197 results about "Ultraviolet fluorescence" patented technology

The invention discloses an ultraviolet fluorescence double-signal water quality monitoring device taking an LED (light emitting diode) as a light source and an application method of the device, and belongs to the field of environmental monitoring and water treatment. The ultraviolet fluorescence double-signal water quality monitoring device taking the LED as the light source consists of a sample collecting part and a detection part. The application method comprises the steps of selecting a deep ultraviolet LED lamp light source with specific wavelength and a photoelectric detector component according to a three-dimensional fluorescence atlas, detecting fluorescence intensity and ultraviolet absorption at the specific wavelength at the same time and calculating a ratio of the fluorescence intensity to the corresponding ultraviolet absorption. According to the device, no chemical reagent is consumed, monitoring of total concentration change of soluble organic matters in a water body can be realized, change of concentration of fluorescence ingredients such as proteins and humus can be reflected at the same time, and the sensitive, quick, efficient, economical, easy and information-rich on-line monitoring device is provided for the water treatment.

A solution for managing illumination of an organism with ultraviolet light is provided. A set of ultraviolet fluorescence characteristics of the organism can be determined using fluorescence data for the organism. The set of ultraviolet fluorescence characteristics can be used to determine a set of target properties of the ultraviolet light. The set of target properties can be used to illuminate the organism with ultraviolet light. The illumination can be managed during growth of the organism, breeding of the organism, and/or maintenance of the organism after harvest.

The invention provides an anti-counterfeit ink composition for judicial expertise and application of the anti-counterfeit ink composition. The anti-counterfeit ink composition comprises the following components in percentage by weight: 0.01-99% of materials with optical characteristics, 1-95% of link material, 0-30% of pigment and 0-70% of an auxiliary. Compared with the existing anti-counterfeit ink, the anti-counterfeit ink composition disclosed by the invention has the advantages that anti-counterfeit characteristics need to be read through a specific instrument and specific equipment and are used for the judicial expertise. Through the combination of different Raman spectrum materials and/or the combination of different ultraviolet fluorescence characteristic materials, a unique signal of the ink can be formed, and an anti-counterfeit coding effect is achieved.

An instrument for photodynamic therapy applies treatment light from a dye laser, white light, and ultraviolet fluorescence excitation light from an LED onto a lesion and surrounding areas in a time-multiplexed manner. The reflected white light is analyzed in a spectrometer to determine a correction for the dynamic optical spectral properties of the patient's tissue. Light emitted by fluorescence from the lesion and the surrounding areas is analyzed in another spectrometer, and the results are corrected in a computer, using the correction. An optical switch has been developed for the instrument, using a bistable solenoid and a sled.

The present invention relates to refrigerant compositions comprising refrigerant, UV fluorescent dye and solubilizing agent that enable introduction of leak detectant UV fluorescent dye as solution of dye in refrigerant. Further, the present invention relates to methods for introducing dye, methods for solubilizing dye, methods for detecting leaks and methods for producing refrigeration and heat using the compositions described herein.

A plasma display device is provided in which deterioration in brightness of phosphor layers can be avoided. The plasma display device includes a plasma display panel in which a plurality of discharge cells in one color or in a plurality of colors are arranged and phosphor layers are arranged so as to correspond to the discharge cells in colors and in which light is emitted by exciting the phosphor layers with ultraviolet rays. The phosphor layers include blue phosphor, the blue phosphor being composed of an alkaline-earth metal aluminate phosphor containing at least one element selected from the group consisting of Mo and W. The addition of hexavalent ions (Mo, W) in the blue phosphor allows the elimination of oxygen defects in the vicinity of a layer containing Ba atoms (Ba—O layer), the suppression of adsorption of water to the surface of the blue phosphor and the improvement of deterioration in brightness and a change in chromaticity for the respective phosphors and discharge characteristics.

The invention relates to a paper money verification system and a paper money verification method based on the system. The paper money verification system comprises a money verification terminal and a remote server. The money verification terminal comprises a magnetic information authentication module, an ultraviolet fluorescence authentication module, an infrared image acquisition module, a visible light image acquisition module and a first communication module. The remote server comprises a second communication module, an infrared image identification module and a crown word extracting and identification module. The paper money verification method comprises steps of local magnetic information authentication, ultraviolet fluorescence authentication, remote infrared image acquisition and crown word extracting and identification. Accuracy of money verification is improved, and use safety of the paper money is enhanced; the remote server executes the core identification technology, hardware and software of the money verification terminal can be prevented from being updated continuously, and on one hand, the updating efficiency and the updating cost are improved, and on the other hand, the core technology can be ensured to be controlled by the verification side, and the money verification terminal can be prevented from being damaged by a lawbreaker and the technology secret can be prevented from being acquired by the lawbreaker.

The invention discloses an aquatic product parasite ultraviolet fluorescence imaging detection method based on automatic threshold segmentation. The method comprises the following steps: firstly, irradiating an aquatic product by using ultraviolet light and acquiring an ultraviolet fluorescence image of the aquatic product; secondly, preprocessing the ultraviolet fluorescence image of the aquatic product and then segmenting the aquatic product and a surrounding environment background by using a one-dimensional automatic threshold segmentation technology; thirdly, taking the area of the aquatic product as a background and taking parasites as a target to perform two-dimensional automatic threshold segmentation on the obtained image of the aquatic product area so as to separate the aquatic product area from the parasites; finally, extracting a parasite image from the ultraviolet fluorescence image of the aquatic product. The method disclosed by the invention is simple and rapid in algorithm, small in workload, good in consistency, high in efficiency, good in accuracy, also capable of reducing the labor cost and especially suitable for the requirements on large-scale aquatic product processing and production practices.

The invention discloses a method for measuring trace total sulfur by using a pulse ultraviolet fluorescence method. The method comprises the following steps of: adopting a pulse ultraviolet light source to irradiate sulfur dioxide generated by burning a sample periodically in an intermittent way; measuring fluorescence emitted by exciting sulfur dioxide by a detector and further calculating content of sulfur; the wavelength of ultraviolet emitted from the pulse ultraviolet light source is 190 to 230nm; in every period of irradiating sulfur dioxide in an interval way, the irradiating time is 0.8 to 1.2 seconds and the interval time is 4 to 6 milliseconds; and a light screen which moves with constant speed or periodicity is used for screening or permeating ultraviolet light in an alternating way. The method is used for measuring low sulfur in various solid, liquid and gas samples; due to being irradiated by pulse ultraviolet light, the sulfur dioxide generates stable energy source when returning base state from excited state, thus reducing baseline noise of instrument caused by change of energy, and effectively improving sensitivity and accuracy of detection; and the lower limit of detection of sulfur measurement is 10PPb.

A method of detecting UV-light-fluorescent indicia (14) with a camera (18) having a flash (20) and a sensor (22) includes mounting a visible-to-UV light conversion device (24) over the flash, activating the camera to initiate a visible-light flash exposure, converting visible light (17) from the flash to UV light (16) with the conversion device, and capturing a visible-light image of the indicia with the sensor on the camera.

The invention provides a micro-flow control chip machining and detection experiment device based on a digital micro-mirror device, comprising an ultraviolet LED (Light-Emitting Diode) light source, a first double-convex lens, a first reflection mirror, a DMD (Digital Micro-mirror Device), a dichroic mirror, a first microscope objective lens, a three-dimensional electric platform, a second microscope objective lens, a second double-convex lens, a white light LED light source, a second reflection mirror, a light filtering mirror, a third double-convex lens, a CCD (Charge Coupled Display) camera and a computer. The experiment device can effectively work at two modes of photoresist exposure and visible light and ultraviolet fluorescence detection of a micro-flow control chip; and the computer is respectively connected with an ultraviolet LED light source, the white light LED light source, the DMD, the a three-dimensional electric platform and the CCD camera. The micro-flow control chip machining and detection experiment device based on the digital micro-mirror device can realize soft photoetching exposure of a micro-flow-channel pattern in a manufacturing process of the micro-flow control chip and can also realize the real-time visible light and ultraviolet fluorescence detection of trace samples in the micro-flow control chip.

An on-line monitoring method of petrochemical water cooler leakage comprises the following steps that: firstly, a monitoring network which includes a sampling system, a monitoring station, an engineer station and an operator station is established and the sampling system is installed on a circulating water return water pipeline of the water cooler to be monitored; then one or more kinds of an ultraviolet spectrometry monitor, an ultraviolet fluorescence monitor, a fiber monitor and a near infrared monitor is selected to monitor on-line organic matter concentration changes in water according to types of cooling mediums of the water cooler; the engineer station determines the type of leakage medium in the pipeline according to monitoring data and a monitoring scope; the operator station determines the type of the water cooler which occurs leakage and preliminarily determines an area where the leakage water cooler locates according to the types of the leakage medium; finally, a portable monitor is used to search the water cooler which occurs leakage in the leakage area. By using the method, a plurality of monitors and the portable monitor can be used to rapidly determine the leakage water cooler so that potential safety hazard can be eliminated timely. Time for searching leakage points during major repairing can be saved and work loads can be effectively reduced.

The invention discloses a blood identification instrument based on an infrared Raman ultraviolet fluorescence super-continuum spectrum. The blood identification instrument comprises a power supply module, an invisible and infrared spectrum section spectrometer, a two-in and two-out optical fiber, a master control and data analysis system, an integrating sphere, a test tube manipulator, a connecting rod, a guide track, a manipulator motion controller, an outer sample chamber cover plate, a bottom plate, a bracket, an outer light source chamber cover plate, an optical fiber collimation connector, a laser pigtail, a super-continuum spectrum laser, an objective bracket, a microobjective, an objective coupling, an optical collimation lens, a Y-shaped coaxial optical fiber, a first optical fiber coupling, a second optical fiber coupling, a Y-shaped optical fiber and an infrared and ultraviolet narrow linewidth laser. The two-in and two-out optical fiber complex spectrometer is connected by using the Y-shaped optical fiber so as to form the hardware, sectional weighted stack is adopted so as to form the software, and thus data information fusion of an infrared Raman spectrum, an ultraviolet fluorescence spectrum and a super-continuum diffuse comprehensive spectrum can be achieved. The blood identification instrument disclosed by the invention can be applied to automatic identification of whole blood, plasma and serum.

The invention provides a method for analyzing morphological distribution of C5 raw materials and sulfide in fractions; the method comprises the steps: firstly, an ultraviolet fluorescence method is adopted to measure the total sulfur content of a sample; secondly, a potentiometric titration method is used for measuring the sulfur content of sulfide hydrogen and mercaptan in the sample; thirdly, the sample is washed by silver nitrate solution, the ultraviolet fluorescence method is adopted to measure the total sulfur content of the washed sample; finally, the sulfur content of alkyl sulfide is converted by a subtration method; and a Zn-HAc reduction method is used for measuring the sulfur content of disulfide in the washed sample. The invention has the advantages of good repeatability and high precision, effectively solves the problem that the analysis of the sulfide morphology of the C5 raw materials and the sulfide in fractions is difficult due to the complex morphological distribution thereof, and provides technical data support for analyzing the desulfuration, equipment corrosion and the influence of different sulfur morphologies on the production processes.

The invention discloses an ultraviolet fluorescence online detector of oil in water. The detector comprises a probe and an instrument box and is characterized in that a quartz window is arranged at the front end of the probe, and an ultraviolet light-emitting diode and a photosensitive diode are arranged in the probe. An optical filter is arranged at the front end of the photosensitive diode, an included angle between a light beam transmitted by the ultraviolet light-emitting diode and a light beam received by the photosensitive diode is an acute angle, and an ultrasonic generator is further arranged in the probe. A central processing unit (CPU) is arranged in the instrument box, a micro current amplifier connected with the photosensitive diode is connected with the CPU through a data collection circuit board, the CPU is further respectively connected with a wireless data transmission module, a storage and a display screen, the CPU further controls the ultraviolet light-emitting diode through an ultraviolet light-emitting diode driving circuit board and controls the ultrasonic generator through an ultrasonic generator driving circuit board, and a power supply module is further arranged in the instrument box. The ultraviolet fluorescence online detector is simple in structure, ingenious in design, small in size and convenient to carry.

The invention discloses a spectrogram feature extraction algorithm based on kernel principal component analysis, and on the basis, a sparse representation classifier is applied to analyze an astragalus membranaceus spectrogram, so that a method for quickly identifying the production place of astragalus membranaceus is realized. The chemical analysis method adopted by the invention mainly comprisesan ion mobility spectrometry technology and an ultraviolet fluorescence spectrum analysis technology, has the advantages of rapid spectrum collection, good discrimination and the like, and is an important method for rapidly identifying the quality of the Chinese herbal medicine. According to the technical scheme, the method mainly comprises the steps of collection of astragalus membranaceus spectrogram information, extraction of Chinese herbal medicine spectrogram characteristics based on kernel principal component analysis and identification of the astragalus membranaceus production place based on a sparse representation classifier. Experiments show that the method is high in operation speed and high in recognition rate, provides a technical solution idea and scheme for rapid quality identification of Chinese herbal medicines, and has wide application significance.

An analysis method and analysis apparatus involve analysis for a sulfur component using ultraviolet fluorescence capable of removing the interferential influence of NO with good efficiency and certainty to thereby measure a concentration of only sulfur components such as SO₂ and others even in continuous measurement over a long term with a high precision. An analysis method involves analysis for a sulfur component using ultraviolet fluorescence. A sample gas is illuminated with ultraviolet and fluorescence is emitted by the ultraviolet illumination and detected to measure concentrations of sulfur components including at least SO₂ in the sample gas. NO, which is an interferential component in the sample gas, is oxidized to nitrogen dioxide, followed by the illuminating of the sample gas with ultraviolet.

The invention relates to preparation of a core-shell ultraviolet fluorescence molecularly-imprinted material and application of the material in sulfanilamide detection. By using sulfamethyldiazine as a template molecule, the synthesized lysine-based fluorescence molecule as the functional monomer, ethylene glycol dimethyl acrylate as a crosslinking agent and azodiisobutyronitrile as an initiator, the lysine-framework fluorescence functional monomer with FMOC fluorophore is subjected to surface polymerization to obtain an about 10nm imprinted layer on the monodisperse methylacryloylated silicon ball surface with the diameter of 100nm. A Soxhlet method is utilized to remove the imprinted template molecule in the material to obtain the fluorescence molecularly-imprinted sensing material with fluorescence quenching responsiveness to the template molecule; the molecularly-imprinted material has the advantages of favorable dispersity, high response speed and stable optical properties, and is applicable to determining the sulfamethyldiazine content in the marked milk; and the method can indirectly convert the ultraviolet absorption signal of the analyte into a sensitive fluorescence signal, thereby enhancing the detection sensitivity and obtaining favorable recovery rate.

The present invention discloses a quartz tube special for detecting sulfur by impulse type ultraviolet fluorescence method. Sampling tube and sample discharging tube are set respectively on two end of firebox, a diameter accrescent vaporizing cavity is on the end of the sampling tube inserted in the firebox, a buffer tube with one end closed and one end opened is in the firebox, the sample discharging tube extends into the buffer tube and the inside and outside of the buffer tube have clearance, and the exit of said vaporizing cavity is taper ring channel. Because the present invention employs new structure design, it's convenient for sampling in a large, prolonging the circulation time of the sample in the firebox and making the sample burning sufficiently, eliminating remnant carbon and avoiding the quartz tube and correlation gas roads changing black, improving the sulfur detecting efficient. The sulfur detecting lower limit is 10PPb in impulse type ultraviolet method.