543 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 technical field of acetylene cracking furnace production monitoring, and particularly discloses a CO laser detection system based on a thermal radiation background, which is used for solving the problem that an existing monitoring system is difficult to accurately distinguish CO and water vapor signals because thermal radiation and water vapor generated by high temperature in an existing ethylene cracking furnace interfere infrared absorption measurement of CO. Comprising a quantum cascade laser, a pyroelectric detector, a data processing unit and a signal analysis module, a reference light intensity adjusting module utilizes temperature, humidity and pressure data obtained by an environment parameter sensing module in real time to adjust the CO absorption coefficient through an environment correction factor, the reference light intensity is dynamically calculated and corrected according to the reference light intensity, and the signal analysis module analyzes the signal. The data processing unit is used for dynamic correction of CO concentration monitoring; a CO signal is effectively extracted under a thermal radiation background through a quantum cascade laser and a light beam modulation technology, environment correction and real-time monitoring are combined, CO concentration abnormity is accurately recognized, early warning is given out, and the monitoring sensitivity and reliability are improved.

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.

To provide polyimide as an insulation material for preparing a printed circuit board.SOLUTION: Polyimide includes one or a plurality of repeating units derived from dianhydride, and one or a plurality of repeating units derived from diamine. Infrared absorption spectrum of the polyimide obtained through Fourier transform infrared spectroscopy (FTIR) using attenuated total reflection (ATR) has a characteristic peak A of 1,753 cm-1 to 1,803 cm-1, a characteristic peak B of 1,635 cm-1 to 1,752 cm-1, and a characteristic peak C of 1,160 cm-1 to 1,170 cm-1, the characteristic peak A has a characteristic peak area a, the characteristic peak B has a characteristic peak area b, the characteristic peak C has a characteristic peak area c, b / a is 25.00 or less, and c / b is 0.3000 or more.SELECTED DRAWING: None

The invention relates to a coal mine underground gas extraction concentration real-time monitoring and early warning device which comprises a shell arranged in the deep part of a sleeve, a deep part concentration monitoring part is arranged at one end, close to the deep part of a monitoring hole, in the shell, and the deep part concentration monitoring part comprises an infrared absorption type sensor. And a sealing jacking part connected with the inner wall of the sleeve is also arranged in the middle of the shell. According to the invention, gas concentration monitoring and early warning can be carried out at the deep part of the monitoring hole, deep gas abnormity can be found 10-30 minutes in advance, and a guarantee is provided for safe power-off and people removal.

The invention provides an infrared broadband absorber. According to the invention, an efficient absorption structure is formed by introducing the non-antisymmetric Bragg structure layer and the metal material film with relatively high absorption rate. The phase change material and the dielectric material form an antisymmetric Bragg structure, the absorptivity of the device is further improved, and the MgF2 low-refractive-index layer is combined, and the materials and the thickness of each layer are optimized, so that effective reflection suppression and absorption enhancement of light with different wavelengths are realized. Compared with the prior art, the infrared broadband absorber is simple in structure, the absorption effect of 90% or above can be achieved within the ultra-wide range, the relative absorption bandwidth exceeds 152.8%, a great opportunity is provided for ultra-wide spectrum detection, a feasible technical approach is provided for ultra-wide spectrum confrontation and invisibility, and the infrared broadband absorber has the advantages of being high in practicability and wide in application range. And confrontation and stealth on active and passive composite sensing detection equipment are expected to be realized, and the application potential of the material in the fields of infrared absorption, infrared stealth, photothermal conversion, sensing and the like is expanded.

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 belongs to the technical field of soil content testing, particularly relates to a device and a method for testing the content of sulfur in soil based on an infrared absorption principle, and aims to solve the problems that gas flows into another detection pool along with introduction, and the residence time is difficult to control during detection, so that the detection time is insufficient, data errors are easy to occur and the like. In order to solve the problems that gas in a single detection pool cannot be uniformly distributed, and the distribution of the gas in the single detection pool is not uniform, the invention provides the following scheme: the device comprises a base bracket, the top of the base bracket is fixedly connected with a combustion bottom bin, the outer wall of the combustion bottom bin is fixedly connected with a connecting bracket, and the outer wall of one side of the connecting bracket is fixedly connected with a combustion bin; a mounting opening is formed in the top of the combustion bin. The device and method for testing the sulfur content in the soil based on the infrared absorption principle have the effect of improving the accuracy of detection data, the residence time of sulfur-containing gas in the detection chamber is prolonged during use, meanwhile, the sulfur-containing gas is distributed more uniformly, and the accuracy of the detection data is 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 multi-component greenhouse gas detection method and system based on an infrared absorption spectrum. The method comprises the following steps: obtaining the infrared absorption spectrum of a detected gas sample through measurement by a detection system; processing the infrared absorption spectrum of the detected gas sample by adopting mean filtering to obtain a background spectrum; calculating the greenhouse gas transmittance by using the background spectrum and the infrared absorption spectrum of the detected gas sample; calculating to obtain a greenhouse gas reference calibration spectrum by using a greenhouse gas standard absorption cross section provided by an HITRAN database; and carrying out iterative fitting on the transmittance and the reference calibration spectrum by adopting a nonlinear least square algorithm to invert the concentration of the greenhouse gas so as to realize the detection of the concentration of the multi-component gas in the greenhouse gas. The method can be used for greenhouse gas content monitoring in various different scenes.

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.

[Problem] To provide a resin-coated seamless aluminum can that has both resin adhesiveness and a color tone. [Solution] This resin-coated seamless aluminum can is characterized by comprising an aluminum base material, a surface treatment layer formed on at least one surface of the aluminum base material, and a resin layer formed on the surface treatment layer, and is characterized in that the surface treatment layer contains aluminum hydroxide, and exhibits, in an infrared absorption spectrum thereof measured by FT-IR, a Pa / Pb value of 0.13-3.00 when the height of an absorbance peak at a wave number of 850-1000 cm-1 is defined as Pa and the height of an absorbance peak at a wave number of 1000-1200 cm-1 is defined as Pb.

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 infrared focal plane detector chip structure with a suspension verification structure and a preparation method, the infrared focal plane detector chip structure with the suspension verification structure comprises an R0IC wafer, the suspension verification structure, a pixel bridge floor layer and an infrared absorption umbrella layer, the suspension verification structure is arranged on the surface of the R0IC wafer, the pixel bridge floor layer is arranged on the surface of the R0IC wafer, and the infrared absorption umbrella layer is arranged on the surface of the R0IC wafer. The pixel bridge floor layer is arranged on the suspension verification structure, and the infrared absorption umbrella layer is arranged on the pixel bridge floor layer; the suspension verification structure comprises a dielectric layer and a resistance layer, the resistance layer is divided into two parts, one part is a heating resistor of the suspension verification structure, and the other part is a pixel replacement resistor structure. According to the invention, bad problems generated by the R0IC and the MEMS can be verified separately, the response rate of the pixel of the infrared focal plane detector is improved, and the suspension verification structure has no influence on thermal and electrical parameters of the pixel.

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 discloses a near-infrared absorption supramolecular cation free radical as well as a preparation method and application thereof, and belongs to the technical field of photo-thermal therapy. The supramolecular cation free radical is obtained by taking a supramolecular host compound as a stabilizer, forming a compound by supramolecular self-assembly of the supramolecular host compound and a guest molecule compound in an aqueous solution, and then oxidizing to lose an electron. Compared with an original-guest cation free radical (the structural formula is shown in the formula II), the supramolecular cation free radical has better water solubility, longer free radical life, stronger near-infrared absorption capability, more excellent photothermal conversion capability and stronger capability of photothermally killing pathogenic bacteria and tumor cells.

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.

The invention discloses a natural gas energy metering method and a natural gas energy metering device. The metering method comprises the following steps: detecting TCO2 and TCnHm by adopting a non-dispersive infrared gas sensor; a laser sensor is adopted for detection to obtain TCH4, and the TCnHm is corrected based on the TCH4 to obtain T 'CnHm except CH4; tH2 is detected through a thermal conductivity gas sensor, and TH2 is corrected based on TCH4, TCO2 and T 'CnHm to obtain T' H2; an ultrasonic flowmeter is adopted to detect the measured flow velocity of gas in the natural gas pipeline, the measured flow velocity is corrected to obtain the actual flow velocity of the gas in combination with TCH4, TCO2, T 'CnHm, T' H2 and the pressure and temperature, obtained by the ultrasonic flowmeter, in the natural gas pipeline, and the actual flow q of the gas in the natural gas pipeline is calculated based on the actual flow velocity; energy is calculated by selecting a fixed infrared absorption wavelength of the CnHm to convert the CnHm into one of fixed components of C1-C6, and natural gas energy Q is calculated according to an energy calculation formula # imgabs0 #; therefore, operation is simple, cost is low, and calculation results are accurate.

The method according to the invention relates to heating a fluid in an electrical heating device (80) via the infrared radiation of an infrared-radiating surface. The heating device (80) has a resistance heating element arrangement (12) comprising resistance heating elements (13), the surfaces of which form the infrared radiating surface and emit infrared radiation into an absorber chamber (16) through which the fluid to be heated flows. The fluid comprises an infrared-absorbing gas and heats up by absorbing the infrared radiation (15). At high temperatures, non-inert gases, i.e. a non-inert fluid, have a corrosive effect on resistance heating elements (13). A protective gas arrangement (82) prevents corrosive fluid from coming into contact with the resistance heating elements (13).

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 relates to the field of ganoderma lucidum component identification, in particular to an infrared spectrum-based intelligent identification device and method for ganoderma lucidum of different qualities. The method comprises the following steps: firstly, acquiring infrared absorption spectrum curves of different ganoderma lucidum samples, extracting an absorption peak of each spectrum curve, analyzing the position distribution of the absorption peaks in the same column of each spectrum curve to obtain the position offset degree of each absorption peak of the spectrum curve, and calculating the position offset degree of each absorption peak of the spectrum curve according to the acquired compensation coefficient of each absorption peak; adjusting the position of each absorption peak of the spectrum curve to obtain an adjusted target spectrum curve, and identifying the components of the ganoderma lucidum sample corresponding to the spectrum curve based on the adjusted target spectrum curve. According to the method, the offset phenomenon of the absorption peak in the infrared absorption spectrum can be eliminated, and the accuracy of identifying ganoderma lucidum components with different qualities is improved.

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 a non-spectral infrared gas analysis system, which relates to the technical field of gas analysis, and comprises an infrared absorption cell used for receiving gas to be detected; the black-body radiation infrared light source is used for emitting infrared light to the infrared absorption cell; the gas to be detected is used for selectively absorbing infrared light; the light source driving modulation circuit is used for driving a black-body radiation infrared light source through a resistor of which the resistance value dynamically changes along with the temperature; the infrared detector is used for receiving the infrared light absorbed by the gas to be detected; the signal processing module is used for detecting the intensity change of the infrared light before the infrared light is absorbed by the gas to be detected and the intensity change of the infrared light after the infrared light is absorbed by the gas to be detected, converting the intensity change into an electric signal, and processing the electric signal to obtain a digital signal; and the controller is used for converting the digital signal into the concentration of the gas to be detected. According to the non-spectral infrared gas analysis system, a black-body radiation infrared light source is adopted, and the power consumption is reduced through a rapid electric modulation function.