14 results about "Plasma spectroscopy" patented technology

The invention relates to the technical field of metal material structure display, in particular to a DD432 alloy structure display method which comprises the following steps: S1, pretreating the surface of a DD432 alloy sample to obtain a to-be-detected surface; s2, scanning the surface of the sample by adopting a laser-induced plasma spectrum technology, and continuously controlling a laser beam scanning path by utilizing a three-dimensional mobile platform; s3, plasma emission spectrum data are collected, and characteristic spectral lines of Ni, Cr, Co, Mo, Al and Ti elements are identified; s4, converting the spectral data into structure characteristic information of grain size, precipitated phase distribution and grain boundary morphology through a machine learning algorithm; and S5, reconstructing a microstructure image based on the microstructure feature information. According to the method provided by the invention, the LIBS technology is adopted, complicated sample pretreatment is not needed, tissue information can be quickly obtained, and the sample is not damaged.

The present disclosure discloses a device for detecting substances in a liquid to be tested using plasma spectroscopy, including an electrode, at least a portion of which is configured to be disposed in the liquid to be tested and is suitable to contact the liquid to be tested, the electrode being suitable to generate a plasma in the liquid to be tested by applying an external voltage, wherein the plasma is located in a bubble generated by the external voltage; a light detector, configured to detect the emission spectrum generated by the plasma in the bubble, wherein the light detector is an optical fiber, and there is no focusing element between the light detector and the plasma.

The present invention relates to a method and associated system for characterizing biological particles in aerosol form (i.e., suspended in an ambient gas) using laser-induced plasma spectroscopy, comprising the steps of: a) collecting (Ea) the ambient gas containing the biological particles intended to be characterized; b) generating (Eb) a jet of said particles (JAB) in a vacuum chamber (CH); c) transmitting a laser beam (FL) in the form of pulses and focusing the laser beam in the vacuum chamber (CH) transversely to the propagation direction of the jet of particles (JP) so as to capture in a focusing volume (VF) the laser beam (FL) and at least one individual particle (N) of the jet. P ), wherein the plasma sends other particles that are specific to the interaction between the laser beam and individual particles of the jet; d) collecting the particles sent by the plasma (Ed); and e) performing spectroscopic analysis of said particles (Ee) to ultimately characterize the biological particles.

A detection device and method for sunlight-induced excitation spectrum. The detection device includes a Fresnel lens, a focusing lens, a chopper, a photoelectric sensor, a collection mirror, an optical fiber, a spectrometer, and a computer. The focusing lens is located below the Fresnel lens, a chopper is located behind the focusing lens, and the photoelectric sensor is located on the chopper. The collection mirror and the photoelectric sensor are spaced apart. The collection mirror is connected to one end of the optical fiber, and the other end of the optical fiber is connected to the spectrometer. The spectrometer is connected to the computer. The present invention uses sunlight as an excitation source to achieve plasma excitation of the object to be tested, and utilizes plasma spectroscopy to analyze the type and elemental composition of the object to be tested. This facilitates the realization of a low-cost and low-energy component detection device, and is convenient for field testing. In addition, the present invention also provides a detection method for the detection device.

The invention provides a de-noising method and a de-noising system for laser-induced plasma spectroscopy (LIBS), and provides an improved de-noising method aiming at the problem that the analysis accuracy of weak characteristic peaks of the laser-induced plasma spectroscopy (LIBS) is easily interfered by noise. According to a polynomial fitting method, a least square method and a Savitzky-Golay method in a traditional method, effective information in an original signal is easily distorted, so that a weak characteristic peak is lost, and a false peak appears; according to a traditional Fourier transform method, it is assumed that a signal is a global stationary signal, but in practical application, an LIBS signal is usually a non-stationary signal, and the problem of noise and signal confusion occurs. Aiming at the technical problem, the invention provides an improved discrete wavelet transform (DWT) denoising method, which ensures that the peak pattern of a weak characteristic peak is reserved while the noise interference is effectively removed.

This invention discloses an online boron concentration detection system and method for nuclear power plants. The system includes: a sample introduction module for pretreating a boron-containing aqueous sample to obtain a sample aerosol, and delivering the sample aerosol to the reaction end; a microwave plasma torch generation module for receiving the sample aerosol delivered by the sample introduction module and forming a high-temperature microwave plasma torch through microwave field coupling, then generating a characteristic spectrum through the high-temperature microwave plasma torch; and a characteristic spectrum identification and concentration detection module for acquiring the characteristic spectrum and performing qualitative identification and quantitative calculation to obtain the corresponding boron element concentration data. This invention, by employing microwave-induced plasma spectroscopy technology, enables accurate online analysis of boron concentration in liquid samples, thereby improving the detection accuracy and efficiency of boron.

The invention relates to a device for quantitatively detecting salt deposits on a metal surface by means of laser-induced plasma spectroscopy. The invention also relates to a method for uniformly applying salts to a metal surface (13) or for producing a reference metal surface. The invention further relates to the use of laser-induced plasma spectroscopy for quantitatively detecting salt deposits on a metal surface and the use of a corresponding device for carrying out laser-induced plasma spectroscopy for quantitatively detecting salt deposits on a metal surface.

The invention discloses a self-adaptive laser welding system for a TOPCon-0BB assembly, relates to the technical field of photovoltaic assembly manufacturing, and ensures the cleanliness and consistency of the surface before welding through real-time detection of the thickness of an oxide layer on the surface of a copper solder strip and dynamic adjustment of pretreatment power. Therefore, the absorption efficiency of laser energy is improved, and welding defects such as pseudo soldering and over-welding caused by uneven surface pollution are avoided from the source, so that the metallurgical quality and reliability of a welding joint are remarkably improved, and the long-term stability of an assembly is ensured; according to the invention, metal active state on-line monitoring based on plasma spectrum analysis is innovatively introduced, and dynamic feedback is combined with a preprocessed surface absorption efficiency parameter, so that a dual-feedback adaptive control model is constructed; therefore, the problem of inconsistent welding quality caused by uncertain factors such as material batches and environmental fluctuation is fundamentally solved.

The present disclosure provides an apparatus and system for measuring substances in a liquid under test by means of plasma spectroscopy. The apparatus comprises: an electrode, at least a part of which is adapted to be arranged in a liquid under test and is adapted to be in contact with said liquid, the electrode being adapted to generate plasma in said liquid by means of an applied voltage, wherein the plasma is located in bubbles generated by the applied voltage; and an optical detection element, which is adapted to detect an emission spectrum generated by the plasma in the bubbles, wherein the optical detection element is an optical fiber, and there is no light converging element between the optical detection element and the plasma.

The name of the invention is sodium antimonate for plasma spectrometry detection and a preparation method of a hydrate solution sample of the sodium antimonate. Belongs to the technical field of trace impurity element detection. The method mainly solves the problems of tedious detection means, low dissolution efficiency, easy introduction of impurities and influence on sample detection accuracy in the existing method. The method mainly comprises the following steps: (1) weighing uniformly ground sodium antimonate or sodium antimonate hydrate into a plastic container which can be heated in a closed manner, and then adding hydrofluoric acid and hydrochloric acid or / and nitric acid into the container; (2) sealing a container filled with sodium antimonate or sodium antimonate hydrate, hydrofluoric acid and hydrochloric acid or / and nitric acid, heating at low temperature to completely dissolve the sample, cooling to room temperature, transferring to a volumetric flask, diluting to the scale, and shaking uniformly to obtain a sodium antimonate or sodium antimonate hydrate solution to be detected. The method has the characteristics of small reagent dosage, high dissolution efficiency, low salinity and low spectral background, and is mainly used for determining trace impurity elements contained in sodium antimonate and hydrates thereof.

The application discloses an improved asymmetric plasma spectrum analysis method, considers a diatomic dissociation process correction part standard temperature method curve result, and is higher in precision in diatomic gas calculation; adopts radiation intensity calculation instead of an emission coefficient, reduces a process of reconstructing an emission coefficient distribution model, is more convenient in calculation, avoids calculation deviation caused by reconstruction model error, simultaneously expands the application range of the method, and is not limited by an inverse transformation method; converts two relative emission coefficient curve intersection points into a relative emission coefficient ratio to determine plasma composition, and compensates for error caused by radiation intensity instead of the emission coefficient. Meanwhile, the concentration calculation can be extended to the case that the relative emission coefficient of the plasma center is greater than 1.

This invention relates to the field of real-time fly ash detection, and particularly to a method and apparatus for detecting the carbon content of fly ash based on pulsed discharge plasma spectroscopy. The method includes: setting up collection points; performing detection at the collection points and selecting several collection points as detection points based on the detection results; performing staggered detection of particles at the detection points within an alternating cycle to obtain the detection results at each detection point; identifying abnormal points among the detection points and correcting the detection results for these abnormal points; and determining the carbon content of the fly ash based on the detection results of all detection points. This invention utilizes a laser to excite particles in the fly ash into plasma at the detection points, and detects the carbon content by acquiring and analyzing the characteristic spectrum of carbon and extracting the characteristic light intensity of carbon. This invention, through reasonable selection of detection points, makes the final data more reasonable, avoids data distortion, and solves the problem of inaccurate detection results.

The invention provides a device and a system for detecting substances in liquid to be detected through plasma spectrum, the device comprises an electrode, at least one part of the electrode is suitable for being configured in the liquid to be detected and is suitable for being in contact with the liquid to be detected, the electrode is suitable for generating plasma in the liquid to be detected through external voltage, the plasma is located in bubbles generated by external voltage; and the light detection part is suitable for detecting a light-emitting spectrum generated by the plasma in the bubbles, the light detection part is an optical fiber, and no light condensing element is arranged between the light detection part and the plasma. According to the invention, when the to-be-detected liquid is subjected to external voltage to generate plasmas and bubbles, the luminescent spectrum signals of the plasmas can be effectively and completely collected, so that effective and accurate analysis and detection results of various substances in the to-be-detected liquid can be obtained.