Water quality float paper color identification and titration integrated device

Abstract

The utility model relates to water quality float paper color identification and titration integrated device, including the identification platform, the non -transparent float shell of installing in the upper end of identification platform, the round rotary tray of rotation installation on the identification platform, the titration module and image acquisition module of fixed mounting in the upper end both sides of identification platform, the inside of non -transparent float shell is provided with rudder and control assembly, the round rotary tray sets up in the inside of non -transparent float shell and can rotate about the central axis, the edge department of round rotary tray upper end is provided with titration position and detection position respectively, image acquisition module sets up above detection position, and is perpendicular to point to detection position, the titration module's dropper export faces titration position, and the rudder is used for driving the round rotary tray rotation, the utility model discloses through the imaging structure of non -transparent shell and the illumination of self -carrying, and titration, detection substation -type process, the influence of environmental light and drop disturbance to the identification result is reduced significantly, and the stability and repeatability of outdoor comparison are improved.

Description

Technical Field

[0001] This utility model relates to the field of online monitoring and embedded detection technology of water environment, specifically an integrated device for color recognition and titration of water quality float test paper. Background Technology

[0002] With the increasing demand for rapid on-site monitoring in scenarios such as watershed management, drinking water sources and agricultural water bodies, rapid water quality testing based on colorimetric test strips has been widely adopted due to its low cost and convenient operation. Traditional methods mostly involve manually collecting water, manually adding colorimetric reagents and comparing the color with a color chart. This method is greatly affected by factors such as ambient light, operator's subjective judgment and consistency of reagent dosage, and is difficult to meet the needs of continuous and long-term online monitoring.

[0003] One existing solution is "manual comparison" on-site testing: personnel perform titration and reading by hand on-site or on a shipboard platform. Its advantages are simple equipment and low investment cost, but it has significant drawbacks: 1. The comparison reading is highly subjective and has poor repeatability; 2. Strong outdoor light, reflection and shadow changes can significantly change the color imaging effect of the test strip; 3. It is difficult to strictly keep the added volume and reaction time consistent; 4. It cannot achieve unattended high-frequency monitoring.

[0004] The second existing solution is the "semi-enclosed camera detection type": a camera is placed inside a float or box to image the test strip, and the color is determined by a simple threshold or grayscale. Although this solution reduces human subjective error to some extent, it generally suffers from the following problems: 1. Light transmission or light leakage through gaps in the outer shell causes unstable incident light, and water surface reflection and day-night changes cause color drift; 2. Titration and imaging are performed in the same location, and the dynamics of the droplets, bubbles, and liquid films during the titration process can interfere with the imaging; 3. Limited by low-computing-power microcontroller platforms, color spaces and robust image algorithms (such as HSV / illuminance normalization) are difficult to operate reliably; 4. Data is mostly uploaded via short-range communication, and the ability to transmit data over long distances across water bodies and obstacles is insufficient.

[0005] The third existing solution is the "automated laboratory colorimeter": it uses a constant light source, precision optics and constant temperature conditions to achieve high accuracy; however, the equipment is large in size, consumes a lot of power and is expensive, and is not suitable for deployment on water buoys affected by wind and waves, making it difficult to achieve distributed, low-cost, wide-coverage deployment in water areas.

[0006] In summary, the existing technologies mainly suffer from the following common problems: 1. Uncontrollable ambient light leads to poor stability of colorimetric imaging; 2. Titration disturbances are coupled with imaging, affecting the accuracy of identification; 3. Mechanical replacement of test strips is inconvenient and makes continuous measurement difficult; 4. Insufficient computing and communication capabilities make it difficult to complete reliable color identification and stably transmit results at the end.

[0007] Therefore, there is an urgent need for an integrated device for color recognition and titration of test strips for floating water applications. This device would employ an opaque shell to form an optically sealed space, separate the dosing and detection positions on a circular rotating tray, and execute a "dip first, test later" process. It would utilize an integrated lighting camera and an embedded processing platform (such as Loongson 2K300) to run an image recognition algorithm based on the HSV color space, and achieve long-distance, low-power data transmission via LoRa, thereby improving the stability, repeatability, and online capability of color measurement in outdoor environments. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides an integrated device for color recognition and titration of water quality float test strips, which solves the problems of unstable recognition, poor repeatability, and difficulty in continuous online monitoring caused by inconsistencies in ambient light and manual operation in existing on-site colorimetric methods.

[0009] To achieve the above objectives, this utility model provides the following technical solution: an integrated device for color recognition and titration of water quality float test strips, comprising a recognition platform, an opaque float shell mounted on the upper part of the recognition platform, a circular rotating tray rotatably mounted on the recognition platform, a titration module and an image acquisition module fixedly mounted on both sides of the upper part of the recognition platform, a servo motor and a control component being installed inside the opaque float shell, the circular rotating tray being located inside the opaque float shell and rotatable around its central axis, a drip position and a detection position being respectively set at the upper edge of the circular rotating tray, the image acquisition module being located above the detection position and pointing vertically towards the detection position, and the titration module being located above the drip position, with the drip outlet of the titration module facing the drip position, the circular rotating tray being connected to the output end of the servo motor via a coupling, the servo motor being used to drive the circular rotating tray to rotate, changing the positions of the drip position and the detection position, and the control component being used to receive information from the servo motor and the image acquisition module.

[0010] Furthermore, the surface of the recognition station is equipped with an internal light-shielding plate. The opaque float shell and the internal light-shielding plate form an optically sealed space. The image acquisition module integrates a lighting lamp to provide directional and uniform illumination to the detection position.

[0011] It is important to note that the opaque float shell and the recognition platform are detachably connected, facilitating the replacement of the test strips and the structure on the tray. The opaque float shell and the internal light-shielding structure together form an optically sealed space to shield against external ambient light interference and stabilize color imaging conditions. Before assembly, the inner cavity surface is treated with a matte finish and a transparent protective window and sealing ring are installed to improve the ability to resist stray light and waterproof and dustproof performance. The relative positions of the camera and the dropper are factory-calibrated and have a fixed limiting structure to improve repeatability accuracy.

[0012] Furthermore, the detection position and the dropper position are arranged opposite each other along the outer edge of the circular rotating tray, the optical axis of the camera is coaxial with the center of the detection position, and the dropper outlet is coaxial with the center of the dropper position.

[0013] Furthermore, both the detection position and the drop position are used to support the test strip and are evenly distributed along the circumference of the circular rotating tray. The servo motor drives the circular rotating tray to move in steps according to the displacement angle, so that the drop position and the detection position can switch with each other.

[0014] Furthermore, the control components include a control processing module and a wireless transmission module fixedly installed inside the recognition station. The control processing module is used to control the servo motor and the image acquisition module respectively, and to process and calculate the acquired images.

[0015] It should be noted that the control and processing module is based on the Loongson 2K300 processor platform. The control and processing module runs the OpenCV image processing program, uses the HSV color space threshold to identify the color of the test strip, and outputs the measurement results according to the preset color-test strip measurement parameter correspondence. The wireless transmission module is a LoRa communication unit, which is used to send the measurement results and their time information to the gateway through the LoRa network.

[0016] Furthermore, the control processing module integrates an image processing program, and the wireless transmission module is used to send the measurement results and their time information to a remote terminal.

[0017] Furthermore, a fixed dropper is fixedly installed at the end of the titration module, and the dropper outlet is fixed above the titration position. A valve is installed inside the titration module, and the control and processing module controls the quantitative addition through the valve.

[0018] It should be noted that the titration module process includes a preset reaction time, which is set by the control and processing module according to the test strip type and timed after the titration is completed.

[0019] In addition, this utility model also provides an integrated device for color recognition and titration of water quality float test strips, which includes an upper-level gateway and a data platform wirelessly connected to the integrated device for receiving, storing, displaying and alarming the test results.

[0020] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0021] 1. This water quality float test strip color recognition and titration integrated device, through its opaque shell and self-illuminating imaging structure, as well as the titration and detection substation process, significantly reduces the impact of ambient light and dripping disturbance on the recognition results, and improves the stability and repeatability of outdoor colorimetry.

[0022] 2. This water quality float test strip color recognition and titration integrated device utilizes an embedded processing platform (preferably Loongson 2K300) to run the HSV color recognition algorithm on the end side and achieves long-distance, low-power data transmission via LoRa. Combined with multi-station sequential measurement using a rotating tray, it improves detection efficiency and reduces manual intervention, making it suitable for online monitoring and distributed deployment in scenarios such as water sources, farmland water bodies, and rivers and lakes. Attached Figure Description

[0023] Figure 1 The diagram shown is a schematic of the circular rotating tray structure of this utility model;

[0024] Figure 2 The diagram shown is a schematic representation of the overall structure of this utility model.

[0025] Figure 3 The diagram shown is a front view sectional view of the present utility model.

[0026] Figure 4 The diagram shown is a top view of the cross-sectional structure of this utility model.

[0027] Explanation of reference numerals in the attached diagram: 101, Identification stage; 1, Opaque float shell; 2, Circular rotating tray; 3, Titration module; 4, Image acquisition module; 5, Servo motor; 6, Control processing module; 7, Wireless transmission module; 8, Internal light shield; 9, Titration position; 10, Detection position. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-4The water quality float test strip color recognition and titration integrated device in this embodiment includes a recognition platform 101, an opaque float shell 1 mounted on the upper end of the recognition platform 101, a circular rotating tray 2 rotatably mounted on the recognition platform 101, a titration module 3 and an image acquisition module 4 fixedly mounted on both sides of the upper end of the recognition platform 101. The opaque float shell 1 is equipped with a servo motor 5 and a control component. The circular rotating tray 2 is located inside the opaque float shell 1 and can rotate around its central axis. A drop position 9 and a detection position 10 are respectively set at the upper edge of the circular rotating tray 2. The image acquisition module 4 is located above the detection position 10 and points vertically towards the detection position 10. The titration module 3 is located above the drop position 9, and the dropper outlet of the titration module 3 faces the drop position 9. The circular rotating tray 2 is connected to the output end of the servo motor 5 via a coupling. The servo motor 5 is used to drive the circular rotating tray 2 to rotate and change the position of the drop position 9 and the detection position 10. The control component is used to receive information from the servo motor 5 and the image acquisition module 4.

[0030] In this embodiment, the surface of the identification platform 101 is provided with an internal light shield 8. The opaque float shell 1 and the internal light shield 8 form an optically sealed space. The image acquisition module 4 integrates an illumination lamp to provide directional and uniform illumination to the detection position 10.

[0031] It should be noted that placing the titration and detection on opposite sides of the tray 2 and performing "tipping before testing" can significantly reduce the impact of titration disturbance and changes in ambient light on the identification results. The tray is driven by a servo motor 5 to achieve multi-station sequential measurement, and the LoRa wireless transmission module 7 enables long-distance, low-power data transmission, which is suitable for online monitoring and distributed deployment in scenarios such as water sources, farmland water bodies, and rivers and lakes.

[0032] Please see Figure 1 , Figure 3 and Figure 4 In this embodiment, the detection position 10 and the dropper position 9 are arranged opposite each other along the outer edge of the circular rotating tray 2. The optical axis of the camera is coaxial with the center of the detection position 10, and the dropper outlet is coaxial with the center of the dropper position 9. The detection position 10 and the dropper position 9 are both used to carry the test strip and are evenly distributed along the circumference of the circular rotating tray 2. The servo motor 5 drives the circular rotating tray 2 to step by displacement angle, so that the dropper position 9 and the detection position 10 switch with each other (the dropper position 9 and the detection position 10 are placed in opposite positions (preferably with an angle of about 180° between their centers)).

[0033] It should be noted that the multi-station sequential measurement is achieved through mechanical rotation, which is simple in structure and easy to maintain. The servo motor 5 drives the circular rotating tray 2 to rotate, which facilitates the switching between the detection position 10 and the drop position 9.

[0034] Please see Figure 1 and Figure 3In this embodiment, the control components include a control processing module 6 and a wireless transmission module 7 fixedly installed inside the recognition station 101. The control processing module 6 is used to control the servo motor 5 and the image acquisition module 4 respectively, and to process and calculate the acquired images. The control processing module 6 integrates an image processing program. The wireless transmission module 7 is used to send the measurement results and their time information to a remote terminal.

[0035] It should be noted that, in conjunction with the integrated lighting camera and the edge image algorithm (HSV threshold discrimination) and LoRa long-distance, low-power reporting, stable colorimetry and continuous online monitoring can be achieved in outdoor environments; key parameters (drop volume, reaction time, HSV threshold and color-parameter mapping table) can be configured and designed according to the test strip type and target indicators.

[0036] Please see Figure 3 and Figure 4 In this embodiment, a fixed dropper is fixedly installed at the end of the titration module 3, and the dropper outlet is fixed above the titration position 9. A valve is provided inside the titration module 3, and the control processing module 6 controls the quantitative addition through the valve.

[0037] It should be noted that the image is acquired at the detection position only after the titration is completed and the preset reaction time has been reached. This reduces the impact of droplets, liquid films and bubbles on the recognition results, ensuring recognition accuracy and smoothness.

[0038] The working process of the integrated device for color identification and titration of water quality float test paper described in this utility model is as follows:

[0039] Step 1: Place the test paper in the idle position (drop position and detection position) of the circular rotating tray 2, and the system will complete the position identification and initialization.

[0040] Step 2: Under the instruction of the control processing module, the tray is rotated to the titration position, the titration module 3 performs quantitative titration and automatically starts the reaction timing.

[0041] Step 3: After the reaction timer reaches the preset time, the tray rotates to the detection position, and the image acquisition module 4 turns on its built-in illumination and acquires a color image.

[0042] Step 4: The control processing module 6 performs HSV color space threshold discrimination on the image based on OpenCV, and outputs the value or level of the measured index by combining the preset "color-test paper measurement parameters".

[0043] Step 5: The control processing module 6 reports the measurement results, timestamps and device status to the gateway via the wireless transmission module 7 using LoRa, and can cache the records locally for retransmission at the breakpoint.

[0044] Step Six: The tray is rotated to the next station according to the step angle to prepare for subsequent titration and testing of the test strips, so as to achieve continuous measurement.

[0045] It should be noted that the control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device integrating color recognition and titration of water quality float test strips, characterized in that: The system includes an identification platform (101), an opaque float housing (1) mounted on the upper part of the identification platform (101), a circular rotating tray (2) rotatably mounted on the identification platform (101), a titration module (3) and an image acquisition module (4) fixedly mounted on both sides of the upper part of the identification platform (101). The opaque float housing (1) is equipped with a servo motor (5) and control components. The circular rotating tray (2) is located inside the opaque float housing (1) and can rotate around its central axis. The upper edge of the circular rotating tray (2) is equipped with a titration device. (9) and detection position (10), the image acquisition module (4) is set above the detection position (10) and points vertically towards the detection position (10), while the titration module (3) is set above the titration position (9), and the dropper outlet of the titration module (3) faces the titration position (9). The circular rotating tray (2) is connected to the output end of the servo motor (5) via a coupling. The servo motor (5) is used to drive the circular rotating tray (2) to rotate and change the position of the titration position (9) and the detection position (10). The control component is used to receive information from the servo motor (5) and the image acquisition module (4).

2. The integrated device for color recognition and titration of water quality float test paper according to claim 1, characterized in that: The surface of the identification platform (101) is provided with an internal light shield (8). The opaque float shell (1) and the internal light shield (8) form an optically sealed space. The image acquisition module (4) integrates a lighting lamp to provide directional and uniform illumination to the detection position (10).

3. The integrated device for color recognition and titration of water quality float test paper according to claim 1, characterized in that: The detection position (10) and the drop position (9) are arranged opposite each other along the outer edge of the circular rotating tray (2). The optical axis of the camera is coaxial with the center of the detection position (10), and the dropper outlet is coaxial with the center of the drop position (9).

4. The integrated device for color recognition and titration of water quality float test paper according to claim 1, characterized in that: The detection position (10) and the drop position (9) are both used to carry the test paper and are evenly distributed along the circumference of the circular rotating tray (2). The servo motor (5) drives the circular rotating tray (2) to move in steps according to the displacement angle, so that the drop position (9) and the detection position (10) can switch with each other.

5. The integrated device for color identification and titration of water quality float test paper according to claim 1, characterized in that: The control components include a control processing module (6) and a wireless transmission module (7) fixedly installed inside the identification station (101). The control processing module (6) is used to control the servo motor (5) and the image acquisition module (4) respectively, and to process and calculate the acquired images.

6. The integrated device for color recognition and titration of water quality float test paper according to claim 5, characterized in that: The control processing module (6) integrates an image processing program, and the wireless transmission module (7) is used to send the measurement results and their time information to a remote terminal.

7. The integrated device for color identification and titration of water quality float test paper according to claim 1, characterized in that: A fixed dropper is fixedly installed at the end of the titration module (3), and the outlet of the dropper is fixed above the titration position (9). A valve is installed inside the titration module (3), and the control processing module (6) controls the quantitative addition through the valve.

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