14 results about "Uv spectrum" patented technology

This invention proposes an online quality detection method for An Shen Bu Nao Liquid based on multispectral fusion. Addressing the bottlenecks of traditional detection techniques, such as long offline processing time, weak multi-index detection capabilities, and poor dynamic adaptability, this method achieves intelligent quality control throughout the entire production process. The device integrates ultraviolet-visible spectroscopy, near-infrared spectroscopy, and fluorescence spectroscopy modules. It constructs a multi-scale residual convolutional network to extract ultraviolet-visible spectral features, uses a two-way LSTM to analyze the fluorescence excitation-emission matrix, and employs dynamic baseline correction of the ultraviolet spectrum. This improves the detection accuracy of icariin content by 40% compared to traditional HPLC methods, and achieves a heavy metal residue detection limit of 0.05 ppm, providing an innovative solution for the intelligent production of traditional Chinese medicine preparations.

The utility model provides an analytical instrument for detecting the concentration of dissolved ozone water according to an ultraviolet spectrum principle, which comprises a dissolved ozone water analyzer water inlet, an ozone water detection sensor and an ozone water flowmeter, the ozone water detection sensor is formed by combining an ultraviolet LED light source, an ultraviolet light lens, a refraction sheet, a reference light photoelectric receiver, a polytetrafluoroethylene detection chamber, a sapphire lens, a sensor water inlet, a sensor water outlet and a sampling light photoelectric receiver, and the sensor water inlet is communicated and connected with a water inlet of the dissolved ozone water analyzer through a first three-way connector; according to the design, the problems of low ozone concentration measurement accuracy and short service life in the prior art are solved, the concentration of ozone dissolved water can be accurately measured through the ultraviolet spectrum principle and the double-light-path detection technology, and the zero point automatic correction function is achieved.

This invention proposes a sunscreen composition, its preparation method, and its application in cosmetics, belonging to the fields of medical, dental, or cosmetic formulations. The sunscreen composition contains components of boron nitride-titanium dioxide-encapsulated silica and plant extracts; the plant extracts are loaded onto the boron nitride-titanium dioxide-encapsulated silica; the plant extracts are a combination of Aspergillus niger fermented Sophora japonica flower extract and Scutellaria baicalensis extract. This invention achieves highly efficient sun protection through a multi-mechanism synergy: the porous silica-titanium dioxide core-shell structure provides physical scattering, boron nitride doping enhances reflection, and the loading of the Aspergillus niger fermented Sophora japonica flower and Scutellaria baicalensis extract achieves chemical absorption and antioxidant protection through a synergistic effect, resulting in highly efficient protection against the entire UV spectrum. This system avoids the use of chemical sunscreens, is highly safe, and has a pleasant skin feel.

An oily structural color pigment ink and the use thereof. The oily structural color pigment ink comprises the following components: at least one block polymer brush, at least one resin or at least one resin precursor, and at least one organic solvent. The oily structural color pigment ink is a layered structural color material obtained by self-assembly on the basis of a micro-phase separation principle of a block polymer brush. The provided oily structural color pigment ink can be compatible with most of the common pigment coloring methods, including but not limited to screen printing, spraying, inkjet printing, and gravure printing. The structural color of the oily structural color pigment ink is not limited to a visible light waveband, but instead also covers a ultraviolet spectrum, a visible spectrum and an infrared spectrum, and the wavelength range of the electromagnetic spectrum covered by the structural color is 200-2000 nm.

This invention discloses a combustion environment aerodynamic parameter measurement system and method based on the strong absorption advantage of ultraviolet (UV) spectroscopy, belonging to the field of combustion diagnostic technology. The measurement system includes: a fiber-optic coupled in-situ measurement unit for fiber-optic coupling of a UV beam emitted from a UV light source to obtain fiber-optic coupled absorption spectral signals of various small-area points; a UV absorption measurement and control analysis unit for obtaining the first UV absorption spectrum of each small-area point; a simulation unit for obtaining the second UV absorption spectrum of each small-area point; a training unit for training a neural network using the second UV absorption spectrum; and a calculation unit for calculating combustion environment aerodynamic parameters using the first UV absorption spectrum and the trained neural network. This invention can improve the accuracy of short-path probe measurements of combustion environment aerodynamic parameters.

This invention relates to the field of atmospheric trace gas detection technology, specifically disclosing an ultra-high sensitivity online detection system and method for atmospheric BrO radicals. The ultra-high sensitivity online detection system for atmospheric BrO radicals includes an optical cavity, a 340 nm ultraviolet light source, an ultraviolet optical fiber, an ultraviolet spectrometer, and a sampling unit. The optical cavity has an inlet and an outlet, and contains an ultraviolet optical resonance region. Ultraviolet light emitted from the ultraviolet light source is reflected multiple times in the ultraviolet optical resonance region and then transmitted into the ultraviolet optical fiber. The ultraviolet optical fiber is used to superimpose all transmitted light in the ultraviolet band and transmit it to the ultraviolet spectrometer. The sampling unit is used to directly input the gas to be measured into the optical cavity, or to selectively remove BrO radicals from the gas to be measured before inputting it into the optical cavity. This invention achieves ultra-high sensitivity online point detection of BrO radicals in the atmosphere. Compared with existing technologies at home and abroad, its BrO detection limit is better than 1 pptv, reaching the sub-pptV level, demonstrating excellent detection performance.

The application provides a municipal sewage COD intelligent online monitoring method and system based on ultraviolet spectrum, relates to the technical field of water quality monitoring, and the application obtains a COD sequence of a target detection point in a preset target time window and an absorbance vector of a current detection water body in an ultraviolet band; performs discrete difference calculation on the absorbance vector to obtain a slope vector; calculates the Euclidean distance between each local extreme value in an extreme value vector and each local slope in the slope vector to obtain a joint state vector; based on a plurality of historical joint state vectors in a preset data update buffer pool, the Mahalanobis distance between the joint state vector and each historical joint state vector is calculated; the Mahalanobis distance is substituted into a preset Gaussian kernel density function to obtain a current COD concentration value. Realize adaptive high-precision real-time monitoring of complex component sewage.

The application provides a spectrum detection device and method based on ultraviolet-fluorescence feature level fusion, and belongs to the field of spectrum detection and analysis. The device comprises an ultraviolet light source module, a sample detection module, a fluorescence collection module, a spectrum analysis module and a data processing module. The ultraviolet light source module is used for providing stable ultraviolet excitation light; the sample detection module is used for irradiating the ultraviolet light onto a sample to be detected and collecting the excited fluorescence signal; the fluorescence collection module captures the fluorescence signal through a high-sensitivity detector; the spectrum analysis module performs spectrum separation on the collected ultraviolet light and fluorescence signal; and the data processing module adopts a feature level fusion algorithm to perform fusion analysis on the features of the ultraviolet spectrum and the fluorescence spectrum, so as to improve the detection precision. The application can simultaneously utilize the advantages of the ultraviolet spectrum and the fluorescence spectrum, comprehensively detects the physical and chemical characteristics of a sample, and is widely applicable to the fields of food safety detection, biological medicine analysis, environmental monitoring and the like.

The performance of F-containing optical materials can degrade rapidly in the extreme ultraviolet (EUV), VUV, deep ultraviolet (DUV) and / or UV spectral ranges as a result of radiation degradation, leading to reduced optical performance and lifetime of optical applications and / or systems.SOLUTION: The optical system comprises a bulk material comprising an optical material comprising fluorine (F). When a bulk material is under extreme ultraviolet (EUV), vacuum ultraviolet (VUV), deep ultraviolet (DUV) and / or UV radiation, the bulk material is exposed to an environment with a pressure ranging from atmospheric pressure to vacuum. The environment includes at least one type of gas or vapor. At least one type of gas or vapor comprises polar molecules.SELECTED DRAWING: Figure 1

This invention relates to the field of polymer materials technology, and discloses a high weather-resistant, low-gloss rigid polyvinyl chloride film, its preparation method, and its application. The film comprises, by weight, 100 parts of polyvinyl chloride resin, 10 parts of matte polyvinyl chloride resin, 1-2.5 parts of stabilizer, 1-5 parts of processing aid, 5-10 parts of polymer modifier, 0.2-1 part of internal lubricant, 0.2-0.7 parts of external lubricant, 0.2-0.7 parts of antioxidant, 0.8-3 parts of UV absorber A, 0.8-3 parts of UV absorber B, and 0.4-1.2 parts of UV absorber C. This invention is completely free of plasticizers and complies with RoHS, REACH and other environmental standards. Three UV absorbers synergistically cover the entire 250-405nm UV spectrum, significantly improving weather resistance. Utilizing planetary screw extrusion, two-roll open milling, and five-roll calendering processes, the film, after 300 hours of UV aging, exhibits a color difference value ΔE ≤ 0.15 and an outdoor service life of 15-20 years. This invention solves the problems of easy plasticizer migration and insufficient weather resistance in traditional low-gloss PVC films, making it suitable for home decoration materials or packaging materials.

The use of arrays of light emitting diodes (LEDs) emitting in the ultraviolet spectrum (UV-LEDs) for disinfection of large-scale water flow. An irradiation chamber can utilize the high power density of UV-LEDs arranged into a planar array. irradiating fluid flowing through a cylindrical irradiation chamber. formed of a transmissive material. The transmissive irradiation chamber may be enclosed within a secondary optical chamber of a reflective material. or coated or covered with a reflective material. The cylindrical irradiation chamber allows for the deployment of vortex generators to introduce a swirling laminar flow region which causes the flow to spiral along the length of the irradiation chamber to equalize UV exposure between hot spots and dark regions or irradiation.

A UV-based imaging method for determining protein concentrations in unknown protein samples based on automated multi-wavelength calibration is disclosed. In various embodiments, a processor receives each of a set of standard wavelength data, such as data recorded by a detector, and a set of unknown wavelength data. Each of the set of standard wavelength data and the set of unknown wavelength data defines a series of absorbance-wavelength value pairs across a first wavelength range selected from a series of single-wavelength beams from the UV spectrum. The processor generates a multi-wavelength calibration model based on each of the first series of first absorbance-wavelength value pairs from the set of standard wavelength data. The processor implements the multi-wavelength calibration model to determine multiple protein concentration values ​​for each unknown protein sample in a given unknown protein sample.