Small portable water transparency detection device and detection method
The water transparency detection method that combines a tubular container and a photosensitive sensor solves the need for convenient detection of rural sewage treatment facilities, realizes fast and easy water transparency detection, reduces errors and simplifies operations.
Patent Information
- Application Number
- CN202511076494.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-01
- Publication Date
- 2025-09-26
AI Technical Summary
Rural sewage treatment facilities lack convenient online water quality monitoring equipment, resulting in long detection cycles and complex operations, making it difficult to meet the needs of efficient and fast water quality assessment.
Liquid transparency is detected using a cylindrical container, and a light-emitting sheet is used to emit detection light. Combined with a photosensor and a sunshade, the water transparency is calculated by simulating the critical point of visibility of underwater targets to the human eye, and the detection results are optimized through a natural light intensity compensation system.
It realizes the rapid and easy detection of water transparency, reduces the detection error, and the device is small in size and easy to operate, making it suitable for wide application at the grassroots level.
Smart Images
Figure CN120703039A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of water body detection, and in particular relates to a small and portable water body transparency detection device and a detection method. Background Art
[0002] With the continuous advancement of rural environmental governance in my country, a large number of rural sewage treatment facilities have been built and put into operation in various places. Due to the wide distribution of villages and towns and the scattered population, the corresponding sewage treatment sites are characterized by large number, wide coverage, and scattered layout. At present, the vast majority of rural sewage treatment stations are not equipped with online water quality monitoring equipment, making it difficult to obtain real-time and intuitive information on the effluent quality of sewage treatment facilities on site. Conventional water quality monitoring relies on operation and maintenance personnel to manually collect water samples on a regular basis and send them to the laboratory for analysis. This method has problems such as long detection cycles, cumbersome operating procedures, and high labor and time costs. It is difficult to meet the needs of daily operation and maintenance management of rural sewage treatment facilities for efficient and rapid water quality assessment.
[0003] To improve on-site testing efficiency, a variety of rapid water quality testing technologies and equipment have been developed both domestically and internationally. Mainstream domestic products include rapid water quality test kits and portable spectrophotometers. While these devices offer advantages such as small size, portability, and relatively low price, they still require complex testing procedures in actual operation and maintenance, requiring specialized operator skills, which limits their widespread and effective use at the grassroots level.
[0004] The clarity of effluent from rural sewage treatment facilities is a matter of intuitive assessment. Water clarity is a key indicator of water cleanliness. Overall, as water clarity improves, turbidity, total organic carbon, biochemical oxygen demand, suspended solids, and volatile suspended solids all decrease, demonstrating a negative correlation.
[0005] In order to facilitate daily operation and maintenance personnel to timely grasp the water quality status of the effluent from village sewage treatment plants, understand the clarity and transparency of the effluent from village sewage treatment plants and the transparency of surrounding water bodies, it is necessary to develop a portable and easy-to-operate water transparency detection device and detection method. Summary of the Invention
[0006] The present invention provides a water transparency detection method, which can realize rapid and simple detection of water transparency.
[0007] The present invention also provides a convenient water transparency detection device, which has the advantages of being small in size, easy to carry, and simple to operate.
[0008] Other purposes and advantages of the present invention can be further understood from the technical features disclosed in the present invention.
[0009] In order to achieve one or part or all of the above-mentioned purposes or other purposes, the present invention provides a water transparency detection method, which uses a cylindrical container to perform liquid transparency detection, wherein a light-emitting sheet is provided at the bottom of the cylindrical container, the light-emitting sheet emits detection light, and a light-shielding plate is provided on the side wall of the cylindrical container; the liquid to be detected is poured into the cylindrical container to a specified height; a light-shielding plate and a photosensor provided on the light-shielding plate are provided at the top of the cylindrical container; the photosensor sets a basic light intensity detection threshold; after the detection starts, the liquid to be detected in the cylindrical container slowly flows out from the bottom of the cylindrical container, and when the photosensor senses the detection light with a light intensity equal to the basic light intensity detection threshold; the height value of the liquid to be detected remaining in the cylindrical container at this time is read, and the water transparency is calculated based on the relationship between the height value and the water transparency.
[0010] The light-emitting sheet is a cross light-emitting sheet, and a linear polarizer is integrated on the surface of the cross light-emitting sheet; the photosensor is integrated with an analyzer, and the polarization direction of the analyzer is perpendicular to the linear polarizer.
[0011] The shading plate arranged on the side wall of the cylindrical container includes a fixed shading plate and a rotating shading plate; the side wall is provided with a height scale line corresponding to the transparency of the water body; when the detection starts, the rotating shading plate is rotated to completely block the external natural light.
[0012] A natural light intensity sensor is also provided on the top light-shielding cover plate provided on the top of the cylindrical container. The natural light intensity sensor is used to detect the natural light intensity of the cylindrical container before the light-emitting sheet works; the light intensity threshold of the photosensor is dynamically adjusted according to the detected natural light intensity, and the light intensity threshold of the photosensor is: the set basic photosensor light intensity threshold plus the natural light intensity multiplied by the compensation coefficient; the compensation coefficient of the natural light intensity is calibrated before the test begins.
[0013] The calibration method of the natural light intensity compensation coefficient includes constructing a natural light intensity compensation coefficient calculation formula: Among them, K is the compensation coefficient, H s H is the height of the standard liquid detected in the absence of natural light. m T is the standard liquid height value detected with natural light intensity but without compensation calculation, b is the basic light intensity detection threshold, E enois the illumination intensity of natural light; under different natural light intensities, the same cylindrical container is used to measure the standard liquid height values without compensation calculation under different natural light intensities multiple times, and the values are substituted into the calculation to obtain multiple K values, and the average value of the multiple K values is the required compensation coefficient; the cylindrical container used to calculate the K value is the same as the cylindrical container used to measure the liquid to be tested.
[0014] The basic light intensity detection threshold is set to 100Lux-500Lux.
[0015] After the detection starts, the liquid to be detected in the cylindrical container flows out from the bottom of the cylindrical container at a uniform speed.
[0016] Another technical solution of the present invention provides a small and portable water transparency detection device for implementing the steps of a water transparency detection method described above, including a base, a transparent cylindrical container arranged on the base, and the cylindrical container is provided with a fixed light shielding plate and a rotating light shielding plate; the fixed light shielding plate is arranged on the inner wall of the cylindrical container, and the fixed light shielding plate is in the shape of two symmetrically arranged tile-shaped light shielding plates; the rotating light shielding plate is sleeved on the outer wall of the cylindrical container, the rotating light shielding plate is also cylindrical, and the movable light shielding plate is provided with two symmetrically arranged tile-shaped light shielding parts and a transparent part; the side wall is provided with a height scale line corresponding to the water transparency value; the top of the cylindrical container is provided with a light shielding cover, and the cover is provided with a water inlet, a photosensor and a natural light intensity sensor; the bottom of the cylindrical container is provided with a drain pipe and a light-emitting component; the drain pipe is provided with a drain valve.
[0017] An audible and visual alarm is also provided outside the light-shielding cover plate arranged on the top.
[0018] A light-emitting component switch is provided on the base, and the light-emitting component includes a lamp holder provided on the base, and the lamp holder is threadedly fastened to the bottom of the tubular container; a light-emitting sheet is provided on the lamp holder; the light-emitting sheet is a cross-shaped light-emitting sheet, and a linear polarizer is integrated on the surface of the cross-shaped light-emitting sheet; the photosensor is integrated with a polarizer, and the polarization direction of the polarizer is perpendicular to the linear polarizer.
[0019] Compared with the prior art, the beneficial effects of the present invention mainly include: 1. The detection method of the present invention converts transparency into the maximum height of the water column that can be penetrated by simulating the critical point of visibility of underwater targets by the human eye. This method is simple and easy to operate. At the same time, the method of the present invention also integrates a natural light intensity compensation system, further optimizing the detection results and significantly reducing the error of the detection results. 2. The small and portable water transparency detection device of the present invention is set based on the above-mentioned detection method, and accordingly has the advantages of simple detection and small device size.
[0020] In order to make the above and other objects, features and advantages of the present invention more clearly understood, preferred embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0022] Figure 1 This is a schematic diagram of a small and portable water transparency detection device of the present invention.
[0023] Figure 2 for Figure 1 Top view of the device.
[0024] In the figure, 1 is the base; 2 is the light-emitting component switch; 3 is the lamp holder; 4 is the drain pipe; 41 is the drain valve; 5 is the height scale line; 6 is the light sensor; 7 is the natural light intensity sensor; 8 is the sound and light alarm; 9 is the water inlet; 10 is the fixed sunshade; 11 is the rotating sunshade; 111 is the sunshade part; 112 is the transparent part; 12 is the cover. DETAILED DESCRIPTION
[0025] The foregoing and other technical aspects, features, and functions of the present invention are clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are intended solely to refer to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention.
[0026] Example 1
[0027] Embodiment 1 provides a water transparency detection method, including using a tubular container to detect liquid transparency, wherein a light-emitting sheet is provided at the bottom of the tubular container, the light-emitting sheet emits detection light, and a light shielding plate is provided on the side wall of the tubular container; the liquid to be detected is poured into the tubular container to a specified height; a light shielding plate and a photosensor provided on the light shielding plate are provided at the top of the tubular container; the photosensor sets a basic light intensity detection threshold; after the detection starts, the liquid to be detected in the tubular container slowly flows out from the bottom of the tubular container, and when the photosensor senses the detection light with a light intensity equal to the set basic light intensity detection threshold; the height value of the liquid to be detected remaining in the tubular container at this time is read, and the water transparency is calculated based on the relationship between the height value and the water transparency.
[0028] The detection method of the present invention converts transparency into the maximum height of a penetrable water column by simulating the critical point of visibility of underwater targets to the human eye. Specifically, the detection light intensity generated by the light-emitting sheet is significantly stronger than the set basic light intensity detection threshold. When the water body is turbid, the greater the attenuation coefficient, the weaker the light penetration ability, and more water needs to be discharged to enable the sensor to sense the set basic light intensity detection threshold. When the water body is relatively transparent, the smaller the attenuation coefficient, the stronger the light penetration ability, and only a small amount of water needs to be discharged for the sensor to sense the set basic light intensity detection threshold.
[0029] Among them, according to the relationship between the height value of the remaining liquid in the container and the transparency, the height value or the water transparency value represented by the height value can be marked on the side wall of the container to simply indicate the transparency of the water body.
[0030] After the polarized light from the light source penetrates the water, the stray light reflected from the water surface is significantly filtered by the analyzer due to its random polarization direction. To reduce the impact of specular reflection from the water surface on the light source's identification at the bottom of the container, a linear polarizer is integrated on the surface of the cross-shaped light source. Simultaneously, an analyzer is integrated into the photosensor, with the polarization direction of the analyzer perpendicular to the linear polarizer. This polarization method aligns the direct light from the cross-shaped light source at the bottom with the polarization direction of the analyzer, allowing it to efficiently pass through the analyzer and be received by the sensor, significantly improving measurement accuracy in low-light environments. The light source uses a cross-shaped light source.
[0031] Among them, the sunshade arranged on the side wall of the cylindrical container includes a fixed sunshade and a rotating sunshade; the side wall is provided with a height scale line corresponding to the transparency of the water body; when the detection starts, the rotating sunshade is rotated to completely block the external natural light. After the detection is completed, the sunshade is rotated so that part of the wall of the container is not blocked. The internal water level height can be observed through this part of the wall. At the same time, the height scale line can be set on the wall at this position, so that the value can be quickly read when the rotating sunshade is opened.
[0032] Furthermore, because a rotating sunshade is used, natural light will inevitably enter the cylindrical container. Therefore, the set basic light intensity detection threshold will be inaccurate if it does not take into account the influence of natural light. Therefore, in order to compensate for the influence of natural light on detection, the present application also provides a natural light compensation method. Specifically, a natural light intensity sensor is also provided on the top sunshade cover provided on the top of the cylindrical container. The natural light intensity sensor first detects the natural light intensity in the cylindrical container before the light-emitting sheet works; the light intensity threshold of the photosensor is dynamically adjusted according to the detected natural light intensity, and the adjusted light intensity threshold of the photosensor is: the set basic photosensor light intensity threshold plus the natural light intensity multiplied by the compensation coefficient, where the compensation coefficient of the natural light intensity is calibrated before the test begins.
[0033] The calibration method of the compensation coefficient of natural light intensity includes constructing the compensation coefficient calculation formula: Among them, K is the compensation coefficient, H s H is the height of the standard liquid detected in the absence of natural light. m T is the standard liquid height value detected with natural light intensity but without compensation calculation, b is the basic light intensity detection threshold, E eno is the illumination intensity of natural light; under different natural light intensities, the same cylindrical container is used to measure the standard liquid height values without compensation calculation under different natural light intensities multiple times, and the values are substituted into the calculation to obtain multiple K values, and the average value of the multiple K values is the required compensation coefficient; the cylindrical container used to calculate the K value is the same as the cylindrical container used to measure the liquid to be tested.
[0034] The calculation principle of the natural light intensity compensation coefficient calibration formula of the present invention is: (H s -H m )×T b The energy equivalent of the measurement error; E eno ×H s It represents the total amount of ambient light interference (the integral effect of ambient light intensity on the measuring range). The ratio of the two is the natural light intensity compensation coefficient that needs to be compensated. The calculation method is to use the same cylindrical container to measure the standard liquid height value without compensation calculation under different natural light intensities multiple times, and substitute them into the calculation to obtain multiple K values. The average of the multiple K values is the required compensation coefficient. The obtained K value can be used for water transparency measurement in the same measuring container (the standard liquid height value on the container does not change).
[0035] Among them, the basic light intensity detection threshold is set to 100Lux-500Lux.
[0036] After the detection begins, the liquid to be detected in the cylindrical container flows out from the bottom of the cylindrical container at a uniform speed. Specifically, a solenoid valve can be set to control the flow rate of the water so that the flow rate of the water flowing out of the cylindrical container remains uniform, thereby improving the detection accuracy (slowly lowering the water level makes it easier for the photosensor to accurately capture the change in light intensity when the liquid level changes, thereby ensuring improved detection accuracy).
[0037] Example 2
[0038] The second embodiment provides a small portable water transparency detection device. The second embodiment provides a small portable water transparency detection device to implement the steps of the water transparency detection method described in the first embodiment above, such as Figure 1 as well as Figure 2 As shown, the small and convenient water transparency detection device specifically includes a base 1, a transparent cylindrical container arranged on the base 1, and the cylindrical container is provided with a fixed light shielding plate 10 and a rotating light shielding plate 11; the fixed light shielding plate 10 is arranged on the inner wall of the cylindrical container, and the fixed light shielding plate 10 is in the shape of two symmetrically arranged tile-shaped light shielding plates, so there is no light shielding component on the inner wall of the cylindrical container except the fixed light shielding plate 10, and the liquid level in the cylindrical container can be observed through the transparent tube wall of this part; the rotating light shielding plate 11 A movable light shield 11 is mounted on the outer wall of the cylindrical container. The rotating light shield 11 is also cylindrical and is provided with two symmetrically arranged tile-shaped light shielding portions 111 and a transparent portion 112. The tile-shaped light shield 111 rotates to block the transparent portion of the cylindrical container's inner wall, thereby shielding the cylindrical container. The transparent portion 112 of the rotating light shield 11 rotates to the transparent portion of the cylindrical container's inner wall, allowing the liquid level within the cylindrical container to be read. The sidewalls of the cylindrical container's inner wall are provided with height scale lines 5 corresponding to the water transparency. A light shielding cover 12 is provided on the top of the cylindrical container, equipped with a water inlet 9, a photosensor 6, and a natural light intensity sensor 7. A water discharge pipe 4 and a light-emitting assembly are provided at the bottom of the cylindrical container. A water discharge valve 41 is provided on the water discharge pipe 4.
[0039] An audible and visual alarm 8 is also provided outside the light shielding cover 12 provided on the top, which emits an audible and visual alarm according to the result of the light sensitive sensor 6. After the alarm is issued, the inspection personnel can close the waterproof valve and read the corresponding water level height value.
[0040] Furthermore, a light-emitting component switch 2 is provided on the base 1, and the light-emitting component includes a lamp holder 3 provided on the base 1, and the lamp holder 3 is threadedly fastened to the bottom of the tubular container; a light-emitting sheet is provided on the lamp holder 3; the light-emitting sheet is a cross-shaped light-emitting sheet, and a linear polarizer is integrated on the surface of the cross-shaped light-emitting sheet; the photosensor 6 is integrated with a polarizer, and the polarization direction of the polarizer is perpendicular to the linear polarizer.
[0041] The above is a detailed introduction to a small and portable water transparency detection device and detection method provided by the present invention. This article uses specific examples to illustrate the structure and working principle of the present invention. The description of the above embodiments is only intended to help understand the method and core concept of the present invention. It should be noted that for those skilled in the art, without departing from the principles of the present invention, various improvements and modifications can be made to the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims
1. A method for detecting water transparency, characterized in that: Liquid transparency testing is performed using a cylindrical container, wherein a light-emitting sheet is provided at the bottom of the cylindrical container to emit detection light, and a light shield is provided on the side wall of the cylindrical container; Pour the liquid to be tested into the cylindrical container to the specified height; A light shielding plate and a light sensitive sensor arranged on the light shielding plate are provided on the top of the cylindrical container; The light sensor sets the basic light intensity detection threshold; After the detection starts, the liquid to be detected in the cylindrical container slowly flows out from the bottom of the cylindrical container, and when the light sensor senses the detection light with a light intensity equal to the basic light intensity detection threshold; The height value of the liquid to be detected remaining in the cylindrical container at this time is read, and the water transparency is calculated based on the relationship between the height value and the water transparency.
2. A water transparency detection method according to claim 1, characterized in that: The light-emitting sheet is a cross light-emitting sheet, and a linear polarizer is integrated on the surface of the cross light-emitting sheet; The photosensor is integrated with a polarizer, and the polarization direction of the polarizer is perpendicular to the linear polarizer.
3. A water transparency detection method according to claim 1, characterized in that: The light shielding plate provided on the side wall of the cylindrical container includes a fixed light shielding plate and a rotating light shielding plate; The side wall is provided with height scale lines corresponding to the transparency of the water body; When the detection starts, the rotating sunshade is rotated to completely block the external natural light.
4. A water transparency detection method according to claim 3, characterized in that: A natural light intensity sensor is also provided on the top light shielding cover plate provided on the top of the cylindrical container. The natural light intensity sensor is used to detect the natural light intensity in the cylindrical container before the light-emitting sheet works. The light intensity threshold of the photosensor is dynamically adjusted according to the detected natural light intensity, and the light intensity threshold of the photosensor is: the set basic photosensor light intensity threshold plus the natural light intensity multiplied by the compensation coefficient; The compensation factor for natural light intensity is calibrated before the test begins.
5. A water transparency detection method according to claim 4, characterized in that: The calibration method of the compensation coefficient of natural light intensity includes: Construct the calculation formula of natural light intensity compensation coefficient: Among them, K is the compensation coefficient, H s H is the height of the standard liquid detected in the absence of natural light. m T is the standard liquid height value detected with natural light intensity but without compensation calculation, b is the basic light intensity detection threshold, E eno is the intensity of natural light; Under different natural light intensities, the same cylindrical container is used to measure the standard liquid height values under different natural light intensities without compensation calculation multiple times, and the values are substituted into the calculation to obtain multiple K values, and the average value of the multiple K values is the required compensation coefficient; The cylindrical container used for calculating the K value is the same as the cylindrical container used for measuring the liquid to be detected.
6. A water transparency detection method according to claim 1, characterized in that: The basic light intensity detection threshold is set to 100Lux-500Lux.
7. A water transparency detection method according to claim 1, characterized in that: After the detection starts, the liquid to be detected in the cylindrical container flows out from the bottom of the cylindrical container at a uniform speed.
8. A small and portable water transparency detection device, used to implement the steps of a water transparency detection method according to any one of claims 1 to 7, characterized in that: It comprises a base, a transparent cylindrical container arranged on the base, and the cylindrical container is provided with a fixed light shielding plate and a rotating light shielding plate; The fixed light shielding plate is arranged on the inner wall of the cylindrical container, and the fixed light shielding plate is in the form of two symmetrically arranged tile-shaped light shielding plates; The rotating light shielding plate is sleeved on the outer wall of the cylindrical container, the rotating light shielding plate is cylindrical, and the movable light shielding plate is provided with two symmetrically arranged tile-shaped light shielding parts and a transparent part; The side wall is provided with a height scale line corresponding to the water transparency value; A light-shielding cover is provided on the top of the cylindrical container, and a water inlet, a photosensor and a natural light intensity sensor are provided on the cover; A water discharge pipe and a light-emitting component are provided at the bottom of the tubular container; A drain valve is provided on the drain pipe.
9. A small and portable water transparency detection device according to claim 8, characterized in that: An audible and visual alarm is also provided outside the light-shielding cover plate arranged on the top.
10. A small and portable water transparency detection device according to claim 8, characterized in that: The base is provided with a light-emitting assembly switch, and the light-emitting assembly includes a lamp holder provided on the base, and the lamp holder is threadedly fastened to the bottom of the cylindrical container; The lamp holder is provided with a light-emitting sheet; The light-emitting sheet is a cross light-emitting sheet, and a linear polarizer is integrated on the surface of the cross light-emitting sheet; The photosensor is integrated with a polarizer, and the polarization direction of the polarizer is perpendicular to the linear polarizer.