Water quality monitoring sensor and water quality monitoring equipment

Abstract

The utility model provides a water quality monitoring sensor which comprises the following components: a housing which comprises a window through which light can pass, a closed area which is formed in the housing, a detection area which is formed outside the housing, and a water sample to be detected which can flow through the detection area; the first light source module is arranged in the shell and used for providing first incident light, and the first incident light enters the water sample to be detected through the window; the photoelectric detector module is arranged in the shell and is used for receiving a light spot position when the first incident light reaches the photoelectric detector module after being refracted by the water sample to be detected, so that the light spot displacement of the first incident light is determined according to the light spot position and a preset position; and the water quality state monitoring module is electrically connected with the photoelectric detector module. According to the water quality monitoring sensor disclosed by the utility model, real-time, in-situ and on-line water quality monitoring can be carried out.

Description

Technical Field

[0001] The present application relates to the field of water environment monitoring, and in particular to a water quality monitoring sensor. Background Art

[0002] Water quality monitoring by spectroscopy is a common method in the field of water environment monitoring. Spectroscopy has been widely used in the field of water quality monitoring because of its rapid, non-destructive, easy operation and ability to provide multi-parameter information. The methods involved in the common water quality spectral monitoring equipment on the market mainly include: UV-visible spectroscopy: by measuring the absorption or transmission spectrum of water samples in the ultraviolet to visible light region (mainly 200-800nm ​​band, some can reach 200-1100nm band), organic matter, inorganic ions, etc. in water can be analyzed. For example, the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) in water can be determined. There is also fluorescence spectroscopy: by measuring the fluorescence emitted by certain substances in water samples after being irradiated with excitation light, organic pollutants, natural organic matter, etc. in water can be analyzed; but this method is limited by the type of substance, and some substances that do not have obvious fluorescence reactions within the detection range cannot be detected.

[0003] When monitoring water quality, the UV-visible absorption spectra of some organic matter in the water are not within the 200-1100nm range of common UV-visible spectrometers, and there is no obvious fluorescence reaction within the detection range, so it is impossible to obtain spectral information through commonly used water quality monitoring equipment to analyze and monitor the impact of such substances on water quality. When using traditional chemical analysis methods to detect abnormal conditions in the water environment caused by such organic matter, there are characteristics of long cycles and inability to achieve in-situ real-time monitoring. Therefore, the development of a water quality monitoring sensor for such substances that can meet the needs of real-time, in-situ, and online water quality monitoring is a technical problem that needs to be solved urgently in the field of water environment monitoring. In our research, we found that there are obvious differences in the refractive index of water containing such organic matter. Therefore, we considered obtaining water quality information of the water environment by in-situ real-time monitoring of the refractive index changes of the water environment.

[0004] But in the prior art:

[0005] Patent application number CN201010118898.4 discloses a multi-parameter water quality analysis device based on refraction. Through the cooperation of a water quality detection installation structure and a water quality analysis structure, the refractive index of multiple positions of the water quality sample to be tested is measured and calculated. However, the device mainly judges the uniformity of turbidity of the water body by the refractive index, which is difficult to meet the needs of water quality status detection.

[0006] Patents with application numbers CN202211323576.2 and CN201010297840.0 both disclose measurement methods and devices for monitoring refractive index. The container is placed on a vernier disk, the vernier disk is rotated, and the positional relationship between the container wall and the laser beam is adjusted to measure the refractive index or liquid concentration of the liquid. However, such devices require the sample to be placed in a detection container or detection position, which makes it difficult to achieve online and in-situ measurement of the refractive index of the liquid, and difficult to apply in the field of water environment to meet the requirements for online, in-situ, and real-time monitoring of water quality.

[0007] Therefore, it is necessary to provide a new water quality monitoring sensor that can monitor water quality in real time, in situ and online by monitoring the refractive index. Summary of the invention

[0008] In order to improve or solve at least one problem raised by the background technology, according to one embodiment of the present invention, a water quality monitoring sensor is provided, comprising:

[0009] A housing, comprising a window through which light can pass, a closed area being formed inside the housing, and a detection area being formed outside the housing, through which a water sample to be detected can flow;

[0010] A first light source module, which is disposed inside the housing and is used to provide a first incident light, wherein the first incident light enters the water sample to be tested through the window;

[0011] A photoelectric detector module, which is arranged inside the housing and is used to receive the spot position of the first incident light when it reaches the photoelectric detector module after being refracted by the water sample to be tested, so as to determine the spot displacement of the first incident light according to the spot position and a preset position, wherein the preset position refers to the spot position of the first incident light when it reaches the photoelectric detector module after being refracted by the standard water sample at a preset incident angle;

[0012] The water quality status monitoring module is electrically connected to the photoelectric detector module.

[0013] Furthermore, the window includes a first window and a second window, and the second window receives the first incident light that passes through the first window and the water sample to be tested, so that the first incident light reaches the photoelectric detector module through the second window.

[0014] Furthermore, it also includes a reflector for receiving the first incident light that passes through the first window and the water sample to be tested, and reflecting the first incident light to the second window, so that the first incident light reaches the photoelectric detector module through the second window.

[0015] Furthermore, it also includes an optical component, which is located inside the housing and is used to adjust the incident direction of the first incident light so that the first incident light enters the water sample to be tested through the first window.

[0016] Furthermore, the first window and the second window are arranged on the same side of the water sample to be tested or on two opposite sides of the water sample to be tested; when the first window and the second window are arranged on the same side of the water sample to be tested, they can be two independent windows, or can be connected to form an extended window.

[0017] Furthermore, the first light source module includes a laser generating module, the first incident light includes laser, and the center of the laser spot has a center mark.

[0018] Furthermore, it also includes a second light source module, which is arranged inside the shell; the window also includes a third window; the second light source module is used to provide a second incident light to the third window; the photodetector module is also used to receive the second incident light incident through the third window.

[0019] Furthermore, the second light source module is also used to provide a third incident light to the photodetector module, and the third incident light and the second incident light are parallel light. Furthermore, the third incident light is a reference light, and the second incident light is a detection light. The reference light does not pass through the water sample to be tested, and the detection light can pass through the water sample to be tested.

[0020] Furthermore, the photoelectric detector module includes a first detection area and a second detection area, the first detection area is used to receive the first incident light, and the second detection area is used to receive the second incident light and the third incident light.

[0021] According to another embodiment of the present invention, a water quality monitoring device is provided, which includes the water quality monitoring sensor described above.

[0022] Furthermore, the water quality monitoring device is also provided with an automatic cleaning component.

[0023] The water quality monitoring sensor can be deployed in the water environment to be tested, and the water sample to be tested can flow through the detection area. After the first incident light enters the water sample to be tested and is refracted, the photoelectric detector module receives the light spot displacement between the light spot position when the first incident light is incident and the preset position, and the refractive index information of the water sample can be obtained, thereby determining the water quality status information of the water sample to be tested, and realizing real-time, in-situ, and online water quality monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1A schematic structural diagram of a water quality monitoring sensor according to the first embodiment of the present application is shown.

[0025] Figure 2 A schematic structural diagram of a water quality monitoring sensor according to a second embodiment of the present application is shown.

[0026] Figure 3 A schematic structural diagram of a water quality monitoring sensor according to a third embodiment of the present application is shown.

[0027] Figure 4 A schematic structural diagram of a water quality monitoring sensor according to the fourth embodiment of the present application is shown.

[0028] Description of Reference Numerals

[0029] 10 water quality monitoring sensors;

[0030] 11 housing; 110 detection area; 111 window; 1111 first window; 1112 second window; 1113 third window;

[0031] 12 first light source module;

[0032] 13 photoelectric detector module;

[0033] 14 Water quality status monitoring module;

[0034] 15 reflector;

[0035] 16 second light source module;

[0036] 17 optical components. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0038] Water quality monitoring by spectroscopy is a common method in the field of water environment monitoring, but the UV-visible absorption spectra of some organic substances in water are not within the 200-1100nm range of common UV-visible spectrometers, and there is no obvious fluorescence reaction within the detection range, so it is impossible to obtain spectral data through common water quality monitoring equipment to analyze and monitor the impact of such substances on water quality. However, our research found that the refractive index of water containing such organic substances is significantly different.

[0039] Based on this, the present application provides a specific implementation of a water quality monitoring sensor.

[0040] like Figure 1As shown, a specific implementation of a water quality monitoring sensor of the present application, the water quality monitoring sensor 10 includes:

[0041] The housing 11 includes a window 111 through which light can pass. The interior of the housing forms a closed area. A detection area 110 is formed outside the housing 11. The water sample to be tested can flow through the detection area 110.

[0042] A first light source module 12 is disposed inside the housing 11 and is used to provide a first incident light 111 , and the first incident light enters the water sample to be tested through the window 111 ;

[0043] The photoelectric detector module 13 is arranged inside the housing 11 and is used to receive the spot position of the first incident light when it reaches the photoelectric detector module 13 after being refracted by the water sample to be tested, so as to determine the spot displacement of the first incident light according to the spot position and the preset position, wherein the preset position refers to the spot position of the first incident light when the first incident light reaches the photoelectric detector module 13 after being refracted by the standard water sample at a preset incident angle;

[0044] The water quality status monitoring module 14 is electrically connected to the photoelectric detector module 13 .

[0045] Among them, the water sample to be tested is a water sample in any water area that needs to be monitored for water quality in this embodiment. Any water area can be a river, lake, ocean, reservoir, drainage network, water supply network, groundwater... etc., and there is no limitation here. Water quality monitoring refers to the monitoring of organic matter in water areas, such as one or more organic matter including alcohols, aldehydes, ketones, phenols and / or acids. The shell 11 is a closed structure, which adopts an integrated design, has a more compact structure and higher stability. A detection area 110 is formed inside the shell 11. The detection area 110 is an area that can accommodate water in the water area when the water quality monitoring sensor 10 is arranged in any water area that needs to be monitored for water quality. The detection area 110 is an open area, and the open area can be a recessed structure formed on the outside of the shell 11, or a hole-like or hole-like structure formed on the outside of the shell 11, so that the water sample to be tested can flow through the detection area. The first light source module 12 may include a laser, an LED lamp or other light sources. When the first light source module 12 includes a laser, the first incident light is a laser; when the first light source module 12 is an LED lamp, the first incident light is a parallel light. The spot size of the laser or parallel light is such that it can form an image after passing through the water sample to be tested and refracting to reach the photodetector module 13. No restrictions are set here. For the purpose of accurate calculation of the spot displacement, the laser light source can select a laser with a spot size of 3-10 mm in diameter, for example, a laser with a spot size of 6 mm in diameter can be selected. The window 111 is used to isolate the water sample to be tested from contacting the first light source module 12 and other internal structures of the sensor while the first incident light passes through. The first incident light irradiates the light source incident window on the window 11, and the incident angle of the first incident light is determined according to the position where the first light source module 12 is set and the position of the light source incident window, so that the first incident light is refracted after entering the water sample to be tested. The photodetector module 13 can be a CCD, a CMOS, etc., and no restrictions are set here. The preset position refers to the position of the light spot when the first incident light passes through the standard water sample at a preset incident angle and refracts to reach the photodetector module 13. The standard water sample is a liquid that can be compared with the water sample to be tested, for example, it can be pure water, etc. There are no restrictions here. When the first incident light enters another medium from one medium, the light will be deflected. Therefore, after adjusting the appropriate incident angle, the first incident light will be refracted when it enters the water sample to be tested, and will also be refracted after it is emitted from the water sample to be tested, and then reach the photodetector module 13. At this time, the photodetector module 13 will receive the light spot position after the first incident light arrives. The photodetector module 13 can store the preset position, and the water quality status monitoring module 14 can also store the preset position. There are no restrictions here.The water quality status monitoring module 14 can obtain the spot displacement between the spot position after the first incident light arrives and the preset position, and calculate the refractive index information of the water sample to be tested according to the spot displacement, and then judge the water quality status according to the refractive index of the water sample to be tested, and obtain the monitoring result of the abnormal condition of the water quality of the water sample to be tested. The electrical connection relationship between the water quality status monitoring module and the photoelectric detector module can be a wireless connection or a wired connection, and there is no limitation here.

[0046] The technical solution of this embodiment arranges the water quality monitoring sensor in the water sample to be tested so that the water sample to be tested can automatically enter the detection area. At the same time, the first incident light can be refracted after entering the water sample to be tested and the monitoring status of the water sample to be tested can be determined according to the light spot displacement between the light spot position on the photoelectric detector module and the preset position, thereby realizing real-time, in-situ and online water quality monitoring.

[0047] In an optional manner, the window 111 further includes a first window 1111 and a second window 1112 , and the second window 1112 receives the first incident light that passes through the first window 1111 and the water sample to be tested, so that the first incident light reaches the photodetector module 13 through the second window 1112 .

[0048] The purpose of the first window 1111 and the second window 1112 is to isolate the water sample to be tested from contacting the internal components of the sensor, such as the first light source module 12, while allowing the first incident light to pass through them to enter the water sample to be tested or to be emitted from the water sample to be tested. The first window 1111 is the window through which the first incident light passes when entering the water sample to be tested, and the second window 1112 is the window through which the first incident light passes when leaving the water sample to be tested. The first window 1111 and the second window 1112 can be arranged on the same side of the water sample to be tested, or on different sides of the water sample to be tested. When the first window 1111 and the second window 1112 are arranged on the same side of the water sample to be tested, such as Figure 1 As shown, both windows can be arranged below the water sample to be tested or both windows can be arranged above the water sample to be tested; when the first window 1111 and the second window 1112 are arranged on different sides of the water sample to be tested, as shown in FIG. Figure 2 , 3 As shown, the first window 1111 can be arranged above the water sample to be tested, and the second window 1112 can be arranged below the water sample to be tested, that is, the first window 1111 and the second window 1112 are arranged on opposite sides.

[0049] In an optional manner, it also includes: a reflector 15 for receiving the first incident light that passes through the first window 1111 and the water sample to be tested, and reflecting the first incident light to the second window 1112, so that the first incident light reaches the photoelectric detector module 13 through the second window 1112.

[0050] Among them, the reflector 15 can be set outside the shell 11, and can also be set inside the shell 11. When the reflector is set inside the shell, a corresponding window area through which the reflected light can be emitted needs to be set. The window area can be combined with the incident window to form an integral window, or can be two independent windows. The purpose is that the first incident light is incident on the reflector 15 and emitted through the window 111, that is, the window 111 can include one or two.

[0051] like Figure 1 As shown, the reflector 15 is arranged on the opposite side of the first window 1111. At this time, the first window 1111 and the second window 1112 are arranged on the same side, and the first window 1111 and the second window 1112 can be arranged below the water sample to be tested. The first incident light passes through the first window 1111 and the water sample to be tested in sequence and is refracted before reaching the reflector 15. The first incident light after reflection passes through the water sample to be tested and the second window 1112 in sequence and is refracted before reaching the photoelectric detector module 13.

[0052] In an optional manner, an optical component 17 is further included, which is used to adjust the incident direction of the first incident light so that the first incident light passes through the first window 1111 and enters the water sample to be tested.

[0053] In a specific embodiment, the optical component is a reflective component. Figure 4 As shown, the optical component 17 is arranged on the left side of the first window 1111. At this time, the first window 1111 and the second window 1112 are arranged on the same side, that is, they can be arranged below the water sample to be tested. The first light source module emits a first incident light, and the optical component 17 receives the first incident light and reflects the first incident light to the first window 1111. The first incident light passes through the first window 1111 and the water sample to be tested in turn and is refracted before reaching the reflector 15. The first incident light after reflection passes through the water sample to be tested and the second window 1112 in turn and is refracted before reaching the photoelectric detector module 13. By setting the optical component 17, the first light source module can be arranged below the first window 1111, so that the overall structure of the water quality monitoring sensor is more compact, more miniaturized, and more convenient to use.

[0054] In an optional manner, the first window 1111 and the second window 1112 are arranged on the same side of the water sample to be tested or on two opposite sides of the water sample to be tested.

[0055] The first window 1111 and the second window 1112 are arranged on both sides of the water sample to be tested, and they can be arranged opposite to each other, or they can be arranged on both sides but not opposite to each other; the first window 1111 and the second window 1112 are arranged on the opposite sides of the water sample to be tested, and they can be arranged in parallel in an inclined manner on the opposite sides of the water sample to be tested, or they can be arranged on two opposite surfaces that are not parallel, for example: according to the shape of the shell, in this case, the water sample to be tested is in the space area between the two non-parallel surfaces. When the first window 1111 and the second window 1112 are arranged opposite to each other with respect to the water sample to be tested, such as Figure 2 As shown, the first window 1111 can be arranged above the water sample to be tested, and the second window 1112 can be arranged below the water sample to be tested. In this case, the first incident light passes through the first window 1111 and enters the water sample to be tested, where it is refracted, and then passes through the second window 1112 and leaves the water sample to be tested, where it is refracted again and reaches the photodetector module 13. When the first window 1111 and the second window 1112 are arranged in parallel in an inclined manner, as shown in FIG. Figure 3 As shown, the first window 1111 can be tilted above the water sample to be tested, and the second window 1112 can be tilted below the water sample to be tested, and the two windows are in two substantially parallel planes. In this case, reflective materials or reflective mirrors can also be set on the first window 1111 and the second window 1112, and there is no limitation here, so that the first incident light can be reflected in the water sample to be tested after passing through the first window 1111, and then refracted after being emitted from the second window 1112 and reaches the photoelectric detector module 13.

[0056] In an optional manner, the first light source module 12 includes a laser generating module, the first incident light includes laser, and the center of the laser spot is marked with a center mark so as to accurately calculate the spot displacement.

[0057] The laser generating module may include a laser generator, which may emit a first incident light, i.e., a laser. In order to make the laser pass through the water sample to be tested and refracted to reach the photodetector module 13 for clearer imaging and to ensure that the data accuracy of the light spot displacement received by the photodetector module 13 is higher, a laser with a smaller light spot size and a center mark at the center of the light spot may be selected, and no restrictions are set here. For example, a laser with a light spot size of 6 mm in diameter may be selected, or a laser with a cross-shaped center mark at the center of the light spot may be selected. In this case, the line width of the cross may be limited to 6 mm, and the center mark may also be a cross-shaped, a cross-shaped, an X-shaped, etc., and no restrictions are set here. The first light source module 12 may also include an incident angle adjustment component, so that when the first incident light cannot be refracted after entering the water sample to be tested or the refractive index accuracy of the water sample to be tested is not high, the incident angle adjustment component may adjust the laser generating module to achieve the effect that the first incident light can be refracted after entering the water sample to be tested or the refractive index accuracy of the water sample to be tested is improved.

[0058] In an optional manner, it also includes: a second light source module 16, which is arranged inside the shell 11; the window 11 also includes a third window 1113; the second light source module 16 is used to provide a second incident light to the third window 1113; the photodetector module 13 is also used to receive the second incident light incident through the third window 1113.

[0059] The second light source module 16 can also be a laser, LED light or other light source, and there is no limitation here. Preferably, the second light source module 16 is an LED light source, and its incident light is parallel light. The LED light source can be a monochromatic light source or a wide-spectrum light source. The second light source module 16 can be arranged on either side of the first light source module 12. Figure 1 As shown, when the first light source module 12 is arranged below the water sample to be tested, the second light source module 16 can be arranged above the water sample to be tested; Figure 2 As shown, when the first light source module 12 is arranged at the top, the second light source module 16 can also be arranged at the top. The third window 1113 is the window through which the second incident light emitted by the second light source module 16 enters the water sample to be tested. Its purpose is to isolate the water sample to be tested from contact with other components such as the second light source module 16, while allowing the second incident light to pass through it to enter the water sample to be tested or to be emitted from the water sample to be tested. The second incident light emitted by the second light source module 16 passes vertically through the third window 1113. The second incident light passing through the third window 1113 will pass through the water sample to be tested and through the second window 1112 and then vertically reach the photodetector module 13, and the photodetector module 13 will convert the optical signal into an electrical signal, and finally form the spectral information of the water quality to be tested.

[0060] In a possible implementation, the second light source module 16 is further used to provide a third incident light to the photodetector module 13 , and the third incident light and the second incident light are two beams of incident light that are parallel to each other.

[0061] The third incident light and the second incident light provided by the second light source module 16 to the photodetector module 13 are two parallel incident light beams, and the two incident light beams are of the same type, that is, they can both be visible light, ultraviolet light, etc., and there is no limitation here.

[0062] In a possible implementation, the third incident light is reference light, the second incident light is detection light, the reference light does not pass through the water sample to be tested, and the detection light can pass through the water sample to be tested.

[0063] The reference light is a light beam set in contrast to the detection light, and the reference light beam path can be set inside the housing so that the reference light does not pass through the water sample to be tested. The detection light is a light beam used to detect the water sample to be tested, and the way the detection light passes through the water sample to be tested can be referred to the previous description and will not be repeated here.

[0064] In a possible implementation, the photodetector module 13 includes a first detection area and a second detection area, the first detection area is used to receive the first incident light, and the second detection area is used to receive the second incident light and the third incident light.

[0065] The photodetector module 13 can be used to receive the spot displacement between the spot position and the preset position when the first incident light reaches the photodetector module 13 after being refracted by the water sample to be tested, and the spot displacement information is in the first detection area; it can also receive the spectral information formed by the second incident light (i.e., the detection light) passing through the water sample to be tested and incident on it, and can also receive the spectral information formed by the third incident light (i.e., the reference light) not passing through the water sample to be tested and incident on it, and the spectral information of the reference light and the detection light is in the second detection area. A certain distance is set between the first detection area and the second detection area, or a structure is set to avoid mutual interference between the first incident light and the second or third incident light. The size of the distance or the size and shape of the structure are suitable for the first incident light and the second incident light, the third incident light will not generate crosstalk and then interfere with each other when monitoring water quality.

[0066] A quantum dot layer is arranged on the second detection area. The quantum dots have a relatively wide spectral response range, which can cover the range of ultraviolet (wavelength 200nm ~ 380nm), visible light (380nm ~ 780nm) to near infrared (wavelength above 780).

[0067] A specific implementation of a water quality monitoring device of the present application includes a water quality monitoring sensor 10 of the present application.

[0068] The water quality monitoring device including the water quality monitoring sensor 10 can monitor the water area requiring water quality monitoring in a long-term, online and real-time manner.

[0069] Furthermore, the water quality monitoring device is also provided with an automatic cleaning component.

[0070] The automatic cleaning component can regularly automatically clean the sensor devices such as the water quality monitoring sensor 10 in the water quality monitoring equipment, especially the window area thereof, so that the water quality monitoring equipment can work stably for a long time.

[0071] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various aspects of the present invention, in the above description of the exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims that follow the specific embodiments are hereby expressly incorporated into the specific embodiments, wherein each claim itself serves as a separate embodiment of the present invention.

[0072] It should be noted that the above embodiments illustrate the utility model rather than limit the utility model, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation on the claims. The word "comprising" does not exclude the existence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the existence of multiple such elements. The utility model can be implemented by means of hardware including several different elements and by means of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names. The steps in the above embodiments should not be understood as limitations on the order of execution unless otherwise specified.

Claims

1. A water quality monitoring sensor, characterized in that: The water quality monitoring sensor comprises: A housing, comprising a window through which light can pass, wherein the interior of the housing forms a closed area, and a detection area is formed outside the housing, through which a water sample to be tested can flow; A first light source module, which is disposed inside the housing and is used to provide a first incident light, wherein the first incident light enters the water sample to be tested through the window; a photoelectric detector module, which is arranged inside the housing and is used to receive the spot position of the first incident light when it reaches the photoelectric detector module after being refracted by the water sample to be tested, so as to determine the spot displacement of the first incident light according to the spot position and a preset position, wherein the preset position refers to the spot position of the first incident light when it reaches the photoelectric detector module after being refracted by the standard water sample at a preset incident angle; The water quality status monitoring module is electrically connected to the photoelectric detector module.

2. The water quality monitoring sensor according to claim 1, characterized in that: The window includes a first window and a second window, and the second window receives the first incident light that passes through the first window and the water sample to be tested, so that the first incident light reaches the photoelectric detector module through the second window.

3. The water quality monitoring sensor according to claim 2, characterized in that: Also includes: The reflector is used to receive the first incident light that passes through the first window and the water sample to be tested, and reflect the first incident light to the second window, so that the first incident light reaches the photoelectric detector module through the second window.

4. The water quality monitoring sensor according to claim 2, characterized in that: Also includes: An optical component is located inside the housing and is used to adjust the incident direction of the first incident light so that the first incident light enters the water sample to be tested through the first window.

5. The water quality monitoring sensor according to any one of claims 2 to 4, characterized in that: The first window and the second window are arranged on the same side of the water sample to be tested or on two opposite sides of the water sample to be tested.

6. The water quality monitoring sensor according to any one of claims 1 to 4, characterized in that: The first light source module includes a laser generating module, the first incident light includes laser, and the center of the laser spot has a center mark.

7. The water quality monitoring sensor according to claim 2, characterized in that: Also includes: A second light source module is disposed inside the housing; The window further includes a third window; the second light source module is used to provide a second incident light to the third window; The photodetector module is further configured to receive the second incident light incident through the third window.

8. The water quality monitoring sensor according to claim 7, characterized in that: The second light source module is further used to provide a third incident light to the photodetector module, and the third incident light and the second incident light are parallel lights.

9. The water quality monitoring sensor according to claim 8, characterized in that: The third incident light is reference light, the second incident light is detection light, the reference light does not pass through the water sample to be tested, and the detection light can pass through the water sample to be tested.

10. The water quality monitoring sensor according to claim 8 or 9, characterized in that: The photodetector module includes a first detection area and a second detection area, the first detection area is used to receive the first incident light, and the second detection area is used to receive the second incident light and the third incident light.

11. A water quality monitoring device, characterized in that: It comprises a water quality monitoring sensor as described in any one of claims 1 to 10.

12. The water quality monitoring device according to claim 11, characterized in that: The water quality monitoring device is also provided with an automatic cleaning component.

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