201 results about "Phase analysis" patented technology

An apparatus and method are disclosed for determining electrophoretic mobility using scattering light phase analysis comprising emitting a laser light along a path and transmitting a first portion of the laser light and reflecting a second portion of the laser light. The apparatus and method can also comprise deflecting one of the first and second portions of the laser in response to a drive signal, holding a sample to receive at least one of the first and second portions of the laser light under an electric field and output a composite light wave, outputting a photopulse signal based on the composite light wave, and measuring the electrophoretic mobility of the sample based on a phase shift analysis using cross-correlation of the photopulse signal with the drive signal.

The invention provides a foreign body detection method and system based on an impedance characteristic. The method comprises the steps that a detection coil is laid in an area to be detected, wherein the detection coil is connected with a capacitor element to form a resonant circuit, and a high frequency carrier signal is loaded on the resonant circuit; a resonant current signal on the resonant circuit is collected; other induction signals outside the frequency band of the high frequency carrier signal are filtered out; and finally, amplitude and phase analysis is carried out on the filtered resonant current signal to determine whether a foreign body is in the area to be detected. The method has the advantages that the impedance change of the detection coil is correspondingly acquired by detecting the change of the phase and amplitude of the resonant current signal, so as to judge whether a foreign matter exists. The method has the advantages of low cost and good effect. The original system is changed less. Especially for a wireless power transmission system, without affecting the efficiency of the original system, the method and system can be well adapted to foreign body detection in a variety of magnetic fields to improve the safety of the wireless power transmission system.

The invention discloses a GIS fault detection system and a GIS fault detection method based on multi-source information fusion and a deep learning network. The GIS fault detection system comprises a multi-source information acquisition and conditioning module, a deep learning module and an information fusion and fault reasoning module, wherein the multi-source information acquisition and conditioning module performs fault state monitoring on a GIS system by adopting a partial discharge time analysis method, a partial discharge phase analysis method and an ultrahigh frequency method separately, extracts corresponding feature vectors separately from obtained current, voltage and electromagnetic information and outputs the feature vectors to the deep learning module; the deep learning module performs online pattern recognition on the three kinds of feature vectors based on the deep learning network obtained through offline learning optimization to acquire corresponding recognition results, and outputs the recognition conclusions to the information fusion and fault reasoning module; and the information fusion and fault reasoning module carries out fusion processing on the three recognition conclusions to obtain a fault feature matrix, and then obtains a fault conclusion by means of a CLIPS reasoning machine. By adopting the GIS fault detection system and the GIS fault detection method, the fault information of the GIS system can be diagnosed quickly, efficiently and precisely.

An improved method of fluid analysis in the borehole of a well. A fluid sampling tool is fitted with a pumpout module that can be used to draw fluids from the formation, circulate them through the instrument, and then expel this fluid to the borehole. It has been determined that certain measurements would be most valuable to implement down hole, such as the formation fluid bubble point and dew point. Accurate bubble point and dew point measurements are made by forming bubbles or a liquid drop in a measured sample, and detecting same.

Methods and systems providing for characterizing turbine blades, including characterizing the dynamics of one or more turbine blades or stages of a stage in terms of natural frequencies, normalized response intensity, and/or stage modal shape or nodal configuration. Such methods and systems comprise fluid (e.g., oil) excitation of bladed disks and quantitative modeling of the fluid excitation. Additionally or alternatively, such methods and systems may provide for analyzing modal shape or nodal configuration of a bladed disk (e.g., a turbine stage) based on a phase analysis of strain signals acquired from a bladed disk subjected to a fluid excitation, wherein the modal shape or nodal configuration corresponds to modes of blades coupled through a disc or shrouding.

Provided is a method for preparing a transmission electron microscope thin film sample of a longitudinal section of a filament by the electrolysis double-spray method and belongs to the transmission electron microscope sample preparation field. By utilization of the electrolysis double-spray method and aperture samples with a diameter of 3.0 mm, longitudinal section thin films of filament samples with a diameter of 1.0 mm are prepared successfully, and the structure analysis and second phase analysis are performed by utilization of a transmission electron microscope. The samples are prepared after steps of cutting, grinding, clamping, adjustment of beams, electrolysis double-spray and cleaning. The method is advantaged in that two sides of the longitudinal section of a filament sample are polished and thinned by an electrolysis double-spray instrument at the same time, the polishing and thinning time is only 10 s-2 min, and the structure and secondary phase can be obtained accurately. The method reduces the use of parts of sample preparation devices, reduces the cost, and raises the sample preparation efficiency and success rate.

The electrical energy meter comprises following modules: the switching module for sampling voltages and currents in electrical network, the module for detecting open/short circuit of the current transformer, the module for measuring electrical energy, the harmonic analysis module, the amplitude analysis module, the phase analysis module, the judgement module of intelligent fault analysis, the data recording module, the stats display module, the data communication module, the clock module, the power source module and the parameter setting module. The invention realizes the integrated functions of measuring electrical energy, the network data transmission and the network communication basically. It is the all-electric type energy meter with various usages.

The invention relates to a coal gangue phase analysis method based on an energy dispersion X-ray spectrum. The method includes the specific steps of firstly, analyzing the chemical composition of coal gangue through chemical analysis or X-ray spectrofluorimetry; secondly, analyzing the mineral composition of coal gangue through X-ray diffraction; thirdly, determining types of elements where energy spectrum face distribution images need to be collected; fourthly, shooting backscattered electron images and element energy spectrum face distribution images of coal gangue, and analyzing and observing composition of main phases through energy spectrum points; fifthly, designing a phase analysis method, comprehensively processing the energy spectrum distribution images of all the elements in the same area, removing noise in the analysis result, and obtaining split phase pseudocolor images and the phase analysis result of coal gangue. The phase analysis method can be used for type analysis, volume percentage content calculation and space distribution observation in coal gangue and activated coal gangue. The method is effective for both the crystalline state phase and the amorphous state phase, and is sensitive to the low-content phase.

A method for detecting small cracks and other anomalies on parts having complex geometries is disclosed. The method includes eddy current inspection incorporating collection of data from multi-frequency eddy current signals. Phase analysis is used to combine the multi-frequency data to enhance the signal to noise ratio of the raw inspection image. The image is then reprocessed using a spatiotemporal filter to correlate with the frequency components of the eddy current flaw signal to separate signals associated with cracks and other flaws at edges that would ordinarily be hidden by edge effect signals.

The invention relates to an analysis method used for determining dominant lithogenous phase in tight oil and gas reservoir exploration and development processes, and especially relates to a method used for obtaining the dominant lithogenous phase and predicting lithogenous phase space distribution and oil gas energy production by subjecting lithological characters, physical properties, oiliness and the lithogenous phase of microfacies sections of sand bodies of the core to correlation analysis, and statistics on lithogenous phase type and relative amount of the lithogenous phase. The core analysis method is used for solving a problem that prediction on tight oil favorable reservoir with low resource abundance is difficult to realize because that existing lithogenous phase analysis technology can only be matched with conventional oil and gas data. The analysis method on tight oil reservoir dominant lithogenous phase is accurate, possesses practicability, and is convenient for popularization. According to the core analysis method, macroscopic description on core samples and microcosmic determination are combined, so that determination and cause representation on reservoir performance of the tight oil and gas reservoir dominant lithogenous phase can be realized with high accuracy.

The present invention discloses a system and method for vibration analysis and phase analysis of vibration waveforms using dynamic statistical averaging of tachometer data to accurately calculate rotational speed. Vibration analysis is performed on a machine having a variable frequency drive by using a tachometer to monitor rotational speed of the drive shaft and a logic device to calculate speed parameters associated with the drive shaft using the tachometer data. The speed parameters include a maximum speed, a minimum speed, and an average speed of the drive shaft. By correlating the vibration spectra of the motor drive with the speed parameters, machine faults can be identified based upon the energy distribution in the spectra. Further, vibration waveforms from two or more locations on the machine can be sequentially acquired through synchronous triggering by using a pulse edge of a stable tachometer signal. The waveforms can be compared to determine a phase difference to help in identifying any machine faults that may be present.

An analytical method for determining crystallographic phases of a measuring sample comprises the steps of acquiring a diffraction pattern of the measuring sample and qualitative phase analysis of the measured diffraction pattern, acquiring an element spectrum of the measuring sample and determining concentrations of chemical elements in the measuring sample from the acquired element spectrum, and carrying out a quantitative phase analysis of the measuring sample on the basis of the measured intensities of the acquired diffraction pattern thereby taking into consideration determined element concentrations as a boundary condition, wherein differences between calculated and measured intensities of the diffraction pattern and between calculated and determined element concentrations are simultaneously minimized in an iterative process. The inventive method permits quantitative phase determination with high reliability.

A method for inspecting an internal cavity in a part is provided. The method includes inserting a probe into the internal cavity. The method also includes controlling movement of the probe using a defined scan path to scan the probe over a region of interest in the internal cavity. The method also includes applying multiple multifrequency excitation signals to the probe to generate a number of multifrequency response signals. The multifrequency excitation signals are applied at multiple positions within the internal cavity. The method further includes performing a multifrequency phase analysis on the multifrequency response signals to inspect the internal cavity.

The invention provides a kit for detecting perchlorate ions in a food. The kit comprises a perchlorate standard solution, a <18>O labeled perchlorate ion solution, an acetic acid solution, acetonitrile, an ammonium acetate solution and a solid phase extraction C18 column. The invention also provides a method for detecting the perchlorate ions in the food. The method comprises the following steps: 1, extracting a sample; 2, purifying; and 3, carrying out accurate qualitative and quantitative treatment by adopting a reverse phase analysis process with a high separating ability and a high signal-to-noise ratio. The kit adopts the acetic acid solution as a sample extraction solvent; the adoption of the solid phase extraction column to purity realizes a good recovery rate and a good purification effect; and the kit and the method adopt a soft ionization technology to detect and an internal standard method to quantify in order to realize high selectivity, high sensitivity and wide application range, have extremely high specificity, and can be widely applied to detect the perchlorate ions in the food.

A method for inspecting a part is provided. The method includes applying a number of multifrequency excitation signals to a probe to generate a number of multifrequency response signals for the part being inspected. The method further includes performing a multifrequency phase analysis on the multifrequency response signals to inspect a subsurface of the part. An inspection system is provided and includes an eddy current (EC) probe configured to induce eddy currents in a part. The system further includes an eddy current instrument coupled to the EC probe and configured to apply multifrequency excitation signals to the EC probe to generate multifrequency response signals. The system further includes a processor configured to analyze the multifrequency response signals from the EC instrument by performing a multifrequency phase analysis, to inspect a subsurface of the part.

The invention relates to qualitative and quantitative analysis for X-ray diffraction mineral. Wherein, the X-ray diffraction phase analysis sample bracket comprises a silicon single-crystal piece in the following base frame, a base frame, and a dust-carry film stuck on said single-piece; the single-crystal piece is single diffraction peak, and is prepared by cutting into pieces along the crystal face 0-12Deg and grinding and polishing. This invention can eliminate the effect to measurement accuracy from device, time and parameter, simplifies operation, and cuts time to improve efficiency.

An apparatus and a method capable of measuring large deformation with a high accuracy and dynamically, using speckle interference, utilizes an optical path where one laser beam out of two laser beams becomes non-collimated light and a plane parallel transparent plate, and can form carrier fringes. More specifically, the transparent plate is arranged on the optical path where the non-collimated light is formed, or is removed from the optical path, or a refractive index, or a thickness of the transparent plate arranged on the optical path, or a tilt angle relative to an optical axis is changed. The phase analysis can be performed from fringe images corresponding to the deformation, by performing repetitively the above-described processing and acquisition of the speckle interference pattern.

According to the invention, a powder catalytic material Nd<3-x>CoxNbO7 (x being greater than or equal to 0.5 and less than or equal to 1) is prepared by adopting a supercritical hydrosynthesis method and a chemical vapor condensation and deposition method; a composite porous nanometer catalytic material Nd<3-x>CoxNbO7 (x being greater than or equal to 0.5 and less than or equal to 1) -zincosilicate molecular sieve is prepared by adopting an impregnating and baking method; and a novel photoelectrode Nd<3-x>CoxNbO7 (x being greater than or equal to 0.5 and less than or equal to 1) is prepared. The three novel materials are represented: tissue morphology analysis is performed by a transmission electron microscopy, and results show that catalyst particles are irregular in shape, with the average particle size of 150 nm; phase analysis is performed by an X-ray diffractometer, and results show that Nd2CoNbO7 has a single phase, and relatively high crystallinity; the chemical speciation of the surface of the catalyst and the elementary composition of a microcell as well as the structural characteristics of an electronic shell are discussed by an X-ray photoelectron spectroscopy; and a characteristic absorption edge of the Nd2CoNbO7 is determined by a UV-Vis diffuse reflection spectroscopy to obtain the band gap width of the Nd2CoNbO7 which is 2.412 eV. Finally, the catalyst is used for decomposing water to produce hydrogen, and carrying out catalytic degradation on organic pollutants such as microcystic toxins, methylene blue and sulfamethoxazole in a water body under visible light. Experimental results show that the catalyst prepared according to the invention is good in catalytic effect.

The invention discloses a MHC completion database, and an establishment method and application thereof. The MHC completion database comprises a genotype dataset, a HLA typing type dataset, an amino acid changing information dataset, and a HLA haplotype dataset combined together. In the establishment process of the database, LD and HWE are used for the first time for filtering a variation result, and data accuracy is improved. A simple method which is easy to operate is used to obtain SNP distinguishing datasets in least number, and MHC haplotype information is obtained through phasing analysis. Compared with using the whole SNP dataset to perform phasing, the establishment method saves more time, and reduces CPU and memory use, and obtained haplotype information is more accurate. The MHC completion database comprises various datasets in a MHC region, and can effectively complete sites, and lays foundation for deep research of the MHC region.