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758 results about "Laser-induced breakdown spectroscopy" patented technology
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Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites samples. The formation of the plasma only begins when the focused laser achieves a certain threshold for optical breakdown, which generally depends on the environment and the target material. In principle, LIBS can analyze any matter regardless of its physical state, be it solid, liquid or gas. Because all elements emit light of characteristic frequencies when excited to sufficiently high temperatures, LIBS can (in principle) detect all elements, limited only by the power of the laser as well as the sensitivity and wavelength range of the spectrograph & detector. If the constituents of a material to be analyzed are known, LIBS may be used to evaluate the relative abundance of each constituent element, or to monitor the presence of impurities. In practice, detection limits are a function of a) the plasma excitation temperature, b) the light collection window, and c) the line strength of the viewed transition. LIBS makes use of optical emission spectrometry and is to this extent very similar to arc/spark emission spectroscopy.
Method And System For Obtaining Geochemistry Information From Pyrolysis Induced By Laser Induced Breakdown Spectroscopy
ActiveUS20160054284A1Simple methodEmission spectroscopyEarth material testingNon destructiveLaser-induced breakdown spectroscopy
A method for determining geochemistry of at least one geological sample with laser-induced breakdown spectral measurements performed on the geological sample in a time variant manner with spectral acquisitions made after each of a plurality of measurement shots, spectral pre-processing performed as necessary, and subsequent analysis is applied to the collected data to determine at least one geochemistry parameter of the sample. The method can provide a rapid method to estimate thermal maturity of a sample, which does not require sample preparation, and which can be non-destructive with respect to portions of the sample. A system for performing the method also is provided.
Owner:HALLIBURTON ENERGY SERVICES INC
Time resolved laser raman spectroscopy using a single photon avalanche diode array
InactiveUS20130342835A1Radiation pyrometrySpectrum investigationLaser-induced breakdown spectroscopySpectrometer
A Raman spectrometer that employs a time-gated single photon avalanche diode array as a sensor is described. The spectrometer can also perform fluorescence spectroscopy and laser induced breakdown spectroscopy (LIBS). A laser is used to provide an excitation signal to excite a specimen of interest. A spectrometer is used to separate the various intensities over a range of wavelengths, which are then caused to impinge on the array to be recorded. The time-gated single photon avalanche diode array is triggered in synchrony with the excitation signal so as to allow time resolution of the response of the sample of interest to the excitation. The array can be time-gated to resolve signals that have shorter durations as a function of time while excluding signals that have a longer time duration. Raman and LIBS signals can be observed even from specimens that fluoresce strongly.
Owner:CALIFORNIA INST OF TECH
Laser-induced breakdown spectroscopy for specimen analysis
InactiveUS7092087B2Minimally traumaticRapid accurate diagnosisEmission spectroscopyRadiation pyrometryCancer cellTrace element
Owner:MISSISSIPPI STATE UNIVERSITY
Laser spectrum analyzer combining confocal micro-Raman spectrometer with laser-induced breakdown spectrometer
ActiveCN103743718AAchieve qualitativeRealize quantitative analysisRaman scatteringMicro imagingHigh resolution imaging
The invention provides a laser spectrum analyzer combining a confocal micro-Raman spectrometer with a laser-induced breakdown spectrometer (LIBS). The analyzer comprises a micro-Raman system, a micro LIBS system, a high resolution micro-imaging system, a confocal micro-light path, and a spectrum receiving system with a time resolution function, and automatically switches into a white light micro-imaging observation mode, an automatic focusing mode, a LIBS spectrum working mode, and a Raman spectrum working mode. The significant characteristics of the invention are that compact combination of Raman with LIBS is realized by a micro confocal system; qualitative and quantitative analysis of substance elements at the same minimal position and molecular structure is realized; with the high-resolution imaging function, element spatial discrimination and substance structure chemical analysis can be carried out in micrometers so as to obtain complete information of spatial distribution images of chemical elements, substance structure and physical conditions of a sample.
Owner:东莞市中科原子精密制造科技有限公司
Method and apparatus to laser ablation-laser induced breakdown spectroscopy
ActiveUS20120099103A1Easy to set upRadiation pyrometrySpectrum investigationLaser-induced breakdown spectroscopyLaser beams
Embodiments of the invention relate to a method and apparatus for analyzing a target material. Specific embodiments can be referred to as laser ablation laser-induced breakdown spectroscopy (LA-LIBS). Embodiments of the invention relate to the use of a first laser beam pulse incident on a target material to create an ablation event so as to produce an ablation plume of target material. Such ablation events can include, for example, plasma ablation, sub-plasma ablation, and thermal desorption. At least a portion of the ablation plume of target material can then be transported a sufficient distance away from the ablation event that a second laser beam pulse can interact with the at least a portion of the ablation plume of target material to create an analytical plasma such that the analytical plasma is uncoupled from the ablation event. The creation of the analytical plasma results in one or more elements of the at least a portion of the ablation plume of target material undergoing atomic emission, which can, optionally, be collected and analyzed.
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Practical laser induced breakdown spectroscopy unit
ActiveUS20080151241A1Easy to reachHigh energy consumptionRadiation pyrometrySpectrum investigationLaser-induced breakdown spectroscopyLaser beams
An apparatus for performing laser-induced breakdown spectroscopy comprises a handheld unit with a pump laser and a controller. A combination of a solid laser medium and a Q-switch receive a laser beam from said pump laser. Focusing optics focus laser pulses from said combination to a focal spot at a sample. Light collection optics collect light from plasma induced of sample material by focused laser pulses. A spectrometer receives collected light and produces information describing its spectral distribution. A power source delivers electric power to other parts of the apparatus. The pump laser, combination, focusing optics, light collection optics, spectrometer and power source are parts of said handheld unit.
Owner:HITACHI HIGH TECH ANALYTICAL SCI FINLAND OY
Measuring nutrients in plants and soils by laser induced breakdown spectroscopy
A process for analyzing the nutrient status of plant matter and / or soil for one or more nutrients selected from among calcium, potassium, nitrogen, sulfur, phosphorus, magnesium, chlorine, iron, boron, manganese, zinc, copper, nickel and molybdenum is described and includes contacting said plant matter and / or soil with a laser source capable of inducing breakdown of the sample whereby an emission from said sample occurs; and, analyzing said spectral emission for determination of an amount of said one or more nutrients. A process for analyzing the heavy metal content of plant matter and / or soil, or of fertilizers or soil amendments is also described.
Owner:LOS ALAMOS NATIONAL SECURITY
Genetic Neural NetworkQuantitative analysis method for laser induced breakdown spectroscopy based on gGenetic Neural Networkgenetic neural network
InactiveCN101915753AGuaranteed reliabilityAnalysis by material excitationNeural learning methodsGenetic algorithmLaser-induced breakdown spectroscopy
The invention belongs to a quantitative analysis method for a laser induced breakdown spectroscopy and particularly relates to the quantitative analysis method for the laser induced breakdown spectroscopy based on a gGenetic Neural Networkgenetic neural network. In an element quantitative detection technology based on the laser induced breakdown spectroscopy and the gGenetic Neural Networkgeneticneural network, laser-induced breakdown spectroscopy (LIBS) data are analyzed by combining an artificial neural network (ANN) with the genetic algorithm (GA for short) so as to realize the quantitative detection of elements. Compared with the traditional LIBS internal calibration method and the traditional BP(Back Propagation)-ANN method, the method has the advantages of little influence from the matrix effect, simple and quick process, avoidance of local convergence, high reliability of quantitative detection and the like.
Owner:ZHEJIANG NORMAL UNIVERSITY
High-Resolution Laser Induced Breakdown Spectroscopy Devices and Methods
InactiveUS20120206722A1Reduce signal to noise ratioSmall sizeRadiation pyrometrySpectrum investigationImage resolutionLaser-induced breakdown spectroscopy
Provided are laser induced breakdown spectroscopy (LIBS) devices. Embodiments of the devices are configured to obtain a spatial resolution of 10 μm or less. Also provided are methods of using the subject LIBS devices to determine whether one or more elements of interest are present in a target sample. The devices and methods find use in a variety of applications, e.g., submicron and nanoscale chemical analysis applications.
Owner:RGT UNIV OF CALIFORNIA
Integrated laser-induced enhanced plasma spectrum acquisition system
InactiveCN102841078AAccurate measurementIncrease production capacityAnalysis by material excitationLaser-induced breakdown spectroscopyHigh pressure
The invention relates to an integrated laser-induced enhanced plasma spectrum acquisition system and belongs to the field of laser plasma spectrum detection. The integrated laser-induced enhanced plasma spectrum acquisition system comprises a pulse laser device, a light beam lifter, a spectrometer, a domain limiting loop, a high voltage discharge electrode, an ICCD (Intensified Charge Coupled Device) camera, a focusing lens, a sample chamber, a reflector, an adjustable optical fiber optical receiving system, a sample to be detected, a three-dimensional electric control translation platform, an imaging CCD (Charge Coupled Device), a gas flow meter and a gas pressure meter. According to the integrated laser-induced enhanced plasma spectrum acquisition system, different LIBS (Laser-induced Breakdown Spectroscopy) signals are collected by utilizing control and synchronous control of internal environments of smaller independent sealed spaces so that integration is realized; a high voltage discharge enhanced and loop limited domain synchronous enhanced LIBS system with the functions of spectrum acquisition, dynamic image analysis and the like is integrated; and more accurate measurement are realized by utilizing environment stress around the sample and control of protection gas; and the system is quick and convenient, and is favorable for industrial production and application.
Owner:刘瑞斌
Practical laser induced breakdown spectroscopy unit
ActiveUS7394537B1High energy consumptionReduce energy consumptionEmission spectroscopyRadiation pyrometryLaser-induced breakdown spectroscopyLaser beams
An apparatus for performing laser-induced breakdown spectroscopy comprises a handheld unit with a pump laser and a controller. A combination of a solid laser medium and a Q-switch receive a laser beam from said pump laser. Focusing optics focus laser pulses from said combination to a focal spot at a sample. Light collection optics collect light from plasma induced of sample material by focused laser pulses. A spectrometer receives collected light and produces information describing its spectral distribution. A power source delivers electric power to other parts of the apparatus. The pump laser, combination, focusing optics, light collection optics, spectrometer and power source are parts of said handheld unit.
Owner:HITACHI HIGH TECH ANALYTICAL SCI FINLAND OY
System and method for quantitative analysis of the elemental composition of a material by laser-induced breakdown spectroscopy (LIBS)
ActiveUS20120029836A1Quick calculationShort calculation timeEmission spectroscopyAnalysis by thermal excitationElemental compositionChemical composition
A system and method for measuring elemental concentrations of a material from a sample containing several elements by LIBS analysis. The material is heated to generate plasma and its chemical composition is determined from spectral analysis of its radiation. The spectral lines of interest are identified among those emitted by the constituents of each element composing sample. The intensities of the spectral lined identified are measured. From an estimate of temperature, electron density and relative concentration values, the chemical composition of the plasma is calculated. The absorption coefficient according to wavelength is calculated for the spectral zones of the lines of interest. From an estimate of the plasma width, the spectral radiance of the plasma is calculated for the same spectral zones and then a comparison of the intensity and shape of the spectrum thus calculated with those of the spectrum measured is performed. These calculations and this comparison are repeated iteratively in order to adjust the temperature, electron density, relative values of the elemental concentrations and width of the plasma.
Owner:CENT NAT DE LA RECHERCHE SCI
Remote in-situ integrated test system for planet surface substances and atmosphere
ActiveCN103743719ARapid positioningReduce volumeRaman scatteringElectromagnetic wave reradiationContinuous lightElement analysis
The invention discloses a remote in-situ integrated test system for planet surface substances and atmosphere. The whole system comprises: a miniature pulse solid state laser, a Cassegrain telescope system, a one-dimensional precise mobile platform, a continuous light indicating positioning laser, various optical elements and echelle spectrographs, ICCD, a high-resolution camera and a photomultiplier. According to the system and method of the invention, the combination of technologies of laser induced breakdown spectroscopy (LIBS), Raman spectroscopy (Raman), and laser radar is realized in the same system; the system of the invention adopts modular design, is high in integration level, small in size, and light in weight, and can realize long-distance surface microimaging, long-distance substance element analysis, long-distance substance composition analysis, and planet boundary layer atmosphere detection.
Owner:东莞市中科原子精密制造科技有限公司
Combined Vibrational Spectroscopy And Laser Induced Breakdown Spectroscopy For Improved Mineralogical And Geochemical Characterization Of Petroleum Source Or Reservoir Rocks
InactiveUS20160349174A1Simple methodAnalysing solids using sonic/ultrasonic/infrasonic wavesComponent separationNon destructiveVibronic spectroscopy
A method for determining mineralogical or geochemistry of at least one geological sample with vibrational spectroscopy combined with laser-induced breakdown spectral measurements performed on the geological sample in a time variant manner with spectral acquisitions made after each of a plurality of measurement shots, spectral pre-processing performed as necessary, and subsequent analysis is applied to the collected data to determine at least one mineralogical or geochemistry parameter of the sample. The method can provide a rapid method to estimate mineralogy or geochemical parameters of a sample, which does not require sample preparation, and which can be non-destructive with respect to portions of the sample. A system for performing the method also is provided.
Owner:HALLIBURTON ENERGY SERVICES INC
Measurement apparatus and method for determining the material composition of a sample by combined X-ray fluorescence analysis and laser-induced breakdown spectroscopy
ActiveUS7233643B2Improve reliabilityReduce usageX-ray spectral distribution measurementMaterial analysis using wave/particle radiationChemical compositionX-ray
A measurement apparatus and method are provided for determining the material composition of a sample. An X-ray fluorescence detector (412) detects fluorescent X-rays coming from said sample under irradiation with incident X-rays. A laser source (301) is adapted to produce a laser beam. Focusing optics (302) focus said laser beam into a focal spot on a surface of said sample. An optical sensor (312) detects optical emissions coming from particles of said sample upon being exposed to said laser beam at said focal spot. A gas administration subsystem (104, 105, 106, 107, 108) is adapted to controllably deliver gas to a space (101) around said focal spot.
Owner:HITACHI HIGH TECH ANALYTICAL SCI FINLAND OY
Coal quality characteristic analysis method based on combination of dominant factors and partial least square method
ActiveCN103234944ASolve the problem of online rapid analysisHigh measurement accuracyAnalysis by material excitationLaser-induced breakdown spectroscopyTwo step
The invention discloses a coal quality characteristic analysis method based on combination of dominant factors and a partial least square method, and belongs to the technical field of atomic emission spectroscopy. According to the method, modeling is carried out based on a physical background of coal quality characteristics. The method comprises two steps of partial least square fitting processes. In the first partial least square fitting process, characteristic lines in a spectrum relative to coal quality characteristics are used as inputs, and a nonlinear dominant factor model is established for describing a physical relationship between coal quality characteristics and laser-induced breakdown spectroscopy. In the second partial least square fitting process, dominant factor residuals are corrected by using all spectral line intensity information of the spectrum. Compared with a traditional partial least square model, with the method provided by the invention, model calibration and prediction precisions are improved.
Owner:TSINGHUA UNIV
Automatic collection system of laser-induced breakdown spectroscopy
InactiveCN102364329ARealize automatic alignment functionThe degree of focus does not changeSpectrum investigationAnalysis by material excitationConstant powerCollection system
The invention relates to a novel analysis way in the spectrum analysis field, in particular to an automatic collection system of a laser-induced breakdown spectroscopy, which is characterized in that: a sample is moved through a movable platform, the height of the sample is estimated through the precise positioning of the laser, and the data are automatically collected. The automatic collection system has the advantages that: the automation of control and data collection of an experimental device is realized, so the labor investment can be greatly reduced, and the experiment is more convenient to carry out; an automatic aligning function of a laser ablation position can be realized, so a specific position to be ablated by the laser is conveniently known in advance, and the positioning function contributes to measuring a small-size sample; a distance of a focusing lens in the sample is locked, so the focusing degree of the laser can be maintained constant during the experimental process, and further the constant power density of the laser reaching the surface of the sample can be guaranteed; and the real-time monitoring of an optical detection device can substitute the situation that the sample is directly observed by the eyes during the experimental process, so the danger that the laser shoots the eyes can be avoided.
Owner:EAST CHINA NORMAL UNIV
Proximate analyzing method for coal quality base on multivariate linear regression
ActiveCN102313722AImprove resource utilizationImprove energy efficiencyAnalysis by material excitationProximateLaser-induced breakdown spectroscopy
The invention discloses a proximate analyzing method for coal quality base on multivariate linear regression, The invention is characterized in that a set of samples with known proximate analysis index values is used, plasma spectrum data is obtained by detection of a coal quality on-line analysis system of LIBS (Laser-Induced Breakdown Spectroscopy), the proximate analysis of fire coal samples to be measured by a multivariate linear regression correlation of each proximate analysis index value are respectively established, the characteristic spectral line strength which has substantial contribution to proximate analysis index values is respectively introduced through the established multivariate linear regression correlation to obtain the proximate analysis results. According to the invention, the spectral line information of correlative elements which has substantial contribution to each proximate analysis index is comprehensively utilized, the process for analyzing the index by fire coal proximate analyzed by the LIBS can be simplified, and the speed and the accuracy of the quantitative analysis can be raised.
Owner:SOUTH CHINA UNIV OF TECH +1
Bulk material sampling and laser targeting system
InactiveUS20130100444A1Emission spectroscopyRadiation pyrometryLaser-induced breakdown spectroscopyContinuous flow
A method is described for providing a continuous flow of a target material past a laser to enable repeated firings of the laser beam at the material in a controlled and uniform fashion. The objective is to provide a means to characterize the target material using laser induced breakdown spectroscopy. The method can be employed in a laboratory or field environment providing improved methods for characterizing in real time the properties of bulk materials.
Owner:CHESNER ENG P C
Fiber optic laser-induced breakdown spectroscopy device and methods of use
InactiveUS20050200843A1Minimally traumaticRapid accurate diagnosisEmission spectroscopyRadiation pyrometryFiberCancer cell
The present invention is directed to an apparatus, a system and a method for detecting the presence or absence of trace elements in a biological sample using Laser-Induced Breakdown Spectroscopy. The trace elements are used to develop a signature profile which is analyzed directly or compared with the known profile of a standard. In one aspect of the invention, the apparatus, system and method are used to detect malignant cancer cells in vivo.
Owner:MISSISSIPPI STATE UNIVERSITY
Spectrum detection system for material component analysis and detection method thereof
ActiveCN103076310ARealize analysisHigh detection sensitivityAnalysis by material excitationOptical probingPrincipal component analysis
The invention relates to the technical field of optical detection and provides a spectrum detection system for material component analysis and a detection method thereof. The spectrum detection system comprises a laser device, a spectrum signal collecting component, a light separating component and a material component analysis device with a door control function, wherein the laser device sequentially generates laser with at least two wavelengths and a synchronous signal; the spectrum signal collecting component collects an LIBS (laser-induced breakdown spectroscopy) signal and an RRS (retransmission request signal) spectrum signal which are generated after a sample to be analyzed is excited by two laser pulses respectively; the light separating component effectively separating the LIBS signal and the RRS spectrum signal with different wavelengths respectively; the material component analysis device with the door control function detects and receives the LIBS signal or the RRS spectrum signal separated by the light separating component according to the synchronous signal of the laser device and compares the existing spectrum information data to analyze the atom components and the molecule components of the sample so as to identify the components of the material. According to the invention, excitation, collection and detection of the LIBS signal and the RRS spectrum signal can be realized on one set of system by using single pulse laser, so that the atomic spectrum and the molecular spectrum of the material are obtained, and the components of the to-be-detected target containing various components or unknown components can be quantitatively analyzed.
Owner:深圳市光科健康科技有限公司
Underwater laser Raman spectrum/laser-induced breakdown spectroscopy combined detection device and method
The invention relates to an underwater spectrographic detection device combining a laser raman spectrum with a laser induced breakdown spectrum. The device comprises a raman host chamber with a window and an LIBS external hanging chamber which has a window and is connected by cables and an LIBS signal transmission front-end fiber (5), and can realize detection of underwater cation and anion at the same time. The raman host chamber is equipped with a continuous laser, a front optical circuit, a spectrograph, a detector and a power supply / control communication module which are connected by the cables and an ROV deck. The LIBS external hanging chamber is internally equipped with a double impulse laser and a front optical circuit, LIBS signals enter the spectrograph through the LIBS signal transmission front-end fiber (5), a coupling device and a fiber (7), the raman signals enter the spectrograph through the raman signal transmission fiber, and multi-spectrum joint detection or single spectrum detection is realized by a set sequential control. The joint detection device has small volume and low power consumption, can be used for different marine environment measurements in submersibles, and provides a detection way capable of acquiring overall information for marine chemical detection.
Owner:OCEAN UNIV OF CHINA
Detection time and position controllable laser induced breakdown spectroscopy detection device
ActiveCN102128815ALetter-to-back ratioGood for qualitative and quantitative detectionAnalysis by material excitationExcitation beamSoil heavy metals
The invention discloses a detection time and position controllable laser induced breakdown spectroscopy (LIBS) detection device, belongs to a technology for detecting metal elements in complex samples, and particularly relates to the technical field of soil heavy metal pollution element detection. The device is characterized in that: a fiber is axially vertical to a laser excitation beam and aligned with a plasma spark center position, the detection position is accurately adjusted through a one-dimensional platform in a range of below 5 millimeters, the device is provided with built-in LIBS acquisition control software for controlling the detection time, and the acquired spectrum has high signal-to-background ratio. The device has high working speed, and is simple in sample treatment, suitable for detecting multiple substances and convenient to carry.
Owner:TSINGHUA UNIV
Method for rapid detection of waste oil based on laser-induced breakdown spectroscopy
InactiveCN102519918ARealize in-situ online detectionApplicable to on-site evidence collection tasksAnalysis by material excitationAnalysis dataCollection system
The invention discloses a method for rapid detection of waste oil based on laser-induced breakdown spectroscopy. The method comprises the following steps that: step A, laser beams of a laser output system are focused on the surface of grease to be detected through lenses so as to allow the surface of the grease to be detected to form plasma plume and to glow; step B, laser-induced breakdown spectroscopic LIBS signals of the grease to be detected are transmitted to a spectrum measurement system through a signal collection system; step C, the spectrum measurement system compares measured spectroscopic data with laser-induced breakdown spectroscopic LIBS data of every element in a database, and information about varieties and contents of metal elements in the grease to be detected and analytical data of related information about contents of carbon, nitrogen, oxygen and compounds thereof are parsed according to spectral line positions and spectral line intensity; and step D, a computer system compares the analytical data with the data of a normal grease sample in the database so as to determine the quality of the detected grease sample.
Owner:DALIAN UNIV OF TECH
Single-light-source dual-wavelength LIBS (laser-induced breakdown spectroscopy) measurement device and method
InactiveCN103529000AHigh detection sensitivitySimple structureAnalysis by material excitationMeasurement deviceSpectrograph
The invention discloses a single-light-source dual-wavelength LIBS (laser-induced breakdown spectroscopy) measurement device and method. The device mainly comprises a pulsed laser device, a frequency multiplying crystal, a light splitter, a first total reflector, a second total reflector, a light shutter, a spectrograph and a synchronous delay controller, wherein laser generated by the pulsed laser device passes through the frequency multiplying crystal, and then is divided into fundamental frequency light and frequency multiplying light, and is irradiated to the light splitter; the frequency multiplying light is reflected by the first total reflector, and is vertically irradiated to the surface of a to-be-detected sample; the fundamental frequency light passes through the light shutter, then is reflected by the second total reflector, and then is irradiated above the surface of the to-be-detected sample by 1-5mm in parallel; spectrum signals generated by a plasma stimulated from the to-be-detected sample are converged to an optical fiber collecting head, and are transmitted to the spectrograph. The single-light-source dual-wavelength LIBS measurement device provided by the invention has the advantages of simple structure, compact volume and low price while achieving dual-pulse LIBS high detection sensitivity, and can be widely applied to the technical field of laser diagnosis and spectrum analysis.
Owner:XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
Method for on-line measurement of coal quality characteristics based on partial least squares method
ActiveCN102053083AOvercoming multiple dependenciesImprove forecast accuracyAnalysis by thermal excitationPrincipal component analysisLaser-induced breakdown spectroscopy
The invention provides a method for on-line measurement of coal quality characteristics based on partial least squares method. Firstly, the coal calibration samples containing known components are detected by use of an laser-induced breakdown spectroscopy (LIBS) system, the calibration samples are classified by the principal component analysis (PCA) or partial least squares-discriminant analysis (PLS-DA) method according to the obtained spectral line intensity matrix, and PLS regression equations of the individual classes of the calibration samples are established respectively; and then a sample to be tested is detected on line to obtain an LIBS spectrum, the type of the sample to be tested is judged by the PCA or PLS-DA method, and the spectral line intensity matrix of the LIBS spectrum is put into the PLS regression equation of the corresponding type to calculate the mass concentrations of individual elements in the sample to be tested. The method fully utilizes the effective information of the LIBS spectrum, eliminates the multiple correlation of spectral line intensity caused by the mutual interference of the elements, reduces the influence of the matrix effect, and is characterized by high goodness of fit, strong reproducibility and high prediction accuracy in comparison with the single-variable calibration method in the prior art.
Owner:TSINGHUA UNIV
Laser-induced breakdown spectrum in-situ analyzer
ActiveCN102221539AImprove analysis efficiencyEnhanced Analysis FunctionsAnalysis by material excitationOptical elementsBeam splittingLaser-induced breakdown spectroscopy
Owner:NCS TESTING TECH
Rock character judging method and system based on laser-induced breakdown spectroscopy
InactiveCN105938099AEfficient lithology identificationReliable lithology identificationAnalysis by thermal excitationLithologyWell drilling
The invention discloses a rock character judging method based on laser-induced breakdown spectroscopy (LIBS). According to the method, a laser-induced breakdown spectroscopy (LIBS) technology is used to establish a rock and / or rock debris element information prediction model based on a least square support vector machine; and the rock characters can be judged according to the element information prediction data of a rock and / or rock debris sample to be detected. The method has the characteristics of directness, rapidness, accuracy, and efficiency. The rock character judgment is accurate and efficient, especially for the logging rock debris powder under a high speed drilling condition, and the rock character judgment results are the same with those of drilling and coring. The invention also provides a system for the method mentioned above at the same time.
Owner:SICHUAN UNIV
Laser induced breakdown spectroscopy instrumentation for real-time elemental analysis
InactiveUS20120033212A1Radiation pyrometrySpectrum investigationElemental analysisLaser-induced breakdown spectroscopy
A backpack laser-induced breakdown spectroscopy LIBS system to provide rapid in-field elemental analysis of environmental samples important to the safeguarding of special nuclear materials.
Owner:LOS ALAMOS NATIONAL SECURITY
On-line in situ detecting method for infrared-ultraviolet double pulse laser induced breakdown spectroscopy
InactiveCN102507512ARealize fixed-point sampling detectionFlexible time optimizationAnalysis by material excitationSpectrographUltraviolet
The invention discloses an on-line in situ detecting method for an infrared-ultraviolet double pulse laser induced breakdown spectroscopy, which at least comprises the following steps of: A. setting a pulse delay time according to the sample excitation characteristics to control the time interval of two lasers; B. firstly outputting laser from an infrared waveband laser, long-distance collecting, adjusting and focusing on a position to be detected, and ablating the sample to generate plasma; C. outputting laser from an ultraviolet waveband laser after a delay time, long-distance collecting, adjusting and focusing on the same position, and exciting the plasma to reinforce a spectrum signal; D. receiving the spectrum signal through a long-distance spectrum collecting device, coupling the spectrum signal in an optical fiber, transmitting the spectrum signal to a spectrograph, and obtaining the spectrum data information through an assorted software; E. collecting the spectrum data, and obtaining a detection ingredient analysis result by a calibration-free correction analysis method.
Owner:DALIAN UNIV OF TECH
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