53 results about "Plasma spectroscopy" patented technology

A method comprising the following steps: (a) providing a turbine component comprising a metal substrate having an external surface; and (b) analyzing the external surface by laser plasma spectroscopy to determine whether a metallic coating is present on or absent from the external surface. If a metallic coating is determined to be present on the external surface, the elemental composition, elemental concentration and/or thickness of the metallic coating present on the external surface may be determined (qualitatively and/or quantitatively) by laser plasma spectroscopy. Another method comprises the following steps: (a) providing a turbine component comprising a metal substrate having an external surface which has been subjected to treatment to remove a metallic coating applied to the external surface; and (b) analyzing the treated external surface by laser plasma spectroscopy to determine the degree of removal of the metallic coating from the treated external surface.

An in-situ laser plasma spectroscopy (LPS) system for automated near real-time elemental depth profiling of a target including: an optical source configured to generate an optical beam, wherein the optical beam is pulsed; an optical probe system configured to deliver the optical beam from the optical source to a surface of a target to generate an ablation plasma; a time resolved spectral detection system configured to generate time resolved spectral data from emission signals from the ablation plasma; and a data acquisition and processing system configured to acquire the time resolved spectral data to determine, in combination with predetermined calibration data, an absolute elemental concentration as a function of depth in near real-time.

A system and method for performing laser plasma spectroscopy on a surface of a component, particularly to detect, analyze, and determine the extent of deposit build up on turbomachine components protected by coatings that are susceptible to damage from infiltration of deposits. The system includes a laser energy source and a probe interconnected with the laser energy source to receive a laser beam therefrom and then direct the laser beam onto the surface of the component and scan an area of the surface while the component remains stationary. The probe is further configured to collect radiation emitted from a laser-induced plasma generated by the laser beam at the surface of the component. The system is further equipped to transmit the radiation from the probe and spectrally analyze the radiation.

The invention relates to the technical field of industrial automatic measurement, and provides an online detection system of element content of industrial solid powder, aiming at solving the problems that the commonly used detection method cannot meet the requirement on fast and real-time online detection of contents of multiple elements in industrial solid powder, and the LIPS (Laser Induced Plasma Spectroscopy) technology is not applied to online detection of contents of elements in industrial solid powder successfully. The online detection system of element content of industrial solid powder comprises a sampling channel, a measurement room, an LIPS detector, a correction device, a sample discharging channel and a working gas generator for supplying gas for the whole detection system, and realizes application of the LIPS technology in online detection of elements in industrial solid powder by a reasonable and compact structure. Proved by experiments, the detection system provided by the invention can detect multiple elements in the industrial solid powder online rapidly in real time so as to guide workers to adjust the production condition in time to improve the production efficiency.

The invention relates to a calibration method and a calibration device and a method and a device for measuring equivalent ratio of combustible gas to oxidant, in particular to a calibration method and a calibration device based on laser induced plasma spectroscopy and a method and a device for measuring equivalent ratio of combustible gas to oxidant, aiming at improving the calibration accuracy of the existing calibration method, improving the measuring accuracy of the equivalent ratio of fuel to oxidant in the existing combustion system and improving the convenience in measurement of equivalent ratio of mixed fuel gas. Since plasma fluorescence signal intensity is high, the signal-to-noise ratio is high and the response sensitivity of an ICCD (intensified charge coupled device) which is used as light signal receiving equipment in a spectrograph is high, the measuring accuracy of the method provided by the invention is higher than the measuring accuracy of other existing equivalent ratio measuring method. Since the method is a non-contact measuring method, laser beam and fluorescence signal receiving equipment are not limited by spatial positions and the signals are convenient and rapid to process at a later stage, the method can satisfy the requirement on real-time online measurement. The technical scheme is suitable for the calibration method and the calibration device based on laser induced plasma spectroscopy and the measurement of equivalent ratio of combustible gas to oxidant.

The invention discloses a system and method for analysis of Martian mineral components by using double multiplexing laser spectrum. The system includes an optical head, a short wavelength spectrometer, a medium wave spectrometer, a long wavelength spectrometer, a calibration board bracket, a calibration board, a pointing mirror bracket, a two-dimensional pointing mirror, a two-dimensional rotation control component, a pointing mirror control cable and a load controller. Based on the system, the combined detection of atom and molecular can be achieved by combined detection of laser induced plasma spectroscopy and laser Raman spectroscopy. The invention provides a double multiplexing laser spectrum detection system and method; a same pulse laser source and three frequency multiplication modules are used to realize the multiplexing of light sources; and short, middle and long wave spectrometers in the same length and the corresponding spectrum ICCD area array detectors are used to achieve the multiplexing of beam split and spectral detection. In addition, remote micro area imaging and laser self-focusing function are achieved to share a main optical path. The invention effectively expands the scope of Martian mineral analysis, and the system is compact and convenient, reduces the fluorescence interference and improves the comprehensiveness of molecular detection.

A method for testing the surface hardness of a composite insulating material comprises the following steps: S1, preparing a composite insulating material sample, of which the surface hardness is measured; S2, irradiating the surface of the composite insulating material sample by pulse laser beams and by a laser-induced breakdown spectroscopy (LIBS) method, and catching the laser-induced plasma spectroscopy of the surface; S3, establishing a functional relationship between a ratio of an ionic line to an atomic line of a selected element in the laser-induced plasma spectroscopy and the surface hardness value; S4, irradiating the surface of a to-be-tested composite insulating material by pulse laser beams and by the LIBS method, and catching the laser-induced plasma spectroscopy of the surface; and S5, determining the surface hardness of the to-be-tested composite insulating material according to the laser-induced plasma spectroscopy obtained in the step S4 and on the basis of the functional relationship between the ratio of the ionic line to the atomic line and the surface hardness value. By the method, the composite insulating material can be subjected to remote and electriferous on-site test, so that the accurate surface hardness of the composite insulating layer can be obtained quickly.

The invention provides an electron cyclotron resource ion source, in particular relates to a novel structured all-permanent magnet high-current electron cyclotron resonance (ECR) ion source capable of directly observing internal discharge of an ion source. In the electron cyclotron resource ion source, quartz glass with high light transmission is adopted as a discharge chamber; microwave leakage caused by the quartz glass can be shielded by a special structured metal shell which is arranged outside the quartz glass and provided with a window; and a magnetic field required by electron cyclotron is generated by a plurality of separated permanent magnetic rings, and a plurality of gaps are formed among the rings. Therefore, through the window of a shielding shell, gaps among the permanent magnetic rings and the transmitting quartz glass, the whole process occurring in the discharge chamber and various states of plasma can be observed in real time uninterruptedly at a plurality of angles in a plurality of positions, and diagnostic study on plasma spectrometry can be developed uninterruptedly.

The invention relates to method of sample solution when using plasma spectroscopy method to measure aluminum alloying composition. The method first place solid aluminum alloying samples in the plastic container, then add enough non-oxidative strong acid solution to plastic container and make the strong acid and aluminum alloying samples fully contact, there are bubbles generate in the mixtures in the plastic container, until no bubbles generate then drop nitric acid and hydrofluoric acid aqueous solutions to the compound mixture until solid aluminum alloying samples all dissolve, stewing to make the solution clarified then dilute to calibration volume and shake to uniform then the aluminum alloying sample solution will be obtained; or stewing to make the solution clarified, after the after treatment then dilute to calibration volume and shake to uniform then the aluminum alloying sample solution will be obtained. The aluminum alloying samples solution made by the method of this invention are of low salinity, low spectral background and easy to measure trace impurity elements.

The invention provides a cement raw meal three moduli measuring method based on partial least squares, relating to a method for detecting material components by laser induced plasma spectroscopy. The method comprises the following steps: firstly detecting cement raw meal calibration samples with known components by adopting an LIBS system and building calibration models of element concentration ratio and characteristic spectrum line intensity ratio by utilizing a spectrum standardization method according to the obtained characteristic spectrum line intensity; then carrying out online detection on the samples to be detected and obtaining LIBS spectra, judging the element concentration ratio through the regression results and then determining the three moduli of cement raw meal by substituting the spectrum line information obtained through measurement into the built calibration models. The method has the effects of taking full advantage of the spectrum line information obtained by the LIBS spectra, considering the influence of the interference elements on the measuring results and reducing the interference of matrix effects and has the characteristics of good goodness of fit, strong repeatability and high prediction accuracy compared with traditional univariate calibration methods.

A spectroscopy system for spectro-chemical analysis of a sample includes a plasma torch (50) for generating a microwave induced plasma (90) as a spectroscopic source. The plasma forming gas is nitrogen which can contain an oxygen impurity. Thus the system includes a nitrogen generator (70) which is preferably supplied with compressed atmospheric air from a compressor (75) for oxygen to be removed from the air by adsorption. The invention allows the use of an on-site nitrogen gas generator and thus gives cost savings because the need to obtain supplies of bottled high purity gas is eliminated.

The invention belongs to the technical fields of spectral analysis and detection method, and specifically relates to a uniform substance based laser induced breakdown spectroscopy correction method. Because the environment of an industrial site is bad and there are many dusts, the optical elements (especially the optical transceiving windows contacted with the external environment) of an optical detection system used in a laser induced breakdown spectroscopy technology (LIBS) are easily polluted by the dusts; the excitation light power and fluorescence collection efficiency are reduced, and thus the error of the detection results is large. According to the method, the plasma spectroscopy of a uniform substance is used to correct the element characteristic emission lines in the plasma spectroscopy of a sample so as to inverse the strength of element characteristic emission lines under a pollution-free situation, and thus the influence of dusts on the measurement precision of LIBS can be effectively corrected. By combining the provided correction method and a conventional optical dustproof method, the maintenance period of LIBS detection equipment is largely prolonged.

The invention relates to a device and method for detecting soil heavy mental by utilizing electromagnetic heating and plasma spectroscopy, and solves the technical problems that the process of detecting heavy metal in soil is inconvenient to operate, the detection efficiency is low, the speed is slow and field rapid detection cannot be realized in the prior art. The device for detecting the soil heavy mental by utilizing the electromagnetic heating and plasma spectroscopy provided by the invention comprises an electromagnetic heating device, a plasma atomic emission spectrometer device, a gaspath system and a battery; the electromagnetic heating device comprises a heating pipe; the heating pipe is a hollow pipe structure, two ends of which are opened; one end of the heating pipe is a circular cone, the conical tip of which is outward; furthermore, one end of the heating pipe is in smooth transition connection with the first gas inlet of a main pipe; the other end of the heating pipe is sealed through a sealing plug; a gas inlet is arranged on the side wall of the heating pipe; an electromagnetic induction coil is wound on the outer side wall of the heating pipe; a metal sample boat is also fixedly arranged in the heating pipe, on which the electromagnetic induction coil is wound; and simultaneously, the method thereof is also provided. The device and the method in the invention are widely used in the technical field of soil heavy metal spectroanalysis.

The disclosure provides plasma spectroscopy analysis methods using a preparatory process of adding a control metal species that is different from an analyte metal species to a sample so as to have a known concentration; a concentration process of introducing the sample to a measurement container, and applying an electric current across a pair of electrodes disposed in the measurement container to concentrate the analyte metal species and the control metal species in the sample in a vicinity of at least one of the electrodes; a detection process; a correction process; and a quantification process.

An online detection method for dissolved gas in transformer oil, which can qualitatively analyze dissolved gas in transformer oil based on the real-time laser-induced plasma and laser Raman spectral characteristics of the gas separated from transformer oil. Carry out laser transmission and signal collection, the device is portable, through the time-sharing sharing of light transmission fiber and signal collection fiber, and sharing other optical components in the spectrum analyzer except the Rayleigh filter, the number and volume of the system components are reduced, saving energy cost, and can overcome the shortcomings of traditional off-line measurement methods that cannot be measured in real time.

The name of the present invention is a method for dissolving magnesium metaphosphate by plasma spectrometry. It belongs to the technical field of plasma detection of magnesium metaphosphate. It mainlysolves the problem that the existing method has a complicated procedure and the sample solution contains a relatively high concentration of salt. Its main features are: (img file='DEST_PATH_IMAGE001.TIF' wi='19' he='24'/) placing the magnesium metaphosphate powder sample into a dry beaker, adding enough concentrated perchloric acid and thick Sulfuric acid; (img file='645275DEST_PATH_IMAGE002.TIF'wi='19' he='23'/) then heating at low temperature, slightly boiling to clear, cooling, diluting to the mark and shaking, to obtain the magnesium metaphosphate test sample solution. According to the method for dissolving magnesium metaphosphate by plasma spectroscopy, the magnesium metaphosphate sample solution prepared by the method of the invention has low salt content, small spectral backgroundand is suitable for measuring trace impurity elements in magnesium metaphosphate.