Mineral substance detection device based on laser-induced breakdown spectroscopy

Abstract

The utility model discloses a mineral substance detection device based on laser-induced breakdown spectroscopy, which relates to the technical field of mineral substance detection, and comprises a detection box body and an end surface cleaning mechanism, the end face cleaning mechanism comprises a cleaning shaft rotationally arranged in one end of the detection box body, a first cleaning rod and a second cleaning rod, and one end of the cleaning shaft is in transmission connection with a motor through a gear set; the liquid spraying mechanism comprises a liquid storage box arranged in one end of the detection box body, and the bottom of the liquid storage box is connected with a liquid conveying pipe and a liquid spraying pipe through a water pump, so that the detection area between the optical fiber probe and the lens is uniformly full of detection water mist. By arranging the end face cleaning mechanism, the optical fiber probe and the outer portion of the lens can be wiped and cleaned, the situation that single-time detection liquid covers the surface of the optical fiber probe and the outer portion of the lens to affect continuous detection efficiency and precision is prevented, cleaning efficiency is high, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of mineral detection, and particularly relates to a mineral detection device based on laser-induced breakdown spectroscopy. Background Technique

[0002] Mineral detection refers to the detection of trace elements in substances, which is one of the important means for people to understand the composition and properties of substances. There are many methods for mineral detection, and the most common one is to analyze through instruments. This article will introduce the methods, applications, and importance of mineral detection. There are many methods for mineral detection, and the more commonly used ones include spectral analysis, atomic absorption spectrometry, atomic fluorescence spectrometry, etc. Mineral detection has a wide range of applications in various fields. For example, in the medical field, by detecting trace elements in the human body, the nutritional status and health status of the human body can be understood. In the environmental field, by detecting trace elements in air, water, and soil, the quality and pollution degree of the environment can be understood. In the agricultural field, by detecting trace elements in the soil, the quality of the soil and the growth of crops can be understood. In addition, mineral detection is also widely used in fields such as geology, materials science, and food science.

[0003] In the prior art, a method for detecting mineral elements in liquid milk based on laser-induced breakdown spectroscopy with the application number 202010592261.2 detects liquid milk containing mineral elements with different concentration gradients. After preprocessing the spectral data using a normalization algorithm, a calibration model is established by combining high-density discrete wavelet transform, competitive adaptive reweighted sampling algorithm, and partial least squares method to obtain a prediction model for mineral elements in liquid milk.

[0004] However, in actual operation, the detection water mist sprayed once is easily adhered to the outside of the optical fiber probe and the lens, thereby affecting the efficiency and accuracy of continuous detection. Manual cleaning is time-consuming and laborious, and the operation is inconvenient. Content of the Utility Model

[0005] The utility model provides a mineral detection device based on laser-induced breakdown spectroscopy, which wipes and cleans the detection end faces outside the optical fiber probe and the lens, preventing the detection liquid sprayed once from covering its surface and affecting the efficiency and accuracy of continuous detection, so as to solve the problem that the detection water mist sprayed once is easily adhered to the outside of the optical fiber probe and the lens, thereby affecting the efficiency and accuracy of continuous detection, and the cleaning is inconvenient.

[0006] In order to achieve the advantages of wiping and cleaning the detection end faces outside the optical fiber probe and the lens, and preventing the single detection liquid from covering the surface and affecting the efficiency and accuracy of continuous detection, the utility model provides the following technical solutions: a mineral detection device based on laser induced breakdown spectroscopy, comprising a detection box, and a pulse laser and a spectrometer arranged outside the detection box, an end face cleaning mechanism, the end face cleaning mechanism comprising a cleaning shaft inside one end of the detection box that is vertically rotated by a bearing, a first cleaning rod and a second cleaning rod are respectively arranged at one end of the cleaning shaft, the upper surface of the first cleaning rod is arranged parallel to and close to the lens at one end of the pulse laser, the lower surface of the second cleaning rod is arranged parallel to and close to the upper surface of the optical fiber probe at one end of the spectrometer, and one end of the cleaning shaft is connected to a motor through a gear set transmission; a liquid spraying mechanism, the liquid spraying mechanism comprising a liquid storage tank arranged inside one end of the detection box, the bottom of the liquid storage tank is connected to an infusion tube through a water pump, one end of the infusion tube is provided with a liquid spraying tube, and the inner wall of the liquid spraying tube is provided with a plurality of atomizing nozzles, so that the detection area between the optical fiber probe and the lens is evenly covered with detection water mist.

[0007] As a preferred technical solution of the utility model, the pulse laser is arranged in parallel on the top of the detection box through an upper support, and a reflector is arranged on the top of the upper support;

[0008] As a preferred technical solution of the utility model, the angles between the reflector, one end face of the pulse laser and the upper surface of the lens are all 45°.

[0009] As a preferred technical solution of the utility model, a grille is provided in the lower part of the detection box body, and the liquid storage tank is fixedly arranged on the upper side of one end of the grille, and a drain port and a valve are provided on one side of the bottom of the detection box body.

[0010] As a preferred technical solution of the utility model, a drainage plate is further provided at the bottom of the detection box, and the drainage plate is a triangular plate.

[0011] As a preferred technical solution of the utility model, an upper wiping layer is provided on the upper side of the first cleaning rod, and an upper wiping layer is provided on the lower side of the second cleaning rod.

[0012] As a preferred technical solution of the utility model, a controller is also provided on the upper part of the spectrometer, and the control ends of the pulse laser, the spectrometer, the motor and the water pump are all electrically connected to the controller.

[0013] As a preferred technical solution of the utility model, an inspection cover is hingedly connected to the upper side of one end of the detection box body close to the liquid storage tank through a hinge, and a perspective window is provided on the outer wall of the detection chamber of the detection box body.

[0014] As a preferred technical solution of the utility model, the gear set and the motor are arranged on the upper part of one end of the detection box through a hood, and the side wall of the hood close to the motor is provided with heat dissipation holes.

[0015] As a preferred technical solution of the utility model, the liquid spray pipe is an annular pipe, and a plurality of atomizing nozzles are distributed at equal angles on the inner wall of the liquid spray pipe, and the inner diameter of the liquid spray pipe is larger than the outer diameter of the lens.

[0016] Compared with the prior art, the utility model provides a mineral detection device based on laser induced breakdown spectroscopy, which has the following beneficial effects:

[0017] 1. The mineral detection device based on laser induced breakdown spectroscopy is provided with an end face cleaning mechanism. The end face cleaning mechanism vertically rotates a cleaning shaft, a first cleaning rod and a second cleaning rod inside one end of a detection box through a bearing. The upper surface of the first cleaning rod is parallel to and closely attached to a lens at one end of a pulsed laser. The lower surface of the second cleaning rod is parallel to and closely attached to an upper surface of an optical fiber probe at one end of a spectrometer. One end of the cleaning shaft is connected to a motor through a gear set transmission. The cleaning shaft is driven to rotate and adjust by the motor and the gear set, and the wiping layers on one side of the first cleaning rod and the second cleaning rod can be driven to rotate horizontally, so as to wipe and clean the detection end face of the optical fiber probe and the outside of the lens, so as to prevent a single detection liquid from covering its surface and affecting the efficiency and accuracy of continuous detection. In addition, the cleaning efficiency is high, and the operation is convenient and quick.

[0018] 2. The mineral detection device based on laser induced breakdown spectroscopy is provided with a liquid spraying mechanism, which includes a liquid storage tank arranged inside one end of the detection box body, the bottom of the liquid storage tank is connected with a liquid infusion tube through a water pump, a liquid spraying tube is provided at one end of the liquid infusion tube, and a plurality of atomizing nozzles are provided on the inner wall of the liquid spraying tube, so that the mineral liquid in the liquid storage tank can be transported to the plurality of atomizing nozzles for horizontal spraying through the water pump, the liquid infusion tube and the liquid spraying tube, so that the detection area between the optical fiber probe and the lens is evenly covered with detection water mist, which is beneficial to improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the detection box of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the liquid spraying mechanism of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the cleaning shaft and the cleaning rod of the utility model.

[0023] In the figure: 1, detection box body; 2, grille; 3, upper support; 4, pulsed laser; 5, spectrometer; 6, controller; 7, hinge; 8, maintenance cover; 9, perspective window; 10, liquid discharge port; 11, liquid storage tank; 12, infusion tube; 13, atomizing nozzle; 14, optical fiber probe; 15, cleaning shaft; 16, reflector; 17, gear set; 18, motor; 19, first cleaning rod; 20, second cleaning rod; 21, lower wiping layer; 22, liquid discharge plate; 23, upper wiping layer; 24, lens; 25, water pump; 26, liquid spraying tube; 27, machine cover. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 4The utility model discloses a mineral detection device based on laser induced breakdown spectroscopy, comprising a detection box 1, and a pulse laser 4 and a spectrometer 5 arranged outside the detection box 1, a controller 6 is also arranged on the upper part of the spectrometer 5, and the control ends of the pulse laser 4, the spectrometer 5, the motor 18 and the water pump 25 are all electrically connected to the controller 6, so as to facilitate overall control; an end surface cleaning mechanism is arranged, the end surface cleaning mechanism comprises a cleaning shaft 15 which is rotated vertically inside one end of the detection box 1 through a bearing, a first cleaning rod 19 and a second cleaning rod 20 are arranged at one end of the cleaning shaft 15, the upper surface of the first cleaning rod 19 is arranged parallel to and closely attached to the lens 24 at one end of the pulse laser 4, and the lower surface of the second cleaning rod 20 is arranged parallel to and closely attached to the upper surface of the optical fiber probe 14 at one end of the spectrometer 5, one end of the cleaning shaft 15 is connected to the motor 18 through a gear set 17, the gear set 17 and the motor 18 are arranged at the upper part of one end of the detection box 1 through a machine cover 27, and the machine cover 27 is close to the motor The side wall of 18 is provided with heat dissipation holes, so that the cleaning shaft 15 can be driven to rotate and adjust by the motor 18 and the gear set 17, and the wiping layer on one side of the first cleaning rod 19 and the second cleaning rod 20 can be driven to rotate horizontally, so as to wipe and clean the detection end faces outside the optical fiber probe 14 and the lens 24, so as to prevent the single detection liquid from covering its surface and affecting the efficiency and accuracy of continuous detection, and the cleaning efficiency is high, and the operation is convenient and fast; the liquid spraying mechanism, the liquid spraying mechanism includes a liquid storage tank 11 arranged inside one end of the detection box body 1, the bottom of the liquid storage tank 11 is connected to the infusion tube 12 through the water pump 25, the one end of the infusion tube 12 is provided with a liquid spraying tube 26, and the inner wall of the liquid spraying tube 26 is provided with a plurality of atomizing nozzles 13, and the mineral liquid in the liquid storage tank 11 can be transported to the plurality of atomizing nozzles 13 through the water pump 25, the infusion tube 12 and the liquid spraying tube 26 to spray horizontally, so that the detection area between the optical fiber probe 14 and the lens 24 is evenly covered with detection water mist, which is conducive to improving the detection efficiency.

[0026] Combination Figure 1 and Figure 2 As shown, in order to transmit the pulse laser emitted by the pulse laser 4 to the inside of the detection box 1, the pulse laser 4 is also arranged in parallel on the top of the detection box 1 through the upper support 3, and a reflector 16 is provided on the top of the upper support 3 to reflect and redirect the pulse laser;

[0027] In addition, the included angles between the reflector 16, one end face of the pulse laser 4 and the upper surface of the lens 24 are all 45°, and the lens 24 is set as a focusing lens, which can allow the laser light emitted by the pulse laser 4 to enter the detection box 1 through a 90° angle.

[0028] Combination Figure 2As shown, in order to facilitate the discharge of the detected atomized liquid from the box body, a grille 2 is further provided at the lower part inside the detection box body 1, and the liquid storage tank 11 is fixedly arranged on the upper side of one end of the grille 2. A liquid discharge port 10 and a valve are provided on one side of the bottom of the detection box body 1. A liquid discharge plate 22 is further provided on the bottom inside the detection box body 1, and the liquid discharge plate 22 is a triangular prism plate. The ejected liquid passes through the grille 2 and is guided by the liquid discharge plate 22, and finally is discharged from the liquid discharge port 10.

[0029] Combined with Figure 2 and Figure 4 As shown, in order to improve the wiping and cleaning effect, an upper wiping layer 23 is further provided on the upper side of the first cleaning rod 19, and a lower wiping layer 21 is provided on the lower side of the second cleaning rod 20, so that the wiping layer has excellent water absorption effect, and at the same time forms a flexible wiping to prevent scratching the outer wall of the detection end face.

[0030] In this implementation scheme, since a maintenance cover 8 is hinged on the upper side of one end of the detection box body 1 close to the liquid storage tank 11 through a hinge 7, it is convenient to perform maintenance and cleaning on the inside of the detection box body 1. A perspective window 9 is provided on the outer wall of the detection room of the detection box body 1, which is convenient to penetrate the detection status inside the detection room.

[0031] Combined with Figure 2 and Figure 3 As shown, in order to realize multi-angle spraying of water mist, the liquid spraying pipe 26 is also an annular pipe, and a plurality of atomizing nozzles 13 are equally angularly distributed on the inner wall of the liquid spraying pipe 26, and can perform multi-angle spraying of the detection liquid.

[0032] In addition, in this implementation scheme, since the inner diameter of the liquid spraying pipe 26 provided is larger than the outer diameter of the lens 24, the atomized detection area can be completely filled in the detection area between the optical fiber probe 14 and the lens 24, which is beneficial to improving the detection accuracy.

[0033] The working principle and usage process of the present utility model: When in use, open the maintenance cover 8, pour the liquid to be detected into the liquid storage tank 11, and through the water pump 25, the liquid delivery pipe 12 and the liquid spraying pipe 26, the mineral liquid in the liquid storage tank 11 can be transported to a plurality of atomizing nozzles 13 for horizontal spraying. The pulsed laser 4 emits a laser beam, which is reflected by a reflecting mirror and focused by a short-focus lens and then converges on the sample surface, thereby inducing the generation of a high-temperature and high-density plasma. The plasma signal is collected by the optical fiber probe 14 and transmitted to the spectrometer 5 through the optical fiber, so as to record the characteristic spectral lines corresponding to the liquid mineral elements in the atomic emission spectrum, and complete a single detection, so that the detection efficiency is high and the operation is convenient and fast. When continuous multiple detections need to be performed, after cleaning the detection end face on one side of the optical fiber probe 14 and the lens 24 through the end face cleaning mechanism, repeat the above operation again.

[0034] In summary, by providing an end face cleaning mechanism, the utility model enables the rotation adjustment of the cleaning shaft 15 to be driven by the motor 18 and the gear set 17 of the end face cleaning mechanism, and can drive the wiping layers on one side of the first cleaning rod 19 and the second cleaning rod 20 to rotate horizontally, thereby wiping and cleaning the detection end faces outside the optical fiber probe 14 and the lens 24, preventing the surface from being covered by the detection liquid during a single detection, which affects the efficiency and accuracy of continuous detection. Moreover, the cleaning efficiency is relatively high, and the operation is convenient and fast.

[0035] It should be noted that in this text, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0036] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A mineral detection device based on laser induced breakdown spectroscopy, comprising a detection box (1), and a pulsed laser (4) and a spectrometer (5) arranged outside the detection box (1), characterized in that: An end surface cleaning mechanism, the end surface cleaning mechanism comprising a cleaning shaft (15) inside one end of a vertically rotating detection box (1) through a bearing, a first cleaning rod (19) and a second cleaning rod (20) are respectively arranged at one end of the cleaning shaft (15), the upper surface of the first cleaning rod (19) is arranged parallel to and closely attached to a lens (24) at one end of a pulse laser (4), and the lower surface of the second cleaning rod (20) is arranged parallel to and closely attached to an upper surface of a fiber optic probe (14) at one end of a spectrometer (5), and one end of the cleaning shaft (15) is connected to a motor (18) through a gear set (17); A liquid spraying mechanism, the liquid spraying mechanism comprising a liquid storage tank (11) arranged inside one end of a detection box body (1), the bottom of the liquid storage tank (11) being connected to a liquid infusion tube (12) via a water pump (25), a liquid spraying tube (26) being provided at one end of the liquid infusion tube (12), and a plurality of atomizing nozzles (13) being provided on the inner wall of the liquid spraying tube (26), so that a detection area between the optical fiber probe (14) and the lens (24) is evenly covered with detection water mist.

2. The mineral detection device based on laser induced breakdown spectroscopy according to claim 1, characterized in that: The pulse laser (4) is arranged in parallel on the top of the detection box (1) through an upper support (3), and a reflector (16) is provided on the top of the upper support (3); The included angles between the reflector (16), one end surface of the pulse laser (4) and the upper surface of the lens (24) are all 45 degrees.

3. The mineral detection device based on laser induced breakdown spectroscopy according to claim 2, characterized in that: A grille (2) is provided at the lower inner portion of the detection box (1), and a liquid storage tank (11) is fixedly arranged on the upper side of one end of the grille (2). A liquid discharge port (10) and a valve are provided at one side of the bottom of the detection box (1).

4. The mineral detection device based on laser induced breakdown spectroscopy according to claim 3, characterized in that: The bottom of the detection box (1) is also provided with a liquid drainage plate (22), and the liquid drainage plate (22) is a triangular plate.

5. The mineral detection device based on laser induced breakdown spectroscopy according to claim 1, characterized in that: An upper wiping layer (23) is provided on the upper side of the first cleaning rod (19), and a lower wiping layer (21) is provided on the lower side of the second cleaning rod (20).

6. The mineral detection device based on laser induced breakdown spectroscopy according to claim 1, characterized in that: A controller (6) is also provided on the upper part of the spectrometer (5), and the control ends of the pulse laser (4), the spectrometer (5), the motor (18) and the water pump (25) are all electrically connected to the controller (6).

7. The mineral detection device based on laser induced breakdown spectroscopy according to claim 3, characterized in that: An inspection cover (8) is hingedly connected to the upper side of one end of the detection box (1) close to the liquid storage tank (11) via a hinge (7), and a perspective window (9) is provided on the outer wall of the detection chamber of the detection box (1).

8. The mineral detection device based on laser induced breakdown spectroscopy according to claim 1, characterized in that: The gear set (17) and the motor (18) are covered by a cover (27) on the upper part of one end of the detection box (1); a heat dissipation hole is provided on the side wall of the cover (27) close to the motor (18).

9. The mineral detection device based on laser induced breakdown spectroscopy according to claim 1, characterized in that: The liquid spray pipe (26) is an annular pipe, and a plurality of atomizing nozzles (13) are distributed at equal angles on the inner wall of the liquid spray pipe (26). The inner diameter of the liquid spray pipe (26) is greater than the outer diameter of the lens (24).

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