32results about How to "Reduce casualties" patented technology

The invention relates to the technical field of slope disaster monitoring, in particular to a high and steep slope geological disaster monitoring method and system based on multi-source data fusion. The method comprises the following steps: tracking surface deformation through PS-InSAR time sequence analysis and atmospheric phase correction to obtain surface deformation characteristics; identifying the apparent diseases of the slope, and extracting spatial and temporal distribution characteristics of the apparent diseases of the slope; analyzing spatio-temporal evolution characteristics under geologic structure constraints by utilizing slope rock mass structure characteristics and the earth surface deformation characteristics; according to underground water level dynamic and potential sliding surface weakening features and the slope apparent disease spatial and temporal distribution features, extracting disaster-causing key factor features after cooperative correction; and combining the disaster-causing key factor characteristics, the true three-dimensional geological environment background characteristics and the spatio-temporal evolution characteristics to analyze the comprehensive early warning grade and the potential instability mode of the landslide. Scientific support is provided for high and steep slope geological disaster prevention and control, and engineering construction and operation safety can be guaranteed.

The invention discloses a gas cut overflow prediction method and system, electronic equipment and a storage medium, and relates to the technical field of drilling safety guarantee, and the method comprises the steps: determining a plurality of target factors from a plurality of factors related to gas cut overflow, the correlation degree between each target factor and the gas cut overflow quantity is higher than the correlation degree between each factor except the target factor and the gas cut overflow quantity; constructing a data set according to all the target factors, and training a preset network model in combination with a multivariate universe optimization algorithm to obtain a gas cut overflow prediction model; and predicting the gas cut overflow by using the gas cut overflow prediction model. According to the invention, the multi-objective optimization algorithm is applied to parameter optimization of the preset network model, the global search capability of the multi-objective optimization algorithm, the automatically adjusted parameters of the preset network model and the trained gas cut overflow prediction model can be fully utilized to predict the gas cut overflow, and the prediction accuracy of the gas cut overflow can be improved.

This utility model discloses an L-shaped flood control wall structure, relating to the field of flood control wall technology. The utility model includes a main frame mechanism, which includes a first flood control plate. A second flood control plate is rotatably connected to the back of the first flood control plate via a pin. The utility model employs an unfolding assembly. Specifically, pulling or twisting causes a limiting rod to disengage from the limiting hole. Simultaneously, when the limiting rod moves, it causes the limiting plate to compress a third spring. The third spring, constrained by the inner wall of the second supporting sleeve, contracts and stores force. When the limiting rod disengages from the limiting hole, both the second and first springs generate a certain rebound force, causing the connecting rod and slider to reset. At this point, the second and first flood control plates are at a 90-degree angle. The equipment can be quickly unfolded to promptly block floodwater, buying valuable time for subsequent rescue work and minimizing casualties and property damage. Furthermore, it is foldable for storage, occupying little space and facilitating transportation and storage.

The utility model belongs to the field of mine safety, and particularly relates to an anti-falling supporting frame for underground work. According to the technology, a steel wire mesh is included, a plurality of mounting columns are arranged below the steel wire mesh, and the upper end of each mounting column is provided with a driving mechanism used for abutting the steel wire mesh against the top of a mine; the driving mechanism comprises a mounting block, the bottom of the mounting block is connected with the mounting column through a hydraulic cylinder, a supporting plate in vertical sliding fit with the mounting block is arranged above the mounting block, the steel wire mesh is fixed to the top of the supporting plate through a connecting assembly, and a detecting assembly used for detecting supporting force is mounted between the supporting plate and the mounting block. And a gas concentration detector and an audible and visual alarm are mounted on the mounting block. According to the utility model, the steel wire mesh is supported on the mine roof through the driving mechanism, and roof caving accidents can be prevented and eliminated in advance from two aspects of detecting the change of supporting force and the change of gas concentration, so that economic loss and casualties are reduced.

The utility model discloses a human settlement environment slope collapse early warning supporting device which comprises a plurality of supporting columns and a plurality of collapse protection plates installed on one sides of the supporting columns, and supporting mechanisms are installed on the other sides of the supporting columns and used for supporting and reinforcing slope protection positions. According to the utility model, through the cooperative work of the inclination sensor, the displacement sensor and the stress sensor, the slope deformation displacement, inclination and stress change conditions can be accurately monitored in real time. Abnormal data can be captured in time at the early stage of collapse risk of the side slope, and an early warning signal is sent out quickly when abnormal deformation occurs. Therefore, precious emergency treatment time is won for residents and related personnel around the human settlement environment, preparation work such as personnel evacuation and property transfer is made in advance, casualties and property losses possibly caused by slope collapse in the human settlement environment are effectively reduced, and the safety of the human settlement environment is guaranteed to the maximum extent.

This utility model discloses a processing device for producing oil pipes for automotive parts, relating to the field of automotive parts processing technology. It includes an operating table, with an adjusting telescopic rod fixedly connected to one side of the operating table's interior. The adjusting telescopic rod is fixedly connected to a fixing component, which is slidably connected to the operating table. A limiting frame is fixedly connected to the side of the operating table away from the fixing component. A feeding component is rotatably connected to the limiting frame, and a cutting component is fixedly connected below the feeding component. A cooling nozzle is fixedly connected to one side of the feeding component, and the cooling nozzle is connected to a collection box via a connecting pipe. The collection box is fixedly connected below the operating table. A filter screen is disposed below the limiting frame and fixedly connected to the operating table. A cleaning component is slidably connected to the filter screen. This utility model offers high processing precision. Through the cooperation of the fixing component and the cutting component, stability during cutting is ensured, guaranteeing processing accuracy.

The application discloses a geological loosening detection early warning device applied to the geological detection field, which is installed in a crack of the geological body to be monitored and extends up and down along the geological surface, and longitudinally spans multiple cracks. When the geological body deforms and moves, the sliding part drives the corresponding position of the embedded nails or the embedded cylinder to jointly move downward, and the cross-crack rope is pulled. When the geological deformation reaches a moving degree, the cross-crack rope is separated from the embedded cylinder, the upper missing disc or the lower missing disc which loses the limitation automatically rotates under the action of the magnetic force until the upper missing disc and the lower missing disc are aligned at the gap, the light of the laser lamp smoothly passes through the pair of gaps and is emitted to the air, a timely and effective long-distance light warning effect is given to the monitoring personnel, the monitoring personnel can timely prevent the geological body with disaster precursors, and personnel casualty is effectively reduced.

This invention relates to the technical fields of tunnel safety control, intelligent transportation, vehicle-road cooperation, and tunnel safety early warning. Specifically, it relates to a tunnel active safety control system and method based on vehicle-road cooperation. Key technical points include: a multi-source data fusion module: integrating data from roadside equipment (including radar, cameras, and fiber optic sensors) and vehicle-mounted terminals to construct a four-dimensional perception network of people, vehicles, roads, and the environment; a dynamic risk assessment module: quantifying the probability of an accident (P) and collision energy loss (E) based on an equivalent traffic conflict number (ECN) model to achieve risk-level early warning; and a vehicle-road cooperative intervention module: triggering early warning and control strategies from both the roadside and vehicle perspectives through two-way communication between roadside smart guidance signs, information boards, and vehicle-mounted terminals. This invention improves the ability to respond to tunnel risks.

The application discloses a meteorological disaster early warning and calling method and system. The calling method generates early warning information by acquiring and processing meteorological monitoring data, matches the corresponding calling objects of the risk area and generates a calling object list, determines and dynamically adjusts the total time limit of calling according to the disaster grade, and generates a calling instruction. The calling instruction is executed to send the calling information and record the sending state, receive and analyze the feedback information to obtain the feedback result containing the positive feedback state set and other states. Based on the sending state and the feedback result, the retry object is screened, the retry calling instruction is generated and executed in a cycle until the preset closed-loop condition is met, and the calling closed-loop record is generated. The application also discloses a corresponding system for implementing the above method, which can effectively improve the accuracy and response efficiency of meteorological disaster early warning and calling, realize the whole-process traceable closed-loop management and control, adapt to the dynamic change characteristics of extreme meteorological disasters, and maximize the reduction of disaster risk.

The utility model provides a kind of rope slackening or broken rope protection device of stacking machine, comprising: vertical frame, trigger assembly, be set on the vertical frame, and be used for connecting steel wire rope, the trigger assembly includes trigger rod;Safety tongs, be set on the vertical frame, the safety tongs are used to clamp or loosen guide rail;Pulling assembly, along first direction slidingly set on the vertical frame, the pulling assembly is connected with the safety tongs;Brake cable, one end of the brake cable is connected the trigger rod, other end is connected the pulling assembly, the trigger rod can tighten or loosen the brake cable.The utility model embodiment identifies fault and intervention quickly, reduce downtime, reduce braking time, improve the security of stacking machine.

The invention relates to the technical field of geological disaster emergency, and discloses a geological disaster emergency evacuation path intelligent planning system based on edge calculation. The system comprises a terrain monitoring layer, a risk assessment layer, a path deduction layer and an evacuation control layer. The terrain monitoring layer collects a multi-dimensional terrain data flow of a disaster area in real time through an edge computing node; the risk assessment layer fuses the historical catastrophe model and the multi-dimensional topographic data flow to carry out geological stability calculation, and generates a dynamic risk distribution map; the path deduction layer generates an initial evacuation path network through a self-adaptive optimization algorithm in combination with the dynamic risk distribution map and a preset evacuation constraint condition; and the evacuation control layer converts the initial evacuation path network into a navigation instruction set and drives terminal execution equipment to implement evacuation guidance. According to the system, the terrain change of a disaster area can be mastered in real time, the risk is accurately evaluated, an evacuation path fitting the reality is generated, personnel evacuation is effectively guided, and the efficiency and safety of emergency evacuation of geological disasters are improved.

The utility model relates to an installation lifting appliance for inverter, include: support mechanism, it includes: first fixed part, second fixed part and base, first fixed part and second fixed part enclose and form first frame body, the base detachably set up in first frame body, the base is equipped with the clamping groove of adaptation to the column body of waiting for installation, hoist mechanism, it includes: second frame body, sling, and drive part, second frame body sets up in first frame body, one end of sling is hinged in second frame body, drive part sets up in second frame body and output end is connected with sling. The utility model discloses above -mentioned setting, need not manual direct contact high altitude heavy object, reduce the risk of being smashed of personnel, significantly reduce the risk of personnel casualty and equipment loss in the operation and maintenance stage.

This utility model discloses an integrated emergency lighting device capable of real-time detection of human body location. The device includes an emergency lighting fixture body, which integrates a millimeter-wave radar sensing module, a thermal imaging sensor, a voice recognition module, a CO gas sensor, a PLC control module, a drive unit, and an audible alarm. The millimeter-wave radar sensing module, thermal imaging sensor, voice recognition module, CO gas sensor, drive unit, and audible alarm are all electrically connected to the PLC control module. The emergency lighting fixture body has two evacuation lights, each electrically connected to the PLC control module via a drive unit, forming independent working circuits that do not interfere with each other. This utility model can promptly monitor and locate the position of trapped personnel, providing firefighters with accurate rescue information, improving rescue precision, avoiding blind searches, shortening rescue time, and reducing casualties and property damage.

The application provides a coal mine fire disaster avoidance route planning method and device, and relates to the technical field of coal disaster prevention.The application takes each region pre-set in a coal mine as a node, takes the roadway between the regions as an arc segment between the corresponding nodes, and obtains the weight corresponding to each arc segment to generate an undirected graph network, obtains the node corresponding to the dangerous region where the coal mine staff is currently located as a starting node, obtains the node corresponding to any region in a safe state at the current time as a terminal node, obtains the optimal path from the starting node to the terminal node based on the improved ant colony algorithm, and takes the shortest path as the planning path.The application realizes accurate and reliable path planning, improves the safety of the coal mine workers, helps them quickly find the best escape path in an emergency, and reduces the casualties and losses in accidents.

This utility model relates to the field of brick manufacturing and discloses a multi-layer concrete brick transfer vehicle, including a transfer mother car and a transfer daughter car. The transfer mother car includes a mother car frame, a mother car power system is installed at the bottom of the mother car frame, and an emergency braking system is installed on the forward side of the transfer mother car. A mother car upper rail is provided at the place where the transfer daughter car is placed on the transfer mother car, and a daughter car limiting mechanism is provided below the mother car upper rail. The transfer daughter car includes a daughter car frame, a daughter car power system is installed below the daughter car frame, and a multi-layer forklift arm system is installed above the daughter car frame. This utility model ensures that the transfer daughter car cannot separate from the mother car if the rail is not properly aligned, reducing the risk of derailment. At the same time, the transfer mother car has an emergency braking system, which can brake suddenly in the event of a collision to reduce casualties.

The utility model discloses a new energy battery pack collision protection structure, which belongs to the technical field of new energy batteries, and comprises an assembly seat and an anti-collision plate, the assembly seat is provided with four fixing rings, the upper surface of the anti-collision plate is vertically provided with four vertical rods, the outer surface of each vertical rod is matched with a first spring, and the outer surface of each first spring is matched with a second spring. The outer surface of the top end of the vertical rod is matched with the inner ring of the fixing ring, an arc-shaped energy absorption plate is arranged on the lower surface of the anti-collision plate, and a honeycomb structure is arranged in the arc-shaped energy absorption plate. The problem that it is difficult to effectively buffer and weaken impact force is solved.

The present application belongs to the technical field of geological disaster monitoring, and discloses a debris flow velocity inversion method based on an optical flow model, and proposes an integrated optical flow framework for simultaneously inverting the surface velocity field and the front velocity of the debris flow. Through three sets of large-scale flume experiments, the method provides a robust and accurate tool for characterizing complex flow kinematics. By simultaneously measuring the surface velocity field and the front velocity, the main limitations of existing computer vision techniques are overcome, and a more comprehensive understanding of the flow process is achieved. The core scientific contribution lies in the new physical insights obtained through synchronous measurement: the research results provide direct and strong observational evidence, which links the high-frequency velocity pulses at the front to the secondary surge dynamics propagating from the tail. This discovery is crucial for understanding internal momentum transfer and energy dissipation. At the methodological level, the framework is superior to the benchmark deep learning tracker in terms of reproducing flow velocity statistical characteristics and ensuring numerical accuracy.

The application discloses a hydrological and hydrodynamic coupling alpine mountain flood simulation and prediction method, and belongs to the technical field of disaster prediction. The method specifically comprises the following steps: S1, multi-source basic data collection and preprocessing: for the target alpine mountain basin, collect multi-type and multi-scale basic data; S2, deep learning correction and fusion of satellite precipitation data: for the local overestimation and underestimation problems of satellite precipitation data, a deep learning algorithm is used for hour-scale correction and fusion. By collecting satellite remote sensing, reanalysis, ground observation and geographic space four kinds of core data, covering all factors of 'precipitation-runoff-terrain-underlying surface' required for alpine mountain flood simulation, avoiding the one-sidedness of traditional modeling caused by the lack of data types, using 3 sigma criterion to remove precipitation and runoff outliers, unifying data format and space-time scale, forming a standardized data set, avoiding the interference of abnormal values, incompatible format and space-time mismatch on subsequent model input.

The present application relates to the technical field of dangerous goods diffusion prediction, and particularly relates to a dangerous chemical product loading and unloading leakage diffusion area intelligent prediction method and system, comprising the following steps: processing dangerous goods diffusion data in a dangerous goods leakage diffusion database, and dividing the dangerous goods diffusion data into a training set for training of a multi-channel convolutional neural network and a test set for testing of the multi-channel convolutional neural network; training and testing the multi-channel convolutional neural network based on the training set and the test set, to obtain a dangerous goods loading and unloading leakage diffusion prediction model for predicting a dangerous goods diffusion range; and using preset evaluation indexes to evaluate the diffusion range prediction performance of the dangerous goods loading and unloading leakage diffusion prediction model. The present application uses a multi-channel convolutional neural network model to intelligently predict dangerous goods leakage, and uses a network search method to optimize hyperparameters, so as to achieve the purpose of reasonably dividing dangerous areas, thereby effectively carrying out emergency and rescue activities, reducing personnel casualties, and reducing property losses.

The application belongs to the technical field of ship equipment, and discloses a ship intelligent towing umbrella and a use method thereof. A front edge folding umbrella mechanism (9) is arranged in a front edge device (2), a rear edge folding umbrella mechanism (10) is arranged in a rear edge device (6), an umbrella surface (11) is arranged at the lower part of the front edge device (2) and the rear edge device (6), one end of the umbrella surface (11) is connected with the front edge folding umbrella mechanism (9), the other end of the umbrella surface (11) is connected with the rear edge folding umbrella mechanism (10), an engine (17) is arranged on the side of the umbrella body, the engine is connected with a rotating mechanism (19), and a photoelectric reconnaissance device (24) is arranged on the umbrella body. The ship intelligent towing umbrella and the use method thereof can realize long-term suspension in the air by using wind power or an aero-engine or a ship towing force, the umbrella and the attached load are lifted to a suitable height by the aero-engine, manpower is saved, the anti-gust wind capability is improved, and the rapid reconnaissance requirement is met.

The application discloses a data processing method and device for assisting decision-making of maritime search and rescue, and the method comprises the following steps: acquiring to-be-processed case information and historical case data sets; preprocessing the to-be-processed case information and the historical case data sets to obtain preprocessed case information and preprocessed historical case data sets; and processing the preprocessed case information and the preprocessed historical case data sets to obtain a target case information set. It can be seen that, by using the multi-dimensional attribute similarity calculation method, the most similar historical search and rescue experience to the current case can be accurately identified, the most optimal matching case considering five types of attributes, i.e., time, space, value, enumeration and text, is obtained, the maritime sudden accident can be quickly responded and accurately decided, the search and rescue efficiency is improved, the risk is reduced, the personnel casualty and property loss are reduced, and intelligent and professional technical support is provided for the maritime search and rescue work.

The application provides a method for evaluating the insulation performance of organic composite solid insulation material. The application researches and finds that the porosity and electrical strength of the organic composite solid insulation material satisfy the following relation: Y = - [(M / 100000*2.52) + 0.005]X + (19 + 2); wherein Y is the electrical strength, X is the porosity, and M is the number average molecular weight of the polymer matrix. The evaluation method of the application starts from the organic composite solid insulation material, tests the porosity and electrical performance of the organic composite solid insulation material, and establishes a correlation between the porosity and the insulation performance of the organic composite solid insulation material. Using the evaluation method, on one hand, the insulation performance of the organic composite solid insulation material can be simply and quickly evaluated; on the other hand, the occurrence of unqualified electric appliance products can be reduced from the root, thereby reducing the cost and reducing the personnel casualty.

The invention provides a complex mountainous area landslide rapid identification method and system based on multi-source data, and relates to the technical field of complex mountainous area landslide rapid identification, through a deep mining and attention weight fusion algorithm, the influence weight of each reference key influence attribute is calculated, the weight directly represents the confidence coefficient of the attribute, and the confidence coefficient of each reference key influence attribute is calculated. And screening out core attributes which have obvious influence on the landslide. And on the basis of the effective reference key influence attributes and the corresponding influence weights, target key influence attribute description content is generated through multi-analysis-unit cooperative processing and iterative optimization, and then the landslide risk probability is accurately calculated. A data basis is constructed through comparison of double landslide cases, the weight calculation accuracy is improved in combination with multi-source data association analysis, key attribute description is perfected with the help of an iterative optimization mechanism, the precision and efficiency of complex mountain landslide recognition are improved, and a scientific and reliable decision basis can be provided for early warning and prevention and control of landslide disasters.

The utility model provides a building electrical engineering installation alarm device, which belongs to the technical field of building fire alarm and comprises a smoke alarm, a fixing sleeve is movably clamped on the outer surface of the smoke alarm, and a liquefied gas alarm is fixedly connected on the circumferential surface of the fixing sleeve. The top end of the liquefied gas alarm is fixedly connected with a connecting plate; the liquefied gas alarm is arranged and has the capacity of accurately detecting liquefied gas leakage, when it is detected that the liquefied gas concentration exceeds the safety range, an alarm can be given immediately, serious safety accidents such as explosion and poisoning caused by liquefied gas leakage are effectively prevented, the liquefied gas alarm is matched with the smoke alarm, and the safety of the electrical environment of a building is comprehensively improved; and the life and property safety of residents and surrounding areas in the building is guaranteed, which benefits from the arrangement of the liquefied gas alarm and the accurate detection function of the liquefied gas alarm, and the problems existing in the traditional liquefied gas leakage detection alarm equipment are solved.

The application relates to a kind of open public place emergency decision-making method, equipment and medium based on multi-agent, comprising: obtaining the attribute and definition domain of current emergency problem data, historical case data and emergency scheme;Based on emergency knowledge enhancement big model intelligent agent framework, the key attribute set and attribute value vector of current emergency problem are generated by case analysis expert intelligent agent, the similarity of each key attribute with historical case is calculated, and the set of alternative emergency scheme is generated;Through the group decision-making combination weighting of multiple weighting expert intelligent agent, attribute weight vector and emergency cost attention degree value are generated;The comprehensive utility value of each alternative emergency scheme is calculated by decision expert intelligent agent, and the scheme corresponding to the maximum value is selected as the solution.Compared with the prior art, the application has the advantages of high intelligence, strong real-time performance and good reliability.

The utility model discloses a rail transit fire disaster processing device, including a plurality of fire smoke processing spare that sets up in turn along the length direction of subway tunnel, fire smoke processing spare includes the arc shape smoke exhaust duct of subway tunnel top and the plate shape smoke exhaust duct of subway tunnel both side wall, the inboard of arc shape smoke exhaust duct is equipped with a plurality of arc open, two plate shape smoke exhaust ducts are respectively equipped with a plurality of rectangular openings on the side of mutual approach, the top of arc shape smoke exhaust duct is equipped with the smoke exhaust vertical pipe of intercommunication, the inside of smoke exhaust vertical pipe is equipped with smoke exhaust fan. The utility model discloses a fire smoke processing spare's work can deliver the partial smoke of passing to the outside of tunnel, thereby reduces the concentration of harmful smoke in the tunnel to the direction of farther tunnel mouth flow, thereby reduces the amount of passenger inhaling harmful gas that part escapes to the direction of farther tunnel mouth, reduces the personnel casualty.

This invention relates to the field of railway vehicles and provides a full-width evacuation door system, including a door body, a door frame, a ladder, a first elastic element, a second elastic element, and a locking element. The door body is hinged to the top of the door frame, and the ladder is hinged to the bottom plate of the door frame. The first elastic element is installed between the door body and the ladder. When the door body is locked, the first elastic element restricts the position of the ladder; when unlocked, it pushes the door body to rotate outward. The second elastic element is installed between the ladder and the bottom plate to drive the ladder to rotate outward. When the door body is locked, the elastic force of the first elastic element is greater than that of the second elastic element; when the door body is open, the elastic force of the first elastic element is less than that of the second elastic element. This invention achieves synchronous and rapid automatic deployment of the ladder along with the door body through the linkage of the two elastic elements, requiring no additional power and significantly improving emergency evacuation efficiency and safety.

This invention discloses an emergency escape window, comprising: a window body, the main frame of which is made of reinforced steel or special alloy material and equipped with a multi-layer composite glass panel; a folding airbag, integrated and stored in the lower or side frame of the window body, made of high-strength, flame-retardant, and tear-resistant composite plastic, the airbag being highly compressed when not deployed, and designed as a slide with protective sidewalls; and a window-breaking ejection button located on the surface of the window body. This emergency escape window, by combining robust explosion-proof performance with a second-level response escape route, provides users with an independent, reliable, and rapid lifeline in emergencies, greatly improving the survival rate in high-risk environments and effectively reducing casualties. The inflatable slide provides a buffered and guided descent path, avoiding the impact injuries from high-altitude jumps and potential stampedes in chaos.

The invention discloses a TDLAS (Tunable Diode Laser Absorption Spectroscopy) gas detection device with a built-in standard gas chamber and a self-detection method, the device comprises a laser, a to-be-detected gas channel, a laser receiver, a signal processing unit and a fault detection and self-calibration module, the standard gas chamber is arranged in the laser, and standard gas with the fixed concentration of X standard is sealed in the standard gas chamber. During detection, laser sequentially penetrates through the standard gas chamber and the to-be-detected gas channel, the laser receiver converts an optical signal into an electric signal, the signal processing unit calculates the total gas concentration X total based on the TDLAS principle, and detection, fault recognition and self-calibration are achieved by comparing the theoretical relation between X total and X standard and the theoretical relation between X to-be-detected gas concentration X to-be-detected. The device solves the problems that an existing TDLAS device is sensitive in environmental interference and cannot detect sensor failure in real time, has the advantages of being high in measurement precision, low in maintenance cost and high in safety, is widely applied to industrial production, environmental protection monitoring and other scenes, and effectively guarantees the reliability of a detection result and the use safety.

The application discloses a lithium ion battery diaphragm with thermal stability and a preparation method thereof, and belongs to the technical field of lithium battery diaphragms. The method comprises the following steps: polyvinylidene fluoride is stirred and mixed in N-methyl pyrrolidone to obtain a preliminary slurry; boehmite powder is placed in the preliminary slurry, stirred and mixed, and ultrasonic treatment is conducted to obtain a final slurry; the final slurry is scraped and coated onto a glass plate and dried to form a shape; and the dried coating layer is peeled off from the glass plate to obtain the lithium ion battery diaphragm. The application can simply and economically obtain a novel diaphragm for a lithium ion battery and is easy to be mass-produced industrially. The diaphragm has effectively improved thermal stability, can effectively inhibit the thermal runaway risk of a lithium ion battery in the case of fire and the like, and reduces personnel casualties and property losses.