Flow measuring device

Abstract

The utility model provides a flow measuring device, which belongs to the technical field of micro flow measurement, and particularly comprises an acquisition cavity, an image acquisition device and a drainage catheter, the collection cavity is arranged on the working platform; the drainage catheter is arranged on the collection cavity, and the drainage catheter is used for enabling the outflow liquid drops to drop into the collection cavity; the image acquisition device is used for shooting and acquiring information of liquid drops flowing out of the outlet of the drainage catheter. The flow measuring device comprises an acquisition cavity, an image acquisition device and a drainage catheter, the acquisition cavity is arranged on a working platform, the drainage catheter is arranged on the acquisition cavity, the image acquisition device is used for shooting information of liquid drops flowing out of an outlet of the drainage catheter, and flow information of the drainage catheter can be obtained through the liquid drop information. In the information collecting process of the image collecting device, as long as liquid drops drop, even if the flow is as low as 1ml / h, photographing can be carried out to collect information, and measurement of micro flow is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of micro-flow measurement, and in particular to a flow measurement device. Background Art

[0002] As the demand for products in industries such as semiconductor manufacturing, medical chemicals, and bioengineering continues to develop in the direction of precision and miniaturization, the measurement of micro-flow rates of fluids below 1 ml / h is becoming a basic condition for chip-based products, such as microfluidic chips, micro-dispensing, drug injection, insulin pumps, etc. At present, the existing micro-liquid flow measurement usually adopts float type, differential pressure type, volumetric type and other methods, but these methods are difficult to measure micro-flow rates as low as 1 ml / h. Therefore, a device that can measure micro-flow rates is urgently needed. Summary of the invention

[0003] The purpose of the present application is to provide a flow measurement device, aiming to solve the problem in the related art that it is inconvenient to measure when the liquid flow rate is as low as 1 ml / h.

[0004] Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

[0005] According to a first aspect of the present application, a flow measurement device is provided, comprising:

[0006] Collection cavity, image acquisition device, drainage catheter;

[0007] The collection cavity is arranged on a working platform;

[0008] The drainage catheter is arranged on the collection cavity, and the drainage catheter is used for the outflowing liquid droplets to fall into the collection cavity;

[0009] The image acquisition device is configured to capture and acquire information on liquid droplets flowing out from the outlet of the drainage catheter.

[0010] In an exemplary embodiment of the present application, a backlight light source is further included. The backlight light source is arranged corresponding to the image acquisition device. The backlight light source is arranged to emit light toward the collection cavity. The light emitted by the backlight light source is used to illuminate the outlet position of the drainage catheter.

[0011] In an exemplary embodiment of the present application, one of the image acquisition devices and the backlight light source arranged corresponding thereto form an information acquisition device for collecting droplet contour information, and the information acquisition device is provided in multiple groups.

[0012] In an exemplary embodiment of the present application, a light isolation plate is further included, and the light isolation plate is arranged between adjacent information collection devices.

[0013] In an exemplary embodiment of the present application, the light isolation plate is covered with an anti-reflection coating.

[0014] In an exemplary embodiment of the present application, the collection cavity is in the shape of a hexagonal prism, and the information collection devices are provided in three groups, wherein each group of the information collection devices is respectively provided on two opposite sides of the hexagonal prism-shaped collection cavity.

[0015] In an exemplary embodiment of the present application, a hydrophobic agent is coated on the outer circumference of the outlet of the drainage catheter.

[0016] In an exemplary embodiment of the present application, a constant temperature and humidity glass cover is further included, and the cover is arranged on the outside of the flow measurement device.

[0017] In an exemplary embodiment of the present application, the working platform is a vibration-isolating optical platform, and the flow measurement device is arranged on the vibration-isolating optical platform.

[0018] In an exemplary embodiment of the present application, the image acquisition device is an industrial area array camera.

[0019] The exemplary embodiments of the present application may have some or all of the following beneficial effects:

[0020] The flow measurement device provided in the example implementation mode of the present application includes a collection cavity, an image collection device, and a drainage catheter, wherein the collection cavity is arranged on a work platform, the drainage catheter is arranged on the collection cavity, and the image collection device is used to capture information of droplets flowing out from the outlet of the drainage catheter, and the flow information of the drainage catheter can be obtained through the droplet information. During the process of collecting information by the image collection device, as long as there are droplets falling, even if the flow rate is as low as 1 ml / h, it is possible to take pictures and collect information to achieve the measurement of tiny flow rates.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a flow measurement device in an embodiment of the present application is shown;

[0024] Figure 2 A top view of a flow measurement device in an embodiment of the present application is shown;

[0025] Figure 3 A schematic diagram of the structure of a flow measurement device in an embodiment of the present application with a constant temperature and humidity glass cover is shown.

[0026] Description of reference numerals:

[0027] 1. Vibration isolation optical platform; 2. Industrial area array camera; 3. Telecentric lens; 4. Drainage catheter; 5. Collection cavity; 6. Light isolation plate; 7. Backlight source; 8. Syringe pump; 9. Constant temperature and humidity glass cover. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present application and are not necessarily drawn to scale.

[0029] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the diagram to another component, these terms are used in this specification only for convenience, such as according to the direction of the examples in the drawings. It is understood that if the device of the diagram is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0030] The terms "a", "an", "the" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc.; the terms "first" and "second" are used merely as labels and are not intended to limit the quantity of their objects.

[0031] Example

[0032] This embodiment provides a specific implementation of the flow measurement device, such as Figure 1 and Figure 2As shown, it includes a collection cavity 5, an image collection device, and a drainage catheter 4, wherein the collection cavity 5 is arranged on a working platform, and the drainage catheter 4 is arranged on the collection cavity 5. The image collection device is used to photograph the droplet information flowing out from the outlet position of the drainage catheter 4, and the flow information of the drainage catheter 4 can be obtained through the droplet information. During the process of collecting information by the image collection device, as long as there are droplets falling, even if the flow rate is as low as 1 ml / h, it is possible to take pictures and collect information to achieve the measurement of tiny flow.

[0033] In this embodiment, a backlight source 7 is further included. The backlight source 7 is arranged corresponding to the image acquisition device. The backlight source 7 is arranged to emit light toward the collection cavity 5. The light emitted by the backlight source 7 is used to illuminate the outlet position of the drainage catheter 4. The backlight source 7 can illuminate the shooting position of the industrial area array camera 2, so that the image acquisition device can better collect information about the dripping droplets at the outlet position of the drainage catheter 4.

[0034] Furthermore, an image acquisition device and a backlight source 7 corresponding thereto form a group of information acquisition devices, and multiple groups of information acquisition devices are provided. The backlight source 7 of each group of information acquisition devices is provided corresponding to the industrial area array camera 2, so that the backlight source 7 can illuminate the shooting position of the industrial area array camera 2 to collect information on dripping droplets at the outlet position of the drainage catheter 4.

[0035] In this embodiment, a light isolation plate 6 is provided between each group of information collection devices. The light isolation plate 6 can prevent the backlight source 7 in two adjacent groups of information collection devices from affecting the industrial area array camera 2 next door; further, the surface of the light isolation plate 6 is covered with an anti-reflective coating to further reduce the interference of excess light, so that multiple groups of information collection devices can collect droplet contours from different directions at the same time.

[0036] In this embodiment, Figure 1 and Figure 2 As shown, the collection cavity 5 is in the shape of a hexagonal prism, and there are three groups of information collection devices, wherein each group of information collection devices is respectively arranged on two opposite sides of the hexagonal prism-shaped collection cavity 5. The three groups of information collection devices have a total of 6 image collection devices and backlight light sources 7, which are respectively located on the six sides of the hexagonal prism-shaped collection cavity 5. A through hole is reserved on each side for the light provided by the backlight light source 7 to pass through and for the image collection device to collect the shape of the droplet through the through hole. The light baffle extends into the interior of the collection cavity 5 but does not intersect together, leaving space for the light path of each group of information collection devices.

[0037] In some other embodiments, the collection cavity 5 may also be in the shape of a quadrangular prism, an octagonal prism, etc., which is not specifically limited.

[0038] Specifically, in this embodiment, the image acquisition device is an industrial array camera 2, which captures and collects droplet information. Figure 1 As shown, a telecentric lens 3 is also included to cooperate with the industrial area array camera 2 to shoot droplet information, thereby improving the clarity of the shooting of the industrial area array camera 2.

[0039] In this embodiment, a hydrophobic agent is applied to the outer circumference of the outlet of the drainage catheter 4 to maintain the hydrophobicity of the outlet of the drainage catheter 4, reduce the adhesion of the droplets to the outlet, and reduce the interference with the axial symmetry of the droplets.

[0040] In this embodiment, Figure 3 As shown, it also includes a constant temperature and humidity glass cover 9, which is arranged on the outside of the image acquisition device, that is, the cover is arranged on the outside of the industrial area array camera 2 and the telecentric lens 3; further, it also includes a vibration isolation optical platform 1, and the flow measurement device is installed on the vibration isolation optical platform 1. The vibration isolation optical platform 1 is honeycomb-shaped, which can reduce the influence of environmental vibration, inclined plane and droplet evaporation loss, and further improve the accuracy of flow measurement.

[0041] In this embodiment, the drainage catheter 4 is connected to the injection pump 8 , and the injection pump 8 can be used to make the drainage catheter 4 drip liquid in the collection cavity 5 .

[0042] In this embodiment, an industrial computer is also included, and components such as the image acquisition device, the injection pump, and the backlight source are all connected to the industrial computer.

[0043] Those skilled in the art will easily think of other embodiments of the present application after considering the specification and practicing the embodiments of the present application. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that the present application does not apply for. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the appended claims.

Claims

1. A flow measurement device, characterized in that: include: A collection cavity (5), an image collection device, and a drainage catheter (4); The collection cavity (5) is arranged on a working platform; The drainage catheter (4) is arranged on the collection cavity (5), and the drainage catheter (4) is used for the outflowing liquid droplets to fall into the collection cavity (5); The image acquisition device is configured to capture information about droplets flowing out from the outlet of the drainage catheter (4).

2. The flow measurement device according to claim 1, characterized in that: It also comprises a backlight source (7), the backlight source (7) being arranged corresponding to the image acquisition device, the backlight source (7) being arranged to emit light towards the collection cavity (5), the light emitted by the backlight source (7) being used to illuminate the exit position of the drainage catheter (4).

3. The flow measurement device according to claim 2, characterized in that: One of the image acquisition devices and the backlight source (7) arranged correspondingly thereto form an information acquisition device for collecting droplet contour information, and the information acquisition device is provided in multiple groups.

4. The flow measurement device according to claim 3, characterized in that: It also includes a light isolation plate (6), wherein the light isolation plate (6) is arranged between adjacent information collection devices.

5. The flow measurement device according to claim 4, characterized in that: The light isolation plate (6) is covered with an anti-reflection coating.

6. The flow measurement device according to any one of claims 3 to 5, characterized in that: The collection cavity (5) is in the shape of a hexagonal prism, and three groups of information collection devices are provided, wherein each group of information collection devices is respectively provided on two opposite side surfaces of the hexagonal prism-shaped collection cavity (5).

7. The flow measurement device according to claim 1, characterized in that: A hydrophobic agent is applied to the outer circumference of the outlet of the drainage catheter (4).

8. The flow measurement device according to claim 1, characterized in that: It also includes a constant temperature and humidity glass cover (9), which is arranged on the outside of the image acquisition device.

9. The flow measurement device according to claim 1, characterized in that: The working platform is a vibration-isolating optical platform (1), and the flow measurement device is arranged on the vibration-isolating optical platform (1).

10. The flow measurement device according to claim 1, characterized in that: The image acquisition device is an industrial area array camera (2).

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