2results about How to "Achieve immunity" patented technology

The invention relates to a fire fighting access monitoring method, device and equipment and a storage medium. The method comprises the steps of collecting image data containing color and depth information and passing standard parameters; analyzing the color information, and generating a semantic mask of the channel region and an independent identifier of each occupied object; fusing the semantic mask and the depth information, reconstructing a three-dimensional scene point cloud of the channel, and separating a three-dimensional point cloud cluster of each object; analyzing the point cloud to determine the main direction and key obstacle points of the channel, constructing a dynamic evaluation cross section, and delimiting a standard traffic area; and comprehensively calculating the projection occupation condition of each object on the cross section, and generating a quantitative channel comprehensive availability index and an evaluation result. According to the method, the limitation that in the prior art, only whether occupation or not can be carried out is overcome, real-time and accurate three-dimensional space availability quantitative evaluation on the fire fighting access is achieved, and visual traffic capacity data support can be provided for fire fighting emergency decision making.

This invention belongs to the field of laser technology and discloses a method and system for controlling the working cavity length of an ultra-stable laser system capable of achieving a magic cavity length. The method involves: acquiring the output signal generated by the laser based on the fundamental mode resonance frequency; acquiring the output signal emitted through the working cavity after stimulated emission of the atomic gain medium; performing beat frequency detection on the two output signals to obtain a beat frequency signal; determining the magic cavity length region of the working cavity based on the relationship between the beat frequency signal and the change in the working cavity length; and adjusting the cavity length of the working cavity according to the aforementioned magic cavity length region. The system includes an ultra-stable frequency reference unit for generating a signal based on the fundamental mode resonance frequency; a magic cavity length confirmation unit for determining the magic cavity length region and generating a piezoelectric ceramic adjustment signal; and a working cavity length control unit for adjusting the cavity length of the working cavity. This invention significantly improves the short-term frequency stability and environmental noise immunity of the system, providing a highly promising new path for next-generation optical clocks and precision physical measurements.