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101 results about "Smoke screen" patented technology
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A smoke screen is smoke released to mask the movement or location of military units such as infantry, tanks, aircraft or ships. Smoke screens are commonly deployed either by a canister (such as a grenade) or generated by a vehicle (such as a tank or a warship).
Optimal putting method of smoke screen jamming bomb in multi-machine joint cooperation scene
The invention provides an optimal throwing method for smoke screen jamming bombs in a multi-machine joint cooperation scene, and belongs to the field of applied mathematics and computational sciences, and the method comprises the following steps: building a missile trajectory equation according to a known enemy missile motion trajectory; constructing a single-machine single-missile shielding model; solving a maximum effective shielding duration putting strategy under a single-machine single-missile model based on a particle swarm algorithm; constructing a multi-machine joint cooperation shielding model; on the basis of a particle swarm algorithm, a genetic algorithm is fused, the maximum effective shielding duration is solved under the condition that the overlapping shielding duration is reduced as much as possible, and an optimal putting strategy is obtained. According to the method, under the constraint conditions of smoke concentration effectiveness, the shortest time interval of unmanned aerial vehicle launching and the like, the overall shielding duration of the multi-smoke-screen cloud cluster can be remarkably prolonged, and optimal configuration and utilization efficiency maximization of shielding resources are achieved.
Owner:NANTONG UNIV
Infrared interference smoke screen applying device
ActiveCN223896695UFog generating apparatusArtificial fog/smoke generationSmoke screenMechanical engineering
The utility model provides an infrared interference smoke screen discharging device which is characterized in that the infrared interference smoke screen discharging device comprises a box body, the box body is divided into an upper material storage cavity and a lower working cavity by a partition plate, a conveying device is arranged at the bottom of the material storage cavity and comprises a material conveying screw rod, and the two ends of the material conveying screw rod are installed on the inner wall of the box body through bearing seats correspondingly; a switch valve and a control device for controlling opening and closing of the switch valve are arranged on the partition plate, a driving device for driving the conveying screw to operate is arranged on the inner wall of the box body, and a power supply module is arranged; a discharging device is installed in the working cavity, a smoke screen releasing opening is formed in a side plate, corresponding to one side of the air outlet direction of the discharging device, of the box body, and an air inlet is formed in a side plate, corresponding to one side of the air inlet direction of the discharging device, of the box body. The material box and the discharging device are combined into a whole, the weight is light, the cost is low, maintenance is convenient, high-speed airflow generated by the ducted fan is used for blowing powder in the working cavity into the air, and then an infrared interference smoke screen is effectively formed.
Owner:ZHONGGUANG DEFENSE TECHNOLOGY (TIANJIN) CO LTD
A flexible barrier apparatus
The application belongs to the technical field of emergency management and control, and specifically discloses a flexible blocking device, which comprises a box body, a smoke forming unit is installed in the box body, and a light curtain belt forming unit is further installed on one side of the box body; the smoke forming unit comprises an air inlet cover, a fan and a smoke flow guide cover which are connected in sequence; the air inlet cover is provided with a smoke storage tank; the smoke flow guide cover comprises an upper flow guide cover and a lower flow guide cover, a flow guide grating surface is arranged on the smoke outlet of the flow guide cover, and the flow guide grating surface comprises a plurality of vertically and spaced flow guide gratings; flow guide columns are arranged in the upper flow guide cover and the lower flow guide cover, and the closed surfaces of the two flow guide columns form smoke outlet annular bands with the inner sides of the upper flow guide cover and the lower flow guide cover respectively; the light curtain belt forming unit comprises a mounting frame, a plurality of aspheric lenses and a plurality of LED light sources, the mounting frame is hollow, and the plurality of aspheric lenses and the plurality of LED light sources are arranged opposite to the two sides of the mounting frame respectively. The application can form a smoke curtain belt with uniform laminar flow, and can form a more eye-catching flexible blocking effect in combination with the light curtain belt.
Owner:中铁交通投资集团有限公司 +1
Low-smoke waterproof pyrotechnic composition and preparation method thereof
The invention discloses a low-smoke waterproof pyrotechnic composition and a preparation method thereof. The low-smoke waterproof pyrotechnic composition is prepared by performing surface treatment on active metal powder by adopting waterproof macromolecules based on a macromolecular fluoride-active metal composition system to form a microcapsule structure, and introducing polyaniline intercalated expanded graphite. Compared with the prior art, the waterproof treatment is carried out on the surface of the active metal powder, so that the waterproof performance of the pyrotechnic composition can be enhanced, the activity of the metal powder can be effectively protected, and the dispersity of particles is improved. Particularly, the polyaniline intercalation expanded graphite introduced in the invention has high porosity, and active groups on the surface of the polyaniline intercalation expanded graphite enable smoke screen particles generated by combustion of the expanded graphite and the pyrotechnic composition to have good cohesiveness, so that the smoke amount of the pyrotechnic composition is reduced. Therefore, the prepared low-smoke waterproof pyrotechnic composition has good application value in the fields of fireworks and crackers and the like.
Owner:LIUYANG QIFANG ENVIRONMENTAL PROTECTION MATERIALS CO LTD
An optimization method and system for smoke grenade deployment based on a view cone occlusion model.
PendingCN122087887Aimprove continuityAchieve precise measurementsGeometric CADMathematical modelsDecision controlDecision model
This invention discloses an optimization method and system for smoke screen chaff deployment based on a view cone masking model, belonging to the field of signal jamming technology. The method includes the following steps: S1, constructing an adversarial kinematic model of the missile, target, and chaff; S2, establishing a view cone masking quantitative evaluation model with masking completeness as the core; S3, defining a fitness function with the maximum effective masking time as the objective; and S4, using an adaptive genetic algorithm to solve for the optimal deployment strategy that satisfies spatiotemporal constraints. This invention solves two major bottlenecks in existing technologies: the disconnect between effect evaluation and decision control, and the excessive reliance of advanced decision models on preset conditions. It achieves accurate, direct, and decision-driven quantitative evaluation of masking effects from the first-person perspective of the missile seeker.
Owner:NANTONG UNIV
A method for scheduling unmanned vehicle group to maximize smoke cover considering terrain constraints
This invention discloses a method for scheduling unmanned vehicle swarms to maximize smokescreen coverage considering terrain constraints, belonging to the field of unmanned vehicle swarm scheduling technology. The method includes collecting raw terrain data of the task area and preprocessing it to obtain a standardized terrain dataset. This standardized terrain dataset is then input into an IMUNet network to achieve accurate terrain modeling of the task area and extract terrain constraints for unmanned vehicle operation. A smokescreen coverage model under terrain constraints is constructed based on these constraints. The total effective smokescreen coverage area of the unmanned vehicles under different parameters is calculated. Using the total effective smokescreen coverage area as the optimization objective and the terrain constraints as the constraints, the QSMODE algorithm is used to solve the unmanned vehicle swarm scheduling optimization model to obtain the optimal unmanned vehicle swarm scheduling scheme. This invention improves the adaptability and robustness of the scheduling method, accurately handles complex terrain scenarios, and ensures maximum smokescreen coverage of the task area.
Owner:BEIHANG UNIV
Hidden type ceiling screen
The utility model belongs to the technical field of indoor decoration, and particularly relates to a hidden type ceiling screen. The suspended ceiling comprises suspended ceiling assemblies, ceiling assemblies arranged below the suspended ceiling assemblies, and vertical wall assemblies which are arranged between the adjacent ceiling assemblies and can ascend and descend. The limiting assemblies can limit the ascending height of the bottom of the vertical wall assembly, and a passing groove allowing the vertical wall assembly to ascend and descend is formed between the limiting assemblies; a containing cavity which is sunken towards the upper portion of the ceiling assembly and used for containing the end of the vertical wall assembly is formed between every two adjacent limiting sets. According to the utility model, through the arrangement of the accommodating cavity, the position of the bottom of the vertical wall during ascending is fixed, so that the smoke-blocking vertical wall can be completely hidden in a ceiling, and meanwhile, the interference between the smoke-blocking vertical wall and the ceiling is reduced when the smoke-blocking vertical wall ascends, so that the operation of the smoke-blocking vertical wall is smoother. The ceiling is simple in structure, convenient to install and high in integrity after being installed, material difference between the vertical wall and the ceiling does not need to be considered, and the ceiling is suitable for popularization and application in practice.
Owner:ZHEJIANG CONSTR ENG GRP CO LTD
Lifting type smoke-blocking vertical wall
The utility model provides a lifting type ceiling screen which comprises a frame, a fixed plate, a movable plate and a telescopic push rod component, the frame comprises a bearing part, a first supporting part and a second supporting part, when the fixed plate is installed on the bearing part, the first supporting part and the second supporting part are located on the two sides of the bearing part, one end of the movable plate is movably arranged in a containing groove of the fixed plate, and the other end of the movable plate is movably arranged in a containing groove of the telescopic push rod component. A through groove is formed in the bottom of the movable plate, a supporting rod is arranged in the through groove, a flow guide plate is rotationally arranged on the supporting rod, and the telescopic push rod component controls the movable plate to enable one end of the movable plate to be close to or away from the bottom end of the fixed plate. Through the mode that the movable plate ascends and descends in the fixed plate, the length of the smoke-blocking vertical wall is adjusted, and the problem that the length of an existing smoke-blocking vertical wall is fixed and cannot be adjusted according to actual conditions is solved.
Owner:FUJIAN YONGJIA FIRE DOOR & WINDOW MFG CO LTD
A gas jet smoke screen device
The application relates to the technical field of camouflage smoke discharging, and discloses a gas-spraying type smoke camouflage device which comprises a storage tank and a smoke spraying pipe, an activity cavity is arranged in the storage tank, a transmission gear wheel is rotationally connected to the inner side wall of the activity cavity, a first driven gear wheel and a second driven gear wheel are also rotationally connected to the inner side wall of the activity cavity, the first driven gear wheel and the second driven gear wheel are connected in mesh with the transmission gear wheel, a first driven rod and a second driven rod are fixedly connected to one end of the first driven gear wheel and the second driven gear wheel respectively, and helical blades are fixedly connected to the surfaces of the first driven rod and the second driven rod. The device can rapidly stir and mix the smoke agent, avoids stratification of the smoke agent, guarantees full combustion of the smoke agent, avoids backflow of the smoke agent, rapidly forms a smoke screen, forms camouflage for a transport vehicle, and guarantees safety of the transport vehicle.
Owner:AIR FORCE UNIV PLA
Crawler-type remote control camouflage protection smoke screen vehicle and working method
The invention discloses a crawler-type remote control camouflage protection smoke screen vehicle and a working method, the crawler-type remote control camouflage protection smoke screen vehicle comprises a chassis, a smoke generating device and a box body, the chassis is a crawler-type mobile vehicle, the smoke generating device and the box body are both arranged on the chassis, and the smoke generating device is arranged in front of the box body; the fuming device is installed on the chassis through a left-right rotating head driving device and an up-down rotating head driving device, a turbojet engine and a spraying pipe are arranged in the fuming device, and the spraying pipe is arranged at the front end of the turbojet engine; a left-right rotating head limiting switch is arranged on the left-right rotating head driving device, and an up-down rotating head limiting switch is arranged on the up-down rotating head driving device; a smoke master control system is arranged in the box body, and the smoke generating device, the moving mechanism, the left-right rotating head driving device and the up-down rotating head driving device are all connected with the smoke master control system. The problems that an existing smoke screen vehicle is low in rapid transfer capacity on complex terrains and cannot rapidly adapt to environmental changes are solved.
Owner:QINGDAO LINGDING TECH
Multispectral photoelectric measurement method and system based on smoke screen interference condition
PendingCN120176844ASpectrum investigationColor/spectral properties measurementsSmoke screenImage enhancement
The invention discloses a multispectral photoelectric measurement method and system based on a smoke screen interference condition, and relates to the technical field of photoelectric measurement, and the method comprises the steps: obtaining a smoke screen type and smoke screen concentration; adjusting a multispectral camera based on the smoke screen type and the smoke screen concentration to obtain a multispectral photoelectric image; constructing a multispectral denoising model based on the generative adversarial network model; performing denoising processing on the multispectral photoelectric image through a multispectral denoising model to obtain a denoised multispectral photoelectric image; performing image enhancement processing on the de-noised multispectral photoelectric image to obtain an enhanced multispectral photoelectric image; and performing target identification on the enhanced multispectral photoelectric image through a target identification algorithm to obtain a multispectral photoelectric measurement result. According to the method, the smoke screen type and the smoke screen concentration are dynamically obtained, and the multispectral camera parameters are adjusted according to the smoke screen type and the smoke screen concentration, so that the reliability and precision of multispectral photoelectric measurement in a complex environment are improved.
Owner:中国人民解放军91404部队第330所
Slitting and bending device for ceiling screen production
The utility model provides a slitting and bending device for producing a smoke barrier vertical wall, which comprises a machine table, a cutting mechanism is arranged on the machine table, the cutting mechanism comprises a module seat and a slitting assembly, a bearing frame is arranged on one side of the machine table, the bearing frame is provided with a hollow part, a plurality of sliding roller parts distributed at intervals are arranged on the hollow part, and a bending assembly is arranged on the bearing frame. The bending assembly comprises a second push rod component and a buffer component which are located on the two sides of the bearing frame, and the vertical wall support needing to be machined penetrates through the module base and extends to the bearing frame, so that the vertical wall support is located between a stamping part connected with the second push rod component and a material abutting plate of the buffer component; the stamping part moves to abut against the vertical wall support and bend the vertical wall support, the abutting plate plays a supporting role, the bearing frame is further provided with the cooling assembly for lubricating the vertical wall support, the vertical wall support is slit through the slitting assembly after bending is completed, and therefore bending and slitting operation on the vertical wall support is completed.
Owner:FUJIAN GUANGSHENG FIRE TECH CO LTD
Hidden mounting structure for ceiling screen
The utility model discloses a ceiling screen hidden type installation structure, and particularly relates to the technical field of ceiling screens, the ceiling screen hidden type installation structure comprises an installation frame, a fireproof plate and a fireproof frame, one side of the fireproof plate and one side of the fireproof frame extend into the installation frame, a U-shaped plate is arranged in the installation frame, one side of the U-shaped plate is fixedly connected with the fireproof plate, and the other side of the U-shaped plate is fixedly connected with the fireproof frame. The front end and the rear end of the U-shaped plate are fixedly connected with rotating shafts, the ends, opposite to each other, of the two rotating shafts are movably connected with the mounting frame through bearings, and a moving assembly is arranged between the fire stopping frame and the U-shaped plate. Smoke can be prevented from diffusing in a building without hindrance through the fireproof plate and the fireproof frame, the stepping motor works to drive the first lead screw to rotate so as to drive the fireproof frame to move horizontally, the distance between the fireproof frame and the U-shaped plate is adjusted according to requirements so that the fireproof plate and the fireproof frame can be hidden and stored conveniently, operation is easy, and practicability is high. And the length of the fireproof plate is convenient to adjust.
Owner:ZHENGZHOU JINKUN DOOR IND CO LTD
Fixed ceiling screen
Owner:SHANGHAI JUNTONG DOOR CO LTD
Vertical lifting type special-shaped ceiling screen
The utility model belongs to the technical field of ceiling screens, and particularly relates to a vertical lifting type special-shaped ceiling screen which comprises a mounting frame, a movable bottom plate is arranged at the bottom of the mounting frame, a folding and unfolding mechanism is arranged between the interior of the mounting frame and the top end of the movable bottom plate, and an L-shaped plate is fixedly connected to the bottom end of the movable bottom plate. A telescopic auxiliary mechanism is arranged between the top end of the L-shaped plate and the rear end of the mounting frame, and a plurality of scrap vibration auxiliary mechanisms are arranged in the telescopic auxiliary mechanism. The telescopic auxiliary mechanism and the scrap vibration auxiliary mechanism can drive a plurality of pairs of movable protruding rods to repeatedly make contact with and collide with the inner walls of the movable protruding rods in the telescopic process of the second frame body, the third frame body, the fourth frame body and the movable straight plate, vibration is generated and conducted to fireproof rolling cloth, and the fireproof rolling cloth is wound. Therefore, particles attached to the surface of the fireproof rolling cloth can be vibrated off under the vibration effect, the fireproof rolling cloth is not prone to being abraded due to extrusion and friction of the particles during rolling, and therefore the effects of being convenient to clean and long in service life are achieved.
Owner:XIANNING YOUNING FIREPROOF DOORS & WINDOWS CO LTD
Flexible blocking equipment
The invention belongs to the technical field of emergency management and control, and particularly discloses flexible blocking equipment which comprises a box body, a smoke forming unit is installed in the box body, and a light curtain belt forming unit is further installed on one side of the box body. The smoke forming unit comprises an air inlet cover, a fan and a smoke guide cover which are connected in sequence; a smoke storage tank is arranged in the air inlet cover; the smoke guide cover comprises an upper guide cover and a lower guide cover, a guide grid surface is arranged on the guide smoke outlet, and the guide grid surface comprises a plurality of guide grids which are vertically arranged at intervals; flow guide columns are arranged in the upper flow guide cover and the lower flow guide cover, and the closed surfaces of the two flow guide columns and the inner sides of the upper flow guide cover and the lower flow guide cover form a smoke outlet ring belt respectively; the light curtain belt forming unit comprises a mounting frame, a plurality of aspherical lenses and a plurality of LED light sources, the mounting frame is hollow, and the aspherical lenses and the LED light sources are arranged on the two sides of the mounting frame in a right-facing mode respectively. The smoke screen belt with uniform laminar flow can be formed, and a more striking flexible blocking effect is formed by combining the smoke screen belt with the light screen belt.
Owner:中铁交通投资集团有限公司 +1
A smoking device employing a two-stage cyclone air atomizing nozzle
The utility model provides a kind of smoke generator using two-stage cyclone air atomization nozzle, belong to smoke generator technical field, the smoke generator includes micro turbojet engine nozzle and is arranged at the smoke nozzle of micro turbojet engine nozzle export side, the inside of smoke nozzle is provided with atomizing device, the outlet of atomizing device and the outlet of smoke nozzle are set same direction;When working, micro turbojet engine is used as smoke power source, high temperature high pressure high-speed airflow generated from micro turbojet engine turbine export flows out from micro turbojet engine nozzle and enters from smoke nozzle import, smoke agent enters atomizing device, atomizing device is fully atomized after smoke agent and is discharged into smoke nozzle, and after atomization, smoke agent and airflow are fully mixed and are discharged from smoke nozzle outlet, and large-scale smoke screen is formed in short time, solve the problem that existing high-power smoke generator directly forms smoke screen due to smoke agent not passing through atomization, reduce smoke effect, cause smoke agent waste.
Owner:LUZHOU MAOWEI TECH CO LTD
Unmanned aerial vehicle cluster cooperative smoke dispatching method for maximizing smoke coverage
ActiveCN122111084AInternal combustion piston enginesNavigational calculation instrumentsSimulationUncrewed vehicle
The present application provides a kind of unmanned aerial vehicle cluster cooperative smoke dispatching method for maximizing smoke coverage, solve the technical problems of low smoke diffusion prediction accuracy, poor unmanned aerial vehicle cluster cooperation, weak dynamic adaptability of scheduling strategy and difficult to maximize coverage in existing method.The present application includes the following steps: step 1, collect real-time operation data and environment data of smoke unmanned aerial vehicle and pretreat;Step 2, improve ReTUNet model, define the improved ReTUNet model as IReTUNet model, predict smoke diffusion state using IReTUNet model, output smoke concentration distribution matrix, calculate smoke coverage based on the matrix and identify coverage blind area;Step 3, improve IA * algorithm, optimize its heuristic function;Through the improved IA * algorithm, the optimal scheduling strategy is output, which guides the unmanned aerial vehicle to execute the smoke task.
Owner:TIANMUSHAN LABORATORY
A dynamic screening method and system for unmanned aerial vehicle smoke screen jamming projectiles
The application relates to the field of unmanned aerial vehicle confrontation, and discloses a dynamic shielding launching method and system of an unmanned aerial vehicle smoke screen jamming bomb, which comprises the following steps: three-dimensional situation analysis is performed on the terrain undulation, meteorological shear layer, radar and photoelectric reconnaissance source distribution in a task airspace, a threat accessibility density field is generated, and a mobile sensitive section is divided; a back-stepping calculation is performed on the current flight attitude, heading bias and power margin of the unmanned aerial vehicle, a shielding and flight path superposition control parameter set is formed; trial calculation is performed on each launching time and release height, an overlapping interval of smoke screen formation and line-of-sight blocking is determined, and a continuous misleading candidate launching node is formed; the node is mapped to a preset avoidance route library, geometric deviation and time dislocation between a real avoidance route and a virtual induced flight path are compared, and a complete mobile instruction chain is formed; and according to the mobile instruction chain, real-time wind field return data and target tracking beam steering trend, a cooperative avoidance execution instruction is output. The application has the advantage of improving shielding continuity.
Owner:JIANGSU UNIV OF SCI & TECH
Smoke screen type laser beam line sweeping warning device
The invention discloses a smoke screen type laser beam line sweeping warning device which comprises a laser generating assembly and a smoke screen generating assembly, the laser generating assembly is installed on a tower on one side of a road, and the smoke screen generating assembly is installed on a tower on the other side of the road; the laser generation assembly comprises a laser generation device and a first solar energy storage device, and the smoke screen generation assembly comprises a smoke screen generation device, a smoke screen guide pipe, a reflective mirror and a second solar energy storage device. According to the device, laser generated by the laser generating assembly forms a laser strip in an area below a low vertical arc point of the overhead conductor, and the smoke screen is generated by the smoke screen generating assembly, so that the formed laser strip is clearly displayed, a visual warning effect is generated for a driver passing through a road, and the driver of a passing vehicle is reminded of existence of an obstacle at the high altitude in front of the vehicle; the safety problem caused by wire contact and the like is avoided; and meanwhile, the warning device adopts the laser strip for warning, so that the stability is good, and the reliable and effective operation of the device is ensured.
Owner:PINGDINGSHAN POWER SUPPLY ELECTRIC POWER OF HENAN
Smoke scattering infrared laser simulation system and method based on diffusion model
The present invention discloses a system and method for simulating and emulating infrared lasers of smoke scattering based on a diffusion model. The system includes a smoke diffusion process simulation subsystem and a smoke scattering process simulation subsystem. The method is as follows: first, the smoke diffusion process simulation subsystem generates smoke particles, performs statistics on smoke particle state information, analyzes smoke particle interactions, and performs smoke particle state transfer and state updates. Then, the smoke scattering process simulation subsystem uses a laser to emit photons, calculates the photons scattered by smoke particles, and finally uses a detector to receive photons to obtain the ratio of the received photon count to the number of emitted photons, which is the transmittance of the corresponding smoke. The present invention can fully simulate the effects of collisions, agglomeration, and external forces between smoke particles in actual environments, thereby improving the accuracy of the simulation method. It can also simulate the dynamic changes in the various state attributes of the smoke during its formation, and can evaluate the interference effect of the smoke on the infrared laser fuse.
Owner:CHINA SHIPBUILDING IND CORP NO 723 RESEARCH INSTITUTE
Low-smoke medicament based on mesoporous silica adsorption and preparation method thereof
PendingCN119874463AExplosive working-up apparatusNon-explosive/non-thermic compositionsFirecrackerFireworks
The invention discloses a low-smoke medicament based on mesoporous silica adsorption and a preparation method thereof, and belongs to the technical field of firework medicament composite materials. The preparation process of the low-smoke medicament comprises the following steps: synthesizing a mesoporous silica material, carrying out amination modification on the surface of the mesoporous silica material, introducing the mesoporous silica material into a high-molecular fluoride-active metal medicament system, and compounding with an energetic material RDX to obtain the mesoporous silica adsorbed low-smoke medicament, the concentration rho PM10 of PM10 generated by explosion of the obtained low-smoke medicament is less than or equal to 63mu g / m < 3 >, and the concentration rho PM10 is less than or equal to 63mu g / m < 3 >. And the PM2.5 concentration rho PM2.5 is less than or equal to 35 [mu] g.m < 3 >, and a good low-smoke effect is shown. Compared with the prior art, the aminated mesoporous silica in the obtained pyrotechnic composition can adsorb smoke screen particles generated by explosion, can capture CO2, can reduce the smoke amount in the firework setting-off process and improve the ornamental value of fireworks, has the advantages of being safe, environmentally friendly and green, and has good application value in the field of fireworks and crackers.
Owner:LIUYANG QIFANG ENVIRONMENTAL PROTECTION MATERIALS CO LTD
Method and device for evaluating effect of terahertz band smoke screen jamming
The application discloses a method and device for evaluating the effect of a terahertz band smoke screen jamming, and belongs to the field of terahertz imaging. A long-distance terahertz band smoke screen jamming characteristic measuring device is designed, so that the optical path of a generation path is lengthened, a smoke box device can be placed on the generation path, terahertz waves can penetrate a real smoke screen to form an image, and the optical path difference between the generation path and a detection path is set to n times of a laser period, so that the terahertz waves and detection light can meet, and it is ensured that the terahertz waves can be detected. The imaging evaluation method can simultaneously consider the attenuation and scattering effects of the smoke screen on the terahertz waves, so that the smoke screen jamming characteristics are evaluated by using real and accurate measurement results, and the accuracy of the evaluation of the terahertz band smoke screen jamming effect can be improved.
Owner:BEIJING INST OF ENVIRONMENTAL FEATURES
Method, system and device for generating a visible light obscuration smoke screen
This invention relates to a method, system, and device for generating visible light shielding smoke. The method includes: controlling a compressor to deliver compressed air into a combustion chamber; controlling a fuel supply device to deliver a first preset amount of first fuel to the front end of the combustion chamber, causing the first preset amount of first fuel to burn with the compressed air in the combustion chamber to generate high-temperature fuel gas; controlling the fuel supply device to deliver a second preset amount of second fuel to the rear end of the combustion chamber, causing the second preset amount of second fuel to mix and evaporate with the high-temperature fuel gas to form a mixed flue gas containing fuel vapor; and controlling a turbine to eject the mixed flue gas generated in the combustion chamber through a tailpipe to form a visible light shielding smoke screen. This invention solves the problem that traditional smoke screen generating devices require a misting fuel injection mechanism after the turbine of a gas turbine engine, resulting in a large size, heavy weight, and inconvenience in use.
Owner:SUZHOU LINGDONG GUOCHUANG TECH CO LTD
High-strength rigid ceiling screen
The utility model discloses a high-strength rigid ceiling screen, and particularly relates to the technical field of ceiling screens, which comprises a titanium alloy frame, alloyed toughened glass is fixedly arranged in the titanium alloy frame, a fixing frame is arranged at the top of the titanium alloy frame, and a fixing mechanism is arranged in the fixing frame. The fixing mechanism comprises a fixing frame inserted into the fixing frame, a plurality of fixing cylinders are fixedly arranged in the fixing frame, fixing columns are slidably arranged in the fixing cylinders, and springs are arranged outside the fixing cylinders and the fixing columns in a sleeving mode. The utility model has the advantages that the operation is convenient, the inclined plate can be clamped into the fixing frame during installation to realize firm connection, the adjusting plate can control the retraction of the inclined plate during disassembly, and meanwhile, the alloyed toughened glass is combined with the fireproof fiber reinforced plate to prevent smoke from penetrating, and the reinforcing steel bars further enhance the rigidity to effectively prevent smoke from spreading; and secondly, splicing of multiple pieces of alloyed tempered glass can be achieved, and the requirements of different scenes are met.
Owner:ZHENGZHOU JINKUN DOOR IND CO LTD
Smoke screen visible light shielding area measurement method based on probability model and light flow
The invention provides a smoke screen visible light shielding area measuring method based on a probability model and an optical flow, and aims at solving the problems that an existing visible light smoke screen measuring method is complex in testing equipment, high in requirements for illumination and scenes, prone to being interfered and neglecting a local gray level structure in an image and the like. And performing intelligent identification and extraction on the smoke screen shielding area in the scene. The smoke screen shielding area is extracted based on a computer vision algorithm, the operation is simple, and extra auxiliary measurement equipment such as a marker post is not needed; stable and rich image features are adopted, the robustness is high, and the method is not prone to being influenced by illumination changes and scenes; the local gray level structure change of the image is estimated by adopting the optical flow method, and the capability of accurately evaluating the smoke screen shielding effect is achieved. For a large-area smoke screen measurement task, the method is economical and easy to implement, can meet task requirements, and has a relatively high application value.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
A method for measuring the visible light shielding area of smoke screen based on probability model and optical flow
The present invention provides a method for measuring the visible light obstruction area of a smoke screen based on a probability model and optical flow. This method addresses the problems of existing visible light smoke screen measurement methods, such as complex test equipment, high requirements for lighting and scenes, susceptibility to interference, and neglect of local grayscale structures in images. The method combines a probability model with an optical flow method to intelligently identify and extract smoke-obstructed areas in a scene. The present invention extracts smoke-obstructed areas based on a computer vision algorithm, is simple to operate, and does not require additional auxiliary measurement equipment such as benchmarks. It utilizes stable and rich image features, is highly robust, and is not easily affected by lighting changes and scenes. It uses an optical flow method to estimate local grayscale structural changes in the image, enabling accurate assessment of the smoke screen's obstruction effect. For large-area smoke screen measurement tasks, the present invention is economical and easy to implement, can meet task requirements, and has significant application value.
Owner:SHANGHAI INSTITUTE OF TECHNICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Automatic ceiling screen
ActiveCN224056497UDoes not affect architectural spacehigh sensitivityFire rescueBoring toolsSmoke screenMechanical engineering
The utility model relates to the technical field of smoke-blocking vertical walls, in particular to an automatic smoke-blocking vertical wall which comprises a smoke-blocking vertical wall body, a traction mechanism, a triggering mechanism and a sensing device. The ceiling screen main body is arranged below a bare ceiling or on a decorative ceiling; the traction mechanism is connected with the smoke screen main body and is used for adjusting the lifting of the smoke screen main body; the traction mechanism is connected with the triggering mechanism; the sensing device is detachably connected with the triggering mechanism; when the induction device is triggered, the triggering mechanism can be triggered to drive the traction mechanism to move, and lifting of the ceiling screen body is adjusted. The induction device is a liquid glass bulb or a device containing easily-melted metal. According to the automatic smoke-blocking vertical wall, after the induction device induces high-temperature gas or smoke dust and is triggered, the triggering mechanism drives the traction mechanism to move so as to control and adjust the lifting of the smoke-blocking vertical wall main body, and the induction device does not need to be networked or provide a signal for use, and can automatically react and independently work.
Owner:CHINA CONSTR FOURTH BUREAU CIVIL ENG CO LTD
A CFD simulation-based method for smoke screen deployment decision-making
ActiveCN114462327BDesign optimisation/simulationComplex mathematical operationsSimulationGeometric modeling
A CFD simulation-based smoke screen deployment decision-making method includes smoke screen simulation and deployment scheme selection. Smoke screen simulation obtains the smoke concentration function of a single smoke screen deployment device: c = C(x,y,z,α). The smoke screen simulation includes the following steps: geometric model construction, mesh generation, calculation parameter setting, wind field model solving, discrete phase setting, discrete phase solving, simulation result correction, and result export. The deployment scheme selection steps include: combining the three-dimensional smoke concentrations obtained from the smoke screen simulation into a large number of candidate deployment schemes; calculating the superimposed three-dimensional smoke concentration generated by multiple smoke screen deployment devices in each candidate deployment scheme; calculating the smoke screen coverage area of each candidate deployment scheme; and selecting the candidate deployment scheme with the largest smoke screen coverage area as the optimal deployment scheme. This method is simple in principle and easier to implement on low- to medium-spec computers.
Owner:YICHANG TESTING TECHNIQUE RESEARCH INSTITUTE
A control method of a smoke screen driving mechanism and a smoke screen driving mechanism
The present disclosure relates to a smoke screen driving mechanism control method and a smoke screen driving mechanism, the method is applied to the smoke screen driving mechanism, the smoke screen driving mechanism comprises a screw nut and a driving rod, the outer periphery of the screw nut is provided with a first magnet structure, one end of the driving rod connected with the screw nut is provided with a second magnet structure, the screw nut and the driving rod are magnetically connected, and the driving rod is used for driving the movement of the smoke screen, the method comprises the following steps: in the case that the driving rod drives the smoke screen to close, a target magnetic force is obtained, the target magnetic force is the magnetic force between the first magnet structure and the second magnet structure; the target magnetic force is compared with a preset magnetic force to obtain a comparison result, the preset magnetic force represents the resistance when the closing of the smoke screen is blocked; and the movement of the screw nut and the driving rod is controlled according to the comparison result. The present disclosure can detect whether the magnetic force between the first magnet structure of the screw nut and the second magnet structure of the driving rod is greater than the preset magnetic force, and then control the movement of the driving mechanism.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD