98 results about "Water entry" patented technology

The invention belongs to the technical field of hydraulic engineering monitoring, and discloses a hydraulic engineering inspection system and method, and the method comprises the steps: a positioning monitoring deployment module reasonably distributes the number and positions of positioning monitoring assemblies; the route planning module plans an optimal unmanned aerial vehicle flight route; planning an advancing route, a water entry position and a water surface leaving position of the underwater robot; the cruise monitoring module carries out all-directional inspection on a water conservancy area; the image analysis module identifies abnormal conditions; the infrared data analysis module recognizes abnormal conditions in time; the radar data analysis module identifies abnormal conditions; the comprehensive analysis module comprehensively evaluates the water conservancy condition; the risk prediction module predicts potential problems and risks. According to the invention, the positioning monitoring assembly and the cruise monitoring module are combined to realize omnibearing monitoring of a water conservancy area; omnidirectional three-dimensional inspection is realized, multi-modal data collaborative analysis is realized, abnormal conditions are identified, potential problems and risks are predicted, and possible faults or disaster hidden dangers of water conservancy facilities can be found in advance.

The application discloses a control method of amphibious track operation equipment, and relates to the technical field of underwater operation equipment.The method comprises the following steps: according to pressure information of four walking wheel groups and an amphibious track, adjusting attitude information of suspension hydraulic cylinders of the four walking wheel groups, so that walking main wheels of the four walking wheel groups are uniformly engaged with the amphibious track; determining an auxiliary connection mode of the amphibious track operation equipment according to a water entry condition of the amphibious track operation equipment, and controlling the amphibious track operation equipment to run based on the auxiliary connection mode and contact the amphibious track.The application can maintain a stable running state of the amphibious track operation equipment at all times by adjusting the attitude information of the suspension hydraulic cylinders of the four walking wheel groups, and different auxiliary connection modes are set for different water entry conditions, so that the amphibious track operation equipment can stably contact the amphibious track in any water entry state, and the application scene and stability of the amphibious track operation equipment are improved.

The invention discloses a sinking control method and a related device, and the method is applied to an underwater robot, and comprises the steps: obtaining the body posture information of the underwater robot, and determining the relative position relation between a water inlet of the underwater robot and the water surface; motor control parameters matched with the relative position relation and the fuselage attitude information are determined, and a motor is controlled to operate according to the determined motor control parameters, so that water flow is driven by the motor to enter the underwater robot shell; and if it is detected that the underwater robot meets a preset sinking completion condition, determining that the underwater robot completes sinking. The control parameters of motor operation are adaptively adjusted based on the posture information of the machine body and the position relation of the water inlet relative to the water surface, so that water flow can effectively enter the shell of the robot in different posture states, the water filling process in the shell is accelerated, and the overall weight of the robot is increased; rapid and stable sinking of the underwater robot is achieved, and the underwater entering efficiency and the use stability of the underwater robot are improved.

The application provides a kayak athlete power output coordination control method, comprising: collecting the paddle water entry depth, the angle of attack deflection angle, the athlete power time and the hull acceleration, obtaining the complete record containing the paddle track arc and the hull acceleration change; according to the change of the straight line track and the arc track when the hull accelerates, the angle of attack deflection angle is extracted, the deviation degree of the angle of attack deflection angle and the effective propulsion angle range is evaluated, and the proportion of energy loss caused by the lateral component force under different deviation degrees is identified; according to the power output timing coordination score, the smoothness of the power transmission among the athlete, the paddle and the hull is analyzed, and the stability of the transmission efficiency in the acceleration stage is identified after removing the interference signal; according to the track optimization direction adjustment training system collection setting, the track optimization direction is returned to the collection density adjustment link, and the time interval setting of the next data collection is determined.

The utility model relates to the technical field of lotus root pool water quality monitoring, and particularly discloses a lotus root pool water quality monitoring buoy frame which comprises a flat plate, a data transmitter and a water quality detection sensor, floating bodies are installed at the four corners of the lower end face of the flat plate, and two installation frames are fixedly connected to the upper end of the flat plate. Two rope penetrating holes are formed in the upper end face of the flat plate in a penetrating mode, winding shafts are rotationally connected to the interiors of the two mounting frames correspondingly, and nylon ropes penetrating through the two rope penetrating holes correspondingly are fixedly connected to the outer walls of the two winding shafts correspondingly; the water entering length of the water quality detection sensor can be adjusted by rotating the winding shaft to wind and unwind the nylon rope, and the position is fixed by utilizing the self-locking characteristic, so that the water entering length of the nylon rope can be adjusted as required to effectively adapt to lotus root pools with different water depths, and the water entering depth of the water quality detection sensor can be changed by manually sliding the adjusting cylinder and locking the position. Height adjustment of the water quality detection sensor is achieved, flexible detection can be conducted on water layers of different depths, and the use flexibility of the device is remarkably improved.

The application discloses a water seal test device and a sealing test method for a cabin door sealing element. The water seal test device comprises a sealing box body, the sealing box body is provided with a mounting position for mounting the cabin door sealing element; a pressure applying element is movably mounted on the sealing box body, and the pressure applying element is used for being in mutual extrusion contact with the cabin door sealing element and dividing the space in the sealing box body into a first chamber and a second chamber, the pressure applying element is moved to adjust the compression amount of the cabin door sealing element; a first pressure control assembly is connected with the first chamber and used for controlling the pressure of the first chamber; and a second pressure control assembly is connected with the second chamber and used for controlling the pressure of the second chamber. The water seal test device can be used for testing the leakage of the cabin door sealing element under different compression amounts, the multiple mounting and clamping for testing different compression amounts are effectively avoided, the sealing test demand of the water entry working condition can be met, and the operation difficulty and cost are reduced.

The embodiment of the present application discloses a method for identifying screen water entry, comprising: detecting proximity data obtained by a proximity sensor; and outputting a screen water entry risk prompt when the proximity data is less than or equal to a preset alarm threshold. The embodiment of the present application also provides a device for identifying screen water entry, which identifies that water covers the surface of a display screen glass cover plate according to the signal quantity received by a sensor receiving end, judges and prompts that the intelligent terminal has a risk of water entry.

This invention discloses a method for controlling the speed lag during the water entry transient of a vehicle's propulsion system, comprising the following steps: Step 1, constructing a cross-medium aerial propulsion system and performing aerial and underwater thermodynamic design to obtain the cross-medium system configuration; Step 2, establishing a dynamic mathematical model of the cross-medium propulsion system based on the cross-medium system configuration; Step 3, designing a control algorithm based on the dynamic mathematical model of the cross-medium propulsion system to adjust the fuel pump displacement during the water entry process, achieving closed-loop control of the turbine speed, and obtaining an optimized propulsion system; Step 4, simulating the optimized propulsion system to obtain the control response characteristics of the cross-medium propulsion system during the water entry process. The speed lag control method for the water entry transient of a vehicle's propulsion system disclosed in this invention solves the problems of existing PID control being prone to instability under engineering delays and failing to provide a safety margin for the determination of response time for sensors and actuators.

This invention discloses a high-speed parallel water entry experimental launching device and method for a vehicle, belonging to the field of hydrodynamic experiments. It includes a supporting base, a parallel controller, a parallel launching assembly, and a power unit. The parallel launching assembly is mounted on the supporting base via the parallel controller, and the power unit provides launching power and adjusts the water entry velocity. The parallel launching assembly includes a first launching device and a second launching device arranged side-by-side, enabling parallel launching of two projectiles and adjustment of the launching angle. The parallel controller includes a parallel control mechanism and a spacing adjustment mechanism. The parallel control mechanism ensures the relative parallelism of the first and second launching devices, while the spacing adjustment mechanism adjusts the launching distance between the first and second launching devices. This invention has a simple and practical structure, is easy to assemble, has high reliability and durability, and exhibits good repeatability and safety, providing experimental assurance for studying the hydrodynamic characteristics of structures at the moment of water entry.

The invention belongs to the technical field of aircraft fire extinguishing design, and provides a large amphibious aircraft water throwing efficiency data expansion method, which comprises the following steps: carrying out a pre-flight test of an aircraft to obtain test state points of aircraft water throwing efficiency, including typical test state points and atypical test state points; carrying out water throwing efficiency tests on different test state points, summarizing and analyzing test data, carrying out water throwing efficiency tests on test state points corresponding to invalid data again, summarizing the test data again, and fitting the test data to obtain different water throwing efficiency relation curves; and typical test state point results are extracted to fit coefficients of the water throwing efficiency relation curve, the coefficients are combed, a change relation curve of the water throwing efficiency and different test state points is constructed, and a change curve of the water throwing efficiency along with the water throwing height under each test state point of the airplane is expanded. According to the method, data validity judgment can be improved, the test process is accelerated, and unpredictability of environment variable control caused by an overlong test period is avoided.

The invention discloses a lifeboat water entry measurement system and method based on a trajectory tracking algorithm, the system comprises a wind wave flow coupling test pool, a throwing type lifeboat release platform and a throwing type lifeboat water entry test measurement module, the wind wave flow coupling test pool is used for simulating marine environments under different working conditions; the throwing type lifeboat releasing platform is used for simulating the releasing process of the throwing type lifeboat under different working conditions; the throwing type lifeboat water entry test measurement module solves and obtains the movement track, speed and attitude angle change of the lifeboat based on a trajectory tracking algorithm, and obtains the movement response mechanism of the lifeboat; according to the invention, a complex marine environment can be simulated, multi-degree-of-freedom motion response can be captured in real time, and test measurement of a key load can be quantitatively measured.

The invention discloses a deep and far sea submarine cable laying tension accurate control method based on a water entry angle, and belongs to the technical field of ocean engineering. According to the method, a mapping model of a submarine cable water entry angle alpha and submarine cable tension T is constructed through finite element software; determining the maximum permissible tension value Tmax and the minimum permissible tension value Tmin of the submarine cable, and determining the safety threshold [alpha min, alpha max] of alpha according to the characteristic curve in the mapping model of alpha and T; according to the method, the submarine cable water entry angle alpha is monitored in real time during construction, then the relation between the submarine cable water entry angle alpha and [alpha min, alpha max] is judged, the cable laying speed is controlled accordingly, the submarine cable tension is controlled within a safe interval, the submarine cable laying tension can be ensured to be safe and controllable, and the submarine cable laying construction safety is improved.

Device (200) for cleaning grey water containing particulate material, comprising a container (201) in turn comprising a water entry (202); a slurry exit (204); a cleansed water exit (203); and a sedimentation volume (220). The invention is characterised in that the container further comprises a flocculant provision means, arranged to add a flocculant (212) to grey water entering via the water entry, so that grey water having entered said sedimentation volume after such adding contains said flocculant, in that the flocculant provision means comprises a vertical chute (213) arranged to convey, via gravity, said grey water from an upper part of said container to be released via an open lower end (215) of the chute into said sedimentation volume at a height of at the most 1 m above a bottom (221) of said sedimentation volume, the chute having a cross-sectional area of at least 0.1 m2. The invention also relates to a method.

The invention discloses a Beidou underwater sound locator, which comprises a charging unit, a power supply module, an LFM (Linear Frequency Modulation) generation module, a power amplifier and matching module and a transducer which are electrically connected in sequence, and also comprises a water entry detection module and a locating module which are electrically connected with the LFM generation module. According to the invention, the working frequency band of the sensor is effectively expanded, and through different set frequency parameters, a receiving device captures sound signals to realize positioning, so that the positions of different UUVs or frogmen are accurately identified. When an emergency occurs, the sound locator can provide reliable support for searching and locating operation, and timely and accurate rescue implementation is ensured. And navigation and tracking performance of various underwater carriers can be reliably guaranteed.

The invention belongs to the technical field of planktonic diatom sampling and microbiological detection pretreatment, and particularly relates to lake surface planktonic diatom sampling equipment which comprises a handheld rod, a weight moving mechanism, a water entering mechanism and an air supporting mechanism. The weight moving mechanism comprises a limiting assembly and a bottom suction assembly, the limiting assembly is arranged at one end of the handheld rod, and the bottom suction assembly is arranged at the other end of the handheld rod; the bottom suction assembly is arranged on the limiting assembly, the water entry mechanism comprises a push-out assembly and a sampling assembly, the push-out assembly is arranged at the end, away from the limiting assembly, of the handheld rod, and the sampling assembly is arranged on the side, away from the handheld rod, of the push-out assembly. According to the lake surface layer floating diatom sampling equipment, the net body can be kept vertically extending in water, it is ensured that a net opening always faces the water flow direction, the interior of the collecting net has the supporting capacity, and it is ensured that the effective water filtering area is stable.

The utility model relates to the technical field of modified plastic processing, in particular to a cooling and shaping device for a modified plastic extruder, which comprises a water tank and at least three guide units mounted on the water tank, each guide unit comprises a support fixed on the water tank, the support is movably connected with a mounting seat, and the mounting seat is movably connected with the water tank. A guide roller assembly for guiding a plastic strip is arranged on the mounting seat; wherein a driving assembly is further installed above the support, the driving assembly is used for driving the installation bases to move up and down, the plastic strips are guided through the design of the at least three guiding units, the water entry depth of each installation base can be changed through the driving assembly, and when the three installation bases are located at different heights, the installation bases can be driven by the driving assembly to move up and down. The stroke distance of different lengths can be formed by adjusting the stroke distance of the plastic to be cooled, so that the cooling stroke of the plastic can be adaptively adjusted according to the condition of the plastic to be cooled, and the better adaptability is achieved.

The utility model relates to zip fastener technical field, and disclose a waterproof nylon zip fastener with protection structure, include: zipper head, first zipper strip and second zipper strip set up respectively in both sides of zipper head, first zipper tooth and second zipper tooth are fixed on the opposite edge of first zipper strip and second zipper strip respectively, are used for with zipper head cooperation realizes the opening and closing of zip fastener, protective cloth strip, cover in the outside surface of first zipper strip and second zipper strip, and with first zipper strip and second zipper strip fixed connection, are used for providing additional protection. The waterproof nylon zip fastener with protection structure, waterproof effect: the rubber body of protective cloth strip innermost layer directly with zipper strip contact, can provide basic waterproof and sealing function, two protective cloth strip end surfaces contact each other further optimization sealing performance, the smooth cooperation of the chain tooth and zipper head of collocation nylon material reduces the risk of water entry in the gap in the opening and closing process, realizes the waterproof of zip fastener whole.

This invention discloses an experimental apparatus and its operating method for continuous projectile launches to penetrate ice and water at a common point. The apparatus includes an adjustment device, a launching device, an infrared sensor, a water tank, a support device, and a control system. The launching device comprises at least two launching units, an air storage chamber, a control valve, an air cushion guide rail, a support frame, and a drive device. Each launching unit is mounted on the air cushion guide rail and can move along the guide rail. The infrared sensor is fixedly mounted on the worktable to detect the position of the launching unit and output a trigger signal to open the control valve of the subsequent launching unit. The adjustment device includes a worktable, a hydraulic rod, an adjustment guide rail, and a slider, enabling continuous adjustment of the water entry angle. The water tank contains an ice-floating constraint. The control system is electrically connected to the infrared sensor and the control valve and controls the drive device. This invention enables high-precision, point-to-point control of the water entry positions of multiple projectiles, constructs a stable and controllable ice environment, and improves experimental repeatability and reliability.

The utility model discloses a kind of offshore floating photovoltaic slip installation support, including the floating part for installing photovoltaic module and being connected with cableway traction system, the slip part for connecting ground water entry track and the two-way rotating structure for connecting floating part and slip part, the floating part includes pontoon and connecting structure, connecting structure is rotatably connected with two-way rotating structure and realizes horizontal direction rotation, the slip part includes support piece, several rolling members are rotatably installed on the support piece, two-way rotating structure is fixedly connected above support piece, by setting the overall configuration including floating part, slip part and two-way rotating structure, photovoltaic module can be assembled on land, and then be slid into sea by cooperating with ground water entry track by slip part, utilize the horizontal and vertical rotation ability of two-way rotating structure Automatic adaptation sliding direction and water surface vertical angle of inclusion, without aerial work and artificial angle adjustment, avoid the problem existing in traditional installation process.

This invention discloses a water entry control method for a cross-medium vehicle propulsion system, comprising the following steps: establishing a top-level system architecture model of the cross-medium vehicle's air-to-water propulsion system; based on the top-level system architecture model, establishing a combustion chamber model, a turbine output torque equation, and a load model of the air-to-water propulsion system; introducing a custom function into the control logic module to simulate the predetermined timing actions of the engine and to achieve adaptive adjustment of the fuel pump angle based on system speed feedback; establishing a dynamic simulation model, configuring the initial boundary conditions and time step of the simulation calculation, and performing dynamic simulation on the top-level system architecture model, each sub-model, and the control logic module to generate a full-condition dynamic simulation model of the air-to-water propulsion system. This invention's water entry control method for a cross-medium vehicle propulsion system solves the problems of runaway and engine shutdown caused by the rapid coupling of multiple physical quantities during water entry.

The present application relates to the technical field of water gate cleaning, and particularly relates to a gate slot underwater cleaning device and a use method. The gate slot underwater cleaning device comprises a frame, the frame comprises a bottom plate and vertical supports arranged at four corners of the bottom plate; one climbing structure is arranged on each vertical support, each climbing structure is provided with a climbing frame, the climbing frame and the vertical support are fixedly connected through a connecting rod, the climbing frame is suitable for being electromagnetically attracted to the inner wall of the gate slot; a horizontal sensor is arranged on the bottom plate; a controller is in communication connection with the horizontal sensor and the climbing frame; in a water entry state, the horizontal sensor senses the levelness of the bottom plate and transmits the levelness to the controller in real time, the controller controls the climbing frame to move up and down along the gate slot, so that the bottom plate is kept in a horizontal state. The present application solves the problem that the automatic cleaning device is affected by multiple factors such as water flow after entering the water, and the automatic cleaning device is inclined when moving along the gate slot, thereby affecting the dirt cleaning effect.

The utility model discloses an electric power inspection well anti-seepage structure which comprises a well body, waterproof concrete is connected to the top of the well body, a well mouth assembly is connected to the top of the waterproof concrete, a top waterproof assembly is installed on the top of the well mouth assembly, through grooves are formed in the two sides of the well body, and connecting assemblies are installed in the two through grooves. According to the anti-leakage structure of the electric power inspection well, through the connecting assembly, the sealing assembly and tightening of the threads, the connecting portions on the two sides of the inspection well can be squeezed mutually, gaps are effectively filled, and therefore good sealing is formed; rainwater infiltration from the outside is reduced through the waterproof mortar outside the well body, a waterproof film is formed through the polyurethane waterproof coating inside the well body, external water is blocked to prevent water from entering, and through cooperation of various waterproof and sealing modes, rainwater can be effectively prevented from entering the well, and faults such as short circuit and electric leakage caused by damp and water inflow of equipment are prevented.

The invention discloses a head beveled angle coupling jet load reduction method for inclined water entry of a navigation body, and relates to the technical field of high-speed water entry load reduction and fluid-structure interaction control of the navigation body, the method comprises the following steps: setting a beveled angle at the head of the navigation body, the beveled angle being an included angle between the end face of the head of the navigation body and the vertical section of the axis of the navigation body; the air injection direction is adjusted through the chamfer angle, and air is guided to flow to the easily-wetted back flow side of the navigation body; when the beveling angle is in a reasonable range, the method can optimize the gas flow distribution in the cavitation bubble in the gas injection process, reduce the area of a local high-pressure area and a wetted area and enhance the collapse resistance and wrapping effect of the cavitation bubble, so that the water entry impact load and resistance are reduced. By implementing the method, a better beveling angle suitable for the inclined water entry working condition of the navigation body can be obtained, so that the air injection load reduction method has higher energy utilization efficiency and better load reduction and drag reduction performance under the inclined water entry condition.

The application belongs to the technical field of water entry parameter detection, and discloses a swimming water entry parameter detection method and system based on deep learning and projection transformation, which comprises the following steps: determining the position coordinates of visual anchor points installed around a swimming lane in a swimming lane coordinate system, obtaining video frames of the water entry process of an athlete, and each video frame containing a visual anchor point; obtaining the pixel position coordinates of each limb joint of the athlete by using a deep learning algorithm based on the video frames; obtaining a projection matrix H from the image coordinate system to the swimming lane coordinate system based on the pixel position coordinates of the visual anchor points in the swimming lane coordinate system and the image coordinate system; judging the water entry time of the athlete based on the pixel position of the hand of the athlete in the video frames and the cross product, converting the pixel position coordinate point of the hand of the athlete at the water entry time into the position coordinates of the water entry time in the swimming lane coordinate system based on H, and completing the determination of the position parameters of the water entry of the athlete. The application can detect the swimming water entry parameters in real time and with high precision in a complex scene.

The application relates to a super-cavitation vehicle high-speed water-entry buffer head cap, which comprises a fairing, a buffer assembly and a positioning assembly. The buffer assembly comprises foam plastic bodies, the densities of the foam plastic bodies are different, the foam plastic bodies are sequentially arranged in the fairing along the fairing direction, and the positioning assembly is arranged in the fairing. The device positions the buffer head cap through the positioning assembly, so as to realize the connection of the buffer head cap and the super-cavitation vehicle, reduce the vibration of the buffer head cap along the radial direction of the vehicle caused by the aerodynamic load, and ensure the load reduction effect.

A seaplane model water entry experiment synchronous control system and method, including: central control module, wave generator control module, motor control module and trigger and data acquisition module, based on real-time wave height data and propagation model prediction wave arrival experiment water area target phase delay Δt1; combined with real-time speed and free fall model dynamic calculation model release delay Δt2; in the accurate timing trigger release, shooting and collection; and innovatively adopt multi-frame image sequence depth learning phase regression and incremental bayesian optimization method, construct closed loop error compensation mechanism, adaptive correction subsequent experiment parameter. The present application is unified by central control module scheduling, realizes the time sequence synchronization of multiple devices (less than 100 mu s) at the same time, based on the adaptive control and error compensation of position feedback, realizes the accurate experiment test.

The application relates to the technical field of missile water-entry experiment, and provides a missile water-entry experiment launching device, which comprises a launching mechanism, a fixing plate, a water container, a wave-making mechanism and a missile model. The launching mechanism comprises a steering engine, a swing rod, a containing device, a first electromagnetic control assembly and a second electromagnetic control assembly. The water container is attached to one side of the fixing plate. The lower end of the wave-making mechanism is arranged in the water container to separate the water container into two parts with water level difference. The upper end of the wave-making mechanism is connected with the steering engine of the launching mechanism. The swing of the swing rod is controlled through the steering engine. Under the joint action of the first electromagnetic control assembly and the second electromagnetic control assembly, the missile model loaded in the containing device of the launching mechanism is launched into the water in the water container, and wave-making is simultaneously carried out by withdrawing the lower end of the wave-making mechanism from the water container. The missile water-entry experiment launching device has the characteristics of simple structure, strong controllability and high reliability of simulation results.

The application discloses a small portable underwater positioning signal generating device, which comprises a signal generating and emitting circuit, the signal generating and emitting circuit comprises three logic gates, four capacitors, eight resistors, nineteen transistors, a power supply, a water entry detection sensor, a transformer and an ultrasonic transducer, no programmable processor, crystal oscillator and other complex circuits are used, the device used is less, and no complex programming and burning work is needed; meanwhile, the pulse frequency and the emission frequency of the ultrasonic signal can be quickly tuned through internal resistance, low-power consumption design is adopted at multiple places, and the primary coil of the transformer cannot be directly connected with the power supply to cause instantaneous short circuit; the device has the advantages that miniaturization and low cost are combined, the device is convenient to carry by personnel and small target objects, positioning is carried out through emission of ultrasonic signals, high positioning precision is achieved, after the personnel and the small target objects fall into water, high-precision falling position coordinates of the personnel and the small target objects can be provided, the rescue time is shortened, and the rescue success rate is improved.