145results 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.

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.

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 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.

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.

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.

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.

The invention relates to a method for ascertaining at least one piece of specific information about bulk material. The invention also relates to a method for generating a data item having at least one piece of information about a bulk material, a method for acquiring information about a bulk material, and a database, a device, and a computer-implemented data structure.

According to an example aspect of the present invention, there is provided a sample analyser (1) comprising a rotatable sample carrier (3) in the form of a disc, wherein the rotatable sample carrier (3) is rotatable around an axis of rotation in an operating direction, a stationary perimeter wall (4), wherein the rotatable sample carrier (3) is arranged within the perimeter wall (4), a feeding system (2), wherein the feeding system (2) is arranged to feed sample material onto the rotatable sample carrier (3), a limiter (7), wherein the limiter (7) is arranged above the rotatable sample carrier (3) and spaced apart from the rotatable sample carrier (3) at a distance, at least one sensor (8) for analysing a sample material layer (9), and a guide wall (6) arranged above the sample carrier (3) and extending from the perimeter wall (4) radially inwards, thus forming a passage for the sample material layer (9) between a part of the perimeter wall (4) and the guide wall (6) towards a first exit (5) formed by an opening in the perimeter wall (4).

A vehicle air monitoring system includes a housing defining an interior and an inlet. An airflow assembly is disposed within the interior and includes a pump configured to draw an air sample into an airflow passage via the inlet. A detection assembly is in fluid communication with the airflow passage of the airflow assembly. The detection assembly includes a light source configured to illuminate a biochip and a photodetector configured to detect an optical transmission of the biochip based on a photocurrent of the photodetector. A control assembly is in communication with the airflow assembly and the detection assembly. The control assembly is configured to activate the pump to draw the air sample into the airflow passage, compare the photocurrent by the photodetector with a predefined baseline photocurrent to determine a change in the optical transmission of the biochip, and communicate particle data to a remote device.

To provide a method for determining the positional velocity of particles in a flow stream of a particle analyzer.SOLUTION: Illuminating a sample having particles in a flow stream of a particle analyzer with a first laser of a first interrogation area and a second laser of a second interrogation area, detecting light from the illuminated particles with a first photodetector channel of the first interrogation area and a second photodetector channel of the second interrogation area, calculating a velocity of the particles in the flow stream based on the light detected by the first photodetector and the second photodetector, and determining a parameter of the particles in the flow stream; Based on the calculated velocities and parameters of the particles, the positional velocities of the particles in the flow stream are calculated.SELECTED DRAWING: None

This invention relates to an air quality measurement device, featuring a casing with a main inlet duct formed in a straight line and of a predetermined length or longer to allow air to flow from an inlet at the bottom to the top; a flow meter located at the top of the main inlet duct to measure the airflow rate; a laser module that irradiates a laser beam onto the air flowing along the main inlet duct; a light sensor that measures the amount of light scattered by dust particles contained in the air; and a processor that receives the measured values from the light sensor, performs continuous high-speed sampling, estimates the speed of dust particles based on the changes in light intensity, and uses the speed of particles to derive their mass.

A search device (10) updates positions and momentums of a plurality of virtual particles, for each unit time from an initial time to an end time. The search device (10), for each unit time, calculates, for each of the particles, a position at a target time of a corresponding particle, calculates, for each of a plurality of nodes, a first accumulative value by cumulatively adding positions at the target time of two or more particles corresponding to outgoing two or more directed edges, calculates, for each of the nodes, a second accumulative value by cumulatively adding positions at the target time of two or more particles corresponding to incoming two or more directed edges, and calculates, for each of the particles, a momentum at the target time of a corresponding particle based on the first accumulative value and the second accumulative value.

A system, device and method for deployment of one or more dust accumulation sensors receives a baseline measurement associated with no accumulation of dust in a target environment, receives a time-elapsed measurement associated with positive accumulation of dust in the target environment, determines a quantity of accumulated dust in the target environment based on the baseline measurement and the time-elapsed measurement, generates a spatial dust deposition distribution for the target environment based on the determined quantity of accumulated dust and determines a deployment for one or more dust accumulation sensors for the target environment based on the spatial dust deposition distribution.

Sensor arrangement (1) for detecting particles, comprising: a housing (11) having an air flow channel (11a) through which air flows from the outside of the housing (11) into the housing; a fan drive (15) which is mounted inside the housing (11) and is arranged to flow the air from the outside of the housing (11) into the air flow channel (11a); a light source (21) arranged to emit light to allow the light to intersect with the air flowing into the air flow channel (11a); and a light receiving sensor (25) arranged to receive light scattered by dust contained in the air flowing through the air flow channel (11a), wherein the air flow channel (11a) is designed such that a region in which the air flows into the housing (11) from the outside thereof has a cross-sectional area which is larger than the cross-sectional area of ​​a region in which the light emitted by the light source (21) intersects with flowing air, wherein the housing (11) further comprises: a light path section (22) communicating with the air flow channel (11a) for radiating the light emitted by the light source (21) to the air flow channel (11a), wherein a dust collecting section (23) is formed on the light path section (22), and the dust collecting section (23) is a space formed in a direction perpendicular to the light path section (22), wherein dust collecting sections (23) are provided in multiples to form a plurality of dust collecting sections (23), and wherein the plurality of dust collecting sections (23) are formed at predetermined intervals along the light path section (22), and wherein the plurality of dust collecting sections (23) are shaped so that the cross-sectional area of ​​each of the plurality of dust collecting sections (23) becomes smaller, as the distance between the light source (21) and each of the plurality of dust collecting sections (23) increases.

A method for characterization of metallic powder including presenting a metallic powder sample (202) to a laser and detector system (200), wherein the metallic powder sample (202) passes through the laser and detector system (200) via a sample introducer (201); applying a pulsed laser beam (204) to a first location (203) in the metallic powder sample (202) to provide a first micro-plasma (205) at the first location (203) in the metallic powder sample (202) when the pulsed laser beam (204) terminates, the micro-plasma (205) cools to provide spectral emissions (207) at the first location (203); collecting the spectral emissions at the first location (203) in the metallic powder sample (202) with a detector (209); analyzing the spectral emissions (207) at the first location (203) to provide a spectral analysis dataset; and identifying inclusions at the first location (203) in the metallic powder sample (202).

The invention belongs to the technical field of powder pneumatic conveying, and particularly relates to a method and device for measuring the powder particle picking speed. According to the method, to-be-detected material powder flatly laid on a tray of a mass sensor is placed in a rectangular air pipe, fully developed turbulent airflow in the pipe is created, the air speed in the air pipe is gradually increased, sampling and particle size analysis are triggered according to the change of the weight loss rate of the mass sensor, and the particle size of the to-be-detected material powder is measured. Therefore, the picking speed corresponding to the powder particles with different particle sizes of the material is obtained. According to the invention, the turbulent flow which is completely developed in the pipe is created, and'zero-returning of the weight loss rate 'is taken as a unique triggering condition for sampling, so that the powder particle size interval corresponding to each sampling is accurately determined by the current wind speed, and a reliable and accurate corresponding relation between the wind speed and the particle size is established; and errors caused by manual judgment in a traditional method are overcome.