Coagulation floc image acquisition system for experiment

Abstract

The invention discloses a coagulation floc image acquisition system for experiments, which comprises a working table and a subsystem, a pipeline pull rod (44) is fixedly connected with the working table, a circulating water pump (5) is arranged in a bottom water tank (22), the bottom water tank (22) is placed on a lower plate surface (2) of the working table, a medicament water tank (11) is arranged on an upper plate surface (1) of the working table, and a first stirrer (12) is arranged at the top of the medicament water tank (11); the mixing water tank (14) is arranged on the upper plate face of the workbench, a second stirrer (13) is arranged on the top of the mixing water tank (14), the mixing water tank (14) is fixedly connected with the water passing corridor (15), and the image collecting water tank (16) is arranged on the upper plate face (1) of the workbench and fixedly connected with the water passing corridor (15). The problems that in the prior art, a floc image is greatly influenced by ambient light, large-area overexposure cannot be used, floc evaluation dimensionality is reduced, reliability is lowered, image acquisition efficiency is low, reliability is lowered, image quality is poor, decision errors made by a machine are large, and intermittent work can only be achieved are solved.

Description

Technical Field

[0001] The invention relates to the field of image acquisition systems, in particular to a coagulation floc image acquisition system used in experiments. Background Art

[0002] With the development of the water treatment industry, the traditional method of manually adding coagulants has gradually been replaced by automated operations, and intelligent control based on machine vision is a hot topic of research today.

[0003] The use of machine vision technology to achieve automatic coagulant addition requires a large number of high-quality coagulation floc images to establish a data set in order to carry out research on related image recognition algorithms. However, there is currently no public coagulation floc image data set, and the differences in water quality and water treatment processes will result in the coagulation floc data set not being universal. This requires universities and water plants that want to carry out related research to have a coagulation floc image acquisition system for experiments. The existing floc image acquisition methods often have uncontrollable light and large background interference, resulting in blurred contours, missing textures, and severe background interference in the collected floc images, which brings many difficulties to image preprocessing and affects the reliability of the data set.

[0004] Technical solution of prior art 1

[0005] Currently, there is no dedicated coagulation floc image acquisition system for experiments. Universities and water plants usually take floc images directly at the coagulation test mixing station.

[0006] Basic principle: The effect of water treatment depends largely on the coagulation effect, which can be evaluated by the flocs produced after the coagulation stage. The traditional method relies on the workers' experience, observes the floc properties and subjectively judges the coagulation effect, and controls the dosage of coagulants. Due to its many defects, it is gradually replaced by automatic control dosing (such as PID, cascade, mathematical models, etc.). Today's research hotspot is to use machine vision (including image processing) to automatically extract the features of floc images and evaluate the coagulation effect, and then adjust the dosage to achieve intelligent control (different from automatic control, which means that the machine does not know whether the effect is good or not, and still requires human decision-making participation, while intelligent control is that the machine completely replaces people in making decisions). The dosage of coagulant is an important part of building a "smart water plant".

[0007] Table 1 General indicators for evaluating flocs

[0008]

[0009] Disadvantages of the prior art 1

[0010] Since the coagulation test mixing station is not specially designed for floc image acquisition, there are many defects in image acquisition.Figures 1 to 7 For example, the designs of concrete test mixing plants from different manufacturers may differ, but the defects are similar.

[0011] Summary of defects of the existing technical solution "direct collection of coagulation floc images at the coagulation test mixing station":

[0012] Since light is only provided at the bottom of the beaker and is uneven and uncontrollable, a large area of ​​the floc image is overexposed and cannot be used.

[0013] Light is only provided at the bottom of the beaker and cannot penetrate the thick flocs, resulting in only outlines but no textures in the overhead image, which reduces the floc evaluation dimensions (indicators) and reduces reliability.

[0014] The mixing station cannot provide a clean, tidy, and evenly lit background, causing background interference and affecting floc identification.

[0015] The beaker is a cylinder. Due to the refraction of light, the flocs at the edge are deformed. The image of this part of the flocs cannot reflect the true properties and cannot be used, resulting in low image acquisition efficiency and reduced reliability.

[0016] Due to the above reasons, in order to improve image quality, it is necessary to shoot from two angles: the front and the top, which directly increases the workload, and often the image quality is poor while the workload is large.

[0017] Poor image quality means poor quality of the established data set, which reduces the accuracy of recognition and leads to large errors in the decision-making of the machine. One of the current difficulties in research is that when the particle size of flocs is reduced to a certain level, they cannot be recognized because the image quality is too poor. In this case, no matter how much noise reduction or stacking algorithms are used, it is useless. Summary of the invention

[0018] In order to solve the above technical problems, the present invention provides a concrete floc image acquisition system for experiments, which solves the problems in the prior art that floc images are overexposed over a large area and cannot be used, the floc evaluation dimensions are reduced and the reliability is reduced, the image acquisition efficiency is low and the reliability is reduced, the image quality is poor, the decision errors made by the machine are large, and it can only work intermittently.

[0019] The technical solution provided by the present invention is as follows:

[0020] It is recommended that the system be used in a dimly lit room ("darkroom") to achieve the best image quality.

[0021] A coagulation floc image acquisition system for experiments, comprising a workbench and subsystems, wherein the subsystems include a water tank system, a water supply system, a dosing system, and a lighting and acquisition system; the water tank system includes: a reagent water tank, a mixing water tank, a water corridor, an image acquisition water tank, a connecting valve, a bottom water tank, a sedimentation cylinder, and an agitator; the water supply system includes: a circulating water pump, a PVC pipe, a 90° elbow, and a flow meter; the dosing system includes: a metering pump and a rubber hose; the lighting and acquisition system includes: a constant light, a light stand, a sulfuric acid paper background, a background stand, a desktop sulfuric acid paper, a computer, a camera, a tripod, an acquisition card, and a polarizer; the constant light includes a first constant light and a second constant light;

[0022] A circulating water pump is provided inside the bottom water tank, the bottom water tank is placed on the lower plate surface of the workbench, the pharmaceutical water tank is arranged on the upper plate surface of the workbench and a first agitator is arranged on the top, the mixing water tank is arranged on the upper plate surface of the workbench and a second agitator is arranged on the top, the mixing water tank is fixedly connected to the water passage corridor, the mixing water tank is placed on a pad to form a height difference, the image acquisition water tank is arranged on the upper plate surface of the workbench and fixedly connected to the water passage corridor, and is fixedly connected to the mixing water tank through a connecting valve, the water passage corridor has a slope and a water retaining weir is provided at one end adjacent to the image acquisition water tank, the sedimentation cylinder is non-fixedly arranged on the ground, the circulating water pump is overheadly arranged inside the bottom water tank, the metering pump is non-fixedly arranged on the upper plate surface of the workbench, the second permanent lamp is non-fixedly arranged on the light source bracket, the first permanent lamp is fixedly arranged on the lamp bracket and is located on one side of the sulfuric acid paper background, the desktop sulfuric acid paper is non-fixedly laid flat on the upper plate surface of the workbench, and the sulfuric acid paper background is fixedly rolled on the background rack.

[0023] Preferably, the first permanent light and the second permanent light are used to adjust background brightness and color.

[0024] Preferably, the bottom plates of the bottom water tank, the medicine water tank, the mixing water tank, and the image acquisition water tank are not horizontal but have a slope and are all provided with valves.

[0025] Preferably, the mixing water tank is placed on the pad to form a height difference, ensuring that in the intermittent working mode, the water flow can smoothly flow to the image acquisition water tank under the action of gravity.

[0026] Preferably, the circulating water pump is placed overhead inside the bottom water tank to lift water without blocking the inlet of the drain valve of the bottom water tank.

[0027] Preferably, the sedimentation cylinder is non-fixedly placed on the ground to receive the water released from the image acquisition water tank.

[0028] Preferably, the metering pump is non-fixedly placed on the upper surface of the workbench to accurately meter the amount of the pumped liquid coagulant.

[0029] Preferably, the surface of the image acquisition water tank has a hydrophobic film to prevent residual water stains on the surface of the tank from interfering with shooting.

[0030] Preferably, a polarizing filter is installed in front of the camera lens to reduce the interference of ambient light and improve the adaptability of the system.

[0031] The technical effects of the coagulation floc image acquisition system used in the experiment of the present invention are as follows:

[0032] 1. The present invention has two modes of continuous operation and intermittent operation, which can be switched by connecting valves.

[0033] 2. The present invention can capture the hydrophobic film on the surface of the water tank through images, without residual water stains causing interference, while reducing the difficulty of manual cleaning and facilitating use.

[0034] 3. The present invention can reduce the water flow velocity through the water retaining weir of the water corridor and alleviate the impact on the flocs.

[0035] 4. The present invention can overcome the problem of floc image distortion through a rectangular parallelepiped image acquisition water tank.

[0036] 5. The present invention can provide a clean background and reduce background interference through the sulfuric acid paper background and the constant light.

[0037] 6. The present invention can combine desktop sulfuric acid paper and a constant light to ensure that the collected floc image has clear contours, complete details, and fine texture.

[0038] 7. The present invention can ensure high quality of the image by only taking a frontal picture of the flocs through uniform and controllable lighting at multiple angles and a clean background, without the need to take a picture from the top, thus reducing the workload.

[0039] 8. The present invention can directly change the brightness and color of the paper background and the desktop paper by adjusting the brightness and color of the first and second lights, so that researchers can adjust the background that best suits the actual scene and obtain the best effect.

[0040] 9. The present invention can provide high-quality floc images, reduce the difficulty of image preprocessing, and increase the reliability of data sets and recognition accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a physical picture of the coagulation test mixing station of the present invention.

[0042] Figure 2 This is an overexposed image of the present invention.

[0043] Figure 3 The flocs image is taken when the light is insufficient according to the present invention.

[0044] Figure 4 This is the background interference diagram of the present invention.

[0045] Figure 5 This is the background interference diagram for fine flocs of the present invention.

[0046] Figure 6 This is a diagram showing the distortion of the edge portion caused by the cylindrical refraction of light in the present invention.

[0047] Figure 7 This is the effect achieved by the studio constant light + sulfuric acid paper background of the present invention. Changing the light brightness and color can change the background brightness and color map.

[0048] Figure 8 It is an axonometric diagram of the experimental system of the present invention.

[0049] Fig. 9 It is a schematic diagram of a workbench of the present invention.

[0050] Fig.10 It is three views of the workbench of the present invention.

[0051] Fig.11 It is a schematic diagram of a water tank system of the present invention.

[0052] Fig.12 It is three views of the pharmaceutical water tank of the present invention.

[0053] Fig.13 It is three views of the mixing water tank of the present invention.

[0054] Fig.14 These are three views of the water corridor of the present invention.

[0055] Fig.15 This is the three-view drawing of the water tank for image acquisition of the present invention.

[0056] Fig.16 It is three views of the bottom water tank of the present invention.

[0057] Fig.17 It is a schematic diagram of the water supply system of the present invention.

[0058] Fig.18 It is three views of the water supply system of the present invention.

[0059] Fig.19 It is a schematic diagram of the dosing system of the present invention.

[0060] Fig. 20 It is three views of the dosing system of the present invention.

[0061] Fig.21 It is a schematic diagram of the illumination and collection system of the present invention.

[0062] Figure numerals: 1-upper plate, 2-lower plate, 3-tempered glass, 4-light source bracket, 5-circulating water pump, 6-PVC pipe, 7-90° elbow, 8-flow meter, 9-metering pump, 10-rubber hose, 11-pharmaceutical water tank, 12-first agitator, 13-second agitator, 14-mixing water tank, 15-water corridor, 16-image acquisition water tank, 18-first PVC pipe, 19-first faucet, 20-second PVC pipe, 21-second faucet, 22-bottom water tank, 23-third PVC pipe, 24-third faucet, 25-first constant light, 26-sulfuric acid paper background, 27-background stand, 28-second constant light, 29-desktop sulfuric acid paper, 30-computer, 31-tripod, 32-camera, 40-light stand, 42-sedimentation cylinder, 43-connecting valve, 44-pipeline pull rod, 45-pad. DETAILED DESCRIPTION

[0063] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0064] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0065] See also Figures 8 to 21 The present invention provides a coagulation floc image acquisition system for experiments, including a workbench, a water supply system, a dosing system, a lighting system, a collection system, and a water tank system.

[0066] The upper panel 1 of the workbench is provided with an opening for installing tempered glass 3 that can transmit light. The lower panel 2 of the workbench is provided with a pipe pull rod 44 for providing support for the pipes of the water supply system. The bottom of the upper panel 1 of the workbench is fixedly connected to the light source bracket 4 by screws for placing the second permanent lamp 28. The workbench is provided with a lower panel 2 for placing the bottom water tank 22.

[0067] The subsystem includes a water tank system, a water supply system, a dosing system, and a lighting and collection system. The water tank system holds water for the entire experimental system, including: a bottom water tank 22, a reagent water tank 11, a stirrer 12, a mixing water tank 14, a stirrer 13, a water corridor 15, an image collection water tank 16, a connecting valve 43, and a pad 45; the water supply system is responsible for lifting water, including: a circulating water pump 5, a flow meter 8, a 90° elbow 7, and a PVC pipe 6; the dosing system is responsible for lifting coagulant agents, including: a metering pump 9 and a rubber hose 10; the lighting and collection system is responsible for providing light for the flocs and collecting floc images, including: a constant light 25, a light stand 40, a constant light 28, a background stand 27, a sulfuric acid paper background 26, a desktop sulfuric acid paper 29, a tripod 31, a camera 32, a collection card, and a computer 30.

[0068] A circulating water pump 5 is provided inside the bottom water tank 22 to transport water in the water tank to the mixing water tank 14 . The bottom water tank 22 is placed on the lower plate surface 2 of the workbench 1 .

[0069] The reagent water tank 11 is placed on the upper plate surface 1 of the workbench and a stirrer 12 is provided on the top to mix the solid coagulant and water to form a liquid coagulant.

[0070] The mixing water tank 14 is placed on the upper plate surface 1 of the workbench and placed on the pad 45 and is provided with an agitator 13 on the top to mix the liquid coagulant and water. The mixing water tank 14 is fixedly connected to the water corridor 15 to transport water to the image acquisition water tank 16. The mixing water tank 14 is fixedly connected to the connecting valve 43 to transport water to the image acquisition water tank 16.

[0071] The surface of the image acquisition water tank 16 has a hydrophobic film to prevent residual water stains from interfering with shooting. It is placed on the upper plate surface 1 of the workbench and is fixedly connected to the water corridor 15 to receive water transported from the mixing water tank 14. The water corridor 15 has a slope and is adjacent to the end of the image acquisition water tank 16. A water retaining weir plate 41 is provided to slow down the water flow speed and reduce damage to the flocs.

[0072] The circulating water pump 5 is placed overhead inside the bottom water tank 22 to lift water without blocking the inlet of the drain valve of the bottom water tank 22 .

[0073] The sedimentation cylinder 42 is placed on the ground in a non-fixed manner to receive the water released from the image acquisition water tank 16 .

[0074] The metering pump 9 is non-fixedly placed on the upper plate surface 1 of the workbench and is used to accurately meter the amount of the pumped liquid coagulant.

[0075] The second permanent light 28 is non-fixedly mounted on the light source bracket 4, illuminating the flocs from the bottom of the image acquisition water tank 16, and the light is transmitted through the desktop sulfuric acid paper 29 to provide texture details of the floc image; the second permanent light 28 is fixedly mounted on the light bracket 40 and is located behind the sulfuric acid paper background, illuminating the flocs from directly behind the image acquisition water tank 16, and the light is transmitted through the sulfuric acid paper background 26 to provide a clear outline and clean background of the floc image. The first permanent light 25 and the second permanent light 28 can adjust the brightness and color to facilitate researchers to adjust according to the actual site light.

[0076] The desktop sulphate paper 29 is laid flat on the upper plate surface 1 of the workbench in an unfixed manner, and the light of the second permanent lamp 28 is evenly and softly distributed on the horizontal plane. The sulphate paper background 26 is fixedly rolled on the background frame 27, and the light of the first permanent lamp 25 is evenly and softly distributed on the vertical plane.

[0077] The bottom plates of the bottom water tank 22, the medicine water tank 11, the mixing water tank 14 and the image acquisition water tank 16 are not horizontal but have a slope and are all provided with valves. This design makes it easy to empty the containers without water accumulation when the containers are emptied.

[0078] A polarizing filter is installed in front of the camera 32 lens to reduce the interference of ambient light. This design makes the experimental system more adaptable and can capture good quality floc images even if there is no separate closed small room.

Claims

1. A coagulation floc image acquisition system for experiments, characterized in that: It comprises a workbench and a subsystem, wherein the subsystem comprises a water tank system, a water supply system, a dosing system, and a lighting and acquisition system; the water tank system comprises: a reagent water tank (11), a mixing water tank (14), a pad (45), a water passage corridor (15), an image acquisition water tank (16), a bottom water tank (22), a sedimentation cylinder (42), a first agitator (12), and a second agitator (13); the water supply system comprises: a circulating water pump (5), a PVC pipe (6), a 90° elbow (7), and a flow meter (8); the dosing system comprises: a metering pump (9), a rubber hose (10); the lighting and acquisition system comprises: a constant light, a light stand (40), a sulfuric acid paper background (26), a background stand (27), a desktop sulfuric acid paper (29), a computer (30), a camera (32), a tripod (31), an acquisition card, and a polarizer; the constant light comprises a first constant light (25) and a second constant light (28); A circulating water pump (5) is provided inside the bottom water tank (22), the bottom water tank (22) is placed on the lower plate surface of the workbench, the medicine water tank (11) is arranged on the upper plate surface of the workbench and a first stirrer (12) is arranged on the top, the mixing water tank (14) is arranged on the upper plate surface of the workbench and a second stirrer (13) is arranged on the top, the mixing water tank (14) is fixedly connected to the water passage corridor (15), the mixing water tank (14) is fixedly placed on the pad (45), the image acquisition water tank is arranged on the upper plate surface of the workbench and fixedly connected to the water passage corridor (15), the image acquisition water tank (16) has a hydrophobic film on its body surface, and the water passage corridor (15) has A water retaining weir is provided at one end of the slope and adjacent to the image acquisition water tank, the sedimentation cylinder (42) is non-fixedly arranged on the ground, the circulating water pump (5) is overheadly arranged inside the bottom water tank (22), the metering pump (9) is non-fixedly arranged on the upper surface of the workbench, the second permanent light (28) is non-fixedly arranged on the light source bracket (4), the first permanent light (25) is fixedly arranged on the lamp bracket (40) and is located on one side of the sulfuric acid paper background (26), the desktop sulfuric acid paper (29) is non-fixedly laid flat on the upper surface of the workbench, the sulfuric acid paper background (26) is fixedly rolled on the background bracket (27), and the polarizing filter is fixedly installed in front of the camera (32) lens.

2. The coagulation floc image acquisition system for experiments according to claim 1 is characterized in that: The first permanent light (25) and the second permanent light (28) are used to adjust background brightness and color.

3. The coagulation floc image acquisition system for experiments according to claim 1 is characterized in that: The bottom plates of the bottom water tank (22), the medicine water tank (11), the mixing water tank (14), and the image acquisition water tank (16) are not horizontal but have a slope and are all provided with valves.

4. The coagulation floc image acquisition system for experiments according to claim 1 is characterized in that: The circulating water pump (5) is placed overhead inside the bottom water tank (22) to pump water without blocking the inlet of the drain valve of the bottom water tank (22).

5. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The sedimentation cylinder (42) is non-fixedly placed on the ground and is used to receive water released from the image acquisition water tank (16).

6. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The metering pump (9) is non-fixedly placed on the upper surface of the workbench and is used to accurately meter the amount of the pumped-in liquid coagulant.

7. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The connecting valve (43) connects the mixing water tank (14) and the image acquisition water tank (16) and is used to control the working mode of the system, that is, to switch between the continuous working mode and the intermittent working mode.

8. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The first agitator (12) and the second agitator (13) are both intelligent agitators, which are used to set their stirring time and rotation speed to accurately control the G value and GT value in the coagulation stage.

9. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The mixing water tank (14) is placed on a pad (45) to form a height difference, so that water can flow to the image acquisition water tank (16) by gravity when used in an intermittent working mode.

10. The coagulation floc image acquisition system for experiments according to claim 1, characterized in that: The image acquisition water tank (16) has a hydrophobic film on its surface to prevent residual water stains from interfering with the shooting; The polarizing filter is fixedly mounted in front of the lens of the camera (32) to reduce the interference of ambient light, so as to facilitate the situation where the on-site conditions are insufficient.

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