2 results about "Rolling code" patented technology

This invention relates to the field of data fusion processing technology, specifically disclosing an ultrasonic water meter anti-theft method based on multi-sensor fusion and multi-level response. This invention achieves comprehensive detection of various water theft behaviors such as magnetic interference, physical damage, and casing deformation through a sensor monitoring network; accurately identifies the type and severity of anomalies through multi-source information fusion and intelligent level judgment; securely protects communication data through encryption authentication and rolling code mechanisms; and implements differentiated handling from record keeping and remote alarm to valve shut-off through a hierarchical linkage response mechanism, effectively improving the comprehensiveness of ultrasonic water meter anti-theft monitoring and the adaptability of response handling.

The application relates to the technical field of wireless communication, in particular to a proprietary airspace unmanned aerial vehicle management and control system and method based on communication link intervention. The method comprises the following steps: capturing an unmanned aerial vehicle radio frequency signal through spectrum sensing, extracting physical layer features such as in-phase quadrature components and entropy values, and constructing a multi-dimensional time sequence vector representing communication state changes; inputting the feature sequence into an LSTM unsupervised protocol syntax inference model, learning inter-frame dependence and state transition, and outputting a dynamic protocol syntax tree; constructing a reinforcement learning action space based on the syntax tree, searching for authentication and encryption verification fragile states by injecting a perturbation probe packet; combining a rolling code to observe and predict subsequent code values and calibrate a timestamp and a check bit, sending a takeover frame in a receiving window period, taking over an original remote control link and establishing a unique control channel; issuing a virtual geographic fence and navigation correction, planning an obstacle avoidance path in combination with a three-dimensional potential field, and guiding the unmanned aerial vehicle to safely land.