6results about How to "Accurate discovery" patented technology

This invention provides a method for identifying low-speed, small targets using radar echoes based on optical flow. The method includes receiving radar echo data in real time and redrawing the images to form a series of multi-frame radar echo images; using the pyramid LK optical flow method, sequentially performing layered analysis on the formed multi-frame radar echo images to obtain the optical flow vector of each frame; comparing the optical flow vectors of each frame to determine dynamic and static targets in each frame; and based on the dynamic and static target identification results fed back by the radar, determining whether one or more dynamic targets in each frame have not been identified by the radar. If so, the unidentified dynamic targets in each frame are considered low-speed, small targets before being acquired. Implementing this invention solves the problem of insufficient radar detection capability for low-speed, small targets and improves target acquisition efficiency.

This invention provides a method and apparatus for event detection in a video surveillance system. The method includes: acquiring core process information of each primary and backup server in the video surveillance system, wherein the primary and backup servers include a primary server and a backup server with a redundant backup relationship with the primary server; determining whether a primary / backup switchover event exists for each of the primary and backup servers in the video surveillance system based on the core process information at the previous moment and the core process information at the current moment; and generating a corresponding event detection result based on the primary / backup server where the switchover event occurred if there is a primary / backup server in the video surveillance system. This invention effectively solves the problem of low efficiency in manual event detection and can detect primary / backup switchover events more promptly and accurately.

The application belongs to the technical field of geotechnical engineering construction, and specifically provides a disordered high fill site pre-ramming and humidification and dynamic compaction combined construction method, which comprises the following steps: 1) detecting cracks and cavities in the target site; 2) pre-ramming to eliminate cracks and cavities in the target site; 3) water injection and humidification of the target site after pre-ramming; and 4) dynamic compaction construction of the humidified target site until the requirements are met. The application solves the problems of uneven humidification and poor reinforcement effect in the existing dynamic compaction foundation treatment of disordered high fill soil sites, avoids the problem of uneven water injection and humidification caused by uneven upper and lower strata, and has the characteristics of good treatment effect, fast construction speed and small residual settlement.

This invention relates to the field of measurement and provides a shoe sole measuring mechanism, including a chassis frame and a lifting rod. A slide rail is mounted on the top surface of the chassis frame, and a baffle is also mounted on the chassis frame. A push plate is mounted on the slide rail. A slider that moves vertically is mounted on the lifting rod, and a groove is provided on the baffle. The baffle has a first scale, and the chassis frame has a second scale. The slide rail drives the push plate to move, and in conjunction with the data on the second scale, the length of the shoe sole is obtained. Then, by adjusting the lifting rod, the slider's horizontal height is changed, and in conjunction with the first scale, the height of the forefoot tilt of the shoe sole is obtained. This acquisition of key shoe sole data allows for the determination of whether there are errors in the shoe sole produced by the mold, achieving the purpose of inspection. Simultaneously, the shoe sole measuring mechanism has high flexibility, can adapt to different shoe sole models for measurement, and obtains accurate measurement data, solving the problem of cumbersome manual or simple tool measurements.

The invention discloses an electric drive system NVH dynamic test system and method based on XIL. The system comprises a driver-in-the-loop module, a real object-in-the-loop module and an NVH data acquisition system. The driver in-the-loop module is used for collecting a driver real-time operation signal and providing a virtual driving environment; the real object in-the-loop module receives a signal through a real-time simulation machine, and a co-simulation model is used for resolving vehicle dynamic operation parameters; and the rack system drives the dynamometer to apply a dynamic load to the tested electric driving system by adopting a composite control framework based on rotating speed closed-loop control and combined with dynamic compensation according to the parameters. By constructing a human-vehicle-road closed-loop coupling mechanism, the problem that transient load change in a complex driving scene cannot be reproduced in a traditional rack test is solved, working conditions such as urgent acceleration and braking can be simulated in a high-fidelity manner, vibration and noise response of an electric driving system in real dynamic operation can be accurately captured, and the reliability of the electric driving system is improved. And the authenticity and the effectiveness of the NVH test are obviously improved.

The utility model relates to the technical field of energy storage, and specifically provides a heat management system for battery pack and energy storage system, aims at solving the problem of high energy consumption of the existing heat management system and leading to poor heat management effect. The heat management system of the application heat management system includes phase change heat pipe assembly, liquid storage component and spraying mechanism, the first heat exchange end of phase change heat pipe assembly is adjacent to the setting with battery pack and is used for heat exchange with battery pack, the liquid storage cavity of liquid storage component stores cooling liquid, at least a part of the second heat exchange end of phase change heat pipe assembly is soaked in cooling liquid, when the thermal runaway of battery pack occurs, the spraying mechanism can spray the cooling liquid in the liquid storage cavity to battery pack. The application can not only exchange heat between the cooling liquid in the liquid storage cavity and the second heat exchange end, thereby facilitating the heat management of battery pack, but also spray the cooling liquid to battery pack when the thermal runaway of battery pack occurs, without using both reducing energy consumption and improving safety.