Miniature water quality ammonia nitrogen detection device based on fluorescence method

Abstract

The miniature water quality ammonia nitrogen detection device comprises a photocell power supply module, an LED (Light Emitting Diode) power supply module, a photocell light cylinder, a light filter, a focusing lens, a focusing lens gasket, an LED light cylinder, a collimating lens, a collimating lens gasket, a flow cell and a flow cell main body frame, the LED light cylinder, the collimating lens, the collimating lens gasket and the LED power supply module form a light source excitation end, the photocell light cylinder, the optical filter, the focusing lens, the focusing lens gasket and the photocell power supply module form a fluorescence signal receiving end, and the flow cell and the flow cell main body frame form a detected water sample detection main body. The light source excitation end is used for irradiating a flow cell in the flow cell main body frame; the fluorescence signal receiving end is used for receiving a fluorescence signal emitted by a to-be-detected substance in the flow cell after being excited by the light source excitation end; the detection device has the advantages that the detection device is small and flexible in design, and can be integrated on a multi-factor test platform in rivers and lakes to carry out related factor detection, so that the detection device can carry out real-time online detection more directly and efficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality ammonia nitrogen detection devices, in particular to a micro water quality ammonia nitrogen detection device based on a fluorescence method. Background Art

[0002] The fluorescence method is a method for detecting ammonia nitrogen in water based on the principle of interaction between fluorescent substances and ammonia nitrogen. This method adds fluorescent substances to the water sample, causing them to combine with ammonia nitrogen, and then observes the changes in fluorescence intensity to determine the ammonia nitrogen content. The fluorescence method for detecting ammonia nitrogen in water quality has the following advantages: 1. High precision and accuracy: The fluorescence method has high precision and accuracy and is suitable for the quantitative analysis of ammonia nitrogen in various water bodies. 2. High sensitivity: The fluorescence method has high sensitivity in detecting ammonia nitrogen and can accurately reflect changes in the ammonia nitrogen content in water bodies. 3. Strong real-time performance: The fluorescence method has a fast detection speed and is suitable for real-time monitoring and rapid analysis, which helps to detect water quality problems in a timely manner.

[0003] However, the instruments currently used for testing with this method are mostly large-scale fluorescence spectrophotometers used in laboratories. This not only results in high equipment maintenance costs and relatively harsh testing conditions, but also fails to achieve real-time detection of test conditions and cannot provide timely feedback of test data. Utility Model Content

[0004] In light of the above issues, the purpose of this utility model is to provide a miniature water quality ammonia and nitrogen detection device based on fluorescence, which can be integrated into a multi-factor testing platform for rivers, lakes, and other lakes to detect related factors. This device can achieve real-time detection and efficient data transmission, thus overcoming the shortcomings of the above-mentioned existing technologies.

[0005] The utility model provides a micro water quality ammonia nitrogen detection device based on fluorescence method, comprising: a photocell power module, an LED power module, a photocell light tube, a filter, a focusing lens, a focusing lens gasket, an LED light tube, a collimating lens, a collimating lens gasket, a circulation pool, and a circulation pool main frame;

[0006] The LED light tube, collimating lens, collimating lens gasket and LED power module constitute the light source excitation end. The collimating lens gasket, collimating lens and LED power module are sequentially installed in the LED light tube from front to back. The LED power module emits LED light through the collimating lens and irradiates outward from the front end of the LED light tube.

[0007] The photocell light barrel, the filter, the focusing lens, the focusing lens gasket and the photocell power module constitute a fluorescence signal receiving end. The focusing lens gasket, the focusing lens, the filter and the photocell power module are sequentially installed in the photocell light barrel from front to back. The photocell power module sequentially receives the fluorescence signal emitted by the substance to be tested in the flow cell after being excited through the filter and the focusing lens.

[0008] The circulation pool and the circulation pool main body frame constitute the water sample detection body to be tested, the circulation pool is installed on the circulation pool main body frame, and a connecting liquid port connected to the peripheral liquid path is provided on the circulation pool. The circulation pool is used to hold the water sample to be tested, and the light source excitation end and the fluorescence signal receiving end are installed on the circulation pool main body frame. The light source excitation end is used to illuminate the circulation pool inside the circulation pool main body frame, and the fluorescence signal receiving end is used to receive the fluorescence signal emitted by the substance to be tested in the circulation pool after being excited by the light source excitation end.

[0009] As a preferred embodiment of the present invention, the circulation pool is a transparent tank body, and the circulation pool main body frame is used to seal the circulation pool inside the circulation pool main body frame. The circulation pool is connected to the upper sealing head of the circulation pool, and the upper sealing head of the circulation pool is fixedly connected to the upper end of the circulation pool main body frame through the upper sealing head pressure cap of the circulation pool. The circulation pool is connected to the lower sealing head of the circulation pool, and the lower sealing head of the circulation pool is fixedly connected to the bottom end of the circulation pool main body frame through the lower sealing head pressure cap of the circulation pool. The circulation pool is connected to the peripheral liquid path through the upper sealing head of the circulation pool and the lower sealing head of the circulation pool.

[0010] As a preferred embodiment of the present invention, the main frame of the circulation pool is a rectangular box, and avoidance holes are opened in the middle of the two side walls of the main frame of the circulation pool, and the front ends of the LED light tube and the photocell light tube are connected to the two avoidance holes.

[0011] As a preferred embodiment of the present invention, the filter is a 425nm bandpass filter.

[0012] The beneficial effects of the utility model are as follows: the detection device is compact and flexible in design and can be integrated into a multi-factor test platform in rivers, lakes and reservoirs to perform relevant factor detection, making it more direct and efficient for real-time online detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0014] Figure 1 Schematic diagram of the overall structure of this embodiment.

[0015] Figure 2 for Figure 1 sectional view of .

[0016] Figure 3 Schematic diagram of the light source excitation end structure of this embodiment.

[0017] Figure 4 for Figure 3 sectional view of .

[0018] Figure 5 Schematic diagram of the structure of the fluorescence signal receiving end of this embodiment.

[0019] Figure 6 for Figure 5 sectional view of .

[0020] The figure marks include: photocell power module 1, LED power module 2, photocell light tube 3, filter 4, focusing lens 5, focusing lens gasket 6, LED light tube 7, collimating lens 8, collimating lens gasket 9, circulation pool 10, circulation pool main frame 11, circulation pool upper sealing head 12, circulation pool lower sealing head 13, circulation pool upper sealing head pressure cap 14, circulation pool lower sealing head pressure cap 15, light source excitation end 16, fluorescence signal receiving end 17, and tested water sample detection body 18. DETAILED DESCRIPTION

[0021] See Figure 1-6 As shown, the present embodiment provides a micro ammonia nitrogen detection device for water quality based on fluorescence method, including: a photocell power module 1, an LED power module 2, a photocell light tube 3, a filter 4, a focusing lens 5, a focusing lens gasket 6, an LED light tube 7, a collimating lens 8, a collimating lens gasket 9, a circulation pool 10, a circulation pool main body frame 11, an upper sealing head 12 of the circulation pool, a lower sealing head 13 of the circulation pool, an upper sealing head pressure cap 14 of the circulation pool, and a lower sealing head pressure cap 15 of the circulation pool. The LED light tube 7, collimating lens 8, collimating lens gasket 9 and LED power module (362nm LED light source) 2 constitute the light source excitation end 16. The collimating lens gasket 9, collimating lens 8 and LED power module 2 are installed in the LED light tube 7 from front to back. The LED power module 2 emits the LED light source through the collimating lens 8 from the front end of the LED light tube 7 to the outside; the photocell light tube 3, filter 4, focusing lens 5, focusing lens gasket 6 and photocell power module 1 constitute the fluorescence signal receiving end 17. The focusing lens gasket 9, focusing lens 5, filter 4 and photocell power module 1 are installed in the photocell light tube 3 from front to back. The photocell power module 1 receives the fluorescence signal emitted by the substance to be tested in the circulation pool after being excited through the filter 4 and focusing lens 5 in turn. The model of the photocell power module 1 is photocell receiver 2DU3. The circulation pool 10 and the circulation pool main frame 11 constitute the water sample detection body 18 to be tested. The circulation pool 10 is installed inside the circulation pool main frame 11. A connecting liquid port connected to the peripheral liquid path is opened on the circulation pool 10. The circulation pool 10 is used to hold the water sample to be tested. The light source excitation end 16 and the fluorescence signal receiving end 17 are installed on the circulation pool main frame 11. The light source excitation end 16 is used to illuminate the circulation pool 10 inside the circulation pool main frame 11. The fluorescence signal receiving end 17 is used to receive the fluorescence signal emitted by the substance to be tested in the circulation pool 10 after being excited by the light source excitation end 16.

[0022] The flow cell 10 in this embodiment is a transparent tank body, and the flow cell main frame 11 is used to seal the flow cell 10 inside the flow cell main frame 11. The upper end connection liquid port of the flow cell 10 is connected to the flow cell upper sealing head 12, and the flow cell upper sealing head 12 is fixedly connected to the upper end of the flow cell main frame 11 through the flow cell upper sealing head pressure cap 14. The lower end connection liquid port of the flow cell 10 is connected to the flow cell lower sealing head 13, and the flow cell lower sealing head 13 is fixedly connected to the bottom of the flow cell main frame 11 through the flow cell lower sealing head pressure cap 15. The flow cell 10 is connected to the peripheral liquid path through the flow cell upper sealing head 12 and the flow cell lower sealing head 13. The flow cell main frame 11 is a rectangular box body, and the middle position of the two side walls of the flow cell main frame 11 is provided with a avoidance hole. The front ends of the LED light tube 7 and the photocell light tube 3 are docked with the two avoidance holes. The filter 4 is a 425nm bandpass filter, and a 362nm LED lamp bead is installed on the LED power module 2. Compared to traditional light sources, LED lights are more energy-efficient and have a longer lifespan. Most importantly, they offer excellent light quality and are environmentally friendly.

[0023] In this embodiment, device communication, overall power supply, and data transmission are all implemented by the main control chip circuit. RS232 serial communication is used, ensuring stable and efficient data transmission. The overall power supply voltage is a low-voltage DC power supply of 5V, which is safe and easy to implement.

[0024] Working Principle: Upon receiving an excitation signal, the 362nm LED light source in the light source excitation terminal 16 emits excitation light, which is then irradiated into the flow cell 10 containing the substance to be measured. The substance to be measured in the flow cell 10 is excited and emits a fluorescence signal (fluorescence signals of varying intensities represent varying concentrations of the substance to be measured). This fluorescence signal is then received by the photocell power module 1 (photocell receiver) in the fluorescence signal receiving terminal 17. The filter 4 in the fluorescence signal receiving terminal 17 uses a 425nm bandpass filter to filter out interfering signals. The photocell power module 1 processes the collected signal value through the main control chip circuit and transmits it to the host computer program, completing the acquisition process.

[0025] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A micro water quality ammonia nitrogen detection device based on fluorescence method, characterized in that: include: Photocell power module, LED power module, photocell light tube, filter, focusing lens, focusing lens gasket, LED light tube, collimating lens, collimating lens gasket, flow cell, flow cell main frame; The LED light tube, collimating lens, collimating lens gasket and LED power module constitute the light source excitation end. The collimating lens gasket, collimating lens and LED power module are sequentially installed in the LED light tube from front to back. The LED power module emits LED light through the collimating lens and irradiates outward from the front end of the LED light tube. The photocell light barrel, the filter, the focusing lens, the focusing lens gasket and the photocell power module constitute a fluorescence signal receiving end. The focusing lens gasket, the focusing lens, the filter and the photocell power module are sequentially installed in the photocell light barrel from front to back. The photocell power module sequentially receives the fluorescence signal emitted by the substance to be tested in the flow cell after being excited through the filter and the focusing lens. The circulation pool and the circulation pool main body frame constitute the water sample detection body to be tested, the circulation pool is installed on the circulation pool main body frame, and a connecting liquid port connected to the peripheral liquid path is provided on the circulation pool. The circulation pool is used to hold the water sample to be tested, and the light source excitation end and the fluorescence signal receiving end are installed on the circulation pool main body frame. The light source excitation end is used to illuminate the circulation pool inside the circulation pool main body frame, and the fluorescence signal receiving end is used to receive the fluorescence signal emitted by the substance to be tested in the circulation pool after being excited by the light source excitation end.

2. A micro-water quality ammonia nitrogen detection device based on fluorescence method according to claim 1, characterized in that: The circulation pool is a transparent tank body, and the circulation pool main body frame is used to seal the circulation pool inside the circulation pool main body frame. The circulation pool is connected to the upper sealing head of the circulation pool, and the upper sealing head of the circulation pool is fixedly connected to the upper end of the circulation pool main body frame through the upper sealing head pressure cap of the circulation pool. The circulation pool is connected to the lower sealing head of the circulation pool, and the lower sealing head of the circulation pool is fixedly connected to the bottom end of the circulation pool main body frame through the lower sealing head pressure cap of the circulation pool. The circulation pool is connected to the peripheral liquid path through the upper sealing head of the circulation pool and the lower sealing head of the circulation pool.

3. A micro-water ammonia nitrogen detection device based on fluorescence method according to claim 1, characterized in that: The main frame of the circulation pool is a rectangular box, and avoidance holes are opened in the middle of the two side walls of the main frame of the circulation pool. The front ends of the LED light tube and the photocell light tube are connected to the two avoidance holes.

4. A micro-water quality ammonia nitrogen detection device based on fluorescence method according to claim 1, characterized in that: The filter is a 425nm bandpass filter.

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