Abstract: A shoe energy collecting device includes a shell, a piezoelectric assembly, an elastic component, a magnet array, a base, a supporting block, an upper friction assembly and a lower friction assembly. The shell includes a supporting shell and a plastic shell connected in sequence. The base is provided below the supporting block in the supporting shell, the lower friction assembly is provided between the supporting block and the base. The upper friction assembly is provided on an inner wall of a top surface of the plastic shell. A coil is provided on a lower surface of the lower friction assembly at a side of the plastic shell, and the magnet array is provided below the coil. The piezoelectric assembly is provided in the plastic shell, the elastic component is provided on a side wall of the plastic shell away from the supporting block, and connected with the piezoelectric assembly.

Abstract: An ocean energy collection device is provided. The device includes a first friction assembly, a second friction assembly, and a gravity center adjustment assembly disposed in sequence from outside to inside, and a control and energy storage assembly arranged on the gravity center adjustment assembly. The first friction assembly includes a spherical housing, a first electrode layer, and a first friction layer which are disposed in sequence from outside to inside. The second friction assembly includes a tumbler-shaped shell, a second electrode layer, and a second friction layer which are disposed in sequence from inside to outside. The gravity center adjustment assembly is fixed in the tumbler-shaped shell. The first friction assembly and the second friction assembly can realize electrification by friction. The first electrode layer, the second electrode layer, and the gravity center adjustment assembly are connected with the control and energy storage assembly.

Abstract: An electromagnetic and triboelectric hybrid energy collector for low-frequency movement is provided. The electromagnetic and triboelectric hybrid energy collector comprises an electromagnetic module, triboelectric modules and spring mass modules. The electromagnetic module includes a shell, a magnet frame, a magnet array, coil arrays, coil frames and coil magnetic conductive columns. The spring mass modules include respective springs, respective mass blocks and respective end caps. The triboelectric modules include multiple nano-friction power generation units which are connected in sequence. When the energy collector is excited to move a magnet assembly. The electromagnetic module generates voltage according to the Faraday's law of electromagnetic induction. The movement of the magnet assembly generated by external excitation may also cause contact and separation between triboelectric units to generate voltage.

Abstract: The present invention discloses a quasi-zero-stiffness (QZS) based six-degree-of-freedom (6-DOF) absolute displacement and attitude measurement device. A lower end coil and an upper end coil are respectively charged with currents in the opposite directions; The electromagnetic field and the magnetic fields of an upper magnet and a lower magnet per se are mutually acted to produce an electromagnetic stiffness opposite to the stiffness of a spring. The stiffness of the whole leg is close to zero stiffness. When the to-be-measured platform generates space motion, the reference platform is in the stationary state. At this point, the deformation amounts of the six legs can be measured by laser displacement sensors. The six deformation amounts are respectively inputted into the displacement and attitude resolver, and by forward kinematic solution of the 6-DOF device, the displacement and the attitude of the to-be-measured platform can be obtained.

Abstract: The present disclosure provides a single-degree-of-freedom (SDOF) magnetic damping shock absorber based on an eddy current effect, comprising a lower plate, a ring-shaped magnet a, a ring-shaped magnet b, an aluminum cylinder, a bottom copper sheet, a copper sheet, a top copper sheet, a bearing seat, a linear bearing, a bearing end cap, a load, a piston shaft, a stepped shaft, a fixed collar, a coil spring, a lower clamping shaft, and fixing screws. When the shock absorber is working, the ring-shaped magnet a keeps stationary at the lower end and the ring-shaped magnet b reciprocates in the vertical direction. Both magnets are arranged in a mutual attraction manner. Under the action of a time-varying electromagnetic field generated by the relative movement of the ring-shaped magnet b, the copper sheet arranged between the two ring-shaped magnets generates eddy current damping. The movement of the ring-shaped magnet b is inhibited.

Abstract: A wheel-legged amphibious mobile robot with a variable attack angle, which belongs to the technical field of robot structure technology. The robot includes three parts: motion unit, body trunk and power unit. As a key structure, the motion unit mainly includes a moving mechanism, a wheel assembly, a telescopic mechanism and a transmission device. The robot drives the telescopic mechanism to reciprocate linearly through a gear and rack set, and pushes “legs” to expand and retract, so as to realize a mutual switching between a wheeled mode and a gait mode. Under transmission of bevel gear set, the blades can rotate at any same angle at the same time, to change the attack angle and realize the steering. The robot provided by the present disclosure can effectively adapt to a complex and harsh amphibious environment, and meet a series of operation requirements such as rapid movement, obstacle climbing, underwater steering.

Abstract: The present disclosure discloses a piezoelectric self-powered combination beam vibration damper and a control method thereof. An upper guiding component is installed inside an upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper elastic component is sleeved outside the upper idler wheel mechanism, a lower elastic component is sleeved outside the lower idler wheel mechanism, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end of each piezoelectric cantilever beam is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, at least one piezoelectric cantilever beam is connected with the input end of a circuit system, and other piezoelectric cantilever beams are connected with the output end of the circuit system.

Abstract: Disclosed is a self-powered vibration damper based on piezoelectricity and a control method. The damper comprises a loading platform, an energy collecting mechanism, a curved leaf spring, a vibration control mechanism and a substrate all connected in sequence, the circuit system comprises a rectifier circuit, a DC-DC voltage conversion circuit, an energy storage circuit, a control circuit and a charging battery, a first piezoelectric stack is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the DC-DC voltage conversion circuit, the output end of the DC-DC voltage conversion circuit is connected with the input ends of the energy storage circuit and the charging battery, the output end of the energy storage circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the second piezoelectric stack.

Abstract: The present invention discloses an electromagnetic-piezoelectric composite vibration control device based on a synchronized switch damping technology, and relates to the technical field of vibration abatement.

Abstract: The present invention discloses an afterload device for ex situ heart perfusion, which includes an afterload energy storage module, a pressure regulation module and two flow rate regulators that are connected through a conduit. The afterload energy storage module includes a rigid closed container and a flexible container. The perfusion fluid flows into the flexible container from one side thereof through the conduit, and the perfusion fluid flows out from the flexible container at another side thereof as the flexible container is subjected to the action of the medium pressure in the rigid hermetic container. The pressure regulation module includes two pressure regulation valves and a compressible-medium source, for regulating the pressure range within the rigid hermetic container to be always maintained between the set diastolic pressure and the set systolic pressure.

Abstract: The present invention discloses a stiffness-adjustable electromagnetic spring. The spring includes a central shaft, an intermediate electromagnetic force control component, and two end electromagnetic force control components, where the two end electromagnetic force control components are located on both sides of the intermediate electromagnetic force control component, the two end electromagnetic force control components and the intermediate electromagnetic force control component are both sleeved on the central shaft, and the intermediate electromagnetic force control component is coaxial with the two end electromagnetic force control components. The stiffness of the electromagnetic spring can be controlled online and the nonlinearity can be adjusted.

Abstract: An electromagnetic type quasi-zero stiffness absolute displacement sensor that includes an intermediate shaft, upper end cover, first sliding bearing arranged on the upper end cover, upper housing fixedly connected to the upper end cover, electromagnetic coil fastened onto an inner wall of the upper housing, spiral spring, spring support connected to a lower end of the spiral spring, force sensor fastened onto a lower end surface of the spring support, lower end cover fastened onto lower end surface of the force sensor, and a lower housing connected to the lower end cover; the intermediate shaft sequentially passes through, from top down, the first sliding bearing, upper end cover, and electromagnetic coil, and is connected to an upper end of the spiral spring; and the upper housing is provided therein with a ring permanent magnet that is nested on the intermediate shaft and is not in contact with the electromagnetic coil.

Abstract: The present invention discloses a stiffness-adjustable electromagnetic spring. The electromagnetic spring includes a central shaft, an intermediate electromagnetic force control component, and two end electromagnetic force control components, where the two end electromagnetic force control components and the intermediate electromagnetic force control component are both sleeved on the central shaft, and an intermediate controllable power supply in the intermediate electromagnetic force control component is used to control an electromagnetic force of an intermediate coil on a ring magnet and a two-end controllable power supply in the two end electromagnetic force control components are used to control an electromagnetic force on the ring magnet, therefore, the stiffness of the electromagnetic spring can be controlled online and the nonlinearity can be adjusted.

Abstract: An electromagnetic type quasi-zero stiffness absolute displacement sensor that includes an intermediate shaft, upper end cover, first sliding bearing arranged on the upper end cover, upper housing fixedly connected to the upper end cover, electromagnetic coil fastened onto an inner wall of the upper housing, spiral spring, spring support connected to a lower end of the spiral spring, force sensor fastened onto a lower end surface of the spring support, lower end cover fastened onto lower end surface of the force sensor, and a lower housing connected to the lower end cover; the intermediate shaft sequentially passes through, from top down, the first sliding bearing, upper end cover, and electromagnetic coil, and is connected to an upper end of the spiral spring; and the upper housing is provided therein with a ring permanent magnet that is nested on the intermediate shaft and is not in contact with the electromagnetic coil.