13 results about "Underwater" patented technology

The invention relates to an underwater biomimetic robotic fish which comprises a main cabin body, pectoral fins respectively arranged on both sides of the main cabin body, a driving module arranged on the rear part of the main cabin body, a fan-shaped tail fin arranged on the rear part of the driving module and connected with the driving module through upper and lower connecting rods, and a dynamic seal mechanism arranged between the upper connecting rod and the output end of the driving module; the main cabin body comprises a casing with windows on left and right sides, and a bottom window, each window is respectively connected with a side cover and a bottom cover, and a sliding block device is connected with the bottom cover; the sliding block device comprises a front bracket and a rear bracket arranged on the bottom cover, the front and rear brackets are connected with a screw rod and a polished rod through bearings, a sliding block is nested on the screw rod and the polished rod, one end of the screw rod penetrates through the rear bracket to connect with a lower gear, the lower gear is meshed with an upper gear, the upper gear is fixedly connected the output end of a serial motor, and the serial motor is fixed on the upper part of the rear bracket. The invention has good underwater three-dimensional movement ability, certain environment adaptability, stability and reliability, flexible movement, is used for underwater resource exploration, marine salvage, rescue and other tasks, and also can play a significant role in future sea battle missions.

The invention discloses an intelligent underwater combined navigation fault diagnosis method which comprises the following steps: classifying faults of an underwater combined navigation system into a noise burst type system fault, an information burst type system fault and an information gradual change type system fault; judging whether the burst type system fault happens or not by using an improved residual*2 detection method; if the burst type fault happens, isolating a fault subsystem; calculating an average residual value and a residual absolute sum value, and judging whether the system has the noise burst type system fault or the information burst type system fault according to the calculation result, so as to make a preparation for system reconstruction after the fault of the fault subsystem is eliminated; and calculating an average normalization residual value and an adjacent statistic period residual absolute sum value, and judging whether the gradual change type fault happens or not according to the calculation result. By adopting the method, the defect that a fault detection system judges a fault system as a non-fault system by mistake because of the tracking characteristics of a filter is avoided, and meanwhile, various faults in the underwater combined navigation system can be rapidly and accurately judged.

The invention relates to a composite underwater sound transmission rubber material and a preparation method thereof. A component A is prepared through steps of plasticating natural rubber, then adding into an internal mixer for mixing, adding metallic oxide, inorganic filler, active agent and accelerator for mixing, and discharging sheets by an open mill and testing; a component B is prepared through steps of plasticating chloroprene rubber, then adding into the internal mixer for mixing, then sequentially adding stearic acid, antiager, carbon black, inorganic filler and softener for mixing, adding sulphur for mixing, discharging sheets and cooling down; the composite underwater sound transmission rubber material is prepared through steps of mixing the component A and component B according to proportion of 1:1, packaging into triangle, thinning, discharging sheets, sampling for sulfuration test, and sulfurizing at relatively low temperature. The acoustic impedence of the material and acoustic characteristic impedence of water are well matched, the sound attenuation coefficient of sound wave transmitting in sizing material is low, the material has good hydrolytic resistance and silicone oil resistance; the material can be stored for long time, is safe to operate, has high underwater sound transmission performance, and can be sulfurized at low temperature so that the contradiction between low temperature sulfurization and normal temperature storage is relieved.

The invention discloses a bridge detection structure and a detection method thereof. The bridge detection structure comprises a detection ship, an overwater device installed on the detection ship andused for being close to a pier, a fixing device installed on the overwater device and used for surrounding the pier, a lifting device installed on the fixing device and used for entering underwater, and a detection device installed on the lifting device and used for detecting defects of the pier. The overwater device comprises a base, an adjusting assembly installed on the base and a fixing base which is installed on the adjusting assembly and is always parallel to the horizontal plane in the moving process. The fixing device comprises a driving assembly and a supporting assembly installed onthe driving assembly. The lifting device comprises a lifting assembly and an underwater platform assembly installed on the lifting assembly. The bridge detection structure overcomes the defects of theprior art, provides the special underwater detection structure for the bridge pier, and solves the problems that the existing underwater detection of the bridge pier depends on manpower, and the working intensity is high and the detection risk is high.

The invention discloses a rescue device and method based on a helicopter. The rescue device comprises the helicopter and a hanging basket. The helicopter is provided with a controller, a control wire and a cable. The hanging basket is provided with an underwater infrared camera, a power pump, air bags, an air bag control motor, a rotation-angle motor and motor hinges. The underwater infrared camera is used for shooting the underwater surrounding environment of a person in distress in real time and sending the obtained underwater pictures to the controller. The controller analyzes and processes the received pictures and then controls the power pump to work, so that the hanging basket moves to be close to the person in distress for rescue activity. The air bags help the hanging basket to float out the sea, and secondary damage in the lifting process can be avoided. The motor hinges enable the four walls of the hanging basket to be in a three-dimensional state from a tiled state, so that the person in distress is fixed into the hanging basket and prevented from sliding out of the hanging basket. The invention further discloses a rescue method based on the helicopter. By means of the rescue device and method, offshore rescue efficiency is improved, and health of rescue staff is improved.

The invention aims at providing a secondary oscillating joint structure of an underwater electric manipulator. The secondary oscillating joint structure comprises box bodies, worm wheels, worms, worm wheel output shafts, motors, a joint fixing flange and end covers, wherein the joint fixing flange is connected with the box bodies; the motors are mounted inside the joint fixing flange; the worm wheels and the worms are mounted inside the box bodies; the worm wheels are connected with the motors through the worms; the number of the end covers is four, and the four end covers are respectively fixed at the front sides and the rear sides of the box bodies; and the worm wheel output shafts are connected with the worm wheels and penetrate through the end covers at the front side and the rear side. The secondary oscillating joint structure of the underwater electric manipulator has a compact structure, various forms and low cost, is easy to mount, and can realize mechanical self-locking.

The invention provides an underwater leaked oil flexible collection cover which comprises a flexible collection cover, a buoyance assembly, an outlet pipe, cables, a counterweight device or a counterweight frame. The flexile connection cover is made of thin-film-shaped waterproof materials. The underwater leaked oil flexible collection cover can be folded to be stored at ordinary time, and the counterweight device and the outlet pipe can not be connected with the flexible collection cover temporarily at the moment. The outlet pipe is assembled well before the underwater leaked oil flexible collection cover goes to sea to be used, and at least the counterweight device or the counterweight frame capable of enabling a complete device to sink smoothly is connected in a matching mode. When the underwater leaked oil flexible collection cover is used, the flexible collection cover is unfolded to be covered above an oil leaking point, and the cables are tied on a fixed structural object/or a temporarily arranged anchor and a weight under the sea in a distributed mode. Collected leaked oil is output through a pipeline. The complete underwater leaked oil flexible collection cover is light in weight, foldable, detachable, easy to store, transport and install and particularly suitable for early rapid application at emergency conditions and gains time for adoption of subsequent measures.

The invention relates to a drinking water source pollution flow mud sedimentation promoting method which comprises the steps: measuring a wind speed and a wind direction of the water surface of a drinking water source and a bottom layer water flow direction, determining a flow field under the primary wind field action and distributing an underwater submerged dike in the perpendicular direction ofthe flow field, wherein the underwater submerged dike is formed by a first ecological submerged disk and a second ecological submerged dike, the first ecological submerged dike is piled by geotechnical cloth bags which are closest to the water's edge and filled with a first filler, the second ecological submerged dike is piled by geotechnical cloth bags which are farthest from the water's edge andfilled with a second filler, and the distance of the first ecological submerged dike to the water bottom is smaller than that of the second ecological submerged dike to the water bottom. The drinkingwater source pollution flow mud sedimentation promoting method disclosed by the invention has the beneficial effect that by means of selecting an arrangement mode, filler types and filler sizes of the underwater submerged dikes, pollution flow mud sedimentation is effectively promoted, and a suspended matter concentration of the shoreward sides of the underwater submerged dikes is obviously reduced.

The invention discloses an offshore wind power negative pressure barrel base hydraulic device which comprises a rack, a suction pump, a suction pipe, a conveying pipe and a discharge pipe. A clamping mechanism is arranged at the butt joint end of the conveying pipe. The hydraulic device further comprises a locking mechanism, wherein an electromagnet is installed at the front end of the rack; a pair of rotatable supporting arms is arranged on the two sides of the electromagnet; a longitudinal wheel module and a circumferential wheel module are arranged on each supporting arm; an elastic telescopic mechanism is arranged between the rear part of each supporting arm and the front part of the rack; a distance sensor is arranged at the bottom of the rack; and a photoelectric sensor is arranged at the front part of the rack. The device further comprises a controller. According to the hydraulic device, the electromagnet is matched with the longitudinal wheel modules and the circumferential wheel modules, so that the device can be attracted to a supporting barrel of a negative pressure barrel, vertical movement and circumferential movement around the supporting barrel of the hydraulic device are accurately controlled, automatic sinking, automatic positioning and automatic butt-joint locking of the hydraulic device are achieved, and the hydraulic device is simple and labor-saving. The hydraulic device can be used 100 meters deep underwater without leakage.