5results 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.

The invention discloses an unmanned edge device cluster anti-interference collaborative obstacle avoidance system and method based on identity verification and secret state interaction, and introduces dynamic structure homomorphic encryption DSHE and a lightweight identity-based encryption mechanism to solve the problems that encryption and decryption delay is high and the system is easily attacked by man-in-the-middle in the prior art. A lightweight encryption microchip LCMC is deployed in the system, and a dynamic structure homomorphic encryption DSHE arithmetic unit, an identity management unit and a decision arbitration unit DAU are integrated; the proxy auxiliary square operation protocol realizes relative measurement calculation of a ciphertext domain space through a pre-calculation lookup table; the identity preprocessor maps the identity label into an evaluation key and realizes ciphertext identity binding; according to the layered noise management strategy, operation is divided into three layers to implement differential control; a single-node top-speed self-decision mechanism triggers a special decryption accelerator DDA, hardware interruption is generated to directly take over an edge control unit, and the end-to-end obstacle avoidance response delay is less than 3 milliseconds.

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.

The invention relates to the technical field of vehicle energy recovery, in particular to a braking energy recovery method and system based on energy conversion, and the method comprises the following steps: carrying out energy recovery state judgment based on a current battery energy storage state value to obtain a current energy recovery state; if yes, emergency degree analysis is conducted on the target running vehicle through the current braking strength and the current running speed, the current braking emergency degree is obtained, recovery braking force and mechanical braking force are obtained according to the current braking emergency degree, braking force distribution is conducted according to the recovery braking force and the mechanical braking force, and a target braking vehicle is obtained; otherwise, direct mechanical braking force is obtained, braking force distribution is conducted through the direct mechanical braking force, and the target braking vehicle is obtained. According to the invention, the adaptability and safety of the energy recovery system in different environments and driving scenes can be improved, and the energy recovery efficiency is enhanced.