19 results about "Aerosol sampling" patented technology

This invention relates to the field of aerosol monitoring technology, specifically to an aerosol classification and identification system based on graded filtration and multi-optical parameter detection. The system includes an automatic membrane-changing graded filtration device, a sampling gas path switching device, an optical detection module, and a data processing and control device. The automatic membrane-changing graded filtration device loads multiple nucleopore membranes of different pore sizes and automatically switches them sequentially to achieve stepwise particle size separation of aerosol samples. The optical detection module integrates a cavity ring-down spectroscopy unit and an integrating sphere scattering measurement unit sharing a single laser light source, simultaneously measuring the extinction coefficient and scattering coefficient of the same graded sample. The data processing and control device constructs a matching feature vector based on the current filter membrane pore size and the calculated absorption coefficient, single-scattering albedo, and other optical parameters, compares it with an optical fingerprint database, and outputs the particle type identification result. This invention solves the technical problem of effectively distinguishing mixed aerosol components through dual-dimensional synergistic analysis of particle size and optical parameters, achieving accurate identification of aerosol particle types.

This invention relates to the fields of environmental monitoring and biosafety technology, and in particular to a viral aerosol sampling patch for face masks, comprising: a capture layer for intercepting viral aerosol particles in the air; a culture layer disposed inside the capture layer, the culture layer comprising a culture unit supporting the virus to maintain activity and replicate in the presence of a host, a host bacterium sensitive to the virus, and a visual indicator indicating viral replication or host response; and a base layer disposed inside the culture layer; the sampling patch is fixed to the face mask through the base layer, and viral aerosol collection is achieved without external power through the capture layer, and countable detection results are generated after sampling through the culture layer; utilizing the airflow and humidity conditions naturally formed during wearing, effective interception, activity preservation, and visual detection of viral aerosols are achieved without complex equipment and additional operating steps, and the operation is simple and repeatable.

A traceable calibration device of particle number (PN) analyzers for vehicle emission includes a particle generation system, used for generating different types of aerosol samples; a solenoid valve system, used for controlling various aerosol samples to quantitatively enter the particle growth system; a particle growth system, used for performing charge classification to obtain doubly-charged-particle aerosol samples, triply-charged-particle aerosol samples and monodisperse aerosol samples, and obtaining grown particle samples by controlling the growth speed of the monodisperse aerosol samples through temperature adjustment; and a particle measurement system, used for measuring electrical current and PN concentration of the grown particle samples. In the present disclosure, the problem of low calibration accuracy of a PN analyzer for vehicle emission in the related art is solved.

A system for the detection of airborne viruses is disclosed. The system comprises at least one local detector, the local detector comprising an aerosol collection module arranged to gather the particulate matter from the aerosol sample onto a collection chip, an analysis module arranged for detecting the amount of the viruses that are part of the particulate matter contained in the collected aerosol sample, and an output module arranged to emit a warning signal when the total viral content surpasses a predetermined threshold.

This invention relates to a high-efficiency aerosol sampling device and method, belonging to the fields of environmental monitoring and biosafety technology. It includes a U-shaped ventilation tube with a flat bottom, an air inlet at the top of the left longitudinal tube, and an air outlet at the top of the right longitudinal tube. A fan is installed at the air inlet to achieve high-flow-rate air introduction. The inner side of the flat section of the U-shaped ventilation tube is filled with sampling liquid, and a temperature control component is installed on the outer side of the flat section. This invention provides a device and method that can significantly increase the contact area through an evaporation-condensation cycle without reducing airflow, achieving high-throughput and high-efficiency microbial aerosol sampling. It solves the problems of low airflow, limited contact area between aerosol and sampling liquid, and insufficient sampling efficiency in existing aerosol sampling technologies.

The application discloses an air bacterial electrostatic collection and real-time monitoring system and method integrated with a microfluidic portable sensor, and belongs to the technical field of environmental monitoring, and comprises an aerosol sampling module, a microfluidic processing module, an electrochemical sensing module and a portable constant potential instrument module. Bacteria aerosols in the ambient air are charged by corona discharge to realize efficient enrichment and collection; the enriched liquid sample is sent into the microfluidic processing module and flows through a sensing electrode modified with CuFeCoPBA@MoS2 nano composite material, polydopamine and concanavalin A. Target bacteria are combined with the concanavalin A on the surface of the electrode in a broad-spectrum specific manner, the interface electron transfer is hindered, the portable constant potential instrument collects the attenuation change of differential pulse voltammetry electrochemical signals, and rapid quantitative detection of the concentration of air bacteria is completed. The application integrates efficient air aerosol collection and portable biosensing, and can realize one-step on-site capture and detection of air pathogens.

This invention discloses a method and apparatus for detecting atmospheric aerosols based on quantum weak measurement, belonging to the field of atmospheric aerosol detection. The method includes the following steps: S1, preparing aerosol solutions of various concentrations and dissolving them to obtain uniformly dispersed aerosol sample solutions of various concentrations; S2, detecting the intensity difference between left-handed and right-handed circularly polarized light of the aerosol sample solutions of various concentrations; S3, calculating the optical rotation spectrum corresponding to the aerosol sample solutions of various concentrations based on the intensity difference between left-handed and right-handed circularly polarized light, combined with a quantum weak measurement theoretical model, to determine the type and concentration of aerosols through the characteristic differences in the optical rotation spectrum. By employing the above-mentioned method and apparatus for detecting atmospheric aerosols based on quantum weak measurement, and utilizing the signal amplification mechanism of quantum weak measurement, combined with the correlation between optical rotation spectrum and concentration, highly sensitive type identification and quantitative concentration detection of atmospheric VOC aerosols can be achieved.

The application provides an aerosol sampling device, a full-time sampling method and a multi-point sampling method. The device comprises a machine body and sampling channels arranged along the circumference of the machine body. Each sampling channel comprises a cyclone chamber, a sampling cup and a fan. A plurality of air exhaust branches are arranged in the machine body and separated from each other. The sampling cup is in communication with the corresponding cyclone chamber, and the fan is in communication with the corresponding cyclone chamber. The air inlet end of each air exhaust branch is in communication with the corresponding fan. The plurality of air exhaust branches correspond to the plurality of sampling channels one by one, so that the sampling airflow of each sampling channel is discharged through the corresponding air exhaust branch. The plurality of sampling cups correspond to the plurality of sampling channels one by one to store the samples collected by each sampling channel respectively. A control member is arranged on the machine body and electrically connected with each fan to control the independent start and stop of each sampling channel. The above structure improves the cleanliness of the samples.

This application discloses an intelligent detection system for aerosol pathogens based on real-time air quality monitoring, relating to the fields of bioaerosols and air quality monitoring. The system includes: a mobile unit that patrols along a preset route; an air quality monitoring unit that collects air quality data from each sampling point; an aerosol collection unit that collects aerosol samples when air quality data exceeds a threshold; a nucleic acid detection unit that uses a detection kit to detect the aerosol samples; and an intelligent control unit that, when air quality data exceeds the corresponding threshold, activates the aerosol collection unit to continue patrolling along the preset route; activates the nucleic acid detection unit to perform pooled testing of samples; if the pooled test result exceeds the pathogen threshold, the system revisits each contaminated area to collect aerosol samples and activates the nucleic acid detection unit to perform individual sample testing; if the individual test result exceeds the pathogen threshold, the system uploads the data to the terminal for early warning. This application enhances the accuracy and timeliness of target pathogen detection.

The application provides a biological aerosol pollution source tracing method and device, electronic equipment and storage medium, and relates to the technical field of environmental monitoring and artificial intelligence, and the method comprises the following steps: acquiring biological aerosol data of a target pollution source field, and determining a heterogeneous feature fingerprint item according to the biological aerosol data; inputting a structured numerical fingerprint and an unstructured text description into a biological aerosol special embedding model to obtain a target index; acquiring analysis data of an unknown biological aerosol sample collected in a target area, and performing double-channel mixed retrieval according to the analysis data and the target index to determine a potential pollution source set; performing tracing retrieval on the potential pollution source set to obtain a pollution source enhancement prompt; inputting the pollution source enhancement prompt into a large language model to obtain a pollution source tracing analysis report corresponding to the unknown biological aerosol sample output by the large language model. The technical scheme of the application improves the accuracy of biological aerosol pollution source tracing.

The application relates to the technical field of performance evaluation of a biological aerosol sampler, and provides a biological aerosol sampler performance evaluation method, which comprises the following steps: environment construction: adjusting and maintaining the temperature, humidity, air pressure and air cleanliness in a calibration cabin to a preset target range; aerosol generation and homogenization: generating standard aerosols containing a target tracer in the calibration cabin, and mixing the air in the cabin to form a test aerosol environment with uniform spatial concentration distribution in a sampling area; dynamic sampling: making the detected sampler and a comparative sampler sample at multiple different spatial points in the calibration cabin; data comparison and analysis: performing performance calibration on the detected sampler according to the sampling data of the detected sampler and the comparative sampler. The environment conditions highly close to actual application scenarios are constructed, and the comprehensive performance of the biological aerosol sampler can be scientifically, systematically and quantitatively evaluated and calibrated.

This invention discloses a remotely controllable inertial-electrostatic field multi-mode bioaerosol sampling system. The system includes an inertial bioaerosol sampler, an electrostatic field bioaerosol sampler, and a remote controller. The inertial sampler captures aerosol particles using the principle of inertial impaction and is equipped with sampling heads with different flow rates of 1000 / 1300 / 1500 L / min. The electrostatic field sampler employs the principles of corona discharge and electrostatic adsorption, with a uniquely designed air duct that creates a descending and then ascending inlet airflow and a uniformly flowing outlet airflow. When used together, the two systems achieve a capture efficiency of ≥98% for particles larger than 1µm, with a wide particle size sampling range of 0.01-100 µm. The remote controller wirelessly controls the two samplers at a distance of ≥100 m, enabling synchronous or time-sharing multi-mode sampling of aerosols with a wide particle size range. The advantage of this invention is that it balances high efficiency and high flow rate sampling of aerosols with a wide particle size range while reducing biosafety risks to personnel.

The film covering feeding device relates to the technical field of aerosol sampling feeding devices, and comprises a film feeding frame, a film feeding power component and a film feeding support assembly. The film feeding frame is provided with a film containing area. The film feeding power component is vertically arranged and installed on the film feeding frame. The film feeding power component is located outside the film containing area. The driving end of the film feeding power component is connected with the film feeding support assembly. The film feeding support assembly is located below the film containing area and is matched with the film containing area. The film feeding power component drives the film feeding support assembly to move vertically and reciprocally in the film containing area. The film covering feeding device can contain and automatically lift the film covering, realize automatic feeding of the film covering, improve work efficiency and reduce labor cost.

This invention relates to a vertical in-situ measurement device and method for aerosol liquid water content. An airborne module on a UAV carries an onboard online measurement module and an onboard aerosol sampling module to different altitudes. The onboard online measurement module measures the relative humidity and aerosol particle size distribution at different altitudes. The onboard aerosol sampling module collects aerosol particles at different altitudes and maintains their aerosol state before bringing them back to the ground. The ground-based online measurement module measures the hygroscopicity of the aerosol samples to obtain the aerosol hygroscopic growth factor at different relative humidities. The aerosol liquid water content at different altitudes is calculated using the relative humidity, aerosol particle size distribution, and hygroscopic growth factor. This invention enables low-cost, high spatiotemporal resolution observation of the all-day vertical profile of aerosol liquid water content below 1 km, belonging to the field of atmospheric environmental monitoring technology.

Aerosol sampling device (1) comprising: - a conduit (3), - several collectors (5) in fluidic communication with the conduit, each collector extending along a collecting direction (A) and comprising a nozzle (7), a tube (9), a filter (10) configured to capture aerosols, a neck (12) configured to allow critical fluid flow in the collector, each tube having an inlet and an outlet and being straight between the inlet and outlet, and - a vacuum pump (14) fluidically connected to the collectors via the conduit. Figure to be published for the abstract: Figure 4

This invention proposes a multi-stage impactor aerosol sampler and continuous monitoring system, belonging to the field of radioactive environment monitoring. It addresses the problem of extremely high exposure risks during filter replacement when traditional impactor samplers are applied to high-intensity radioactive environments. It includes a cylindrical sealed tower body containing multiple longitudinally connected aerodynamic separation units. Each separation unit has a radial opening on the tower wall, with the radial openings arranged spirally and staggered along the circumference of the tower body. A drawer-type sampling box includes a shielded drawer box, which can be radially inserted and removed into the radial openings. A bypass channel and sliding valve linkage mechanism, located inside the tower body, includes a bypass branch connected in parallel with the main gas channel, and a sliding valve located at the intersection of the main gas channel and the bypass branch. It is primarily used in the uranium mining field.

The application discloses a method for chemical ionization mass spectrum analysis of offline organic aerosol samples, aiming at realizing fast and accurate measurement of polar atmospheric organic aerosol samples. The method firstly processes offline atmospheric particulate matter samples, intercepts 2-7mm-sized samples, and clamps the samples between two clean filter membranes to fix the samples; then, the samples are heated by using a nonlinear temperature program, and data are collected after heating; the thermal background signal is deducted by using a thermal background multiplication method or a thermal background inference method to ensure the accuracy of the data; finally, the mass spectrum signals of various organic components of the samples at different temperatures are analyzed by chemical ionization mass spectrum after desorption by hot nitrogen blowing, so that the molecular composition information and thermal analysis curves of the compounds in the sample aerosol are obtained. The method is simple in operation, can effectively analyze the chemical components of polar organic aerosols, is suitable for offline sample analysis of atmospheric aerosols, and has high popularization and application value.

The application provides a spectrum absorption analysis method of carbon aerosol, an electronic device and a storage medium, and relates to the technical field of atmospheric detection. The method comprises the following steps: determining a target tracer in a plurality of emissions corresponding to a main emission source type of a carbon aerosol sample set; measuring and acquiring, by a thermal optical carbon analyzer, a carbon aerosol absorption coefficient of each carbon aerosol sample at a preset wavelength, and fitting and determining an initial absorption coefficient of brown carbon of each carbon aerosol sample at the preset wavelength according to the carbon aerosol absorption coefficient, an absorption wavelength index fluctuation range of black carbon, a preset adjustment step and an absorption wavelength index constraint condition of brown carbon; and iteratively determining target absorption wavelength indexes of brown carbon and black carbon in a preset wavelength range according to the initial absorption coefficient and the concentration of the target tracer in each carbon aerosol sample, so that the accuracy of carbon aerosol analysis can be improved, and the influence of dust on the carbon aerosol absorption coefficient can be excluded.

The utility model discloses a kind of radiation environment monitoring aerosol sampling devices, including air inlet pipe, lifting mechanism, shunt pipe, fixing frame, sampling mechanism, air outlet pipe, box;Air inlet pipe is set to device whole just above, air inlet pipe is simultaneously connected with lifting mechanism, air inlet pipe lower part is equipped with shunt pipe, shunt pipe lower part connects sampling mechanism, sampling mechanism lower part connects air outlet pipe, first, device whole is erected around nuclear power plant or nuclear facility, by air inlet pipe, external gas enters device, according to the data of wind direction sensor, adjust air inlet pipe swing angle, by lifting mechanism control air inlet pipe height, increase air inlet efficiency, by sampling mechanism, gas condition is monitored in real time and carries out aerosol sampling, cooperate with the comprehensive data of wind speed sensor, realize the monitoring of aerosol in radiation environment gas, by the access hole of box outer wall, realize to replace maintenance to the damaged component inside device, and the replacement maintenance of sampling tube and aerosol filter membrane.