4results about How to "Absolute security" patented technology

This invention relates to a high-voltage interlock precision fault location system and method based on a multi-level resistor network, relating to the field of electric vehicle battery management systems (BMS). The system includes a battery management system and at least two high-voltage connectors. The battery management system is equipped with a resistance detection circuit. Each high-voltage connector contains an interlock resistor with a known resistance value. The interlock resistor is electrically connected to the resistance detection circuit, forming a high-voltage interlock detection loop. The battery management system locates the specific high-voltage connector where the fault has occurred by detecting changes in the resistance value of the high-voltage interlock detection loop. This invention achieves precise fault location, multi-level state identification, and graded safety control for high-voltage interlock faults, significantly improving fault diagnosis efficiency and vehicle availability while ensuring the safety of the high-voltage system.

This invention provides a polar unmanned aerial vehicle (UAV) navigation method and system based on image-assisted localization, relating to the field of computer vision. The navigation method includes: acquiring the coarse three-dimensional position and coarse attitude quaternions of the polar UAV; acquiring real polar starry sky images and constructing a continuous optical residual strain field; calculating the divergence and curl of the optical residual strain field, identifying and proposing refraction distortion regions and auroral interference regions to obtain an initial starry sky region; extracting multidimensional features within the initial starry sky region, iteratively correcting the effective starry sky region boundary based on Mahalanobis distance to obtain candidate starry sky regions; extracting the actual motion optical flow field and theoretical optical flow field within the candidate starry sky regions, verifying them in conjunction with the three-dimensional translational velocity vector calculated by a mobile local area network, eliminating false starry sky regions, and obtaining the optimal starry sky region; and completing the final precise positioning within the optimal starry sky region.

The application provides a conflict processing structure of a newly-built rainwater pipeline and an existing pipeline and a construction method thereof, which comprises an interaction well arranged at the intersection of the newly-built rainwater pipeline and the existing pipeline, an opening is arranged on the side wall of the interaction well, the opening is penetrated by the existing pipeline, and a stress compensation space is formed between the opening and the existing pipeline, a sleeve pipe is sleeved outside the pipeline, and a side wall closing element is arranged outside the interaction well to close the opening. The opening with the stress compensation space is arranged on the side wall of the interaction well, the existing pipeline penetrates the well chamber in a non-contact mode, and the load transmission path between the interaction well structure and the existing pipeline is completely cut off. The decoupling design can effectively absorb and isolate the stress generated by the well chamber settlement, construction disturbance and external ground dynamic load, avoid displacement, deformation or cracking of the existing pipeline caused by stress coupling, and ensure the absolute safety of the existing pipeline.