System for automatically measuring water transparency in light-limited scene and operation method

Abstract

The invention belongs to the technical field of water body measurement, and particularly relates to an automatic water body transparency measuring system in a light-limited scene and an operation method.The measuring system comprises a saishi disc and a winch, the saishi disc is connected with the winch through a rope, a balancing weight is arranged on the saishi disc, the measuring system further comprises a fixing cylinder, and the fixing cylinder is connected with the winch through a rope. The saybolt disc and the winch are both arranged in a barrel cavity of the fixed barrel, a light source, a camera and ultrasonic detection equipment which are located above the saybolt disc are arranged in the barrel cavity, the barrel wall of the fixed barrel is hollowed out, and the camera and the ultrasonic detection equipment are in signal connection with a processor. The measuring system and method can supplement light to the surrounding environment of the water body, reduce the influence of light limitation on measured data, accurately and automatically measure the transparency of the water body in real time, and contribute to formulating a unified judgment standard for the measurement of the transparency of the water body.

Description

Technical Field

[0001] This invention belongs to the field of water body measurement technology, specifically relating to an automatic water transparency measurement system and operation method in light-limited scenarios. Background Technology

[0002] A Seymbo disc is a tool for measuring water transparency. When testing water transparency using a Seymbo disc, one end of a rope is first securely tied to a fixed point in the center of the disc. The disc is then lowered into the water. Lowering is stopped when the boundary between the black and white areas of the disc is just barely discernible to the naked eye. The corresponding reading on the rope at the water surface is then recorded. However, the current scale on the traction rope is relatively small due to the influence of the rope, making data reading inconvenient for operators. Furthermore, measurements are difficult to take in water with high flow rates. Although a lead weight is used, the Seymour disc still drifts with the water flow, affecting the accuracy of the measurement. Furthermore, traditional measurement methods rely on staff visually judging the endpoint of the Seymour disc in the water body, which is greatly affected by ambient light and lacks a unified judgment standard, often resulting in higher values ​​for the same water body on sunny days than on cloudy days. In addition, due to limited ambient light conditions such as rainy days and nights, it is impossible to obtain real-time data on the impact of rainfall, agricultural runoff, and factory pollution emissions on water transparency, which has a significant impact on the monitoring and management of non-point source and point source pollution of water bodies.

[0003] Therefore, how to measure water transparency in light-limited environments is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides an automatic water transparency measurement system and operation method for light-limited scenarios. It can supplement the light in the surrounding environment of the water body, reduce the impact of measurement data when light is limited, and accurately measure the water transparency in real time automatically. This helps to establish a unified judgment standard for the measurement of water transparency.

[0005] The specific technical solution adopted in this invention is as follows: An automatic water transparency measurement system for light-limited environments includes a Seisch disk and a winch. The Seisch disk is connected to the winch via a rope. A counterweight is installed on the Seisch disk. The measurement system also includes a fixed cylinder. The Seisch disk and the winch are both located inside the cavity of the fixed cylinder. A light source, a camera, and an ultrasonic detection device are installed above the Seisch disk inside the cavity. The wall of the fixed cylinder is hollowed out. The camera and ultrasonic detection device are connected to a processor.

[0006] The measuring system also includes a guide assembly disposed within the cylindrical cavity, wherein the Seidon disk moves vertically up and down within the cylindrical cavity with the aid of the guide assembly.

[0007] The guiding assembly includes a first slide rail and a first slider, wherein the first slide rail is fixedly connected to the cylinder wall and the first slider is fixedly connected to the Seidon disk.

[0008] The fixed cylinder is equipped with a second slide rail and a camera lifting drive device, and the camera is set up by means of a second slider and the second slide rail for guiding and sliding.

[0009] The lifting drive device includes a lead screw and a lead screw nut. The lead screw is rotatably mounted on a fixed cylinder and connected to a motor drive. The lead screw nut is fixedly connected to a second slider.

[0010] The aforementioned Seisel disk includes a set of interconnected whiteboards and blackboards. The whiteboards are horizontally positioned, one side of the blackboard is connected to the whiteboard, and the other side of the blackboard is tilted and bent downwards.

[0011] The bottom of the fixed cylinder is provided with telescopic support legs, which are inserted and fixed to the bottom of the water body.

[0012] A guide cylinder is suspended inwardly on the wall of the fixed cylinder. The ultrasonic detection device forms a guiding engagement with the guide cylinder through a guide rod. The side of the guide rod is connected to the float through a connecting rod. The float is located below the ultrasonic detection device.

[0013] An operating method, implemented using an automatic water transparency measurement system in a light-limited environment, includes the following steps: S1. Fix the fixing cylinder in the water and adjust the height of the fixing cylinder; S2. Turn on the light source; S3. The winch starts, causing the Seidon disc to descend vertically in the fixed drum, while the camera captures images of the Seidon disc. S4. The camera transmits the captured image to the processor. The processor identifies the outline of the Seidon disk and the contrast of the black and white grid in the image. When the contrast is lower than the preset threshold, it is determined that the Seidon disk has optically disappeared in the water. At this time, the ultrasonic detection device is activated. The processor calculates the water depth data based on the ultrasonic echo signal of the ultrasonic detection device to obtain the water transparency.

[0014] In step S3, the winch controls the Seido disk to descend at a constant speed, and the camera takes continuous or timed pictures.

[0015] The beneficial effects of this invention are: This invention integrates a Seymonic disk, a light source, a camera, and an ultrasonic detection device onto a fixed cylinder for easy installation and fixation. The light source is an LED lamp used to simulate daytime light, reducing the impact of insufficient ambient light during the measurement process. This helps to obtain real-time data on the impact of rainfall, farmland drainage, and factory pollution emissions on water transparency. The camera captures images of the Seymonic disk descending in the water, acquiring an image sequence. After the controller analyzes the data transmitted from the camera and determines that the Seymonic disk is not visible, it activates the ultrasonic detection device to measure the water depth data of the Seymonic disk, thereby obtaining the water transparency. This eliminates the need for human experience-based judgment, achieving a standardized measurement and improving the accuracy of water transparency measurement.

[0016] The wall of the fixed cylinder is hollowed out to facilitate the exchange and flow of outdoor water inside the fixed cylinder, ensuring that the water inside and outside the fixed cylinder remains consistent.

[0017] The Seisch disk moves vertically up and down within the cylinder with the help of a guide assembly, effectively avoiding the problem of Seisch disk drifting or tilting caused by water flow disturbance, ensuring that the Seisch disk always remains in a horizontal state when descending, and further improving the accuracy of the measurement data. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 A magnified view of part A; Figure 3 This is an axonometric view of the Seymne disk; Figure 4 This is a top view of the Seymne disk; Figure 5 This is an assembly diagram of the guide cylinder, guide rod, and ultrasonic detection equipment. In the attached diagram, 1. Sesquirrel disc, 101. Whiteboard, 102. Blackboard, 2. Winch, 3. Counterweight, 4. Fixed cylinder, 5. Light source, 6. Camera, 7. Ultrasonic detection device, 8. First slide rail, 9. First slider, 10. Second slide rail, 11. Second slider, 12. Lead screw, 13. Lead screw nut, 14. Telescopic outrigger, 15. Guide cylinder, 16. Guide rod, 17. Float, 18. Connecting rod. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Specific implementation examples Figure 1 , Figure 2As shown, this invention relates to an automatic water transparency measurement system for light-constrained environments, comprising a Seymonic disk 1 and a winch 2. The Seymonic disk 1 is connected to the winch 2 via a rope. A counterweight 3 is mounted on the Seymonic disk 1. The measurement system also includes a fixed cylinder 4. The Seymonic disk 1 and the winch 2 are both disposed within the cylinder cavity of the fixed cylinder 4. A light source 5, a camera 6, and an ultrasonic detection device 7 are disposed above the Seymonic disk 1 within the cylinder cavity. The light source 5, camera 6, and ultrasonic detection device 7 are all positioned above the surface of the water to be measured. The ultrasonic detection device 7 is an ultrasonic probe that emits ultrasonic waves vertically downwards. The light source 5 is an LED light used to simulate daytime light, reducing the influence of ambient light during the measurement process and aiding in measurement. The system acquires real-time data on the impact of rainfall, farmland drainage, and factory pollution emissions on water transparency. The fixed cylinder 4 has a hollowed-out wall to facilitate the exchange and flow of outdoor water within it, ensuring consistency between the water inside and outside the cylinder and improving the accuracy of water transparency measurement. The camera 6, ultrasonic detection device 7, and processor are connected via signal. Preferably, the processor is a handheld processor for water, connected to a handheld instrument panel. The camera 6 captures images of the descending Seidon disk 1 in the water, acquiring an image sequence. After the controller analyzes the data transmitted from the camera 6 and determines that the Seidon disk 1 is not visible, the processor uses the ultrasonic detection device 7 to measure the water depth data of the Seidon disk 1 and displays the water transparency on the handheld instrument panel.

[0020] The measuring system also includes a guide assembly installed inside the cylinder cavity. The Seisch disk 1 moves vertically up and down inside the cylinder cavity with the help of the guide assembly. The guide assembly includes a first slide rail 8 and a first slider 9. The first slide rail 8 is fixedly connected to the cylinder wall, and the first slider 9 is fixedly connected to the Seisch disk 1. When the winch 2 is working, the Seisch disk 1 descends vertically with the cooperation of the first slider 9 and the first slide rail 8 during descent. This effectively avoids the problem of drifting or tilting of the Seisch disk 1 caused by water flow disturbance, ensuring that the Seisch disk 1 always descends in a horizontal state and improving the accuracy of the measuring data.

[0021] Preferably, a lifting drive device is provided on the fixed cylinder 4, which includes a second slide rail 10 and a camera 6. The camera 6 is set up with the second slide rail 10 through the second slider 11. The lifting drive device can drive the camera 6 to move up and down in the fixed cylinder 4. Since the water level may fluctuate, the water level rises when measuring water transparency. The relative height of the camera 6 on the fixed cylinder 4 can be adjusted by the lifting drive device to keep the camera 6 above the water surface. This eliminates the need for staff to frequently lift the fixed cylinder 4 to adjust its installation height, and keeps the camera 6 at a fixed distance from the water surface. This is especially suitable for long-term water transparency measurement operations.

[0022] The lifting drive device includes a lead screw 12 and a lead screw nut 13. The lead screw 12 is rotatably mounted on the fixed cylinder 4 and connected to the motor drive. The lead screw nut 13 is fixedly connected to the second slider 11. The motor is mounted on the cylinder wall of the fixed cylinder 4. When the motor drives the lead screw 12 to rotate, the lead screw nut 13 moves along the axial direction of the lead screw 12, thereby driving the camera 6 to rise and fall vertically relative to the fixed cylinder 4.

[0023] like Figure 3 , Figure 4 As shown, the Seidon disk 1 in this invention includes a set of interconnected white boards 101 and black boards 102. The white boards 101 are horizontally arranged, and one side of the black board 102 is connected to the white boards 101, retaining the black-and-white dividing line. The other side of the black board 102 is inclined and bent downwards. During the descent of the Seidon disk 1, the water flow is affected by the wall of the fixed cylinder 4. Although the wall of the fixed cylinder 4 is hollowed out to allow for normal exchange between the water inside the fixed cylinder 4 and the outside water, it still weakens the water flow trend. Impurities and disturbed silt in the water easily settle on the upper surface of the Seidon disk 1 and are difficult to be washed away by the water inside the fixed cylinder 4, affecting the judgment of the black-and-white dividing line of the Seidon disk 1. During the descent of the Seidon disk 1 in this invention, the water flow passes through the gap between the bent side of the black board 102 and the white board 101. The gap provides a narrow channel for the water flow, forcing the water flow to accelerate and washing away the impurities and silt settled on the Seidon disk 1, improving the accuracy of the measurement data of water transparency.

[0024] The bottom of the fixed cylinder 4 is provided with a telescopic support leg 14. The fixed cylinder 4 is fixed to the bottom of the water body by means of the telescopic support leg 14, which can meet the needs of fixing in water bodies at different depths. The telescopic support leg 14 can be retracted to reduce the overall height of the measuring system, which is convenient for storage and transportation.

[0025] like Figure 1 , Figure 5 As shown, a guide cylinder 15 is suspended inward from the wall of the fixed cylinder 4. The guide cylinder 15 is fixedly connected to the wall of the fixed cylinder 4. The ultrasonic detection device 7 forms a guiding fit with the guide cylinder 15 through the guide rod 16. The ultrasonic detection device 7 is installed at the bottom of the guide rod 16. A limiting platform is provided at the top of the guide rod 16. The diameter of the limiting platform is larger than the diameter of the guide rod 16 to prevent the guide rod 16 from falling out of the guide cylinder 15. The side of the guide rod 16 is connected to the float 17 through the connecting rod 18. The float 17 is located below the ultrasonic detection device 7. The float 17 rises and falls according to the rise and fall of the water level, thereby driving the ultrasonic detection device 7 to rise and fall relative to the water level, ensuring that the ultrasonic detection device 7 is always above the water level and at the same distance from the water level.

[0026] The connecting rod 18 is a rigid rod, and when the float 17 rises and falls, it uses the connecting rod 18 to effectively push and pull the guide rod 16.

[0027] A method for operating an automatic water transparency measurement system in light-limited environments includes the following steps: S1. Adjust the length of the telescopic support leg 14, insert the telescopic support leg 14 into the bottom of the water body, fix the fixed cylinder 4 in the water body, and adjust the height of the camera 6 inside the fixed cylinder 4. S2. Turn on light source 5 to simulate daytime light and standardize the light intensity of the water body to be tested, which helps to improve the accuracy of the measurement data and the consistency of the judgment criteria. S3. The winch 2 starts, causing the Seidon disk 1 to descend vertically at a constant speed in the fixed drum 4. At the same time, the camera 6 continuously or periodically captures images of the Seidon disk 1 to obtain an image sequence. S4 and camera 6 transmit the captured images to the processor. The processor preprocesses the captured images (such as grayscale conversion, filtering, enhancement, etc.) and uses computer vision algorithms to identify the outline of the Seisch disk 1 in the image and the contrast of the black and white grids. The black and white grids are the white board 101 and the black board 102. When the contrast is lower than a preset threshold, it is determined that the Seisch disk 1 has optically disappeared in the water. At this time, the ultrasonic detection device 7 is activated. The processor calculates the water depth data based on the ultrasonic echo signal of the ultrasonic detection device 7 to obtain the water transparency.

Claims

1. An automatic water transparency measurement system for light-limited scenarios, comprising a Seymbidium disc (1) and a winch (2), wherein the Seymbidium disc (1) is connected to the winch (2) by means of a rope, and a counterweight (3) is provided on the Seymbidium disc (1), characterized in that: The measurement system also includes a fixed cylinder (4), in which the Seidon disk (1) and the winch (2) are both located inside the cylinder cavity of the fixed cylinder (4). Inside the cylinder cavity are a light source (5), a camera (6) and an ultrasonic detection device (7) located above the Seidon disk (1). The cylinder wall of the fixed cylinder (4) is hollowed out. The camera (6) and the ultrasonic detection device (7) are connected to the processor via signals.

2. The automatic water transparency measurement system for light-limited scenarios according to claim 1, characterized in that: The measuring system also includes a guide assembly set inside the cylinder cavity, and the Seidon disk (1) moves vertically up and down inside the cylinder cavity with the help of the guide assembly.

3. The automatic water transparency measurement system for light-constrained scenarios according to claim 2, characterized in that: The guiding component includes a first slide rail (8) and a first slider (9) for guiding and sliding. The first slide rail (8) is fixedly connected to the cylinder wall, and the first slider (9) is fixedly connected to the Seidon disk (1).

4. The automatic water transparency measurement system for light-limited scenarios according to claim 1, characterized in that: The fixed cylinder (4) is equipped with a lifting drive device for a second slide rail (10) and a camera (6). The camera (6) is guided and assisted by the second slider (11) and the second slide rail (10).

5. The automatic water transparency measurement system for light-limited scenarios according to claim 4, characterized in that: The lifting drive device includes a lead screw (12) and a lead screw nut (13) provided in a matching manner. The lead screw (12) is rotatably mounted on the fixed cylinder (4) and connected to the motor drive. The lead screw nut (13) is fixedly connected to the second slider (11).

6. The automatic water transparency measurement system for light-limited scenarios according to claim 1, characterized in that: The Seis disk (1) includes a set of whiteboards (101) and blackboards (102) that are spliced ​​together. The whiteboards (101) are set horizontally, one side of the blackboards (102) is connected to the whiteboards (101), and the other side of the blackboards (102) is bent downwards at an angle.

7. The automatic water transparency measurement system for light-limited scenarios according to claim 1, characterized in that: The bottom of the fixed cylinder (4) is provided with a telescopic support leg (14), which is inserted and fixed to the bottom of the water body.

8. The automatic water transparency measurement system for light-limited scenarios according to claim 1, characterized in that: A guide cylinder (15) is suspended inward on the wall of the fixed cylinder (4). The ultrasonic detection device (7) forms a guiding fit with the guide cylinder (15) by means of a guide rod (16). The side of the guide rod (16) is connected to the float (17) by means of a connecting rod (18). The float (17) is located below the ultrasonic detection device (7).

9. An operating method, implemented using an automatic water transparency measurement system for light-constrained scenarios as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Fix the fixing cylinder (4) in the water body; S2, turn on the light source (5); S3. The winch (2) is started, causing the Seidon disc (1) to descend vertically in the fixed cylinder (4), while the camera (6) takes pictures of the Seidon disc (1). S4. The camera (6) transmits the captured image to the processor. The processor identifies the outline of the Seidon disk (1) and the contrast of the black and white grid in the image. When the contrast is lower than the preset threshold, it is determined that the Seidon disk (1) has optically disappeared in the water. At this time, the ultrasonic detection device (7) is activated. The processor calculates the water depth data based on the ultrasonic echo signal of the ultrasonic detection device (7) to obtain the water transparency.

10. An operating method according to claim 9, characterized in that: In step S3, the winch (2) controls the Seido disk (1) to descend at a constant speed, and the camera (6) performs continuous or timed shooting.

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