92results about "Color/spectral properties measurements" patented technology

The invention relates to an infrared spectrum enhancement and detection method and an infrared spectrum enhancement and detection device based on a graphene nano antenna. The device comprises a light source, a collimating lens, a one-point detector and an MEMS (micro-electromechanical system) grating light modulator based on the three-dimensional graphene nano antenna. Infrared light emitted from the light source is irradiated to the MEMS grating light modulator based on the three-dimensional graphene nano antenna through the collimating lens, an interference signal of the MEMS grating light modulator can be detected by the one-point detector, a detection signal is demodulated through Fourier transform, a spectrum is reproduced, and trace molecules are detected according to obtained spectrum information; the device has the advantages of good stability, high response speed, high sensitivity, dynamic tunable broadband, high enhancement factor and the like, can be expected to greatly increase the variety of substances detected by an infrared spectroscopic analysis technology and improve the detection sensitivity of the infrared spectroscopic analysis technology, and has a huge development space and a wide application prospect.

A light source locating and visualization apparatus comprises one or more than one LEDs capable to radiate a red light source with a wavelength of 600˜650 nm to locate superficial veins or specific structures; and a method of locating superficial veins with a LED light source comprises to proceed a skin-tightly radiating by using the source locating and visualization apparatus to emitting a red LED light source with wavelength of 600˜656 nm; to produce a lateral scattering and illumination effect by way of emitting red LED light source penetrating through a fat structure to cause reflection and scattering; and to locate superficial veins by naked eyes due to said superficial veins capable of absorbing red light spectrum easily and appearing as a located blood vessel shadow under the lateral scattering and illumination effect; therefore, physicians and nurse are capable by naked eyes to see the size, curve, and bifurcation of subcutaneous blood vessels visually and then select an appropriate injection position along the blood vessel for intravenous puncture easily.

The invention relates to a method and a device for detecting stored-grain insects. A near infrared super-spectral imaging device for automatically acquiring grain screen underflows consists of five parts including a light box, a lighting unit, a displacement unit, a spectral imaging unit and a computer, wherein the spectral imaging unit comprises an indium-gallium-arsenic near infrared camera, an imaging spectrometer and a near infrared lens. The method for detecting stored-grain insects comprises the following steps of extracting the wavelength of an optimal spectrum synchronously containing data cube of both of live insect and dead insect, and determining the number of the live insects in stored-grain insects and the coordinate information of each live insect in the image; extracting sub-area of the image in which the live insects in the stored-grain insects are located, determining species information of the live insects in the stored-grain insects by identification software according to the near infrared spectrum characteristics of the live insects in the stored-grain insects, and realizing the automatic detection of the stored-grain insects.

The present invention discloses a multi-channel aerosol scattering absorption measuring instrument, comprising a light path device, a detection device and a gas path device. The light path device supplies three different wavelengths of laser entering the detection device in sequence; the detection device is provided with photoelectric detectors at multiple angles for measurement, so as to reduce the measurement error of aerosol scattering coefficient; the gas path device comprises a sample loading unit, a calibration unit and a sample discharging unit; and a light source from the light path device and a gas flow from the gas path device enter the photoacoustic cavity of the detection device respectively and are detected by a control unit. The aerosol scattering absorption measuring instrument of the present invention is characterized by multi-channel, multi-angular, full-scale and direct measurement of scattering phase function and absorption coefficient of aerosol particles, combines the function of synchronously acquiring the optical parameters of an aerosol (such as scattering coefficient, extinction coefficient, visibility, transmittance, single scattering albedo, etc.), and achieves the integrated on-line detection of different optical parameters of an aerosol with high automation degree and good stability.

The invention provides a distributed gas sensing system and a control method thereof. The system comprises a laser device, a gas detection main control board, an optical circulator, a multi-way optical switch and at least one gas detection gas chamber; the gas detection main control board is used for driving the laser device and controlling gating of the multi-way optical switch; the optical circulator is used for transmitting a laser signal outputted by the laser device to the multi-way optical switch, and transmitting a laser signal fed back from the multi-way optical switch to the gas detection main control board; the multi-way optical switch is used for gating a one-way laser signal; and the at least one gas detection gas chamber is used for absorbing spectra and reflecting the laser signal back to the multi-way optical switch; the gas detection main control board is also used for receiving a laser signal outputted by a third port of the optical circulator, and after photoelectric conversion, the gas concentration is calculated. The main control board controls the multi-way optical switch, one laser device controls multiple ways to perform gas detection, and thus the cost of the system is greatly reduced.

The invention discloses a method for comprehensively extracting fucoxanthin and brown alga polyphenol from gulfweed, which comprises the following steps: carrying out repeated freeze-thawing and centrifugation on fresh gulfweed or frozen reserved gulfweed to control the water content of brown alga; adding an organic reagent into the seaweed, leaching in a dark place for 1-24 hours, carrying out vacuum filtration to obtain a leaching solution, repeating the leaching operation until the leaching solution is colorless, merging the leaching solutions, concentrating the leaching solution until abundant precipitate appears in the solution, and filtering to remove the precipitate and obtain the filtrate; crystallizing the filtrate at low temperature, and filtering to obtain fucoxanthin; and adding a fat-soluble solvent into the filtrate, carrying out repeated liquid-liquid extraction until the fat-soluble solvent layer is colorless, merging the fat-soluble solvent layers of multiple extraction processes, and carrying out low-temperature concentration until a greenish yellow solid precipitates in the solution, thereby obtaining the brown alga polyphenol extract. The method has the advantages of high raw material utilization ratio and high extraction efficiency, and is simple to operate.

The invention relates to a rapid center control testing method of Xingnaojing injection. The rapid center control testing method comprises the following steps of: (1) acquiring samples of primary distillate and secondary distillate in the preparation process of the Xingnaojing injection of different batches; (2) testing the areas of the curcuma zedoary diketone, the curcumenol and the Germacrone in the distillate samples and the total liquid phase peak areas by using a liquid chromatographic method, and testing the muscone peak areas in the distillate samples by using a gas chromatographic method; (3) acquiring near infrared spectrum data of the distillate samples; (4) constructing a model; and (5) testing the content of the curcuma zedoary diketone, the curcumenol, the Germacrone and the muscone in unknown distillate samples.

A method for diagnosing water-core disease of fruit based on character band of visible near-infrared spectrum includes shining light on surface of fruit, using a numbers of photosensitive transducers to collect spectrum reflectivity information of fruit internal at various character bands, removing off noise of said information, inputting information to monolithic computer through A/D converter, inputting processed information to spectrum model of water-core disease for obtaining diagnosis result of water-core disease and using display to indicate out diagnosis result.

The invention discloses an on-line control method for a preparation process of fructus gardenia. In order to solve the technical problem of lack of objectivity caused by taking the personal experience in observation of color as a sole control method in the preparation process of the traditional Chinese medicine fructus gardenia in the prior art, the invention introduces a technique capable of accurately quantifying traditional Chinese medicine appearance and color and a method for directly measuring color of fruit peels and seed kernels of various fructus gardenia decoction pieces. The method is characterized by quantifying the color data, carrying out statistical calculation, determining a mathematic discrimination function of the fructus gardenia and applying the function to the on-line control of the preparation process of the fructus gardenia decoction pieces. When the method is applied to the on-line production of the fructus gardenia, the stability of the quality of the ructus gardenia decoction pieces can be ensured; the method has the advantages of objectivity, rapidity and reliability; the technical problem of lack of objectivity caused by artificial judgment in the prior art can be solved.

The invention discloses an integration micro-fluidic chip for immune analysis research. The chip is mainly composed of a concentration gradient generation unit, an equal allocation unit and a micropore reaction chamber matrix with the diameter of 5.8mm and the depth of 100 mu, and has small volume and large specific surface area; the arrangement of the micropore reaction chamber matrix is consistent with the arrangement of a traditional porous plate, and the micropore matrix can be applied to a standard microplate reader for detecting and gathering analysis data. According to the invention, the operations of absorption and fixation of antibodies, antigens and enzyme during immune analysis operation, the preparation of sample solutions with different concentrations, liquid replacement, washing and the other operations are all integrated on a chip and are completed automatically according to the process creatively; the reagent consumption can be lowered obviously; the analysis time can be shortened; and the efficiency can be improved. Compared with the traditional porous plate technology, according to the invention, the complex manual operations of sample solution preparation, washing and the like are omitted, and the integration micro-fluidic chip for immune analysis research is compatible with the standard microplate reader on the detecting method.

The invention provides an optical fiber sensor for simultaneously measuring the concentration and temperature of hydrogen gas. The optical fiber sensor comprises a light source part, a light transmitting part, a sensing part, a gas supply part and a photodetector part; the sensing part comprises an optical fiber environment and a photonic crystal optical fiber, wherein the optical fiber environment comprises a 3dB coupler and a high-birefringence optical fiber; the sensing part is arranged inside the gas supply part; an output end of a broadband light source and an input end of an optical spectrum analyzer are connected with the 3dB coupler respectively through single-mode optical fibers; two ends of the high-birefringence optical fiber are connected with two ends of the 3dB coupler respectively through single-mode optical fibers; and the single-mode optical fiber for connecting the optical spectrum analyzer with the 3dB coupler is connected with a section of photonic crystal optical fiber, the periphery of the photonic crystal optical fiber is coated with a hydrogen-sensitive film, and subsidence areas are arranged at two ends of the photonic crystal optical fiber respectively. The combination of the optical fiber environment and the photonic crystal optical fiber can realize high-sensitivity and remote real-time detection of the concentration and temperature of a gas, and increase the safety of monitoring the hydrogen gas.

The invention discloses a full-spectrum detector for rapidly detecting foods and a detection method of the detector. According to the full-spectrum detector, the output end of an ARM (Advanced RISC Machines) embedded type system is connected with a power stabilizing circuit, a broadband light source and an illumination optical fiber in sequence, wherein incident light transmitted by the broadband light source is irradiated to a solution to be tested in a sample tank through the illumination optical fiber and is partially absorbed by the solution to be tested to obtain emergent light; the emergent light is led into a full-spectrum light-splitting light path by a measurement optical fiber to be subjected to light splitting and then is irradiated to a CCD (Charge Coupled Device) detector; the CCD detector is used for detecting the light-split emergent light and sending detection data to a signal acquisition circuit; the signal acquisition circuit is used for processing measurement data to obtain full-spectrum information and sending the full-spectrum information to the ARM embedded type system; the ARM embedded type system is further connected with a data storage chip and a display module. The full-spectrum detector is small in volume, compact in structure and convenient to carry, can be used for measuring accurately and can be widely applied to field detection on the foods.

The invention discloses a high-salinity-resistant nucleic acid sensor for copper and application thereof. The sensor comprises a molecular recognition element, a signal multiplication element and a signal conversion element, wherein the molecular recognition element comprises copper ion deoxyribozyme; the copper ion deoxyribozyme consists of a substrate chain and an enzyme chain; the signal multiplication element comprises an isothermal amplification system; the isothermal amplification system comprises an amplification template; the signal conversion element comprises hemin and a color developing agent. The sensor provided by the invention is used for specifically recognizing a copper ion; the primary enlargement and conversion of a signal are carried out through an isothermal index multiplication reaction; a G-four-chain body structure with activity is formed under the induction of the hemin; the color developing agent is catalyzed to develop a color, thus, secondary multiplication and conversion are generated; the signal is converted into a visual signal, and the qualitative and quantitative detection in a high-salinity environment can be carried out.

The invention provides an emission spectrum background correction method, which includes the following steps: a blank background spectrogram, which includes m spectrogram data, is acquired; a sample spectrogram with continuous background interference, which includes m spectrogram data corresponding to the spectrogram data of the blank background spectrogram, is acquired; n sample background spectrum data are screened from the sample spectrogram, n corresponding data are screened from the blank background spectrogram to serve as blank background spectrum data for correction, m is greater than or equal to n, and m and n are positive integers; according to the sample background spectrum data and the blank background spectrum data for correction, fitting is carried out, so that a correction relation is obtained; the blank background spectrogram is inputted into the correction relation to carry out correction, so that an estimated background of a sample is obtained; the estimated background is subtracted from the sample spectrogram, and thereby a clean signal spectrogram is obtained. By sampling and fitting background spectrogram intensity, the method obtains the correction relation to correct the background spectrogram, and after the corrected background spectrogram is subtracted, the measuring precision of the obtained signal spectrogram is greatly increased.

The invention discloses a colorimetric probe compound containing carbazole-antipyrine Schiff base for detecting Cr3+ and Cu2+ as well as identifying naked eyes and preparation method thereof. The Schiff base derivative containing carbazole group is obtained by condensation reaction of aldehyde group based on carbazole and amino group in 4-amino antipyrine, and the molecular characteristic is that the Schiff base compound structure contains N-substituted antipyrine group and -C=N group and carbazole group; the probe compound comprises Schiff base derivatives containing C=N structure, simultaneously the molecule contains O and N and other coordination atoms, which can form coordination molecules with some metal ions, thereby generating special UV and fluorescence phenomenons. The compound can realize identifications of Cu2+/Cr3+ ions and quantitative determination by UV-visible spectrophotometry method, and can be used as a colorimetric probe for identifications of Cu2+/Cr3+ according to obvious color changes, moreover, with the existences of other ions, the product has the advantages of good interference resistance, high selectivity and sensitivity.

The invention discloses a calibration optical system based on a geosynchronous orbit differential absorption spectrometer. The calibration optical system is composed of an oscillating mirror system, afront optical system, a solar diffuse reflection plate assembly and a solar light blocking door assembly. The oscillating mirror system is composed of a pointing mirror, a sweeping shaft system, a motor harmonic group and an oscillating mirror U-shaped bracket. The front optical system consists of a primary mirror, a secondary mirror, a third mirror, a plane mirror and a slit. The solar diffuse reflection plate assembly consists of a Teflon diffuse reflection plate and corresponding structural components. The solar light blocking door assembly includes a solar baffle and a motor assembly. Thecalibration optical system introduces a bidirectional reflection distribution function of external solar illuminance with known spectral irradiance at suitable on-board calibration time, thereby accurately measuring the diffuse reflection plate and establishing an approximate lambertian surface source with known spectral radiance to provide known radiation input for a remote sensor. The system has high measurement accuracy, compact volume, light weight and high reliability.

The invention provides a method for manufacturing a digital printing small-color-difference color correction color card. The method comprises the following steps of establishing a color characteristicfile of a jet printing machine; determining the basic color of the small-color-difference color correction card; determining the extended color of the small-color-difference color correction card; manufacturing a color correction card with small chromatic aberration; and carrying out jet printing output on the small-color-difference color correction color card. According to the invention, the defect of poor color guidance of the color card after the color correction card is manufactured by changing RGB components in the prior art is overcome; The problems that the color difference between adjacent colors is unclear, color lumps are inconvenient to retrieve, and the matching effect of the color card and the fabric is poor are solved, the color card is scientific and simple to manufacture,the color of the color lump is accurate, retrieval is convenient, the color correction precision is greatly improved, and the period and time of digital printing color correction are shortened.

The invention discloses an online monitoring system for a sulfur hexafluoride switch. The online monitoring system comprises a first gas sampling device which is connected with a sulfur hexafluoride switch to be detected by a gas fetching pipe, wherein the gas fetching pipe is provided with a gas fetching valve; the gas sampling device is connected with a laser gas analyzer by an optical fiber. The online monitoring system for the sulfur hexafluoride switch comprises the gas sampling device which is connected with the sulfur hexafluoride switch to be detected by the gas fetching pipe; the gas sampling device is connected with the laser gas analyzer by the optical fiber; the operated SF6 switch is monitored by monitoring and analyzing the concentration of SF6 gas in the operated SF6 switch. The monitoring system adopts a laser technology to monitor the concentration of the gas, is simple in structure and is low in cost; meanwhile, the monitoring accuracy is improved.

The invention discloses synthesis of a probe detecting a copper ion (Cu<2+>) and a nickel ion (Ni<2+>) by a colorimetric method, and an application in detection of Cu<2+> and Ni<2+> in a water sample.A structural formula of the molecular probe is as follows as shown in the specification. The molecular probe can give different complex reactions with Cu<2+> and Ni<2+> in an aqueous solution to showdifferent colors so as to achieve the purpose of simultaneously detecting Cu<2+> and Ni<2+> by colorimetry; a detection solution is changed to bright red from yellow after complexing of the probe andCu<2+>; the detection solution is changed to purple after complexing of the probe and Ni<2+>; a color change is obvious; a detection speed is high; and the differentiation is easy. High-sensitivity detection of Cu<2+> and Ni<2+> can be achieved in combination with ultraviolet spectrophotometry; the probe can directly detect a micro level of Cu<2+> and Ni<2+> in the water; and the limits of detection are as low as 2.1nM and 1.2nM respectively. When a pH (potential of hydrogen) is 4-10, the probe can highly sensitively detect Cu<2+> and Ni<2+> in the water sample, is simple to operate and goodin selectivity and has a higher application value in the fields of environmental science, analysis, detection and the like.