88results about How to "Good bionicity" patented technology

The invention discloses a 3D printing bionic porous biological ceramic artificial bone and a preparation method thereof. A porous biological ceramic artificial bone model is designed through a TPMS and CSG combined method, slurry capable of being used for printing is prepared through biological ceramic powder and a binding agent, macropores and micropores are distributed in the porous biological ceramic artificial bone prepared through the combination with the 3D filament-free printing process, the pore diameter of the micropores is smaller than 100 micrometers, the pore diameter of the macropores is 200-800 micrometers, the total porosity is 20% to 80%, the communicating rate between the macropores is not lower than 99%, precise design of porosity, communication and homogeneity in the artificial bone is achieved, and meanwhile good pore communication is ensured. Adopted raw materials have good biocompatibility, entry passageways of cells and tissue fluid are provided by the macropores, the micropores can better adsorb tissue fluid nearby for cell growth, the cell growth speed and the new bone generation speed can be increased by combining the micropores with the marcropores, and application of the porous biological ceramic artificial bone in human body large bone defect repair clinic treatment is facilitated.

The invention relates to a power-driven artificial hand controlled by the combination of brain electricity and myoelectricity and a control method thereof. The pattern treatment of a current 3-DOF myoeletricity artificial hand has poor accuracy. The power-driven artificial hand comprises a plurality of myoelectricity picking-up sensors and brain electricity picking-up sensors. The output end of a secondary processing circuit in the myoelectricity picking-up sensors and the brain electricity picking-up sensors is connected with the input end of an A / D switching circuit. Three electrical motors are connected with a driving circuit respectively. A micro processor is connected with the output end of the A / D switching circuit and the input end signal of the driving circuit respectively. The myoelectricity picking-up sensors and the brain electricity picking-up sensors collect surface myoelectric signals from the points of a disabled arm and brain electricity signals from the top of a head and an ear. After being amplified, filtered and processed by A / D switching, the surface myoelectric signals and the brain electricity signals are input into the micro processor for further processing so as to control a 3-DOF power-driven artificial hand. The power-driven artificial hand performs control by the combination of the myoelectric signals and the brain electricity signals and module recognition, so that the accuracy is high and the control of action is reliable.

Bionic flexible wearable lower limb exoskeleton clothes driven by pneumatic artificial muscle relates to lower limb exoskeleton clothes and solve problems of poor flexibility, undesirable bionic performance and low coordinating degree with human bodies of present lower limb exoskeleton robots. The bionic flexible wearable lower limb exoskeleton clothes comprise a left leg and a right leg and further a suspension vest, wherein the left leg and the right left are individually provided with a hip part driving system, a knee part driving system and a foot part driving system; each hip part driving system is formed by hip joint antexion driving pneumatic artificial muscle, hip joint rear extension pneumatic artificial muscle, a hip joint antexion flexible rope, a hip joint rear extension belt, a hip joint rear extension transition connection flexible rope and a thigh binding belt; and each knee driving system is formed by knee joint antexion driving pneumatic artificial muscle, knee joint rear extension pneumatic artificial muscle, a knee joint antexion belt, a knee joint rear extension flexible rope, a knee joint antexion transition connection flexible rope and a shank binding belt. The bionic flexible wearable lower limb exoskeleton clothes driven by pneumatic artificial muscle is suitable for people wearing.

The invention relates to a machine jellyfish, in particular to a machine jellyfish driven by an embedded type cylindrical motor. The problem that an existing bionic jellyfish robot is limited in moving range, small in effective water spraying size and small in driving force and is not suitable for a complex water flow environment in nature is solved. A mechanical abdominal cavity end cover, a sleeve and a bottom disc base of the machine jellyfish are in sealing connection from top to bottom in sequence. A cylindrical traveling wave ultrasonic motor is arranged on the bottom disc base. A transmission cam is located in the middle of the cylindrical traveling wave ultrasonic motor. A plurality of piezoelectric ceramic pieces are evenly distributed on the outer cylinder wall of the cylindrical traveling wave ultrasonic motor. A plurality of rectangular bosses which are arrayed vertically are evenly distributed on the inner cylinder wall of the cylindrical traveling wave ultrasonic motor. The other end of each arm pushing force rod is connected with a multi-joint arm. Each arm pushing force rod and the sleeve are connected through a pushing force rod guiding flange. An auxiliary spring is arranged between each pushing force guiding flange and an arm pushing force rod close to one side of a double-idler-wheel part. The machine jellyfish is used for unmanned underwater carrying.

The invention relates to a wearable rehabilitation training device for upper limbs driven by pneumatic artificial muscles. The wearable rehabilitation training device comprises a back support assembly, a shoulder joint upward-downward swing mechanism, a shoulder joint inward-outward swing mechanism, an elbow joint swing mechanism and a wrist joint swing mechanism. A left upper end of the back support assembly is rotatably connected with a first joint shaft of the shoulder joint inward-outward swing mechanism by means of plastic bearings. The left lower end of the back support assembly is rotatably connected with the lower end of a pneumatic artificial muscle assembly A by means of a bottom plate connecting part. The shoulder joint upward-downward swing mechanism is rotatably connected with a pneumatic artificial muscle assembly B, a pneumatic artificial muscle assembly C and a joint connecting part at the upper end of the elbow joint swing mechanism by means of a shoulder joint connecting part. The lower end of the shoulder joint inward-outward swing mechanism is fixedly connected with a large arm skeleton of the elbow joint swing mechanism by means of a right-angle connecting part. The lower end of the elbow joint swing mechanism is movably connected with a small arm skeleton of the wrist joint swing mechanism in an adjustable mode. The wearable rehabilitation training device for upper limbs driven by pneumatic artificial muscles is featured by being low in weight, high in bionic performance and fine in safety.

The invention relates to the technical field of robots, particularly to a bionic masticatory robot for denture and food detection. The bionic masticatory robot consists of: an XY work platform, a mandibular mobile platform, a maxilary platform, a temporomandibular connecting piece, a drive control system, and two drive chains. The two drive chains are symmetrically arranged on both sides of the mandibular mobile platform, the mandibular mobile platform is connected above the XY work platform through a connecting rod, the temporomandibular connecting piece is connected to the mandibular mobile platform and the maxilary platform, the mandibular mobile platform and the maxilary platform are equipped with a denture model, the drive control system controls the driving chains to realize sagittal plane movement of the mandibular mobile platform and controls the XY work platform to realize horizontal plane movement of the mandibular mobile platform. The structure of the invention adopts the XY work platform to cooperate with left and right steering engines to work simultaneously, simulates the chewing movement locus of the horizontal plane and the sagittal plane, overcomes parallel mechanism, inverse kinematics, complex control, and enormous mechanism problems, and has the advantages of simple structure and simple control operation.

The invention discloses a novel bionic butterfly aircraft with independently driven double wings. The aircraft comprises a main body, wing assemblies, a micro-control system, and a power supply system. A servo motor bracket, a posterior wing connecting hinge, a controller connecting bracket, and a cell connecting bracket are installed on the main body from front to back, and are used for installing a servo motor, a posterior wing, a micro-control system, and a power supply system of the wing assemblies. The wing assemblies comprise a left wing assembly and a right wing assembly, the assemblies have the same structure and dimension parameter, and the assemblies are symmetrically installed on the left and right sides of the main body with the servo motor. The lift and thrust are generated by the flap movement of the left wing and right wing of the bionic butterfly aircraft controlled by the servo motor. The bionic butterfly aircraft realizes the no control surface aircraft control of double wings and double driving, and independently controls the flap frequency, amplitude, and beginning and end phase positions of two wings, so that the movement of pitching and yaw can be finished efficiently and stably by the bionic butterfly aircraft, and the autonomous flight of the bionic aircraft can be realized.

An on-line identification method of hand posture modes which is established by being based on sEMG relates to an on-line identification method of hand posture modes. The method includes the following steps: hand posture modes are properly programmed; a myoelectric electrode is worn on the position of an electrode for identifying hand posture modes correspondingly to a position on the forearm muscle of a person using an artificial hand; the person using the artificial hand collects the primary myoelectric data in every excited mode according to various programmed posture modes and carries out feature extraction; two decision functions are used for realizing on-line identification control and different decision functions are respectively adopted for identifying various modes between relaxing states and excited states or among excited states. With the method of the invention, the artificial hand can achieve the advantages of good real-time property, fine bionic performance, excellent reliability when holding things, etc.

A folded dielectric elastomer driver and the manufacturing method thereof are disclosed, relating to a driver and the manufacturing method thereof. The invention aims at solving the problems of long response time, big noise, large size, big weight, great electricity consumption and poor flexibility in current mechanical driving, hydraulic driving and motor driving modes. The invention sequentially folds a dielectric elastomer film which is provided with a first flexible electrode and a second flexible electrode into a cuboid body. The method is that 7-15 potions of silastic virgin rubber, 0.3-1.6 potions of activator and more than 0-5.5 potions of elasticity modulus regulation agent are mixed round with a stirring mill with a rotating speed of 40-400r / m under room temperature for 3-5 minutes and then are solidified for 16-48 hours. The driver of the invention is of big transfiguration, high elastic energy density, short response time, long fatigue lifetime, small volume, high precision, little noise, good flexibility and good simulation property. The method is simple in technique and short in technological process and the products made with the method are of reliable quality.

The invention relates to a bionic jellyfish robot, provides a bionic jellyfish robot driven by parallelly connected mechanical arms, and aims to solve the problems that the conventional bionic jellyfish robot is small in moving amplitude, small in driving force and unsuitable for the complicated marine environment. A streamline end cover, a sleeve, a pedestal and a base are sequentially connected; one end of a driving unit is connected through a motor connecting plate mounted on the pedestal; a cam driving disc is mounted on the output shaft of the driving unit inside the sleeve in a sleeving manner; a track groove is formed in each of the upper end surface and the lower end surface of the cam driving disc along the outer contour line of the cam driving disc; the contour shape of each track groove is a concave-convex contour curve; a plurality of sliding connecting bases are in sliding joint with the track grooves of the cam driving disc 9 in an annular arrayed manner through a plurality of roller shaft components; one end of each mechanical arm drive rod is connected with one sliding connecting base, and the other end of each mechanical arm drive rod is in flexible connection with a flexible mechanical arm. The bionic jellyfish robot is used for unmanned underwater transportation.

The invention provides a cornea scaffold material and its preparation method and a 3D printing method of a cornea scaffold. A technical effect of preparing a cornea scaffold by a 3D printing technology is achieved. Silkworm cocoon undergoes degumming by the use of a sodium carbonate aqueous solution; the silkworm cocoon is dissolved with a lithium bromide aqueous solution, and dialysis, suction filtration and centrifugal treatment are successively carried out to obtain a concentrated silk fibroin aqueous solution, a silk fibroin nano-structure is formed and extracellular matrix structure can be simulated; a graphene oxide aqueous solution which has undergone ultrasonic dispersion treatment is mixed with the silk fibroin aqueous solution, and mass ratio of silk fibroin to graphene oxide is 10000:1-1000:1 to raise mechanical strength and transparency of the material; and a gelatin aqueous solution and a cross-linking agent are added into the obtained mixed aqueous solution, and the mixed aqueous solution is uniformly stirred at 30-50 DGE C to regulate degradation speed of the material and guarantee that the cornea scaffold can be printed. Therefore, the cornea scaffold can be printed by the 3D printing technology.

The invention provides a bionic fishtail underwater propeller and relates to the technical field of underwater robots. The bionic fishtail underwater propeller comprises a swing mechanism, a driving mechanism, a transmission mechanism and a shell, wherein the swing mechanism comprises an elastic sheet and a rigid tail fin fixed at a tail end of the elastic sheet; the driving mechanism comprises a steering engine; the transmission mechanism comprises a winder and a connecting line, the two ends of the connecting line are fixedly connected with the two swinging sides of the elastic piece respectively, and the winder is fixedly connected with the connecting line; and the shell comprises a head shell body and a tail elastic shell body. According to the bionic fishtail underwater propeller, the steering engine drives the winder to rotate in two directions, the winder drives the connecting line to drive the elastic piece to swing left and right, the swinging process is not limited by frequency, the hysteresis effect does not exist, fish body waves are bent and continuous, the bionic effect in water is good, the bionic fishtail underwater propeller has advantages of being simple in structure, easy to control, good in flexibility and high in bionic degree.

The method of making imitation prawn meat with shrimp meat adopts adhesive of glutamine transaminase in 0.3-0.5%, fish meat and soybean protein and the making process including crushing shrimp meat, salt dissolution, mixing the adhesive, letting stand, molding and stoving. The product of the present invention has better flavor, high nutritious value and obvious imitation effect.

The invention discloses a jellyfish-like underwater robot based on a mollusk driver, comprising a sealed cabin at the upper end, a fixing device at the lower end, a control unit and a mollusk propelling unit, wherein the sealed cabin is fixedly connected with the fixing device; the mollusk propelling unit comprises mollusk tentacles and a pipeline connected with the mollusk tentacles; the mollusk tentacles are uniformly and fixedly mounted around the upper end of the fixing device so as to serve as a flexible driver of the whole robot; and the control unit is used for supplying or cutting compressive fluid to the mollusk tentacles through the pipeline to enable single or multiple mollusk tentacles to generate deformation, so that the whole robot turns or moves. According to the jellyfish-like underwater robot disclosed by the invention, the extension and constriction of jellyfish tentacles are simulated by the mollusk tentacles, and the mollusk tentacles are large in deformation amplitude, strong in driving force, high in efficiency and good in application prospect.

The invention relates to an artificial limb knee joint of a gear five-bar mechanism, comprising a gear mechanism and a link mechanism, wherein the link mechanism consists of five links in head-to-tail ligation; the gear mechanism is fixedly connected with the links by a revolving shaft; a calf link serves as the rack; the connector in the lower end of the calf link is fixedly connected to an artificial limb calf; the connector in the upper end of a thigh link is connected to a thigh socket connecting device; the thigh link and the calf link are in the same plane in space; the five links form a closed-loop structure; the gear mechanism is located on one side of the link mechanism; a intermediate control gear is meshed with an upper control gear and a lower control gear; the intermediate control gear is fixed on the revolving shaft; the other end of the revolving shaft is fixedly connected with a micro transmission; the transmission is connected with a motor; the motor supplies power to realize the stability control of the stance phase and the swing phase of the artificial limb knee joint. The artificial limb knee joint of the gear five-bar mechanism realizes the regulation of an instantaneous center and adaptive damping by means of gear ratio regulation by using the motion characteristics of the gear five-bar mechanism.

The invention discloses composite nano zirconium oxide with uniform particle size distribution, and a continuous preparation method and equipment thereof. The continuous preparation method comprises following steps: a zirconium oxide precursor and a stabilizing agent precursor are uniformly mixed, are delivered into a reactor by a carrier gas, are reacted with water vapor at a high temperature, and are subjected to rapid decomposition at the high temperature so as to obtain a composite nano zirconium oxide powder. The particle size of the obtained composite nano zirconium oxide ranges from 5 to 15nm, the stacking density is 0.2g / cm<3> or lower. The equipment comprises a feed system, a reaction system, and a product collecting system. The composite nano zirconium oxide prepared via the continuous preparation method is low in particle size and density, and exists in the form of aerosol. Multistage post-processing product collection and tail gas treatment are adopted in the equipment, so that a technical problem the effective collecting of composite nano zirconium oxide particles is difficult to realize is solved, product yield is increased, and air pollution caused by effusion of solid dust is prevented.

The invention provides a robojelly driven by axially parallel annular shape memory alloy, and relates to the bionic robojelly. The robojelly aims to solve the problems that an existing bionic robojelly is complex in structure, small in the motion range, and greatly different from the bionic push behavior of a real medusa. The robojelly comprises a power source module, a control module and a communication module and further comprises a flexible shell, a cylindrical abdominal cavity, a rotating body base, the control module, the communication module and a plurality of annular memory alloy drive components. Each annular shape memory alloy drive component is composed of a shape memory alloy wire and an open annular flexible pipe wrapping the shape memory alloy wire, and the annular memory alloy drive components are embedded in the circumferential side face of the flexible shall respectively. The cylindrical abdominal cavity is connected with the rotating body base in a detachable and sealed mode, and the power source module, the control module and the communication module are arranged in the cylindrical abdominal cavity. The robojelly driven by the axially parallel annular shape memory alloy is used for manufacturing bionic medusa machines.

The invention relates to a three-freedom-degree leg mechanism driven by pneumatic artificial muscle, and belongs to the technical field of biomimetic robots, and the three-freedom-degree leg mechanism can be used for a biomimetic robot. The three-freedom-degree leg mechanism comprises a hip joint side-sway mechanism, a hip joint back-forth-sway mechanism and a knee joint back-forth-sway mechanism. The left end of the hip joint side-sway mechanism is connected with a machine body in a hinged mode, and the right end of the hip joint side-sway mechanism is provided with a side-sway connecting rod which is fixedly connected with a back-forth-sway T-shaped shaft at the upper end of the hip joint back-forth-sway mechanism; the lower end of the hip joint back-forth-sway mechanism is fixedly connected with the middle of the knee joint back-forth-sway mechanism, and the back-forth-sway T-shaped shaft is connected with the upper end of the knee joint back-forth-sway mechanism in a rotating mode through a pin bolt; The hip joint side-sway mechanism, the hip joint back-forth-sway mechanism and the knee joint back-forth-sway mechanism are internally provided with pneumatic artificial muscle assemblies and are driven by the pneumatic artificial muscle assemblies to rotate. According to the three-freedom-degree leg mechanism driven by pneumatic artificial muscle, the three joints are driven by pneumatic artificial muscle, so that three-freedom-degree high-speed motion of a leg mechanism is achieved, and the three-freedom-degree leg mechanism has the advantages of being light in weight, compact in structure, flexible in motion and the like.

The invention discloses a preparation method for a tissue engineering collagen-hyaluronic acid-chondroitin sulfate electrostatic spinning bracket, which is characterized by comprising the following steps: preparing a solvent, a glue solution, and the electrical spinning solution, and then performing electrostatic spinning. The bracket prepared by the method not only has a three-dimensional porous structure, but also has extracellular matrix highly bionic property with high tissue compatibility, controllable size and shape, and controllable porosity and diameter of spun nanofibers in a certain range; and the majority of extracellular matrix is a network comprising water, the collagen, polysaccharide (hyaluronic acid, chondrotin sulfate and the like), inorganic substance and the like, so that the collagen-hyaluronic acid-chondroitin sulfate electrostatic spinning bracket has a wide application prospect in the field of the tissue engineering bracket, in particular the soft tissue engineering bracket.

The invention provides a metamorphic mechanism. The metamorphic mechanism comprises a bracket, a mode switching module, a delay module, a connecting module, an external leg connecting rod and a flapping-wing robot body, wherein the mode switching module, the delay module, the connecting module, the external leg connecting rod and the flapping-wing robot body are arranged on the bracket; the mode switching module mainly consists of a five-rod connecting rod structure and a third shaft; the third shaft is connected with an output shaft of a flapping-wing robot stepping motor and matched with theconnecting module; the delay module is a geneva mechanism, which consists of a pair of bearing seats, a first shaft, an external engaged geneva wheel, a rotating shifting disc and a second shaft; theconnecting module comprises a gear I and a gear II; the two gears are engaged with each other; the external leg connecting rod and the external engaged geneva wheel are mounted on the first shaft; the gear II and the rotating shifting disc are mounted on the second shaft; the gear I and a first rod are mounted on the third shaft; and the whole metamorphic mechanism is positioned at the central position of the belly part of a bionic flapping-wing robot. According to the metamorphic mechanism, the dynamic switching of the flapping-wing robot between a flying mode and a running mode can be realized, energy and time consumption can be reduced and the application range of the robot can be expanded.

The invention relates to the technical field of mosquito and insect hunting and in particular to a heating micro-evaporation mosquito killer in order to solve a technical problem in the prior art that a conventional mosquito killer has a poor mosquito killing effect. The killer comprises a housing, a light attraction mechanism, a temperature attraction mechanism and a collection mechanism. The housing comprises an upper cylinder, a lower cylinder and ribs arranged between the upper cylinder and the lower cylinder. A trapping space is formed among the upper cylinder, the lower cylinder and the ribs. The light attraction mechanism is installed in the housing and emits light outwards to attract mosquitoes and insects to the trapping space. The temperature attraction mechanism is arranged at the top of the light attraction mechanism and comprises a trapping device used for containing liquid baits and a heating device under the trapping device. The collection mechanism is arranged under the light attraction mechanism and used for collecting and killing mosquitoes and insects attracted by the light attraction mechanism and the temperature attraction mechanism. The heating micro-evaporation mosquito killer can simulate human body temperature and expiration and achieves a good bionic effect, thereby attaining the best trapping effect.

The invention relates to the field of soft robots, pneumatic control and bionics, in particular to a primate bionic robot driven by pneumatic muscles. The bionic robot comprises bionic grippers, an arm A, a driving joint stress wheel, an arm B, a joint driving steel wire rope, the joint driving pneumatic muscle A, the joint driving pneumatic muscle B, a pneumatic muscle mounting base, a shaft andbearings. The bionic grippers are connected with the arm A, the arm A and the arm B are connected through the shaft, the bearings sleeve the shaft, and therefore the rotation of the arm A and the armB is achieved. The driving joint stress wheel is fixed to the shaft end of the arm A, the other end of the arm B is fixed to the pneumatic muscle mounting base, one end of the joint driving pneumaticmuscle A and one end of the joint driving pneumatic muscle B are fixed to the pneumatic muscle mounting base and are parallel to the arm B, and the other end of the joint driving pneumatic muscle A and the other end of the joint driving pneumatic muscle B are connected through the joint driving steel wire rope. According to the robot, the limitation of a motor and a speed reducer is gotten rid of,and compared with traditional primate bionic robots, the self-weight of the robot is greatly reduced.

The invention relates to a surface treatment method of an implant and a bionic implant. The surface treatment method comprises the following steps of: providing a titanium implant, performing anodic oxidation on the titanium implant, and forming titanium dioxide nanotubes on the surface of the titanium implant; cleaning the anodized titanium implant, drying, sterilizing at high temperature and high pressure, and irradiating under an ultraviolet lamp to obtain an activated titanium implant; providing bone marrow mesenchymal stem cells, and respectively inoculating the bone marrow mesenchymal stem cells on the surface of the activated titanium implant; adding an alpha-MEM culture medium containing 10% FBS, culturing in an incubator for at least 2 days, adding an osteogenic induction solutionfor culturing, and inducing for at least 14 days to obtain an initial product; and carrying out decellularization treatment on the initial product. An environment similar to the osteogenesis state ofthe human body is built on the surface of the titanium implant, the biological function of the titanium implant is increased, and the bionic effect is achieved.

A multi-degree-of-freedom artificial hand control device based on a multiple force sensing resistance sensor relates to a multi-degree-of-freedom artificial hand control device, which is provided for solving the shortcomings of the muscle surface electrical signal artificial hand control device of weak interference resistance, poor biomimetic performance and few control modes. The multi-degree-of-freedom artificial hand control device is composed of an information collection module, a signal analysis and processing module, a DSP-based artificial hand control module, etc; wherein, the information module is composed of a force sensing resistance sensor and a circuit switching processing module; the force sensing resistance sensor is installed at the inner side of an artificial limb tube, which coincides with the shape of the forearm, and fully contacts the forearm muscle; the signal output end of the force sensing resistance sensor is connected with the signal input end of the circuit switching processing module; the output end of the information collection module is connected with the signal input end of the signal analysis and processing module; the digital signal output end of the signal analysis and processing module is connected with the digital signal input end of the DSP-based artificial hand control module. The multi-degree-of-freedom artificial hand control device has the advantages of high interference resistance, good biomimetic performance, many control modes and high sensitivity.

The invention belongs to the field of computer vision and bionic robots, and relates to a high-precision bionic eye device, in particular to a magnetic levitation driving-based 3-DOF bionic eye movement device and a movement method thereof. The magnetic levitation driving-based 3-DOF bionic eye movement device comprises a bionic eyeball and a three-degree-of-freedom spherical parallel mechanism which drives the bionic eyeball to rotate; a camera device is fixed to the bionic eyeball; and the three-degree-of-freedom spherical parallel mechanism drives the bionic eyeball to rotate through magnetic levitation. The magnetic levitation driving-based 3-DOF bionic eye movement device and the movement method thereof, the mode of driving the bionic eyeball to rotate by adopting the magnetic levitation is adopted; compared with the existing mechanical connecting rod transmission mode, the mechanical structure is simpler; the transmission precision is higher; and the noise is lower.

The invention relates to the technical field of differential fibers and productions thereof. In order to solve problems of surface reflection and shining of polyester, the present invention provides matte eight-leaf polyester fibers and a production method thereof, wherein a crystallization accelerator is added during polyester condensation polymerization production, and a spinning plate with a eight-leaf-shaped spinning hole cross section is adopted to spin to obtain the matte eight-leaf polyester fibers. According to the present invention, the produced fibers have good matt property without addition of titanium dioxide, and further have characteristics of good moisture absorption and sweat discharging, good dyeability, good bionic property, wide application range, and high product added value.

The invention discloses a floating and sinking device for a bionic robotic fish and the bionic robotic fish. The floating and sinking device comprises a base plate and floating and sinking parts. The floating and sinking parts are symmetrically arranged on the two side surfaces of the base plate. Each floating and sinking part comprises a dielectric elastomer film layer, an electrode layer, a conductive assembly and an elastic assembly. The dielectric elastomer film layer is arranged on the base plate, and an arc-shaped first cavity is formed between the dielectric elastomer film layer and the base plate; the electrode layer wraps the dielectric elastomer film layer; the conductive component is electrically connected with the electrode layer; and one end of the elastic assembly is arranged on the base plate, and the other end is connected to the dielectric elastomer film layer. According to the floating and sinking device for the bionic robotic fish, the size of the floating and sinking device can be changed by controlling a voltage value of an external power source connected to the conductive assembly so as to change the buoyancy of water borne by the bionic robotic fish, and then the floating, floating stopping and sinking actions of the bionic robotic fish are achieved. Therefore, the floating and sinking principle similar to that of fishes is achieved, and the bionic performance of the floating and sinking device is better.

The invention relates to ecological artificial bait for tuna longline and a preparation method therefor. The bait contains the following main constituent materials: a bait skeleton and bait film coating (outer coating) materials, wherein the bait skeleton is prepared from artificial or natural, degradable and harmless materials, and the density of the materials is higher than that of sea water, and the bait film coating (outer coating) materials contain adjuvants such as polyvinyl alcohol (PVA), polycaprolactone (PCL), poly(butylene succinate) (PBS), aliphatic polycarbonate (APC), polyurethane (PU), ethylene-vinyl acetate copolymer (EVA), styrene-ethylene / butadiene-styrene copolymer (SEBS), sodium alginate (SA), hydroxypropyl methylcellulose (HPMC), methylcellulose (MC), protein, amino acid, starch, glycerine and cane sugar, as well as a fish luring agent, a coloring agent, an illuminating agent and the like. A film coating, which is proper in material density and has good dispersing and fish luring agent slow-releasing capacity, can be prepared through mixing the film coating materials at a proper ratio; and the ecological artificial bait is ideal in rigidity, toughness and weather resistance, excellent in mechanical properties, breakage resistance and tear resistance and easy to operate, transport and store. The novel ecological artificial bait can be prepared by a simple process and has a very good simulated effect, thereby being capable of replacing the traditional fresh bait.