Monitoring sensor and water quality monitoring equipment

Abstract

The utility model discloses a monitoring sensor and water quality monitoring equipment, and relates to the technical field of water quality monitoring, the monitoring sensor comprises a first window seat and a second window seat, and a detection area is arranged between the first window seat and the second window seat; a first light source module, a first light path channel, a second light path channel and a receiving module are arranged in the first window seat, and a first reflecting part is arranged on one surface, perpendicular to the detection area, of the first window seat; one surface of the second window seat close to the detection area is provided with a second reflector; light emitted by the first light source module is reflected by the first reflecting piece, then penetrates through one area of the window piece, then passes through the detection area, reaches the second reflecting piece, is reflected by the second reflecting piece, penetrates through the other area of the window piece and reaches the receiving module. The monitoring sensor provided by the utility model is compact in overall structure and easy to integrate, and can meet the requirements of miniaturization and convenience.

Description

Technical Field

[0001] The present application relates to the technical field of water quality monitoring, and in particular to monitoring sensors and water quality monitoring equipment. Background Art

[0002] In the field of water environment monitoring, the use of water quality monitoring devices can detect parameters in the water environment, such as the types of pollutants, the concentrations of various pollutants and their changing trends, so as to scientifically evaluate the water quality in the water environment.

[0003] However, water quality monitoring devices in the prior art often require setting up a pre-test processing environment, sampling the water level to be tested, and then using the testing equipment to test the sample to obtain the required data. The testing process is complicated and it is not easy to achieve long-term in-situ water quality testing with the testing equipment directly immersed in the water body.

[0004] In addition, water quality monitoring devices in the prior art often have problems such as long optical path, large devices, and complex structures. Long optical path will cause greater attenuation of the optical signal during transmission, thereby reducing the strength of the detection signal. In addition, in order to achieve the required optical path length, the device size will also increase, thereby increasing the difficulty of using and maintaining the equipment. The complex structural design will also increase the manufacturing cost and maintenance cost of the equipment, so there is a lack of miniaturized and highly integrated water quality monitoring devices. Utility Model Content

[0005] In order to solve or improve at least one of the problems mentioned in the background technology, the present application provides the following technical solutions:

[0006] In a first aspect, a monitoring sensor includes a first window seat and a second window seat, wherein a detection area is provided between the first window seat and the second window seat;

[0007] A first light source module, a first optical path channel, a second optical path channel and a receiving module are arranged inside the first window seat, a window sheet is arranged on a side of the first window seat close to the detection area, the receiving module is arranged below the window sheet, and a first reflector is arranged on a side of the first window seat perpendicular to the detection area; wherein, a light source emitting end of the first light source module is arranged at the incident end of the first optical path channel, an exit end of the first optical path channel leads to the first reflector, an incident end of the second optical path channel leads to the first reflector, and an exit end of the second optical path channel leads to the window sheet;

[0008] A second reflective member is fixedly disposed on a side of the second window seat close to the detection area;

[0009] The light emitted by the first light source module is reflected by the first reflector, passes through an area of ​​the window sheet, passes through the detection area, reaches the second reflector, and then is reflected by the second reflector, passes through another area of ​​the window sheet, and reaches the receiving module.

[0010] Preferably, the first light source module is a laser generator.

[0011] Preferably, the window piece includes a first window piece and a second window piece, the first window piece and the second window piece are both arranged on a side of the first window seat close to the detection area, and the receiving module is arranged below the second window piece.

[0012] Preferably, the first optical path channel, the second optical path channel, the first reflector and the window sheet are an integrally formed structure.

[0013] Preferably, it further includes a second light source module, a third window piece is fixedly provided on a side of the second window seat close to the detection area, a connecting portion is provided on a side of the second window seat away from the detection area, and the second window seat is movably connected to the second light source module via the connecting portion.

[0014] Preferably, the second light source module includes a first incident light path seat, a first light source and a first lens, the first light source is fixedly arranged at the incident end of the first incident light path seat, the exit end of the first incident light path seat is movably connected to the second window seat through the connecting part, and the first lens is fixedly arranged inside the first incident light path seat.

[0015] Preferably, the second light source module also includes a second lens, a beam splitter and a second detector, the second detector is fixedly arranged on the side of the first incident light path seat, the beam splitter is tiltedly arranged inside the first incident light path seat, the second detector is located between the first lens and the beam splitter, and the receiving side of the second detector faces the second lens.

[0016] Preferably, the second light source module includes a second incident light path seat, a second light source and a third lens, and the second light source and the third lens are fixedly arranged in sequence from the incident end to the exit end inside the second incident light path seat, and the exit end of the second incident light path seat is movably connected to the second window seat through the connecting part.

[0017] Preferably, it also includes an optical path switching module, which includes a switching seat, a switching piece and an execution module. A switching seat detection optical path channel and a switching seat reference optical path channel are provided inside the switching seat. The switching piece is movably arranged inside the switching seat and is located at the exit ends of the switching seat detection optical path channel and the switching seat reference optical path channel. The execution module is fixedly arranged on the switching seat and drives the switching piece to switch between the switching seat detection optical path channel and the switching seat reference optical path channel; wherein the incident end of the switching seat is fixedly connected to the exit end of the second light source module, and the exit end of the switching seat is movably connected to the second window seat through the connecting part.

[0018] Preferably, a first window seat detection light path channel and a first window seat reference light path channel are arranged inside the first window seat, and a second window seat detection light path channel and a second window seat reference light path channel are arranged inside the second window seat, the incident end of the second window seat detection light path channel corresponds to the switching seat detection light path channel, the exit end of the second window seat detection light path channel corresponds to the first window seat detection light path channel, the incident end of the second window seat reference light path channel corresponds to the switching seat reference light path channel, and the exit end of the second window seat reference light path channel corresponds to the first window seat reference light path channel.

[0019] In a second aspect, a water quality monitoring device comprises the monitoring sensor.

[0020] Compared with the prior art, this application has at least the following beneficial effects:

[0021] 1. The present application provides a monitoring sensor, comprising a first window seat and a second window seat, wherein a detection area is provided between the first window seat and the second window seat; a first light source module, a first optical path channel, a second optical path channel and a receiving module are provided inside the first window seat, a window sheet is provided on a side of the first window seat close to the detection area, the receiving module is provided below the window sheet, and a first reflector is provided on a side of the first window seat perpendicular to the detection area; wherein a light source emitting end of the first light source module is provided at an incident end of the first optical path channel, an exit end of the first optical path channel leads to the first reflector, an incident end of the second optical path channel leads to the first reflector, and an exit end of the second optical path channel leads to the Toward the window piece; a second reflector is arranged on one side of the second window seat close to the detection area. The light emitted by the first light source module is reflected by the first reflector, passes through an area of ​​the window piece, passes through the detection area to reach the second reflector, and then is reflected by the second reflector, passes through another area of ​​the window piece to reach the receiving module, so that the overall structure is compact and easy to integrate, which can meet the needs of miniaturization and convenience of monitoring equipment in application scenarios such as sewage pipe networks, rainwater pipe networks, and groundwater pipe networks. A detection area is arranged between the first window seat and the second window seat to facilitate the inflow of water samples to be tested, so as to achieve in-situ and real-time monitoring of optical information in the water environment, thereby obtaining water quality measurement results.

[0022] 2. In the present application, the first light source module adopts a laser generator. The laser light source provided by the laser generator can reduce the light loss problem in the optical path.

[0023] 3. The first optical path channel, the second optical path channel, the first reflector and the first window sheet are an integrated structure, which can ensure the consistency of the optical path and the accuracy of the incident angle.

[0024] 4. Integrate the relevant components of the two optical paths together, and obtain water quality information by in-situ real-time monitoring of the optical information of the water environment. The overall structure is compact and easy to integrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0026] Figure 1 A schematic diagram of the structure of a monitoring sensor provided in Example 1 of the present application;

[0027] Figure 2A cross-sectional view of a monitoring sensor provided in Example 1 of the present application;

[0028] Figure 3 A cross-sectional view of a second light source module provided in Embodiment 2 of the present application;

[0029] Figure 4 A schematic diagram of the structure of a monitoring sensor including a second light source module provided in the second embodiment of the present application;

[0030] Figure 5 A cross-sectional view of a monitoring sensor including a second light source module provided in Embodiment 2 of the present application;

[0031] Figure 6 A cross-sectional view of a second incident light path seat of a second light source module provided in Embodiment 3 of the present application;

[0032] Figure 7 This is a cross-sectional view of the light path switching module of the second light source module provided in Example 3 of the present application.

[0033] Description of reference numerals:

[0034] 1. First window seat; 101. Laser generator; 102. First optical path channel; 103. Second optical path channel; 104. Receiving module; 105. First window plate; 106. Second window plate; 107. First reflector; 108. Base; 109. Detector pressure plate; 2. Second window seat; 201. Second reflector; 202. Third window plate; 203. Connecting part; 3. Detection area; 4. Second light source module; 401. First incident optical path seat; 402. Light board; 403. Main control board; 404. Main control board bracket ; 405, the first lens; 406, the beam splitter; 407, the second lens; 408, the second detector; 409, the spacer; 410, the first light-shielding dust cover; 501, the second incident light path seat; 502, the axial light source; 503, the beam splitter; 504, the third lens; 505, the radial light source; 506, the second light-shielding dust cover; 507, the light path switching module; 5071, the switching seat; 5072, the execution module; 5073, the switching piece; 5074, the switching seat detection light path channel; 5075, the switching seat reference light path channel. DETAILED DESCRIPTION

[0035] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0036] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0037] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this application are usually used to indicate the general relative position relationship for the purpose of intuitive understanding by referring to the drawings, and are not absolute limitations on the position relationship in the actual product.

[0038] Embodiment 1

[0039] See also Figure 1 and Figure 2 , this embodiment provides a monitoring sensor, including a first window seat 1 and a second window seat 2. The first window seat 1 and the second window seat 2 can be a split structure or an integrally formed structure. The first window seat 1 and the second window seat 2 adopt an integrated design, which has a more compact structure and higher stability. A detection area 3 is formed between the first window seat 1 and the second window seat 2. The detection area 3 is concave so that the water sample to be tested can flow through the detection area 3. 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. The any water area can be a river, a lake, an underground drainage network, groundwater, etc., and there is no limitation here. Monitoring refers to monitoring organic matter in water areas, such as organic matter composed of alcohols, aldehydes, ketones, phenols, acids, etc.

[0040] Specifically, the first window seat 1 includes a base 108, and the base 108 and the first window seat are an integrally formed structure. The first window seat 1 is provided with a first light source module, a first light path channel 102, a second light path channel 103 and a receiving module 104, wherein the first light source module adopts a laser generator 101; a window sheet is provided on a side of the first window seat 1 close to the detection area 3, and the window sheet includes a first window sheet 105 and a second window sheet 106, and the receiving module 104 is provided below the second window sheet 106, and the first window seat 1 is connected to the detection area 3 is provided with a first reflector 107; wherein, the fixed end of the laser generator 101 is provided on the base 108 of the first window seat 1, the laser emitting end of the laser generator 101 is provided at the incident end of the first optical path channel 102, the emission end of the first optical path channel 102 leads to the first reflector 107, the incident end of the second optical path channel 103 also leads to the first reflector 107, and the emission end of the second optical path channel 103 leads to the first window sheet 105; the second reflector 201 is provided on the side of the second window seat 2 close to the detection area 3. It should be noted that the setting in this embodiment can be a detachable connection or a non-detachable connection, for example, any one of gluing, screws, and pressure rings is used, preferably gluing, and the glue used has acid, alkali, salt and corrosion resistance. The first reflector and the second reflector in this embodiment are both components that can reflect light, for example, they can be a reflector, or an optical element coated with a reflective material, or a component in which a reflector is provided on a substrate, and no limitation is made to this.

[0041] In this embodiment, the first optical path channel 102, the second optical path channel 103, the first reflector 107 and the first window sheet 105 are an integrated structure, which can ensure the consistency of the optical path and the accuracy of the incident angle.

[0042] In this embodiment, the first window seat 1 and the base 108 can be a split structure, and the base 108 is threadedly connected to the first window seat 1 for easy disassembly. The base 108 can be an inclined base or a flat base. If it is a flat base, it is similar to a cover and can be covered on the first window seat 1. A sealing gasket can also be provided between the base 108 and the first window seat 1, and the sealing gasket plays a sealing role. The purpose of providing the base 108 is, on the one hand, to facilitate the processing of the optical path of the laser generator 101 and ensure the incident accuracy; on the other hand, it is convenient for disassembly and maintenance, so as to meet the assembly requirements.

[0043] In this embodiment, the laser generator 101 is used to emit laser light. The laser generator 101 is tiltedly mounted on the base 108 of the first window seat 1 by gluing, which can make the overall structure more compact.

[0044] In this embodiment, the first window sheet 105, the second window sheet 106 and the first reflector 107 are all fixed on the first window seat 1 by gluing, so that the space of the monitoring sensor can be more compact. A foolproof structure can be set at the place where the glue is glued, and the foolproof structure can align the first window sheet 105, the second window sheet 106, the first reflector 107 and the third window sheet 202 at the fixed positions on the first window seat 1 and the second window seat 2.

[0045] In this embodiment, the receiving module 104 includes a first detector and a detector pressing plate 109. The first detector is a quantum dot detector, which can be CCD or CMOS, etc. The first detector is arranged below the window sheet through the detector pressing plate 109. A groove is arranged in the first window seat 1, and the first detector is arranged in the groove. The detector pressing plate 109 is threadedly connected to the first window seat 1. A heat-conducting material can also be arranged between the detector pressing plate 109 and the receiving module 104 to facilitate heat dissipation of the receiving module 104. The purpose of setting the receiving module 104 is to receive the spot information of the laser.

[0046] In this embodiment, the first window piece 105, the second window piece 106 and the third window piece 202 are both light-transmissive and waterproof and sealed.

[0047] The principle of a monitoring sensor provided in this embodiment is specifically as follows: the laser emitted by the laser generator 101 passes through the first optical path channel 102 to the first reflector 107, and after being reflected by the first reflector 107, passes through the second optical path channel 103 and passes through the first window piece 105 to enter the water sample to be tested in the detection area 3, and then reaches the second reflector 201. After being reflected by the second reflector 201, it will pass through the second window piece 106 and reach the receiving module 104. The receiving module 104 can receive the spot information of the laser and obtain the water quality information in the water sample to be tested according to the spot information.

[0048] The monitoring sensor provided in this embodiment has a compact overall structure and is easy to integrate, which can meet the needs of application scenarios such as sewage pipe networks, rainwater pipe networks, and groundwater pipe networks for miniaturization and convenience of monitoring equipment.

[0049] Embodiment 2

[0050] See also Figure 3 , Figure 4 and Figure 5, this embodiment provides a monitoring sensor including a second light source module 4 on the basis of the first embodiment. In order to integrate the second light source module 4 into the monitoring sensor provided in the first embodiment, this embodiment needs to set a connecting portion 203 on the side of the second window seat 2 away from the detection area 3, and connect the second light source module 4 to the second window seat 2 through the connecting portion 203, and the connection method is a movable connection, such as a threaded connection, etc.; in order to make the incident light generated by the second light source module 4 incident on the receiving module 104, this embodiment needs to set a third window sheet 202 on the side of the second window seat 2 close to the detection area 3, and the third window sheet 202 can also be fixed on the second window seat 2 by gluing.

[0051] Specifically, the second light source module 4 includes a first incident light path seat 401, a first light source and a first lens 405. The first light source is fixedly arranged at the incident end of the first incident light path seat 401. The output end of the first incident light path seat 401 is movably connected to the second window seat 2 through a connecting part 203. The first lens 405 is fixedly arranged inside the first incident light path seat 401.

[0052] The first light source may be a lamp board 402, which may be an LED lamp board. When the first light source is the lamp board 402, the main control board 403 may be used to provide power to the lamp board 402 and control its operation, thereby controlling the operation of the monitoring sensor. The main control board 403 is fixedly arranged on one side of the first incident light path seat 401 through the main control board bracket 404, the lamp board 402 is fixedly arranged at the incident end of the first incident light path seat 401, and the exit end of the first incident light path seat 401 is movably connected to the second window seat 2 through the connecting portion 203.

[0053] In this embodiment, the first incident light path seat 401 provides an installation position for the lamp board 402, the main control board 403, the first lens 405 and the beam splitter 406 to ensure the accuracy and consistency of the light path after installation. The installation position can be an installation groove, an installation clip, etc.

[0054] In this embodiment, the first lens 405 can be set on the first incident light path seat 401 by glue, a spacer ring, a threaded pressure ring, etc., and is used to converge the incident light emitted by the LED light board and allow the incident light to pass through.

[0055] In this embodiment, the second light source module 4 further includes a second lens 407, a beam splitter 406 and a second detector 408. The second detector 408 can be a CCD or a CMOS, and there is no limitation here. The beam splitter 406 is tilted inside the first incident light path seat 401, and the beam splitter 406 plays the role of a semi-reflective semi-mirror, which can both transmit and reflect the light beam. The second detector 408 is fixedly arranged on a side of the first incident light path seat 401 provided with a main control board 403, and the second detector 408 is located between the first lens 405 and the beam splitter 406. The second lens 407 is arranged below the second detector 408. The second detector 408 can monitor the light intensity of the incident light path of the second light source module 4 by receiving the light reflected by the beam splitter 406. A spacer 409 is provided on the second detector 408, and the spacer 409 is used to fix the second detector 408 and play an insulating role. The second detector 408 includes a plurality of semiconductor nanocrystals having the ability to absorb light of a predetermined wavelength arranged on the surface of the detector, and the semiconductor nanocrystals are quantum dots.

[0056] The second light source module 4 further includes a first light shielding dust cover 410, which is fixedly disposed on the first incident light path seat 401. The first light shielding dust cover 410 can be connected to the first incident light path seat 401 by screws, glue, etc., which can ensure the cleanliness of the light path and prevent light leakage.

[0057] The first detector in the receiving module 104 includes a first receiving area and a second receiving area. The first receiving area is used to receive the incident light emitted by the first light source module. The second receiving area is provided with a quantum dot layer. The quantum dots have a wide spectral response range, which can cover the range of ultraviolet (wavelength 42nm~380nm), visible light (380nm~780nm) to near infrared (wavelength above 780). The second receiving area is used to receive the incident light emitted by the second light source module 4.

[0058] A certain distance is set between the first receiving area and the second receiving area, or a structure is set to avoid mutual interference between the incident light emitted by the first light source module and the second light source module 4. The size of the distance or the size and shape of the structure are suitable so that the incident light emitted by the first light source module and the second light source module 4 will not generate crosstalk and thus cause mutual interference when monitoring water quality.

[0059] The first whole machine housing (not shown in the figure) and the second whole machine housing (not shown in the figure) can be respectively sealed and connected to the second window seat 2 to form a reliable waterproof sealed housing to ensure that the monitoring sensor works safely and stably. The principle of a monitoring sensor provided in this embodiment is specifically as follows: the second detector 408 provides incident light and converges at the first lens 405 and then passes through the first lens 405 to the beam splitter 406. At this time, the incident light can pass through the beam splitter 406 and then pass through the third window sheet 202 to reach the detection area 3, and after passing through the detection area 3, pass through the second window sheet 106 to reach the second receiving area of ​​the first detector of the receiving module 104. At the same time, the incident light can also be reflected to the second lens 407 and reach the second detector 408 (as a comparison form of the incident light that can pass through the detection area 3), thereby realizing the spectral method for measuring water quality. When the main control board 403 controls the second light source to stop running and starts the first light source module to run, another optical path can be realized, and water quality information can be obtained by monitoring the optical information of the water environment. The specific working principle can be seen in the first embodiment, which will not be repeated here.

[0060] The monitoring sensor provided in this embodiment integrates the relevant components of the two optical paths, obtains water quality information by in-situ real-time monitoring of the optical information of the water environment, and the overall transmission structure is compact and easy to integrate, which can meet the needs of sewage pipe networks, rainwater pipe networks, groundwater pipe networks and other application scenarios for miniaturization and convenience of monitoring equipment.

[0061] Embodiment 3

[0062] See also Figure 6 and Figure 7 , this embodiment provides a monitoring sensor including a second light source module 4 on the basis of the first embodiment. In order to integrate the second light source module 4 on the monitoring sensor provided in the first embodiment, this embodiment needs to set a connecting portion 203 on the side of the second window seat 2 away from the detection area 3, and connect the second light source module 4 to the second window seat 2 through the connecting portion 203, and the connection method is a movable connection, such as a threaded connection, etc.; in order to make the incident light generated by the second light source module 4 incident on the receiving module 104, this embodiment needs to fix a third window sheet 202 on the side of the second window seat 2 close to the detection area 3, and the third window sheet 202 is also fixed to the second window seat 2 by gluing.

[0063] In this embodiment, the second light source module 4 includes a second incident light path seat 501, a second light source and a third lens 504; the second incident light path seat 501 is fixedly provided with a second light source and a third lens 504 in sequence from the incident end to the exit end, and the exit end of the second incident light path seat 501 is movably connected to the second window seat 2 through a connecting part 203.

[0064] The second light source includes an axial light source 502 and a radial light source 505 . The second light source module 4 also includes a beam splitter 503 . The light beams provided by the radial light source 505 and the axial light source 502 are shaped by the beam splitter 503 and the third lens 504 to form the incident light of the second light source module 4 .

[0065] In this embodiment, the light beam emission direction of the radial light source 505 can be along the radial direction of the second incident light path seat 501, and the light beam emission direction of the axial light source 502 can be along the axial direction of the second incident light path seat 501, and the emission directions of the two light beams are perpendicular. The wavelengths of the radial light source 505 and the axial light source 502 can be set to be different, so as to achieve multi-wavelength optical detection. Alternatively, the radial light source 505 can be omitted, and only the axial light source 502 provides incident light for the second light source module 4. It can be understood that when the radial light source 505 is omitted, the spectroscope 503 is also omitted at the same time.

[0066] In this embodiment, it also includes an optical path switching module 507, which includes a switching seat 5071, a switching piece 5073 and an execution module 5072. A switching seat detection optical path channel 5074 and a switching seat reference optical path channel 5075 are provided inside the switching seat 5071. The switching piece 5073 is movably arranged inside the switching seat 5071 and is located at the exit ends of the switching seat detection optical path channel 5074 and the switching seat reference optical path channel 5075. The execution module 5072 is fixedly arranged on the switching seat 5071 and drives the switching piece 5073 to switch between the switching seat detection optical path channel 5074 and the switching seat reference optical path channel 5075; wherein, the incident end of the switching seat 5071 is fixedly connected to the exit end of the second incident optical path seat 501, and the exit end of the switching seat 5071 is movably connected to the second window seat 2 through the connecting part 203.

[0067] In this embodiment, the first window seat is provided with a first window seat detection optical path channel and a first window seat reference optical path channel, the second window seat is provided with a second window seat detection optical path channel and a second window seat reference optical path channel, the incident end of the second window seat detection optical path channel corresponds to the switch seat detection optical path channel, the exit end of the second window seat detection optical path channel corresponds to the first window seat detection optical path channel, the incident end of the second window seat reference optical path channel corresponds to the switch seat reference optical path channel, and the exit end of the second window seat reference optical path channel corresponds to the first window seat reference optical path channel. In this embodiment, the incident light entering the switch seat detection optical path channel 5074, the first window seat detection optical path channel, and the second window seat detection optical path channel is called detection light, and the incident light entering the switch seat reference optical path channel 5075, the first window seat reference optical path channel, and the second window seat reference optical path channel is called reference light. Among them, the reference light is a standard light beam set in contrast to the detection light, the reference light does not pass through the water sample to be tested, and the detection light passes through the water sample to be tested. The execution module 5072 can be fixed to the switch seat 5071 by screws or the like. The execution module 5072 can drive the switch piece 5073 to switch, thereby shielding the detection light or the reference light as needed.

[0068] In this embodiment, the second light source module 4 further includes a second light shielding dust cover 506 , and the second light shielding dust cover 506 is disposed on the periphery of the second incident light path seat 501 .

[0069] In this embodiment, the second light source module 4 provides incident light through the second incident light path seat 501. The second light source module 4 can adopt an integral structural design. The integral structural design can avoid the accumulated errors caused by the disassembly and assembly of each single structure and the shortcomings of the overall structure being not compact due to too many mechanical interfaces.

[0070] In this embodiment, the second incident light path seat 501 provides an installation position for optical devices such as the axial light source 502, the beam splitter 503, the third lens 504 and the radial light source 505 to ensure the accuracy and consistency of the light path after installation. The above-mentioned installation position can be an installation groove, an installation clip, etc.

[0071] In this embodiment, the beam splitter 503 and the third lens 504 can be arranged in the second incident light path seat 501 by glue, a spacer ring, a threaded pressure ring, etc. Preferably, they are fixed by glue, which can save light path space and avoid reducing the aperture.

[0072] The principle of a monitoring sensor provided in this embodiment is specifically as follows: the second light source module 4 provides incident light through the second incident light path seat 501, and the incident light enters the optical path switching module 507 and is divided into detection light and reference light. The detection light passes through the third window piece 202 and enters the water sample to be tested in the detection area 3, and is incident on the second receiving area of ​​the first detector of the receiving module 104 through the second window piece 106. The reference light does not pass through the detection area 3, but is also incident on the second receiving area of ​​the first detector of the receiving module 104, and the optical path switching module 507 can selectively block the detection light or the reference light. For example, the detection light can be blocked before measurement, and only the reference light is incident on the receiving module 104 to obtain reference data, which is used as a reference or correction for the staff's measurement.

[0073] The monitoring sensor provided in this embodiment integrates the relevant components of the two optical paths, obtains water quality information by in-situ real-time monitoring of the optical information of the water environment, and the overall transmission structure is compact and easy to integrate, which can meet the needs of sewage pipe networks, rainwater pipe networks, groundwater pipe networks and other application scenarios for miniaturization and convenience of monitoring equipment.

[0074] Embodiment 4

[0075] This embodiment also provides a water quality monitoring device, including a cleaning device and the monitoring sensor in Embodiment 1, Embodiment 2 or Embodiment 3, wherein the cleaning device is used to clean the above-mentioned monitoring sensor.

[0076] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A monitoring sensor, characterized in that: It comprises a first window seat and a second window seat, wherein a detection area is provided between the first window seat and the second window seat; A first light source module, a first optical path channel, a second optical path channel and a receiving module are arranged inside the first window seat, a window sheet is arranged on a side of the first window seat close to the detection area, the receiving module is arranged below the window sheet, and a first reflector is arranged on a side of the first window seat perpendicular to the detection area; wherein, a light source emitting end of the first light source module is arranged at the incident end of the first optical path channel, an exit end of the first optical path channel leads to the first reflector, an incident end of the second optical path channel leads to the first reflector, and an exit end of the second optical path channel leads to the window sheet; A second reflective member is disposed on a side of the second window seat close to the detection area; The light emitted by the first light source module is reflected by the first reflector, passes through an area of ​​the window sheet, passes through the detection area, reaches the second reflector, and then is reflected by the second reflector, passes through another area of ​​the window sheet, and reaches the receiving module.

2. The monitoring sensor according to claim 1, characterized in that: The first light source module is a laser generator.

3. The monitoring sensor according to claim 1, characterized in that: The window piece includes a first window piece and a second window piece. The first window piece and the second window piece are both arranged on a side of the first window seat close to the detection area. The receiving module is arranged below the second window piece.

4. The monitoring sensor according to claim 1, characterized in that: The first optical path channel, the second optical path channel, the first reflector and the window sheet are an integrally formed structure.

5. The monitoring sensor according to any one of claims 1 to 4, characterized in that: It also includes a second light source module, a third window piece is fixedly provided on a side of the second window seat close to the detection area, a connecting portion is provided on a side of the second window seat away from the detection area, and the second window seat is movably connected to the second light source module through the connecting portion.

6. The monitoring sensor according to claim 5, characterized in that: The second light source module includes a first incident light path seat, a first light source and a first lens. The first light source is fixedly arranged at the incident end of the first incident light path seat. The exit end of the first incident light path seat is movably connected to the second window seat through the connecting part. The first lens is fixedly arranged inside the first incident light path seat.

7. The monitoring sensor according to claim 6, characterized in that: The second light source module also includes a second lens, a beam splitter and a second detector. The second detector is fixedly arranged on the side of the first incident light path seat, the beam splitter is tiltedly arranged inside the first incident light path seat, the second detector is located between the first lens and the beam splitter, and the receiving side of the second detector faces the second lens.

8. The monitoring sensor according to claim 5, characterized in that: The second light source module includes a second incident light path seat, a second light source and a third lens. The second incident light path seat is fixedly provided with the second light source and the third lens in sequence from the incident end to the exit end. The exit end of the second incident light path seat is movably connected to the second window seat through the connecting part.

9. The monitoring sensor according to claim 8, characterized in that: It also includes an optical path switching module, which includes a switching seat, a switching piece and an execution module. A switching seat detection optical path channel and a switching seat reference optical path channel are provided inside the switching seat. The switching piece is movably arranged inside the switching seat and is located at the exit ends of the switching seat detection optical path channel and the switching seat reference optical path channel. The execution module is fixedly arranged on the switching seat and drives the switching piece to switch between the switching seat detection optical path channel and the switching seat reference optical path channel; wherein the incident end of the switching seat is fixedly connected to the exit end of the second light source module, and the exit end of the switching seat is movably connected to the second window seat through the connecting part.

10. The monitoring sensor according to claim 9, characterized in that: The first window seat is provided with a first window seat detection light path channel and a first window seat reference light path channel, the second window seat is provided with a second window seat detection light path channel and a second window seat reference light path channel, the incident end of the second window seat detection light path channel corresponds to the switching seat detection light path channel, the exit end of the second window seat detection light path channel corresponds to the first window seat detection light path channel, the incident end of the second window seat reference light path channel corresponds to the switching seat reference light path channel, and the exit end of the second window seat reference light path channel corresponds to the first window seat reference light path channel.

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

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