315 results about "Ir absorption" patented technology

The invention discloses a ppb-grade methane gas online detection method, equipment, a medium and a product, and relates to the field of data processing. The method comprises the following steps: acquiring an infrared absorption spectrum signal, and obtaining original spectrum data; performing multi-scale noise separation and baseline correction on the original spectral data to obtain de-noised effective spectral features, and extracting methane specific absorption peaks from the de-noised effective spectral features; comparing the methane specific absorption peak with the interference gas spectral line through a multi-spectral line weight matching algorithm to obtain methane characteristic intensity; carrying out self-adaptive calibration on the methane characteristic intensity according to the drift compensation model to obtain calibrated characteristic intensity; obtaining a ppb-level methane concentration value through a concentration inversion model; and inputting the sorted concentration time sequence data into an anomaly detection model to detect a methane leakage event. By designing signal processing and algorithm analysis, the dependence on equipment hardware performance is reduced, and the use cost of ppb-level methane gas detection is reduced.

The invention relates to the field of data management, in particular to a VOCs pollution working condition data treatment method based on artificial intelligence. The method comprises the following steps: firstly, constructing a three-dimensional model of a factory, a pipeline and treatment equipment based on a BIM tool and a GIS technology, and deploying an Internet of Things sensor to collect VOCs pollution data; collecting original infrared absorption spectrum data of VOCs, and performing component identification by using a non-negative matrix factorization algorithm; a machine learning model is trained in combination with historical data, and short-term emission prediction is carried out; cooperative scheduling is carried out on the governance equipment through a multi-agent game optimization algorithm, and an optimal operation scheme is generated; constructing volume cloud modeling, and dynamically displaying an optimization effect; and if the predicted emission exceeds the standard, performing emission abnormity traceability analysis by using a graph neural network, and outputting a fault diagnosis report. According to the method, the VOCs emission prediction precision and the treatment efficiency are effectively improved.

The invention discloses a ship carbon emission on-line monitoring method, device and equipment, and the method comprises the steps: building a comprehensive emission feature library through collecting infrared absorption spectrum, gas flow and other multi-source emission signals in a ship operation process; eliminating gas cross interference by adopting a spectrum separation analysis technology, and establishing a concentration inversion mechanism to generate an independent monitoring domain; high and low emission working condition modes are identified through working condition relevance evaluation, and intelligent allocation of monitoring resources is achieved; marine environment compensation nodes are established, layered temperature and humidity correction control is implemented, and environment-adaptive ship environment parameters are generated; the multi-stage early warning trigger time is determined by adopting an early warning threshold backward deduction analysis technology, a ship emission monitoring time sequence table and a graded monitoring instruction set are constructed, full-working-condition, all-weather and high-precision intelligent monitoring of ship emission is realized, and reliable technical guarantee is provided for ship environmental protection compliance and marine environmental protection.

Apparatuses and methods for microscopic analysis of a sample by simultaneously characterizing infrared absorption characteristics of a plurality of spatially resolved locations are described herein. These apparatuses and methods improve sampling times while collecting microscopic data regarding composition of a sample across a wide field.

The invention provides a chemical storage tank gas leakage monitoring system and a gas leakage positioning method. A leakage diffusion model in a chemical storage tank area is constructed; extracting chemical gas diffusion characteristics at each monitoring position according to the leakage diffusion model, and performing inversion calculation on the chemical gas leakage concentration of the chemical storage tank area to obtain different pre-estimated leakage source positions and pre-estimated leakage source intensities in the chemical storage tank area; extracting infrared absorption characteristics of chemical gas at each high-risk leakage point at different moments from an infrared image sequence at different high-risk leakage points in the chemical storage tank area, and performing spatial constraint on each estimated leakage source position to obtain a spatial constraint value of each estimated leakage source position; and performing positioning evaluation on each estimated leakage source position to obtain the positioning confidence of each estimated leakage source position. By adopting the scheme of the invention, the success rate of leakage source positioning search can be improved under the scene of early weak leakage of the chemical gas.

The methods described herein provide improvements in composite infrared absorption imaging. The scanning approach described herein reduces erroneous measurements caused by thermal drift and optical interference that occurs between light scattering from the top surface of the sample and light scattering from the underlying substrate. Embodiments described herein relate to imaging and spectroscopy, and more particularly, to improvements in photo-thermal imaging and spectroscopy systems, and techniques for obtaining spectral information characterizing optical properties and / or materials or chemical compositions of a sample, such as information related to infrared (IR) absorption spectroscopy.

The invention relates to a PVB (polyvinyl butyral) composite film as well as a preparation method and application thereof. The PVB composite film is prepared from the following raw materials in parts by weight: 100 parts of PVB resin, 1-10 parts of nano praseodymium oxide, 1-10 parts of a dispersing agent, 0.01-1 part of a coupling agent and 20-50 parts of a plasticizer. The nano praseodymium oxide is added into the PVB resin, and the infrared absorption band of the PVB composite film is optimized by utilizing the infrared absorption performance, chemical stability and heat-resistant stability of the nano praseodymium oxide, so that infrared radiation can be efficiently blocked, and the excellent heat insulation effect and long-term use stability of the PVB composite film are realized. Furthermore, the nano praseodymium oxide is modified by a coupling agent, so that the dispersion uniformity of the nano praseodymium oxide in the PVB resin and the interface bonding force of the nano praseodymium oxide and the PVB resin are improved, the light transmittance loss of the PVB composite film is reduced, and the mechanical property and the heat insulation property of the composite film are improved.

The invention provides a quartz enhanced photoacoustic spectrometry detection system environment gas interference correction method which can be applied to the technical field of photoacoustic spectrometry gas detection. The method comprises the following steps: analyzing vibration-translation relaxation time and infrared absorption peak intensity of each gas to be detected; the to-be-detected gas with the vibration-translation relaxation time exceeding the time threshold value and the absorption peak intensity larger than the intensity threshold value is selected as comparison gas; dividing the laser of the comparison gas into a first laser beam and a second laser beam according to a preset proportion; using the first laser beam to excite a sound wave signal and detecting by a quartz tuning fork to generate a tuning fork electric signal; the second laser beam is enhanced and absorbed by a multi-reflection absorption cell and then is detected by a photoelectric detector to generate a light intensity electric signal; establishing a neural network model taking the tuning fork electric signal, the light intensity electric signal and the environment gas component vector as input and taking the to-be-detected gas concentration vector as output; and correcting the concentration of the to-be-detected gas under the interference of the environmental gas in real time through the trained neural network model.

The invention relates to the technical field of microbe traceability analysis, in particular to a microbe traceability analysis method based on an infrared absorption spectrum and a database, and the method comprises the following steps: acquiring absorbance spectral data: acquiring background spectral data for multiple times, performing background correction, acquiring spectral data of a sample containing a strain, and finally calculating the absorbance spectral data; preprocessing the absorbance spectrum data: smoothing the absorbance spectrum data by adopting an SG smoothing algorithm, and calculating a first-order derivative or a second-order derivative of the smoothed absorbance spectrum data to obtain an absorbance spectrum data set; spectral range selection: presetting different spectral ranges, and selecting different spectral ranges for analysis according to requirements; analyzing the similarity of the strains: analyzing the similarity of the absorbance spectral data set of the strains by adopting an improved hierarchical clustering algorithm; bacterial strain traceability analysis: determining a classification threshold by adopting a threshold determination algorithm, and judging microorganism traceability information; the traceability analysis precision is high, and the reliability, the stability and the practicability are high.

The invention discloses a fused salt phase change heat storage composition as well as a preparation method and application thereof, and belongs to the technical field of heat storage. The fused salt phase change heat storage composition provided by the invention comprises the following components: a fused salt material, the melting point of the fused salt material is 100-1500 DEG C, and the absorption coefficient of the fused salt material to infrared waves is 0-100m <-1 >; the infrared absorbing material comprises at least one of transition metal chlorine salt, metal carbonate, metal sulfate, metal nitrate, a carbon-based material, silicon carbide and spinel. The fused salt phase change heat storage composition provided by the invention has high heat exchange power (average heat release power) and heat storage energy density. The invention further provides a preparation method and application of the fused salt phase change heat storage composition.

To provide a gas barrier laminate having a gas barrier coating film excellent in oxygen barrier properties and transparency and having steam barrier properties more excellent than those of a conventional gas barrier coating film, and to provide a coating composition capable of efficiently forming the gas barrier coating film.SOLUTION: The gas barrier laminate has a gas barrier coating film on a substrate, and is characterized in that it is free from coloration derived from organic compounds such as amine compounds and carboxylic acid compounds, the content ratio (P / Zr) of Zr (Zr-kα) and P (P-kα) in fluorescent X-ray measurement of the coating film is in the range of 1.39 to 2.59, and the ratio (P2 / P1) of the peak area (P2) at 2600 to 3700 cm-1 to the peak area (P1) at 850 to 1350 cm-1 in the infrared absorption spectrum of the coating film is less than 0.772.SELECTED DRAWING: None

The invention discloses an in-situ harmful gas monitoring method for sewage treatment plant structures, and particularly relates to the field of in-situ harmful gas monitoring, and the in-situ harmful gas monitoring method comprises the following steps: collecting refractive index disturbance data of a local gas-liquid-gas interface caused by bubble release in a sludge tank or an anaerobic tank, and forming a refractive index distribution field changing along with time; and modeling an infrared light propagation path based on the refractive index distribution field, executing infrared absorption inversion operation, solving a first concentration result of the harmful gas, and establishing a mapping relationship between the first concentration result and the refractive index distribution field. Through coupling calculation of a refractive index distribution field caused by bubble disturbance and an infrared absorption inversion process, a reciprocating iteration and time sequence prediction chain is constructed so as to correct dynamic optical distortion and stably solve the real release intensity of harmful gas.

The invention relates to the technical field of energy-saving building materials, and discloses a multi-layer composite sunshade film with a self-cleaning function, which sequentially comprises a release film layer, a bonding layer, a base material layer I, a spectrum functional layer, a base material layer II and a self-cleaning layer from inside to outside, the raw material of the spectrum functional layer comprises at least one of an infrared absorbent, a visible light absorbent and an ultraviolet absorbent; the self-cleaning layer is a modified layer obtained by modifying the surface of the base material layer II through fluorosilane. According to the sunshade film, the energy-saving performance of a building can be greatly improved, so that the maintenance cost is reduced, and the sunshade film is suitable for being used outdoors for a long time and can also be attached to the outer surface of the building for use.

The invention is suitable for the technical field of optical design parameter optimization, and provides a design parameter optimization method and system for a long-optical-path gas absorption cell, and the method comprises the following steps: carrying out the theoretical verification of the feasibility of the lens parameters of a spherical reflector based on a theoretical model of a light propagation matrix, and obtaining the design parameters of the spherical reflector; determining an initial lens parameter and a key design parameter range; an optical cavity model composed of two spherical reflectors is established, and automatic ray tracing simulation is carried out according to the initial lens parameters, the key design parameter range and a preset stepping value; the simulation data are verified, the number of light spots is determined, and the optimal key design parameter combination enabling the optical path to be maximized is screened out according to the number of the light spots. The method is mainly used for designing a long-optical-path gas absorption cell in infrared absorption spectrum trace gas sensor detection, has practical significance, realizes verification of optimal design parameters, reduces development difficulty and improves development efficiency.

Provided are: a gas barrier film that includes a vapor deposition layer (B) that includes at least one metal element selected from among zinc, magnesium, and calcium and a compound that has a carbonyl group on a plastic film; and a packaging body that includes the gas barrier film. The peak ratio (A1575 / A1687) of the absorption peak height A1687 at a wavenumber of 1687 cm-1 to the absorption peak height A1575 at a wavenumber of 1575 m-1 on an infrared absorption spectrum for the vapor deposition layer (B) is preferably 0.1–5.0.

Improvements in spectroscopy are disclosed herein that rely on the interaction of both an infrared beam and a probe beam with a sample. These beams are used in a pump-probe arrangement, with a fiber optic probe collecting the beams of infrared and probe radiation from the infrared source and delivering it to the sample. At least a portion of the beam of infrared radiation and the beam of probe radiation overlap one another on the sample. The fiber also collects probe radiation that has interacted with the sample. A detector can use this collected signal to indicate an intensity of the collected probe radiation, and an analyzer can generate a signal indicative of infrared absorption of the sample adjacent the fiber.

The invention discloses a modular online gas leakage detection system, which comprises a detection module, a processing module and a communication module, and is characterized in that the detection module captures a gas infrared absorption spectrum in real time; the processing module is used for receiving the gas infrared absorption spectrum and identifying related data including leakage gas types and positioning in combination with an AI algorithm; the communication module pushes related data to a cloud end, and the communication module remotely loads and customizes a gas recognition model of the cloud end to the processing module, so that the processing module updates an AI algorithm in real time. The invention discloses a modularized online gas leakage detection system, and aims to provide a gas leakage detection system integrating detection, processing and communication functions, which can capture a gas infrared absorption spectrum in real time, accurately identify and position the type and concentration of leaked gas, support remote updating of an algorithm and adapt to diversified detection requirements.

The invention discloses an unmanned aerial vehicle-mounted in-situ water vapor measurement method and system based on an infrared absorption spectrum, and the method comprises the steps: S1, carrying out the calibration of a laboratory before flight, and building a concentration inversion model; s2, starting an in-situ infrared water vapor sensing module, cooperatively working in combination with a differential positioning module, a temperature and pressure sensor and an electronics module, and acquiring data along a cruise path of the unmanned aerial vehicle; and S3, carrying out real-time water vapor concentration inversion and data fusion. The method is different from the traditional detection means that air chamber atmosphere sampling, detection and exhaust processes are adopted, in-situ detection is directly carried out on the atmosphere in the target area, the measurement efficiency is greatly improved, meanwhile, the measurement deviation caused by air chamber residual gas introduction is avoided, and the engineering property of the system is enhanced.

The invention relates to the technical field of gas detection, and provides an LNG (Liquefied Natural Gas) dual-fuel ship exhaust gas monitoring device and a cross interference correction method thereof, synchronous detection of SO2 (0-1500ppm), CO2 (0-30%), CH4 (0-1500ppm) and NO (0-1500ppm) is realized by adopting optical detection principles such as ultraviolet differential absorption, non-dispersive infrared absorption and tunable semiconductor laser absorption spectroscopy, the error is controlled within + / -2% FS, and the detection accuracy is high. And the response time does not exceed 30s. The device realizes simultaneous accurate detection of LNG dual-fuel characteristic gas, and has the advantages of high detection precision, fast response speed, simple operation and maintenance, relatively low cost and strong cross interference resistance of gas under complex working conditions.

The invention discloses an ethylene / alpha-olefin copolymer with excellent processability and a preparation method and application thereof, the ethylene / alpha-olefin copolymer is obtained by polymerization of ethylene and at least one alpha-olefin as comonomers, and the ethylene / alpha-olefin copolymer has the following characteristics: a) bimodal molecular weight distribution; b) the density is 0.85 to 0.95 g / cm < 3 >, preferably 0.865 to 0.885 g / cm < 3 >; c) In infrared absorption spectrum measurement, # imgabs0 # is satisfied, 0.015 < A1 (1370 cm <-1 >) < 0.045, and 0.06 < A2 (720 cm <-1) < 0.15. The copolymer shows excellent processability and comprehensive performance in preparation of a packaging adhesive film, such as relatively high linear speed and relatively low crystal point defect rate.

The application provides an infrared absorption material based on doping regulation, a preparation method and an infrared detector. By introducing selenium atoms to replace tellurium atoms in a sodium gallium telluride material, the material is doped according to a doping ratio of 1:4 to 1:2 of atomic weight, the energy band structure and optical properties of the material are regulated, a new infrared absorption material is obtained, and the light absorption performance of the material in the infrared wave band is significantly improved. According to the component characteristics of the infrared absorption material, a specific preparation scheme is provided, the preparation is completed by grinding, secondary melting and annealing treatment of the set principle mass of sodium single substance, gallium single substance, tellurium single substance and selenium single substance, and the band gap and absorption intensity are accurately adjusted, and the symmetry and crystal stability of the material are also considered.

A method for predicting a risk of a clinical outcome of a patient, the method comprising: receiving clinical data relating to the patient; generating a histological index based on infrared absorption data collected from a sample of the patient; and generating a pre-determined risk score based on the histological index and the clinical data. The method may be partially or fully automated.

The utility model discloses a kind of optical multi-channel gas sensors based on NDIR principle, it is related to infrared gas sensor technical field;By infrared light source, air chamber, four-channel thermoelectric detector composition infrared absorption light system, light source voltage stabilizing modulation circuit, thermoelectric weak signal conditioning circuit, high-precision analog-digital conversion circuit, single-chip microcomputer control and communication circuit system composition, the utility model realizes compact structure, the function of the real-time measurement of multiple gas;Realize low-noise zero drift self-stable signal processing circuit, design low-power 24-bit sampling circuit, accurate real-time digital signal can be obtained without complex data processing algorithm, the utility model design has the characteristics such as wide range, high precision, good stability, long life, miniaturization, simultaneously replace sensor end can measure multiple types of gas, solve the problem that traditional infrared optical gas sensor is high in cost, bulky inconvenient to carry, detection result is time-consuming long precision is susceptible to environmental interference.

The utility model relates to gas detection technical field, the utility model provides a kind of LNG dual-fuel ship exhaust monitoring device, using ultraviolet differential absorption, non-dispersed infrared absorption and tunable semiconductor laser absorption spectroscopy etc. Optical detection principle realizes the synchronous detection of four kinds of gases SO2 (0~1500ppm), CO2 (0~30%), CH4 (0~1500ppm) and NO (0~1500ppm), error is controlled within ±2%FS, response time is not more than 30s. Realize LNG dual-fuel characteristic gas accurate detection simultaneously, with the advantages of high detection precision, fast response speed, simple operation, relatively low cost and strong gas cross-interference resistance ability under complex working conditions.

The invention discloses a manufacturing method of a resin lens capable of efficiently blocking infrared rays. The manufacturing method comprises the following steps: S1, preparing an attached base material anti-infrared resin lens; s2, dissolving an infrared absorbent; s3, plating a film layer on the outer side of the resin lens; the anti-infrared effect is adjusted by controlling the proportion of the infrared absorbent, and the cat eye phenomenon is avoided; as the base film and the secondary pouring material can be different materials, the defect that the secondary pouring material cannot be made into the anti-infrared lens as the infrared absorbent is not dissolved is overcome.

The invention relates to the technical field of sewage treatment, and discloses a system and a method for inhibiting nitrous oxide release in a sewage denitrification process, and the system comprises a water inlet unit, a denitrification reaction unit, a dissolved oxygen monitoring module, a central control unit, a gas collection unit and a performance evaluation module. The multi-point arrangement and encryption communication mode of the dissolved oxygen monitoring module improves the accuracy and safety of data acquisition, and the corrosion-resistant design of the gas collection unit and infrared absorption spectrometry detection ensure the reliability of gas analysis. The central control unit realizes the adaptive capability of the system through real-time monitoring and dynamic adjustment, and the performance evaluation module improves the long-term operation efficiency of the system through data analysis and optimization suggestion generation. According to the method, a dissolved oxygen dynamic balance regulation mechanism and a multi-parameter collaborative optimization strategy are introduced, and a real-time monitoring and feedback control technology is combined, so that the problem of generation of byproducts in the nitrification and denitrification process is solved, and the release amount of nitrous oxide is effectively reduced.

The present invention provides a resin material analysis method and a resin material analysis device, with which it is possible to nondestructively evaluate the degree of progress of hydrolysis for a resin material that contains a polymer having hydrolyzability.　Provided is a resin material analysis method in which a resin material that contains a polymer having hydrolyzability is subjected to: a reference measurement step for performing near-infrared spectroscopic measurement on a plurality of reference samples that are composed of the resin materials having different degrees of progress of hydrolysis so as to obtain a plurality of reference spectra; an objective measurement step for performing near-infrared spectroscopic measurement on an objective sample that is composed of the resin material having an unknown degree of progress of hydrolysis so as to obtain an objective spectrum; and an estimation step for estimating the degree of progress of hydrolysis in the objective sample by comparing the objective spectrum with the plurality of reference spectra in a wavelength range including contributions (A, B) of near-infrared absorption by a hydroxyl group.

The system can flexibly respond to changes in the required amount of raw material gas and supply the raw material gas accordingly, completely vaporize the supplied liquid raw material without clogging, and continuously supply the raw material gas at the required temperature. , a temperature detector for vaporizers that uses infrared radiation as a heat source To provide. [Solution] The temperature detector 70 is for a vaporizer 10 that uses infrared radiation as a heat source. The temperature detector 70 consists of a graphite infrared absorber 78 that absorbs infrared radiation and is heated, and a temperature detection element 71 embedded in the infrared absorber 78 that detects the temperature of the infrared absorber 78.

To provide automotive window glass that can improve infrared absorption performance without the need for an interlayer. [Solution] The automotive window glass according to the present invention comprises an outer glass plate, an inner glass plate, and an interlayer that bonded the outer glass plate and the inner glass plate and substantially has no infrared absorption properties, and has a thermal transmittance (Ttf) of 44.0% or less.