquid supply tank (412) and is fixedly installed outside the liquid storage tank (411). A liquid level sensor (418) is installed in the cavity of the liquid storage tank (411), and a regulating valve (414) is installed in the pipe of the liquid supply port (413).

3. A liquid viscosity detection device according to claim 2, characterized in that... The controller (7) is connected to the regulating valve (414), the liquid level sensor (418), and the pressurized drain valve motor via a communication cable.

4. A liquid viscosity detection device according to claim 1, characterized in that... The bubble generating device (5) includes a transparent liquid storage tank (511), a microfluidic pump (512), and a bubble generating tube (513); the bubble generating tube (513) is installed inside the transparent liquid storage tank (511); the microfluidic pump (512) is installed on the top of the transparent liquid storage tank (511) and connected to the bubble generating tube (513) by a flexible tube, and the microfluidic pump (512) is connected to the controller (7) through a communication cable.

5. A liquid viscosity detection device according to claim 1, characterized in that... The adjustable level base (1) includes an adjustable foot pad (111), a platform (112), and a level (113); the adjustable foot pad (111) is installed at the bottom of the platform (112), and the level (113) is installed on the upper surface of the platform (112).

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