CN210322800U - Sample detection box for laser-induced breakdown spectroscopy - Google Patents
Sample detection box for laser-induced breakdown spectroscopy Download PDFInfo
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- CN210322800U CN210322800U CN201921239429.0U CN201921239429U CN210322800U CN 210322800 U CN210322800 U CN 210322800U CN 201921239429 U CN201921239429 U CN 201921239429U CN 210322800 U CN210322800 U CN 210322800U
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Abstract
The utility model relates to a sample detection box for laser-induced breakdown spectroscopy; the detection box comprises a sealed box body, a three-dimensional displacement platform, a spectrometer, a dust remover and a controller, wherein the three-dimensional displacement platform is fixedly installed on the inner bottom surface of the box body; the output optical fiber of the optical collector is connected with the spectrometer, the signal output ports of the spectrometer, the laser displacement sensor and the particulate matter concentration sensor are connected with the controller, the air outlet and the air inlet of the dust remover are communicated with the interior of the box body, and the controller controls the three-dimensional displacement platform and the dust remover to work; the utility model discloses can effectively prevent the influence of the particle that the previous arouses the production when LIBS analysis to the analysis of the back time, still protect environment and operating personnel's is healthy.
Description
The technical field is as follows:
the utility model relates to a composition check out test set, in particular to sample detection case for laser-induced breakdown spectroscopy.
(II) background art:
laser Induced Breakdown Spectroscopy (LIBS) is an atomic emission Spectroscopy technology, which uses high-intensity pulsed Laser to ablate a sample to generate plasma, and collects and analyzes the plasma emission spectrum by a spectrometer to obtain the type and content of elements in the sample. The LIBS technology has the advantages of rapid detection, less or no sample preparation, low sample loss, online in-situ detection and the like, and is increasingly and widely applied to various fields such as biomedicine, metallurgy, environmental monitoring, cultural relic analysis and identification, space exploration, energy development and the like.
When LIBS analysis is carried out, a sample substance is ablated by laser to form plasma, formed substance particles are suspended in ambient gas after the plasma is annihilated, and when the plasma is excited again by the laser, the particles generated by the previous excitation are also excited to interfere with a spectrum and also interfere with laser transmission. In addition, the particles are suspended in the air to pollute the air and harm experimenters.
(III) content of the utility model:
the to-be-solved technical problem of the utility model is: the sample detection box for the laser-induced breakdown spectroscopy analysis can effectively prevent the influence of particles generated by previous excitation on subsequent analysis during LIBS analysis, also protects the environment and the physical health of operators, and has strong use function.
The technical scheme of the utility model:
a sample detection box for laser-induced breakdown spectroscopy comprises a sealed box body, a three-dimensional displacement platform, a focusing lens, an optical collector, a laser displacement sensor, a particulate matter concentration sensor, a spectrometer, a dust remover and a controller, wherein the spectrometer, the dust remover and the controller are all arranged outside the box body; the three-dimensional displacement platform is fixedly arranged in the middle of the inner bottom surface of the box body, a laser incidence window is arranged in the middle of a top plate of the box body, a transparent plate is arranged on the laser incidence window, a lens mounting frame, an optical collector mounting frame and a laser displacement sensor mounting frame are fixedly arranged on the inner wall of the box body, the focusing lens, the optical collector and the laser displacement sensor are respectively arranged on the lens mounting frame, the optical collector mounting frame and the laser displacement sensor mounting frame, and the particulate matter concentration sensor is fixedly arranged on the inner wall of the box body; when the horizontal table top of the three-dimensional displacement platform moves to the middle position, the horizontal table top is just positioned under the laser incidence window, the focusing lens is positioned between the laser incidence window and the horizontal table top of the three-dimensional displacement platform, the focusing lens is positioned under the laser incidence window, the height is adjustable, the light collector and the laser displacement sensor are positioned above the side of the horizontal table top of the three-dimensional displacement platform, the light collection port of the light collector faces the middle part of the horizontal table top of the three-dimensional displacement platform, the focus of the objective lens of the light collector is positioned on the laser transmission axis of the light collector, and the laser emission surface of the laser displacement sensor is right opposite to the horizontal table top of the three-dimensional displacement platform; the output optical fiber of the optical collector is connected with the optical fiber input port of the spectrometer, the signal output port of the spectrometer is connected with the spectral signal input port of the controller, the signal output port of the laser displacement sensor and the signal output port of the particulate matter concentration sensor are respectively connected with the sample surface position monitoring signal input port and the particulate matter concentration input port of the controller through data cables, and the platform control port of the controller is connected with the three-dimensional displacement platform through the displacement platform controller; the air outlet and the air inlet of the dust remover are respectively communicated with the interior of the box body through an air outlet pipeline and an air inlet pipeline, the air outlet pipeline is communicated with the air inlet of the box body, the air inlet pipeline is communicated with the air outlet of the box body, and a control signal input port of the dust remover is connected with a dust removal control signal output port of the controller.
When the laser-induced breakdown spectroscopy is carried out, a laser is needed, the laser is positioned right above or laterally above a laser incidence window, laser emitted by the laser vertically enters the laser incidence window, and a laser emission signal control port of the controller is connected with the laser.
When the laser is positioned right above the laser incidence window, the laser emitted by the laser is directly vertically emitted from the laser incidence window; when the laser is positioned above the side of the laser incidence window, laser emitted by the laser is firstly emitted horizontally, and then is reflected by the reflector and then is vertically emitted from the laser incidence window.
The box body is used for providing a stable and analysis environment set according to requirements; the horizontal table surface of the three-dimensional displacement platform is used for bearing and moving a sample, so that analysis is facilitated; the laser displacement sensor is used for ensuring that the upper surface of a sample is positioned at a set height by measuring the distance between the laser displacement sensor and the upper surface of the sample positioned on the horizontal table top of the three-dimensional displacement platform; the laser incident window is used for transmitting laser, so that the laser emitted by the laser can enter the box body and is focused on the surface of the sample according to set parameters; the light collector is used for coupling plasma radiation light into an optical fiber to be transmitted to the spectrometer and collecting a spectrum; the particle concentration sensor is used for monitoring the concentration of particle dust in the box body; the dust remover is used for removing dust in the sample detection box; the controller is used for carrying out system control, information processing, parameter setting and information display.
Each dimension of the three-dimensional displacement platform is an independent electric displacement platform, a stepping motor (or a servo motor) rotates a screw rod to drive a horizontal platform surface on the three-dimensional displacement platform to move, and a controller controls the three-dimensional displacement platform to move through control software.
A protective gas inlet is arranged on a box plate of the box body, a third electromagnetic valve is arranged on the protective gas inlet, the control output end of the third electromagnetic valve of the controller is connected with the control end of the third electromagnetic valve, one end of the protective gas inlet, which is positioned in the box body, is connected with an air nozzle, a gas sensor is also arranged on the inner wall of the box body, and the signal output port of the gas sensor is connected with the gas detection signal input port of the controller;
an exhaust pipe extends out of the side face of the air outlet pipeline, the exhaust pipe is communicated with the air outlet pipeline, a first electromagnetic valve is installed on the exhaust pipe, a second electromagnetic valve is installed on the air outlet pipeline and located between the exhaust pipe and the box air inlet, the second electromagnetic valve is installed close to the box air inlet, and the control output end of the first electromagnetic valve and the control output end of the second electromagnetic valve of the controller are respectively connected with the control ends of the first electromagnetic valve and the second electromagnetic valve.
Or the air outlet pipeline is provided with a three-way electromagnetic valve, the inlet of the three-way electromagnetic valve is communicated with the air outlet of the dust remover, the first outlet of the three-way electromagnetic valve is communicated with the outside, the second outlet of the three-way electromagnetic valve is communicated with the air inlet of the box body, and the control output end of the three-way electromagnetic valve of the controller is connected with the control end of the three-way electromagnetic valve.
The inner wall of the box body is also provided with a camera, a temperature sensor, a humidity sensor and a lighting lamp, and a signal output port of the camera, a signal output port of the temperature sensor and a signal output port of the humidity sensor are respectively connected with a video input port, a temperature input port and a humidity input port of the controller; the illumination output end of the controller is connected with the illumination lamp.
The protective gas inlet is used for spraying specific protective gas into the box body when needed, and the third electromagnetic valve is opened when the protective gas is sprayed so as to provide the protective gas with special requirements, so that the protective gas is filled in the box body for atmosphere protection, and the special analysis requirements are met; the camera is used for monitoring the condition inside the box body; the temperature sensor is used for monitoring the temperature in the box body; the humidity sensor is used for monitoring the humidity inside the box body; the gas sensor is used for monitoring the concentration of carbon dioxide and oxygen in the box body, the gas sensor transmits detected signals to the controller, the controller displays the concentration of gas in the box body to prompt a user to continue or stop spraying protective gas into the box body 1 according to set conditions, or the controller stops analyzing if air is mixed in the analyzing process, starts an air discharging flow, namely, reopens the third electromagnetic valve, reopens the second electromagnetic valve, opens the first electromagnetic valve, stops spraying protective gas into the box body after confirming that no air exists in the box body, a pipeline and the dust remover according to the information of the gas sensor, closes the third electromagnetic valve, closes the first electromagnetic valve and opens the second electromagnetic valve at the same time, so that the detection box enters a closed gas circulation mode and continues analyzing; the controller can make the gas in the box body be in a closed circulation state (first electromagnetic valve switch, second electromagnetic valve switch and third electromagnetic valve switch) or a gas replacement state (first electromagnetic valve switch, second electromagnetic valve switch and third electromagnetic valve switch) by controlling the on-off of the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve.
The protective gas air inlet also can be used for opening the air inlet of gas circulation state when not using protective gas and using air circumstance to carry out analysis, at this moment, the detection case is in the gas replacement state, the third solenoid valve is opened, the outside air gets into the detection case from the protective gas air inlet, then flow direction dust remover through the box air outlet, gas filters the back through the dust remover, discharge through first solenoid valve, the second solenoid valve is closed, open gas circulation has just been realized, can constantly use fresh air, can remove dust to the used air when analyzing again simultaneously, discharge clean air to the environment in, environmental protection and operator's are healthy.
When the three-way electromagnetic valve is adopted to replace the first electromagnetic valve and the second electromagnetic valve, the control process is similar.
The protective gas inlet is arranged on the side plate of the box body; the camera, the temperature sensor, the humidity sensor, the gas sensor and the illuminating lamp are all arranged on the inner upper wall of the box body; the camera, the temperature sensor, the humidity sensor, the gas sensor and a connecting cable between the illuminating lamp and the controller penetrate through a through hole in a side plate of the box body from the inside of the box body and then reach the outside of the box body; the gas sensor contains oxygen sensor and carbon dioxide sensor, and the model of oxygen sensor is: ZE03, the model of carbon dioxide sensor is: MH-Z19B, the manufacturers are: zhengzhou weisheng electronics technology ltd; the illuminating lamp is an LED lamp; the air nozzle is a hose air nozzle.
The light collector and the laser displacement sensor are respectively positioned on two sides above the horizontal table surface of the three-dimensional displacement platform; the air outlet pipeline is communicated with a box body air inlet at the upper part of one side of the box body, and the air inlet pipeline is communicated with a box body air outlet at the lower part of the other side of the box body; the particle concentration sensor is arranged on the inner upper wall of the box body; the output optical fiber of the optical collector passes through the through hole in the side plate of the box body from the inside of the box body and then reaches the outside of the box body, and the laser displacement sensor, the three-dimensional displacement platform and the connecting cable between the particulate matter concentration sensor and the controller also pass through the through hole in the side plate of the box body from the inside of the box body and then reach the outside of the box body.
The box body comprises a square or rectangular frame, box plates are mounted on the top surface, the bottom surface and the four side surfaces of the frame, a box door is arranged on the box plate on the front side surface of the frame, thread pits are uniformly distributed on the inner surface of the box plate on the bottom surface of the frame, and the three-dimensional displacement platform, the lens mounting frame, the optical collector mounting frame and the laser displacement sensor mounting frame are mounted on the inner surface of the box plate on the bottom surface of the frame through the thread pits. The box has leakproofness, and all joints related to sealing on the box need to be sealed, such as: the cable ports entering and exiting the box body are sealed by sealing measures, the box plates are sealed by sealing measures, and the like.
The box plates can be detached and newly installed, so that a user can conveniently install or adjust devices in the box body; the frame is made of sectional materials (such as angle steel), and the frame can be disassembled into 12 independent beams.
All the thread pits (M6 internal threads) are arranged in a matrix form, the pitch between every two thread pits is 2.5 cm, and the thread pits are convenient for users to add other devices according to the requirements and also convenient for the users to adjust the positions of the devices in the sample detection box according to the requirements.
The frame and the boxboard are made of metal or plastic.
The dust remover contains sealed casing, filter mantle and fan, is equipped with two-layer horizontal baffle in the casing: upper horizontal baffle and lower floor's horizontal baffle, upper horizontal baffle and lower floor's horizontal baffle divide into three cavities with casing inside: the dust remover comprises an upper cavity, a middle cavity and a lower cavity, wherein an air outlet and an air inlet of the dust remover are respectively positioned at the upper part and the lower part of a shell, the air outlet and the air inlet are respectively communicated with the upper cavity and the lower cavity, the middle parts of the upper surfaces of an upper horizontal partition plate and a lower horizontal partition plate are respectively provided with an upper through hole and a lower through hole, a fan is arranged at the upper through hole of the upper horizontal partition plate, a filter cover is arranged in the middle cavity, a cover opening of the filter cover is hermetically connected with the upper surface of the lower horizontal partition plate, and the interior of the filter cover is communicated with the lower cavity through; the control signal input port of the dust remover is arranged on the surface of the shell, and the control signal input port is connected with the power supply end of the fan.
The filter cover is of an inner layer structure and an outer layer structure, the inner layer of the filter cover is made of air filter cotton and used for performing coarse filtration on gas, and the outer layer of the filter cover is made of an HEPA high-efficiency filter screen and used for further filtering the gas.
The box door is a transparent door with a laser protection function; the transparent plate is made of fused quartz glass; the particulate matter concentration sensor is a PM2.5 sensor; the lens mounting rack is provided with an adjusting knob for adjusting the height; the controller is a computer; the three-dimensional displacement platform contains three one-axis displacement platforms, and the three one-axis displacement platforms are respectively: the X-axis displacement table, the Y-axis displacement table and the Z-axis displacement table are connected, a platform control port of the controller is connected with a communication port of the displacement platform controller, and three motor control interfaces of the displacement platform controller are respectively connected with the three one-axis displacement tables.
The transparent door is convenient for a user to observe the internal condition of the box body.
The displacement platform controller is of the following types: SC 300-3A; the types of the X-axis displacement table and the Y-axis displacement table are as follows: model TSA100-B, model number of Z-axis displacement stage: model TSA50-B, manufacturer: beijing Zhuo Li Han optical instruments Inc.; the spectrometer is an ARYELLE200 type echelle spectrometer of LTB company in Germany; the laser displacement sensor has the following types: under pine HL-G108-S-J; the model number of the PM2.5 sensor is as follows: ZH03B, manufacturer: zhengzhou Weisheng electronics technology Co.
When the sample detection box is used, a sample to be analyzed can be placed on a horizontal table top of a three-dimensional displacement platform, a beam of laser emitted by a laser is vertically projected into a box body through a laser incidence window, then the three-dimensional displacement platform is controlled to move through a controller (when the three-dimensional displacement platform moves, the up-and-down movement distance of the horizontal table top is determined according to an output signal of a laser displacement sensor, the left-and-right movement distance and the front-and-back movement distance of the horizontal table top are determined according to preset parameters inside the controller), the sample is just positioned at a set position below a focusing lens, at the moment, a light collector can collect plasma emitted light emitted by the sample, the collected light is transmitted to a spectrometer, a spectrum signal is obtained after the sample is processed by the spectrometer, then the spectrum signal is transmitted to the. Before the analysis begins, the controller starts the dust remover earlier and clears away the suspended particle in the box, can adopt open gas circulation or closed gas circulation mode, when particulate matter concentration sensor detects the particulate matter concentration in the box and drops to setting for numerical value, begin the LIBS analysis, the controller controls the dust remover according to the particulate matter concentration condition control dust remover that particulate matter sensor detected and works with suitable dust collection efficiency in the analysis process, maintain and set for the analysis gas environment, after the analysis, the controller closes the dust remover, wait for next LIBS analysis.
When the sample detection box does not carry out LIBS analysis, the controller can control the three-dimensional displacement platform to move left and right or back and forth, so that the horizontal table top is not positioned under the focusing lens, and the horizontal table top is prevented from being damaged by laser which is irradiated on the horizontal table top for a long time; or the laser is blocked by the light blocking sheet, so that the laser is prevented from entering the box body, scattering in the box body and causing an accident that the laser hurts people when the box door is opened; or temporarily turn off the laser.
The utility model has the advantages that:
1, the utility model discloses set up three-dimensional displacement platform, focusing lens, light collector, laser displacement sensor and particulate matter concentration sensor in sealed box, the box is equipped with spectrometer, dust remover and controller outward, can not only accomplish bearing of sample, the removal of sample position, collection and the analysis of laser focusing and plasma emission light, can also detect the particle dust concentration in the box, and remove dust to the gas in the box through the dust remover, the influence of the particle that the previous excitation produced when having effectively prevented the LIBS analysis to the analysis of the next time, and environment and operating personnel's is healthy has still been protected.
2, the utility model discloses a be equipped with the protective gas air inlet on the box boxboard, the one end that the protective gas air inlet is located the box is connected with the air nozzle, the air nozzle can be to the internal injection specific protective gas of box, make the protective gas full of the box inside, carry out atmosphere protection, be equipped with camera, temperature sensor, humidity transducer and gas sensor on the inner wall of box, the condition of the box inside can be monitored to the camera, temperature sensor and humidity transducer can monitor the temperature and humidity in the box, gas sensor can monitor the concentration of carbon dioxide and oxygen in the box, whether confirm the interior air of box exhaust, whether reach the special gas protection environment that needs in the box; therefore, the utility model discloses a service function is strong.
3. The utility model discloses can adopt closed circulation or gaseous replacement mode in a flexible way, the particulate matter is collected in the dust remover, can avoid the dust particulate matter that produces to influence LIBS analytical performance in the analytic process, also avoids the dust pollution environment that the analysis produced simultaneously, and the dust of also having avoided the analysis to produce is inhaled by experiment operating personnel and is endangered operating personnel healthy. In addition, when special gas protection is used, a closed gas circulation mode can be adopted, and a special gas environment can be maintained all the time only by a certain amount of gas, so that the problems that the consumption of protective gas is high, the use cost of the protective gas is high, and the gas (particularly inert gas) is easy to diffuse in an analysis station to endanger the personal safety and health of experimenters due to the fact that an open box body or a gas circuit system needs to inject new gas continuously are solved.
4. The sample detection box is used for setting a laser for exciting the spectrum and a spectrometer for analyzing the spectrum outside the box body, so that the sample detection box is convenient to configure and select a proper model according to requirements, and has strong expansion and adaptability.
(IV) description of the drawings:
FIG. 1 is a schematic diagram of a sample detection chamber for laser-induced breakdown spectroscopy;
FIG. 2 is a left side view of the structure of FIG. 1;
FIG. 3 is a schematic diagram of the right side view of FIG. 1;
FIG. 4 is a schematic top view of the structure of FIG. 1;
FIG. 5 is a schematic sectional view A-A of FIG. 4;
FIG. 6 is a schematic sectional view of the structure of B-B in FIG. 5;
FIG. 7 is a schematic cross-sectional view of C-C of FIG. 5;
FIG. 8 is a schematic view of the construction of a dust catcher;
FIG. 9 is one of schematic diagrams of circuit, gas circuit and light circuit connections of a sample detection box for laser-induced breakdown spectroscopy;
fig. 10 is a second schematic diagram of the circuit, the gas circuit and the optical circuit connection of the sample detection box for laser-induced breakdown spectroscopy analysis.
(V) detailed embodiment:
the first embodiment is as follows:
referring to fig. 1 to 9, in the drawings, a sample detection box for laser-induced breakdown spectroscopy analysis includes a sealed box body 1, a three-dimensional displacement platform 2, a focusing lens 3, an optical collector 4, a laser displacement sensor 5, a particulate matter concentration sensor 6, a spectrometer, a dust remover 7 and a controller, the spectrometer, the dust remover 7 and the controller are all arranged outside the box body 1, the three-dimensional displacement platform 2, the focusing lens 3, the optical collector 4, the laser displacement sensor 5 and the particulate matter concentration sensor 6 are all arranged inside the box body 1, and a box door 8 is arranged on one side surface of the box body 1; the three-dimensional displacement platform 2 is fixedly installed in the middle of the inner bottom surface of the box body 1, a laser incidence window 9 is arranged in the middle of a top plate of the box body 1, a transparent plate is installed on the laser incidence window 9, a lens installation frame 10, an optical collector installation frame 11 and a laser displacement sensor installation frame 12 are fixedly installed on the inner wall of the box body 1, the focusing lens 3, the optical collector 4 and the laser displacement sensor 5 are respectively installed on the lens installation frame 10, the optical collector installation frame 11 and the laser displacement sensor installation frame 12, and the particulate matter concentration sensor 6 is fixedly installed on the inner wall of the box body 1; when the horizontal table 13 of the three-dimensional displacement platform 2 moves to the middle position, the horizontal table 13 is just positioned under the laser incidence window 9, the focusing lens 3 is positioned between the laser incidence window 9 and the horizontal table 13 of the three-dimensional displacement platform 2, the focusing lens 3 is positioned under the laser incidence window 9, the height is adjustable, the light collector 4 and the laser displacement sensor 5 are positioned above the side of the horizontal table 13 of the three-dimensional displacement platform 2, the light collection port of the light collector 4 faces the middle part of the horizontal table 13 of the three-dimensional displacement platform 2, the objective focus of the light collector 4 is positioned on the laser transmission axis of the light collector 4, and the laser emission surface of the laser displacement sensor 5 is opposite to the horizontal table 13 of the three-dimensional displacement platform 2; the output optical fiber 43 of the optical collector 4 is connected with the optical fiber input port of the spectrometer, the signal output port of the spectrometer is connected with the spectral signal input port of the controller, the signal output port of the laser displacement sensor 5 and the signal output port of the particulate matter concentration sensor 6 are respectively connected with the sample surface position monitoring signal input port and the particulate matter concentration input port of the controller through data cables, and the platform control port of the controller is connected with the three-dimensional displacement platform 2 through the displacement platform controller; an air outlet 14 and an air inlet 15 of the dust remover 7 are respectively communicated with the interior of the box body 1 through an air outlet pipeline 16 and an air inlet pipeline 17, the air outlet pipeline 16 is communicated with an air inlet 25 of the box body, the air inlet pipeline 17 is communicated with an air outlet 26 of the box body, and a control signal input port of the dust remover 7 is connected with a dust removal control signal output port of the controller.
When the laser-induced breakdown spectroscopy is carried out, a laser is needed, the laser is positioned right above the laser incidence window 9, laser emitted by the laser directly vertically enters the laser incidence window 9, and a laser emission signal control port of the controller is connected with the laser.
The box body 1 is used for providing a stable and on-demand set analysis environment; the horizontal table surface 13 of the three-dimensional displacement platform 2 is used for bearing and moving a sample, so that analysis is facilitated; the laser displacement sensor 5 is used for ensuring that the upper surface of the sample is positioned at a set height by measuring the distance between the laser displacement sensor and the upper surface of the sample positioned on the horizontal table top 13 of the three-dimensional displacement platform 2; the laser incident window 9 is used for transmitting laser, so that the laser emitted by the laser can enter the box body 1 and is focused on the surface of a sample according to set parameters; the light collector 4 is used for coupling plasma radiation light into an optical fiber to be transmitted to the spectrometer and collecting a spectrum; the particle concentration sensor 6 is used for monitoring the concentration of particle dust in the box body 1; the dust remover 7 is used for removing dust in the sample detection box; the controller is used for carrying out system control, information processing, parameter setting and information display.
Each dimension of the three-dimensional displacement platform 2 is an independent electric displacement platform, a stepping motor (or a servo motor) rotates a screw rod to drive a horizontal platform surface on the three-dimensional displacement platform to move, and a controller controls the three-dimensional displacement platform 2 to move through control software.
A protective gas inlet 18 is arranged on a box plate 28 of the box body 1, a third electromagnetic valve 49 is arranged on the protective gas inlet 18, the control output end of the third electromagnetic valve of the controller is connected with the control end of the third electromagnetic valve 49, one end of the protective gas inlet 18, which is positioned in the box body 1, is connected with an air nozzle 19, a gas sensor is also arranged on the inner wall of the box body 1, and the signal output port of the gas sensor is connected with the gas detection signal input port of the controller;
an exhaust pipe 47 extends out of the side face of the air outlet pipeline 16, the exhaust pipe 47 is communicated with the air outlet pipeline 16, a first electromagnetic valve 45 is installed on the exhaust pipe 47, a second electromagnetic valve 46 is installed on the air outlet pipeline 16 and located between the exhaust pipe 47 and the box air inlet 25, the second electromagnetic valve 46 is installed close to the box air inlet 25, and the first electromagnetic valve control output end and the second electromagnetic valve control output end of the controller are respectively connected with the control ends of the first electromagnetic valve 45 and the second electromagnetic valve 46.
The inner wall of the box body 1 is further provided with a camera 21, a temperature sensor 22, a humidity sensor 23 and an illuminating lamp 44, a signal output port of the camera 21, a signal output port of the temperature sensor 22 and a signal output port of the humidity sensor 23 are respectively connected with a video input port, a temperature input port and a humidity input port of the controller, and an illuminating output end of the controller is connected with the illuminating lamp 44.
The protective gas inlet 18 is used for injecting specific protective gas into the box body 1 when needed, and the third electromagnetic valve 49 is opened when the protective gas is injected, so that the protective gas with special needs can be provided, the protective gas is filled in the box body 1 for atmosphere protection, and the special analysis needs are met; the camera 21 is used for monitoring the condition inside the box body 1; the temperature sensor 22 is used to monitor the temperature inside the cabinet 1; the humidity sensor 23 is used to monitor the humidity inside the cabinet 1; the gas sensor is used for monitoring the concentration of carbon dioxide and oxygen in the box body 1, the gas sensor transmits a detected signal to the controller, the controller displays the concentration of the gas in the box body 1 to prompt a user to continue or stop spraying protective gas into the box body 1 according to a set condition, or the controller stops analysis if air is mixed in the analysis process, starts an air discharging flow, namely reopens the third electromagnetic valve 49, reopens the second electromagnetic valve 46, opens the first electromagnetic valve 45, stops spraying protective gas into the box body 1 after confirming that no air exists in the box body 1, a pipeline and the dust remover 7 according to the information of the gas sensor, closes the third electromagnetic valve 49, closes the first electromagnetic valve 45 and opens the second electromagnetic valve 46 at the same time, so that the detection box enters a closed gas circulation mode to continue analysis; the controller can make the gas in the box body 1 in a closed circulation state (the first electromagnetic valve 45 is closed, the second electromagnetic valve 46 is opened, and the third electromagnetic valve 49 is closed) or a gas replacement state (the first electromagnetic valve 45 is opened, the second electromagnetic valve 46 is closed, and the third electromagnetic valve 49 is opened) by controlling the on-off of the first electromagnetic valve 45, the second electromagnetic valve 46 and the third electromagnetic valve 49.
The protective gas inlet 18 can also be used for opening the air inlet in a gas circulation state when the air environment is used for analysis without using protective gas, at the moment, the detection box is in a gas replacement state, the third electromagnetic valve 49 is opened, the outside air enters the detection box from the protective gas inlet 18 and then flows to the dust remover 7 through the box body air outlet 26, the gas is filtered by the dust remover 7 and then is discharged through the first electromagnetic valve 45, the second electromagnetic valve 46 is closed, open gas circulation is realized, fresh air can be continuously used, meanwhile, dust removal can be carried out on the air used in analysis, clean air is discharged into the environment, and the environment and the physical health of an operator are protected.
The protective gas inlet 18 is arranged on the side plate of the box body 1; the camera 21, the temperature sensor 22, the humidity sensor 23, the gas sensor and the illuminating lamp 44 are all arranged on the inner upper wall of the box body 1; the connecting cables between the camera 21, the temperature sensor 22, the humidity sensor 23, the gas sensor and the illuminating lamp 44 and the controller penetrate through the through holes 24 in the side plates of the box body 1 from the inside of the box body 1 and then reach the outside of the box body 1; the gas sensor comprises an oxygen sensor 20 and a carbon dioxide sensor 31, wherein the type of the oxygen sensor 20 is as follows: ZE03, the model number of carbon dioxide sensor 31 is: MH-Z19B, the manufacturers are: zhengzhou weisheng electronics technology ltd; the illumination lamp 44 is an LED lamp; the air nozzle 19 is a hose air nozzle.
The light collector 4 and the laser displacement sensor 5 are respectively positioned at two sides above a horizontal table surface 13 of the three-dimensional displacement platform 2; the air outlet pipeline 16 is communicated with a box air inlet 25 at the upper part of one side of the box body 1, and the air inlet pipeline 17 is communicated with a box air outlet 26 at the lower part of the other side of the box body 1; the particulate matter concentration sensor 6 is arranged on the inner upper wall of the box body 1; the output optical fiber 43 of the light collector 4 passes through the through hole 24 on the side plate of the box body 1 from the inside of the box body 1 and then reaches the outside of the box body 1, and the connecting cables between the laser displacement sensor 5, the three-dimensional displacement platform 2, the particulate matter concentration sensor 6 and the controller also pass through the through hole 24 on the side plate of the box body 1 from the inside of the box body 1 and then reach the outside of the box body 1.
The box body 1 comprises a square frame 27, box plates 28 are mounted on the top surface, the bottom surface and four side surfaces of the frame 27, box doors 8 are arranged on the box plates 28 on the front side surface of the frame 27, thread pits 29 are uniformly distributed on the inner surface of the box plates 28 on the bottom surface of the frame 27, and the three-dimensional displacement platform 2, the lens mounting frame 10, the optical collector mounting frame 11 and the laser displacement sensor mounting frame 12 are mounted on the inner surface of the box plates 28 on the bottom surface of the frame 27 through the thread pits 29. The box body 1 has the leakproofness, and all joints related to the leakproofness on the box body 1 need to be sealed, such as: the cable ports entering and exiting the box body 1 are sealed by sealing measures, the box plates 28 are sealed by sealing measures, and the like.
The box plates 28 can be detached and newly installed, so that a user can conveniently install or adjust devices in the box body 1; the frame 27 is made of angle steel, and the frame 27 can be disassembled into 12 independent beams.
All the thread pits 29 (M6 internal threads) are arranged in a matrix form, the pitch between the thread pits 29 is 2.5 cm, and the thread pits 29 are convenient for a user to add other devices according to the requirement and also convenient for the user to adjust the positions of the devices in the sample detection box according to the requirement.
The frame 27 and the box plate 28 are made of metal.
In practical application, in order to more conveniently adjust the positions of the light collector 4 and the laser displacement sensor 5, a cross rod connected with the light collector 4 in the light collector mounting rack 11 can be connected to a vertical rod through a clamp, so that the height of the cross rod can be adjusted, and a two-dimensional plane displacement table can be arranged at the bottom of the light collector mounting rack 11; can make the horizontal pole of connecting laser displacement sensor 5 in the laser displacement sensor mounting bracket 12 pass through anchor clamps and connect on the montant to the height of horizontal pole can be adjusted, a two-dimensional plane displacement platform also can be established to the bottom of laser displacement sensor mounting bracket 12.
The dust remover 7 comprises a sealed shell 32, a filter cover 33 and a fan 34, wherein two layers of horizontal partition plates are arranged in the shell 32: the upper horizontal partition plate 35 and the lower horizontal partition plate 36 divide the interior of the housing 32 into three cavities by the upper horizontal partition plate 35 and the lower horizontal partition plate 36: the dust remover comprises an upper cavity 37, a middle cavity 38 and a lower cavity 39, wherein an air outlet 14 and an air inlet 15 of the dust remover 7 are respectively positioned at the upper part and the lower part of a shell 32, the air outlet 14 and the air inlet 15 are respectively communicated with the upper cavity 37 and the lower cavity 39, the middle parts of the upper surfaces of an upper horizontal partition plate 35 and a lower horizontal partition plate 36 are respectively provided with an upper through hole 40 and a lower through hole 41, a fan 34 is arranged at the upper through hole 40 of the upper horizontal partition plate 35, a filter cover 33 is arranged in the middle cavity 38, the cover opening of the filter cover 33 is hermetically connected with the upper surface of the lower horizontal partition plate 36, and the inside of the filter cover 33 is communicated with the lower cavity 39 through the lower; a control signal input port 42 of the dust collector 7 is provided on the surface of the housing 32, and the control signal input port 42 is connected to a power supply terminal of the fan 34.
The filter cover 33 is of an inner layer and an outer layer, the inner layer of the filter cover 33 is made of air filter cotton and used for performing coarse filtration on gas, and the outer layer of the filter cover 33 is made of an HEPA high-efficiency filter screen and used for further filtering the gas.
The box door 8 is a transparent door with a laser protection function; the transparent plate is made of fused quartz glass; the particulate matter concentration sensor 6 is a PM2.5 sensor; the lens mounting frame 10 is provided with an adjusting knob 30 for adjusting the height; the controller is a computer; the three-dimensional displacement platform 2 comprises three one-axis displacement tables which are respectively as follows: the X-axis displacement table, the Y-axis displacement table and the Z-axis displacement table are connected, a platform control port of the controller is connected with a communication port of the displacement platform controller, and three motor control interfaces of the displacement platform controller are respectively connected with the three one-axis displacement tables.
The transparent door facilitates the user to observe the inside of the cabinet 1.
The displacement platform controller is of the following types: SC 300-3A; the types of the X-axis displacement table and the Y-axis displacement table are as follows: model TSA100-B, model number of Z-axis displacement stage: model TSA50-B, manufacturer: beijing Zhuo Li Han optical instruments Inc.; the spectrometer is an ARYELLE200 type echelle spectrometer of LTB company in Germany; the laser displacement sensor 5 has the following model: under pine HL-G108-S-J; the model number of the PM2.5 sensor is as follows: ZH03B, manufacturer: zhengzhou Weisheng electronics technology Co.
When the sample detection box is used, a sample to be analyzed can be placed on a horizontal table top 13 of a three-dimensional displacement platform 2, a laser beam emitted by a laser is vertically projected into a box body 1 through a laser incidence window 9, then the three-dimensional displacement platform 2 is controlled to move through a controller (when the three-dimensional displacement platform moves, the up-and-down movement distance of the horizontal table top 13 is determined according to an output signal of a laser displacement sensor 5, the left-and-right movement distance and the front-and-back movement distance of the horizontal table top 13 are determined according to preset parameters in the controller), the sample is just positioned at a set position below a focusing lens 3, at the moment, a light collector 4 can collect plasma emission light emitted by the sample, the collected light is conveyed into a spectrometer, a spectrum signal is obtained after the spectrum signal is processed by the spectrometer, and then the spectrum signal is conveyed into the. Before the analysis begins, the controller starts the dust remover 7 to remove suspended particles in the box body 1, an open gas circulation mode or a closed gas circulation mode can be adopted, when the particle concentration sensor 6 detects that the particle concentration in the box body 1 drops to a set value, LIBS analysis is started, the controller controls the dust remover 7 to work with proper dust removal efficiency according to the condition of the particle concentration detected by the particle concentration sensor 6 in the analysis process, a set analysis gas environment is maintained, and after the analysis is finished, the controller closes the dust remover 7 to wait for next LIBS analysis.
When the sample detection box does not carry out LIBS analysis, the controller can control the three-dimensional displacement platform 2 to move left and right or back and forth, so that the horizontal table surface 13 is not positioned under the focusing lens 3, and the horizontal table surface 13 is prevented from being damaged by laser which is irradiated on the horizontal table surface 13 for a long time; or the laser is blocked by the light blocking sheet, so that the laser is prevented from entering the box body 1 and scattering in the box body 1, and the laser hurts people when the box door is opened; or temporarily turn off the laser.
Example two:
referring to fig. 1 to 8 and 10, the numbers in the figures are the same as those in the first embodiment, the meanings of the symbols are the same, the working processes are the same, and the same points are not repeated, except that: the air outlet pipeline 16 is provided with a three-way electromagnetic valve 48, the inlet of the three-way electromagnetic valve 48 is communicated with the air outlet 14 of the dust remover 7, the first outlet of the three-way electromagnetic valve 48 is communicated with the outside, the second outlet of the three-way electromagnetic valve 48 is communicated with the air inlet 25 of the box body, the three-way electromagnetic valve 48 is arranged close to the air inlet 25 of the box body, and the control output end of the three-way electromagnetic valve of the controller is connected with the control end of the three-.
When the three-way solenoid valve 48 is used instead of the first solenoid valve 45 and the second solenoid valve 46 in the first embodiment, the control process is similar.
Claims (10)
1. A sample detection case for laser-induced breakdown spectroscopy analysis, characterized by: the three-dimensional displacement type spectrometer comprises a sealed box body, a three-dimensional displacement platform, a focusing lens, an optical collector, a laser displacement sensor, a particulate matter concentration sensor, a spectrometer, a dust remover and a controller, wherein the spectrometer, the dust remover and the controller are all arranged outside the box body; the three-dimensional displacement platform is fixedly arranged in the middle of the inner bottom surface of the box body, a laser incidence window is arranged in the middle of a top plate of the box body, a transparent plate is arranged on the laser incidence window, a lens mounting frame, an optical collector mounting frame and a laser displacement sensor mounting frame are fixedly arranged on the inner wall of the box body, the focusing lens, the optical collector and the laser displacement sensor are respectively arranged on the lens mounting frame, the optical collector mounting frame and the laser displacement sensor mounting frame, and the particulate matter concentration sensor is fixedly arranged on the inner wall of the box body; when the horizontal table top of the three-dimensional displacement platform moves to the middle position, the horizontal table top is just positioned under the laser incidence window, the focusing lens is positioned between the laser incidence window and the horizontal table top of the three-dimensional displacement platform, the focusing lens is positioned under the laser incidence window, the light collector and the laser displacement sensor are positioned above the side of the horizontal table top of the three-dimensional displacement platform, the light collection port of the light collector faces the middle part of the horizontal table top of the three-dimensional displacement platform, and the laser emission surface of the laser displacement sensor is just opposite to the horizontal table top of the three-dimensional displacement platform; the output optical fiber of the optical collector is connected with the optical fiber input port of the spectrometer, the signal output port of the spectrometer is connected with the spectral signal input port of the controller, the signal output port of the laser displacement sensor and the signal output port of the particulate matter concentration sensor are respectively connected with the sample surface position monitoring signal input port and the particulate matter concentration input port of the controller, and the platform control port of the controller is connected with the three-dimensional displacement platform through the displacement platform controller; the air outlet and the air inlet of the dust remover are respectively communicated with the interior of the box body through an air outlet pipeline and an air inlet pipeline, the air outlet pipeline is communicated with the air inlet of the box body, the air inlet pipeline is communicated with the air outlet of the box body, and a control signal input port of the dust remover is connected with a dust removal control signal output port of the controller.
2. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the utility model discloses a gas sensor, including a controller, a gas outlet pipeline, a blast pipe and air-out pipeline intercommunication, install first solenoid valve on the blast pipe, just be located and install the second solenoid valve between blast pipe and the box air intake on the air-out pipeline, be equipped with the protective gas air inlet on the boxboard of box, install the third solenoid valve on the protective gas air inlet, the third solenoid valve control output of controller is connected with the control end of third solenoid valve, the one end that the protective gas air inlet is located the box inside is connected with the air nozzle, still be equipped with gas sensor on the inner wall of box, gas sensor's signal output port and the gaseous detection signal input port of controller are connected, a blast pipe stretches out to the side of air-out pipeline, blast pipe and air-out pipeline intercommunication, install.
3. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the dust remover is characterized in that a protective gas inlet is formed in a box plate of the box body, a third electromagnetic valve is installed on the protective gas inlet, the control output end of the third electromagnetic valve of the controller is connected with the control end of the third electromagnetic valve, one end, located inside the box body, of the protective gas inlet is connected with an air nozzle, a gas sensor is further arranged on the inner wall of the box body, the signal output end of the gas sensor is connected with the gas detection signal input end of the controller, a three-way electromagnetic valve is installed on an air outlet pipeline, the inlet of the three-way electromagnetic valve is communicated with the air outlet of the dust remover, the first outlet of the three-way electromagnetic valve is communicated with the outside, the second outlet of the three-way electromagnetic valve is communicated.
4. A sample detection kit for laser induced breakdown spectroscopy as claimed in claim 2 or claim 3 wherein: the inner wall of the box body is also provided with a camera, a temperature sensor, a humidity sensor and a lighting lamp, a signal output port of the camera, a signal output port of the temperature sensor and a signal output port of the humidity sensor are respectively connected with a video input port, a temperature input port and a humidity input port of the controller, and a lighting output end of the controller is connected with the lighting lamp.
5. The sample detection chamber for laser induced breakdown spectroscopy of claim 4, wherein: the protective gas inlet is arranged on a side plate of the box body; the camera, the temperature sensor, the humidity sensor, the gas sensor and the illuminating lamp are all arranged on the inner upper wall of the box body; the camera, the temperature sensor, the humidity sensor, the gas sensor and a connecting cable between the illuminating lamp and the controller penetrate through a through hole in a side plate of the box body from the inside of the box body and then reach the outside of the box body; the gas sensor comprises an oxygen sensor and a carbon dioxide sensor; the air nozzle is a hose air nozzle.
6. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the light collector and the laser displacement sensor are respectively positioned on two sides above a horizontal table top of the three-dimensional displacement platform; the air outlet pipeline is communicated with a box body air inlet at the upper part of one side of the box body, and the air inlet pipeline is communicated with a box body air outlet at the lower part of the other side of the box body; the particle concentration sensor is arranged on the inner upper wall of the box body; the output optical fiber of the optical collector passes through the through hole in the side plate of the box body from the inside of the box body and then reaches the outside of the box body, and the laser displacement sensor, the three-dimensional displacement platform and the connecting cable between the particulate matter concentration sensor and the controller also pass through the through hole in the side plate of the box body from the inside of the box body and then reach the outside of the box body.
7. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the box body comprises a square or rectangular frame, box plates are mounted on the top surface, the bottom surface and the four side surfaces of the frame, box doors are arranged on the box plates on the front side surface of the frame, thread pits are uniformly distributed on the inner surface of the box plate on the bottom surface of the frame, and the three-dimensional displacement platform, the lens mounting frame, the optical collector mounting frame and the laser displacement sensor mounting frame are mounted on the inner surface of the box plate on the bottom surface of the frame through the thread pits.
8. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the dust remover contains sealed casing, filter mantle and fan, is equipped with two-layer horizontal baffle in the casing: upper horizontal baffle and lower floor's horizontal baffle, upper horizontal baffle and lower floor's horizontal baffle divide into three cavities with casing inside: the dust remover comprises an upper cavity, a middle cavity and a lower cavity, wherein an air outlet and an air inlet of the dust remover are respectively positioned at the upper part and the lower part of a shell, the air outlet and the air inlet are respectively communicated with the upper cavity and the lower cavity, the middle parts of the upper surfaces of an upper horizontal partition plate and a lower horizontal partition plate are respectively provided with an upper through hole and a lower through hole, a fan is arranged at the upper through hole of the upper horizontal partition plate, a filter cover is arranged in the middle cavity, a cover opening of the filter cover is hermetically connected with the upper surface of the lower horizontal partition plate, and the interior of the filter cover is communicated with the lower cavity through; the control signal input port of the dust remover is arranged on the surface of the shell, and the control signal input port is connected with the power supply end of the fan.
9. The sample detection chamber for laser induced breakdown spectroscopy of claim 1, wherein: the box door is a transparent door; the transparent plate is made of fused quartz glass; the particulate matter concentration sensor is a PM2.5 sensor; the lens mounting rack is provided with an adjusting knob for adjusting the height; the controller is a computer; the three-dimensional displacement platform contains three one-axis displacement platforms, and the three one-axis displacement platforms are respectively: the X-axis displacement table, the Y-axis displacement table and the Z-axis displacement table are connected, a platform control port of the controller is connected with a communication port of the displacement platform controller, and three motor control interfaces of the displacement platform controller are respectively connected with the three one-axis displacement tables.
10. The sample detection chamber for laser induced breakdown spectroscopy of claim 9, wherein: the displacement platform controller is of the following types: SC 300-3A; the types of the X-axis displacement table and the Y-axis displacement table are as follows: model TSA100-B, model number of Z-axis displacement stage: TSA 50-B; the spectrometer is an ARYELLE200 type echelle spectrometer of LTB company in Germany; the laser displacement sensor has the following types: under pine HL-G108-S-J; the model number of the PM2.5 sensor is as follows: ZH 03B.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921239429.0U CN210322800U (en) | 2019-08-02 | 2019-08-02 | Sample detection box for laser-induced breakdown spectroscopy |
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| CN201921239429.0U CN210322800U (en) | 2019-08-02 | 2019-08-02 | Sample detection box for laser-induced breakdown spectroscopy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261368A (en) * | 2019-08-02 | 2019-09-20 | 平顶山学院 | Sample detection case for laser induced breakdown spectroscopy analysis |
| CN111610179A (en) * | 2020-05-20 | 2020-09-01 | 北京科技大学 | System and method for quickly detecting components LIBS of high-temperature sample in front of furnace |
-
2019
- 2019-08-02 CN CN201921239429.0U patent/CN210322800U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261368A (en) * | 2019-08-02 | 2019-09-20 | 平顶山学院 | Sample detection case for laser induced breakdown spectroscopy analysis |
| CN110261368B (en) * | 2019-08-02 | 2023-11-28 | 平顶山学院 | Sample detection box for laser-induced breakdown spectroscopy |
| CN111610179A (en) * | 2020-05-20 | 2020-09-01 | 北京科技大学 | System and method for quickly detecting components LIBS of high-temperature sample in front of furnace |
| CN111610179B (en) * | 2020-05-20 | 2021-06-25 | 北京科技大学 | System and method for quickly detecting components LIBS of high-temperature sample in front of furnace |
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