Portable water nutrient element analysis device

Abstract

The utility model provides a portable water body nutrient element analysis device which comprises a mounting plate, an XY plane motion mechanism, a heater, a laser, a reflector, a transmitting mirror and a spectrograph are arranged on the mounting plate, a base plate is arranged on the XY plane motion mechanism, and the heater is located below the base plate; the reflecting mirror is located above the transmitting mirror, the transmitting mirror is located above the substrate, the laser directly faces the reflecting mirror, and laser of the laser can be focused on the substrate through the reflecting mirror and the transmitting mirror in sequence; and a probe of the spectrograph is positioned below the transmitting mirror. The device is small in size and can be integrally carried along with a mounting plate, so that online in-situ real-time detection is realized; the position of the substrate is adjusted through the XY plane motion mechanism, so that the sample is convenient to dropwise add; the sample is dried by the heater, and the temperature of the sample is increased, so that the spectrum stability is improved, the detection sensitivity is good, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to a portable water body nutrient element analysis device. Background Art

[0002] The quantitative analysis results of water nutrient elements are important indicators for evaluating the health status of water quality. For example, excessive content of N and P elements in water will cause eutrophication of the water body, and excessive content of K elements in water will cause water pollution.

[0003] At present, the main method for elemental analysis is Laser-Induced Breakdown Spectroscopy (LIBS). The laser pulse generated by the laser is focused on the sample surface to generate plasma, and the optical signal of the plasma is collected by the optical fiber probe of the spectrometer, which is converted into an electrical signal by the spectrometer and transmitted to the computer for analysis. In this way, the elemental composition of the sample can be identified, and then the material can be identified, classified, qualitatively and quantitatively analyzed. LIBS instruments on the market include LIBS-Tracer analyzer, slurry grade online analyzer, LIBS coal quality online analysis system, etc.

[0004] However, the current LIBS instruments are large and cannot be used for online in-situ real-time detection of water bodies. In addition, the plasma intensity of water bodies is weak, and the detection accuracy of LIBS direct detection is low, which cannot achieve accurate detection. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to realize online in-situ real-time detection of water elements and ensure the accuracy of the detection.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] The utility model provides a portable water body nutrient element analysis device, comprising a mounting plate, wherein an XY plane motion mechanism, a heater, a laser, a reflector, a transmission mirror and a spectrometer are arranged on the mounting plate, a substrate is arranged on the XY plane motion mechanism, the heater is located below the substrate; the reflector is located above the transmission mirror, the transmission mirror is located above the substrate, the laser is directly facing the reflector, and the laser energy of the laser is focused on the substrate through the reflector and the transmission mirror in sequence; and the probe of the spectrometer is located below the transmission mirror.

[0008] The beneficial effects of the utility model are:

[0009] The utility model has a small size and can be carried as a whole with the mounting plate, realizing online in-situ real-time detection; the position of the substrate is adjusted by the XY plane motion mechanism, the sample is convenient to drip, and the use is convenient, and the laser is focused on the substrate to ensure reliable excitation of the sample; the sample is dried by the heater and the temperature of the substrate is increased at the same time, which is convenient for plasma emission and improves the detection sensitivity.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, a microscope camera is provided above the reflector, and the microscope camera is fixed on the mounting plate; the reflector is a semi-reflector and can transmit light from bottom to top.

[0012] The image information on the substrate is collected by a microscope camera, which facilitates the auxiliary control of the laser focusing on the substrate and improves the detection accuracy.

[0013] Furthermore, the mounting plate is also provided with an illumination lamp, which can illuminate the substrate.

[0014] When the substrate is focused, the substrate can be illuminated, the image clarity of the microscope camera is improved, and the focusing operation is convenient.

[0015] Furthermore, a controller is also provided on the mounting plate, and the lighting lamp, microscope camera, XY plane motion mechanism, heater, laser and spectrometer are respectively connected to the controller through signals.

[0016] The control switches of all instruments are integrated into the controller, which is convenient for centralized control of the opening and closing of the lighting, microscope camera, heater, laser and spectrometer, as well as the movement of the XY plane motion mechanism; it is easy to operate.

[0017] Furthermore, the XY plane motion mechanism includes a vertical ball screw and a horizontal ball screw, both of which are electric ball screws, the fixed end of the vertical ball screw is connected to the mounting plate, the movable end of the vertical ball screw is connected to the fixed end of the horizontal ball screw, and the movable end of the horizontal ball screw is connected to the substrate.

[0018] Furthermore, a power supply is also provided on the mounting plate, and the lighting lamp, microscope camera, XY plane motion mechanism, heater, laser, spectrometer and controller are respectively connected to the power supply.

[0019] It is convenient to supply power to all electrical instruments, improve field work capabilities, and has good portability.

[0020] Furthermore, a magnetic air confinement cover is provided below the transmission mirror.

[0021] When the laser is turned on, energy loss on the substrate is avoided, and the amount and intensity of the generated plasma are increased; when the spectrometer detects the sample, the relatively closed structure of the magnetic confinement cover confines the plasma within a certain spatial range, increasing the density of the plasma, enhancing the intensity of the spectral signal, and improving the accuracy of the detection.

[0022] Furthermore, an instrument storage box is also provided on the mounting plate.

[0023] It is easy to realize the planar motion of X-axis and Y-axis; through the electric ball screw, it is easy to control and easy to operate.

[0024] Furthermore, the substrate is a zinc plate.

[0025] By using a zinc plate, the plasma intensity can be enhanced, thereby enhancing the signal of the spectrometer and improving the accuracy of detection.

[0026] Furthermore, a box cover is provided on the mounting plate, and the mounting plate and the box cover form a box structure. The mounting plate is L-shaped and forms a bottom plate and a side plate of the box structure. A shoulder strap is provided on one side of the mounting plate located outside the box structure; the XY plane motion mechanism, substrate, heater, laser, reflector, transmission mirror and spectrometer are all located in the box structure.

[0027] All instruments are placed in the box structure to protect the instruments; shoulder straps make it easy for people to carry the instruments and move around, thus improving portability.

[0028] Furthermore, the box cover is provided with a box door, the box door is provided with an observation window and a handle, and the observation window faces the substrate; the box cover is also provided with a display screen, and the display screen is connected to the spectrometer signal.

[0029] Opening the box door makes it easy to drip samples on the substrate. The focusing of the laser on the substrate and the drying of the sample can be observed through the observation window, which is easy to operate. The display screen can display the spectral data of the spectrometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model.

[0031] Figure 2 It is a schematic diagram of the internal structure of the utility model.

[0032] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0033] 1-mounting plate; 2-vertical ball screw; 3-horizontal ball screw; 4-base plate; 5-heater; 6-laser; 7-reflector; 8-transmission mirror; 9-spectrometer; 10-microscope camera; 11-illuminator; 12-controller; 13-power supply; 14-magnetic air restraint cover; 15-instrument storage box; 16-box cover; 17-shoulder strap; 18-box door; 19-observation window; 20-handle; 21-display screen; 22-laser switch; 23-main power switch. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] This utility model refers to Figure 1-2 .

[0036] The utility model provides a portable water body nutrient element analysis device, comprising a mounting plate 1, wherein the mounting plate 1 is provided with an XY plane motion mechanism, a heater 5, a laser 6, a reflector 7, a transmission mirror 8 and a spectrometer 9, wherein a substrate 4 is provided on the XY plane motion mechanism, wherein the heater 5 is located below the substrate 4; wherein the reflector 7 is located above the transmission mirror 8, wherein the transmission mirror 8 is located above the substrate 4, wherein the laser 6 is directly opposite to the reflector 7, wherein the laser energy of the laser 6 is sequentially focused on the substrate 4 through the reflector 7 and the transmission mirror 8; wherein the probe of the spectrometer 9 is located below the transmission mirror 8.

[0037] principle:

[0038] By centrally arranging the laser 6, spectrometer 9 and other equipment on the mounting plate 1, the laser 6 and the spectrometer 9 can be carried to the water body site as a whole along with the mounting plate 1, which is convenient to use. When in use, first operate the XY plane motion mechanism to move, drive the substrate 4 to move out, and avoid being blocked by the transmission mirror 8; after the staff collects the sample and drips it onto the substrate 4, the substrate 4 is moved to the top of the heater 5; after the heater 5 dries the sample on the substrate 4, the sample should be measured in time to prevent the sample temperature from dissipating. When measuring, turn on the laser 6, operate the XY plane motion mechanism to fine-tune the position of the substrate 4 up and down, so that the substrate 4 is at the focus of the transmission mirror 8, and the laser of the laser 6 is focused on the sample on the substrate 4; and turn on the spectrometer 9 to collect the spectrum. When the spectrum emitted by the sample excited by the laser is scattered to the range below the transmission mirror 8, it is captured by the probe of the spectrometer 9.

[0039] Note: The optical fiber probe of the spectrometer 9 is integrated in the transmission mirror 8, which is the existing technology of the LIBS instrument. The reflector 7 is at a 45° angle with the horizontal laser of the laser 6, and can reflect the laser downward. Preferably, a lens barrel is provided between the reflector 7 and the transmission mirror 8; a lens barrel is provided on the lower side of the transmission mirror 8; and the emission end of the laser 6 is connected to the housing of the reflector 7.

[0040] The utility model has a small size and can be carried as a whole with the mounting plate 1, realizing online in-situ real-time detection; the position of the substrate 4 is adjusted by the XY plane motion mechanism, the sample is convenient to drip, and the use is convenient, and the laser is focused on the substrate 4 to ensure reliable excitation of the sample; the sample is dried by the heater 5, and the temperature of the substrate 4 is increased at the same time, which is convenient for plasma emission and improves the detection sensitivity.

[0041] Further, such as Figure 2 As shown: a microscope camera 10 is also arranged above the reflector 7, and the microscope camera 10 is fixed on the mounting plate 1; the reflector 7 is a semi-reflector 7 and can transmit light from bottom to top.

[0042] Preferably, the microscope camera 10 is a CCD camera.

[0043] The image information on the substrate 4 is collected by the microscope camera 10, so as to assist in controlling the focusing of the laser on the substrate 4 and improve the detection accuracy.

[0044] Furthermore, the mounting plate 1 is provided with an illumination lamp 11 , which can illuminate the substrate 4 .

[0045] Preferably, the emitting head of the illuminating lamp 11 can be integrated into the housing of the reflector 7 and arranged downward, or can be arranged above the substrate 4 .

[0046] When the substrate 4 is focused, the substrate 4 can be illuminated, the image clarity of the microscope camera 10 is improved, and the focusing operation is convenient.

[0047] Furthermore, a controller 12 is also provided on the mounting plate 1, and the lighting lamp 11, the microscope camera 10, the XY plane motion mechanism, the heater 5, the laser 6 and the spectrometer 9 are respectively connected to the controller 12 through signals.

[0048] Note: The controller 12 can be the controller 12 in the LIBS instrument of the prior art. In addition, the controller 12 only needs to control the opening and closing of the lighting lamp 11, the microscope camera 10, the heater 5, the laser 6 and the spectrometer 9, and the motor of the XY plane motion mechanism, which is equivalent to integrating multiple switches, and can be implemented by using an STM32 single chip microcomputer through existing conventional programming.

[0049] The control switches of all instruments are integrated into the controller 12, so as to centrally control the opening and closing of the lighting lamp 11, the microscope camera 10, the heater 5, the laser 6 and the spectrometer 9, and control the movement of the XY plane motion mechanism; the operation is convenient.

[0050] Furthermore, the XY plane motion mechanism includes a vertical ball screw 2 and a horizontal ball screw 3, both of which are electric ball screws, the fixed end of the vertical ball screw 2 is connected to the mounting plate 1, the movable end of the vertical ball screw 2 is connected to the fixed end of the horizontal ball screw 3, and the movable end of the horizontal ball screw 3 is connected to the substrate 4.

[0051] Note: The electric ball screw is an existing technology, which generally has a slide, a slider, and a screw. The slide is the fixed end of the ball screw, and the two ends of the screw are rotatably connected to the slide. The slide is provided with a motor, and the motor is connected to the screw. The slider is the moving end of the ball screw, and the screw passes through the slider, and the slider is slidably connected to the slide. The motor of the electric ball screw can be controlled by a controller 12.

[0052] Furthermore, a power supply 13 is also provided on the mounting plate 1 , and the lighting lamp 11 , the microscope camera 10 , the XY plane motion mechanism, the heater 5 , the laser 6 , the spectrometer 9 and the controller 12 are respectively connected to the power supply 13 .

[0053] Note: The power source 13 may be a battery.

[0054] It is convenient to supply power to all electrical instruments, improve field work capabilities, and has good portability.

[0055] Furthermore, a magnetic air confinement cover 14 is provided below the transmission mirror 8 .

[0056] Note: The magnetic air confinement cover 14 is a container cover body made of magnets and having a hollow truncated cone space structure.

[0057] When the laser 6 is turned on, the energy dissipation on the substrate 4 is avoided, and the amount and intensity of the generated plasma are enhanced; when the spectrometer 9 detects the sample, the plasma is confined within a certain spatial range through the relatively closed structure of the magnetic air confinement cover 14, thereby increasing the density of the plasma, enhancing the intensity of the spectral signal, and improving the accuracy of the detection.

[0058] Furthermore, an instrument storage box 15 is also provided on the mounting plate 1 .

[0059] Preferably, the instrument storage box 15 is a drawer structure. The instrument storage box 15 can be used to store experimental tools such as samplers and droppers, which is convenient for collecting samples and improves the flexibility and portability of the device.

[0060] It is easy to realize the planar motion of X-axis and Y-axis; through the electric ball screw, it is easy to control and easy to operate.

[0061] Furthermore, the substrate 4 is a zinc plate.

[0062] By using a zinc plate, the plasma intensity can be enhanced, thereby enhancing the signal of the spectrometer and improving the accuracy of detection.

[0063] Further, such as Figure 1 As shown: the mounting plate 1 is also provided with a box cover 16, the mounting plate 1 and the box cover 16 form a box structure, the mounting plate 1 is L-shaped and forms the bottom plate and one side plate of the box structure, and a shoulder strap 17 is provided on one side of the mounting plate 1 located outside the box structure; the XY plane motion mechanism, substrate 4, heater 5, laser 6, reflector 7, transmission mirror 8 and spectrometer 9 are all located in the box structure.

[0064] All instruments are placed in the box structure to protect the instruments; the shoulder strap 17 makes it easy for people to carry the instruments and move around, thereby improving portability.

[0065] Furthermore, the box cover 16 is provided with a box door 18 , and the box door 18 is provided with an observation window 19 and a handle 20 , and the observation window 19 faces the substrate 4 ; the box cover 16 is also provided with a display screen 21 , and the display screen 21 is connected to the spectrometer 9 signal.

[0066] Preferably, the display screen 21 is connected to the power supply 13, so as to provide power to the display screen 21. The display screen 21 is connected to the controller 12 by signal, so as to control the opening and closing of the display screen 21. The box cover 16 is also provided with a laser switch 22 and a main power switch 23, the laser switch 22 is electrically connected to the laser 6, and the main power switch 23 is electrically connected to the power supply 13.

[0067] Opening the box door 18 makes it easy to drip samples on the substrate 4. The focusing condition of the laser on the substrate 4 and the drying condition of the sample can be observed through the observation window 19, which is easy to operate. The display screen 21 can display the spectral data of the spectrometer 9.

[0068] In the present utility model, if the terms describing the relative functional relationship of the structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be a fixed connection, a detachable connection, or an integrated one; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements; "fix" can be an integrated fixation or a detachable fixation through fasteners; can be a direct fixation or a fixation through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present utility model can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0069] In the present invention, if there are descriptive terms with subsidiary or connecting meanings, for example, a first feature is "on" or "below" a second feature, unless otherwise clearly specified and limited, it should not be understood in a restrictive manner. For example, "on" or "below" may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0070] Furthermore, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 utility model. 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 a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of the different embodiments and examples described in this specification without contradiction, and these combinations or combinations shall all fall within the scope summarized by the utility model.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. A person skilled in the art can change, modify, replace and modify the above embodiments within the scope of information available from public channels and in combination with the technical inspiration provided by the present application documents.

Claims

1. A portable water nutrient element analysis device, characterized in that: The invention comprises a mounting plate (1), wherein an XY plane motion mechanism, a heater (5), a laser (6), a reflector (7), a transmission mirror (8) and a spectrometer (9) are arranged on the mounting plate (1); a substrate (4) is arranged on the XY plane motion mechanism; the heater (5) is located below the substrate (4); the reflector (7) is located above the transmission mirror (8); the transmission mirror (8) is located above the substrate (4); the laser (6) faces the reflector (7); laser energy of the laser (6) is focused onto the substrate (4) through the reflector (7) and the transmission mirror (8) in sequence; and a probe of the spectrometer (9) is located below the transmission mirror (8).

2. The portable water nutrient element analysis device according to claim 1, characterized in that: A microscope camera (10) is also provided above the reflector (7), and the microscope camera (10) is fixed on the mounting plate (1); the reflector (7) is a semi-reflector (7) and can transmit light from bottom to top.

3. The portable water nutrient element analysis device according to claim 2, characterized in that: The mounting plate (1) is also provided with an illumination lamp (11), and the illumination lamp (11) is capable of illuminating the substrate (4).

4. The portable water nutrient element analysis device according to claim 3 is characterized in that: The mounting plate (1) is also provided with a controller (12), and the lighting lamp (11), the microscope camera (10), the XY plane motion mechanism, the heater (5), the laser (6) and the spectrometer (9) are respectively connected to the controller (12) via signals.

5. The portable water nutrient element analysis device according to claim 4, characterized in that: The XY plane motion mechanism comprises a vertical ball screw (2) and a horizontal ball screw (3), both of which are electric ball screws, the fixed end of the vertical ball screw (2) is connected to the mounting plate (1), the movable end of the vertical ball screw (2) is connected to the fixed end of the horizontal ball screw (3), and the movable end of the horizontal ball screw (3) is connected to the base plate (4).

6. The portable water nutrient element analysis device according to claim 5, characterized in that: The mounting plate (1) is also provided with a power supply (13), and the lighting lamp (11), the microscope camera (10), the XY plane motion mechanism, the heater (5), the laser (6), the spectrometer (9) and the controller (12) are respectively connected to the power supply (13).

7. The portable water nutrient element analysis device according to claim 1, characterized in that: A magnetic air restraint cover (14) is also provided below the transmission mirror (8); and an instrument storage box (15) is also provided on the mounting plate (1).

8. The portable water nutrient element analysis device according to claim 1, characterized in that: Furthermore, the substrate (4) is a zinc plate.

9. The portable water nutrient element analysis device according to claim 1, characterized in that: The mounting plate (1) is also provided with a box cover (16), and the mounting plate (1) and the box cover (16) form a box structure. The mounting plate (1) is L-shaped and forms a bottom plate and a side plate of the box structure. A shoulder strap (17) is provided on one side of the mounting plate (1) located outside the box structure. The XY plane motion mechanism, the base plate (4), the heater (5), the laser (6), the reflector (7), the transmission mirror (8) and the spectrometer (9) are all located inside the box structure.

10. The portable water nutrient element analysis device according to claim 9, characterized in that: The box cover (16) is also provided with a box door (18), and the box door (18) is provided with an observation window (19) and a handle (20), and the observation window (19) faces the substrate (4); the box cover (16) is also provided with a display screen (21), and the display screen (21) is connected to the spectrometer (9) by signal.

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