Laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy

Abstract

The present invention relates to the technical field of in-situ detection of soil-groundwater pollution, and particularly to a laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy. A laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy is used to detect pollutants in a to-be-detected area in a laboratory, and includes a laser emitter, a detection component, and a fluorescence receiving and data processor; the in-situ detection device further includes a housing, the housing is provided with an inner cavity for accommodating the detection component, and in use, the housing is placed in the to-be-detected area, the laser emitter emits laser to the to-be-detected area, the pollutants in the to-be-detected area generate fluorescence, the detection component detects the fluorescence and transmits it to the fluorescence receiving and data processor, and the detection component can lift and lower in the inner cavity to detect pollutants in the to-be-detected area at different depths. The present invention can provide detection conditions for studying the migration and distribution of DNAPLs pollutants, identifying pollutant types, and spectral identification of composite pollutants in a laboratory.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ detection of soil - groundwater pollution, and particularly to a laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy. Background Art

[0002] Dense non-aqueous phase liquids (DNAPLs) refer to a common type of organic pollution among many substances causing groundwater or soil pollution. Their migration and transformation processes are very complex, with characteristics such as deep burial, diverse phases, slow migration, and long-lasting pollution. At the same time, the migration and transformation processes of DNAPLs pollutants in water or soil environments are jointly affected by various factors such as their physical and chemical properties, hydrogeological conditions, and hydrogeochemical conditions.

[0003] In the prior art, DNAPLs of water or soil pollutants are generally detected by laser-induced fluorescence spectroscopy. Due to the complex migration and transformation processes of DNAPLs and being affected by various factors, it is impossible to finely identify pollutant types or perform spectral identification for composite pollutants, and long-term systematic research in the laboratory is required. Currently, there is a lack of in-situ detection devices suitable for the laboratory. Summary of the Invention

[0004] In view of this, it is necessary to provide a laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy, which can be used for in-situ detection of pollutants in the laboratory.

[0005] A laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy provided by the present invention is used to detect pollutants in a detection area to be detected in the laboratory, and includes a laser emitter, a detection component, and a fluorescence receiving and data processor. The detection component is electrically connected to the laser emitter and the fluorescence receiving and data processor respectively; the laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy further includes a housing. The housing is provided with an inner cavity for accommodating the detection component. During use, the housing is placed in the detection area to be detected. The laser emitter emits laser to the detection area to be detected, and the pollutants in the detection area to be detected generate fluorescence and pass through the housing. The detection component detects the fluorescence and transmits it to the fluorescence receiving and data processor. The detection component can lift in the inner cavity to detect pollutants at different depths in the detection area to be detected.

[0006] The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy of the present invention is applicable to laboratories, facilitating the study of the migration and transformation processes of DNAPLs in laboratories, or the influence of physical and chemical properties, hydrogeological conditions, and hydrogeochemical conditions on their migration processes. The housing can protect the internal detection components, can be embedded in the experimental box, and can also provide space for the lifting of the detection components. There is no need to set up a drill to excavate the soil, and the lifting detection components can finely detect the pollutants in the area to be detected at different depths.

[0007] In one embodiment, at least one side surface of the housing is provided as a light-transmitting member.

[0008] It can be understood that the light-transmitting member can transmit laser and fluorescence, and can block the objects to be detected from entering the housing and affecting the detection components.

[0009] In one embodiment, the detection component includes an optical mirror, the optical mirror is arranged in the inner cavity, the laser emitter includes an emitting head, the emitting head extends into the inner cavity and is arranged towards the optical mirror, and the optical mirror can change the optical path of the laser emitted by the emitting head to emit the laser emitted by the emitting head to the light-transmitting member.

[0010] It can be understood that the optical mirror can change the optical path of the laser, so that the vertically emitted laser can be horizontally emitted to the area to be detected.

[0011] In one embodiment, the detection component further includes a fixing frame and a fluorescence probe. One side of the fixing frame is open, the opening of the fixing frame faces the light-transmitting member, and the optical mirror and the fluorescence probe are fixed in the fixing frame.

[0012] It can be understood that the fixing frame can integrate components such as the optical mirror and the fluorescence probe together and lift them as a whole.

[0013] In one embodiment, elastic limiting members are provided on the periphery of the fixing frame. One end of the elastic limiting member is arranged on the fixing frame, and the other end abuts against the inner wall of the housing.

[0014] It can be understood that the elastic limiting members play a limiting role to prevent the detection component from shaking. Moreover, the elastic limiting members can enable the detection component to slide smoothly.

[0015] In one embodiment, the housing includes a containing portion and a supporting portion. The containing portion is connected to the supporting portion. One side surface of the containing portion is the light-transmitting member. The supporting portion is arranged at one end of the containing portion and extends in a direction away from the central axis of the containing portion.

[0016] It is understandable that the setting of the support part can strengthen the overall stability of the in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy.

[0017] In one embodiment, the in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy further includes a lifting assembly. One end of the lifting assembly is connected to the detection assembly, and the other end extends out of the inner cavity for driving the detection assembly to lift.

[0018] In one embodiment, the lifting assembly includes a rack and a driver. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy further includes a support frame. The support frame is fixedly connected to the housing. The driver is fixed on the support frame and meshes with the rack to drive the rack to move. The rack penetrates through the support frame. One end of the rack is connected to the detection assembly, and the other end extends out of the inner cavity.

[0019] It can be understood that the setting of the support frame can not only make the structure of the in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy more stable, but also provide a platform for the installation of the driver.

[0020] In one embodiment, the in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy further includes a scale. The scale is connected to the detection assembly and moves up and down with the detection assembly.

[0021] It is understandable that the scale can display the depth of the corresponding detection area where the detection assembly is located.

[0022] In one embodiment, the in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy further includes a cable trough box. The cable trough box is connected to the detection assembly and used for wire harness threading. The lifting assembly includes a rack connected to the detection assembly. The cable trough box is attached to one side of the rack, and the scale is attached to the side of the cable trough box away from the rack; or, the scale is attached to one side of the rack, and the cable trough box is attached to the side of the scale away from the rack.

[0023] With such a setting, the structure can be made more compact.

[0024] The present invention designs an in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy for the laboratory, providing detection conditions for studying the migration and distribution of DNAPLs pollutants, identifying pollutant types, and spectral identification of composite pollutants in the laboratory. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy according to an embodiment of the present invention;

[0027] Figure 2 It is a schematic internal structure diagram of the fixed frame;

[0028] Figure 3 It is a top view of the detection component and the housing.

[0029] 100. Laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy; 10. Laser emitter; 11. Emitter head; 12. Main body; 20. Detection component; 21. Optical mirror; 211. Connecting frame; 2111. First frame; 2112. Second frame; 22. Fixed frame; 221. Elastic limiting member; 222. Bracket; 23. Fluorescence probe; 30. Fluorescence receiving and data processor; 40. Housing; 401. Inner cavity; 41. Translucent member; 42. Accommodating portion; 43. Supporting portion; 50. Lifting component; 51. Rack; 52. Driver; 521. Gear; 60. Support frame; 70. Scale; 80. Cable trough box. Detailed implementation manners

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0031] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present invention are only for the purpose of illustration and do not represent the only implementation manner.

[0032] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature or indirectly contact the second feature through an intermediate medium when the first feature is "on" or "under" the second feature. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the description of the present invention have the same meaning as commonly understood by those skilled in the technical field to which the present invention pertains. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in the description of the present invention includes any and all combinations of one or more of the related listed items.

[0035] The present invention provides a laboratory-scale in-situ detection device 100 based on laser-induced fluorescence spectroscopy (hereinafter referred to as the in-situ detection device), which is applicable to detecting the types and concentrations of pollutants in a detection area in a laboratory. The object to be detected can be soil, groundwater, etc., and the pollutants can be heavy non-aqueous phase liquid pollutants.

[0036] Please refer to Figure 1 , the in-situ detection device 100 includes a laser emitter 10, a detection component 20, and a fluorescence receiving and data processor 30. The detection component 20 is electrically connected to the laser emitter 10 and the fluorescence receiving and data processor 30 respectively. The laser emitter 10 emits laser towards the detection area. The energy of the laser photons is absorbed by the molecules and atoms of the pollutants in the detection area, causing the ground state to transition. The molecules or atoms in the high-energy state will return to the ground state due to instability and release energy during this process, emitting fluorescence. The detection component 20 detects the fluorescence and transmits it to the fluorescence receiving and data processor 30, and the fluorescence receiving and data processor 30 analyzes the types and concentrations of the molecules and atoms of the pollutants.

[0037] The in-situ detection device 100 further includes a housing 40. The housing 40 is provided with an inner cavity 401 for accommodating the detection component 20. The detection component 20 can lift and lower in the inner cavity 401. When using the in-situ detection device 100, the housing 40 is placed in an experimental box in the laboratory, and then the object to be detected is placed in the gap formed between the housing 40 and the experimental box. The gap between the housing 40 and the experimental box forms the detection area. The fluorescence in the detection area can pass through the housing 40 and be detected by the detection component 20. The housing 40 can not only protect the internal detection component 20, but also provide a lifting space for the detection component 20. The present invention is applied in the laboratory. The housing 40 can be pre-buried. The detection component 20 that lifts and lowers in the inner cavity 401 can detect pollutants at different depths. The detection component 20 lifts and lowers inside the housing 40 without being blocked by the object to be detected, and there is no need to set up a drill to dig the soil. The structure is simple, providing a device for the laboratory to detect the concentration and type of pollutants, and providing conditions for finely studying the migration and transformation process of DNAPLs.

[0038] At least one side surface of the housing 40 is provided as a light-transmitting member 41, so that laser can be emitted from the light-transmitting member 41 to the detection area, and fluorescence can pass through the light-transmitting member 41 and be detected by the detection component 20.

[0039] In one embodiment, one side surface of the housing 40 is provided as a light-transmitting member 41, and the other side surfaces are not provided as light-transmitting, which can save costs. Of course, in other embodiments, two, three, four side surfaces can also be provided as light-transmitting surfaces, or the entire housing 40 can be provided as light-transmitting.

[0040] Preferably, the light-transmitting member 41 is sapphire glass, which has high optical transparency, high hardness, scratch resistance, and chemical resistance.

[0041] In one embodiment, the light-transmitting member 41 extends from one end of the housing 40 to the other end, so as to provide sufficient light-transmitting conditions, enabling the detection component 20 to detect fluorescence in all directions.

[0042] Furthermore, the other side surfaces of the housing 40, that is, the side surfaces except the side surface provided with the light-transmitting member 41, are made of polyether ketone (PEK), so that the housing 40 has corrosion resistance.

[0043] In one embodiment, the sapphire glass and the other part of the housing 40 are connected by a wedge shape, which is convenient to connect and has a simple structure. Of course, in other embodiments, they can also be connected by gluing, bolt connection, etc.

[0044] Specifically, the housing 40 includes a receiving portion 42 and a supporting portion 43. The receiving portion 42 and the supporting portion 43 are connected. The inner cavity 401 is formed in the receiving portion 42. The supporting portion 43 is provided at one end of the receiving portion 42 and extends in a direction away from the central axis of the receiving portion 42. During detection, the supporting portion 43 covers the surface of the object to be detected, making the housing 40 more stable during use.

[0045] In one embodiment, the receiving portion 42 is in a cube shape. In other embodiments, the receiving portion 42 can be a cylinder or other shapes.

[0046] One end of the receiving portion 42 has an opening communicating with the inner cavity 401. The opening of the receiving portion 42 allows the detection assembly 20 to enter and exit. That is, the opening of the receiving portion 42 is formed in the upper part, and the bottom is sealed to prevent the object to be detected from entering the inner cavity 401 and affecting the detection assembly 20.

[0047] The receiving portion 42 and the supporting portion 43 are vertically arranged, making the supporting portion 43 fit more closely to the surface of the detection area.

[0048] Please refer to Figure 2 , the detection assembly 20 includes an optical mirror 21. The optical mirror 21 is disposed in the inner cavity 401 and is used to change the optical path of the laser so that the laser can be projected onto the light-transmitting member 41 and then emitted to the detection area. The laser emitter 10 includes a main body 12 and an emitting head 11. The main body 12 is disposed outside the housing 40, and the emitting head 11 extends into the inner cavity 401 and emits laser light toward the optical mirror 21, which is reflected or refracted by the optical mirror 21 to the light-transmitting member 41.

[0049] In one embodiment, the optical mirror 21 is a right-angle prism, and one of the right-angle sides is used for installation and fixation, and the right-angle inclined surface is inclined toward the light-transmitting member 41.

[0050] A connecting frame 211 is provided on the optical mirror 21 for fixing the emitting head 11 of the laser emitter 10. The connecting frame 211 includes a first frame 2111 and a second frame 2112. The first frame 2111 is connected to the optical mirror 21, and the second frame 2112 extends in the direction toward the light-transmitting member 41 so that the connecting frame 211 forms a "Г" shape or a "T" shape. The emitting head 11 passes through the second frame 2112 to fix the emitting head 11.

[0051] The detection assembly 20 further includes a fixing frame 22 and a fluorescence probe 23. One side of the fixing frame 22 is open, the opening of the fixing frame 22 faces the light-transmitting member 41, and the optical mirror 21 and the fluorescence probe 23 are disposed inside the fixing frame 22.

[0052] Please refer to Figure 3, an elastic limiting member 221 is provided on the peripheral side of the fixed frame 22. One end of the elastic limiting member 221 is connected to the fixed frame 22, and the other end abuts against the inner wall of the housing 40. Since the detection assembly 20 needs to move up and down, by providing the elastic limiting member 221, on the one hand, the detection assembly 20 is stabilized to prevent it from shaking, and on the other hand, the elastic limiting member enables the detection assembly 20 to slide smoothly. The elastic limiting member 221 can be an element with a certain elasticity such as a rubber pad or plastic.

[0053] In one embodiment, the fixed frame 22 is a cuboid, and the elastic limiting members 221 are provided in 12 numbers, with 4 provided at the bottom, middle and top respectively, and the 4 elastic limiting members 221 are respectively arranged at the four corners. In other embodiments, the number of elastic limiting members 221 can be adjusted according to the different shapes of the fixed frame 22. For example, if the fixed frame 22 is relatively short in height, 8 elastic limiting members 221 can be provided.

[0054] The fixed frame 22 has the same shape as the accommodating portion 42, so that the fixed frame 22 can be better adapted to the accommodating portion 42.

[0055] Furthermore, a bracket 222 is provided on the top of the fixed frame 22, and the bracket 222 is used to connect other components.

[0056] The fluorescence probe 23 and the emitting head 11 are integrated into one body, thereby saving the internal space of the fixed frame 22. The fluorescence probe 23 has two optical cables built in, one connected to the main body 12 of the laser emitter 10, and the other connected to the fluorescence receiving and data processor 30.

[0057] The in-situ detection device 100 further includes a lifting assembly 50, and the lifting assembly 50 is connected to the detection assembly 20 for driving the detection assembly 20 to lift.

[0058] Specifically, the lifting assembly 50 is connected to the bracket 222, which can enhance the connection strength. The bracket 222 can be a cube or a cylinder.

[0059] In one embodiment, the lifting assembly 50 includes a rack 51 and a driver 52. The rack 51 extends into the housing 40 from the opening and is connected to the bracket 222. The driver 52 meshes with the rack 51 to drive the rack 51 to move up and down, thereby driving the detection assembly 20 to move up and down. In other embodiments, the lifting assembly 50 can also be a telescopic cylinder, and the telescopic rod of the telescopic cylinder is connected to the detection assembly 20, and the telescopic cylinder expands and contracts to drive the detection assembly 20 to lift.

[0060] The driver 52 includes a gear 521 and a motor (not shown in the figure). The gear 521 is provided on the output shaft of the motor. The in-situ detection device 100 further includes a support frame 60. The motor is fixed on the support frame 60. The support frame 60 is connected to the housing 40. The rack 51 passes through the support frame 60. Since the motor is fixedly installed, the gear 521 does not displace in the height position. When the gear 521 rotates, it causes the rack 51 to move up and down. The setting of the support frame 60 provides a platform for the placement of the driver 52, and its connection with the housing 40 makes the in-situ detection device 100 more stable.

[0061] In one embodiment, the cross-section of the support frame 60 is trapezoidal, and the lower base close to the housing 40 is longer than the upper base far from the housing 40, further strengthening the stability of the in-situ detection device 100.

[0062] The in-situ detection device 100 further includes a scale 70. The scale 70 is connected to the detection component 20 and rises and falls with the detection component 20. The scale 70 can clearly display the depth position where the detection component 20 is located, so as to accurately depict the objects to be detected at different depths.

[0063] The scale 70 is vertically placed, passes through the support frame 60 and extends into the housing 40 from the opening and is connected to the bracket 222.

[0064] The in-situ detection device 100 further includes a cable trough box 80. The cable trough box 80 is connected to the bracket 222 and is used for the threading of wire harnesses. The optical fiber of the laser emitter 10 passes through the cable trough box 80 and also passes through the fixed frame 22. The cable of the laser emitter 10 passes through the cable trough box 80, and its emitting head 11 extends into the fixed frame 22 until it is close to the optical mirror 21, so as to emit laser light towards the optical mirror 21.

[0065] In one embodiment, the cable trough box 80 is attached to one side of the rack 51, and the scale 70 is attached to the side of the cable trough box 80 away from the rack 51. With such a setting, not only is the structure more compact and stable, but also, by placing the scale 70 on one side, it is convenient for the human eye to observe the depth where the detection component 20 is located without being blocked.

[0066] In another embodiment, the scale 70 is attached to one side of the rack 51, and the cable trough box 80 is attached to the side of the scale 70 away from the rack 51. Placing the cable trough box 80 on one side facilitates the installation of the wire harness in the cable trough box 80.

[0067] During use, first place the housing 40 into the experimental chamber, and then fill the gap between the housing 40 and the experimental chamber with the object to be detected. The detection assembly 20 can move up and down in the housing 40 unobstructed to detect pollutants in the detection areas to be detected at different depths. The drive motor rotates, thereby driving the gear 521 to rotate. The gear 521 meshes with the rack 51, thereby driving the rack 51 to move downward and moving the detection assembly 20 to the position corresponding to the scale. The transmitting head 11 emits laser light. After being reflected by the right-angle prism, the laser light is emitted to the light-transmitting member 41 and then emitted to the detection area to be detected. Adjust the laser wavelength. When the energy of the laser photons matches the energy level of the molecules or atoms of a certain pollutant in the detection area to be detected, the molecules or atoms will absorb the photon energy and jump to the high-energy state. The molecules or atoms in the high-energy state are unstable and will return to the ground state, releasing energy to generate fluorescence at the same time. The fluorescence probe 23 detects the fluorescence and sends it to the fluorescence receiver and data processor 30. The fluorescence receiver and data processor 30 analyzes the type and concentration of the pollutant. The in-situ detection device 100 of the present invention can provide detection conditions for accurately depicting the migration distribution of DNAPLs pollutants, identifying the types of pollutants, and spectral identification of composite pollutants in the laboratory.

[0068] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0069] Those of ordinary skill in the art of the present technology should recognize that the above embodiments are only used to illustrate the present invention and are not used to limit the present invention. As long as appropriate changes and variations are made to the above embodiments within the spirit of the present invention, they fall within the scope of the present invention claimed.

Claims

1. A laboratory-scale in-situ detection device based on laser-induced fluorescence spectroscopy for detecting pollutants in a detection area in a laboratory, comprising a laser emitter (10), a detection component (20), and a fluorescence receiving and data processor (30), wherein the detection component (20) is respectively connected to the laser emitter (10) and the fluorescence receiving and data processor (30); It is characterized in that The laboratory-scale in-situ detection device (100) based on laser-induced fluorescence spectroscopy further comprises a housing (40). The housing (40) is provided with an inner cavity (401) for accommodating the detection component (20). During use, the housing (40) is placed in the detection area. The laser emitter (10) emits laser light to the detection area. Pollutants in the detection area generate fluorescence and pass through the housing (40). The detection component (20) detects the fluorescence and transmits it to the fluorescence receiving and data processor (30). The detection component (20) can be lifted and lowered in the inner cavity (401) to detect pollutants in the detection area at different depths; The detection component (20) further comprises a fixing frame (22). Elastic limiters (221) are arranged on the peripheral side of the fixing frame (22). One end of the elastic limiter (221) is arranged on the fixing frame (22), and the other end abuts against the inner wall of the housing (40); The laboratory-scale in-situ detection device (100) based on laser-induced fluorescence spectroscopy further comprises a lifting component (50). One end of the lifting component (50) is connected to the detection component (20), and the other end extends out of the inner cavity (401) for driving the detection component (20) to lift and lower; The laboratory-scale in-situ detection device (100) based on laser-induced fluorescence spectroscopy further comprises a scale (70). The scale (70) is connected to the detection component (20) and rises and falls with the detection component (20).

2. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy according to claim 1, wherein At least one side surface of the housing (40) is provided as a light-transmitting member (41).

3. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy according to claim 2, characterized in that, The detection component (20) comprises an optical mirror (21). The optical mirror (21) is arranged in the inner cavity (401). The laser emitter (10) comprises an emission head (11). The emission head (11) extends into the inner cavity (401) and is arranged towards the optical mirror (21). The optical mirror (21) can change the optical path of the laser emitted by the emission head (11) to emit the laser emitted by the emission head (11) to the light-transmitting member (41).

4. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy according to claim 3, wherein The detection component (20) further comprises a fluorescence probe (23). One side of the fixing frame (22) is open. The opening of the fixing frame (22) faces the light-transmitting member (41). The optical mirror (21) and the fluorescence probe (23) are fixed in the fixing frame (22).

5. The in-situ detection device at laboratory scale based on laser-induced fluorescence spectroscopy according to claim 2, wherein The housing (40) includes a receiving portion (42) and a supporting portion (43). The receiving portion (42) is connected to the supporting portion (43). One side surface of the receiving portion (42) is the light-transmitting member (41). The supporting portion (43) is provided at one end of the receiving portion (42) and extends in a direction away from the central axis of the receiving portion (42).

6. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy according to claim 1, characterized in that, The lifting assembly (50) includes a rack (51) and a driver (52). The laboratory-scale in-situ detection device (100) based on laser-induced fluorescence spectroscopy further includes a support frame (60). The support frame (60) is fixedly connected to the housing (40). The driver (52) is fixed on the support frame (60) and meshes with the rack (51) to drive the rack (51) to move. The rack (51) passes through the support frame (60). One end of the rack (51) is connected to the detection assembly (20), and the other end extends outside the inner cavity (401).

7. The in-situ detection device at the laboratory scale based on laser-induced fluorescence spectroscopy according to claim 1, wherein The laboratory-scale in-situ detection device (100) based on laser-induced fluorescence spectroscopy further includes a cable trough box (80). The cable trough box (80) is connected to the detection assembly (20) and is used for the threading of wire harnesses. The lifting assembly (50) includes a rack (51) connected to the detection assembly (20). The cable trough box (80) is attached to one side of the rack (51). The scale (70) is attached to the side of the cable trough box (80) away from the rack (51); or, the scale (70) is attached to one side of the rack (51), and the cable trough box (80) is attached to the side of the scale (70) away from the rack (51).

Images