216results about "Particle and sedimentation analysis" patented technology

An aircraft includes a gas turbine engine and an optically-based contrail control system. The gas turbine engine is configured to ingest a first mass flow and to exhaust a second mass flow. The optically-based contrail control system is configured to determine an amount of scattered energy contained in the second mass flow and to determine flow characteristics of the second mass flow based at least in part on molecular components contained in the second mass flow. The optically-based contrail control system determines a level of emissions exhausted from the gas turbine engine based at least in part on a combination of the amount of scattered energy and the flow characteristics.

The present invention relates to a system and method for analyzing foreign substances in a positive electrode material, the system includes a pretreatment part configured to prepare a monolayer sample of a positive electrode material powder, a measurement part configured to obtain an optical image of the monolayer sample using an optical microscope, and an analysis part configured to analyze the optical image of the monolayer sample, thereby obtaining information on foreign substances in the positive electrode material.

The invention relates to the technical field of real-time monitoring, in particular to a real-time monitoring method and system for a particle medicine processing process, and the method comprises the following steps: setting a fixed time interval based on photoacoustic signal data in the particle medicine processing process, capturing photoacoustic signals of a particle medicine under the conditions of thermotropic photoacoustic excitation and pressure-induced photoacoustic excitation, and determining the photoacoustic signals of the particle medicine according to the photoacoustic signals; and recording the amplitude of the photoacoustic signal to obtain a photoacoustic signal feature data set. According to the method, continuous monitoring of the particle medicine forming process is achieved through photoacoustic signal capturing at a fixed time interval, and thermal-induced and pressure-induced photoacoustic excitation is combined, so that the signal collection coverage degree is improved, the photoacoustic holographic image contrast ratio is adjusted, the trace component recognition precision is improved, the peak offset rate is analyzed, and noise baseline fluctuation is compared; abnormal time points are accurately screened, the accuracy of interface change detection is improved, particle trajectory data are obtained in combination with high-frame-rate imaging, flow field disturbance distribution is analyzed, accurate control over the machining process is achieved, and stable particle quality is ensured.

Means for rigorous quantitative assessment of sperm motility are presented, based on a number of movement and morphology parameters measured using various image processing methods. The quantitative assessment thereby achieved is objective and multidimensional, allowing for detailed and repeatable assessment of samples. Deep learning methods are also disclosed for detection and classification of sperm cells (or other types of cells or particles) using neural networks, adapted to work both in good and in poor imaging condition, such as low magnification and resolution. Specific methods for both supervised and unsupervised deep learning approaches are delineated. In a non-limiting disclosure, the methods are particularly adapted to deal with cases of azoospermia, where there is a very low number of sperm cells (most of which do not swim) and a lot of debris in the imaged field of view.

The invention discloses a vector flow velocity measuring device and method based on a bidirectional scanning spectral domain optical coherence tomography technology. Comprising a super light-emitting diode light source, an optical fiber coupler, a polarization controller, an interferometer comprising a sample arm and a reference arm, and a collimating lens, the collimating lens, the grating, the focusing lens group and the linear array camera are sequentially connected through a light path; the linear array camera, the computer and the two-dimensional galvanometer are sequentially connected through a line; according to the method, the fixed bias vector velocity is introduced by utilizing the bidirectional scanning technology, the dynamic light scattering optical coherence tomography method and the Doppler optical coherence tomography method are combined, decoupling of each parameter of the vector flow velocity is efficiently and accurately realized, and a quantitative index is provided for vector flow velocity analysis. The vector flow velocity measuring device based on the bidirectional scanning spectral domain optical coherence tomography technology is simple in system setting and low in cost, the time resolution is improved by about 2.5 times, and the measuring time is shorter.

The invention relates to the field of explosion-proof lamps, in particular to an LED explosion-proof lamp which comprises an explosion-proof lamp shell, a light source cavity is formed in the explosion-proof lamp shell, a light source plate is arranged in the light source cavity, and a plurality of cooling fins are fixedly connected to the top end of the explosion-proof lamp shell in an annular array mode. A power supply cavity and a wiring cavity are formed in the power supply shell; the dust concentration detection mechanism is used for detecting the dust concentration in the air; according to the explosion-proof lamp, the dust concentration detection mechanism, the potentiometer and the processor are arranged, the potentiometer adjusts the brightness of the light source plate according to the dust concentration detected by the dust concentration detection mechanism, so that the brightness of the explosion-proof lamp is enhanced when the dust concentration is large, the working environment brightness is improved, and workers can conveniently observe the environment; when the dust concentration is small, the brightness of the explosion-proof lamp is reduced, the power consumption is reduced, the heating value of the explosion-proof lamp is reduced, and the service life of the explosion-proof lamp is prolonged.

A fine dust measurement system includes a video photographing device that photographs a target place, generates a converted image or converted data by converting all or a portion of the photographed image and transmits the converted image or converted data, and a fine dust measurement that receives the converted image or converted data from the video photographing device, and trains a deep learning model to output a fine dust concentration of the target place by inputting the received converted image or converted data into the deep learning model.

The invention provides a speed field and temperature field synchronous measurement method based on temperature-sensitive phosphorescent particles, and relates to the technical field of flow field observation.The method comprises the steps that the service life of the temperature-sensitive phosphorescent particles is measured, and a service life-temperature curve is obtained; obtaining a time sequence image of the temperature-sensitive phosphorescent particles; performing three-view separation processing on the time sequence image to obtain a processed image; performing three-dimensional reconstruction and trajectory fitting operation on the processed image to obtain a three-dimensional velocity field; acquiring a red total-resolution image of the temperature-sensitive phosphorescent particles irradiated by the light source; calculating the temperature-sensitive phosphorescent particle intensity of the red full-resolution image, and obtaining the self-luminous lifetime through the temperature-sensitive phosphorescent particle intensity; a three-dimensional temperature field is obtained through the service life-temperature curve and the self-luminous service life; and fusing the three-dimensional velocity field and the three-dimensional temperature field to obtain a three-dimensional velocity-temperature field. According to the method, the stability of reconstructing the three-dimensional velocity field and the precision of temperature measurement are improved through the three-color mask single-color camera and the service life method of the temperature-sensitive phosphorescent particles.

An apparatus and method for detecting substances and microorganisms, the apparatus comprising at least one sample reservoir having a sample inlet and a sample outlet for containing a sample consisting of a liquid, a substance and a microorganism; at least one liquid tube connected to the sample outlet of the sample reservoir, where the liquid tube includes a plurality of microscope slides embedded therein, a plurality of image magnification devices located above or below the microscope slides, and a light source for emitting the sample on the plurality of microscope slides; and a control unit having computer software and algorithm programs for managing the operation of the apparatus and identifying and classifying the samples, where the control unit is in electrical communication with the at least one sample reservoir and the at least one liquid tube.

A system for electronically and optically monitoring biological samples, the system including: a multi-well plate having a plurality of wells configured to receive a plurality of biological samples, each of the wells having a set of electrodes and a transparent window on a bottom surface of the well that is free of electrodes; an illumination module configured to illuminate the wells; a cradle configured to receive the multi-well plate, the cradle having an opening on the bottom that exposes the transparent windows of the wells; and an optical imaging module movable across different wells of a same multi-well plate to capture images through the windows.

Methods, systems, and apparatus, including computer programs encoded on a storage device, for determining characteristics of particles are disclosed. A system includes a conveyor belt, wherein a first section of the conveyor belt comprises one or more mechanisms arranged to create environmental conditions favorable to sensor reading. The system includes a sensor rig located proximate to the first section of the conveyor belt comprising a plurality of different types of sensors. The system includes a controller configured to: obtain measurement data from the plurality of different types of sensors; apply the measurement data to a machine learning model configured to determine surface chemical characteristics of particles given measurement data; and output the surface chemical characteristics of particles from the machine learning model to one or more components along the conveyor belt.

Provided herein is a method of detecting microorganisms in liquid samples using image features, such as time profiles of object light scattering intensity and time profiles of object position. Related methods, devices, systems, and other aspects are also provided.

The invention relates to a rainfall infiltration and leakage undercutting same-direction force application soil cavity visualization physical device and method, and the device comprises an intelligent rainfall module, a pipeline leakage module, an optical tracking and tracing monitoring module, a control platform, a data collection module, and a stratum model module. The intelligent rainfall module and the pipeline leakage module are integrated into the control platform; the pipeline leakage module implements nearly real pipeline operation according to a starting device which inputs real pipeline operation conditions; the optical tracking and tracing monitoring module is arranged in the stratum model module; the control platform controls the actions of the intelligent rainfall module and the pipeline leakage module, and then the rainfall and leakage conditions of the stratum model module are detected; and the acquisition module is connected with the optical tracking and tracking monitoring module. According to the invention, the real process of adhesion-migration-movement-emigration of soil particles around the pipeline under the action of rainfall infiltration force and leakage undercutting force in the same direction can be captured, and tracking from microscopic movement to light and shadow phase color change of the soil particles is realized.

Means are presented for the accurate quantitative assessment of sperm motility based on several kinematic and morphological parameters measured using various image processing methods. The quantitative assessment thereby achieved is objective and multi-dimensional, allowing for the evaluation of detailed and repeatable samples. A deep learning method for detecting and classifying sperm cells (or other types of cells or particles) is also disclosed, using a neural network adapted to function under both good imaging conditions and adverse imaging conditions such as low magnification and low resolution. Specific methods for both supervised and unsupervised deep learning approaches are described. In a non-limiting disclosure, the method is adapted to address cases of azoospermia, in particular where the number of sperm cells is very low (most of which are not swimming) and there is a lot of debris in the imaging field of view.

The present disclosure relates to a system and method for evaluating the cleanliness of a road. The system includes a first dust monitoring device, which is arranged at the roof of a vehicle and is configured to monitor first monitoring data of dust at the roof of the vehicle during driving; a second dust monitoring device, which is arranged at the rear of the vehicle and is configured to monitor second monitoring data of dust at the rear of the vehicle during driving; and an evaluation device, which is configured to: determine the dust emission factor of the road based on the first monitoring data, the second monitoring data and the vehicle information of the vehicle; and calibrate the dust emission factor to obtain the dust load of the road to evaluate the cleanliness of the road. Using the disclosed solution, accurate dust load data can be obtained, which is conducive to accurately evaluating the cleanliness of the road.

The invention belongs to the field of dust monitoring, and provides a grading and time-sharing monitoring and evaluation method for multi-scale cutting dust of a composite material. According to the method, a flow field change condition and dust distribution information in a processing area are obtained based on a one-way coupling analysis method of computational fluid dynamics and a discrete element method, and then graded point distribution of a dust sensor is guided; through the monitoring method of grading point distribution, stable and accurate collection of cutting dust information of different scales is realized, and the monitoring efficiency is improved; real-time automatic monitoring in the machining process is achieved through a time-sharing operation monitoring method; based on a data fusion technology and according to the three dust evaluation indexes, graded and time-sharing scientific evaluation of the multi-scale dust contact level of the workplace is realized.

The invention belongs to the technical field of wind-powder concentration measurement of high-concentration pulverized coal, and discloses a wind-powder online measurement system suitable for high-concentration pulverized coal. According to the invention, a capacitance method and sound wave method double-channel pulverized coal concentration measurement mode is set, abnormal condition identification and comprehensive pulverized coal concentration output are carried out based on measurement results, and errors of a single method are avoided through mutual verification of the two methods and comparison of deviation identification anomalies based on the measurement results; the advantages of the two methods are combined, the measurement precision is improved, and the anti-interference capability and long-term operation stability of the system are enhanced. A device surface hanging material dynamic cleaning mechanism is set, the surface hanging material thickness of a capacitive sensor and an ultrasonic detection device is monitored in real time through a CCD imaging device, and cleaning operation is dynamically executed with the average hanging material thickness and the proportion of the number of monitoring points exceeding the threshold value as trigger conditions. Measurement errors can be reduced, long-term stable operation of equipment is guaranteed, and system reliability is improved.

The invention discloses an erodible substrate particle flow process simulation system and an experimental method. The system comprises a chute system, an erodible substrate simulation system and a control and data acquisition system. The chute system achieves speed acquisition and deposition of particle flow through a material bin, a gate, a chute section and a deposition platform. The erodible substrate simulation system simulates flowing particles and erodible substrates, and uses fine supporting rods to connect the substrate particles so as to simulate the erosion effect. The control and data acquisition system monitors and records the flow process through a three-axis force transducer, a 3D scanner and a high-speed camera, and the processing module is responsible for data receiving and processing. According to the invention, the experimental simulation of the whole process of the erodible substrate particle flow can be effectively realized, the interaction between the particle flow and the erodible substrate can be accurately simulated, the particle flow process and the change of the final deposited erodible substrate can be monitored, and the quantitative three-dimensional multi-angle data acquisition and transmission can be realized; and a technical support is provided for a complicated erodible substrate particle flow project.

The present invention relates to a method, device and computer-readable storage medium for monitoring road dust pollution. The method comprises obtaining a measured value of road surface dust concentration and a measured value of air dust concentration at a certain speed; calculating a first difference between the measured value of road surface dust concentration and the measured value of air dust concentration; comparing the first difference with a second difference corresponding to the same speed in a road dust standard, and determining the road dust pollution according to the difference between the first difference and the second difference. The road dust standard comprises calculating the first difference between road surface dust concentration and air dust concentration corresponding to different speeds according to the road surface dust concentration, air dust concentration and speed corresponding to different speeds in historical data, fitting a curve with the first difference and the speed, and determining the road dust standard according to the curve. Through the scheme of the present invention, the problem that the urban road pollution evaluation method cannot provide correct guidance for environmental protection and sanitation operations is solved.

System for recording data on allergic reactions of a vehicle occupant, comprising a recording and / or storage device (5, 30) by means of which pollen in the area of ​​the vehicle (1) can be recorded and / or stored, wherein the recording and / or storage device (5, 30) has an electrically controllable pollen inlet (34) with which the pollen recording can be controlled.

According to embodiments of the present invention, an optical sensor is provided. The optical sensor includes a single piece of optical fiber including a modified fiber tip and a distal end opposite to the modified fiber tip. The distal end may be configured to optically communicate with an external light source and an external detector. The modified fiber tip may be configured to be positioned within a turbid medium to deliver light from the external light source to particles in the turbid medium, at least minimize the light being back reflected at the modified fiber tip and receive backscattered light from the particles for determining a real-time fluid property of the particles in the turbid medium by the external detector. According to further embodiments of the present invention, an optical apparatus, an optical arrangement, and a method for determining a real-time fluid property of the particles are also provided.

The invention relates to an experimental device for coupling optical acting force and suspension liquid optical nonlinear measurement, which comprises a laser control module and a microscopic imaging module, and the laser control module and the microscopic imaging module are respectively arranged in two orthogonal directions of a suspension liquid; the suspension liquid is placed in a transparent sample pool; the laser control module comprises a laser, a beam expander, a focusing lens, an imaging lens and a light beam analyzer which are arranged in sequence; the sample cell is positioned between the focusing lens and the imaging lens; the microscopic imaging module comprises a light source, a lighting lens, an imaging lens and an imaging camera which are arranged in sequence; the sample cell is located between the illumination lens and the imaging lens. Compared with the prior art, the device is provided with the laser control module, so that backward acting force for inducing particles in the suspension can be formed, and meanwhile, the focusing nonlinear effect in the suspension can be researched; and the microscopic imaging module can record moving images of particles in the suspension for subsequent analysis.

The present invention relates to an in-situ maintained dust concentration detection device and method using a non-powered light scattering method, and belongs to the technical field of dust concentration detection. The device includes a metal housing, an insulating carrier, a laser, a photodiode and a light trap, a filter, a light shield and a signal processing board; the filter is installed at the bottom of the photodiode; the light shield is connected to the insulating carrier and installed at the outer end of the light scattering area, and can be removed at any time to facilitate cleaning of dust particles on the surface of the laser and the filter. The detection device calculates the dust concentration value by combining the short-time difference typing data processing algorithm in the digital signal processing unit of the single-chip microcomputer. The calculation method can remove the interference of natural light and achieve accurate characterization of the dust concentration. The structure of the present invention has the advantages of easy maintenance, openness, and non-power, and can achieve accurate detection of dust concentration.

An analyte detection assembly (1) comprising a housing chamber (2), a separation device (3) housed within the housing chamber (2) and a collection screen (4) also housed within the housing chamber (2). The separation device (3) comprises: (a) a plurality of circular filters (5) which in use are arranged together in coaxial positions along a vertically disposed X axis; and (b) a cylindrical side wall (6) within which the plurality of circular filters (5) are housed and on which is provided at least one openable window (8) which is disposed at one or more of the circular filters (5). Each circular filter (5) has a lower filtration capacity than the circular filter located below it and the circular filters (5) are adapted to rotate about the X axis. The collection screen (4) comprises a collection surface (9) facing the plurality of windows.

Aspects of the present disclosure include methods for determining positional velocity of a particle in a flow stream of a particle analyzer. Methods according to certain embodiments include irradiating a sample having a particle in a flow stream of a particle analyzer with a first laser in a first interrogation region and a second laser in a second interrogation region, detecting light from the irradiated particle by a first photodetector channel in the first interrogation region and by a second photodetector channel in the second interrogation region, calculating a velocity of the particle in the flow stream based on the light detected by the first photodetector and by the second photodetector, determining a parameter of the particle in the flow stream and calculating a positional velocity of the particle in the flow stream based on the calculated velocity and the parameter of the particle. Systems and non-transitory computer-readable storage media configured to carry out the subject methods are also provided.

The invention provides a microparticle collision erosion experimental device and method. The experimental device comprises an air heater, a powder mixing mechanism and a powder spraying device, the powder mixing mechanism comprises a hopper and a powder mixer, the powder mixer is provided with a three-way pipe structure, a straight pipe is connected with an air heater and a powder spraying device, the free end of a side pipe is directly connected with the hopper, and hot air and microparticles are mixed in the powder mixer; a flow controller is arranged in the hopper, and the amount of microparticles entering the side pipe can be controlled by adjusting the height of a plugging rod in the flow controller; the micro-pore plate is arranged in the hopper, micro-pores in the micro-pore plate cannot enable the micro-particles to pass through, the air inlet channel is formed between the micro-pore plate and the bottom plate of the hopper, compressed air applied into the air inlet channel can be sprayed out from the micro-pores, the micro-particles above the micro-pores are boiled, the micro-particles at the bridging position are collapsed, and then the micro-particles smoothly enter the side pipe. The experimental device can overcome the defects that in the prior art, equipment is complex in structure, energy is wasted, the environment is polluted, and operation is difficult.

Provided herein is a method of detecting microorganisms in liquid samples using image features, such as time profiles of object light scattering intensity and time profiles of object position. Related methods, devices, systems, and other aspects are also provided.

A method, comprising: determining electrophoretic mobility associated with a particle in a transverse alternating force microfluidic channel; determining a size of the particle based at least in part on one of Brownian motion of a particle or one or more images of the particle. A system comprising: a microfluidic channel; a plurality of electrodes oriented transverse to the microfluidic channel, the plurality of electrodes comprising an alternating electric field; and a classification system configured to: determine one or more of the following: an electrophoretic mobility associated with a particle in the transverse AC microfluidic channel and / or determine, based at least in part on the electrophoretic motion, and size from image analysis or Brownian motion of a particle or one or more images of the particle, particle shape, particle deformability, for recognition of surface characteristics, such as assaying for receptors and ligands, and to perform electroporation.

A method for characterization of metallic powder including presenting a metallic powder sample to a laser and detector system, wherein the metallic powder sample passes through the laser and detector system via a sample introducer; applying a pulsed laser beam to a first location in the metallic powder sample to provide a first micro-plasma at the first location in the metallic powder sample when the pulsed laser beam terminates, the micro-plasma cools to provide spectral emissions at the first location; collecting the spectral emissions at the first location in the metallic powder sample with a detector; analyzing the spectral emissions at the first location to provide a spectral analysis dataset; and identifying inclusions at the first location in the metallic powder sample.

According to embodiments of the present invention, an optical sensor is provided. The optical sensor includes a single piece of optical fiber including a modified fiber tip and a distal end opposite to the modified fiber tip. The distal end may be configured to optically communicate with an external light source and an external detector. The modified fiber tip may be configured to be positioned within a turbid medium to deliver light from the external light source to particles in the turbid medium, at least minimize the light being back reflected at the modified fiber tip and receive backscattered light from the particles for determining a real-time fluid property of the particles in the turbid medium by the external detector. According to further embodiments of the present invention, an optical apparatus, an optical arrangement, and a method for determining a real-time fluid property of the particles are also provided.