82 results about "Air sample" patented technology

The invention relates to the technical field of environment monitoring, and discloses a real-time detection method and system for concentration and components of air particulate matters. According to the method, signal fragments are intercepted from continuous detection flow of an air sample in a segmented mode to serve as analysis elements, a de-noising characteristic signal set is generated through background field stripping, and background field parameters are recorded. And positioning a high-concentration characteristic peak cluster in the de-noised signal to mark a key detection window, and constructing a corresponding dynamic detection task sequence. And calling a special analysis thread to carry out collaborative analysis on the de-noised characteristic signal set to obtain a hierarchical judgment result. And the result is coupled and compared with background field parameters, and if conflicts exist, the dynamic detection task sequence is recombined in real time. And updating and executing a control strategy for a subsequent detection flow according to the recombined sequence, thereby forming a self-adaptive closed-loop detection process. According to the invention, the accuracy, depth and adaptive capacity of real-time analysis of pollution components in a complex environment are improved.

The present application relates to the detection method of peroxynitrate in the atmosphere, comprising: the six-way valve is adjusted to the sampling mode, the carrier gas and air inlet are opened, the carrier gas is swept to the chromatographic column and the electron capture detector in turn after passing through the first passage of the six-way valve, and the negative pressure device on the downstream side of the electron capture detector is opened at the same time; the air enters the sampling ring through the second passage of the six-way valve, and the excess air is discharged by using the air pump; the six-way valve is adjusted to the detection mode, the carrier gas enters the sampling ring through the third passage, the air sample in the sampling ring is taken out and brought into the chromatographic column; the PANs in the air sample are separated in the chromatographic column, and then enter the electron capture detector for detection, at the same time, the internal pressure of the electron capture detector is regulated and controlled by the negative pressure device to be stable negative pressure, the peak of the compound to be detected is accelerated, and the sensitivity of the electron capture detector to the detection is improved.

The invention relates to the technical field of environment monitoring, in particular to an air sampling device and method for environment monitoring, the air sampling device comprises a placement table, a lift-off platform and a sampling assembly, a winding motor is fixed in the placement table, one end of a lifting rope is connected with the output end of the winding motor, and the other end of the lifting rope is connected with a sampling mounting table; the helium bag is connected with the sampling mounting table; the sampling assembly comprises a gas inlet pipe, a sampling pump, a gas guide pipe, a sampling container, a sampling shell, a vacuum pump and a connector, the sampling shell is fixed on the sampling mounting table, the sampling container is rotatably arranged in the sampling shell, the gas guide pipe is slidably arranged on the sampling shell and used for being connected with the sampling container, the sampling pump is communicated with the gas guide pipe, and the gas inlet pipe is communicated with the sampling pump; the connector is arranged on the sampling shell in a sliding mode and used for being connected with the sampling container, the vacuum pump is connected with the connector, and air at different heights can be collected more conveniently so that air quality monitoring can be better carried out.

This invention discloses an atmospheric oxidizing indicator detection device, relating to the field of atmospheric detection technology. The proposed solution includes a housing, and further comprises: a condenser tube installed within the housing for dehumidifying incoming air; a splitter, the inlet of which is connected to the outlet of the condenser tube, for splitting the dehumidified air sample into a first branch and a second branch; a photodetector unit, comprising a photoreaction tube, a first mixing tank, and a first detector connected in sequence, the inlet of the photoreaction tube being connected to the outlet of the first branch of the splitter; and a catalytic detection unit, comprising a catalytic reaction tube, a second mixing tank, and a second detector connected in sequence, the inlet of the catalytic reaction tube being connected to the outlet of the second branch of the splitter. This overcomes the inherent time difference problem of sequential measurements using a single detector.

The utility model provides a cell cryopreservation bag. The cell cryopreservation bag comprises a bag body, a sample introduction part and a sampling part, the bag body comprises a plurality of communicated cavities, and a channel is formed between every two adjacent cavities so that the adjacent cavities can be communicated. The sample introduction part comprises a sample introduction port and an air sample introduction pipe connected with the sample introduction port, and the air sample introduction pipe is used for being connected with the external atmosphere so that the air pressure in each cavity can be kept consistent with the external atmospheric pressure. The sampling part is arranged on the bag body and corresponds to the cavity. According to the cell cryopreservation bag, the air sample injection pipe is arranged on the sample injection part, and the channels are formed between the cavities, so that the cavities can be communicated with the outside atmosphere after sample injection is completed, cell suspension samples can be automatically and uniformly subpackaged into the cavities, the subpackaging uniformity of the cell suspension samples is improved, and the subpackaging efficiency of the cell suspension samples is improved. Manual extrusion of an operator is not needed, so that the operation is convenient, the time is shortened, and the cell cryopreservation efficiency is improved.

The invention provides an air purification effect stability quantitative evaluation method and device and a related product, and the method comprises the steps: setting sampling points in three-dimensional grid distribution in a target space to construct a sampling array, controlling the environmental parameters of the target space, and releasing standard pollutants to generate an initial pollution scene; n independent purification tests are executed based on the initial pollution scene, and the purification tests comprise the steps that air purification equipment is controlled to operate, and air samples are synchronously collected at a plurality of preset time nodes through a sampling array to obtain N sets of original pollutant concentration data sets; carrying out standardization processing on the pollutant concentration data set to obtain a pollutant relative concentration data set; and calculating a dispersion statistical value based on the pollutant relative concentration data set to generate a stability quantitative index, and evaluating the air purification effect according to the stability quantitative index. Quantitative, comprehensive and accurate evaluation of the air purification effect on spatial uniformity, time repeatability and overall stability is achieved.

The invention relates to the technical field of air detection, and particularly discloses a method for measuring formaldehyde content in indoor air, which is used for measuring indoor formaldehyde gas by potentiometric titration and comprises the following steps: firstly, preparing a K2Cr2O7 standard solution, a Fe < 2 + > standard solution and a formaldehyde standard solution; secondly, taking a K2Cr2O7 standard solution as an absorption liquid of formaldehyde gas, adding sulfuric acid and distilled water, heating in a water bath, transferring into a gas sampler, and sampling air to obtain a sample collection liquid; and placing the sample collection solution in a water bath kettle, continuously heating, titrating the excess K2Cr2O7 and formaldehyde blank sample by using an automatic potentiometric titrator by using a Fe < 2 + > standard solution as a titrating solution, and calculating the content of formaldehyde in the air. The method disclosed by the invention is simple to operate and accurate in determination, the reaction speed can be increased, the reaction degree can be improved, the lowest detection limit can reach 0.006 mg / m < 3 >, and the method can be used for determining the indoor formaldehyde content. The problems that in the prior art, operation is tedious, the duration time is long, and the detection limit is too high are solved.

The utility model relates to a kind of system of on-line monitoring VOCs and NOx, belong to gas monitoring equipment technical field, including air pump, gas path system, VOCs detection unit, NOx detection unit and workstation, air pump is connected with gas path system, gas path system is connected with the gas path in VOCs detection unit and NOx detection unit respectively, VOCs detection unit and NOx detection unit are electrically connected with workstation;Air pump accesses the gas in environment into gas path system, workstation controls VOCs detection unit and NOx detection unit to monitor the air sample in gas, the system simple structure, small portable, high integration can simultaneously accurately detect VOCs and NOx, reduce detection time and cost, improve efficiency.

The application discloses a kind of ship engine room fire alarm device, it is related to ship fire alarm technical field, including smoke detection equipment and fire alarm mechanism, the fire alarm mechanism includes negative pressure equipment, fine filter, oil mist filter, sampling main pipe, adapter, sampling branch pipe and sampling box;Through the fire alarm mechanism of being set, negative pressure equipment, sampling main pipe, adapter, sampling branch pipe and sampling box are used in cooperation, so that negative pressure equipment is in real time to the inside of ship engine room is extracted gas in all directions, so that the air sample of fire alarm mechanism can forcibly capture each dead angle of engine room, not by the influence of engine room strong ventilation turbulent flow field, effectively solve the problem that low concentration smoke is blown away, dilution at the initial stage of fire, passive probe cannot be reached, realize the rapid capture of smoke, gain sufficient time for fire disposal, avoid fire spread, improve the use effect of fire alarm device, effectively protect ship engine room and personnel.

An air sampling pump is disclosed, including a housing to contain a pump, a battery, and a switch. The switch controls a regulator to control the speed of the pump. A coupler is positioned on an exterior surface of the housing. The coupler releasably connects a hose to the housing, wherein the hose is in fluid communication with the pump to enable the pump to draw air through at least one cassette positioned at an opening at an end of the hose. The cassette collects an air sample to enable the analysis of the air sample for which can be used to measure air contaminants such as asbestos, lead, and mold.

The utility model discloses a fire early warning system, including very early stage smoke detection device, multi sensor integrated device, infrared thermal imaging high definition camera and electric control device, very early stage smoke detection device includes air -suction type smoke detector and air sampling pipe network, air -suction type smoke detector built -in laser scattering detection unit, and through the air pump from air sampling pipe network continuous collection air sample, and air sampling pipe network is annular and is arranged on the top of energy storage container, multi sensor integrated device is installed in the battery pack inside, infrared thermal imaging high definition camera is used for identifying battery module surface temperature gradient anomaly, electric control device respectively with very early stage smoke detection device, multi sensor integrated device, infrared thermal imaging high definition camera electric connection, and with the backstage network connection, is used for according to multi sensor data fusion to establish the hierarchical early warning mechanism and sends to the backstage. The utility model technical scheme can promote the timeliness and accuracy of fire prevention and control.

A breathing air laboratory on location gas sample test and data collecting system and method, at a remote breathing air provider's facility, that includes an air compressor, for remotely testing, collecting, and monitoring the quality and purity of the breathing air being produced at the provider's facility, that allows an accredited independent monitoring, testing, and analyzing facility to provide breathing air validation and certification to a cloud-based air quality test and analysis account belonging to the breathing air provider facility at any time. The system includes redundant gas sample air sensors for O2 and CO to ensure quality and accuracy in the breathing air test and data collection, and analysis and a “canary” gas sample test module securely mounted in a laboratory chassis, but manually swappable, to ensure credibility and accuracy of the sensors being used to test gas / air samples.

Disclosed herein are compositions, devices, and methods for detecting analytes in an air sample taken from a subject. The compositions can comprise on an inanimate surface, such as a face mask worn by an individual, having a test substrate for capturing analytes.

There is provided a leak detection system for detecting breaches in sealed food containers. The leak detection system comprises air-sample testing equipment configured to test the composition of an air sample provided to the air-sample testing equipment. At least one pressing member is provided configured to, in use, apply pressure to the sealed food container located in an air-sampling region. At least one air-sampling port is located in the air-sampling region. An air sample conduit is provided extending between the at least one air-sampling port and the air-sample testing equipment. In use, the at least one air-sampling port takes an air sample from the air-sampling region at least during or after the at least one pressing member applies pressure to the sealed food container in the air-sampling region and communicates said air sample through the air sample conduit to the air-sample testing equipment.

An aspirating detection system for monitoring for the presence of a pathogen, the aspirating detection system including: a network of one or more pipes for sampling air from a plurality of locations monitored by the aspirating detection system; a sensor unit 3 comprising a housing 13 fluidly connected to the network of one or more pipes, and a biosensor 12 mounted within the housing, the biosensor being configured to monitor for the presence of the pathogen; and an aspirator 15 configured to draw airflow through the network of one or more pipes and through the biosensor 12.

The utility model provides a kind of air quality detection equipment for metal smelting environment evaluation, comprising: box;Driving assembly, the driving assembly includes drive motor, the drive motor is suspended in the box inside.The air quality detection equipment for metal smelting environment evaluation provided by the utility model is mutually matched by ventilation pipe, fan, first gas pipe, second gas pipe, shunt component, driving assembly and filter component etc. structure, when using, left and right sides ventilation hood alternate work, cooperate filter screen, both can continuously collect air sample to detect, and when ventilation hood switches working state, utilize airflow to carry out automatic cleaning to filter screen, avoid the problem that filter screen is jammed due to dust accumulation and influence ventilation volume and detection accuracy, improve the detection accuracy of detection equipment;And this automatic cleaning filter screen design reduces the working frequency that staff regularly cleans filter screen, reduces the labor intensity and maintenance cost of staff.

The invention discloses a carbon trapping and sampling system for measuring an atmospheric methane source according to a carbon isotope ratio. The system comprises a gas inlet module, an impurity removal module, a catalytic oxidation module, a methane derived carbon trapping module and a control module. The impurity removal module is connected to the rear end of the gas inlet module, the impurity removal module comprises a solid particulate matter removal assembly, a composite drying assembly, a CO removal assembly and a CO2 adsorption assembly, and the composite drying assembly adopts a replaceable composite drying agent and is provided with a visual window. The CO removal assembly is connected to the rear end of the composite drying assembly, and Hopcalite is adopted as a catalyst. After the catalytic oxidation module is connected to the impurity removal module, a tubular catalytic oxidation furnace is arranged, and a platinum catalyst is used for catalyzing methane oxidation. The system is simple in overall structure and convenient to operate, can be deployed and applied in various scenes, and can capture carbon in atmospheric methane at a sampling point without transporting a large number of air samples so as to measure the carbon isotope ratio.

The invention relates to the technical field of deep underground space environment monitoring, in particular to a deep underground space air microorganism multi-point synchronous sampling method which comprises the following steps: arranging a plurality of sampling points in a deep underground space, and configuring a sampling unit for each sampling point; establishing a multi-channel flow cooperative control system, and dynamically adjusting flow control parameters of each channel by adopting a multi-channel flow cooperative control strategy; establishing a high-precision clock synchronization system, and dynamically adjusting the clock offset according to the network delay jitter condition; all the sampling units simultaneously start air suction sampling in an air pressure balance state through air pressure balance compound control; after sampling is completed, the collected air samples are stored at constant temperature and constant humidity, and sampling data are transmitted to a ground control center. According to the method provided by the invention, efficient acquisition of multi-point microorganism sampling is realized, the problem of microbial community displacement caused by traditional negative pressure sampling is solved, and whole chain increase of'deployment-sampling-maintenance 'is realized.

The invention relates to the technical field of air sampling, in particular to an air microorganism enrichment operation control method and system based on sample analysis. The target microbial biomass after the operation can be accurately predicted through the constructed hybrid neural network model, the influence of the enrichment operation on the equipment state is analyzed according to the operation and the equipment operation condition, the equipment fault can be prevented in advance, and the matching analysis is performed on the enrichment operation mode by combining the biomass prediction result and the equipment state influence condition. According to the method, the optimal matching mode can be selected, the pertinence and effectiveness of enrichment operation can be improved, the use of equipment is optimized, and the enrichment efficiency of target microorganisms is greatly improved.

This invention discloses a method and system for graded detection of aspirating smoke fires based on wireless networking, comprising the following steps: deploying nodes within the target monitoring area and extracting air samples from monitoring sub-areas; performing baseline smoke concentration learning, short-term disturbance removal, and continuous response segmentation on the original sampling sequence; extracting segment features, constructing local smoke response vectors for nodes, and determining local response states; transmitting data and performing time-series alignment on the uploaded data to form a node collaborative response matrix; determining the causal relationship, direction, and intensity of response transmission between monitoring sub-areas, and constructing a smoke propagation chain; performing regional aggregation and fire grade determination to generate graded detection results for the target abnormal area; and transmitting data to the nodes and outputting regionalized fire alarm information. This invention, based on wireless networking and Granger causality analysis, achieves multi-node collaborative graded detection, possessing advantages such as high positioning accuracy and strong anti-interference capability.

The utility model relates to the technical field of environment detection, and discloses adjustable environment monitoring equipment which comprises a fixing rod, a sampling rod is slidably connected to an inner cavity of the fixing rod, a sampling mechanism is fixedly connected to one side of the sampling rod, and a positioning mechanism is fixedly connected to one side of the sampling mechanism. Through the arrangement of the sampling mechanism, the problem that a traditional air detection device cannot continuously collect air samples at different heights is solved, the practicability of the device is improved, due to the arrangement of the rotating disc and the fixed disc, when a worker switches another sampling hole, other sampling holes can be covered by the rotating disc, and the sampling efficiency is improved. The number of the sampling holes is four, the four sampling holes correspond to the independent air conveying pipe and the independent connecting pipe, cross contamination of air at different heights and influence on the final detection effect can be effectively avoided, and due to the arrangement of the rotating rod, a worker can control the sampling rod to drive the rotating disc to ascend by pushing the rotating rod.

The invention discloses an air quality monitoring device which comprises multiple monitoring sensors and further comprises an unmanned aerial vehicle, and the multiple monitoring sensors are arranged on the unmanned aerial vehicle at intervals. The mounting bottom plate is mounted at the top of the unmanned aerial vehicle; the gas sampling pump is arranged on the mounting bottom plate; the multi-way reversing valve is mounted on the mounting bottom plate; the multiple directional control valve is communicated with the multiple collection tanks, and the collection tanks are arranged at intervals; and the supporting frame is arranged at the bottom of the unmanned aerial vehicle. The method is applied to an air quality monitoring process in a factory boundary area of a high-pollution factory building. The unmanned aerial vehicle inspects a plurality of detection points in sequence according to a pre-planned path, the unmanned aerial vehicle stops at each detection point for a period of time, in the stop time, the monitoring sensor monitors the air quality, and when the monitoring sensor displays that the air quality is abnormal, related workers are notified to perform air sampling; and subsequent traceability and repair work are facilitated. The acquisition cost and the maintenance cost of the monitoring device are low.

This invention relates to the field of environmental analysis and testing technology. Addressing the problems of limited specific surface area, uneven mass transfer during stirring, and low desorption efficiency in existing membrane or tubular enrichers, it provides a rapid enricher using a stirred silicone rubber filament bundle. This enricher consists of 2-300 silicone rubber filaments bound into a bundle by a fixed head, connected to an electric drill via a connecting rod, and can be rotated and stirred in water samples at 100-3000 rpm. After enrichment, the bundle is placed in a thermal desorption container, where organic matter is desorbed by heating and then detected by ion mobility spectrometry along with the carrier gas. Compared to membrane / tubular structures, the filament bundle has a larger specific surface area, stronger turbulence during stirring, and effectively improved enrichment efficiency. Furthermore, the filament bundle is flexible and not easily broken, making it suitable for rapid on-site detection of complex matrix water and air samples.

The invention discloses an air quality detection device with a telescopic sampling function, and relates to the technical field of air quality detection.The air quality detection device comprises a detection frame and a vacuum pump, a detection module is arranged in the detection frame, a sensor module is installed at the bottom of the detection module, and an exhaust pipe is arranged at one end of the detection frame; the vacuum pump is arranged at one end of the exhaust pipe, and a sampling pipe is mounted at the other end of the detection frame. The air quality detection device capable of sampling telescopically adopts a negative pressure sampling design, the detection frame is vacuumized through the vacuum pump to form stable negative pressure, an air sample quickly enters the detection frame without interference by using atmospheric pressure difference, and the sample can be sealed and isolated through cooperative control of the electric valve I and the electric valve II, so that the sample is prevented from being mixed with external air; and a sensor module consisting of a laser scattering sensor and a PID optical ion sensor is combined, so that the concentration of harmful gases such as particulate matters and VOCs can be accurately detected, and the accuracy and authenticity of sampling and detection data are comprehensively ensured.

The invention belongs to the technical field of environmental biological safety monitoring, and particularly relates to an RPA-CRISPR method for rapidly detecting pathogens in air. According to the invention, a two-step detection strategy integrating RPA isothermal amplification and CRISPR detection is established; the method specifically comprises the following steps: firstly, acquiring genome DNA of an air sample, and carrying out specific amplification on a trace target by utilizing an RPA technology; then, a product is introduced into a CRISPR-Cas12a system, and the trans-shear activity is recognized and activated by utilizing the specificity of crRNA, so that signal cascade amplification is realized. Pseudomonas aeruginosa is used as a model pathogen, and a primer and probe combination is designed aiming at a specific gene of the pseudomonas aeruginosa. Results show that the method can complete detection within 10-15 minutes at the soonest, the lowest detection limit can reach a single copy level (100 copies / L), and the method has the advantages of high environmental interference resistance, high sensitivity and no need of large instruments, and can meet the on-site rapid screening requirements of air pathogen aerosol in public places, medical environments and other scenes.

The utility model discloses an atmospheric pollution control, prevention and detection device capable of performing temporary treatment, and relates to the technical field of atmospheric prevention and detection equipment. The atmospheric pollution control, prevention and detection device capable of being temporarily treated comprises a mobile vehicle, and further comprises an air sampling assembly arranged right above the mobile vehicle and used for extracting nearby polluted atmosphere; the monitoring assembly is arranged at the bottom end of the air sampling assembly, and the monitoring assembly is used for monitoring the atmosphere pumped by the air sampling assembly; the air processing assembly is arranged on the surface of the bottom of the monitoring assembly, the output end of the monitoring assembly is connected with the output end of the air processing assembly in a conducting mode, the air component can be detected, the atmosphere can be temporarily processed, and therefore the influence of the polluted atmosphere on the environment can be reduced.

A mail hazard screening machine is configured to compress mail pieces or envelops through compression rollers and draw out this air and any hazard that may have been contained in the envelope. The system may be able to detect a wide range of hazards such as chemical, biological, radioactive, nuclear, explosive and drugs, abbreviated CBRNE+D. The sample air, the air drawn out from the hazard screening system, may be directed to one or more analysis devices and the mail processing machine may be stopped if any hazard is detected. The mail piece containing the hazard can then be found and further inspected safely. A mail feeder system may be configured to deliver mail pieces to the hazard screening system without compression of the mail pieces or envelopes.

The application discloses a trace volatile non-contact detection system and method based on a multispectral array sensor, and the trace volatile non-contact detection system based on the multispectral array sensor comprises a gas collection unit, which is suitable for introducing an air sample of a to-be-detected region into the system in a non-contact mode; and a detection cavity, which is in communication with the gas collection unit, and the inner wall of the detection cavity is made of an inert material. The application realizes ultrahigh-sensitivity detection, can accurately capture trace target substance volatiles, and a multispectral sensing array is subjected to specific band optimization for characteristic absorption peaks of the target substance, thereby abandoning a redundant design of continuous full-spectrum scanning, greatly improving the signal-to-noise ratio for specific targets, and cooperating with a multi-dimensional dynamic environment compensation mechanism to accurately correct signal baseline drift and nonlinearly adjust sensitivity, so that the detection level is far superior to that of a traditional electronic nose technology, and trace target substance volatiles in air can be effectively captured.

The invention discloses a full-spectrum neural network water quality monitoring method based on circulation type self-cleaning, and belongs to the technical field of water quality detection.Absorption spectral line data of a to-be-detected sample are collected and compared with air standard absorption spectral line data, and the similarity of a to-be-detected spectrum is calculated through a similarity function; the spectrum similarity threshold value is used for judging the liquid existence of the spectrum similarity to be detected, so that automatic liquid detection is completed, a liquid existence judgment result is obtained, targeted self-cleaning is achieved, dry brushing is avoided, and the service life of a brushing motor is greatly prolonged; moreover, according to the liquid existence judgment result and the cleaning condition of the flow cell, spectrum collection of the target sample is carried out, so that the accuracy of water quality monitoring is improved.

The utility model discloses a multi-point collection smoke dust detector, which belongs to the technical field of smoke dust detectors and comprises a smoke dust detector body and a sampling component, the sampling component comprises a vertical pipe and a bottom pipe, two guide grooves are arranged on the outer surface of the bottom of the vertical pipe, and the bottom of the vertical pipe is connected with the bottom of the bottom pipe. Through the structural design of the vertical pipe, the bottom pipe and the bearing piece, the filter screen can be conveniently and rapidly disassembled, the disassembly and assembly time is effectively shortened, the operation difficulty is reduced, and the maintenance efficiency of the filter screen is greatly improved; by means of the structural design of the collecting piece, air at multiple point positions can be efficiently sampled, collection of air samples is enriched, representativeness of the air samples is guaranteed, and accuracy of detection data is improved.