Total organic carbon substance monitoring device

Abstract

The total organic carbon substance monitoring device comprises a first optical module, a second optical module and a sample channel, the first optical module comprises a first support, a light source and a spectroscope, the light source and the spectroscope are arranged on the first support, and the spectroscope is arranged on the light emitting side of the light source; the spectroscope is used for splitting light of the light source into a transmission beam and a first reflection beam; the second optical module comprises a second support as well as a first photosensitive structure and a second photosensitive structure which are arranged on the second support, the second support is connected with the first support, the first photosensitive structure is arranged on the light emitting side of the transmitted light beam of the spectroscope, and the second photosensitive structure is arranged on the light emitting side of the first reflected light beam of the spectroscope; the sample channel is arranged on the second support, and at least one part of the sample channel is located in a light path of a transmission light beam of the spectroscope and located on the light incident side of the first photosensitive structure. By adopting the scheme of the invention, the assembly precision of each optical element can be improved, and the structure and light path design of the total organic carbon substance monitoring device can be simplified.

Description

Technical Field

[0001] The present application relates to the field of water quality sensing technology, and in particular to a total organic carbon monitoring device. Background Art

[0002] Ultraviolet spectroscopy technology has the advantages of fast detection response, no secondary pollution, and no need to add chemical reagents. It can be used in water quality monitoring scenarios, such as monitoring total organic carbon (TOC) in water. Its principle is to use the absorption spectrum of material molecules (such as total organic carbon) in the ultraviolet region, and to measure the absorption peaks produced by material molecules after absorbing ultraviolet light. The qualitative and quantitative analysis and monitoring of substances in water can be achieved through the analysis of characteristic absorption peaks.

[0003] In the related art, when ultraviolet spectroscopy is used to monitor total organic carbon substances, the luminous intensity of the light source will change with the influence of temperature and aging, so the light intensity received by the photoelectric sensor will change, affecting the accuracy of the measurement results. Generally, the introduction of a calibration optical path can eliminate the effects of temperature changes or aging of the light source. However, the introduction of a calibration optical path will also bring the following problems: the introduction of a calibration optical path will not only make the optical path more complicated, thus requiring higher installation accuracy for each lens, but also the number of optical lenses will inevitably increase. There is a conflict between the space occupied by the installation and fixation of the optical lenses and the demand for miniaturization design. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present application provides a total organic carbon matter monitoring device, which can improve the assembly accuracy of each optical element and simplify the structure and optical path design of the total organic carbon matter monitoring device. The technical solution adopted is as follows.

[0005] The total organic carbon matter monitoring device provided in the present application includes a first optical module, a second optical module and a sample channel. The first optical module includes a first support and a light source and a spectroscope arranged on the first support. The spectroscope is arranged at the light output side of the light source, and the spectroscope is used to separate the light of the light source into a transmitted light beam and a first reflected light beam; the second optical module includes a second support and a first photosensitive structure and a second photosensitive structure arranged on the second support, the second support is connected to the first support, the first photosensitive structure is arranged on the light output side of the transmitted light beam of the spectroscope, and the second photosensitive structure is arranged on the light output side of the first reflected light beam of the spectroscope; the sample channel is arranged on the second support, and at least a portion of the sample channel is located in the light path of the transmitted light beam of the spectroscope and on the light input side of the first photosensitive structure.

[0006] In certain embodiments of the present application, the first optical module also includes a reflector, which is disposed on the first support and is located on the light-emitting side of the first reflected light beam of the beam splitter, so as to reflect the first reflected light beam into a second reflected light beam and transmit it to the second photosensitive structure, and the second reflected light beam is arranged parallel to the transmitted light beam.

[0007] In certain embodiments of the present application, a first mounting portion and a second mounting portion are spaced apart on the first support, the first mounting portion is provided with a first light-transmitting hole, the spectroscope is disposed on the first mounting portion, the first light-transmitting hole is used for allowing the first reflected light beam to pass through, and the reflector is disposed on the second mounting portion.

[0008] In certain embodiments of the present application, the first mounting portion has a first mounting surface, the first light-transmitting hole penetrates the first mounting surface along the direction of the first reflected light beam, the beam splitter is fixed on the first mounting surface, the second mounting portion has a second mounting surface, the reflector is fixed on the second mounting surface, and the first mounting surface is parallel to the second mounting surface.

[0009] In some embodiments of the present application, the first optical module further includes a convex lens, which is disposed on the light incident side of the beam splitter to form the light from the light source into parallel light;

[0010] A first mounting groove is provided on the first support, and the first mounting groove is arranged on the side of the first mounting part facing the light source. The convex lens is arranged in the first mounting groove. The first mounting part is also provided with a second light-transmitting hole, one end of the second light-transmitting hole is connected to the first mounting groove, and the other end is connected to the first light-transmitting hole. The second light-transmitting hole is used for allowing the light of the convex lens to pass into the spectroscope.

[0011] In certain embodiments of the present application, the first optical module also includes a first clamping block, which is arranged in the first mounting groove and located on the light incident side of the convex lens. The first clamping block can transmit the light of the light source. The first clamping block is used to abut the convex lens against the bottom of the first mounting groove. The light source is arranged on the side of the first clamping block away from the convex lens.

[0012] In certain embodiments of the present application, the first support has a connecting surface for connecting with the second support, the first mounting portion and the second mounting portion are arranged on the connecting surface, and the connecting surface of at least one of the first support and the second support is provided with a receiving groove, and when the first support is connected to the second support, the receiving groove is closed to form a receiving cavity, so that the first mounting portion and the second mounting portion are both located in the receiving cavity.

[0013] In certain embodiments of the present application, the second support is provided with a transmission light channel for the transmission light beam of the spectroscope to pass through, the first photosensitive structure is arranged at the outlet end of the transmission light channel, and the second optical module also includes an aperture assembly, and the aperture assembly is detachably arranged at the inlet end of the transmission light channel.

[0014] In certain embodiments of the present application, the second optical module also includes two window pieces spaced apart in the transmitted light channel, the portion between the two window pieces of the transmitted light channel forms a sealing section, the aperture assembly and the first photosensitive structure are both arranged outside the sealing section, and the sample channel is connected to the sealing section.

[0015] In some embodiments of the present application, at least one of the inlet end and the outlet end of the transmission light channel is provided with a second mounting groove, the second mounting groove is connected to the transmission light channel, and the window piece is arranged in the second mounting groove;

[0016] The second optical module also includes a second clamping block, which is arranged in the second mounting groove and located on the side of the window piece away from the sealing section. The second clamping block can transmit light. The second clamping block is used to abut the window piece against the bottom of the second mounting groove. The second clamping block is threadedly connected to the second mounting groove.

[0017] In certain embodiments of the present application, the sample channel is arranged to intersect with the sealing section, and a sample inlet and a sample outlet are formed on the side wall of the sealing section, and the sample inlet and the sample outlet are staggered along the sample flow direction.

[0018] In certain embodiments of the present application, the second support is provided with a transmission light channel for the transmitted light beam of the spectroscope to pass through, and a calibration light channel for the reflected light of the spectroscope to pass through, the transmission light channel and the calibration light channel are arranged in parallel, the first photosensitive structure is arranged at the exit end of the transmission light channel, the second photosensitive structure is arranged at the exit end of the calibration light channel, and the first photosensitive structure and the second photosensitive structure are arranged coplanarly at one end of the second support.

[0019] The embodiments of the present application have at least the following beneficial effects: by simultaneously installing the light source and the spectroscope on the first support, the relative position accuracy of the light source and the spectroscope can be improved, which helps to eliminate the assembly tolerance of the light source and the spectroscope, thereby improving the installation accuracy of the first optical module and meeting the overall accuracy requirements of the monitoring device. By arranging both the first photosensitive structure and the second photosensitive structure on the second support, the assembly tolerance of the two photosensitive structures can also be reduced, further improving the accuracy of the optical path of the monitoring device. The first optical module and the second optical module are assembled by connecting the first support and the second support to each other, so that the monitoring device can still maintain a simple setting of the optical path after the calibration optical path is introduced, avoiding the problem of reduced installation accuracy due to the complexity of the optical path, thereby ensuring that the monitoring device has good optical performance and monitoring accuracy. The sample channel can be used to pass a water sample to monitor the total organic carbon matter in the water sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The aspects and advantages described and / or attached in the embodiments of the present application will become apparent and easy to understand in conjunction with the following drawings. It should be noted that the embodiments embodied in the following drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0021] Figure 1 A schematic diagram of the structure of a total organic carbon monitoring device provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 AA section view;

[0023] Figure 3 An optical path diagram of a total organic carbon monitoring device provided in an embodiment of the present application;

[0024] Figure 4 An exploded view of a first optical module of a total organic carbon monitoring device provided in an embodiment of the present application;

[0025] Figure 5 An exploded view of a second optical module of a total organic carbon monitoring device provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the assembly of a first optical module and a second optical module of a total organic carbon monitoring device provided in an embodiment of the present application;

[0027] Figure 7 for Figure 1 BB cross-section diagram.

[0028] Reference numerals: 100, total organic carbon-free matter monitoring device;

[0029] 10. first optical module; 11. first support; 111. first mounting portion; 1111. first light transmission hole; 1112. first mounting surface; 1113. second light transmission hole; 112. second mounting portion; 1121. second mounting surface; 113. first mounting groove; 1131. first sealing ring; 12. light source; 13. spectroscope; 14. reflector; 15. convex lens; 16. first pressing block;

[0030] 20, second optical module; 21, second support; 211, receiving groove; 2111, second sealing ring; 212, receiving cavity; 213, transmission light channel; 2131, sealing section; 2132, second mounting groove; 2133, third sealing ring; 214, calibration light channel; 22, first photosensitive structure; 23, second photosensitive structure; 24, aperture assembly; 241, aperture base; 242, aperture piece; 25, window piece; 26, second pressing block;

[0031] 30. Sample channel; 31. Sample inlet; 32. Sample outlet. DETAILED DESCRIPTION

[0032] Combine the following Figures 1 to 7 Embodiments of the present application are described in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0033] In the description of the present application, it should be understood that if the terms "center", "middle", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] See also Figure 1 and Figure 2The present application provides a total organic carbon monitoring device 100 (hereinafter referred to as the monitoring device 100), including a first optical module 10, a second optical module 20 and a sample channel 30. The first optical module 10 includes a first support 11, a light source 12 and a spectroscope 13 disposed on the first support 11. The spectroscope 13 is disposed at the light exit side of the light source 12, and the spectroscope 13 is used to split the light of the light source 12 into a transmission light beam L1 and a first reflection light beam L2. The second optical module 20 includes a second support 21 and a first photosensitive structure 22 and a second photosensitive structure 23 disposed on the second support 21. The second support 21 is connected to the first support 11. The first photosensitive structure 22 is disposed on the light exit side of the transmission light beam L1 of the spectroscope 13, and the second photosensitive structure 23 is disposed on the light exit side of the first reflection light beam L2 of the spectroscope 13. The sample channel 30 is arranged on the second support 21, and at least a part of the sample channel 30 is located in the optical path of the transmission light beam L1 of the spectroscope 13, and is located on the light incident side of the first photosensitive structure 22. Compared with the light source 12 and the spectroscope 13 being installed on different components, by installing both the light source 12 and the spectroscope 13 on the first support 11, that is, installing two or more optical elements on the same support (first support 11), it is helpful to eliminate the assembly tolerance of the light source 12 and the spectroscope 13, thereby improving the installation accuracy of the first optical module 10 and meeting the overall accuracy requirements of the monitoring device 100. Among them, the assembly tolerance refers to the accumulation of part processing errors and the tolerance of the relative position of the parts assembly if the light source 12 and the spectroscope 13 are installed on different supports. Therefore, the installation method of the present application can improve the relative position accuracy of the light source 12 and the spectroscope 13, thereby helping to ensure that the actual propagation path of the light is closer to the designed ideal path. Similarly, it is not difficult to understand that by setting the first photosensitive structure 22 and the second photosensitive structure 23 on the second support 21, the assembly tolerance of the two photosensitive structures can also be reduced, and the monitoring accuracy of the monitoring device 100 can be further improved. The first optical module 10 and the second optical module 20 are assembled by connecting the first support 11 and the second support 21. With this connection method, the monitoring device 100 can still maintain a simple setting of the optical path after the calibration optical path is introduced, avoiding the problem of reduced installation accuracy due to the complexity of the optical path, thereby ensuring that the monitoring device 100 has good optical performance and monitoring accuracy. The sample channel 30 can be used to pass a water sample to monitor the total organic carbon matter in the water sample.

[0036] Please combine Figure 2 and Figure 3The working principle of the monitoring device 100 is as follows: after the light source 12 is turned on, it emits ultraviolet light. After the light reaches the spectroscope 13, the spectroscope 13 can transmit a part of the light, that is, forming a transmitted light beam L1. At the same time, the spectroscope 13 can also reflect the rest of the light, that is, forming a first reflected light beam L2. It can be understood that the spectroscope 13 can emit the transmitted light and the reflected light in different directions, thereby dividing the light generated by the light source 12 into two directions. The transmitted light beam L1 passes through the sample channel 30 and irradiates the water sample. The organic carbon substances in the sample absorb a part of the light. After the transmitted light is partially absorbed by the sample, it reaches the first photosensitive structure 22. The first photosensitive structure 22 can convert the detected light signal into an electrical signal, and obtain relevant data information of the organic carbon substances in the sample by analyzing the absorption peak in the electrical signal. It can be seen that the transmitted light beam L1 is used to irradiate the sample to be tested, and its function is to detect the sample, so the propagation path of the transmitted light beam L1 forms a monitoring light path. At the same time, the first reflected light beam L2 is irradiated to the second photosensitive structure 23, and the second photosensitive structure 23 can also convert the detected light signal into an electrical signal. By analyzing and comparing the electrical signals of the first photosensitive structure 22 and the second photosensitive structure 23, the light intensity changes of the light source 12 and the first photosensitive structure 22 caused by aging, temperature, etc. can be calibrated. Therefore, the first reflected light beam L2 is used to calibrate the light source 12 and the first photosensitive structure 22, and the propagation path of the first reflected light beam L2 forms a calibration light path. By setting the monitoring light path and the calibration light path at the same time, the monitoring device 100 can improve the reliability and accuracy of the detection of the first photosensitive structure 22 through the calibration process, thereby improving the accuracy of sample detection.

[0037] Exemplarily, the calibration process may be performed by observing the calibration light path (eg, observing the light intensity data of the second photosensitive structure 23), thereby actively adjusting the current of the light source 12, etc., so that the light intensity of the light source 12 can be maintained at a consistent level at different time periods and under different usage conditions.

[0038] Exemplarily, the first photosensitive structure 22 and the second photosensitive structure 23 may be photoelectric sensors, photoelectric chips, PD receivers, etc., and the first photosensitive structure 22 and the second photosensitive structure 23 may be on the second support 21 by screw connection or the like. The light source 12 may be an ultraviolet chip, an ultraviolet light source PCB, etc., and the light source 12 may be fixed to one end of the first support 11 by screws or the like. In order to improve the sealing performance and the reliability of the monitoring device 100 in a dusty or humid environment, a sealing structure (such as a sealing gasket, etc.) may be provided between the light source 12 and the first support 11. Similarly, a sealing structure may also be provided between the first photosensitive structure 22, the second photosensitive structure 23 and the second support 21 to prevent dust from entering the interior of the second support 21.

[0039] In some embodiments, please combine Figure 2 and Figure 4 The first optical module 10 further includes a reflector 14, which is disposed on the first support 11 and is located at the light exit side of the first reflected light beam L2 of the beam splitter 13, so as to reflect the first reflected light beam L2 into a second reflected light beam L3 and transmit it to the second photosensitive structure 23, and the second reflected light beam L3 is arranged in parallel with the transmitted light beam L1. By arranging the reflector 14, the direction of the first reflected light beam L2 can be changed and the second reflected light beam L3 can be obtained. By setting the reflection angle of the reflector 14, the second reflected light beam L3 can be made parallel to the transmitted light beam L1, so that the calibration light path can be made parallel to the monitoring light path, thereby simplifying the structural setting of the monitoring device 100. For example, in the second support 21, the channels for passing through the monitoring light path and the calibration light path can be arranged in parallel, or the first photosensitive structure 22 and the second photosensitive structure 23 can also be arranged on the same plane, so as to avoid the complex design of the light path under the premise of realizing the calibration of the monitoring device 100, simplify the structure of the monitoring device 100 and the setting method of each optical lens, and improve the reliability of the monitoring device 100. By also arranging the reflector 14 on the first support 11, on the one hand, the assembly error between the reflector 14 and the light source 12 and the spectrometer 13 can be reduced, thereby improving the optical path accuracy of the monitoring device 100; on the other hand, by integrating the reflector 14, the light source 12 and the spectrometer 13 on the first support 11, the structure of the first optical module 10 can be made simpler and more compact, thereby solving the problem of complex structure of the monitoring device 100 due to the increase in the number of optical lenses after the introduction of the calibration optical path; and since there is no need to set up other structures to install the reflector 14, it helps to reduce the number of components of the monitoring device 100 and realize the miniaturized design of the monitoring device 100.

[0040] In some embodiments, the first support 11 is provided with a first mounting portion 111 and a second mounting portion 112 at intervals, the first mounting portion 111 is provided with a first light-transmitting hole 1111, the beam splitter 13 is provided on the first mounting portion 111, the first light-transmitting hole 1111 is used for the first reflected light beam L2 to pass through, and the reflector 14 is provided on the second mounting portion 112. By providing the first mounting portion 111 and the second mounting portion 112, the beam splitter 13 and the reflector 14 can be installed separately to avoid mutual interference between the two during operation. By providing the first light-transmitting hole 1111 to pass the first reflected light beam L2, the requirements of the beam splitter 13 to generate transmitted light and the first reflected light beam L2 can be met, so that the monitoring light path and the calibration light path can be provided at the same time, and the first mounting portion 111 can be avoided from blocking the calibration light path.

[0041] In some embodiments, the first mounting portion 111 has a first mounting surface 1112, the first light-transmitting hole 1111 passes through the first mounting surface 1112 along the direction of the first reflected light beam L2, the beam splitter 13 is fixed on the first mounting surface 1112, the second mounting portion 112 has a second mounting surface 1121, the reflector 14 is fixed on the second mounting surface 1121, and the first mounting surface 1112 is parallel to the second mounting surface 1121. Exemplarily, the beam splitter 13 can be connected to the first mounting surface 1112 by thread locking or gluing, and the reflector 14 can be connected to the second mounting surface 1121 by thread locking or gluing, which can simplify the installation of the beam splitter 13 and the reflector 14 on the first support 11 and improve the assembly efficiency. Compared with the installation by screws, the adhesive combination method can save the reserved position for the installation using only screws, thereby further reducing the size of the first support 11, which helps to achieve the miniaturization design of the monitoring device 100. Of course, the beam splitter 13 and the reflector 14 can also be fixed by a combination of thread locking and gluing, which can further improve the strength of the connection to obtain a better fixing effect. On the other hand, by adopting this setting, as long as the angle and accuracy between the first mounting surface 1112 and the second mounting surface 1121 are controlled, the assembly accuracy of the beam splitter 13 and the reflector 14 can be met, which can reduce the assembly difficulty in the first optical module 10 and avoid the beam splitter 13 and the reflector 14 from being subjected to precision calibration during the assembly process, thereby meeting the assembly accuracy requirements of the first optical module 10.

[0042] Exemplarily, the first mounting surface 1112 is arranged in parallel with the second mounting surface 1121, and the mounting surface is arranged at a 45° angle to the direction of the light incident on the beam splitter 13. At this time, the beam splitter 13 is arranged in parallel with the reflector 14, and the beam splitter 13 is arranged at a 45° angle to the incident light, so that the transmitted light beam L1 of the beam splitter 13 and the first reflected light beam L2 are perpendicular to each other, and the second reflected light beam L3 reflected by the first reflected light beam L2 after being incident on the reflector 14 at an angle of 45° can be parallel to the transmitted light beam L1. Of course, in other examples, the first mounting surface 1112 and the second mounting surface 1121 can also be set to other angles, and accordingly, the beam splitter 13 and the reflector 14 can also be installed at other angles, which are not limited here.

[0043] In some embodiments, the first optical module 10 further includes a convex lens 15, which is disposed on the light incident side of the beam splitter 13 so that the light from the light source 12 is formed into parallel light. Since the light emitted by the light source 12 is usually non-parallel light, in order to improve the collimation of the light, a convex lens 15 can be provided to parallelize the light. It can be understood that the light source 12 is disposed at the focus of the convex lens 15, so that parallel light can be obtained after passing through the convex lens 15, and the light from the light source 12 is incident on the beam splitter 13 in the form of parallel light after being collimated. The first support 11 is provided with a first mounting groove 113, which is provided on the side of the first mounting portion 111 facing the light source 12, and the convex lens 15 is provided in the first mounting groove 113. The first mounting portion 111 is also provided with a second light-transmitting hole 1113, one end of the second light-transmitting hole 1113 is connected to the first mounting groove 113, and the other end is connected to the first light-transmitting hole 1111, and the second light-transmitting hole 1113 is used to allow the light converged by the convex lens 15 to pass into the beam splitter 13. The convex lens 15 is installed by using the first mounting groove 113, and the second light-transmitting hole 1113 is provided between the first mounting groove 113 and the first mounting portion 111, so that the convex lens 15 can be fixed on the one hand, and the parallel light emitted from the convex lens 15 can be smoothly irradiated into the beam splitter 13 on the other hand.

[0044] In some embodiments, the first optical module 10 further includes a first clamping block 16, which is disposed in the first mounting groove 113 and located on the light incident side of the convex lens 15. The first clamping block 16 can transmit the light of the light source 12, and the first clamping block 16 is used to abut the convex lens 15 against the bottom of the first mounting groove 113 (i.e., the end of the first mounting groove 113 connected to the first light-transmitting hole 1111), and the light source 12 is disposed on the side of the first clamping block 16 away from the convex lens 15. Using the first clamping block 16 to abut the convex lens 15 in the first mounting groove 113 can, on the one hand, prevent the convex lens 15 from shaking or shifting, improve the stability of the installation of the convex lens 15 and ensure the accuracy of the optical path. On the other hand, by first placing the convex lens 15 and then clamping it with the first clamping block 16, the convex lens 15 can be fixed, which can meet the preset distance between the convex lens 15 and the light source 12 (the preset distance is usually determined by the focal length of the convex lens 15 itself), and can also simplify the installation method of the convex lens 15. Optionally, the first clamping block 16 can be a transparent, light-transmitting block that has no deflection effect on light, or it can be a structure with a light-transmitting structure in the middle and opaque structures around it. For example, a light-transmitting structure is set in the middle of an originally opaque material, or the surrounding area of ​​the originally overall light-transmitting material is coated with a light-shielding paint to create a light-transmitting effect in the middle. The present application does not impose any limitations on this.

[0045] As an optional embodiment, a first sealing ring 1131 can also be provided at the bottom of the first mounting groove 113. When the convex lens 15 abuts against the first mounting groove 113, it can abut against the sealing ring. On the one hand, it can not only realize the soft connection and fixation of the convex lens 15, but also reduce the displacement of the lens due to external temperature changes and external forces, and ensure the distance between the convex lens 15 and the light source 12. Since the first sealing ring 1131 is in a compressed state after installation, it can give the convex lens 15 a reaction force, so that the plane of the convex lens 15 is always tightly fitted with the first clamping block 16, thereby realizing the precise control of the distance between the convex lens 15 and the light source 12. On the other hand, the sealing of the first mounting groove 113 can also be realized. At the same time, the light source 12 is arranged toward the first mounting groove 113, and certain sealing measures (such as a sealing ring, sealant, etc.) can also be adopted between the light source 12 and one end of the opening of the first mounting groove 113. At the same time, since the spectrometer 13 and the first mounting surface 1112 are adhesively connected, it also helps to seal the first light-transmitting hole 1111, so that both ends of the first mounting groove 113 are sealed, which helps to prevent the light source 12, the convex lens 15 and the first clamping block 16 from being corroded by water vapor and contaminated by external dust, thereby improving the reliability and service life of these components.

[0046] As an optional embodiment, the convex lens 15 can adopt a plano-convex lens structure, that is, one side is convex and the other side is flat, and the convex side is arranged toward the beam splitter 13, and the first sealing ring 1131 helps to fill the gap between the outer periphery of the convex side of the convex lens 15 and the bottom of the first mounting groove 113, thereby improving the sealing effect of the first mounting groove 113. The flat side of the convex lens 15 is arranged toward the first clamping block 16, and the connection surface of the first clamping block 16 for abutting against the convex lens 15 is also arranged as a flat surface, which can improve the stability of the connection between the first clamping block 16 and the convex lens 15.

[0047] As an optional implementation, the first clamping block 16 and the first mounting groove 113 may be connected by threads, for example, an internal thread is provided at one end of the opening of the first mounting groove 113, and an external thread is provided on the first clamping block 16, and the two are screwed together to fix the first clamping block 16 in the first mounting groove 113. Compared with the screw fixing method, the method of directly screwing the first clamping block 16 and the first mounting groove 113 can save the reserved position for screw installation, making the structure of the first support 11 more compact, which is conducive to realizing the miniaturization design of the first optical module 10.

[0048] In some embodiments, see Figure 5 and Figure 6The first support 11 has a connection surface for connecting with the second support 21, the first mounting portion 111 and the second mounting portion 112 are arranged on the connection surface, and the connection surface of at least one of the first support 11 and the second support 21 is provided with a receiving groove 211, and when the first support 11 is connected to the second support 21, the receiving groove 211 is closed to form a receiving cavity 212, so that the first mounting portion 111 and the second mounting portion 112 are both located in the receiving cavity 212. By providing the receiving cavity 212, the first mounting portion 111, the second mounting portion 112 and the corresponding beam splitter 13 and reflector 14 can be accommodated in the receiving cavity 212, which can provide a closed space for the beam splitter 13 and the reflector 14 to avoid being contaminated by the outside world, thereby improving the reliability of the beam splitter 13 and the reflector 14. On the other hand, by providing the receiving groove 211, the receiving groove 211 is closed when the first support 11 is connected to the second support 21, which can save space on the first support 11 and the second support 21, making the structure of the first support 11 and the second support 21 more compact.

[0049] For example, the first support 11 and the second support 21 may both be provided with the receiving groove 211 on the connection surface, or the receiving groove 211 may be provided only in the first support 11 or only in the second support 21, which is not limited here. Figure 5 In the example shown, the receiving groove 211 is arranged on the connecting surface of the second support 21, while the receiving groove 211 is not arranged on the first support 11. In this way, the first mounting portion 111 and the second mounting portion 112 can be arranged to protrude from the connecting surface of the first support 11. When the beam splitter 13 is installed on the first mounting portion 111 and the reflector 14 is installed on the second mounting portion 112, it is possible to avoid being blocked by the side wall of the receiving groove 211, thereby improving the convenience of installing the beam splitter 13 and the reflector 14.

[0050] Optionally, when the first support 11 and the second support 21 are connected, certain sealing measures can be set between the connecting surfaces of the two, such as setting a second sealing ring 2111, so as to further improve the sealing effect of the accommodating cavity 212, prevent external water vapor, dust, etc. from invading the accommodating cavity 212, and improve the service life of the reflector 14.

[0051] In some embodiments, the second support 21 is provided with a transmission light channel 213 for the transmission light beam L1 of the beam splitter 13 to pass through, the first photosensitive structure 22 is arranged at the exit end of the transmission light channel 213, and the second optical module 20 further includes an aperture assembly 24, which is detachably arranged at the entrance end of the transmission light channel 213. By setting the aperture assembly 24, on the one hand, the light intensity received by the first photosensitive structure 22 can be adjusted by adjusting the size of the middle opening, thereby adjusting the light intensity ratio of the monitoring light path and the calibration light path, so that the monitoring light path and the calibration light path have approximately the same light intensity, and the best light intensity working range of the first photosensitive structure 22 is obtained. On the other hand, the aperture assembly 24 can also be used to eliminate stray light and improve the monitoring effect of the first photosensitive structure 22. By setting the aperture and the second support 21 in a detachable connection, different apertures can be selected according to actual needs, or it can be selected whether to use the aperture, thereby improving the versatility of the monitoring device 100.

[0052] Exemplarily, the aperture includes an aperture base 241 and an aperture piece 242. The aperture piece 242 is fixed in the hole corresponding to the aperture base 241 by glue, and the size of the middle opening can be adjusted by adjusting the aperture piece 242. The aperture base 241 can be made of a plastic material coated with glue. When the aperture base 241 is installed at the entrance end of the transmitted light channel 213, the aperture itself can be fixed, and the transmitted light channel 213 can be sealed to prevent external dust from entering the transmitted light channel 213.

[0053] In some embodiments, the second optical module 20 further includes two window pieces 25 spaced apart in the transmission light channel 213, the portion between the two window pieces 25 of the transmission light channel 213 forms a sealing section 2131, the aperture assembly 24 and the first photosensitive structure 22 are both arranged outside the sealing section 2131, and the sample channel 30 is connected to the sealing section 2131. By providing the window piece 25, the sealing section 2131 in the transmission light channel 213 can be blocked and sealed, and the sealing section 2131 is used to connect with the sample channel 30, so that the sample can enter the irradiation range of the transmission light, and the sample can be prevented from leaking from the sealing section 2131 to affect the normal operation of the first photosensitive structure 22 or the aperture, thereby ensuring that the sealing section 2131 has a good sealing effect.

[0054] It can be understood that the window piece 25 can be a flat lens with light transmission function and does not deflect or reflect the light. The window piece 25 is used to seal the sealing section 2131, and it is necessary to consider that the window piece 25 should reduce the loss effect on the transmitted light. Therefore, the window piece 25 can use a flat lens with high light transmittance and good light transmission effect.

[0055] In some embodiments, at least one of the inlet and outlet ends of the transmission light channel 213 is provided with a second mounting groove 2132, the second mounting groove 2132 is connected to the transmission light channel 213, and the window piece 25 is arranged in the second mounting groove 2132; the second optical module 20 further includes a second pressing block 26, the second pressing block 26 is arranged in the second mounting groove 2132 and is located on the side of the window piece 25 away from the sealing section 2131, the second pressing block 26 can transmit light, the second pressing block 26 is used to abut the window piece 25 against the bottom of the second mounting groove 2132, and the second pressing block 26 is threadedly connected to the second mounting groove 2132. By providing the second mounting groove 2132 and the second pressing block 26, the window piece 25 can be further pressed against the two ends of the sealing section 2131, thereby improving the sealing effect of the window piece 25. The second clamping block 26 is threadedly connected to the second mounting groove 2132. For example, an internal thread may be provided at one end of the opening of the second mounting groove 2132, and an external thread may be provided at the second clamping block 26. The two are screwed together to fix the second clamping block 26 in the second mounting groove 2132. Compared with the screw fixing method, the method of directly screwing the second clamping block 26 to the second mounting groove 2132 can save the reserved position for screw installation, making the structure of the second support 21 more compact, which is helpful to realize the miniaturization design of the second optical module 20.

[0056] Optionally, a third sealing ring 2133 may be further disposed between the window piece 25 and the bottom of the second mounting groove 2132 , and the sealing effect between the window piece 25 and the sealing section 2131 may be further improved through the compression of the window piece 25 .

[0057] Optionally, referring to the first clamping block 16 provided above, the second clamping block 26 can be a transparent, light-transmitting block that has no deflection effect on light, or a hollow structure with a middle portion configured to adapt to the light path channel, or a structure with a middle portion configured as a light-transmitting structure and opaque settings on all sides, such as setting a light-transmitting structure in the middle of an originally opaque material, or coating the surrounding areas of an originally overall light-transmitting material with a light-shielding paint to create a light-transmitting effect in the middle, and the present application does not impose any limitation on this.

[0058] In some embodiments, see Figure 7 The sample channel 30 is arranged to intersect with the sealing section 2131, and a sample inlet 31 and a sample outlet 32 ​​are formed on the side wall of the sealing section 2131. The sample inlet 31 and the sample outlet 32 ​​are arranged in a staggered manner along the sample flow direction. By staggering the sample inlet 31 and the sample outlet 32, the length proportion of the water flow in the sealing section 2131 can be increased, thereby increasing the renewal rate of the water in the sealing section 2131, and then increasing the monitoring response speed of the system, which helps to transmit light through the sample for monitoring and improves the accuracy of monitoring.

[0059] For example, the sample can enter the sample channel 30 continuously in the form of running water, so that the sample can be monitored by the monitoring device 100. Alternatively, the sample can also be introduced into the sample channel 30 in a pre-sampling manner. The sample can be monitored in the sample channel 30 in a continuous flow or with a certain dwell interval, which is not limited in this application.

[0060] In some embodiments, the second support 21 is provided with a transmission light channel 213 for the transmission light beam L1 of the spectroscope 13 to pass through, and a calibration light channel 214 for the reflected light of the spectroscope 13 to pass through, the transmission light channel 213 and the calibration light channel 214 are arranged in parallel, the first photosensitive structure 22 is arranged at the exit end of the transmission light channel 213, the second photosensitive structure 23 is arranged at the exit end of the calibration light channel 214, and the first photosensitive structure 22 and the second photosensitive structure 23 are arranged in the same plane at one end of the second support 21. By arranging the transmission light channel 213 and the calibration light channel 214 in parallel, the arrangement of the monitoring light path and the calibration light path can be simplified, and the structure of the second support 21 can also be simplified. By arranging both the first photosensitive structure 22 and the second photosensitive structure 23 at one end of the second support 21 and arranging them in the same plane, the installation of the two photosensitive structures can be simplified, and the structure of the second optical module 20 is made simpler and more compact, which helps to realize the miniaturization design of the detection device as a whole.

[0061] In the description of this specification, if the reference terms "one embodiment", "some examples", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0062] The above describes the implementation methods of the present application in detail in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

[0063] In the description of this application, if "," appears in the patent name, it means an "and" relationship, not an "or" relationship. For example, if the patent name is "a kind of A, B", it means that the content required to be protected by this application is: the technical solution with the subject name A and the technical solution with the subject name B.

Claims

1. A total organic carbon monitoring device, characterized in that: include A first optical module comprises a first support, a light source and a beam splitter arranged on the first support, wherein the beam splitter is arranged at the light output side of the light source, and is used to split the light of the light source into a transmission light beam and a first reflected light beam; A second optical module comprises a second support and a first photosensitive structure and a second photosensitive structure disposed on the second support, wherein the second support is connected to the first support, the first photosensitive structure is disposed on a light-emitting side of the transmitted light beam of the beam splitter, and the second photosensitive structure is disposed on a light-emitting side of the first reflected light beam of the beam splitter; A sample channel is arranged on the second support, and at least a part of the sample channel is located in the light path of the transmission light beam of the beam splitter and is located on the light incident side of the first photosensitive structure.

2. The total organic carbon monitoring device according to claim 1, characterized in that: The first optical module also includes a reflector, which is arranged on the first support and is located on the light-emitting side of the first reflected light beam of the beam splitter, so as to reflect the first reflected light beam into a second reflected light beam and transmit it to the second photosensitive structure, and the second reflected light beam is arranged parallel to the transmitted light beam.

3. The total organic carbon monitoring device according to claim 2, characterized in that: The first support is provided with a first mounting portion and a second mounting portion at intervals, the first mounting portion is provided with a first light-transmitting hole, the beam splitter is arranged on the first mounting portion, the first light-transmitting hole is used for the first reflected light beam to pass through, and the reflector is arranged on the second mounting portion.

4. The total organic carbon monitoring device according to claim 3, characterized in that: The first mounting portion has a first mounting surface, the first light-transmitting hole penetrates the first mounting surface along the direction of the first reflected light beam, the beam splitter is fixed on the first mounting surface, the second mounting portion has a second mounting surface, the reflector is fixed on the second mounting surface, and the first mounting surface is parallel to the second mounting surface.

5. The total organic carbon monitoring device according to claim 3, characterized in that: The first optical module further includes a convex lens, which is disposed on the light incident side of the beam splitter to form the light from the light source into parallel light; A first mounting groove is provided on the first support, and the first mounting groove is arranged on the side of the first mounting part facing the light source. The convex lens is arranged in the first mounting groove. The first mounting part is also provided with a second light-transmitting hole, one end of the second light-transmitting hole is connected to the first mounting groove, and the other end is connected to the first light-transmitting hole. The second light-transmitting hole is used for allowing the light of the convex lens to pass into the spectroscope.

6. The total organic carbon monitoring device according to claim 5, characterized in that: The first optical module also includes a first clamping block, which is arranged in the first mounting groove and located on the light incident side of the convex lens. The first clamping block can transmit the light of the light source. The first clamping block is used to abut the convex lens against the bottom of the first mounting groove. The light source is arranged on the side of the first clamping block away from the convex lens.

7. The total organic carbon monitoring device according to claim 3, characterized in that: The first support has a connecting surface for connecting with the second support, the first mounting portion and the second mounting portion are arranged on the connecting surface, and the connecting surface of at least one of the first support and the second support is provided with a receiving groove, and when the first support is connected to the second support, the receiving groove is closed to form a receiving cavity, so that the first mounting portion and the second mounting portion are both located in the receiving cavity.

8. The total organic carbon monitoring device according to any one of claims 1 to 7, characterized in that: The second support is provided with a transmission light channel for the transmission light beam of the spectroscope to pass through, the first photosensitive structure is arranged at the outlet end of the transmission light channel, and the second optical module also includes an aperture assembly, and the aperture assembly is detachably arranged at the inlet end of the transmission light channel.

9. The total organic carbon monitoring device according to claim 8, characterized in that: The second optical module also includes two window pieces spaced apart in the transmission light channel, the portion between the two window pieces of the transmission light channel forms a sealing section, the aperture assembly and the first photosensitive structure are both arranged outside the sealing section, and the sample channel is connected to the sealing section.

10. The total organic carbon monitoring device according to claim 9, characterized in that: At least one of the inlet end and the outlet end of the transmission light channel is provided with a second installation groove, the second installation groove is connected to the transmission light channel, and the window piece is arranged in the second installation groove; The second optical module also includes a second clamping block, which is arranged in the second mounting groove and located on the side of the window piece away from the sealing section. The second clamping block can transmit light. The second clamping block is used to abut the window piece against the bottom of the second mounting groove. The second clamping block is threadedly connected to the second mounting groove.

11. The total organic carbon monitoring device according to claim 9, characterized in that: The sample channel is arranged to intersect with the sealing section, and a sample inlet and a sample outlet are formed on the side wall of the sealing section. The sample inlet and the sample outlet are arranged in a staggered manner along the sample flow direction.

12. The total organic carbon monitoring device according to any one of claims 1 to 7, characterized in that: The second support is provided with a transmission light channel for the transmission light beam of the beam splitter to pass through, and a calibration light channel for the reflected light of the beam splitter to pass through, the transmission light channel and the calibration light channel are arranged in parallel, the first photosensitive structure is arranged at the exit end of the transmission light channel, the second photosensitive structure is arranged at the exit end of the calibration light channel, and the first photosensitive structure and the second photosensitive structure are arranged coplanarly at one end of the second support.

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