104 results about "Leakage rate" patented technology

The invention relates to the technical field of sealing performance testing, in particular to a breather valve performance online testing method for oil and gas storage and transportation, which comprises the following steps: acquiring a vibration signal of a breather valve body, a multi-band acoustic signal of a valve port and a total pressure signal in a storage tank; performing multi-scale complex wavelet decomposition, and constructing a time frequency-energy correlation feature tensor; the total pressure signal and the time frequency-energy correlation characteristic tensor serve as a combined observation value and are input into a preset continuous Gaussian mixture hidden Markov model containing four hidden states of sealing, transient micro-leakage, continuous leakage and full-amount opening, and the posterior probability is calculated; and calculating to obtain a real-time leakage rate. According to the method, the opening pressure can be accurately determined, the real-time leakage rate can be quantitatively calculated after the leakage state is recognized, comprehensive and accurate quantitative online evaluation of core performance parameters of the breather valve is achieved, and the multi-source information fusion degree and the anti-interference capacity are improved.

The invention relates to the technical field of generator state monitoring, in particular to a leakage detection method and system for an ORC generator set, and the method comprises the steps: firstly, synchronously collecting system key operation parameters and environment concentration data; then, matching the pressure value with a pre-generated and load-divided leakage-free reference model, and calculating a theoretical pressure value and a real-time deviation; and a three-dimensional state judgment matrix is innovatively constructed and applied to perform combined logic judgment on a pressure deviation level and an environment concentration level, so that step-by-step diagnosis from micro-leakage early warning to serious leakage alarm is realized. After the leakage is confirmed, the leakage rate can be estimated, and the possible leakage area can be positioned in an assisted manner. According to the method, early-stage, sensitive, automatic and intelligent detection and diagnosis of leakage of the ORC generator set are realized, and the operation safety and the maintenance efficiency of the set are remarkably improved.

The invention discloses a sealing structure for a test, and an aging test and leakage rate detection method and system. The sealing structure comprises a tested sealing assembly and an air cavity assembly integrated in the tested sealing assembly, and serialized test samples with different filling rates and compression rates are formed by regulating and controlling the groove width and the groove depth of a sealing ring mounting groove so as to simulate various actual sealing states. An aging test adopts a multi-factor coupling accelerated aging method, and a plurality of material characterization means are combined to systematically evaluate the evolution rule of the sealing performance. According to leakage rate detection, static pressure maintaining and dynamic pressure adjusting dual-mode measurement is achieved through an air tightness detector, and the sealing characteristics under different pressure conditions are comprehensively reflected. According to the invention, direct and systematic detection of the leakage rate of the sealing structure is realized, and an innovative solution is provided for sealing performance evaluation and service life prediction of electrical equipment.

The embodiment of the invention provides a liquid leakage detection method and system, a storage medium, an electronic device and a computer program product, and the method comprises the steps: obtaining an infrared image and space mapping information of at least one liquid-cooled cabinet, processing the infrared image through a pre-trained liquid leakage detection model, obtaining a segmentation mask of a leakage region and a non-leakage region, and obtaining the segmentation mask of the leakage region and the non-leakage region; and determining a central physical coordinate of the leakage area according to the segmentation mask, and determining a leakage position according to the space mapping information and the central physical coordinate. According to the technical scheme of the invention, the method can effectively solve the problems in the prior art that the plug-in box level leakage detection of a vertical liquid-cooled cabinet, especially the defects in the aspects of leakage source positioning and the like, achieves the effects of improving the detection precision and response speed under the condition of tiny leakage, and avoids the serious fault of a data center caused by liquid leakage. According to the embodiment of the invention, the leakage reason and the leakage rate can be identified by using deep learning, so that the response speed of operation and maintenance personnel is improved.

The invention relates to a leak rate detection device and method based on a laser emission resonant cavity. The leak rate detection device comprises a resonant cavity; a laser transmitter; the conversion device is used for converting the photoacoustic signal into an electric signal; and the processing device converts the electrical signal into a leak rate Q. The leakage rate detection method comprises the following steps: setting an acousto-optic resonant frequency f of the resonant cavity; the wavelength of the laser emitted by the laser emitter is modulated, and the modulation frequency is the same as the acousto-optic resonance frequency f; controlling a laser transmitter to transmit modulated laser to an incidence window, and enabling the laser to irradiate the interior of the resonant cavity after passing through the incidence window; the characteristic gas absorbs the laser to generate vibration, and a photoacoustic signal is generated; collecting a photoacoustic signal by using a conversion device, and converting the photoacoustic signal into an electric signal; modulating the electric signal to obtain the oxygen concentration in the resonant cavity; and obtaining the leakage rate Q of the semiconductor cavity according to the oxygen concentration. According to the invention, the leakage condition of the semiconductor chamber can be accurately detected without shutdown.

The rotary four-way arbitrary intercommunication valve comprises a valve body and a valve element, and the valve element extends into the valve body and is in running fit with the valve body. And the valve core is used for switching the communication between any adjacent ports and the communication between the opposite ports every time the valve core rotates by 45 degrees in the valve body through the layered flow channel structure between 0 degree and 180 degrees. The four-way valve is composed of the valve body and the valve element, switching of any two-to-two communication among the four ports is flexibly controlled by rotating the angle of the valve element, mutual communication of the ports with specific flow direction combinations is supported, the function of dynamic random communication of the four ports is achieved, the sealing performance between the valve body and the valve element is improved, and the sealing performance of the valve body and the valve element is improved. The overall structural design is compact and simple, the characteristics of layered flow channels and high sealing performance are achieved, and the leakage rate is greatly reduced. The invention further discloses a rotating method for rotating the four-way arbitrary intercommunication valve.

The embodiment of the invention provides a parameter space degree of freedom determination method and device, electronic equipment and a storage medium, and the scheme is as follows: according to a first working frequency and a second working frequency corresponding to a first quantum bit and a second quantum bit under the condition that the frequency detuning is 0, and a third working frequency of an adjustable coupler under a preset gate length, determining the degree of freedom of a parameter space; calculating target coupling strength; according to periodic quantum logic gate operations on the first quantum bit and the second quantum bit under different frequency detuning conditions, obtaining a first corresponding relation between frequency detuning and a leakage rate, and obtaining a second corresponding relation between frequency detuning and a preset condition phase; and based on the first corresponding relation and the second corresponding relation, obtaining first detuning and second detuning corresponding to the lowest leakage rate under the target phase as target detuning parameters. According to the technical scheme provided by the embodiment of the invention, the influence of the distortion of the residual short time scale on the magnetic flux control line on the quantum calculation process can be avoided, so that the fidelity of quantum calculation is improved.

A micro-channel membrane for use with high-temperature molten salts used with high-temperature reference electrodes (HTREs). The micro-channel membrane includes a ring having an opening with an opening surface and a plug positioned within the opening with a plug surface. The opening surface and the plug surface contact and interface with each other to form a plurality of micro-channels. The opening surface and the plug surface may be tapered. The opening surface and / or the plug surface may have a surface configuration to facilitate formation of the micro-channels, such as a plurality of facets, a helical channel, a roughened surface, a channel pattern, or a knurled surface pattern. One or more tack welds may secure the plug within the ring. A method for making the micro-channel membrane may include measuring a leak rate through the micro-channels and securing the plug when a target leak rate is measured.

The application discloses a gas chromatograph leakage monitoring method and response system based on dynamic volume balance, comprising the following steps: obtaining the flow measurement value of the carrier gas on the secondary gas circuit, the total flow measurement value of the carrier gas at the sample inlet end of the gas chromatograph, the flow measurement value of the carrier gas at the detector end of the gas chromatograph, and the second correction value of the carrier gas in the pipeline between the secondary gas circuit and the gas chromatograph; obtaining the secondary volume imbalance term based on the dynamic volume balance method; obtaining the to-be-processed data of a frame of time length T flow signal, calculating the second average value based on the to-be-processed data; calculating the second leakage rate between the secondary gas circuit and the gas chromatograph according to the secondary volume imbalance term and the second average value, and judging the leakage condition between the secondary gas circuit and the gas chromatograph based on the second leakage rate. The application can solve the problem of poor sensitivity and accuracy of the leakage condition monitoring of the gas circuit system.

The application provides a molecular gas chamber leakage rate detection method, an electronic device and a detection system. The method can include: testing spectrum data of a to-be-detected molecular gas chamber; calculating a half-height width of the spectrum data according to the spectrum data; and determining a leakage rate of the to-be-detected molecular gas chamber based on the half-height widths obtained at multiple times. In the method, the leakage rate detection accuracy of the molecular gas chamber can be better ensured without affecting the purity in the molecular gas chamber.

The invention discloses a pilot operated safety valve state monitoring method and device with helium online leakage detection, and relates to the technical field of industrial process safety and equipment state monitoring, and the method comprises the steps: installing a microcavity leakage collection module on a to-be-detected pilot operated safety valve, connecting a helium online analysis subsystem and a tracing gas source through a pipeline, and carrying out the detection of the helium online leakage detection of the to-be-detected pilot operated safety valve; starting a vacuum pump set to vacuumize to a working vacuum degree; pure nitrogen is introduced to eliminate background helium, sampling analysis is performed after an interface is closed, and a helium background signal is recorded as a base line; low-concentration helium mixed gas is injected at a controlled speed, a tracing environment is constructed, and helium concentration, pressure and temperature multi-dimensional time sequence data are synchronously collected and preprocessed; inputting the data into a composite artificial intelligence model to judge a leakage state and divide alarm grades; the leakage rate is analyzed, the remaining life is calculated, monitoring information is uploaded to an upper-layer system, multi-channel notification is triggered, and monitoring is completed. Through the helium mass spectrum and the edge AI technology, accurate real-time monitoring is achieved, and the problem of off-line lag misinformation is solved.

The application discloses a battery box for immersion direct cooling, and belongs to the technical field of battery thermal management. The battery box comprises a box body and a cover plate, and forms a closed chamber. The bottom plate of the box body is provided with a module support frame, so that the battery module is kept at a gap of 0.5-2.5 cm with the bottom plate and a gap of 1-5 cm with the side wall. At least one wall of the box body is provided with an arc-shaped flow uniforming plate, the included angle between the tangent of the edge of the flow uniforming plate and the reference plane is 5-37 degrees, and the height of the flow uniforming plate is 1 / 3-1 times the height of the battery cell. The angle of the flow uniforming plate is adjustable, the 0-90-degree adjustment is realized through a hinged mechanism with an arc-shaped sliding groove, the bottom spring device makes the inclination angle change automatically with the flow rate, and the angle of the base can be automatically adjusted according to the preset judgment rule based on the temperature rise rate and the temperature difference of the thermocouple transmission. The box body is provided with a safety pressure relief valve. The liquid inlet is provided on the opposite wall of the box body to form liquid hedging, the liquid outlet is provided on the cover plate, and the connecting direction of the liquid inlet is the same as the thickness direction of the battery cell. The box body is subjected to 1.5 times working pressure hydrostatic pressure test and helium mass spectrometry leak detection verification, and the leakage rate is less than or equal to 1*10-3 Pa*m3 / s. The application can significantly improve the battery temperature consistency, reduce the temperature rise, prolong the battery life and improve the system safety under the condition of low pump consumption.

The invention discloses a method for predicting the sealing leakage rate of a fuel cell stack, and belongs to the technical field of fuel cells. The method comprises the following steps: acquiring first sealing data of a piano key area and second sealing data of a symmetric area of the fuel cell stack; based on a preset leakage channel height model, obtaining a height distribution function according to the first sealing data and the second sealing data; and according to the height distribution function and the obtained leakage gas attribute and leakage channel attribute of the fuel cell stack, predicting the leakage rate of the fuel cell stack seal. Wherein the height distribution functions comprise a first height distribution function, a second height distribution function and a third height distribution function which are respectively used for predicting the leakage rates of the symmetric area and the piano key area, and further predicting the overall leakage rate. The invention also provides a corresponding prediction device, equipment and a computer readable storage medium. The method can accurately predict the sealing leakage rate of the fuel cell stack, and improves the design and manufacturing efficiency of the fuel cell stack.

The invention discloses a hydrogen and fuel gas leakage detection method and system based on multi-mode fusion, and belongs to the technical field of industrial safety monitoring. The system comprises a tunable diode laser absorption spectrum remote sensing module, an ultrasonic sensor array, a dynamic thermal infrared imager, a palladium-based hydrogen sensor array, an environment sensor, a central processing unit and a man-machine interaction terminal. The method comprises the following steps: synchronously acquiring multi-modal sensing data; acoustic, optical, chemical and environmental characteristics are extracted in parallel; space-time correlation and fusion are carried out on multi-source features on the feature level, gas types are identified, and the leakage rate is quantified; and performing adaptive decision making and alarming based on a fusion result. Through deep feature fusion and collaborative analysis of multi-modal information, inherent limitations of a single detection technology in the aspects of sensitivity, specificity, positioning precision and complex environment adaptability are solved, and early warning, accurate positioning, dynamic tracking and quantitative evaluation of hydrogen and gas leakage are achieved.

The invention discloses a high-pressure gas insulation equipment O-shaped ring sealing leakage rate prediction method, and relates to the technical field of high-pressure power transmission and transformation equipment sealing, and the method comprises the steps: obtaining the contact mechanical parameters of an O-shaped sealing ring through the contact mechanical calculation of an O-shaped ring; respectively determining an average flow factor and a smooth gap reference mass leakage rate according to the contact mechanical parameters; and the leakage rate of the rough surface is determined and obtained through the average flow factor and the smooth gap reference quality leakage rate, and O-shaped ring sealing quantitative evaluation is achieved. And parameter information capable of realizing quantitative evaluation of O-shaped ring sealing is determined through organic combination of the determined contact mechanical parameters, random rough surface numerical representation and model construction. A leakage rate prediction strategy for the high-pressure O-shaped sealing ring is formed, and powerful technical support is provided for sealing reliability evaluation and sealing design of high-pressure switch equipment.

The application relates to the technical field of electric power, and discloses a gas leakage fault diagnosis technology for a gas insulated device. In view of the problem that the resolution of a density relay output P20 value is too low and the gas insulated device cannot be effectively diagnosed whether a slight leakage occurs, a heat transfer model between the gas insulated device and an application environment is constructed by using the law of conservation of energy, a recursive relationship of the gas temperature inside the gas insulated device is derived, the gas temperature obtained by the recursive model is fitted with the real gas temperature by using the least square method, the time constant of the gas insulated device when heat transfer with the external environment occurs is obtained, the P20 of the insulating gas is obtained, the sliding window average algorithm and the data trend fitting algorithm are used to eliminate the high-frequency interference of the environment, the leakage diagnosis capability of the system is greatly improved, and the residual safe leakage time of the gas is estimated according to the leakage rate, thereby providing support for the scientific and efficient operation and maintenance of the gas insulated device.

This invention provides a method and system for testing the airtightness of metal-supported solid oxide fuel cells. The method involves placing the battery under test in a main test chamber, connecting a reference chamber to the main test chamber via a differential pressure sensor, and simultaneously applying a vacuum to both chambers. After vacuuming, the temperatures in the main test chamber and the reference chamber are adjusted to the test temperature. Gas at the same temperature is then introduced into the main test chamber until a set pressure is reached. The leakage rate of the battery is calculated using the differential pressure value from the differential pressure sensor. If the leakage rate meets the requirements, the absolute pressure in the main test chamber and the reference chamber is reduced, and the presence of any minute leaks in the battery is determined using the differential pressure value from the differential pressure sensor. This invention also provides a battery airtightness testing system for implementing the above method. This invention is simple to operate, has high testing accuracy and precision, good safety, and can meet the airtightness testing requirements of batteries under various operating conditions, from low-temperature start-up to high-temperature operation.

The embodiment of the invention provides a frequency determination method and device, electronic equipment and a storage medium. According to the scheme, the method comprises the following steps: obtaining a first corresponding relation between coupler frequencies and leakage rates according to operation of at least one resonance type double-quantum logic gate on a first quantum bit and a second quantum bit in a target system under different coupler frequencies; based on the first corresponding relation, the coupler frequency corresponding to the lowest leakage rate is selected as the target frequency, and the target frequency is the frequency of a control signal applied to the adjustable coupler when the first quantum bit and the second quantum bit execute the resonance type double-quantum logic gate operation. Through the technical scheme provided by the embodiment of the invention, the frequency of the control signal applied to the adjustable coupler during the execution period of the resonance type double-quantum logic gate can be determined, so that an observer error is effectively inhibited, and the fidelity of quantum calculation is improved.

The invention discloses an assembling method of a semiconductor heating plate and a semiconductor process chamber. The assembling method comprises the following steps: adjusting a radial gap between a bearing and a guide shaft to a preset value; raising the semiconductor heating disc; and after the wafer base is in contact with the substrate, the bearing disc can compensate the inclination angle between the bearing and the guide shaft, so that the wafer base and the substrate form circumferential sealing. Therefore, according to the assembling method of the semiconductor heating disc provided by the invention, the bearing disc can continuously adapt to and compensate the inclination angle between the bearing and the guide shaft through the elastic force in the lifting process after the wafer base is in contact with the substrate, so that the sealing of the wafer base and the substrate can be realized. The dynamic adjustment mechanism enables the gap between the wafer base and the substrate to become smaller and smaller when the contact surface of the wafer base and the substrate becomes larger and larger, thereby facilitating the realization of circumferential sealing of the wafer base and the substrate, and further improving the leakage rate of the inner cavity and the outer cavity.

The invention relates to a preparation method of a single-sided packaged diamond microwave window for a frequency band of 300-600GHz. The preparation method is specifically implemented according to the following steps: step 1, carrying out plasma cleaning on a diamond single crystal wafer; step 2, activating a welding area; step 3, performing functional vacuum micro-evaporation plating on a bonding film in a welding area; step 4, assembling the active solder; and step 5, vacuum packaging and whole window laser welding are carried out. The invention also discloses a microwave window prepared by the preparation method of the single-sided packaging diamond microwave window for the frequency band of 300-600GHz. The window electric vacuum device which is high in transmission performance, low in vacuum leakage rate and capable of meeting the high-power microwave transmission requirement is obtained, and effective control over the quality of the device is achieved by adjusting the coarsening activation degree of the non-waveguide area, the structure and material of the sealing and welding area of the diamond single crystal wafer, sealing and welding process parameters and the like.

This invention discloses an online air leakage detection method and system for a sintering system, comprising the following steps: obtaining the exhaust volume flow rate, exhaust gas pressure, exhaust gas temperature, and gas concentration of the target gas in the exhaust gas branch pipe on the first side of the exhaust gas box section i; obtaining the exhaust volume flow rate, exhaust gas pressure, exhaust gas temperature, and gas concentration of the target gas in the exhaust gas branch pipe on the second side of the exhaust gas box section i; marking the gas discharged from the lower end of the grate at the bottom of the sintering trolley corresponding to the exhaust gas box section i as the actual effective intake air, and obtaining the gas concentration of the target gas in the actual effective intake air; and calculating the air leakage rate K of the exhaust gas box section i using a formula. i The online air leakage detection method for the sintering system of the present invention enables online determination of the air leakage rate of the wind box section i.

The invention discloses an automatic leak detection device for tubular workpieces and valves, which comprises a detection table, a plurality of detection stations are arranged on the detection table and used for placing and detecting workpieces, the workpieces are transversely arranged and penetrate through the detection stations, a plurality of valves are arranged on the workpieces, and the detection stations are in one-to-one correspondence with the valves. According to the invention, through the design of the detection method, the detection efficiency is improved, the helium usage amount is reduced through accurate control, through the design of a leakage point search program, the leakage point search and leakage elimination efficiency is improved, the design of an automatic helium spraying mechanism realizes the full coverage of the valve detection point, and through the design of the leakage detection cavity, the air at the detection part is rapidly discharged. The helium concentration can rapidly meet the detection requirement, the detection nozzle realizes accurate helium injection at a fixed position, the helium consumption is reduced, through the design of the device, the leakage rate automatic detection of the pipe type workpiece and the valve with the complex shape is realized, the manual work is replaced to complete the large-batch repeated operation, and the detection efficiency and the detection reliability are improved.

The invention relates to a gas leakage rate determination method and device, electronic equipment and a storage medium, relates to the technical field of gas leakage detection, is used for improving the accuracy of the gas leakage rate, and comprises the following steps: determining gas concentration distribution and gas flow velocity field distribution of a to-be-detected area; determining the gas leakage rate of the to-be-detected area according to the gas concentration distribution and the gas flow velocity field distribution; the gas leakage rate is used for indicating the total amount of gas released by the to-be-detected area in unit time.

This invention discloses a method, system, electronic device, and storage medium for measuring hydrogen leakage rate, relating to the field of hydrogen safety utilization technology. The method includes: calculating the acoustic signal and signal phase difference corresponding to the target device based on an ultrasonic sensor array; obtaining a predicted nozzle aperture based on the acoustic signal, signal phase difference, and a first conversion model determined by a deep learning algorithm; obtaining a predicted gas pressure based on the acoustic signal, signal phase difference, and a second conversion model determined by a deep learning algorithm; and calculating the hydrogen leakage rate at the leak point of the target device based on the predicted nozzle aperture and gas pressure. This invention can accurately predict the hydrogen leakage rate, thus laying the foundation for predicting the amount of hydrogen leakage and the timing of early warnings.

The application discloses a silicon dioxide deposition coating process of a vertical LPCVD device, and comprises the following steps: S1, checking whether the process pipe leaks; S2, blowing the process pipe with nitrogen gas under low pressure; S3, after the leakage rate detection is qualified, nitrogen gas is blown into the gas path pipeline, so that the pressure and the gas flow of the process pipe are stabilized under the pressure and the gas flow conditions set during film deposition; S4, under the set pressure condition, a reaction gas source is introduced, and a silicon dioxide film is deposited on the surface of a semiconductor substrate; and S5, after the silicon dioxide film deposition is completed, nitrogen gas is blown into the process pipe and the exhaust pipeline, nitrogen gas is introduced to increase the pressure to normal pressure, and the boat is discharged. The application has the advantages of simple operation, good stability, high film uniformity and the like, solves the problems of poor film thickness uniformity, high process granularity, poor repeat stability and extremely harsh requirements on process pressure of the existing LPCVD when depositing a SiO2 film, and realizes high-quality wafer coating.

This invention relates to the field of CFRP leakage detection technology, specifically to an in-situ CFRP leakage rate testing system under extreme thermo-coupling environments. The system comprises an extreme temperature environment simulation and mechanical loading subsystem, consisting of an environmental chamber and a mechanical loading unit; an in-situ helium mass spectrometry leakage detection subsystem, used to construct an independent helium chamber on one side of the sample; a molecular pump and a backing pump connected via stainless steel tubing on the other side of the sample; leakage detection using a helium mass spectrometer leak detector; and a multi-channel synchronous data acquisition and control subsystem, used for unified triggering of acquisition channels and software time correction; and for controlling environmental temperature, strain loading, real-time acquisition of leakage signals, and unified timeline display of multi-channel data. This invention improves the realism of environmental simulation, the continuity of detection, and the integrity of data correlation in CFRP leakage detection.

The invention belongs to the field of control of vacuum hole plugging machines, and relates to a filling control method and system of an integrated vacuum hole plugging machine. The method comprises the following steps of: partitioning based on a hole site density distribution diagram of the circuit board, setting an independent prediction and control time domain for each region, and constructing a state vector comprising a predicted filling volume, a slurry flow resistance coefficient and a vacuum chamber leakage rate; in the control process, multiple sets of scraper pressure and speed alternative control sequences are generated through a kinetic model, the filling volume deviation, the overflow risk and the control vector variable quantity of all the sequences in a prediction time domain are evaluated through a weighting function, and therefore a quadratic type performance index function is constructed; and solving a quadratic performance index function to obtain an optimal control sequence and execute a first instruction, and updating a state vector by adopting a double-cycle mechanism to complete closed-loop control. According to the method, the problems of cavities and overflow caused by non-uniform hole position density are solved, and the consistency and stability of hole plugging quality are ensured.

The invention discloses a heterogeneous wafer bonding method and device based on doped and amorphous transition layers, relates to the technical field of semiconductor manufacturing, and aims to solve the problems of low heat conductivity and electric leakage of a heterogeneous wafer interface caused by a bonding process in the prior art. The method comprises the following steps: providing a first wafer and a second wafer with different thermal conductivities, and firstly cleaning the surfaces of the first wafer and the second wafer; respectively forming a wafer doping layer and / or an amorphous transition layer on the cleaned first wafer and second wafer to obtain a first target wafer and a second target wafer; and finally, performing contact bonding on the first target wafer and the second target wafer to obtain a target heterogeneous wafer. The heat conductivity of the bonding interface is improved while the electric leakage rate of the heterogeneous wafer bonding interface is reduced.

The application provides a fire simulation result determination method, a related method, a device, equipment and application. The fire simulation result determination method comprises the following steps: determining at least one leakage type of each leakage unit according to the leakage aperture of each leakage unit, and a preset corresponding relationship between the leakage aperture and the leakage type; determining the immediate ignition probability of each leakage type, and calculating the fire occurrence frequency according to the obtained material properties, leakage rate and release amount of each leakage unit, and the corresponding relationship between the properties of each combustible substance, the leakage rate and release amount of each leakage unit and the preset leakage type in a preset database; establishing a three-dimensional fire simulation model; determining the fire type of each leakage unit; inputting the influence parameters corresponding to each fire type of each leakage unit into the preset three-dimensional fire simulation model to obtain the fire simulation result of each leakage type of each leakage unit. The quantitative data of the fire simulation consequence is more accurate.