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30 results about "Attenuation coefficient" patented technology
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The linear attenuation coefficient, attenuation coefficient, or narrow-beam attenuation coefficient characterizes how easily a volume of material can be penetrated by a beam of light, sound, particles, or other energy or matter. A large attenuation coefficient means that the beam is quickly "attenuated" (weakened) as it passes through the medium, and a small attenuation coefficient means that the medium is relatively transparent to the beam. The SI unit of attenuation coefficient is the reciprocal metre (m⁻¹). Extinction coefficient is an old term for this quantity but is still used in meteorology and climatology. Most commonly, the quantity measures the number of downward e-foldings of the original intensity that will be had as the energy passes through a unit (e.g. one meter) thickness of material, so that an attenuation coefficient of 1 m⁻¹ means that after passing through 1 metre, the radiation will be reduced by a factor of e, and for material with a coefficient of 2 m⁻¹, it will be reduced twice by e, or e². Other measures may use a different factor than e, such as the decadic attenuation coefficient below. The broad-beam attenuation coefficient counts forward-scattered radiation as transmitted rather than attenuated, and is more applicable to radiation shielding.
A method and apparatus, system, storage medium for extracting scholte wave attenuation coefficients
PendingCN122151185ASeismic signal processingSeismology for water-covered areasAttenuation coefficientScholte wave
The application discloses a method and device for extracting Scholte wave attenuation coefficients, a system and a storage medium, and comprises the following steps: collecting seabed seismic data of an observation area; obtaining a pretreated common-receiver gather based on the seabed seismic data of the observation area; based on the CRG gather data in the SU format pretreated by the seabed seismograph, using high-resolution forward and inverse transformation, separating and extracting the base-order CRG gather with energy focusing and single order from the CRG gather coupled and stacked by multiple-order Scholte waves; based on the base-order CRG seismic gather, calculating the attenuation coefficients of any two gathers, and after the cyclic calculation of all gather pairs is completed, the average attenuation coefficient model corresponding to the gather pair is obtained. By using the technical scheme of the application, the Scholte wave dispersion order can be accurately separated, and the base-order attenuation coefficient can be specially extracted.
Owner:INSTITUTE OF GEOLOGY AND GEOPHYSICS CHINESE ACADEMY OF SCIENCES
A condensation and sedimentation system for zinc powder purification
The application belongs to the technical field of zinc powder purification, and provides a condensation and sedimentation system for zinc powder purification, which comprises the following steps: collecting a time sequence of original radiation intensity of a condensation chamber, performing frequency spectrum analysis through fast Fourier transform, calculating energy values of high and low frequency band frequency domain signals, solving a signal coherence factor and calculating a transmittance attenuation coefficient, constructing a metal thin film radiation compensation model based on a long short-term memory network, inputting the attenuation coefficient and the time sequence of original radiation intensity to output a corrected real temperature of the condensation chamber, expanding an inference layer of a full connection neural network structure, outputting a calibrated attenuation coefficient through the inference layer, selecting an effective attenuation coefficient input model by comparing a deviation threshold value, dynamically responding to temperature measurement nonlinear attenuation caused by zinc film deposition, guaranteeing production continuity and product quality of zinc powder purification, adapting to industrial multi-working condition operation requirements, being convenient to operate and controllable in cost.
Owner:JIANGSU TIANCHENG ZINC TECH CO LTD
Visible light communication channel modeling method for underground coal mine environment
This invention discloses a visible light communication channel modeling method for underground coal mine environments, solving the problem that existing technologies fail to accurately quantify the impact of coal mine dust and obstacles on the attenuation of received optical power. The method includes: determining the link parameters of the visible light communication system, simulation parameters of the environment, and simulation parameters of the transmitter and receiver; calculating the attenuation coefficient of received optical power due to coal mine dust and obstacles; calculating the channel impulse response and characteristic parameters; determining the noise simulation parameters of the photodetector; and calculating the bit error rate of the communication system. This invention quantifies the impact of coal mine dust and obstacles on the channel, integrating the attenuation coefficient of received optical power due to coal mine dust and obstacles into the channel model, resulting in a visible light communication channel model that better reflects the underground coal mine environment. This invention enriches the modeling methods for visible light communication channels, and the modeling results provide guidance for the design and deployment of visible light communication systems in underground coal mine environments.
Owner:中煤能源研究院有限责任公司 +1
Ultrasonic spectrum cross-scale particle size distribution detection method, system, device and storage medium
The application discloses an ultrasonic spectrum cross-scale particle size distribution detection method and system, which comprises the following steps: generating multiple groups of burst sound emission signals with different frequency ranges based on a pre-constructed linear frequency modulation signal constraint; sequentially exciting multiple transducers to emit ultrasonic waves and receive ultrasonic waves passing through a liquid to be detected; recording the received signals passing through pure water and the liquid to be detected; calculating the amplitude information and the attenuation coefficient of the received signal waveform at multiple different frequencies; constructing the attenuation coefficient at different frequencies and forming an observation matrix G; combining a coupled phase model HT and a BLBL analog optical absorption law to construct a theoretical model matrix A; performing inversion by calculating the following formula: AF=G, to obtain a solid-liquid two-phase medium particle size distribution F. By combining multiple groups of transducers with different frequency bands into an array, wideband detection from several kHz to several tens of MHz is realized, and finally the particle size scale range is from several microns to several millimeters, which is suitable for the detection requirements of high and low volume concentration particle size distribution.
Owner:长三角国创超声(上海)有限公司 +3
Radiation image processing device, radiation image processing method, and radiation image processing program
A processor acquires a first radiation image and a second radiation image, which are acquired by imaging a subject with radiation having different energy distributions, derives a body thickness of the subject based on at least one of the first radiation image or the second radiation image, specifies a soft region of the subject in the first radiation image and the second radiation image, derives a first attenuation coefficient and a second attenuation coefficient, which correspond to the body thickness in the soft region, for each of the first radiation image and the second radiation image, and derives an attenuation ratio, which is a ratio according to the body thickness between the first attenuation coefficient and the second attenuation coefficient, as an indicator representing a quality of the radiation.
Owner:FUJIFILM CORP
A phase deflecting imaging system, method, electronic device and storage medium
The application provides a phase deflectometry imaging system, method, electronic device and storage medium, and relates to the field of optical measurement. The system comprises a projection light source module for projecting a composite color sinusoidal fringe pattern onto the surface of a measured object; a prism camera for separating monochromatic light images of different colors; and an upper computer control and processing module for calculating the linear polarization degree of the monochromatic light images according to light intensity information of different polarization directions, determining the high-reflectivity area of the surface of the measured object based on a preset polarization threshold and the linear polarization degree; calculating the light intensity attenuation coefficient of the high-reflectivity area based on the total light intensity of the monochromatic light images and a preset pixel saturation threshold, and adjusting the projection intensity of the composite color sinusoidal fringe pattern according to the light intensity attenuation coefficient. Thus, the sample is simultaneously illuminated by fringe patterns of multiple wavelengths, and the projection intensity of the high-reflectivity area is adjusted by collecting multi-angle polarization fringe images, so that the measurement speed and accuracy of the phase deflectometry on the high-reflectivity object are improved.
Owner:HEFEI I TEK OPTOELECTRONICS CO LTD
A Visualized and Precise Positioning and Retrieval Method and System for Falling Objects in Wells
This application relates to the field of visual retrieval technology, specifically to a method and system for visually and precisely locating and retrieving objects fallen into a well. The method includes: acquiring an image of the fallen object as the target image; determining the contour points of the target image based on the degree of circularity and grayscale; identifying abnormal contour points based on the gradient values of the contour points moving away from the light source; and for different clusters, determining the light intensity attenuation coefficient by combining the dispersion and mean of the gradient values with the distance to the abnormal contour points; determining the image difference contribution by the matching degree of adjacent images and the proportion of the light intensity attenuation coefficient; determining the deviation degree by the color ratio difference between the target image pixels and adjacent pixels, and then calculating a multidimensional noise interference index by combining the light intensity attenuation anomaly degree and the image difference contribution; enhancing the image using the multidimensional noise interference index, and identifying the fallen object to complete the retrieval. This application improves the denoising effect and detail preservation capability of images of fallen objects in wells.
Owner:DAQING RUNHAI TECH DEV
A multi-dispersed laser system and method of controlling the same
The application relates to the technical field of laser data transmission, and provides a multi-dispersion laser system and a control method thereof. The control method of the multi-dispersion laser system comprises the following steps: establishing a first model and a second model; in an initial state, adjusting a pumping power of a pumping light source, combining a first attenuation coefficient, a second attenuation coefficient and the first model to determine a first target pulse interval and a first target power; combining the second attenuation coefficient being zero and the second model to determine a second target power, a second target pulse interval and a target attenuation coefficient; controlling the real-time pumping power to be the first target power, the first real-time attenuation coefficient to be zero, the second real-time attenuation coefficient to be zero, the first laser to be in a first state and the second laser to be in a third state; the third state comprises a dissipative soliton state; controlling the real-time pumping power to be the second target power, the first real-time attenuation coefficient to be the target attenuation coefficient, the second real-time attenuation coefficient to be zero, the first laser to be in the first state and the second laser to be in a second state.
Owner:LASER RES INST OF SHANDONG ACAD OF SCI
A deep learning-based intelligent defect detection system for superalloys
PendingCN122262783AOptimize contrast signal-to-noise ratioAchieve deep adaptationBiological modelsMaterial flaws investigationSingle crystalSuperalloy
The application relates to the technical field of intelligent sensors, in particular to a high-temperature alloy defect intelligent detection system based on deep learning, which comprises the following steps: obtaining a CAD model of a blade to be detected, a linear attenuation coefficient and crystallization temperature field data, constructing a three-dimensional equivalent thickness matrix and a stress distribution probability field, utilizing a multi-agent reinforcement learning model to adaptively decide X-ray energy, detection gain and infrared excitation frequency, realizing deep adaptation of detection parameters and non-uniform attenuation characteristics of components, constructing a physical reference gray field based on the Beer-Lambert law, stripping a complex geometric structure background and extracting a defect sensitive area through residual operation, synchronously fusing an infrared temperature rise abnormal signal, and physically removing grain structure noise of a single crystal structure in combination with a pixel shift law under microbeam deflection, so that accurate and quantitative output of a defect type, three-dimensional coordinates and size is finally realized. Through multimodal fusion and adaptive decision, the application realizes accurate determination and quantification of defects of complex components.
Owner:JIANGSU SINAGRT MATERIALS TECH CO LTD
A submarine cable defect detection method and device based on multi-modal perception spatial correlation
The application relates to a submarine cable defect detection method and device based on multi-modal perception space correlation, which comprises the following steps: synchronously acquiring submarine cable observation data by using an underwater detection platform, preprocessing the submarine cable observation data, and correlating the submarine cable observation data through a three-dimensional space transformation matrix; adopting a residual network as a backbone network, performing multi-scale fusion through a feature pyramid network structure, and acquiring fusion features; in the multi-scale fusion, a water quality prior parameter is introduced as a gate factor to adjust feature weights, and the water quality prior parameter comprises a light attenuation coefficient of a current water area and a sonar signal-to-noise ratio; the fusion features are input into a pre-trained target detection head, the submarine cable defect category and a bounding box are acquired, laser ranging information is combined, the actual physical size of the defect is calculated according to a pinhole camera model, and submarine cable defect three-dimensional detection results are output, so that submarine cable defect detection is completed. Compared with the prior art, the application realizes automatic identification of submarine cable defects in a complex underwater environment and is suitable for underwater submarine cable defect detection tasks.
Owner:TONGJI UNIV
Method and system for predicting attenuation coefficient of 532 nm laser in sea-spray layer
PendingCN122154578AMaterial analysis by optical meansDesign optimisation/simulationAttenuation coefficientAtmospheric sciences
The present application relates to the technical field of 532nm laser attenuation coefficient prediction, and provides a method and system for predicting the 532nm laser attenuation coefficient of a sea surface spray layer, which comprises the following steps: calculating the sea surface roughness length according to the wind speed at any height above the sea surface; calculating the wind speed at a specified height above the sea surface based on the wind speed at any height above the sea surface and the sea surface roughness length; constructing an attenuation coefficient prediction model based on the integrated unified sea surface spray generation function and Mie scattering theory, and substituting the wind speed at the specified height above the sea surface in a preset numerical range into the attenuation coefficient prediction model to calculate the attenuation coefficient of the 532nm laser propagating in the near-sea surface spray layer. The present application can realize high-precision and convenient prediction of the 532nm laser attenuation coefficient under all sea conditions, and provides support for offshore laser detection, communication and other engineering applications.
Owner:NAVAL UNIV OF ENG PLA
A wireless networking yard lamp cluster intelligent control method and system
The present application relates to the field of intelligent control, in particular to a kind of wireless networking's yard lamp cluster intelligent control method and system, method includes: neighbor detection, signal strength is collected multiple times, eliminate anomaly and adaptively extend window to stabilize average intensity;Distance is estimated using path loss model of calibration or default parameter, and neighbor is divided into three levels of near, middle distance, long distance according to threshold value.Trigger response, trigger message carrying level label is received, coarse estimate relative azimuth is obtained using the strength difference table of orthogonal polarization double antenna, and brightness attenuation coefficient and guide correction delay are generated combining level difference and azimuth to make the minimum delay in front, exceed the maximum linkage order and do not light, drive luminaire according to parameter and smooth attenuation to long distance edge node boundary.The present application suppresses signal strength fluctuation, suppresses level stroboscopic, realizes direction perception using orthogonal polarization antenna, makes linkage diffusion direction and direction of travel consistent, and realizes smooth directional lighting.
Owner:NINGBO ROYALUX LIGHTING CO LTD
Method for evaluating transparency of skin
PCT designated stageWO2026105699A1SensorsDiagnostic recording/measuringAttenuation coefficientPhoto irradiation
The present invention relates to a method for evaluating the transparency of skin, the method comprising irradiating evaluation skin with irradiation light and quantifying, by simulation, the amount of irradiation light that has reached a specific penetration depth. The simulation is based on the intensity of reflected light and uses the attenuation coefficient of the skin and the albedo of the skin.
Owner:ROHTO PHARM CO LTD +1
Mine gas concentration dynamic analysis method and system
PendingCN122259419AEliminate air chamber response delay errorColor/spectral properties measurementsFluid speed measurementAttenuation coefficientAir velocity
The present application relates to the technical field of gas concentration analysis, in particular to a mine gas concentration dynamic analysis method and system, comprising the following steps: collecting air flow fluctuation parameters, extracting air speed change vector, mapping concentration frequency electrical signal, constructing disturbance topology graph, extracting flow resistance attenuation coefficient, calculating lag time constant, performing phase compensation translation on the electrical signal to generate waveform front time sequence, using light spot distortion parameter to calculate actual optical path attenuation parameter, and comparing output dynamic concentration value. In the present application, the concentration time sequence inversion logic of the air flow coupling feature is introduced, the dynamic air flow parameter is fitted with the interference fringe parameter to construct a pressure coupling matrix, the gradient compensation is carried out according to the cross section air resistance coefficient to eliminate the gas chamber response delay error, the micro dust light spot distortion parameter is extracted to establish the inverse analysis relationship between the turbidity and the attenuation index, and the light path detection reference is compensated and calibrated to output continuous concentration distribution coordinates.
Owner:LULIANG UNIV
A high-precision calibration method for a hyperspectral lidar for photon counting
The application discloses a high-precision calibration method for a hyperspectral laser radar for photon counting, belongs to the technical field of laser radars, and comprises two stages of spectral calibration and radiation calibration; the spectral calibration is based on monochromator wavelength-by-wavelength scanning and synchronous measurement of a beam splitter to extract spectral response parameters of each channel; the radiation calibration strictly decouples a detection link, extracts an effective attenuation coefficient of water in situ by using a slope method, and combines an air white plate benchmark and a window transmittance to perform full-link radiation correction, and inversely calculates target intrinsic spectral reflectivity which is stripped of interference. The application can be used for data correction, target accurate classification and identification and high-fidelity quantitative detection of the hyperspectral laser radar for photon counting, and solves the problem that original signals produce serious spectral distortion due to non-uniform energy of a light source of the hyperspectral laser radar and complex scattering and absorption of water.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
A method for target recognition in slaughtering scenes based on multi-source visual feature fusion
PendingCN122135405ABiometric pattern recognitionManufacturing computing systemsPattern recognitionAttenuation coefficient
This invention relates to the field of multi-source visual feature fusion technology and discloses a target recognition method for slaughtering scenes based on multi-source visual feature fusion. The method includes: acquiring a first feature tensor of a visible light image and a second feature tensor of an infrared image; calculating the local statistical variance of the second feature tensor and determining the attenuation coefficient; adjusting the feature sampling span and correcting the spatial mapping of the first feature tensor according to the attenuation coefficient; calculating the spatial entropy of the first and second feature tensors to generate a modal mask and assigning weights to each feature tensor; decoupling the feature space using a preset orthogonal mapping matrix; fusing the decoupled features and outputting the recognition result. This invention utilizes infrared modal statistical deviation to characterize the scattering intensity of the medium, thereby adaptively adjusting the feature receptive field, eliminating texture diffusion caused by high concentrations of water vapor, and ensuring robustness of target boundary recognition under extreme conditions.
Owner:BEIJING ZHIWEI YOUPIN TECH CO LTD
A Laser-Induced Breakdown Spectral Correction Method and System Based on Energy Level Radiation Attenuation
ActiveCN116380874BImprove Quantitative Analysis CapabilitiesNuclear energy generationAnalysis by thermal excitationAttenuation coefficientTemporal resolution
This disclosure belongs to the field of laser-induced breakdown spectroscopy technology, specifically relating to a laser-induced breakdown spectral correction method and system based on energy level radiation attenuation. The method includes: acquiring the temporal resolution spectrum of a calibration sample; determining a correction spectral line of the calibration sample based on the acquired temporal resolution spectrum; calculating the energy level radiation attenuation coefficient of the selected correction spectral line based on its temporal resolution spectral line intensity; and correcting the spectral line intensity of the acquired temporal resolution spectrum of the calibration sample based on the obtained energy level radiation attenuation coefficient of the calibration sample's correction spectral line, thereby completing the laser-induced breakdown spectral correction. This embodiment calculates the energy level radiation attenuation rate, correcting the repeatability problems caused by the uncertainty of the energy level radiation attenuation rate within the laser-induced plasma and the uncertainty of radiation attenuation within the integration time, thus improving measurement accuracy.
Owner:SHANDONG UNIV
A method for correcting in-situ measurement of low-frequency sound attenuation coefficient in seabed sediment and related device
This application discloses an in-situ measurement and correction method and related apparatus for the low-frequency acoustic attenuation coefficient of seabed sediments, relating to the field of seabed sediment acoustic detection technology. The method includes acquiring in-situ measurement data and sample test data, and calculating the sediment sound velocity at each frequency; calculating the transmission voltage response of the transmitting transducer at each frequency in seawater and the receiving sensitivity of the receiving transducer at each frequency in seawater, and calculating the transmission voltage response of the transmitting transducer at each frequency in the sediment and the receiving sensitivity of the receiving transducer at each frequency in the sediment; calculating the total correction factor for each frequency based on the above transmission voltage response and receiving sensitivity; and calculating the corrected acoustic attenuation coefficient of seabed sediments at each frequency based on the total correction factor and the acoustic waveform amplitude. This application significantly improves the measurement accuracy and reliability of the low-frequency acoustic attenuation coefficient of seabed sediments.
Owner:FIRST INSTITUTE OF OCEANOGRAPHY MNR +1
An online real-time UV energy monitoring system for an automated UV coating line
PendingCN122084099AImprove adaptabilityGuaranteed stabilityPhotometry using electric radiation detectorsAttenuation coefficientUV curing
This invention belongs to the field of UV monitoring technology. It provides an online real-time UV energy monitoring system for automated UV coating lines, comprising: a data acquisition module that collects instantaneous raw UV energy values and VOCs concentration values around the detection window; a composite deposition characteristic quantity calculation module that obtains dimensionless characteristic quantities characterizing the degree of window contamination through product and time integration operations; an attenuation compensation model construction module that analyzes the correlation between the characteristic quantities and the transmission attenuation coefficient, and establishes a linear or nonlinear compensation model; and a true UV energy value correction module that calculates the true UV energy value to eliminate the influence of window attenuation through a preset formula. This invention can achieve accurate compensation for window contamination attenuation, avoid monitoring distortion, ensure the stability of the UV curing process, improve the consistency of the finished coating, has a simple structure, is easy to implement, and is suitable for precision monitoring scenarios in various automated UV coating lines.
Owner:ZHEJIANG UVLINE MACHINERY CO LTD
Dry-type transformer temperature rise and partial discharge cooperative monitoring device
PendingCN122109752ATesting dielectric strengthThermometers using physical/chemical changesAttenuation coefficientFluorescence
The present application relates to the field of power equipment online monitoring and photoelectric sensing technology, in particular to a dry-type transformer temperature rise and partial discharge cooperative monitoring device; the device comprises photoelectric sensing, absolute temperature calculation, stiffness compensation conversion, decoupling and state mapping and dynamic parameter adjustment modules; the system extracts fluorescence decay time constant and envelope broadening parameter by capturing interference light, solves winding absolute temperature and dynamically adjusts detection parameter; the core is to deduce elastic modulus attenuation coefficient by using absolute temperature, to perform division softening compensation on the broadening parameter, so as to restore the real partial microscopic thermal stress distribution and discharge energy equivalent; the present application effectively offsets the physical attenuation of ultrasonic signals caused by high temperature softening, separates the temperature cross-sensitivity error, and solves the problem that a single structure is difficult to reflect the influence of insulation softening on signal propagation path.
Owner:一览众山(厦门)电力技术有限公司
Spiral compression starting and sound-light early warning method with throw-in opening closing linkage infrared sensor detecting garbage amount
The present application relates to the technical field of intelligent garbage collection equipment, and discloses a spiral compression starting and sound-light early warning method for detecting garbage amount by a throw-in opening closing linkage infrared sensor, wherein the method comprises: after the throw-in opening is closed, driving the infrared sensor to perform double-waveband calibration pulse emission, matching a pollution type discrimination interval table based on the ratio of two waveband attenuation coefficients, obtaining a dominant pollution type label and a differentiated compensation weight; generating a garbage height sampling value time sequence when performing weighted fusion compensation on a plurality of original distance data; performing piecewise linear fitting on the sequence, determining a settling completion state by using the last segment settling rate value, and outputting a stable garbage height value; generating a compression starting instruction after comparing with a compression starting threshold value; and when detecting a jam during the compression process, performing reverse rotation according to the axial position partition matching differentiated escape parameters, and outputting a state prompt through a sound-light device.
Owner:JIANGSU MAO INTELLIGENT ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Mechanical arm laser processing process control method and system based on laser signal feedback
This invention belongs to the field of laser precision machining and robot control technology, and relates to a method and system for controlling the laser machining process of a robotic arm based on laser signal feedback. The method simultaneously acquires coaxial photoelectric detection signals of the molten pool, joint coding data, and theoretical interpolation coordinates. By transforming the spectrum of the detection signals and filtering out plume radiation interference, geometric parameters characterizing the shape evolution of the molten pool are obtained. The spatial vector difference between the physical coordinates of the machining head and the theoretical interpolation coordinates is calculated to determine the transient tracking error and map it to obtain a power attenuation coefficient. This coefficient is used to reduce the transient laser output power in real time, physically aligning the real-time laser energy density with the actual movement speed of the robotic arm's end effector. By establishing a physical constraint on the energy output to mechanical servo hysteresis, this invention solves the time scale mismatch problem between microsecond-level photoelectric response and millisecond-level mechanical response, effectively eliminating local heat accumulation on the machining path and maintaining the steady state of the molten pool.
Owner:WUXI CHAOQIANGWEIYE TECH CO LTD
Method for measuring phase fraction of multiphase fluid based on non-radiative recombination quantum light source
PendingCN122238381AMaterial analysis by transmitting radiationAttenuation coefficientScattering cross-section
This invention discloses a method for measuring the phase fraction of multiphase fluids based on a non-radiative composite quantum light source, relating to the field of online metering technology for complex multiphase flows in industry. The method includes: S1 Static calibration to obtain the number of quantum projections in oil, gas, water, sand, and fluid-free states; S2 Calibration to obtain the photoelectric effect cross section and Compton scattering cross section at various energies; S3 The multiphase fluid flows through a throttling structure, allowing quantum light to penetrate the multiphase fluid and collecting the number of transmitted quantum projections; S4 Constructing a quantum cross section function relationship equation; S5 Constructing a nonlinear equation set; S6 Solving to obtain the mass phase fraction of each phase. Based on the quantum phase fraction measurement principle of the photoelectric effect and the difference in Compton scattering cross section, this method overcomes the technical limitations of traditional attenuation coefficients, achieving a mass phase fraction measurement accuracy of ±0.1%. The relative errors in mass flow rate measurement for each phase are ±7.5% for gas, ±5% for liquid, and ±3.5% for solid, significantly better than traditional dual-energy gamma metering technology, meeting the requirements of refined production in oil and gas fields and precise control of drilling and fracturing.
Owner:CHENGDU SEA PIONEERS TECHNOLOGY CO LTD +1
A method for detecting explosives based on spectroscopy
The present application relates to the field of explosive identification and detection, and relates to an explosive identification and detection method based on spectral technology. The present application obtains the actual temperature difference and the heating rate of each point on the surface of the package to be detected and the background in real time, identifies the thermal anomaly area, and analyzes the thermal response coefficient. A preset low-energy test pulse laser is emitted to the thermal anomaly area, the peak intensity attenuation coefficient of the candidate characteristic peak in the first Raman spectrum sequence is obtained, the thermal effect sensitive coefficient is calculated by combining the temperature change amount of the abnormal area, the pulse energy of the formal laser is adjusted, the half-height width and the peak position offset amount of the candidate characteristic peak in each frame spectrum in the second Raman spectrum sequence are obtained, the thermal effect sensitive coefficient and the thermal response coefficient are compensated based on the thermal effect sensitive coefficient and the thermal response coefficient, the final half-height width and the peak position are obtained, the matching factor of the final half-height width and the peak position and the reference characteristic peak parameter of the explosive is calculated, whether the explosive exists is judged, if the explosive exists, the explosive category is output, and the detection accuracy is improved.
Owner:山东承势电子科技有限公司
A method and analyzer for analyzing color saturation of high wear-resistant water-based decorative paper
The present application relates to the field of color saturation analysis, and relates to a high-wear-resistance water-based decorative paper color saturation analysis method and analyzer. The present application carries out color zoning on the to-be-tested sample through the standard design drawing of the to-be-tested sample, selects multiple collection points, obtains the glossiness of each collection point through double-plane optical measurement, dynamically adjusts the light trap absorption area of the spectrophotometer, respectively collects the first reflection spectrum and the second reflection spectrum of each collection point, identifies the fluorescence interference wavelength point in combination with the system calibration deviation rate, determines the fluorescence decay coefficient in combination with the glossiness of the collection point, obtains the fluorescence correction reflectivity of each wavelength point, and thus obtains the color saturation. Based on the color saturation and the distribution position of each collection point, the saturation abnormal points are identified. Based on the effective fluorescence interference amount of the fluorescence characteristic band and the reference band, the fluorescence spectrum characteristics of each saturation abnormal point are analyzed, the abnormal reasons of the saturation abnormal points are analyzed, and the efficiency of production quality control is improved.
Owner:LINYI HUATE DECORATIVE MATERIALS CO LTD
Thickness measurement method, system, and electronic device
This application relates to the field of nuclear power technology and provides a thickness measurement method, system, and electronic equipment, including: acquiring a background radiation signal transmitted by a detector and determining the background radiation intensity based on the background radiation signal; acquiring a first ray signal transmitted by the detector and determining a first ray intensity based on the first ray signal; acquiring a second ray signal transmitted by the detector and determining a second ray intensity based on the second ray signal; acquiring the linear attenuation coefficient of the object being measured; and determining the thickness of the object being measured based on the background radiation intensity, the first ray intensity, the second ray intensity, and the linear attenuation coefficient of the object being measured. This method helps to improve the accuracy of the determined thickness of the object being measured.
Owner:CHINA GENERAL NUCLEAR POWER OPERATION
Scattering medium fiber and speckle spectrometer
ActiveCN117331165BCladded optical fibreColor/spectral properties measurementsAttenuation coefficientOptical spectrometer
The present application relates to a kind of scattering medium optical fiber and speckle spectrometer.The scattering medium optical fiber includes optical fiber body and scattering medium, the scattering medium is coated on the surface of part of the optical fiber body, or, the scattering medium is connected in the extension direction of the end of the optical fiber body;The scattering medium includes two or more scattering regions in the propagation direction of optical path, the light attenuation coefficient of each scattering region is different, and the difference between the maximum light attenuation coefficient and the minimum light attenuation coefficient is 2dB / mm-60dB / mm.The scattering medium in the present application sets scattering region with different light attenuation coefficients on the optical path of incident light, realizes the spectral regulation of different regions, and separates light of different wavelengths in space.Further, using the scattering medium optical fiber of the present application in speckle spectrometer, through the idea of hierarchical spectral random regulation, the randomness of speckle pattern is enhanced, the excellent spectral resolution performance is achieved while realizing the miniaturization of spectrometer, and cost is reduced.
Owner:ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
An under-ice UUV homing and recovery method based on light source detection and positioning
The present application belongs to the technical field of UUV under-ice guidance and recovery, and particularly relates to a UUV under-ice guidance and recovery method based on light source detection and positioning. The present application collects images of a light source array by an under-ice UUV, adjusts the heading of the UUV and makes it vertically float upwards when all the light sources are continuously detected and the UUV is located at the array center position of the light sources, thereby realizing under-ice guidance and recovery. The present application designs a simple environment color restorer, adopts an improved gray world algorithm, compensates according to different attenuation coefficients of light with different frequencies under water, enhances the contrast of light sources and background, and avoids color distortion of underwater light source images. The present application designs a lightweight underwater small target light source detection network, and through improvements such as reducing convolution layers, adding an improved attention mechanism, and adopting a new activation function module, the detection performance of light source type targets is significantly improved.
Owner:HARBIN ENG UNIV
A method and system for analyzing the pumpability of geopolymer concrete
The application provides a geopolymer concrete pumpability analysis method and system, and relates to the technical field of geopolymer concrete pumpability analysis; the application sets a measuring pipe section on a pumping pipeline, and real-time collection of ultrasonic sound velocity and main frequency attenuation coefficient constitutes a two-dimensional joint characteristic value sequence; the application generates a calibrated health voiceprint baseline by weighting and fusing the real-time data on site with preset prior knowledge, and compensates by using the real-time temperature of the slurry; in the pumping process, the application continuously calculates an instability evolution index reflecting the deviation of the slurry from the stable state, and compares the index with two-stage early warning thresholds to determine the pumpability. The application adopts a dynamic baseline calibration mode of weighting and fusing the real-time waveform on site with preset waveform templates, effectively solves the problem that the fixed baseline is easy to fail in the traditional method, and further fuses the multi-dimensional acoustic characteristics with the dynamic calibration baseline, so that the early instability evolution of the internal structure of the slurry can be sensitively captured.
Owner:GUANGDONG GUANGWU METAL IND GRP CORP LTD