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KR-102964404-B1 - A device for analyzing objects in contact with a stationary surface, which move through it, using a laser induced breakdown spectroscope

KR102964404B1KR 102964404 B1KR102964404 B1KR 102964404B1KR-102964404-B1

Abstract

An analysis device comprising a housing having an opening formed therein and a LIBS module coupled to the housing is disclosed. The LIBS module is configured to irradiate a laser beam into the interior of the housing through the opening and to collect plasma emission light present inside the housing through the opening.

Inventors

  • 윤지원
  • 양준석

Assignees

  • 에스디티 주식회사

Dates

Publication Date
20260513
Application Date
20230407

Claims (11)

  1. A screw conveyor (200) comprising a housing (210) having a second opening (212) formed therein and a rotary screw (220); and LIBS module (100) coupled to the above housing; Includes, The LIBS module is configured to irradiate a laser beam into the housing through the second opening and to collect plasma emission light present inside the housing through the second opening. The second opening is positioned at the location where potential energy is smallest in the arrangement state of the housing among the cross-sections of the housing including the second opening, and is positioned in a part of the cross-section such that a predetermined object existing inside the housing comes into contact when the object passes through the cross-section of the housing including the second opening. The object passing through the above housing is a liquid, powder, or amorphous pieces, Analysis device.
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  6. In paragraph 1, the analysis device wherein the housing is positioned in a tilted state.
  7. In paragraph 1, The above LIBS module is, An observation window member (150) aligned with the second opening above; A focusing lens (141) configured to focus the laser beam transmitted through the first cable (131) to a point inside the housing through the observation window member; and A plasma emission light collecting lens (142) that collects plasma emission light present inside the housing through the observation window member and transmits it to the second cable (132); including, Analysis device.
  8. In Paragraph 7, A pulse laser (710) that generates the above laser beam; Spectrometer (760); The first cable comprising an optical transmission medium that is coupled to the LIBS module and transmits the laser beam; The second cable comprising a light transmission medium coupled to the LIBS module and transmitting the collected plasma emission light to the spectrometer; and A detector (770) that detects light output by the spectrometer (760); including, Analysis device.
  9. In paragraph 1, A further comprising an optical closing member disposed to block the second opening so as not to form a notch by the second opening on the inner surface of the housing, Analysis device.
  10. A LIBS module configured to be coupled to the housing included in the analysis device of claim 1, An observation window member (150) configured to be aligned with a second opening formed in the housing; A focusing lens (141) configured to focus a laser beam transmitted through a first cable (131) to a point inside the housing through the observation window member; A plasma emission light collecting lens (142) that collects plasma emission light present inside the housing through the observation window member and transmits it to the second cable (132); and A main body cover housing the observation window member, the focusing lens, and the plasma emission light collecting lens. including, LIBS module.
  11. In Paragraph 10, A first cable holder (121) to which the first cable is connected; and A second cable holder (122) to which the second cable is connected; Includes more, The above main body cover is composed of a first cover (111) and a second cover (112), and In order to combine the LIBS module with the housing, the LIBS module has a first coupling surface (101) formed thereon that contacts the outer surface of the housing, and The first cover is provided with a first surface that constitutes at least a part of the first coupling surface, and On the first surface, a first opening (102) is formed so as to be aligned with the second opening when the LIBS module is coupled to the housing. The above observation window member (150) is installed to block the first opening (102), LIBS module.

Description

A device for analyzing objects in contact with a stationary surface, which move through it, using a laser induced breakdown spectroscope The present invention relates to laser-induced spectroscopic analysis technology, and more particularly to a technology for analyzing an object moving in contact with a fixed surface. Laser Induced Breakdown Spectroscopy (LIBS) is an analytical technique used to determine the elemental composition of a sample. It utilizes high-energy laser pulses to generate a plasma within the sample object, which is then analyzed using spectroscopy. The analytical process begins by focusing high-energy laser beams onto the sample surface, causing some of the object to vaporize and form a plasma. This plasma emits light at various wavelengths, which can be captured and analyzed using a spectrometer. Since each element in the sample emits light within a unique set of wavelengths, the composition of the sample can be determined by identifying the specific spectral lines emitted by each element. LIBS offers several advantages over other elemental analysis techniques. It is non-destructive, as it allows for analysis without altering or destroying the sample. Additionally, results are obtained relatively quickly, typically within seconds to minutes. Furthermore, LIBS can be used to analyze samples in various states, including solids, liquids, and gases. LIBS is widely utilized in fields such as environmental analysis, materials science, and industrial process control. It is particularly suitable for cases where sample preparation or transportation is difficult, and is very useful because only a small amount of material is required and large sample preparation is not necessary. The main components of LIBS are as follows. LIBS uses a high-power laser to generate plasma from the sample. Laser energy is focused on the sample, removing the material and vaporizing it. The laser-induced plasma contains ions and atoms generated from the sample. These emit characteristic light when they return to the ground state. By analyzing this light, the elemental composition of the sample can be determined. LIBS uses a spectrometer to collect and analyze the light emitted from the plasma. The light is dispersed into constituent wavelengths, and the intensity of each wavelength is measured. LIBS uses detectors to measure the intensity of the light emitted from the plasma at each wavelength. Detectors typically consist of CCD cameras or photomultiplier tubes. LIBS uses a calibration curve to correlate the intensity of the emitted light with the elemental concentration of the sample. The calibration curve is constructed by analyzing a sample of known composition under the same experimental conditions as the sample being analyzed. The sample being analyzed must be properly prepared for accurate and precise measurements. This requires maintaining sample uniformity through methods such as polishing or grinding the sample, or using sample holders or matrices. LIBS possesses the following characteristics. LIBS is useful for high-throughput analysis as it can rapidly analyze samples within seconds. Furthermore, as LIBS is a non-destructive analytical technique that does not destroy samples, it is particularly important when analyzing valuable or irreplaceable samples. Because LIBS is a highly sensitive technology capable of detecting trace elements within samples, it can be effectively utilized in various fields such as environmental monitoring, industrial process control, and forensic analysis. LIBS is a technology capable of analyzing a wide range of materials, including metals, minerals, ceramics, polymers, and biological tissues. LIBS requires minimal sample preparation, which saves time and reduces the risk of sample contamination. LIBS systems can be designed for portability and are useful for on-site analysis or measurements. LIBS can detect and quantitatively analyze multiple elements in a single analysis. Because LIBS can quantitatively analyze the elemental composition of samples, it is effectively utilized in various fields such as quality control and process optimization. To generate a laser beam in LIBS, the system may include a laser cavity, a pump source, a Q-switch, an optical device, and control electronics. The laser cavity is a core component for generating the laser beam and may include two mirrors, an active medium (such as gas or crystal), and a power source that supplies energy to the active medium. The pump source is a component that provides energy to the active medium of the laser cavity and may be a flash lamp, a diode laser, or another laser that emits light at a specific wavelength corresponding to the absorption spectrum of the active medium. The Q-switch is a device that controls the timing of laser pulses and generates high-energy pulses by rapidly switching the cavity between two states. The optical device is a continuum of lenses and mirrors used to shape and focus the laser beam. The opt