Water quality COD (Chemical Oxygen Demand) detection device based on multi-source spectrum fusion

Abstract

The utility model discloses a water quality COD (Chemical Oxygen Demand) detection device based on multi-source spectrum fusion, relates to the field of water quality COD detection, and aims to solve the problems that in the prior art, in order to improve the detection accuracy, different spectrum methods are commonly used for respectively detecting and then contrasting, the existing different spectrum method detection instruments are independently arranged, and the detection cost is low. And a sample needs to be divided into a plurality of parts for monitoring, which is troublesome. A light source conversion device is arranged on one side of the integrated spectrometer, an ultraviolet-visible light receiving port is formed in the rear end of the end face of one side of the light source conversion device, a three-dimensional fluorescence receiving port is formed in the front end of the end face of one side of the light source conversion device, and a three-dimensional fluorescence incidence port is formed in the rear end of the end face of the other side of the light source conversion device. And an ultraviolet-visible light incident port is formed in the front end of the end face of the other side of the light source conversion device, a rotating table is rotationally arranged in the middle of the fixing plate, and semicircular light barriers are fixedly connected to the two sides of the upper end of the rotating table.

Description

Technical Field

[0001] The utility model relates to the field of water quality COD detection, in particular to a water quality COD detection device based on multi-source spectrum fusion. Background Technique

[0002] Water resources are one of the necessary resources for human production and life and are the cradle of all life on Earth. In the daily detection process of sewage, the biodegradability of sewage is usually measured by the value of biochemical oxygen demand in five days (BOD5) / chemical oxygen demand (COD). In this ratio, the COD parameter is extremely important and plays a key role.

[0003] Chemical oxygen demand (COD) is the amount of reducing substances that need to be oxidized in a water sample measured by a chemical method. It is the oxygen equivalent of substances (generally organic substances) that can be oxidized by strong oxidants in wastewater, effluent from wastewater treatment plants, and polluted water. The larger the COD value, the more severely the water body is polluted by organic substances. In the prior art, the methods for measuring the water quality COD index mainly include three methods: spectroscopy, hyperspectral imaging technology, and microbial fuel cells. Among them, spectroscopy includes ultraviolet-visible spectroscopy, infrared spectrophotometry, fluorescence spectroscopy, etc.

[0004] At present, for the sake of detection accuracy, different spectral methods are usually used for separate detection and mutual comparison. Existing detection instruments using different spectral methods are independently set, and the samples need to be divided into multiple portions for monitoring, which is time-consuming and laborious. Therefore, there is an urgent need in the market to develop a water quality COD detection device based on multi-source spectrum fusion to help people solve existing problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a water quality COD detection device based on multi-source spectrum fusion to solve the problem that in order to ensure detection accuracy, several different spectral methods are usually used for separate detection and mutual comparison in the above background technique. Existing detection instruments using different spectral methods are independently set, and the samples need to be divided into multiple portions for monitoring, which is rather troublesome.

[0006] To achieve the above object, the present utility model provides the following technical solution: A water quality COD detection device based on multi-source spectral fusion, including an integrated spectrometer. A light source conversion device is arranged on one side of the integrated spectrometer. An ultraviolet-visible light spectrometer is arranged at the rear end of one side inside the integrated spectrometer, and a three-dimensional fluorescence spectrometer is arranged at the front end of one side inside the integrated spectrometer. An ultraviolet-visible light receiving port is arranged at the rear end of one side end face of the light source conversion device, and a three-dimensional fluorescence receiving port is arranged at the front end of one side end face of the light source conversion device. A three-dimensional fluorescence incident port is arranged at the rear end of the other side end face of the light source conversion device, and an ultraviolet-visible light incident port is arranged at the front end of the other side end face of the light source conversion device. A three-dimensional fluorescence generating assembly is connected to the rear end of one side of the light source conversion device, and an ultraviolet-visible light generating assembly is connected to the front end of one side of the light source conversion device. A fixing plate is fixedly connected to the lower end inside the light source conversion device, and an annular support member is fixedly connected to the middle of the lower end inside the light source conversion device. A rotating table is rotatably arranged in the middle of the fixing plate, and semi-circular light-shielding plates are fixedly connected to both sides of the upper end of the rotating table.

[0007] Preferably, an ultraviolet-visible light receiving cover is connected to the outside of the ultraviolet-visible light receiving port, and an ultraviolet-visible light light guide cover is connected to the outside of the ultraviolet-visible light incident port.

[0008] Preferably, a three-dimensional fluorescence receiving cover is connected to the outside of the three-dimensional fluorescence receiving port, and a three-dimensional fluorescence light guide cover is connected to the outside of the three-dimensional fluorescence incident port.

[0009] Preferably, between the ultraviolet-visible light light guide cover and the ultraviolet-visible light generating assembly, between the three-dimensional fluorescence light guide cover and the three-dimensional fluorescence generating assembly, between the ultraviolet-visible light receiving cover and the ultraviolet-visible light spectrometer, and between the three-dimensional fluorescence receiving cover and the three-dimensional fluorescence spectrometer, they are all connected by anti-ultraviolet optical fibers.

[0010] Preferably, the ultraviolet-visible light generating assembly is composed of an ultraviolet-visible light source and an optical attenuator, and the three-dimensional fluorescence generating assembly is composed of a three-dimensional fluorescence source and a spectroscopic system.

[0011] Preferably, a rotating shaft is fixedly connected to the middle of the lower end of the rotating table. A servo motor is arranged inside the integrated spectrometer at the lower end of the light source conversion device, and a movable cover plate is connected to the upper end of the light source conversion device.

[0012] Preferably, the lower end of the rotating shaft passes through the light source conversion device and extends into the integrated spectrometer and is fixedly connected to the output shaft of the servo motor.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] 1. In this utility model, through the setting of the light source conversion device, a rotating table is rotatably arranged in the middle of the fixed plate. On both sides of the upper end of the rotating table, semi-circular light shielding plates are fixedly connected. By rotating the rotating table, the semi-circular light shielding plates close the symmetric openings on both sides of the side end face of the light source conversion device, and the symmetric openings on the other side are communicated through the space between the two semi-circular light shielding plates, realizing the conversion of the light source and enabling the same instrument to perform different light source spectrum detections.

[0015] 2. In this utility model, through the setting of the ultraviolet-resistant optical fiber, the ultraviolet-visible light guide cover and the ultraviolet-visible light generating component, the three-dimensional fluorescence guide cover and the three-dimensional fluorescence generating component, the ultraviolet-visible light receiving cover and the ultraviolet-visible light spectrometer, and the three-dimensional fluorescence receiving cover and the three-dimensional fluorescence spectrometer are all connected by ultraviolet-resistant optical fibers. The ultraviolet-resistant optical fibers are used for beam transmission, which can effectively block external ultraviolet rays and prevent attenuation of the excitation beam, thus affecting the detection.

[0016] 3. In this utility model, through the setting of the annular support member, a fixed plate is fixedly connected to the lower end inside the light source conversion device, and an annular support member is fixedly connected to the middle of the lower end inside the light source conversion device. When the rotating table rotates, it is supported by the annular support member to ensure the stability of the rotation of the rotating table. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view of a water quality COD detection device based on multi-source spectrum fusion of the present utility model;

[0018] Figure 2 is the top view of the present utility model;

[0019] Figure 3 is the top cross-sectional view of the present utility model;

[0020] Figure 4 is the front cross-sectional view of the present utility model.

[0021] In the figure: 1. Integrated spectrometer; 101. Ultraviolet-visible light spectrometer; 102. Three-dimensional fluorescence spectrometer; 2. Light source conversion device; 201. Ultraviolet-visible light receiving port; 202. Ultraviolet-visible light incident port; 203. Three-dimensional fluorescence receiving port; 204. Three-dimensional fluorescence incident port; 205. Movable cover plate; 3. Fixed plate; 301. Annular support member; 302. Rotating table; 303. Rotating shaft; 304. Servo motor; 305. Semi-circular light shielding plate; 4. Ultraviolet-visible light receiving cover; 401. Ultraviolet-visible light guide cover; 402. Ultraviolet-visible light generating component; 5. Three-dimensional fluorescence receiving cover; 501. Three-dimensional fluorescence guide cover; 502. Three-dimensional fluorescence generating component; 6. Ultraviolet-resistant optical fiber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Please refer to Figures 1-4 , an embodiment provided by the present invention: A water quality COD detection device based on multi-source spectral fusion, including an integrated spectrometer 1, a light source conversion device 2 is arranged on one side of the integrated spectrometer 1, a UV-visible light spectrometer 101 is arranged at the rear end of one side inside the integrated spectrometer 1, a three-dimensional fluorescence spectrometer 102 is arranged at the front end of one side inside the integrated spectrometer 1, a UV-visible light receiving port 201 is arranged at the rear end of one side end face of the light source conversion device 2, a three-dimensional fluorescence receiving port 203 is arranged at the front end of one side end face of the light source conversion device 2, a three-dimensional fluorescence incident port 204 is arranged at the rear end of the other side end face of the light source conversion device 2, a UV-visible light incident port 202 is arranged at the front end of the other side end face of the light source conversion device 2, a three-dimensional fluorescence generating component 502 is connected to the rear end of one side of the light source conversion device 2, a UV-visible light generating component 402 is connected to the front end of one side of the light source conversion device 2, a fixing plate 3 is fixedly connected to the lower end inside the light source conversion device 2, a circular support 301 is fixedly connected to the middle of the lower end inside the light source conversion device 2, a rotating table 302 is rotatably arranged in the middle of the fixing plate 3, and semi-circular light-shielding plates 305 are fixedly connected to both sides of the upper end of the rotating table 302.

[0024] Furthermore, a UV-visible light receiving cover 4 is connected to the outside of the UV-visible light receiving port 201, a UV-visible light light guide cover 401 is connected to the outside of the UV-visible light incident port 202, the UV-visible light receiving port 201 and the UV-visible light incident port 202 are arranged in a counter-supporting manner, so that the UV-visible light enters the UV-visible light receiving cover 4 from the UV-visible light receiving port 201 after entering from the UV-visible light incident port 202 through the UV-visible light light guide cover 401.

[0025] Furthermore, a three-dimensional fluorescence receiving cover 5 is connected to the outside of the three-dimensional fluorescence receiving port 203, a three-dimensional fluorescence light guide cover 501 is connected to the outside of the three-dimensional fluorescence incident port 204, the three-dimensional fluorescence receiving port 203 and the three-dimensional fluorescence incident port 204 are arranged in a counter-supporting manner, so that the three-dimensional fluorescence enters the three-dimensional fluorescence receiving cover 5 from the three-dimensional fluorescence receiving port 203 after entering from the three-dimensional fluorescence incident port 204 through the three-dimensional fluorescence light guide cover 501.

[0026] Furthermore, between the UV-visible light guide cover 401 and the UV-visible light generating component 402, between the three-dimensional fluorescence light guide cover 501 and the three-dimensional fluorescence generating component 502, between the UV-visible light receiving cover 4 and the UV-visible light spectrometer 101, and between the three-dimensional fluorescence receiving cover 5 and the three-dimensional fluorescence spectrometer 102, they are all connected by anti-UV optical fibers 6. The beam is transmitted through the anti-UV optical fibers 6, which can effectively block external ultraviolet rays, prevent attenuation of the excitation beam, and affect the detection.

[0027] Furthermore, the UV-visible light generating component 402 is composed of a UV-visible light source and a light attenuator, and the three-dimensional fluorescence generating component 502 is composed of a three-dimensional fluorescence source and a spectroscopic system.

[0028] Furthermore, a rotating shaft 303 is fixedly connected to the middle of the lower end of the rotating table 302. Inside the integrated spectrometer 1, a servo motor 304 is arranged at the lower end of the light source conversion device 2. The upper end of the light source conversion device 2 is connected with a movable cover plate 205, so that the rotating table 302 can rotate. When the rotating table 302 rotates, it is supported by an annular support 301 to ensure the stability of the rotation of the rotating table 302. By rotating the rotating table 302, the semi-circular light blocking plate 305 closes the symmetric openings on both sides of the side end face of the light source conversion device 2, and the symmetric openings on the other side communicate through the space between the two semi-circular light blocking plates 305.

[0029] Furthermore, the lower end of the rotating shaft 303 passes through the light source conversion device 2 and extends into the integrated spectrometer 1 and is fixedly connected to the output shaft of the servo motor 304. The rotating table 302 is driven to rotate by the servo motor 304.

[0030] Working principle: During use, a light source conversion device 2 is arranged on one side of the integrated spectrometer 1. The rear end on one side of the light source conversion device 2 is connected to a three-dimensional fluorescence generating component 502, and the front end on one side of the light source conversion device 2 is connected to an ultraviolet-visible light generating component 402. Open the movable cover plate 205 on the light source conversion device 2, place the cuvette on the upper end of the turntable 302, and then cover the movable cover plate 205 again. When first performing ultraviolet-visible light detection, drive the turntable 302 to rotate through the servo motor 304. As the turntable 302 rotates, the two semi-circular light shielding plates 305 close the three-dimensional fluorescence receiving ports 203 and three-dimensional fluorescence incident ports 204 that are symmetrically arranged on both sides of the side end surface of the light source conversion device 2, and make the symmetric ultraviolet-visible light receiving ports 201 and ultraviolet-visible light incident ports 202 on the other side communicate through the space between the two semi-circular light shielding plates 305. After being emitted by the ultraviolet-visible light source of the ultraviolet-visible light generating component 402 and attenuated by the optical attenuator, the light passes through the anti-ultraviolet optical fiber 6, enters from the ultraviolet-visible light incident port 202 through the ultraviolet-visible light light guide cover 401, passes through the cuvette, and then enters the ultraviolet-visible light receiving cover 4 from the ultraviolet-visible light receiving port 201. The ultraviolet-visible light receiving cover 4 then transmits it to the ultraviolet-visible light spectrometer 101 through the anti-ultraviolet optical fiber 6 for analysis. When fluorescence spectrum detection is required, rotate the turntable 302 again to make the two semi-circular light shielding plates 305 close the ultraviolet-visible light receiving ports 201 and ultraviolet-visible light incident ports 202 that are symmetrically arranged on both sides of the side end surface of the light source conversion device 2, and make the symmetric three-dimensional fluorescence receiving ports 203 and three-dimensional fluorescence incident ports 204 on the other side communicate through the space between the two semi-circular light shielding plates 305. After being emitted by the three-dimensional fluorescence source of the three-dimensional fluorescence generating component 502 and separated into a series of narrow lights (for irradiating and exciting fluorescence for the sample to be measured for each wavelength band) by the spectroscopic system, the light passes through the anti-ultraviolet optical fiber 6, enters from the three-dimensional fluorescence incident port 204 through the three-dimensional fluorescence light guide cover 501, passes through the cuvette, and then enters the three-dimensional fluorescence receiving cover 5 from the three-dimensional fluorescence receiving port 203. The three-dimensional fluorescence receiving cover 5 then transmits it to the three-dimensional fluorescence spectrometer 102 through the anti-ultraviolet optical fiber 6 for analysis, realizing different light source spectrum detections with the same instrument.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A water quality COD detection device based on multi-source spectral fusion, comprising an integrated spectrometer (1), characterized in that: On one side of the integrated spectrometer (1), there is a light source conversion device (2). At the rear end of one side inside the integrated spectrometer (1), there is an ultraviolet-visible light spectrometer (101). At the front end of one side inside the integrated spectrometer (1), there is a three-dimensional fluorescence spectrometer (102). At the rear end of one side end face of the light source conversion device (2), there is an ultraviolet-visible light receiving port (201). At the front end of one side end face of the light source conversion device (2), there is a three-dimensional fluorescence receiving port (203). At the rear end of the other side end face of the light source conversion device (2), there is a three-dimensional fluorescence incident port (204). At the front end of the other side end face of the light source conversion device (2), there is an ultraviolet-visible light incident port (202). At the rear end of one side of the light source conversion device (2), there is a three-dimensional fluorescence generating component (502) connected. At the front end of one side of the light source conversion device (2), there is an ultraviolet-visible light generating component (402) connected. At the lower end inside the light source conversion device (2), there is a fixed plate (3) fixedly connected. In the middle of the lower end inside the light source conversion device (2), there is an annular support (301) fixedly connected. In the middle of the fixed plate (3), there is a rotating table (302) rotatably arranged. On both sides of the upper end of the rotating table (302), there are semi-circular light-shielding plates (305) fixedly connected.

2. The water quality COD detection device based on multi-source spectral fusion according to claim 1, wherein: Outside the ultraviolet-visible light receiving port (201), there is an ultraviolet-visible light receiving cover (4) connected. Outside the ultraviolet-visible light incident port (202), there is an ultraviolet-visible light light guide cover (401) connected.

3. The water quality COD detection device based on multi-source spectral fusion according to claim 2, wherein: Outside the three-dimensional fluorescence receiving port (203), there is a three-dimensional fluorescence receiving cover (5) connected. Outside the three-dimensional fluorescence incident port (204), there is a three-dimensional fluorescence light guide cover (501) connected.

4. The water quality COD detection device based on multi-source spectral fusion according to claim 3, wherein: Between the ultraviolet-visible light light guide cover (401) and the ultraviolet-visible light generating component (402), between the three-dimensional fluorescence light guide cover (501) and the three-dimensional fluorescence generating component (502), between the ultraviolet-visible light receiving cover (4) and the ultraviolet-visible light spectrometer (101), and between the three-dimensional fluorescence receiving cover (5) and the three-dimensional fluorescence spectrometer (102), they are all connected by ultraviolet-resistant optical fibers (6).

5. The water quality COD detection device based on multi-source spectral fusion according to claim 1, characterized in that: The ultraviolet-visible light generating component (402) is composed of an ultraviolet-visible light source and a light attenuator. The three-dimensional fluorescence generating component (502) is composed of a three-dimensional fluorescence source and a spectroscopic system.

6. The water quality COD detection device based on multi-source spectral fusion according to claim 1, characterized in that: In the middle of the lower end of the rotating table (302), there is a rotating shaft (303) fixedly connected. Inside the integrated spectrometer (1) and at the lower end of the light source conversion device (2), there is a servo motor (304) arranged. At the upper end of the light source conversion device (2), there is a movable cover plate (205) connected.

7. The water quality COD detection device based on multi-source spectral fusion according to claim 6, characterized in that: The lower end of the rotating shaft (303) passes through the light source conversion device (2) and extends to the inside of the integrated spectrometer (1) and is fixedly connected to the output shaft of the servo motor (304).

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