5results about How to "Avoid secondary impact" patented technology

The application relates to the technical field of power distribution control, in particular to an active power distribution network fault self-healing system and a method thereof, which comprises a data sensing module, a fault positioning module, an isolation control module, a fault self-healing module and a power supply recovery module, and realizes intelligent processing of the whole process from fault detection to power supply recovery through cooperation of the multiple modules. The system can quickly position faults based on FTU layout structure and operation data, optimizes analysis efficiency in combination with a GPU computing power dynamic distribution mechanism, and realizes accurate isolation of a fault area, self-healing repair and smooth grid recovery by using intelligent strategy generation and digital twin technology. The application effectively improves the power supply reliability, system stability and operation intelligent level of the power distribution network.

The invention belongs to the technical field of anti-impact protection engineering and intelligent material application, and particularly relates to an active self-adaptive high-impact-resistant buffering device based on the synergistic effect of foamed aluminum and a dielectric elastomer. According to the device, foamed aluminum and a dielectric elastomer are innovatively combined, and an energy absorption-immobilization dual protection mechanism is constructed; a foamed aluminum layer performs passive energy absorption by utilizing buckling deformation of a porous structure, so that effective attenuation of an impact load and uniform distribution of stress are realized; the dielectric elastomer layer is used as an intelligent soft material, a control algorithm is introduced, remarkable electrodeformation and variable stiffness characteristics are generated along with the increase of the electric field intensity under impact, and active expansion hardening is carried out to fill structural gaps generated after foamed aluminum deformation. Compared with a traditional passive protection technology, the buffering device has the advantages that efficient buffering is achieved, meanwhile, equipment displacement and oscillation caused by deformation of the buffering layer are effectively prevented, secondary impact caused by rebounding of the buffering structure after impact can be effectively restrained, and the reliability of test data and the survivability of equipment in the high-impact environment are remarkably improved.

This invention belongs to the field of lead screw transmission technology and discloses a lead screw end limiting and buffering structure, including a lead screw and a limiting and buffering device. The limiting and buffering device is located at the end of the lead screw. When the nut on the lead screw moves to the end of the lead screw, the limiting and buffering device first limits the axial and rotational movement of the nut. When the limiting torque set by the limiting device is exceeded, the limiting device fails, thereby buffering. The buffer is located between the fixed part and the rotating part. The closer the distance between the fixed part and the rotating part, the greater the force exerted by the buffer on the rotating part. During normal operation, this invention achieves a reliable mechanical limiting function through the limiting pin, with high limiting accuracy. Under abnormal impact conditions, the limiting pin fails at the set torque threshold, limiting the peak instantaneous impact load below the set value, effectively protecting the lead screw, nut, and other structural components from damage, and avoiding the problem of excessive impact load generated by rigid limiting structures.

This invention discloses a large-tonnage pile foundation testing machine, comprising a base assembly and a hammer assembly. The base assembly includes a base mechanism and a force transmission mechanism, with the force transmission mechanism movably disposed within the base mechanism. The hammer assembly includes a drop hammer frame mechanism and a lifting mechanism. The core of this invention is a modular structure consisting of a base assembly and a hammer assembly. The frame and the base of the base mechanism are detachably connected. The positioning blocks of the base and the positioning holes of the frame form a precise fit, enabling rapid pre-positioning of both. The matching locking mechanism ensures a secure connection between the frame and the base. The disassembly and assembly process requires no complex procedures, and the equipment can be moved flexibly and conveniently. This structure allows for individual adjustment of each assembly component according to testing needs, adapting to the working space and testing requirements of different construction sites, significantly improving the efficiency of multi-point testing at construction sites.

The invention relates to the technical field of bridge engineering, in particular to a multi-energy-consumption pier anti-collision device and a construction method thereof. The pier anti-collision device comprises an anti-collision sleeve arranged on the periphery of a pier, and a plurality of spherical hinge structures are arranged on the periphery of the anti-collision sleeve at intervals in the circumferential direction of the anti-collision sleeve; the anti-collision modules are arranged in the peripheral direction of the anti-collision sleeve at intervals, the anti-collision modules are sequentially connected in series through elastic cables in an elastic tensioning mode to form an overall tensioning structure, and the anti-collision modules are hinged and fixed to the anti-collision sleeve through spherical hinge structures in a one-to-one correspondence mode. Therefore, the technical problems that in the prior art, energy consumption is single, the energy absorption efficiency is low, the adaptive capacity is poor, impact at different angles is difficult to deal with, the buffering effect is poor, an impact object cannot be guided to be separated after impact, and secondary impact is likely to be caused are solved.