130 results about "Aerosol sampling" patented technology

The invention relates to the technical field of atmospheric biological aerosol sampling and detection, in particular to a particle size resolution type aerosol in-situ sampling and analysis integrated system and method. The system comprises an electrostatic field grading aerosol sampler, a micro-fluidic detection chip based on an immunochromatography principle and an image acquisition and data analysis unit, according to the electrostatic field grading aerosol sampler, biological aerosol particles are electrified through a charge tube, and grading capture according to particle sizes is realized in a stepped electrostatic field; the micro-fluidic detection chip transfers an enriched sample to a multi-layer structure micro-fluidic chip, and a specific reaction is completed based on an immunochromatography principle; and the image acquisition and data analysis unit captures a color developing image through a high-definition camera, and adopts an RGB analysis algorithm to realize quantitative detection. The method realizes full-process automation from sampling to analysis, solves the problems of low efficiency and tedious operation of a traditional method, and has the advantages of high detection speed, high sensitivity, no need of harmful reagents, environmental friendliness and the like.

The invention relates to an aerosol multi-parameter dynamic monitoring system and a mass transfer source item correction method based on experiment-simulation fusion, and the aerosol multi-parameter dynamic monitoring system comprises a condensation nucleus control device, a flue gas simulation device and a multi-measuring-point filler type absorption tower, the condensation nucleus control device is used for generating monodisperse aerosol condensation nucleuses with single particle size; the flue gas simulation device is used for generating simulation flue gas with controllable components and flow based on the monodisperse aerosol condensation nucleus; the multi-measuring-point packing type absorption tower is provided with at least three aerosol sampling measuring points at intervals along the height direction of the tower body; the particle information acquisition system comprises a constant-speed sampling gun and an ELPI measuring instrument. Compared with the prior art, the method has the advantages that the mass transfer coefficient of the secondary aerosol can be accurately obtained, and the dynamic correction of the source item in numerical simulation is realized, so that the simulation precision and engineering adaptability of the carbon capture system in the aspects of absorbent loss and aerosol escape control are improved.

The invention provides an atmospheric particulate water-soluble ion analysis instrument calibration system and calibration method, and belongs to the technical field of atmospheric particulate measurement. The system comprises an atmospheric environment simulation measurement device and a portable calibration device. The atmospheric environment simulation measurement device simulates actual environmental conditions through an aerosol mixing cabin in a thermotank, and is equipped with various sensors to monitor temperature, air pressure and humidity. The portable calibration device is internally provided with an aerosol generator, a constant-speed diverter, a particle sensor and the like, and an aerosol sample can be generated on site for calibration. The calibration method comprises two parts of constructing a standard parameter database and performing field calibration, and the calibration precision is ensured by comparing a measured value of the particulate matter sensor with a particle size spectrum. According to the calibration system and the calibration method for the atmospheric particulate water-soluble ion analysis instrument, the problems that traditional calibration equipment is large in size and cannot be calibrated on site are solved, and reliable technical support is provided for on-site calibration of the atmospheric particulate water-soluble ion analysis instrument.

The invention discloses a multifunctional aerosol test system. Comprising a rotary drum reaction chamber; the aerosol generation subsystem is used for inputting aerosol to the test subsystem; the airflow regulation and control subsystem comprises an inlet side regulation and control module and an outlet side regulation and control module; the test substance release subsystem comprises disinfection liquid release equipment, volatile organic compound generation equipment and oxidant release equipment and is used for inputting a test substance to the test subsystem, and the test substance comprises one or more of disinfection liquid, a volatile organic compound and an oxidant; the detecting and monitoring subsystem is used for detecting and monitoring changes in the testing subsystem in real time and comprises an online measuring instrument, an aerosol sampling instrument and a particle size testing device. The test system disclosed by the invention can be used for realizing various aerosol tests such as indoor pathogen killing tests of buildings, indoor secondary organic aerosol synthesis tests and the like.

The present invention discloses an atmospheric aerosol classification sampler, which relates to the technical field of atmospheric aerosol sampling. It includes a base, a protective bracket, a slide table cylinder, a collection component, and a classification component. Among them, a driving wheel is fixed at each of the four corner positions on the lower end surface of the base for driving the device to move. A control panel is fixed on one side of the base for controlling the start and stop of the device. A protective bracket is fixed on the upper end surface of the base, and a classification component is fixed inside the protective bracket. An air inlet is fixed on the upper end surface of the classification component, and the air inlet extends out of the protective bracket. Collection components are arranged on the left and right sides of the classification component, and at least two slide table cylinders are symmetrically arranged on the front and back sides of the classification component for accelerating the precipitation speed of atmospheric aerosols. Through the cooperation of the classification component and the slide table cylinder, the present invention can accelerate the precipitation speed of atmospheric aerosols, quickly classify them, and separately recover the classified aerosols through the collection component, improving the sampling efficiency and classification accuracy.

The utility model relates to a mineral aerosol sampling device for a concealed rare earth mine deep coverage area. The mineral aerosol sampling device comprises a bracket, a retracting and releasing mechanism, a low background gas collecting pipe and a sampling mechanism, the sampling mechanism is connected to the underground moving end of the low background gas collecting pipe, the overground part of the low background gas collecting pipe is connected with the receiving and releasing mechanism, and the receiving and releasing mechanism is arranged on the support and is configured to control the sampling mechanism to be located at different underground depth positions so as to achieve continuous sampling of mine texture aerosol at the different underground depth positions; wherein the sampling mechanism comprises an automatic depth-keeping sealing valve, a cutting head and a filter membrane assembly which are arranged from bottom to top, and the filter membrane assembly is fixedly connected and communicated with the underground moving end of the low background gas collecting pipe. According to the device and the method, continuous sampling of ore texture aerosol at different underground depth positions in a bastnaesite type rare earth ore deep coverage area is realized.

The utility model discloses a grading sampling device for aerosol, which mainly solves the technical problems that the anti-seismic property of the existing sampling equipment is poorer in an impact high-temperature and high-pressure field, and parts in the equipment are extremely easy to be damaged by shock. The sampling device comprises a box body, and a sampling unit, a fixing plate and a damping unit which are arranged in the box body, the sampling unit comprises a grading filter and an air extractor which are respectively arranged on the fixed plate; an air inlet nozzle is arranged at the top of the grading filter, a through hole is formed in a box cover of the box body, and the air inlet nozzle extends out of the through hole from inside to outside and is used for collecting an aerosol sample; an air outlet nozzle is arranged at the bottom of the grading filter and is connected with an air extractor; the fixed plate is mounted on the bottom plate of the box body through a plurality of connecting columns and fasteners; the damping unit comprises a buffer pad and a plurality of damping pads; and the shock pad and the buffer pad can achieve buffering between the connecting column and the fixing plate, and parts in the device are effectively prevented from being damaged.

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.

The present invention discloses a particle separation device, gas particle concentration detection equipment, and an aerosol sampling device. The particle separation device includes a first separator, wherein a first air inlet of the first separator is connected to a first accommodating chamber, and a first deflection portion is located between the first air inlet and the first accommodating chamber; a first airflow generating device is configured to generate a first airflow and connect to the first accommodating chamber, allowing a first target gas (including first and second particles) to enter the first accommodating chamber through the first air inlet, with the first particles being larger than the second particles; and a second airflow generating device is configured to generate a second airflow and connect to the first deflection portion through the second accommodating chamber, thereby drawing the second particles entering the first accommodating chamber into the second accommodating chamber while preventing the first particles from being drawn into the second accommodating chamber. This invention avoids the particle breakage and rebound problems that may occur in traditional impactors.

The utility model relates to an unmanned aerial vehicle airborne biological aerosol sampler, and relates to the technical field of aerosol sampling devices, the unmanned aerial vehicle airborne biological aerosol sampler comprises an air inlet valve seat, an air inlet channel is arranged in the air inlet valve seat, the air inlet end of the air inlet channel is connected with an air inlet valve, the air inlet valve is used for controlling communication of the air inlet channel, and the air outlet end is connected with a fan; the air inlet valve is configured to be automatically opened when the fan works; the fan fixing seat is arranged between the air inlet valve seat and the fan, is used for bearing the fan and is detachably connected with the air inlet valve seat; the filter membrane is arranged on the side, away from the draught fan, of the draught fan fixing base and located in the air inlet channel. The sampler capable of controlling the opening and closing of the air inlet valve through the fan is arranged, so that the contact and separation control of the filter membrane and the external environment is realized, the pollution of the filter membrane after the sampling is finished is avoided, the influence on the filter membrane when the shell is disinfected is also avoided, and the collection efficiency and the collection effect of the sampler are effectively ensured.

Improved respirator fit test devices including piezoelectric pumps that reduce noise and vibration of the device. The devices may include two or more piezoelectric pumps, wherein a first pump moves sheath air through a differential mobility analyzer and a second pump alternately moves aerosol from inside or outside a respirator through the differential mobility analyzer. A size selected portion of each aerosol sample is then moved through a condensation nuclei counter. Control circuitry enables user selection of a respirator type to be tested, wherein the differential mobility analyzer may be enabled or disabled based on the user selection. The control circuitry further enables calculation of a fit factor corresponding to a quantitative effectiveness of the respirator fitting a user based on signals from the condensation nuclei counter for each aerosol sample.

The embodiment of the present application discloses a kind of method and device for measuring artificial alpha aerosol concentration, the contribution factor of natural alpha to artificial alpha energy region is determined by calibrating calibration sampling filter paper in the environment to be measured without containing artificial alpha aerosol, then real-time detection is carried out to test sample filter paper containing alpha aerosol sample in the environment to be measured, and the real count of artificial alpha energy region is determined by the total alpha count collected and the natural alpha count corresponding to each of the multiple natural alpha energy region intervals previously calibrated, in combination with the contribution factor of natural alpha to artificial alpha energy region in the multiple natural alpha energy region intervals previously calibrated.The method and system fully reflect the influence of radon and thorium daughter on measurement when measuring artificial alpha aerosol concentration, and deduct the count of natural alpha radioactivity signal in the collected radioactivity signal, thereby greatly improving the precision and accuracy of artificial alpha aerosol concentration measurement.

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.

The invention relates to the technical field of aerosol measurement, in particular to an aerosol sampling and measuring system suitable for a steam flowing system and a control method thereof, and the aerosol sampling and measuring system comprises a primary sampling structure, a secondary sampling structure, a gas filling structure, a full development structure, a discharge structure, a measurement and control host and an aerosol measuring host; the sampling end of the first-stage sampling structure is arranged in a target measurement environment, the gas filling structure is arranged at the downstream of the first-stage sampling structure, a heating sleeve is arranged on the outer side of the gas filling structure, the peripheral wall of the gas filling structure is communicated with an exhaust pipe and a gas injection pipe, and convection is formed between a gas inlet, communicated with the first-stage sampling structure, of the gas filling structure and a gas outlet of the gas injection pipe; the full development structure is arranged at the downstream of the gas filling structure, and the sampling end of the secondary sampling structure is arranged in the full development structure; the discharge structure is disposed downstream of the adequate development structure. According to the invention, a steam condensation phenomenon in a gas mixing process can be effectively avoided, and aerosol constant-speed sampling in a high gas flow rate change range is realized.

The application provides an atmospheric particulate matter water-soluble ion analysis instrument calibration system and a calibration method, and belongs to the technical field of atmospheric particulate matter metrology. The system comprises an atmospheric environment simulation measurement device and a portable calibration device. The atmospheric environment simulation measurement device simulates actual environmental conditions through an aerosol mixing cabin in a thermostat, and is equipped with various sensors to monitor temperature, air pressure and humidity. The portable calibration device is internally provided with an aerosol generator, an equal-speed flow divider, a particulate sensor and the like, and can generate aerosol samples on site for calibration. The calibration method comprises two parts of constructing a standard parameter database and on-site calibration, and ensures calibration accuracy by comparing particulate matter sensor measurement values and particle size spectra. The application adopts the atmospheric particulate matter water-soluble ion analysis instrument calibration system and the calibration method, solves the problem that traditional calibration equipment is large in size and cannot be calibrated on site, and provides reliable technical support for on-site calibration of atmospheric particulate matter water-soluble ion analysis instruments.

The application provides an air aerosol sampling and detecting integrated robot, which comprises a robot body, an aerosol sampling module, a motion module, a sample detecting module and a control module are arranged on the robot body; the aerosol sampling module comprises an air inlet pipe, an air outlet pipe, a sampling cup and a fan, the air inlet pipe is communicated with the sampling cup, the air inlet pipe is communicated with the air inlet of the fan, and the air outlet pipe is communicated with the air outlet of the fan; the motion module comprises a power wheel for providing power and a steering wheel for steering; the sample detecting module comprises a material storage device, a driving pump and a detecting device, the material storage device is connected with the driving pump through a pipeline, and the driving pump is connected with the detecting device through a pipeline; and the control module comprises a central control system. The robot can be flexibly moved to a specific area for sampling, the sampling range is wide, the sampling spectrum coverage is high, the sample can be detected through the sample detecting module, and the aerosol sampling and detecting integration is realized.

The present application belongs to the technical field of aerosol measurement, and particularly relates to a method and system for measuring the surface tension of cloud droplets in the process of aerosol activation into clouds. The method comprises: building a system for measuring the surface tension of cloud droplets, including a cloud condensation nucleus counter, electrode plates, a high-voltage power supply, a condensation nucleus particle counter, and a differential mobility analyzer; applying a high-voltage electric field to cause positive and negative ions in the droplets to split under the traction of the electric field; aerosol samples are converted into droplets by absorbing water vapor in a cloud chamber, and the droplets split under the traction of the high-voltage electric field; the number concentration of the droplets in the outflow sample is measured by the condensation nucleus particle counter; the critical voltage at which the droplets split is obtained by fitting the graph of the number concentration of the droplets versus the voltage intensity; and the surface tension of the droplets is calculated according to the quantitative relationship between the critical voltage and the surface tension of the droplets. The present application can be used in atmospheric chemical transport simulation and climate models to evaluate the influence of the surface tension of cloud droplets on the number concentration and particle size of the cloud droplets.

This invention discloses an aerosol collection device based on electrostatic enrichment, belonging to the field of radiation measurement equipment technology. Based on the easily ionized characteristic of radiation-carrying aerosol particles, multiple sets of electrostatic generators are used to adsorb aerosol particles in the environment, greatly increasing the aerosol density at the sampling port. A low-power fan is then sufficient for aerosol sampling. Because the electrostatic adsorption device gathers aerosol particles in the environment, the sampling flow rate requirement is greatly reduced, thereby reducing reliance on high-power fans or air pumps and significantly reducing equipment power consumption. Furthermore, the two processes within the device operate independently and do not interfere with each other, thus not affecting the aerosol collection efficiency. By redesigning the aerosol collection process and dividing it into two independent processes, the dependence on high-power fans for collection is eliminated.

The invention provides a platform for testing the temperature response characteristic of a biological aerosol sensor, and relates to the technical field of environment monitoring equipment and sensor testing, and the platform comprises an environment control cabin which is used for simulating and maintaining a wide temperature and humidity condition; the to-be-tested biological aerosol sensor interface is arranged in the environment control cabin and is used for accommodating a to-be-tested biological aerosol sensor and carrying out physical and data interface with the to-be-tested biological aerosol sensor; the aerosol generation and transmission system is used for generating and stably conveying standard particles and / or biological aerosol samples with known particle sizes; and the data acquisition and control module is used for synchronously acquiring data of the environment sensor and original data such as particle size, scattered light and multispectral fluorescence output by the bioaerosol sensor to be tested, and realizing automatic control and data storage and analysis in the testing process. According to the method, a reliable data basis can be provided for performance evaluation, temperature response mechanism analysis and adaptive compensation model development of the biological aerosol sensor under different temperature and humidity conditions.

The application relates to the technical field of radiation detection, in particular to a gas chamber suitable for an airborne aerosol sampling and analyzing device, which comprises a gas chamber for inhaling air and an alpha-beta detector in communication with the gas chamber; the alpha-beta detector is used for online analysis of radioactive aerosols; a sampling sheet for collecting a radioactive aerosol sample is arranged in the gas chamber; the gas chamber suitable for the airborne aerosol sampling and analyzing device further comprises a replacement mechanism for fixing the sampling sheet and capable of replacing the sampling sheet. The application designs a gas chamber, integrates the detector, filter paper, air path and replacement mechanism for replacing the filter paper in a small volume structure, has high integration degree, small volume, light weight, easy replacement of the filter paper, is suitable for various detection devices such as fixed type and mobile type, and is especially suitable for airborne detection devices.

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 discloses a vapor-containing enclosed space aerosol sampling and measurement device, comprising: an aerosol sampling tube extending into the enclosed space; a measurement unit connected to the aerosol sampling tube via pipelines; a particle size analyzer connected to the measurement unit; a calibration particle container located at the inlet of the measurement unit; a condensate washing tank, a drying tube, and a flow controller sequentially connected to the measurement unit via pipelines; and an injection and purging pipeline connected to the aerosol sampling tube. Compared to the prior art, in this invention's vapor-containing enclosed space aerosol sampling and measurement device, a three-stage condensate washing tank, a drying tube, and a flow controller are connected downstream of the measuring instrument. This allows for the condensation of vapor in the sampled gas and the filtration of solid dust, ensuring that the air entering the flow controller is low-temperature, dry, and pure. This enables effective control of the sampled gas flow rate, ensuring the accuracy of aerosol concentration and particle size distribution measurements in the vapor-containing mixed sampled gas.

The invention discloses a polonium aerosol online monitoring system and method, and relates to the technical field of polonium monitoring. The system specifically comprises an aerosol sampling and enriching subsystem, an SERS detection subsystem and a data analysis and alarm subsystem, the aerosol sampling and enriching subsystem comprises an SERS substrate filter membrane, the SERS substrate filter membrane captures aerosol of gas to be detected, and a sample to be detected is formed on the SERS substrate filter membrane; the SERS detection subsystem irradiates a to-be-detected sample of the SERS substrate filter membrane and generates a Raman spectrum signal; and the data analysis and alarm subsystem receives the Raman spectrum signal from the SERS detection subsystem, and obtains the concentration of the polonium aerosol according to the polonium compound characteristic peak of the Raman spectrum signal and the correlation reference. The method is different from a traditional radioactivity detection method of polonium, complex sample pretreatment steps such as source preparation and extraction are not needed, and the time consumed by polonium aerosol in the measurement process is shortened.

The invention relates to the technical field of mass spectrum detection, in particular to a biological aerosol detecting, sampling and detecting integrated device and a control system, comprising a reconnaissance module for sequentially performing fluorescence characteristic detection and mass spectrum component analysis on single-particle aerosol and generating a judgment signal, and a sampling module which is in signal connection with the reconnaissance module and is used for sampling the single-particle aerosol. The sampling module is used for collecting an aerosol sample in an environment based on the judgment signal, the immunodetection module is in fluid connection with the sampling module and is used for carrying out immunoassay on the sample collected by the sampling module, and the reconnaissance module, the sampling module and the immunodetection module are sequentially connected. And the sampling module controls start and stop based on the judgment signal output by the reconnaissance module. Misjudgment possibly caused by a single detection method is effectively avoided, and more accurate decision support is provided for biological safety guarantee.

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 invention provides a biological aerosol concentration, cracking and sample introduction device and method, the biological aerosol concentration, cracking and sample introduction device comprises an aerosol concentration separator, an aerosol sample introduction transmission line and a thermal cracker, the thermal cracker is provided with a cracking tube, the middle of the cracking tube is provided with a cracking zone, and quartz wool is arranged in the cracking zone; the aerosol concentration separator is used for concentrating and enriching aerosol in air, the aerosol sampling transmission line is used for guiding the aerosol concentrated and enriched by the aerosol concentration separator into an inlet of a cracking tube of the thermal cracker, and the concentrated and enriched aerosol is intercepted by quartz wool in a cracking area; the thermal cracker can generate high temperature and conduct the high temperature to the cracking zone, and biological macromolecules in the concentrated and enriched aerosol in the cracking zone are cracked into small molecule fragments. According to the technical scheme, the aerosol mass spectrum monitoring equipment is low in cost, small in size, convenient to move, good in real-time performance and very suitable for on-site deployment.

The present invention provides an air bioaerosol sampling device and a sampling method thereof in the field of bioaerosol sampling technology, comprising a polymerization reflux channel, a flow meter, a temperature control cylinder, a vacuum pump, a thermometer, an air inlet, a vaporized liquid storage bottle, a ceramic vaporization core, a condensation growth channel, a sampling bottle, a reflux liquid guide plate, a ceramic atomizing plate, an atomized liquid storage bottle, a reflux liquid collection tank, and a reflux liquid outlet. The present invention provides a ceramic vaporization core and a condensation growth channel. The ceramic vaporization core heats glycerol in the vaporized liquid storage bottle to generate hydrophilic molecules. The hydrophilic molecules entering the condensation growth channel and water vapor in the air continuously condense on the surface of the bioaerosol, causing its volume to continuously increase to form droplets. The condensation action and polymerization with the atomized droplets can cause the volume of the bioaerosol in the environmental sample to gradually increase in the sampler, effectively preventing the escape of tiny aerosols and achieving the maximum capture of bioaerosols of different particle sizes in the air.

The present application relates to aerosol measurement technical field, specifically to a kind of aerosol sampling measurement system and control method suitable for steam flow system, including primary and secondary sampling structure, gas filling structure, fully developed structure, discharge structure, control host computer and aerosol measurement host computer;Sampling end of primary sampling structure is arranged in target measurement environment, gas filling structure is arranged downstream of primary sampling structure, its outer side is provided with heating jacket and its outer wall is communicated with exhaust pipe and gas injection pipe, gas filling structure is communicated to the gas inlet of primary sampling structure and the gas outlet between gas injection pipe, and convection is formed;Fully developed structure is arranged downstream of gas filling structure, and sampling end of secondary sampling structure is arranged in fully developed structure;Discharge structure is arranged downstream of fully developed structure.The present application can effectively avoid steam condensation phenomenon in gas mixing process, and realize aerosol equal-speed sampling under high gas flow rate change range.

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.