Millimeter-wave time division frequency-modulation shipborne multi-target detection collision-proof radar

Abstract

The invention relates to the technical field of radio positioning radars, in particular to a millimeter-wave time division frequency-modulation shipborne multi-target detection collision-proof radar.A quasi-optical dielectric lens antenna annular array is arranged; a DSP cyclically scans wave beams to omni-directionally guard against a target possibly collided on a water surface; the radar receives / emits reference signals with full-phase-coherence, and adopts time division time sequence asynchronous control; signals of a water photographic sensor, a ship speed sensor and a global positioningsystem (GPS) sensor access an MCU control time division circuit to generate n-path modulation frequency and waveform millimeter-wave linear phase-lock frequency modulation, and are emitted through anR / T2, an optical circulator, a beam switch, and an antenna array; back waves are subjected to processing control in the DSP and the MCU through the antenna array, the beam switch, the optical circulator, an R / T1, a low noise high frequency amplifier, a fourth-harmonic mixer, an intermediate frequency amplifier, a time division circuit, and a multi-target signal related matched filter; and when theradar meets multiple targets, the radar inhibits false-alarm and determines azimuth angles, distances and relative speeds thereof through the DSP, displays three-dimensional images and identifies a target closest to the ship through a CRT, performs the audible and visual alarm if the distance of the target is smaller than a safety distance, intelligently avoids a barrier or reduces speed or brakes if the distance of the target is approximate to a danger distance, and controls and references an actual condition of the water surface to combine the speed of the ship and GPS data to make a choice, thereby obviously improving the sailing safety of the ship.

Description

technical field [0001] The invention relates to the technical field of radio wave transmission and reception to detect target azimuth, distance and speed, in particular to a millimeter-wave time-division frequency modulation marine multi-target detection and anti-collision radar. Background technique [0002] At present, with the rapid development of ocean shipping and inland river and lake shipping and fishery, a large number of ships are increasing, ports and waterways are becoming more and more crowded, and ships are often overloaded and speeding, especially when two or more ships meet, their inertial forces impact and set off large waves , Affecting the course is not easy to operate correctly, causing accidents caused by ships colliding with each other or hitting bridge piers, and in severe cases, the ship sinks or even the bridge collapses. Accidents are more likely to occur during severe storms. Therefore, it is imperative to apply radar anti-collision in ocean shippi...

AI Technical Summary

Problems solved by technology

In addition, simple monitors are difficult to distinguish adjacent targets, cannot display multiple target panoramic images, and lack early warning for relative positions, distances, and moving speeds

Overall structure The existing anti-collision radar lacks the function of using sensor signals to form a closed-loop control, lacks the adaptive control of the antenna in the water environment and the intelligent control of automatic obstacle avoidance, deceleration, and boat braking, and cannot help the driver in time to avoid danger in poor visibility or navigation distress. ACCIDENT

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