Detection device

Abstract

The utility model provides a detection device which can meet the requirement for high-sensitivity detection and improve the signal-to-noise ratio of an optical path. The detection device comprises a multi-core light source used for emitting light, and the multi-core light source comprises a plurality of lamp wicks integrated on a substrate and emitting light with at least two wavelengths; water to be detected passes through the detection area or is contained in the detection area, and the light rays partially enter the water to be detected; the first spectrum sensor is at least used for receiving detection light generated after light rays enter water to be detected; the first spectrum sensor comprises a quantum dot light splitting sheet which comprises a plurality of quantum dot light splitting areas used for light splitting; the quantum dot light filtering film is used for filtering light rays emitted from the multi-core light source and allowing detection light to pass through; the detector receives the detection light and monitors water based on the detection light, the quantum dot light splitting sheet is located on the receiving side of the detector, and the quantum dot light filtering film is located on the side, opposite to the detector, of the quantum dot light splitting sheet.

Description

Technical Field

[0001] This utility model relates to a detection device, specifically, a detection device for monitoring the water environment. Background Technology

[0002] With the development of key industries such as petrochemicals, pesticides, organic chemical raw material manufacturing, and coking, the organic pollutants generated during their production processes are complex in composition and highly toxic, potentially causing significant impacts on the aquatic environment. These organic pollutants may exist in various forms in water, including dissolved, colloidal, and suspended states, and their concentration and type may vary with time and space. Therefore, rapid and accurate monitoring and assessment of organic pollutants in water bodies are of great importance for protecting the aquatic environment and public health.

[0003] Currently, the detection of organic pollutants mostly employs traditional laboratory methods such as mass spectrometry-chromatography. While these methods are accurate and reliable, they suffer from drawbacks such as high cost and low efficiency, failing to meet the need for high-frequency monitoring of water quality trends related to organic pollutants. Therefore, optical monitoring technology, with its advantages of ease of operation, no reagent consumption, good repeatability, high measurement accuracy, and rapid detection, has become a hot topic in water quality monitoring research both domestically and internationally in recent years.

[0004] However, current optical monitoring technologies still have some limitations in the detection of organic pollutants. For example, some organic pollutants have weak light absorption, resulting in low detection sensitivity; in addition, background interference and complex matrices in water bodies can also affect the detection results. Therefore, in order to improve the accuracy and reliability of optical monitoring technologies in the detection of organic pollutants, further research and development of new detection methods and technologies are needed.

[0005] Patent Document 1 provides a multispectral sensor that uses an integrated LED light source to generate light within a specific frequency range to simultaneously detect multiple components. However, Patent Document 1 still has room for improvement in sensitivity.

[0006] Existing technical documents

[0007] Patent Document 1: Chinese Invention Patent Application CN117990634A Utility Model Content

[0008] Problems to be solved by utility models

[0009] The purpose of this invention is to provide a detection device that can meet the requirements of high-sensitivity detection and improve the optical signal-to-noise ratio.

[0010] Solution for solving the problem

[0011] This utility model provides a detection device for monitoring the water environment. The device comprises: a multi-core light source for emitting light, the multi-core light source including: a substrate, multiple lamp cores integrated on the substrate, the multiple lamp cores including at least two wavelengths; a detection zone, through which water to be detected passes or is contained, and where the light emitted from the multi-core light source partially enters the water to be detected; a first spectral sensor for receiving detection light generated after the light emitted from the multi-core light source enters the water to be detected; the first spectral sensor including: a quantum dot beam splitter including multiple quantum dot beam splitting regions for beam splitting; a quantum dot filter for filtering out the light emitted from the multi-core light source while allowing the detection light to pass through; and a detector for receiving the detection light and monitoring the water based on the detection light, the quantum dot beam splitter being located on the receiving side of the detector, and the quantum dot filter being located on the side of the quantum dot beam splitter opposite to the detector.

[0012] Preferably, the detection area includes a first window and a second window. The first window allows light emitted from the multi-core light source to pass through, so that the light enters the water inside the detection area. The second window allows detection light to pass through, and the detection light illuminates the first spectral sensor after passing through the second window.

[0013] Preferably, the detection light is fluorescence excited by the light beam entering the water to be detected and / or scattered light formed by the scattering of the light beam; and / or, the first spectral sensor includes at least two detection areas, each corresponding to receiving different detection lights; and / or, the spacing between adjacent lamp cores is 150μm to 300μm.

[0014] Preferably, the quantum dot filter film integrates multiple filtering regions, which are capable of filtering light in at least two wavelength bands; and / or, the area of ​​the quantum dot beam splitter is larger than the area of ​​the quantum dot filter film.

[0015] Preferably, in the multi-core light source, the lamp core with low excitation fluorescence efficiency is located closer to the center of the multi-core light source than the lamp core with high excitation fluorescence efficiency, or / and the centerline of the receiving end of the first spectral sensor forms a set angle with the direction in which the light enters the detection area from the multi-core light source, and the first spectral sensor is located on the side of the second window opposite to the detection area.

[0016] Preferably, the detection device further includes a lens, which is located upstream of the first window in the direction in which the light enters the detection area from the multi-core light source, to expand the field of view of the light.

[0017] Preferably, the detection device further includes a second spectral sensor, and the detection area further includes a third window. In the direction in which the light enters the detection area from the multi-core light source, the third window allows the light that has entered the interior of the detection area via the first window to exit to the exterior of the detection area. In the direction in which the light enters the detection area from the multi-core light source, the second spectral sensor is located downstream of the third window.

[0018] Preferably, the detection device further includes a beam splitter and a light intensity detector. In the direction in which the light rays enter the detection area from the multi-core light source, the beam splitter is located upstream of the first window. The beam splitter causes a portion of the light rays emitted by the multi-core light source to be reflected and illuminate the light intensity detector. The light intensity detector is used to detect the intensity of the light rays. The light rays emitted by the multi-core light source partially pass through the beam splitter and illuminate the first window, and then enter the detection area.

[0019] Preferably, the detection device further includes: a first beam splitter, a first reflector, a second beam splitter, and a shielding member. In the irradiation direction in which light from the multi-core light source enters the detection area, the first beam splitter is located upstream of the first window. Part of the light emitted from the multi-core light source is reflected by the first beam splitter to the first reflector, and part of the light emitted from the multi-core light source passes through the first beam splitter and enters the first window. The first reflector is configured to reflect the light reflected by the first beam splitter to the second beam splitter. Part of the light reflected by the first reflector and illuminating the second beam splitter is reflected by the second beam splitter and then enters the first spectral sensor. Part of the light reflected by the first reflector and illuminating the second beam splitter, after passing through the second beam splitter, irradiates in a direction that will not enter the interior of the detection area. The shielding member can move between a first shielding position and a second shielding position. At the first shielding position, the shielding member shields the light passing through the first beam splitter, and at the second shielding position, the shielding member shields the light reflected by the first reflector.

[0020] Preferably, the detection device further includes: a second reflector, a third beam splitter, a second spectral sensor, and a third window. In the direction in which light enters the detection area from the multi-core light source, the third window allows light entering the interior of the detection area via the first window to exit to the exterior of the detection area. In the irradiation direction in which light enters the detection area from the multi-core light source, the third beam splitter is located downstream of the third window. The second reflector is configured to reflect light passing through the second beam splitter to the third beam splitter. The third beam splitter is configured to either reflect light reflected from the second reflector to the second spectral sensor, or allow light exiting from the detection area via the third window to pass through and enter the second spectral sensor.

[0021] Effects of the utility model

[0022] The detection device provided in this application can meet the requirements of high-sensitivity detection and improve the optical signal-to-noise ratio. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a multi-core light source according to an embodiment of the detection device of this application.

[0024] Figure 2 This is a schematic diagram of the quantum dot filter film of the first spectral sensor in one embodiment of the detection device of this application.

[0025] Figure 3 This is a schematic diagram of one embodiment of the detection device of this application.

[0026] Figure 4 This is a schematic diagram of a reference path for a modified example of the detection device of this application.

[0027] Figure 5 This is a schematic diagram of the detection path of a modified example of the detection device of this application.

[0028] Figure 6 This is a schematic diagram of the detection area of ​​the detection device of this application.

[0029] Explanation of reference numerals in the attached figures

[0030] 100. Detection device; 1. Multi-core light source; 2. Beam splitter; 3. Light intensity detector; 4. Lens; 5. First window; 6. Second window; 7. First spectral sensor; 8. Detection area; 9. Third window; 10. Second spectral sensor; F. Filter; f. Filtering area; L. Light ray; FL. Fluorescence; SL. Scattered light;

[0031] 100' Detection device; 11 Utility light source; 12 Lens; 13 First beam splitter; 14 First reflector; 15 Second beam splitter; 16 First spectral sensor; 18 Second reflector; 19 Third beam splitter; 20 Second spectral sensor; 21 Shielding component. Detailed Implementation

[0032] The detection device of this utility model will be described below based on the accompanying drawings. This description is not intended to limit the scope of this application, and various modifications can be made within the scope of the claims.

[0033] <Example>

[0034] Figure 1 This is a schematic diagram of a multi-core light source in an embodiment of the detection device. For example... Figure 1 As shown, the multi-core light source 1 adopts multi-core integration, integrating multiple wavelength LED chips onto the same substrate to improve LED integration. The wavelengths can be integrated into multiple bands according to detection requirements. The multiple LED chips include at least two wavelengths.

[0035] Among them, the control of different LED chips in the substrate can achieve multiple modes such as simultaneous lighting, single lighting, and lighting of a few chips according to the circuit layout; the wavelength of the light emitted by the LED chip can be any combination of wavelengths such as 255, 265, 275, 285, 295, 310, 365, etc., and the positions of LED chips emitting different wavelengths can be interchanged.

[0036] Multi-core light sources typically employ a structure where LED chips of different wavelengths are individually packaged and then integrated onto a substrate. In contrast, most single ultraviolet LEDs on the market are packaged in a 3.5×3.5cm package. The multi-core integration method can further shorten the chip spacing, and a 6-core package can achieve a 5.15×5.15cm package, making the light emission more concentrated at the center of the optical axis. Through optical path design, the light energy utilization rate can be further improved, and the excitation light intensity for organic matter detection can be increased.

[0037] Since the fluorescence efficiency of materials varies for different wavelengths, the wavelengths with lower excitation efficiency can be placed closer to the center. That is, the LED chips with lower excitation fluorescence efficiency are placed closer to the center of the multi-core light source 1 than the LED chips with higher excitation fluorescence efficiency. The spacing between adjacent LED chips can be 150–300 μm. For example, it can be 150 μm, 156 μm, 162 μm, 170 μm, 180 μm, 200 μm, 230 μm, 260 μm, 300 μm, etc., which will not be elaborated here.

[0038] Figure 2 This is a schematic diagram of the quantum dot filter film in an embodiment of the detection device. Figure 2As shown, the quantum dot filter film includes multiple filtering regions f(f1~f2). n Multiple filter regions f(f1~f) n It can filter light in at least two wavelengths, that is, multiple filtering regions f correspond to the wavelengths of light emitted from the multi-core light source 1, and can filter out light L emitted from the multi-core light source 1. Alternatively, the area of ​​the quantum dot filter film is smaller than the area of ​​the quantum dot beam splitter, that is, a quantum dot filter film is not placed in front of a part of the quantum dot beam splitter.

[0039] Quantum dot filter F utilizes integrated design of quantum dot materials to form the filter, further reducing probe size and power consumption. The detector area can be rationally divided according to the spectral detection requirements of organic matter, such as... Figure 2 As shown, the filtering regions f on the left and right sides of the quantum dot filter film F are not symmetrically arranged. That is, the multiple filtering regions f in the quantum dot filter film F can be equally or unequally divided, and can be arranged symmetrically or asymmetrically. The specific arrangement can be reasonably set by those skilled in the art according to actual needs.

[0040] The quantum dot filter F has been described above. Next, the first spectral sensor 7 with the quantum dot filter F will be described.

[0041] The first spectral sensor 7 is a sensor that detects water by receiving detection light. Here, the detection light refers to the light emitted from the multi-core light source 1 after it enters the water. The detection light can be fluorescence FL excited by the light L emitted from the multi-core light source 1 entering the water to be detected and / or scattered light SL formed by the scattering of the light L. The first spectral sensor 7 may include at least two detection areas, each corresponding to receiving different detection lights. Specifically, one detection area may be used to receive fluorescence, and the other detection area may be used to receive scattered light.

[0042] The first spectral sensor 7 includes a quantum dot filter F, a quantum dot beam splitter, and a detector in sequence. That is, the detection light received by the first spectral sensor 7 passes through the quantum dot filter F, the quantum dot beam splitter, and the detector in sequence. As mentioned above, the quantum dot filter F filters out the light L emitted from the multi-core light source 1 and allows the detection light to pass through. Therefore, even if a portion of the light L is incident on the first spectral sensor 7 along with the detection light, the quantum dot filter F can reliably filter out the light L emitted from the multi-core light source 1, avoiding the influence (noise) caused by the light L.

[0043] The detection light, after passing through the quantum dot filter F, illuminates a quantum dot beam splitter. The quantum dot beam splitter comprises multiple quantum dot beam splitting regions for light dispersion, and may also include quantum dot-free regions. This allows for the dispersion of the detection light, separating different wavelengths or bands and their corresponding intensities, thus meeting the needs of the detector to identify the components of an object.

[0044] The detector receives the detection light and monitors the water based on the detection light. In order for the detection light received by the first spectral sensor 7 to pass sequentially through the quantum dot filter F, the quantum dot beam splitter, and the detector, the quantum dot beam splitter is located on the receiving side of the detector, and the quantum dot filter F is located on the side of the quantum dot beam splitter opposite to the detector.

[0045] Figure 3 This is a schematic diagram of an embodiment of the detection device. The detection device 100 is used to monitor the aquatic environment.

[0046] like Figure 3 As shown, the detection device 100 has a detection area 8. The detection area 8 may not contain the water to be detected. Instead, the water to be detected is allowed to flow through the detection area 8 by placing the detection device 100 at least partially in the water. Alternatively, the detection area 8 may be configured as a detection chamber to contain the water to be detected inside the detection area 8, and light L emitted from the multi-core light source 1 may partially enter the water to be detected.

[0047] like Figure 3 As shown, the detection area 8 includes a first window 5 and a second window 6. The first window 5 allows light L emitted from the multi-core light source 1 to pass through, so that the light L enters the water inside the detection area 8. The second window 6 allows detection light to pass through, and the detection light illuminates the first spectral sensor 7 after passing through the second window 6.

[0048] Preferably, the second window 6 is located on the upper side of the detection area 8, and the first spectral sensor 7 is located on the upper side of the second window 6.

[0049] like Figure 3 As shown, the detection device 100 also includes a beam splitter 2 and a light intensity detector 3. In the direction in which the light ray L enters the detection area 8 from the multi-core light source 1, the beam splitter 2 is located upstream of the first window 5. The beam splitter 2 can separate the incident light (light ray L) into reflected light and transmitted light. The beam splitter 2 causes a portion of the light ray L emitted by the multi-core light source 1 to be reflected and illuminate the light intensity detector 3. The light intensity detector 3 is used to detect the intensity of the light ray L. The light ray L emitted by the multi-core light source 1 partially passes through the beam splitter 2 and illuminates the first window 5, and then enters the detection area 8.

[0050] like Figure 3As shown, the detection device 100 also includes a lens 4. In the direction in which light L enters the detection area 8 from the multi-core light source 1, the lens 4 is located upstream of the first window 5 to expand the field of view of light L. The detection device 100 also includes a second spectral sensor 10, and the detection area 8 includes a third window 9. In the direction in which light L enters the detection area 8 from the multi-core light source 1, the third window 9 allows light L that has entered the interior of the detection area 8 via the first window 5 to exit to the exterior of the detection area 8. In the direction in which light L enters the detection area 8 from the multi-core light source 1, the second spectral sensor 10 is located downstream of the third window 9. Therefore, light emitted from the third window 9 can enter the second spectral sensor 10.

[0051] like Figure 6 As shown, the first window 5 and the third window 9 are opposite each other along the direction of light ray L. The second window 6 can be positioned such that it marks the center line O of the receiving end of the first spectral sensor 7. This center line O is, for example, when viewed along a direction orthogonal to light ray L (e.g.) Figure 6 (As shown in the viewpoint), the center line O is at a set angle relative to the direction in which the light L enters the detection area 8 from the multi-core light source 1, relative to an imaginary line orthogonal to the receiving end of the first spectral sensor 7. This set angle is in the range of 45° to 135°, preferably 90°. The first spectral sensor 7 is located on the side of the second window 6 opposite to the detection area 8.

[0052] The detection operation of the detection device 100 according to the embodiment will be described below.

[0053] The water to be tested is contained in the detection area 8 (or the water can flow through the detection area 8). Multiple wavelengths or bands of light L are emitted from the multi-core light source 1. The light L enters the beam splitter 2 and is reflected by the beam splitter 2 to the light intensity sensor 3. The light intensity sensor 3 detects the intensity of the light L that just entered, using it as the baseline light intensity. Since the light source attenuates with use, the accuracy of the baseline light intensity can be improved by repeatedly detecting the light intensity of the light source using the light intensity sensor 3, thereby improving the accuracy of the detection.

[0054] Furthermore, since light intensity is correlated with spectral detection, the baseline light intensity detected by the light intensity sensor 3 can also be used as a benchmark. After the spectrum is detected by the first spectral sensor 7 (described later), the components in the water can be identified more accurately based on the baseline light intensity.

[0055] When light L enters the beam splitter 2, in addition to some light L being reflected by the beam splitter 2 to the light intensity sensor 3, some light L is transmitted through the beam splitter 2 and reaches the lens 4. The lens 4 is used to expand the field of view of light L. The light L passing through the lens 4 enters the first window 5 parallel to each other, and enters the detection area 8 through the first window 5, thereby irradiating the water in the detection area 8.

[0056] When light L irradiates water, or more precisely, when it irradiates impurities in the water, it excites fluorescence FL or scatters scattered light SL. Hereinafter, fluorescence FL and scattered light SL are collectively referred to as detection light. The detection light is emitted in a direction intersecting with light L (e.g., upwards in this embodiment), passing through the second window 6 and exiting from the detection area 8. In the direction of detection light emission, the first spectral sensor 7 is located downstream of the second window 6. Therefore, the detection light emitted from the second window 6 enters the first spectral sensor 7, which detects the light. The detection light incident on the first spectral sensor 7 sequentially passes through the quantum dot filter F, the quantum dot beam splitter, and the detector. This has been mentioned in the previous description concerning the first spectral sensor 7 and is omitted here.

[0057] like Figure 3 As shown, a portion of the light L does not excite fluorescence FL or become scattered light SL, but instead passes through the detection area 8 as transmitted light. This transmitted light exits the detection area 8 via the third window 9 and then enters the second spectral sensor 10, where it detects the transmitted light L. Therefore, in this embodiment, the first spectral sensor 7 can detect the spectrum of fluorescence or scattered light, and the second spectral sensor 10 can detect the spectrum of transmitted light.

[0058] <Effects of the Example>

[0059] Based on this embodiment, the following effects can be achieved.

[0060] By employing a multi-core light source, light energy utilization can be improved, the integration of the light source can be increased, and a large numerical aperture mirror group can be used. This enriches the fluorescence excitation light source wavelength range, enabling multi-wavelength LED integration through multi-core integration.

[0061] By incorporating a quantum dot filter F in the first spectral sensor 7, stray light is reduced, and the integrated quantum dot spectral filter reduces the influence of the light source. Specifically, it prevents the light L (excitation light) directly emitted by the multi-core light source 1 from illuminating the quantum dot spectrometer. This allows light (typically fluorescence) that has passed through organic matter (impurities) in the water to pass through. This improves the accuracy of the detector in identifying the composition of the sample (water). Traditional spectrometers require a dichroscope to filter out the excitation light (the light L directly emitted by the light source). However, the dichroscope has high requirements for the incident angle of the excitation light to be filtered, requiring sufficient space to adjust the setting angle of the dichroscope, or setting the dichroscope separately at different angles. The quantum dot filter F of this application has lower requirements for the incident angle, saving space in comparison. Therefore, the detection device of this application is portable and can adapt to in-situ detection requirements (i.e., detection directly in the liquid to be detected, without needing to extract the liquid to the shore or other containers for detection), improving the efficiency of substance identification.

[0062] For the water to be tested, a multi-core light source 1 emits excitation light of different wavelengths, which sequentially irradiate the sample (water). The sample emits fluorescence after being irradiated by the excitation light. The fluorescence bands or wavelengths can be different. After multiple fluorescences of different bands or wavelengths are individually irradiated onto the first spectral sensor 7, a quantum dot spectrometer is used to separate the multiple fluorescences into multiple narrower wavelength bands, facilitating subsequent light analysis and detection.

[0063] As described above, by integrating the multi-core light source 1 and filtering with the quantum dot filter film F, the influence of stray light is reduced while enriching the light source. This improves the detection sensitivity and the signal-to-noise ratio of the optical path, enabling the detection of multiple components in water.

[0064] In addition to using the first spectral sensor 7 to detect the spectrum of fluorescence or scattered light, the second spectral sensor 10 is also used to detect the spectrum of transmitted light. Therefore, water can be detected from multiple aspects, the sensitivity can be further improved, and multiple components in the water can be detected.

[0065] <Variation Example>

[0066] exist Figure 4 and Figure 5 The structure of a modified example of this utility model is shown in the figure. Figure 4 This is a schematic diagram of the reference path of the detection device 100' as a modified example. Figure 5 This is a schematic diagram of the detection path of the detection device 100' as a modified example. The modified detection device 100' also has a detection area 8, in which a first window piece 5, a second window piece 6, and a third window piece 9 are provided.

[0067] like Figure 4 , Figure 5 As shown, the detection device 100' further includes: a first beam splitter 13, a first reflector 14, a second beam splitter 15, and a shielding member 21. In the irradiation direction of light L from the multi-core light source 1 into the detection area 8, the first beam splitter 13 is located upstream of the first window plate 5. After passing through the lens 12, part of the light emitted from the multi-core light source 11 is reflected by the first beam splitter 13 to the first reflector 14, and part of the light emitted from the multi-core light source 11 passes through the first beam splitter 13 and enters the first window plate 5.

[0068] The first reflecting mirror 14 is configured to reflect the light reflected by the first beam splitter 13 to the second beam splitter 15. A portion of the light reflected by the first reflecting mirror 14 that reaches the second beam splitter 15 is then reflected by the second beam splitter 15 and enters the first spectral sensor 16. The portion of the light reflected by the first reflecting mirror 14 that reaches the second beam splitter 15, after passing through the second beam splitter 15, is directed in a direction that will not penetrate the interior of the detection area 8 (as long as the light passing through the second beam splitter 15 does not enter the detection area 8).

[0069] like Figure 4 and Figure 5 As shown, the shielding member 21 can be in the first shielding position ( Figure 4 ) and the second shielding position ( Figure 5 Move between ) such as Figure 4 As shown, at the first shielding position, the shielding member 21 shields the light rays passing through the first beam splitter 13, such as... Figure 5 As shown, at the second shielding position, the shielding member 21 shields the light reflected by the first reflector 14.

[0070] like Figure 4 , Figure 5 As shown, the detection device 100' further includes: a second reflector 18, a third beam splitter 19, a second spectral sensor 20, and a third window 9. In the direction in which light L enters the detection area 8 from the multi-core light source 1, the third window 9 allows light that has entered the interior of the detection area 8 via the first window 5 to exit to the exterior of the detection area 8. In the irradiation direction in which light L enters the detection area 8 from the multi-core light source 1, the third beam splitter 19 is located downstream of the third window 9. The second reflector 18 is configured to reflect light that has passed through the second beam splitter 15 to the third beam splitter 19. The third beam splitter 19 is configured to either reflect light reflected by the second reflector 18 to the second spectral sensor 20, or allow light emitted from the detection area 8 via the third window 9 to pass through and enter the second spectral sensor 20.

[0071] Similar to beam splitter 2 in the embodiment, the first beam splitter 13, the second beam splitter 15, and the third beam splitter 19 are capable of separating incident light (including but not limited to light ray L) into reflected light and transmitted light. Whether it is beam splitter 2 in the embodiment or the first beam splitter 13, the second beam splitter 15, and the third beam splitter 19 in the modified example, they can be configured such that one side separates light into reflected light and transmitted light, while the other side allows light to pass through only.

[0072] The following describes the testing operation of the testing device 100' for the modified example.

[0073] The water to be tested is contained in the detection area 8 (or the structure allows the water to flow through the detection area 8), and the shielding member 21 is in the first shielding position. Then, multiple wavelengths or bands of light L are emitted from the multi-core light source 11. The light L enters the lens 12, and the field of view is expanded by the lens 12. The light L with the expanded field of view is then incident on the first beam splitter 13 in a roughly parallel manner.

[0074] A portion of the light ray L passes through the first beam splitter 13 but is blocked by the shielding member 21, thus preventing it from entering the first window 5 and consequently the detection area 8. Conversely, a portion of the light ray L is reflected by the first beam splitter 13 and strikes the first reflecting mirror 14, then shines through the first reflecting mirror 14 onto the second beam splitter 15. The light ray L is split into reflected light and transmitted light in the second beam splitter 15. The reflected light enters the first spectral sensor 16, and the transmitted light sequentially passes through the second reflecting mirror 18 and the third beam splitter 19 before entering the second spectral sensor 20.

[0075] Thus, the light emitted from the multi-core light source 11 passes through Figure 4 The reference paths shown are directed to the first spectral sensor 16 and the second spectral sensor 20, respectively. Light rays L that have not yet penetrated the water are directed to both the first spectral sensor 16 and the second spectral sensor 20. Therefore, the spectra of the light rays L that have not yet penetrated the water can be detected by the first spectral sensor 16 and the second spectral sensor 20, respectively, and used as a reference.

[0076] Then, as Figure 5 As shown, the shielding member 21 is moved to the second shielding position. Based on this, multiple wavelengths or bands of light L are emitted from the multi-core light source 11. The light L enters the lens 12, and the field of view is expanded by the lens 12. The light L with the expanded field of view is then irradiated approximately parallel to the first beam splitter 13.

[0077] A portion of the light ray L is reflected by the first beam splitter 13 and directed toward the first reflector 14, but is blocked midway by the shielding member 21. Therefore, the light ray L does not directly enter the first spectral sensor 16 and the second spectral sensor 20. Instead, after passing through the first beam splitter 13, the light ray L passes through the first window 5 and further enters the interior of the detection area 8.

[0078] Light L, inside the detection area 8, irradiates the water contained within it, exciting fluorescence FL or scattering scattered light SL. Hereinafter, fluorescence FL and scattered light SL are collectively referred to as detection light. The detection light is emitted in a direction intersecting with light L (e.g., upwards in a modified example), passing through the second window 6 from the detection area 8. In the direction of detection light emission, the first spectral sensor 16 is located downstream of the second window 6. Therefore, the detection light emitted from the second window 6 passes through the other side of the second beam splitter 15 and then enters the first spectral sensor 16, which detects the light. The first spectral sensor 16 in the modified example is the same as the first spectral sensor 7 in the embodiment, configured such that the detection light incident on the first spectral sensor 16 sequentially passes through the quantum dot filter F, the quantum dot beam splitter, and the detector. This has been mentioned in the previous description of the embodiments and is omitted here.

[0079] like Figure 5 As shown, a portion of the light L does not excite fluorescence FL or become scattered light SL, but instead passes through the detection area 8 as transmitted light. This transmitted light exits from the detection area 8 via the third window 9 and then enters the second spectral sensor 20, which detects the transmitted light L. Thus, in this modified example, the spectrum of fluorescence or scattered light can be detected using the first spectral sensor 7, and the spectrum of transmitted light can be detected using the second spectral sensor 10.

[0080] <Effect of the variation>

[0081] In the modified example, a multi-core light source 11 is provided, similar to the embodiment. And the first spectral sensor 16 is configured in the same manner as in the embodiment. Therefore, the modified example achieves the same effects as the embodiment.

[0082] Furthermore, since the modified example has a reference path and a detection path, the light L from the multi-core light source 11 can be detected more accurately before irradiating the water by switching to the reference path, using this as a reference. After obtaining a reliable reference, switching to the detection path and detecting the water, and correcting the detection results based on the aforementioned reference, allows for the acquisition of more accurate detection results.

Claims

1. A detection device for monitoring the aquatic environment, characterized in that, The detection device includes: A multi-core light source for emitting light, the multi-core light source comprising: a substrate, and multiple lamp cores integrated on the substrate, the multiple lamp cores comprising at least two wavelengths; The detection zone is where the water to be tested passes through or is contained within the detection zone, and light emitted from the multi-core light source partially enters the water to be tested. A first spectral sensor, at least for receiving detection light generated after light emitted from the multi-core light source enters the water to be detected; the first spectral sensor includes: a quantum dot beam splitter, comprising a plurality of quantum dot beam splitting regions for beam splitting; a quantum dot filter for filtering out light emitted from the multi-core light source and allowing the detection light to pass through; and a detector for receiving the detection light and monitoring the water based on the detection light, wherein the quantum dot beam splitter is located on the receiving side of the detector, and the quantum dot filter is located on the side of the quantum dot beam splitter opposite to the detector.

2. The detection device according to claim 1, characterized in that, The detection area includes a first window piece and a second window piece. The first window allows light emitted from the multi-core light source to pass through, enabling the light to penetrate the water inside the detection area. The second window allows the detection light to pass through, and the detection light illuminates the first spectral sensor after passing through the second window.

3. The detection device according to claim 1, characterized in that, The detection light is fluorescence excited by the light beam entering the water to be tested and / or scattered light generated by the scattering of the light beam; and / or, The first spectral sensor includes at least two detection areas, each corresponding to receiving different detection light; and / or, The spacing between adjacent lamp cores is 150μm to 300μm.

4. The detection device according to claim 1, characterized in that, The quantum dot filter film integrates multiple filtering regions, which are capable of filtering light in at least two wavelength bands; and / or, The area of ​​the quantum dot beam splitter is larger than the area of ​​the quantum dot filter film.

5. The detection device according to claim 2, characterized in that, In the multi-core light source, the wick with low fluorescence excitation efficiency is located closer to the center of the multi-core light source than the wick with high fluorescence excitation efficiency, or / and, The centerline of the receiving end of the first spectral sensor is at a set angle to the direction in which the light enters the detection area from the multi-core light source, and the first spectral sensor is located on the side of the second window opposite to the detection area.

6. The detection device according to claim 2, characterized in that, The detection device also includes a lens. In the direction in which the light rays enter the detection area from the multi-core light source, the lens is located upstream of the first window to expand the field of view of the light rays.

7. The detection device according to claim 2, characterized in that, The detection device further includes a second spectral sensor, and the detection area further includes a third window. In the direction in which the light enters the detection area from the multi-core light source, the third window allows the light that has entered the interior of the detection area via the first window to exit to the exterior of the detection area. In the direction in which the light enters the detection area from the multi-core light source, the second spectral sensor is located downstream of the third window.

8. The detection device according to any one of claims 2, 5 to 7, characterized in that, The detection device also includes a beam splitter and a light intensity detector. In the direction in which the light enters the detection area from the multi-core light source, the beam splitter is located upstream of the first window. The beam splitter reflects a portion of the light emitted by the multi-core light source, which then illuminates the light intensity detector. The light intensity detector detects the intensity of the light. The light emitted by the multi-core light source partially passes through the beam splitter and illuminates the first window, which then enters the detection area.

9. The detection device according to claim 2, characterized in that, The detection device further includes: a first beam splitter, a first reflecting mirror, a second beam splitter, and a shielding component. In the direction of light irradiation from the multi-core light source into the detection area, the first beam splitter is located upstream of the first window. Some of the light emitted from the multi-core light source is reflected by the first beam splitter to the first reflecting mirror, while some of the light emitted from the multi-core light source passes through the first beam splitter and enters the first window. The first reflector is configured to reflect the light rays reflected by the first beam splitter back to the second beam splitter. A portion of the light rays reflected by the first mirror and reaching the second beam splitter are then reflected again by the second beam splitter and enter the first spectral sensor; the portion of the light rays reflected by the first mirror and reaching the second beam splitter, after passing through the second beam splitter, illuminates in a direction that will not penetrate the interior of the detection area. The shielding member is movable between a first shielding position and a second shielding position. At the first shielding position, the shielding member shields the light rays passing through the first beam splitter. At the second shielding position, the shielding member shields the light rays reflected by the first reflector.

10. The detection device according to claim 9, characterized in that, The detection device further includes: a second reflecting mirror, a third beam splitter, a second spectral sensor, and a third window. In the direction in which the light enters the detection area from the multi-core light source, the third window allows light that has entered the interior of the detection area via the first window to exit to the exterior of the detection area. In the direction of light irradiation from the multi-core light source into the detection area, the third beam splitter is located downstream of the third window. The second reflector is configured to reflect light rays that have passed through the second beam splitter back to the third beam splitter. The third beam splitter is configured to either reflect light reflected from the second mirror to the second spectral sensor, or allow light emitted from the detection area via the third window to pass through and enter the second spectral sensor.

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