407 results about "Particle Size Analyzer" patented technology

The invention discloses a spray characteristic parameter detection device and method. The spray characteristic parameter detection device comprises an integral support rack, a two-dimensional moving unit, a servo motor, a servo control unit, a spray control system, a pulse nozzle, a high-speed camera image acquisition system and a laser particle size analyzer system. On the basis of the device, the spray characteristic parameter detection method comprises the following steps: detecting an outline shape of spray, macroscopic two-dimensional distribution of spray and the flying speed of particles of spray by virtue of the high-speed camera image acquisition system; and detecting the particle size of spray with two-dimensional distribution in a spatial two-dimensional plane travel range by a two-dimensional precise servo driving system based on a laser particle size analyzer according to the outline and the macroscopic two-dimensional distribution of spray on the basis of a spray image acquisition result.

Disclosed herein is a method for chemically attaching carboxyl, alcohol, amine or amide groups to the surface of nanodiamond (ND) in a liquid phase. Also disclosed herein are a functional ND compound obtained by the method and use thereof. The method includes treating synthetic ND with a size of 1 nm-1OO nm with sonication and a strong acid to provide ND-(COOH)_n. The ND-(COOH)_n compound is used as a starting material to provide ND compounds having alcohol, amine or amide groups attached to the surfaces thereof. The surface-functionalized ND compounds are characterized by using an X-ray diffractometer, FTIR, AFM, particle size analyzer and zeta sizer. The ND compounds show functionalities as well as high solubility to provide stable ND solutions in a liquid phase. Therefore, the ND compounds may be used as diamond coating agents. The powder of the ND compounds may be used as materials for producing composites of polymers, plastics, synthetic fibers, ceramics, etc., or as additives for toothpaste, shampoos, soap and cosmetic compositions.

The invention discloses a particle size analyzer which is characterized in that a microscope objective is arranged below an area array sensor; a sample tank is arranged on the focusing plane of the microscope objective; two light sources, namely a transmission light source and a scattering light source are arranged below the sample tank; when micron-grade particles are measured, the transmission light source emits illumination light to illuminate particle samples to be detected, particle images are amplified by the microscope objective to be imaged on an image plane, and image signals obtained after receiving of the images by the area array sensor are transmitted to a computer to be processed to obtain particle size distribution; when nano particles are measured, the transmission light source is turned off while the scattering light source is turned on, laser emitted by the transmission light source is irradiated to nano particle samples, dynamic light scattering signals generated by Brownian movement of the nano particles are received by the area array sensor through the microscope objective, and the obtained signals are transmitted to the computer to be processed to obtain the particle size distribution. According to the particle size analyzer, the particles with the size range from nanometers to hundreds of microns can be measured by only one image sensor, so as to meet the requirements of wide-range particle measurement.

The invention discloses a powder average particle size determination method. According to the method, 0.02-0.1g of powder to be measured is weighed and placed into a 50mL beaker; a dispersing agent and deionized water are mixed into a dispersing agent solution with a concentration of 15-25g/L. 2-5 drops of the prepared dispersing agent solution is dropped into the beaker; stirring, wetting, and dispersing are carried out by using a glass rod; 10-20mL of deionized water is added into the beaker; the solution is subjected to ultrasonic dispersing, such that a white suspension liquid is obtained; 1.5-3mL of the white suspension liquid is dropped into a quartz cuvette; and the cuvette is placed into a laser particle size analyzer, such that pearl powder particle size distribution diagram is determined, and an average particle size is calculated. The method provided by the invention can be used for determining average particle sizes of pearl powder, shell powder, and the like. The determination method provided by the invention has the advantages of high testing speed, good repeatability, high accuracy, simple operation, and the like.

The invention discloses a method for extracting hesperidin from tangerine peel. The method comprises: mixing tangerine peel with a solid-phase alkali reagent, wherein the tangerine peel is tangerine peel powder which is ground to have a powder particle size analysis result D90 between 10 and 200 mu m; adding water, stirring, centrifuging and taking supernatant; adding acid to regulate pH between 2.0 and 6.0; standing and then filtering the obtained product; drying a filter cake; and obtaining hesperidin. The solid-phase alkali reagent is one or arbitrary mixture of more than two of sodium hydroxide, aluminum hydroxide, calcium hydroxide, potassium hydroxide, sodium bicarbonate, potassium bicarbonate, sodium carbonate, potassium carbonate, calcium carbonate, sodium silicate, disodium hydrogen phosphate or dipotassium hydrogen phosphate. By adopting a mechanochemical technique to extract and separate the hesperidin, the method has the advantages of high extraction rate, high product purity, simple process, environment-friendly property, low cost and short production cycle, and is an extraction-separation route with broad industrialization prospects.

The invention relates to a smarter-vision-based high-performance ore granularity visual inspection system. Detection steps are as follows: a high-speed and high-definition camera is installed above anore conveyor belt; an ordinary image and an image with structured light of broken ore on the ore conveyor belt can be taken by the camera; information of the ordinary image and the image with the structured light is transmitted to a system host for detection, ore particles are cut, ore granularity information is extracted for statistics and analysis, and the ore granularity information is outputted to a main controller of an ore crusher; the main controller adjusts various control parameters of the ore crusher according to the requirements of the production process, and the ore crusher operates according to new control parameters; after the ore crusher operates according to the new control parameters, the broken ore again appears in the image of the camera, and the closed-loop control ofthe ore crusher is realized. The smarter-vision-based high-performance ore granularity visual inspection system can effectively solve the problems that an ordinary camera can only collect two-dimensional image information, and an ore particle size analyzer cannot distinguish an damaged or water-stained empty conveyor belt from a conveyor belt scattered with the ore, so that the ore granularity information detection and analysis are inaccurate.

A method of determining the constituents and impurities in mixed-color cullet to facilitate use of mixed-color cullet in glass manufacture is provided. A glass batch formulation is adjusted based on the measured characteristics of supplied mixed-color cullet. More specifically, certain preferred aspects of the present invention include the steps of providing quantity of mixed-color cullet, collecting at least one sample of the mixed-color cullet, performing, either singularly or in combination, particle size analysis, particle color analysis, or organics analysis of the mixed-color cullet, optionally storing the analysis results, determining a glass batch formulation, providing the cullet specification and the batch formulation to a glass manufacturer, and adjusting glass batch formulation based on the cullet specification to ensure consistent glass quality.

The invention discloses a method for studying a mechanism that secondary organic aerosol is produced by photo-oxidation transformation of fuel coal. The method comprises the steps: subjecting raw coal to chemical component and particle size analysis via a single particle aerosol mass spectrometer according to the principle of laser ablation; detecting chemical component and particle size distributions of volatile organic matters and particulate matters in fuel coal by using proton transfer reaction mass spectrometry and single particle aerosol mass spectrometry; by using a smog box system, inspecting parameters such as chemical components and particle size of gas and particulate matters in the fuel coal in a photochemical reaction within different combustion times, and their variation trends, analyzing intermediate state data, and comparing data of a static coal erosion experiment and a static coal combustion experiment to obtain the mechanism that secondary organic aerosol is produced by photo-oxidation transformation of fuel coal. The invention also discloses a device. It is possible to simulate transformation processes of the fuel coal in different atmospheric environments, accurately capture intermediate state products of the fuel coal and quantify the effects of coal combustion and post-combustion photo-oxidation.

The invention provides an on-line cement particle size detection method. The on-line cement particle size detection method is characterized in that a laser particle size analyzer is arranged in a material conveying chute of a cement grinding powder selector, a signal control box and a analyzer host are arranged to be in electrical connection with the laser particle size analyzer, cement samples in the shape of single particles are blown into a detection window of the laser particle size analyzer, when laser beams emitted by the laser particle size analyzer encounter cement particles in a propagation process, a part of light deviates from an original propagation direction and is scattered to form a scattering angle, a signal representing the size of the scattering angle and the intensity of scattered light which is output by the laser particle size analyzer is converted into an electrical signal by the signal control box and the electric signal is output to the analyzer host, and the particle size and size distribution of cement can be seen in the analyzer host. The on-line cement particle size detection method provided by the invention has the characteristics of rapid and accurate detection, and wide range; and a device provided by the invention can be used for improving the quality and particle size stability of cement after being used, and reducing the waste of energy consumption caused by quality fluctuation.

The invention discloses a coal-rock identification method based on image LBP. The method comprises the following steps: carrying out different observation and particle size analysis conversion on images to obtain LBP response images of the sample images; carrying out co-occurrence matrix calculation on the LBP response images to obtain gray-level co-occurrence matrixs of the LBP response images respectively; extracting characteristic values of the gray-level co-occurrence matrixs of the LBP response images respectively, and forming feature vectors; forming a characteristic matrix of the images according to the obtained feature vectors of the gray-level co-occurrence matrixs of the LBP response images; and on the basis of the template matching technique, comparing the image to be identified with each template, and the template, of which the matching degree is the highest, being the template of the image to be identified. The method is low in influence of illumination factor, good in stability and high in recognition rate.

The invention discloses an ultrasonic particle size analyzer, which comprises a hardware part and a software part, wherein the hardware part comprises an ultrasonic wave transmitting and receiving device and ultrasonic detection devices which are independent mutually, as well as an oscilloscope and a computer; the software part comprises a plurality of ultrasonic models, five global optimization algorithms and an expert consultation mode. An ultrasonic pulse signal is generated by the ultrasonic transmitting and receiving device, the ultrasonic waves are transmitted to suspension liquid through different ultrasonic detection devices, the amplitudes of the ultrasonic waves are attenuated after the ultrasonic waves are interacted with particles in the suspension liquid, and at different frequencies, the attenuation of the amplitudes is different according to the sizes and volume fractions of particles; particle size distribution and volume fractions of required particles can be obtained after the collected attenuation signal is processed through the computer. The ultrasonic particle size analyzer provided by the invention can perform nondestructive measurement, is rapid, reliable, and particularly suitable for high-concentration non-transparent samples, and samples are not required to be diluted.

A titanium dioxide characterized by having an average particle size of 5 to 200 μm as measured through laser particle size analysis; having a purity of at least 99.5 mass % as reduced to TiO₂; and having an Fe content of 20 mass ppm or less, an Ni content of 20 mass ppm or less, a Cr content of 20 mass ppm or less, an Al content of 20 mass ppm or less, a Zr content of 20 mass ppm or less, an Si content of 40 mass ppm or less, a Cl content of 0.05 mass % or less, and an S content of 50 mass ppm or less. The titanium dioxide is produced by a process comprising bringing titanium dioxide serving as a raw material into a high-temperature flame formed by use of a combustible gas and a combustion-supporting gas, to thereby yield spherical titanium dioxide, characterized in that said raw material titanium dioxide has been produced through a vapor-phase process in which titanium tetrachloride is oxidized with an oxidative gas at high temperature.

A surface modification method comprising bringing, into a high-temperature flame formed by use of a combustible gas and a combustion-supporting gas, inorganic oxide powder A having an average particle size falling within a range of 0.5 to 200 μm as measured by means of laser diffraction/scattering particle size analysis and inorganic oxide powder B having a particle size calculated on the basis of its BET specific surface area of 100 nm or less, to thereby modifiy the surfaces of particles of the powder A by means of the particles of the powder B. A surface modification method comprising bringing, into a high-temperature flame formed by use of a combustible gas and a combustion-supporting gas, the inorganic oxide powder A; and bringing again the resultant powder into the high-temperature flame, to thereby modify the surfaces of particles of powder A.

Belonging to the technical field of particle optical property measuring, the invention provides a spherical particle spectrum complex refractive index measurement method based on short pulse laser transmitted and reflected signals, and solves the problems of complex measuring process and low accuracy still existing in current spherical particle spectrum complex refractive index measurement methods. The method disclosed in the invention uses short pulse laser to irradiate a uniform spherical particle system, measures the reflected signal and transmitted signal of the particle system, employs a particle size analyzer to measure the particle size distribution of the particle system, utilizes a Mie theoretical model and inversion of a particle swarm optimization algorithm to obtain the spectrum complex refractive index of particles. The method provided in the invention is suitable for measuring the spectrum complex refractive index of particles.

An anatase-type ultrafine particulate titanium oxide process, which has low chlorine content compared with conventional titanium oxide having a BET specific surface area comparable to that of the ultrafine particulate titanium oxide. When the ultrafine particulate titanium oxide is subjected to dechlorination, the titanium oxide satisfies the relation between BET surface area (B) and chlorine content (C) represented by the aforementioned formula (2). The ultrafine particulate titanium oxide has a D90 of 2.5 (m or less as measured by means of laser diffraction particle size analysis. The present invention also provides a process for producing the ultrafine particulate titanium oxide.

The present invention relates to an automatic watering control device and method for pelletizing pellets, including a raw pellet belt, a video particle size analysis system, a drip pipe, and an atomizing tube. The video particle size analysis system includes a video camera and an industrial control computer. The video camera is installed on Above the raw ball belt, the camera is connected with the industrial control computer through the data transmission device, and the image signal is transmitted to the industrial control computer, and the industrial control computer is connected with the input end of the PLC. The present invention controls the whole process from the incoming iron powder, the ratio of additives to the granularity of green balls, not only can realize the automatic setting and adjustment of the total amount of water added; The water distribution is adjusted and controlled, which greatly improves the production rate of green pellets and reduces the energy consumption in the pellet roasting process.

The invention discloses nanometer bamboo charcoal powder and a preparation method thereof. The method is characterized in that bamboo charcoal baked by an earth kiln is used, then a high-temperature electric box electric furnace is used for carbonization, the carbonization temperature is between 1,200 and 1,600 DEG C, the carbonization time is between 24 and 48 hours, carbide is crushed by a flat fluid jet mill into the particle size which is less than or equal to 1.5 um, and then the carbide, a coupling agent, an anion surfactant, a non-ionic interfacial agent-sodium polyacrylate salt used as a dispersant, a modified polysiloxane defoaming agent, and deionized water are mixed evenly and then are placed in a two-way rotary ball mill for grinding. The rotating speed of the ball mill is between 4,000 and 4,500r/m, and the grinding time is between 48 and 96 hours. A grinding mixture is diluted by the deionized water, is subjected to ultrasonic treatment, and is tested by a laser particle size analyzer (the measurement range is between 3 and 3,000 nm), the particle size and the particle size distribution are measured by a wet method, and the mixture is regarded not to reach the standard when the particle size is more than 300nm. Then the mixture continues to be ground in the ball mill until the average particle size of the mixture reaches 60 to 300 nm through the detection, and then is dried to obtain the nanometer bamboo charcoal powder.

The invention relates to a dual-channel ultrasonic attenuation signal detection device. Ultrasonic attenuation signals received by two receiving ultrasonic transducers of the device are converted into DC signals capable of being collected by an A/D (Analog-to-Digital) converter through a logical control circuit, a cascade amplifying circuit and an AC modulation circuit. The ultrasonic attenuation signal detection accuracy of the device is not less than 0.1 dB, the ultrasonic attenuation signal detection capacity is in a dynamic range of 94 dB, and thus, the detection accuracy on pulp density and particle size for an ultrasonic online particle size analyzer is increased.

The invention discloses a detection method for particle size distribution of insulator surface dirt. The detection method comprises the following steps that the dirt amount of an insulator surface to be detected is judged; particle size distribution of the insulator surface dirt is measured with a laser particle size analyzer when it is judged that the dirt amount of the insulator surface is no less than a preset amount; an image of the insulator surface is shot with an electron microscope when it is judged that the dirt amount of the insulator surface is less than the preset amount; the image is analyzed to perform statistics on particle size distribution of the insulator surface dirt, and particle size distribution of the insulator surface dirt is measured. According to the detection method, defects of an existing laser particle size analyzer measurement method are overcome, and particle size distribution of the surface dirt of insulators in the regions with the lower pollution level, the shorter dirt accumulating period and the like can be measured and analyzed.

The invention discloses a method for evaluating an insulation aging state of a rubber-plastic cable. The method includes the steps of an aging accelerating step of allowing a large current to flow through an intact rubber-plastic cable under a constant temperature and humidity condition until the main insulation material in the rubber-plastic cable is broken down, letting the total time be T, taking N-1 time points at the same time interval within the total time T, recording the time points as t1, t2, ..., tn-1 sequentially, and letting t0=0 and tn=T; a comparison database establishing step of sampling the main insulation material in the rubber-plastic cable at various time points from t0-tn, conducting a scanning electron microscope test, a laser diffraction particle size analysis, a dielectric spectrum test, a fluorescence spectrum analysis and an X-ray diffraction analysis, a thermogravimetric analysis, an electric pulse test and a tensile test, and establishing the correspondence between the above test or analysis data and the various time points from t0-tn correspondence in a comparison database; and an evaluating step of determining the remaining life of the rubber-plastic cable according to the data of the main insulation material the rubber-plastics cable under test.

The invention discloses an impact risk warning method on the basis of multi-parameter critical coal dust quantity indexes. The impact risk warning method includes drilling 2-3 groups of drilled holes in to-be-warned working regions, recording the weight of drilled coal dust in each meter of each hole, counting the weight of the coal dust with the particle diameter larger than 3mm in each meter of each hole and counting weight proportion of the coal dust with the particle diameter larger than 3mm in each meter of each hole; analyzing coal dust quantity values obtained by means of recording and computing, comparing the coal dust quantity values to critical coal dust quantity values, and predicting whether impact risk warning needs to be carried out on the regions or not according to four warning decisions including dynamic phenomenon records, general critical coal dust quantity analysis, segmented critical coal dust quantity analysis on the drilled holes and coal dust particle size analysis. The impact risk warning method has the advantage that impact risks can be accurately and reliably warned by the aid of the step-by-step warning method.