Visual constant volume device and application thereof

Abstract

The invention relates to the field of constant volume devices, and discloses a visual constant volume device and application thereof.The visual constant volume device comprises a liquid adding module used for adding liquid into a constant volume container, and a mechanical arm module comprising a longitudinal moving assembly; the visual acquisition module moves up and down along with the movement of the longitudinal moving part and always keeps horizontal with the top surface of the liquid in the constant volume container; and the control module is electrically connected with the liquid adding module and the visual acquisition module, and is used for receiving the signal and executing corresponding operation, identifying the relative position of the liquid level and the scale line and the liquid level rising rate through a built-in algorithm, and further outputting a flow regulation instruction to the liquid adding module. According to the visual constant volume device, the mechanical arm synchronously bears the visual collection module and is in cooperative linkage with the liquid adding module through a built-in algorithm of the control module, efficiency and precision are improved, meanwhile, the liquid adding module is provided with a multi-channel liquid injection head and can be modularly customized according to requirements, and the visual constant volume device can be compatible with rapid mixing and matching of various liquids at the same time.

Description

Technical Field

[0001] This invention relates to the field of volume determination devices, specifically to a visual volume determination device and its applications, used in laboratory sample processing, water quality testing, food and drug analysis, chemical raw material preparation, and other occasions requiring high-precision volume determination. Background Technology

[0002] In fields such as laboratory testing and industrial production, liquid volume adjustment is a crucial step in ensuring the accuracy of subsequent analytical results and the stability of product quality.

[0003] Currently, visual volume determination devices can only stop when the mark is reached. They cannot predict changes in the liquid level or precisely control the liquid flow rate, resulting in a contradiction between the liquid addition speed and the volume determination accuracy. If the liquid addition speed is too fast, the liquid level may be over-rushed, while if the liquid addition speed is too slow, the processing efficiency will be affected. At the same time, existing visual volume determination devices have weak anti-interference ability in complex environments and low accuracy in liquid level recognition. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this invention is to provide a visual volume control device and its application that enables precise control and measurement of liquid volume.

[0005] To achieve the above-mentioned technical objectives, as a first aspect, the present invention provides the following technical solution: a visual volume determination device, comprising, The liquid filling module is used to add liquid to the fixed-volume container. A robotic arm module, which includes a longitudinal movement component; The visual acquisition module is connected to the vertical moving component and moves up and down with the vertical moving component, always keeping it level with the top surface of the liquid in the constant volume container. The control module, electrically connected to the liquid addition module and the vision acquisition module, is used to receive signals and execute corresponding operations. It identifies the relative position of the liquid surface and the scale line and the rate of liquid surface rise through a built-in algorithm, and then outputs flow adjustment commands to the liquid addition module.

[0006] According to the present invention, the liquid addition module further includes a mounting housing, in which a servo motor is installed. The servo motor is connected to a hollow shaft via a transmission mechanism. The top of the hollow shaft passes through the mounting housing and is connected to a liquid adder. The liquid adder has at least one injection head, and the injection head is correspondingly connected to a liquid supply power component and a liquid storage component. The liquid supply component is electrically connected to the control module and adjusts the liquid addition flow rate according to instructions.

[0007] According to the present invention, the transmission mechanism is a synchronous pulley, the output shaft of the servo motor is connected to the driving pulley of the synchronous pulley, and the hollow shaft is connected to the driven pulley of the synchronous pulley.

[0008] According to the present invention, there are multiple injection heads, each injection head is equipped with an independent peristaltic pump that provides liquid supply power and a liquid storage tank for storing liquid; it also includes a second photoelectric sensor for detecting the injection position.

[0009] According to the present invention, the robotic arm module further includes a fixed mounting base, on one side of which a lifting module with a longitudinal moving component is fixedly disposed, and also includes a camera mounting base fixedly connected to the longitudinal moving component, on which the vision acquisition module is mounted; it also includes a first photoelectric sensor electrically connected to the control module, used to detect whether the vision acquisition module is in position and to control its movement limits.

[0010] According to the present invention, there are two first photoelectric sensors, which are used to detect the upper and lower limits of the longitudinal movement component, respectively.

[0011] According to the present invention, the vision acquisition module further includes an industrial camera fixed to a camera mounting base and a matching lens and filter thereon, the matching lens being oriented toward the scale area of ​​the volumetric container for capturing dynamic images of the liquid surface inside the container in real time.

[0012] According to the present invention, it further includes a supplementary lighting module for providing stable and uniform illumination.

[0013] According to the present invention, it further includes a support platform on which the robotic arm module, the liquid addition module and the supplementary lighting module are all fixed; the support platform is also provided with a volumetric container base, which has a positioning groove for fixing the volumetric container, and the volumetric container is placed in the positioning groove.

[0014] In another aspect, the present invention also provides an application of the visual volume determination device, comprising the following steps: Step 1, Equipment Initialization and Parameter Setting: The parameters corresponding to the liquid addition module are preset through the control module, and the robotic arm module drives the vision acquisition module to reset; Step 2, Dynamic Liquid Addition and Image Acquisition: Start the liquid addition module and add liquid to the fixed volume container according to the preset requirements; at the same time, the vision acquisition module captures dynamic images of the liquid surface in real time and transmits the image data to the control module synchronously. Step 3, Real-time Identification and Flow Control: The control module processes the received image using a built-in image processing algorithm, controls the robotic arm module to rise as the liquid level in the fixed-volume container rises, and dynamically adjusts the liquid addition flow parameters based on the remaining fixed-volume space and the rate of liquid level rise. Step 4: Volume Adjustment Termination: When the control module detects that the edge of the liquid surface coincides with the preset scale line, that is, when the detection threshold is reached, it immediately sends a stop liquid addition command to the liquid addition module to complete the volume adjustment.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The visual volume-fixing device of the present invention features a robotic arm that synchronously carries a visual acquisition module and works in coordination with a liquid addition module through a built-in algorithm in the control module to improve efficiency and accuracy. The supplementary lighting module is suitable for volume-fixing transparent, light-colored solutions and corrosive reagents. Meanwhile, the liquid addition module has a multi-channel injection head and can be modularly customized according to requirements, enabling it to simultaneously accommodate the rapid mixing and proportioning of multiple liquids.

[0016] The visual acquisition module of this invention works in conjunction with the robotic arm module to maintain a horizontal viewing angle as the liquid level in the fixed-volume container rises and falls. Combined with the stable illumination from the supplementary lighting module, it accurately captures the relative position of the liquid level and the scale lines, avoiding observation errors. The control module identifies the rate of liquid level rise through a built-in algorithm and dynamically adjusts the flow rate to avoid overfilling and improve the acquisition accuracy of the visual acquisition module.

[0017] This invention uses various transparent and light-colored solutions for volume adjustment, has strong adaptability to different scenarios, is compatible with different specifications of volume adjustment containers, and can achieve rapid switching through parameter settings, making it highly flexible. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the visual volume-regulating device of the present invention; Figure 2 This is a schematic diagram of the structure of the robotic arm module of the present invention; Figure 3 This is a schematic diagram showing the connection between the visual acquisition module and the camera mounting base of the present invention; Figure 4 This is a schematic diagram of the liquid addition module of the present invention; Figure 5 This is a schematic diagram of the liquid addition module of the present invention from another perspective; Figure 6 This is a schematic diagram of the peristaltic pump of the present invention; Figure 7 This is a schematic diagram of the structure of the liquid storage tank of the present invention; Figure 8 This is a schematic diagram of the supplementary lighting module of the present invention; Figure 9 This is a schematic diagram of the volume-fixing container of the present invention installed on a support platform. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown in the illustration, this application provides a visual volumetric grading device. A liquid addition module 3, electrically connected to a control module, is mounted on a support platform 5 for adding liquid into a container. The control module controls the liquid addition speed of the liquid addition module 3. To ensure the visual acquisition image is level with the liquid surface, a robotic arm module 1 is also mounted on the support platform 5. The robotic arm module 1 includes a longitudinal movement component. The visual acquisition module 2 is fixed to the longitudinal movement component. The movement of the longitudinal movement component drives the visual acquisition module 2 to move longitudinally, allowing it to follow the up-and-down movement of the liquid surface, accurately achieving a level between the visual acquisition module 2 and the liquid surface, thus improving the accuracy of volumetric grading. The control module receives the liquid surface image transmitted by the visual acquisition module 2, identifies the relative position of the liquid surface and the scale line, and the rate of liquid surface rise using an algorithm, and then outputs a flow rate adjustment command to the liquid addition module 3.

[0021] Specifically, such as Figure 2 As shown, the robotic arm module 1 includes a fixed mounting base 6 whose bottom is fixedly connected to the support platform 5, a lifting module 7 with a longitudinal moving component fixedly mounted on one side, and a camera mounting base 9 fixedly connected to the longitudinal moving component for mounting a vision acquisition module 2; the vision acquisition module 2 is fixedly connected to the camera mounting base 9. Further, it also includes a first photoelectric sensor 8 electrically connected to the control module for detecting whether the vision acquisition module 2 is in position and controlling its movement limits; preferably, there are two first photoelectric sensors 8, used to detect the upper and lower limits of the longitudinal moving component, respectively.

[0022] The longitudinal movement component is a slide rail located on one side of the fixed mounting base 6. The camera mounting base 9 is equipped with a slider that matches the slide rail and a drive component that controls the longitudinal movement of the camera mounting base 9 along the slide rail. The drive component is electrically connected to the control module. The control module controls the start and stop of the drive component and controls the drive component based on the signal fed back by the photoelectric sensor 8 to prevent the camera mounting base 9 from exceeding its limits. The longitudinal movement component can also be a ball screw, hydraulic rod, or other component that can achieve longitudinal reciprocating movement, and the connection and placement of the camera mounting base 9 can be modified accordingly.

[0023] Specifically, such as Figure 3 As shown, the vision acquisition module 2 includes an industrial camera 10 fixed to the camera mounting base 9 and its matching lens 11 and filter 12. The matching lens 11 is oriented towards the scale area of ​​the volumetric container and is used to capture dynamic images of the liquid surface in the container in real time.

[0024] Specifically, such as Figure 4 and Figure 5As shown, the liquid filling module 3 includes a mounting housing with at least two parallel side plates 13. A middle partition 14 is horizontally fixed between the two side plates 13. A servo motor 15 is fixedly connected to the middle partition 14. The output shaft of the servo motor is connected to a synchronous pulley 16. A hollow shaft 19 passes through the top surface of the housing via the synchronous pulley 16 and is connected to a liquid filler 17 at this end. The liquid filler 17 has one or more injection heads 18. Each injection head 18 is equipped with an independent peristaltic pump 21 and a storage tank 22, enabling individual control of multiple liquids and improving volume control efficiency. It also includes a second photoelectric sensor 20 for detecting the injection position. The peristaltic pump 21 is connected to the control module and can adjust the liquid filling flow rate according to instructions. The injection head 18 is automatically selected by the servo motor 15 based on the pre-set position of the second photoelectric sensor 20. It should be noted that the peristaltic pump 21 and the storage tank 22 can be added or removed according to the number of types of liquids being filled, providing high flexibility.

[0025] In the embodiments of this application, such as Figure 6 As shown, the support platform 5 is also equipped with a supplementary lighting module 4, which is located on one side of the liquid filling module 3. It is used to provide stable and uniform lighting, replace or weaken the influence of ambient light, ensure the brightness of liquid surface images taken at different times and positions, and achieve consistent contrast. This provides a uniform clarity and contrast of liquid surface images for the control module's algorithm recognition, thereby improving the accuracy and stability of the control module's algorithm in recognizing the position of the liquid surface and scale lines.

[0026] The supplementary lighting module 4 includes a light source base 26 fixed to the support platform 5, a light source housing 25 connected to the base, a light source 24 disposed inside the housing 25, and a reflector 23 disposed outside the housing 25, with the reflector 23 facing the liquid filling module 3. The reflective intensity of the reflector 23 can be changed by adjusting the intensity of the light source 24, making it adaptable to various light compensations.

[0027] In the embodiments of this application, such as Figures 7 to 9 As shown, the support platform 5 is used to fix each device and the volumetric container base 27. The volumetric container base 27 has a positioning groove for fixing the volumetric container 28, ensuring that the volumetric containers are placed in a uniform position and avoiding identification errors caused by container offset.

[0028] The volume determination method of the above-mentioned visual volume determination device includes the following steps: Step 1, Equipment Initialization and Parameter Setting: The control module presets the liquid name, liquid addition sequence, and target volume for each stage of liquid filling for each injection head 18, i.e., the position of the scale line on the corresponding container, the reference liquid addition flow rate for different stages, and the liquid level recognition threshold; the robotic arm module 1 drives the vision acquisition module 2 to reset. Step 2, Dynamic Liquid Addition and Image Acquisition: Start the liquid addition module 3 and add liquid to the volumetric container 28 according to the preset requirements; at the same time, the vision acquisition module 2 captures dynamic images of the liquid surface in real time and transmits the image data to the control module synchronously. Step 3, Real-time Identification and Flow Regulation: The control module processes the received image through the built-in image processing algorithm and controls the robotic arm module 1 to rise as the liquid level in the constant volume container 28 rises. Based on the remaining constant volume space and the rate of liquid level rise, the liquid addition flow parameters are dynamically adjusted to ensure processing efficiency and avoid over-rushing of the liquid level, ensuring a smooth rise of the liquid level. Step 4: Volume Adjustment Termination: When the control module detects that the edge of the liquid surface coincides with the preset scale line, that is, when the detection threshold is reached, it immediately sends a stop liquid addition command to the liquid addition module 3 to complete the volume adjustment.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A visual volume-fixing device, characterized in that, include, The liquid filling module is used to add liquid to the fixed-volume container. A robotic arm module, which includes a longitudinal movement component; The visual acquisition module is connected to the vertical moving component and moves up and down with the vertical moving component, always keeping it level with the top surface of the liquid in the constant volume container. The control module, electrically connected to the liquid addition module and the vision acquisition module, is used to receive signals and execute corresponding operations. It identifies the relative position of the liquid surface and the scale line and the rate of liquid surface rise through a built-in algorithm, and then outputs flow adjustment commands to the liquid addition module.

2. The visual volume-regulating device as described in claim 1, characterized in that, The liquid addition module includes a mounting housing, in which a servo motor is installed. The servo motor is connected to a hollow shaft via a transmission mechanism. The top of the hollow shaft passes through the mounting housing and is connected to a liquid adder. The liquid adder has at least one injection head, which is connected to a liquid supply power component and a liquid storage component. The liquid supply component is electrically connected to the control module and adjusts the liquid addition flow rate according to instructions.

3. The visual volume-regulating device as described in claim 2, characterized in that, The transmission mechanism is a synchronous belt pulley, with the output shaft of the servo motor connected to the driving pulley of the synchronous belt pulley, and the hollow shaft connected to the driven pulley of the synchronous belt pulley.

4. The visual volume-regulating device as described in claim 2, characterized in that, The injection head comprises multiple injection heads, each equipped with an independent peristaltic pump that provides liquid supply power and a liquid storage tank for liquid storage; it also includes a second photoelectric sensor for detecting the injection position.

5. The visual volume adjustment device as described in claim 1, characterized in that, The robotic arm module includes a fixed mounting base, on one side of which a lifting module with a longitudinal moving component is fixedly mounted, and a camera mounting base fixedly connected to the longitudinal moving component, on which a vision acquisition module is mounted; it also includes a first photoelectric sensor electrically connected to the control module, used to detect whether the vision acquisition module is in position and to control its movement limits.

6. The visual volume-adjusting device as described in claim 5, characterized in that, There are two first photoelectric sensors, which are used to detect the upper and lower limits of the longitudinal movement component, respectively.

7. The visual volume-regulating device as claimed in claim 1, characterized in that, The vision acquisition module includes an industrial camera fixed to a camera mounting base and its matching lens and filter. The matching lens is oriented towards the scale area of ​​the volumetric container and is used to capture dynamic images of the liquid level inside the container in real time.

8. The visual volume adjustment device as claimed in claim 1, characterized in that, It also includes a supplemental lighting module to provide stable and uniform illumination.

9. The visual volume adjustment device as described in claim 8, characterized in that, It also includes a support platform, on which the robotic arm module, liquid addition module and supplementary lighting module are fixed; the support platform is also equipped with a volumetric container base, which has a positioning groove for fixing the volumetric container, and the volumetric container is placed in the positioning groove.

10. The application of the visual volume-regulating device as described in any one of claims 1-9, characterized in that, Includes the following steps, Step 1, Equipment Initialization and Parameter Setting: The parameters corresponding to the liquid addition module are preset through the control module, and the robotic arm module drives the vision acquisition module to reset; Step 2, Dynamic Liquid Addition and Image Acquisition: Start the liquid addition module and add liquid to the fixed volume container according to the preset requirements; at the same time, the vision acquisition module captures dynamic images of the liquid surface in real time and transmits the image data to the control module synchronously. Step 3, Real-time Identification and Flow Control: The control module processes the received image using a built-in image processing algorithm, controls the robotic arm module to rise as the liquid level in the fixed-volume container rises, and dynamically adjusts the liquid addition flow parameters based on the remaining fixed-volume space and the rate of liquid level rise. Step 4: Volume Adjustment Termination: When the control module detects that the edge of the liquid surface coincides with the preset scale line, that is, when the detection threshold is reached, it immediately sends a stop liquid addition command to the liquid addition module to complete the volume adjustment.

Images