7results about How to "Guaranteed Detection Performance" patented technology

This invention relates to a beamforming method for an integrated communication and sensing system assisted by an intelligent reflective surface, belonging to the field of wireless communication technology. The method first synthesizes multiple beams for multiple communication users and radar targets using spatial degrees of freedom, based on the transmit beamforming design requirements. Then, by jointly optimizing the transmit beamforming of the base station and the phase shift matrix of the RIS (Radio Response System), the beamforming design method is expressed as a constrained optimization problem for solution. Under the constraints of signal leakage-to-noise ratio and RIS phase shift, the performance of MIMO radar transmit beamforming is maximized. Finally, the solution is obtained through an alternating iterative optimization method. The joint beamforming method of this invention is simple to implement, has a wide range of applications, and can improve the spectral efficiency of integrated communication and sensing systems.

The invention belongs to the technical field of infrared thermal imaging, and particularly relates to a refrigeration type medium-wave infrared thermal imaging system, which analyzes the real-time working load of an infrared detector through a detection load sensing unit, outputs a load analysis result, and calculates the real-time working load of the infrared detector through a refrigeration parameter calculation unit based on the load analysis result. The optimal refrigeration temperature and refrigeration power are calculated, refrigeration parameters are output, finally, refrigeration work is started based on the refrigeration parameters through an accurate refrigeration unit of the Stirling refrigerator, meanwhile, the actual temperature of the detector is monitored in real time, and temperature data are output; on the basis, the real-time working load and the environment temperature of the detector are dynamically matched through the refrigeration temperature control module, precise refrigeration according to needs is achieved, the problem of high power consumption caused by the fixed refrigeration temperature is avoided, and it can be ensured that the detector is in the optimal low-temperature environment under different loads so that the detection performance can be guaranteed.

The invention provides a low-orbit radar satellite constellation cooperative frequency hopping anti-interference method and system, and the method comprises the steps that a ground control center generates a global frequency hopping time-frequency distribution table based on the future orbit forecast data of a constellation; the satellite monitors an interference signal in real time, and initiates local negotiation with a master control satellite through an inter-satellite link when an unforeseen interference source or task change is detected; based on the negotiation result, selecting a frequency band in the reserved frequency resource table and sending the frequency band to the interfered satellite; a satellite receives interference type signals, positions the interference type signals and analyzes the characteristics of the interference signals, historical interference data are collected, part of frequency resources are reserved to serve as anti-interference special frequency bands, constellation overall anti-interference performance indexes are evaluated regularly, and pre-planning parameters of the next round are optimized. Through combination of centralized pre-planning and on-satellite dynamic adjustment, the problems of poor dynamic adaptability, low cooperation efficiency and the like in the prior art are solved, and the anti-interference capability and the spectrum resource utilization rate of a low-orbit radar satellite constellation in a complex electromagnetic environment are improved.

The application discloses a frequency range determination method, a computer device and a computer readable storage medium, and belongs to the field of signal processing. The method comprises the following steps: acquiring a signal quality parameter of a medium frequency signal; determining a section with high antenna gain according to the acquired signal quality parameter, so as to determine a target frequency range. The application solves the problem that the sweep frequency bandwidth does not match the antenna bandwidth by adaptively adjusting a sweep frequency control signal, and improves the detection capability of the radar.

This invention relates to the field of underwater robot technology, specifically an auxiliary power unit for an underwater robot and the underwater robot itself. The underwater robot comprises a main body, which includes a main cabin and a control unit. The auxiliary power unit includes a power mechanism and a release mechanism. The power mechanism includes a first cabin, a communication unit, a propulsion unit, and a battery pack. The communication unit is communicatively connected to the control unit; the propulsion unit is located outside the first cabin and is communicatively connected to the control unit; the battery pack supplies power to the propulsion unit and the communication unit; the release mechanism includes a fixed unit, a detachable unit, and a release module. The first side of the fixed unit is fixedly connected to the outer wall of the first cabin; the first end of the detachable unit is detachably connected to the second side of the fixed unit, and the second end of the detachable unit is detachably connected to the outer wall of the main cabin; the release module is connected to the control unit and fixedly connected to the fixed unit. This auxiliary power unit can provide the underwater robot with extended endurance.

The application provides a photon detection method, device and laser radar for a full solid-state laser radar, the method comprising: calibrating a SPAD array, determining SPAD units included in a photosensitive pixel corresponding to each light spot or light strip emitted in a laser, and recording the SPAD units as an initial opening region; opening the SPAD units of the initial opening region to detect a target; obtaining histogram data output by the opened SPAD units; adaptively adjusting the position of the SPAD units opened next time according to the histogram data, when the signal-to-noise ratio in the histogram data of the SPAD units opened next time meets a set value, the SPAD units opened next time are required SPAD units; and calculating distance information of the target according to the histogram data output by the required SPAD units. Through region calibration of the SPAD array, the opening position of the SPAD units is adaptively adjusted based on the signal-to-noise ratio for photon reception at each exposure, which ensures the detection effect while effectively reducing the detection power consumption and data volume.

The utility model discloses a kind of detection support of engineering geology detection, belong to detection support technical field, mainly for engineering geology detection.The technical problem to be solved by the utility model is to provide a kind of detection support of engineering geology detection, including the bottom plate of bottom roller, the bracket is equipped on bottom plate, the mounting sleeve with connecting rod in inside is equipped on bracket, first motor is equipped at the one end of connecting rod that extends mounting sleeve, first motor output end is located with connecting rod in same straight line and is fixed with second housing, second motor is equipped in second housing, second motor output end is perpendicular to the straight line of first motor output end and is equipped with swing arm, swing arm is equipped with the mounting plate of geological radar that has been installed, battery box is equipped at the top of mounting sleeve;Second housing is rotated by first motor, second motor drives swing arm to rotate, to adjust the position of geological radar according to different topography, ensure that geological radar is always oriented ground and parallel to horizontal plane, ensure detection effect.