Device for monitoring accumulation thickness of algae by measuring light intensity

Abstract

The utility model provides a device for monitoring the accumulation thickness of algae by measuring the light intensity, which is based on the quantitative corresponding relationship between the accumulation thickness of algae and the intensity of reflected light, which is clearly researched in a laboratory, and transmits a light intensity signal to a data conversion module by monitoring the light intensity at different water depth positions; and performing conversion and analysis on the relationship between the light intensity signal and the algae concentration, and finally performing early warning on the algae according to the calculated algae accumulation thickness and distribution in combination with an algae accumulation thickness early warning threshold value obtained by laboratory research. According to the utility model, based on the Internet technology, a large amount of manual field sampling work is reduced, so that not only can manpower be saved, but also the monitoring density and precision are improved; the device is simple and convenient to operate, low in cost, high in accuracy and more suitable for underwater online monitoring of algae accumulation in field water bodies, especially in large-scale water conveyance canals.

Description

Technical Field

[0001] The utility model relates to the field of ecological environment, in particular to a device for monitoring the thickness of algae accumulation by measuring light intensity. Background Art

[0002] Algae usually refers to autotrophic microorganisms (all eukaryotic except cyanobacteria) that can photosynthesize in water and live in a planktonic manner. There are many types of algae. The growth cycle of algae is short, and its species composition and community structure are very sensitive to changes in the water environment. It is an important biological monitoring indicator of the aquatic ecosystem. Its population structure is closely related to the state of the water environment. Algae surveys have always been an important part of water eutrophication research. Since the 1990s, the eutrophication trend of freshwater bodies in my country has increased significantly. In recent years, many reservoirs, lakes and rivers have frequently experienced high-concentration algae bloom disasters. Compared with traditional water quality testing, algae monitoring is intuitive, objective, comprehensive and historically traceable. Its results can more comprehensively and accurately reflect the quality of the water environment and the health level of the aquatic ecosystem itself, and can also evaluate the toxicity of water pollution and its potential impact on water quality and human health. Therefore, algae monitoring is one of the important indicators of water quality testing. Strengthening real-time monitoring of algae is particularly important for preventing and controlling algae blooms.

[0003] At present, there are three common algae monitoring methods: First, traditional algae monitoring usually relies on manual sampling and analysis, and professional inspectors use microscopes to identify and recognize samples one by one, which is time-consuming and labor-intensive and heavily dependent on the professional knowledge and identification experience of inspectors, limiting the standardization, promotion and popularization of algae monitoring. Second, eutrophication is detected through remote sensing micro-multispectral imaging, but due to the resolution of remote sensing satellites, its eutrophication monitoring can only observe large-scale eutrophication phenomena that have already erupted. For early warning, remote sensing observation is difficult to achieve. The third is a portable monitoring instrument based on algae fluorescence intensity monitoring. It is currently a relatively advanced algae monitoring technology that can identify living algae cells in water bodies and measure the biomass of various algae to achieve field monitoring, but it is mainly used to monitor algae at a certain depth below the water surface. It is difficult to monitor algae on the surface of the water body, and it is expensive and complex to maintain, so it is difficult to carry out extensively.

[0004] In summary, the utility model provides a device which is easy to operate, low in cost, and suitable for outdoor use, especially in water sources, water supply canals and other places, for monitoring the thickness of algae accumulation by measuring light intensity. Utility Model Content

[0005] The utility model aims to provide a device for monitoring the thickness of algae accumulation by measuring light intensity, so as to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides a device for monitoring the thickness of algae accumulation by measuring light intensity, comprising a water area component and an onshore component, wherein the water area component is connected to the onshore component, the water area component comprises a detection column, a plurality of photosensitive elements are axially distributed on the outer surface of the detection column, the photosensitive elements are electrically connected to a data transmission module through a data transmission line, an LED lamp is arranged on the top of the detection column, the onshore component comprises a power supply and a monitoring and early warning module, the LED lamp is electrically connected to the power supply through an electric wire, and the data transmission module is wirelessly connected to the monitoring and early warning module.

[0008] Preferably, the photosensitive element is a photoresistor.

[0009] Preferably, the interval between the photosensitive elements is 5-50 cm.

[0010] Preferably, the diameter of the LED lamp is 3-10 cm.

[0011] Preferably, the power source is a solar panel or a direct power supply.

[0012] Preferably, the data transmission module is wirelessly connected to the monitoring and early warning module via GPRS.

[0013] The utility model also provides a method for monitoring the thickness of algae accumulation by measuring light intensity, which is characterized by comprising the following steps:

[0014] S1. Set up a corresponding simulation device in the laboratory, conduct indoor research on the corresponding relationship between algae accumulation thickness, distribution and reflected light intensity through orthogonal experiments, clarify the quantitative relationship formula between algae accumulation thickness, distribution and reflected light intensity, determine the early warning threshold of algae accumulation thickness, and establish a large database;

[0015] S2. Investigate and monitor the water level during the flood season and dry season of the water area, install a device that monitors the thickness of algae accumulation by measuring light intensity, and the top of the detection column is 10-20cm above the water surface during the flood season, and the bottom is fixed at an appropriate depth at the bottom of the river (lake);

[0016] S3. Take samples on site and determine the thickness of algae accumulation in the waters near the device through indoor analysis. Calibrate the device based on the algae accumulation thickness data monitored indoors.

[0017] Compared with the prior art, the utility model has achieved the following beneficial technical effects:

[0018] The utility model provides a device for monitoring the thickness of algae accumulation by measuring light intensity, and proposes an accumulation degree alarm value based on management needs, thereby realizing online monitoring and alarm of algae. The monitoring accuracy rate is higher than 80%. By adjusting the length of the detection column, it can adapt to the detection needs of areas with different water depth changes, and according to the results of indoor laboratory detection and analysis, the early warning threshold of the algae accumulation degree in different target areas is adjusted in real time. The utility model is supported by Internet technology, which reduces a large amount of manual field sampling work, which not only saves manpower, but also improves the density and accuracy of monitoring. The utility model is not only simple to operate, low in cost, and high in accuracy, but also more suitable for online underwater monitoring of algae accumulation in the field. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 The utility model provides a schematic diagram of the structure of a device for monitoring the thickness of algae accumulation by measuring light intensity. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model aims to provide a device for monitoring the thickness of algae accumulation by measuring light intensity, so as to solve the problems existing in the prior art.

[0023] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0024] Embodiment 1:

[0025] This embodiment provides a device for monitoring the thickness of algae accumulation by measuring light intensity, such as Figure 1As shown, it includes a water area component and a shore component. The water area component is connected with the shore component. The water area component includes a detection column 1. The detection column 1 has a diameter of 5-20 cm and is made of alloy or stainless steel. No metal dissolution occurs during long-term immersion. The length can be flexibly adjusted according to the water depth of the monitoring location. An underwater fixing method is adopted. A plurality of photosensitive elements 2 are axially distributed on the outer surface of the detection column 1. The photosensitive elements 2 are electrically connected to the data transmission module 4 through a data transmission line 3. An LED lamp 5 is provided on the top of the detection column 1. The shore component includes a power supply 6 and a monitoring and early warning module 7. The LED lamp 5 is electrically connected to the power supply 6 through an electric wire, and the data transmission module 4 is wirelessly connected to the monitoring and early warning module 7.

[0026] As an implementation mode, the photosensitive element 2 is strip-shaped, each strip is evenly wound on the detection column at an interval of 5-50cm, the diameter is flexibly adjusted according to the diameter of the detection column 1, and the layout spacing is adjusted according to the length of the detection column. Generally, a circle is set at an interval of 5-10cm in the area of ​​0.5m from the head of the detection column, and a circle can be set at an interval of 10-50cm in the area below 0.5m according to the actual monitoring accuracy, so as to facilitate the relatively dense collection of transmitted light signals, and convert the transmitted light intensity into an electrical signal, and transmit the electrical signal to the data transmission module through the data transmission line for transmission. The photosensitive element generally adopts a photoresistor, which is a resistor made by the photoelectric effect of a semiconductor, and the resistance value changes with the intensity of the incident light. When the incident light is strong, the resistance decreases, and when the incident light is weak, the resistance increases; photoresistors are generally used for light measurement, light control and photoelectric conversion (converting light changes into electrical changes). The electrical signals of strip-shaped photosensitive elements at different positions are respectively taken through the integrated data line, and the strength of the electrical signals at different depths represents the concentration of algae, so as to realize the monitoring and early warning of algae at different water depths.

[0027] As an implementation method, the LED lamp 5 is white light, a plug-in round head, and a diameter of 3-10 cm. It is installed directly above the detection column as a monitoring light source at night or in dim light during the day. Its switch is controlled by a light sensing system. When the external light is lower than a certain value, the LED lamp is automatically turned on to provide the detection column with sufficiently strong light as a monitoring light source.

[0028] As an implementation mode, the power source 6 is a solar panel or a direct power supply.

[0029] As an implementation method, the data transmission module 4 is wirelessly connected to the monitoring and early warning module 7 via GPRS.

[0030] The monitoring and early warning module 7 includes integrated sound and light signals, electrical signal collection, algorithm modules, hardware facilities, etc. It can not only use artificial intelligence algorithms to establish a quantitative relationship between reflected light intensity and algae concentration (or accumulation thickness), but also can convert the electrical signal data transmitted back by the underwater device into algae biomass data. Based on the early warning threshold of algae accumulation determined by relevant experimental data, it can promptly issue an alarm for exceeding the standard.

[0031] This embodiment also provides a method for monitoring the thickness of algae accumulation by measuring light intensity, which is characterized by comprising the following steps:

[0032] S1. Set up a corresponding simulation device in the laboratory, conduct indoor research on the corresponding relationship between algae accumulation thickness, distribution and reflected light intensity through orthogonal experiments, clarify the quantitative relationship formula between algae accumulation thickness, distribution and reflected light intensity, determine the early warning threshold of algae accumulation thickness, and establish a large database;

[0033] The indoor laboratory is able to independently carry out experimental analysis of algae. Mainly using the light transmission method, carry out indoor research on the correspondence between typical algae concentration (or accumulation thickness) and reflected light intensity, build a water simulation box, install the utility model's algae online monitoring and early warning device in the water simulation box, and construct multiple water simulation boxes. The algae species and their concentrations (or accumulation thicknesses) in each water simulation box are different. ① According to the experimental results, through data processing software such as origin, determine the correspondence between algae concentration (or accumulation thickness) and reflected light intensity, clarify the best monitoring method, conduct research on interference factors such as suspended matter and wind and waves, and provide detection accuracy; ② Combined with the characteristics of algae accumulation, from multiple angles such as sensory organs, ecological risks, and impact on water supply safety, research and propose early warning thresholds for algae concentration (or accumulation degree);

[0034] S2. Investigate and monitor the water level during the flood and dry seasons of the water area, install a device that monitors the thickness of algae accumulation by measuring light intensity, use an underwater fixation method, and install it to withstand the intensity of a 5-10-year rainstorm. The top of the detection column is 10-20 cm above the water surface during the flood season, and the bottom is fixed at an appropriate depth to the bottom of the river (lake);

[0035] S3. On-site sampling, through indoor analysis to determine the thickness of algae accumulation in the waters near the device, the device is calibrated according to the algae accumulation thickness data monitored indoors to improve the accuracy of the monitoring data.

[0036] The utility model uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A device for monitoring the thickness of algae accumulation by measuring light intensity, characterized in that: It includes a water area component and an onshore component, the water area component is connected to the onshore component, the water area component includes a detection column, a plurality of photosensitive elements are axially distributed on the outer surface of the detection column, the photosensitive elements are electrically connected to a data transmission module through a data transmission line, an LED lamp is provided on the top of the detection column, the onshore component includes a power supply and a monitoring and early warning module, the LED lamp is electrically connected to the power supply through an electric wire, and the data transmission module is wirelessly connected to the monitoring and early warning module.

2. The device for monitoring the thickness of algae accumulation by measuring light intensity according to claim 1, characterized in that: The photosensitive element is a photoresistor.

3. The device for monitoring the thickness of algae accumulation by measuring light intensity according to claim 1, characterized in that: The interval between the photosensitive elements is 5-50 cm.

4. The device for monitoring the thickness of algae accumulation by measuring light intensity according to claim 1, characterized in that: The diameter of the LED lamp is 3-10 cm.

5. The device for monitoring the thickness of algae accumulation by measuring light intensity according to claim 1, characterized in that: The power source is a solar panel or a direct power supply.

6. The device for monitoring the thickness of algae accumulation by measuring light intensity according to claim 1, characterized in that: The data transmission module is wirelessly connected to the monitoring and early warning module via GPRS.

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