199 results about "Trace gas" patented technology

The invention relates to the technical field of gas monitoring, and discloses an air quality monitoring method based on an olfactory chip, which comprises the following steps: step 1, preparing a multi-modal sensor system which comprises an olfactory chip module, a surface enhanced Raman scattering module and a microfluidic time division multiplexing module, the sensor surface of the olfaction chip module is modified with a metal organic framework material, and the substrate of the surface enhanced Raman scattering module is made of a core-shell structure nano material; and 2, synchronously collecting resistance response data of the olfaction chip module, spectral data of the surface enhanced Raman scattering module and temperature, humidity and wind speed data of the environment sensor. According to the invention, a multi-modal sensor cooperative detection technical scheme is adopted, the high-sensitivity detection effect on low-concentration harmful gas in air is achieved, and compared with a technical scheme of a single sensor and a fixed fusion algorithm in the prior art, the defect that accurate recognition of trace gas cannot be realized under ppb-level concentration is overcome.

The invention belongs to the technical field of gas detection, particularly relates to a harmful gas concentration detection device for environmental monitoring, and solves the problems of insufficient airflow control and insufficient detection precision in the prior art. The spiral air flow guide plate, the servo motor and other structures are arranged, the air flow guide plate is designed to be of a right-handed spiral structure, gas enters the barrel in a laminar flow state through a gradually-shrunk channel of the air flow guide plate, turbulence interference is effectively reduced, and the air flow guide effect is improved. The rotating circular plate drives the sliding straight block to move in the radial direction through the inner spiral limiting block, the organ moving block is driven to form a dynamic sealing cavity, sucked airflow is compressed to a detection area, the collision frequency of target gas molecules and the detection assembly is remarkably improved, and therefore the capturing capacity of the device for trace gas is enhanced.

The invention discloses a method for observing and inverting regional methane emission based on satellite column concentration, which belongs to the technical field of atmospheric remote sensing monitoring, and comprises the following steps: step 1, modifying a CMAQ regional atmospheric chemical transmission model, adding CH4 species as trace gas to simulate an atmospheric transmission process, modifying an initial condition module and a boundary condition module in CMAQ, and establishing a CMAQ regional atmospheric chemical transmission model; the CH4 can be subjected to set simulation; 2, constructing a high-resolution nested emission inversion system based on a CMAQ region atmospheric chemical transmission model and an EnKF inversion algorithm; according to the high-resolution regional methane emission inversion system constructed through an innovative algorithm and program, satellite column concentration data can be directly assimilated, the uncertainty of CH4 emission estimation is remarkably reduced, and the CH4 simulation precision is improved. Meanwhile, the system has remarkable advantages in the aspects of CH4 emission monitoring and evaluation, and has important application value for realizing'carbon neutralization '.

The invention belongs to the technical field of optical fiber gas sensing, and discloses an optical fiber photoacoustic gas sensing system and method suitable for a low-pressure environment. The system comprises a programmable logic gate array circuit, a distributed feedback laser, a laser transmission optical fiber, an optical fiber photoacoustic sensing probe, a super-radiation light-emitting diode light source, an optical fiber circulator and a spectrograph. The air pressure is monitored according to the linear relation between the resonance frequency of the cantilever beam and the ambient air pressure, the characteristic that the acoustic sensitivity at the resonance position of the cantilever beam is enhanced under the low air pressure is utilized to make up for signal attenuation in the photoacoustic excitation process, and the sensitivity is corrected in combination with the air pressure measured by the cantilever beam. Therefore, high-precision and high-sensitivity detection of trace gas in a low-pressure environment is realized. The system only adopts a single cantilever beam and a single demodulator, has the functions of gas pressure and gas concentration detection, and can realize accurate detection of trace gas in a gas pressure change environment. And an all-fiber scheme is adopted, so that intrinsic safety is realized, and remote measurement and multi-point network group detection are easy.

The invention discloses a three-dimensional self-driven underwater air flow control system, and relates to the technical field of underwater air flow control, and the underwater air flow control system provided by the invention can realize transmission and control of trace gas at a microscopic level, so that new functions and applications which cannot be realized by some traditional liquid microfluids can be realized. Aiming at the defects of a two-dimensional airflow control system, the invention provides a new strategy for constructing a three-dimensional self-driven underwater airflow control system by using Laplace pressure difference in bubbles in combination with a Chinese traditional weaving technology and a super-hydrophobic metal wire. The two ends of the super-hydrophobic metal wires are curled into disc shapes with different sizes by utilizing a Chinese traditional weaving technology, and when the formed framework is immersed into water, the disc structures and the connecting metal wires are wrapped by a layer of retained air, so that a communicated airflow control system is formed.

The invention discloses a high-precision multi-channel gas control device for trace gas monitoring, and relates to the technical field of gas control. The high-precision multi-channel gas control device for trace gas monitoring comprises a gas inlet module, one end of the gas inlet module is provided with a circular sealing rotary connector, and the gas inlet module comprises a plurality of independent gas channels arranged in an annular array mode; under the driving of the high-precision harmonic speed reduction stepping motor, the circular sealing rotary connector can be quickly aligned with a target independent gas path channel, and the high-frequency response electromagnetic valve and the high-airtightness one-way valve are matched to complete channel switching; mutual interference of residual gas between the channels is avoided, in addition, the channel purging process is automatically executed by the purging module when the channels are switched, the residual gas can be removed, and efficient replacement can be carried out according to the calculated purging flow value and time.

Systems, devices, and methods including a mobile platform comprising: an in situ trace gas sensor, and a device configured to receive an open path laser beam, where the device is at least one of: a retroreflector to receive and return the open path laser beam and a detection device having processing electronics configured to interpret at least one of: a laser dispersion and an absorption signal.

A gas separation method includes supplying a mixed gas to a zeolite membrane complex and permeating a high permeability gas through the zeolite membrane complex to separate the high permeability gas from other gases. The mixed gas includes a high permeability gas and a trace gas that is lower in concentration than the high permeability gas. The molar concentration of a first gas included in the trace gas in the mixed gas is higher than the molar concentration of a second gas included in the trace gas in the mixed gas. The adsorption equilibrium constant of the first gas on the zeolite membrane is less than 60 times that of the high permeability gas. The adsorption equilibrium constant of the second gas on the zeolite membrane is 400 times or more that of the high permeability gas.

Systems, devices, and methods including an aerial vehicle having a global positioning system (GPS) and at least one trace-gas sensor configured to generate gas data; and a processor having addressable memory, the processor configured to: determine a flight envelope based on a received spatial location, a received spatial location of the one or more potential gas sources, a received desired level of confidence, and a received wind data; determine a flight path for the aerial vehicle, where the flight path covers a portion of the determined flight envelope; and determine based on a received gas data whether a gas leak is present in the received spatial location to the received desired level of confidence.

The invention discloses a planetary atmospheric trace gas spectrum telemetering and in-situ fusion detection system and method, and belongs to the technical field of deep space exploration. The detection system has a telemetering mode and an in-situ detection mode, and comprises a telescope module, a laser light source module, a heterodyne spectrum telemetering module, an in-situ absorption spectrum module, a gas sampling and enriching module and a signal acquisition, processing and control module. In the on-orbit stage, a heterodyne spectrum telemetering module is adopted, and a laser light source and sunlight signals are subjected to frequency mixing for atmospheric component telemetering; and after the detector enters an atmospheric descending section, the in-situ absorption spectrum module performs in-situ absorption spectrum measurement by utilizing the detection light of the same laser light source. By performing space-time fusion and joint inversion on the data acquired in the two modes, coherent detection from large-range general survey to fixed-point detailed survey is realized, the problems of load separation of telemetering and in-situ detection and difficulty in data fusion are solved, and the detection efficiency, the data consistency and the integration level of the system are greatly improved.

A method for eliminating the influence of gas generated in underground paint spraying operation on the precision of an electrochemical sensor comprises the following steps: firstly, designing an analysis experiment aiming at the influence degree of the gas generated in the paint spraying operation on an underground common electrochemical gas monitoring sensor, and supplementing the blank of the research; meanwhile, the influence quantity of gas generated in the paint spraying operation on the gas sensors along the road in the flowing path and process is monitored by using a mature underground tracer gas method for detecting the wind direction and the air leakage quantity; finally, on the basis of an artificial intelligence algorithm, the influenced gas sensors are corrected in a targeted manner, the authenticity of data of each gas monitoring sensor is improved, and the method has the advantages of correcting the monitoring data of the electrochemical gas sensors, comprehensively evaluating the safety condition of a coal mine and timely discovering and processing potential safety hazards. And the device plays an important role in ensuring the life health and safety of miners.

The utility model discloses a human body exhaled VOC gas detection device relates to VOC gas detection technical field, including gas detector and detection probe, the detection probe is provided the top end of gas detector, the top end of gas detector is provided with the protection subassembly outside the detection probe, and the protection subassembly is provided with the detection probe. The protection assembly comprises a transparent box and a plastic joint, and the transparent box and the plastic joint are welded with each other; the detection probe disclosed by the utility model can be in full contact with gas in the transparent box for detection, so that the gas in the transparent box is prevented from being influenced by the gas outside the transparent box, the transparent box does not need to be held for a long time, and keys of the gas detector are convenient to operate; when the detection probe pushes the limiting sleeve to move, external gas entering the sliding plate can be reduced, the gas concentration in the transparent box can be increased, and VOC trace gas in the transparent box can be detected more easily.

The invention relates to the technical field of error analysis, in particular to a trace gas multi-filling repeatability error analysis and compensation method which comprises the following steps: collecting gas pressure pulsation data and container inner wall adsorption layer thickness change data in a filling stage; inputting the pressure pulsation data into a dynamic coupling analysis module to calculate correlation degree parameters of an adsorption hysteresis effect and a pressure fluctuation frequency spectrum; an adsorption-pressure dynamic coupling correction model is established through a phase-space reconstruction algorithm, and composite correction parameters including the valve response lead and the temperature compensation slope are generated; and the composite correction parameters are input into a filling execution mechanism, and reconstruction of an electromagnetic valve control time sequence and dynamic correction of a temperature control curve are completed before the next filling cycle is started. According to the method, the deep coupling characteristics causing the filling error can be identified, and the sensitivity and pertinence of error analysis are improved.

The invention relates to an air tightness detection device and method based on resonance frequency shift of a resonant cavity, belongs to the technical field of air tightness detection, and aims to solve the problems of high equipment cost, complex operation, low efficiency and difficulty in realizing multi-parameter quantitative detection in the traditional air tightness detection technology. High-purity helium with rated pressure is filled into a to-be-detected piece through a gas compressor, the to-be-detected piece is placed in a volume-adjustable detection container after pressure maintaining, and leaked helium is pumped by a vacuum pump to flow into a resonant cavity; resonance frequency deviation caused by helium concentration changes is monitored, temperature and humidity calibration data are combined, three air tightness parameters including the leakage rate (Pa.m / s), the leakage speed (mL / min) and the leakage pressure (Pa) are calculated in real time through a microcontroller, and the air tightness grade of a to-be-detected piece is output according to the air tightness detection standard. According to the device, the volume of the detection container is adaptively adjusted through the sliding rail, and the detection efficiency and adaptability can be remarkably improved by combining frequency mixing excitation and a rapid frequency calibration technology; according to the method, resonance frequency shift-helium concentration-airtightness parameters are converted, and high-precision, multi-parameter and integrated airtightness detection is realized. The invention has the advantages of fast response speed, strong anti-interference performance, low cost and the like, is suitable for fast automatic leak detection of industrial products such as sealing devices, pressure containers and the like, and provides a new scheme for trace gas detection and gas tightness grading.

The invention provides a method for remote sensing detection of a Jinstar intermediate layer atmosphere horizontal wind field profile by using a microwave limb radiometer, and the method comprises the steps: designing a detection channel of the Jinstar intermediate layer atmosphere horizontal wind field profile based on the characteristics of a Jinstar gas spectral line, obtaining radiation brightness temperature observation values of the detection channel at different tangent heights in two orthogonal directions through a microwave limb radiometer carried by a star orbiter; the characteristics of the golden star gas spectral lines are as follows: in a microwave frequency band, the golden star atmospheric trace gas spectral lines are rich and have obvious absorption peaks, and the high-speed atmospheric motion of the middle layer enables the gas absorption spectral lines to generate obvious Doppler frequency shift; and through physical iteration inversion, inversion is carried out based on the radiation brightness temperature observation value to obtain a golden star intermediate layer atmosphere horizontal wind field profile. The method has the advantages that back scattering and other intermediate processes are not needed, the method is basically not affected by ground surface high-temperature radiation, and continuous, stable, high-temporal-spatial-resolution and high-precision star intermediate layer atmosphere horizontal wind field profile information can be obtained all day long.

The invention belongs to the technical field of gas-phase iodine and liquid-phase iodine detection, and particularly relates to a combined method for measuring the concentration of trace gas-phase iodine in a containment and analyzing forms of various types of iodine. Comprising the following steps: preparing and selecting alkaline absorption liquid, collecting trace gas-phase iodine and liquid-phase iodine samples, establishing an iodine concentration standard curve, measuring the gas-phase iodine samples, establishing an iodine form-concentration standard curve, measuring the liquid-phase iodine samples and the like. The combined method is based on the combined method of monitoring the total concentration of gaseous iodine and chemically analyzing the form of iodine in the pit liquid pool, and can measure the trace gaseous iodine concentration in different areas at different time and monitor the form of iodine in the pit liquid pool at different moments; and dynamically carrying out migration analysis of gaseous iodine in a gas phase space in the containment and chemical evolution analysis of iodine in a water pool.

A photoacoustic sensor for spectroscopic gas detection includes a chamber to contain the gas; an excitation laser source that emits a modulated laser beam; a transducer, having a reflective portion, located inside the chamber; an interferometer having first and second arms and an output, the first arm ending in the transducer, and the second arm including an optical path changer element and an actuator connected to the optical path changer element to change the optical path defined by the second arm of the interferometer; a first polarizing beam splitter; a second laser source; a second polarizing beam splitter; a first detector; a second detector; an electronic circuit; and a feedback loop adapted to command the movements of the actuator in order to change and stabilize the optical path of the second arm, so that the difference signal is kept equal to a desired constant value during the gas concentration measurements.

The invention discloses a system and method for testing the flammability of a gas holder, the interior of the gas holder comprises a plurality of pipelines, valves and electrical connection points, and the system at least comprises a tracer gas container which is communicated with a gas simulation release point through a tracer gas pipeline and is used for releasing tracer gas at the gas simulation release point; the gas simulation release point is located at the joint of a valve and a pipeline in the gas holder; each detector is communicated with a monitoring point through a sampling pipe; the monitoring points are at least arranged at electrical connection points in the gas holder; the controller is in signal connection with the detector; the plurality of detectors are used for collecting tracer gas concentration values of a plurality of monitoring points and sending the tracer gas concentration values to the controller; and the controller is used for comparing the tracer gas concentration value at the monitoring point with a preset tracer gas concentration value so as to judge whether the flammability test of the gas holder is passed or not. According to the invention, the test accuracy and test efficiency of the flammability test of the gas holder are greatly improved, and the method is environment-friendly and has a wide application prospect.

The present invention discloses a vibrating tube densitometer for small mass flow measurement, which comprises a housing, a flange, a bracket, a vibrating tube assembly and a wiring sealing structure; the measuring tube includes an input pipeline, an output pipeline, a fluid flow tube, a flow equalizing tube and an accelerating tube, the flow equalizing tube includes a shunt inlet, a shunt outlet and a spiral tube, and a plurality of alternately connected first passages and second passages are arranged inside the accelerating tube. The liquid containing trace gas is first shunted through the flow equalizing tube to form small bubbles. Due to gravity, most of the liquid flows from the lower passage of the first passage to the second passage, and the bubbles in the fluid will float up, and a small part of the bubbles will adhere to the upper wall and stay in the first passage. After the fluid enters the second passage, a small amount of fluid passes through the upper passage of the second passage and causes the floating bubbles to stay. After multiple operations, the gas will not be discharged with the liquid, so that only the liquid part without gas is metered, thereby improving the metering accuracy.

The utility model discloses a device for determining the hole sealing depth of a coal seam gas extraction drill hole, and belongs to the field of coal mine underground gas extraction. The device comprises a tracing gas cylinder, a bundling pipe, an automatic valve, a flow sensor, a pressure sensor, an extraction pipe and an SF6 detector. The tracer gas cylinder is connected with a bundling pipe, the bundling pipe is communicated into the tracer gas chamber, a pressure sensor is arranged in the tracer gas chamber, a flow sensor and an automatic valve are arranged in the bundling pipe, the bundling pipe is communicated into the tracer gas chamber, and the extraction pipe is connected with an SF6 detector. The device solves the problems that in the prior art, the tracer gas detection precision is insufficient, the leakproofness of a hole sealing area cannot be judged, the hole sealing depth quality evaluation time is long, and the precision is low. Through intelligent and automatic improvement, accurate and rapid detection of the concentration and pressure of the tracer gas in the tracer gas chamber is realized.

The invention provides a drilling gas cut monitoring method and device based on a magnetic induction effect, and the method comprises the steps: pumping drilling fluid carrying magnetic particles marked by a magnetic marker into a shaft, and measuring the nearby magnetic field intensity through a magnetic signal induction short section arranged at the bottom of the shaft to obtain magnetic field data; and acquiring gas cut monitoring data according to the change condition of the magnetic field data in the preset period. Therefore, by monitoring the magnetic signal which responds to the gas cut very quickly, advanced early warning of the early trace gas cut is realized, and the response speed and sensitivity are superior to those of a sound wave or resistivity method; by actively introducing a magnetic marker and adopting a differential detection and temperature compensation algorithm, the problems that a resistivity method is greatly interfered by a stratum and a sound wave method is seriously influenced by well conditions and noise are effectively solved, the anti-interference capability is high, and the reliability is high.

The present invention discloses an air-conditioning drainage component, comprising a three-way joint, the upper end of the three-way joint is connected with the lower end of an exhaust pipe, a cone structure is installed at the lower end of the three-way joint, a transverse drainage hole connected with the interior is opened at the position where the three-way joint contacts the cone structure, the middle end of the three-way joint is connected with one end of an air-conditioning drainage pipe, and the other end of the air-conditioning drainage pipe is connected with an air-conditioning drainage port through a joint, the exhaust pipe and the cone structure are installed inside the drainage pipe, the air-conditioning drainage component utilizes a closed cone structure to divert the rising gas 360°, diffuses the gas toward the peripheral direction around the drainage component, reduces the gas flow around the transverse drainage hole of the drainage component, designs the exhaust pipe to be higher than the air-conditioning drainage port, utilizes the air pressure difference to draw out the trace gas entering from the transverse drainage hole, and ensures that the gas refluxes into the air-conditioning drainage pipe is completely blocked by three-level drainage.

The invention relates to a gas-sensitive sensor technology, and particularly discloses a gas-sensitive sensing device based on a three-dimensional bionic spiral step structure, which comprises a three-dimensional bionic spiral step substrate, a flexible electrode mounted on the inner wall of the three-dimensional bionic spiral step substrate, and a gas-sensitive film deposited on the surface of the flexible electrode. According to the device, trace gas such as volatile organic compounds and the like entering the gas chamber can be guided by the specific three-dimensional bionic spiral stepped structure to bypass along a spiral path for multiple circles and repeatedly sweep over the surface of a gas sensitive film, so that the effective contact opportunity of gas molecules and a sensitive layer is remarkably increased. By simplifying the installation mode of the three-dimensional bionic spiral stepped substrate and the flexible electrode, the background interference of small organic molecules slowly released in the curing and aging process of a traditional adhesive on trace gas detection is avoided. Meanwhile, the idea of parallel connection of multiple sensors is provided, and the problems that an existing gas sensitive sensor of a plane structure is insufficient in low-concentration gas detection sensitivity and high in detection limit are effectively solved.

The invention relates to the technical field of differential absorption spectrum inversion, and discloses an ozone precursor monitoring method and system based on a two-channel differential absorption spectrum and nonlinear inversion, a terminal and a storage medium, the method comprises the following steps: synchronously obtaining a target spectrum and a reference spectrum of a target area to calculate a multiband atmospheric differential optical thickness; building a combination model based on the difference optical thickness of each wave band, dividing a fitting window, and obtaining the difference inclined column concentration through multi-angle fitting; and inverting a vertical concentration distribution profile of the ozone precursor by using different sensitivities in combination with a radiation transmission model and a logarithmic space iterative inversion algorithm. According to the invention, through a high-performance dual-channel spectrometer observation system and a high-precision nonlinear inversion algorithm, high-spectral-resolution measurement of ultraviolet-visible light full wavebands is realized, logarithmic space processing is introduced in inversion, the inherent problems of strong nonlinearity and large dynamic range of a vertical profile of aerosol and trace gas are effectively solved, and the measurement accuracy is improved. And the measurement precision and stability are improved.

The invention relates to the technical field of gas analysis, in particular to a trace gas inlet device and method suitable for the front end of a gas chromatograph, and the device comprises a sample tank assembly, a vacuum system, a cryogenic unit, a pulse flushing system, a flow path control assembly and a residual sample storage assembly; the sample tank assembly fixes a copper pipe containing trace gas through a copper pipe fixer, the vacuum system vacuumizes to eliminate interference, the cryogenic unit realizes complete gas release through low-temperature enrichment, the pulse flushing system cleans a pipeline, and the flow path control assembly accurately distributes the gas flow direction through a three-way diverter valve. And the residual sample storage assembly transfers residual gas to an external gas storage tank by using a micro sucking pump. The device realizes high-efficiency lossless sample injection of a trace closed gas sample, improves analysis precision and reliability, supports multiple recheck of the sample, can be seamlessly connected with an existing gas chromatograph, and has important practical value in exploration and analysis of strategic gas resources such as helium and natural hydrogen.

The invention belongs to the related technical field of detection instruments, and provides a miniature automatic trace gas detector which comprises a camouflage shell and optical detection mechanisms arranged on two sides of an optical detection chamber in the camouflage shell, the optical detection chamber capable of automatically performing gas circulation through the circulation mechanism is arranged in the smaller camouflage shell, so that automatic collection of gas is realized, spectral absorption of the gas is detected through the optical detection mechanism, the content of trace gas in environmental gas is judged, food safety judgment is facilitated, and the detection efficiency is improved. Compared with the existing handheld gas detector, the gas detector provided by the invention can more conveniently realize hidden and automatic gas detection, is convenient to carry, and can realize rapid and effective food trace gas detection in a scene with detection hindrance.

The invention provides a differential photoacoustic gas sensing system and method based on cross-correlation demodulation, and is suitable for the fields of trace gas monitoring, industrial process fine control and environment detection. The system comprises a gas excitation light source, a symmetrical double-probe gas sensor, an optical fiber circulator, a wide-spectrum light source, a 1 * 2 optical fiber coupler, two pieces of plain glass, a photoelectric detection array and a computer, acoustic wave signals excited by the photoacoustic effect generate difference superposition cavity length changes on the symmetrically-arranged double cantilever beams, and environment noise triggers cavity length responses which are counteracted in the same direction. The system adopts an optical cross-correlation demodulation algorithm to track peak displacement of a cross-correlation function in real time, dynamically demodulates cavity length change information, and inverts the gas concentration according to the information. According to the design scheme, effective photoacoustic signals are remarkably enhanced, meanwhile, effective suppression of environment vibration noise is achieved, and finally the trace gas detection system integrating the advantages of miniaturization, high sensitivity and low cost is constructed.

The invention discloses a flow detection device with environment temperature and humidity and gas concentration recognition, and relates to the pneumatic field, the flow detection device comprises a gas pipe partial pressure part and a gas flow monitoring part, the gas pipe partial pressure part comprises a gas flow pipeline and a partial pressure hole, the partial pressure hole is embedded in the center of the inner wall of the gas flow pipeline, the diameter range of the partial pressure hole is 2-6 mm, and the gas flow monitoring part is connected with the gas flow pipeline. The partial pressure hole is used for dissipating air flow in the air flow pipeline to the outside, the partial pressure hole is connected with the air flow monitoring part through a soft air pipe, and the soft air pipe is used for stably guiding dissipated air into the air flow monitoring part; through the design of the partial pressure hole of the partial pressure part of the gas pipe, the stable transmission of the soft gas pipe, the friction electric signal collection of the contact layer and the copper film, and the Bernoulli equation, the gas flow is calculated, the problem that the sensitivity of a traditional sensor is insufficient in the 10Pa extreme vacuum environment is solved, and the high-precision detection of trace gas flow in the vacuum environment is realized.

The application discloses a seawater trace gas identification method based on multi-color column cooperation and machine learning, relates to the technical field of gas chromatography analysis, and comprises the following steps: preparing a gas sample to be identified and performing gas chromatography detection on the gas sample; performing denoising, normalization processing and outlier rejection on the gas chromatography; extracting manual peak characteristics and time sequence peak characteristics to form a multi-dimensional feature set; performing hierarchical screening on the feature set and retaining core features; constructing a KNN model and a CNN model double-model fusion architecture; dividing the features into a training set and a verification set, training and verifying the double-model architecture, and optimizing double-model architecture parameters; and applying SHAP analysis to the model decision process to generate a feature importance visualization report. The application does not need to rely on accurate standard sample calibration, efficiency and adaptability are improved, personalized detection demands of different scenes are adapted, SHAP technology is introduced to clearly determine the contribution degree of key identification features, and interpretability and reliability are enhanced.

The utility model discloses an air control mud conversion device which comprises a closed mud storage container, an air inlet connector, an elastic leather bag and a mud outlet connector. The slurry is placed in the closed slurry storage container; the air inlet joint and the slurry outlet joint are both mounted on the side wall of the closed slurry storage container; the elastic leather bag is arranged in the closed slurry storage container and is communicated with one end inside the air inlet connector, and one end outside the air inlet connector is connected with air pressure input; one end inside the slurry outlet joint is communicated with the inside of the closed slurry storage container, and one end outside the slurry outlet joint is communicated with the slurry pressure chamber. According to the device, the gas in the leather bag is effectively isolated from the slurry, so that trace gas is prevented from entering the slurry, and the output amount of the slurry is accurately controlled.