Millimeter wave random code phase modulation amplitude modulation marine anti-collision radar

Abstract

The invention relates to the technical field of radio positioning, and relates to a marine anti-collision radar with a millimeter-wave random code, phase modulation and amplitude modulation. Set up the ring array of optical medium lens antenna, and the DSP circularly scans the beam to warn the target of possible collision on the water surface in all directions. A broadband noise source generates two random code generators. Random code generator B symbol amplitude modulation, receiving / transmitting conversion and trailing edge detection, double random code radio frequency up-conversion, R / T3, frequency multiplication and power amplifier, R / T2, isolator, antenna transmission, echo through antenna array , beam switch, isolator, R / T1, high amplifier, down-conversion, intermediate amplifier, random sequence asynchronous gate, digital intermediate frequency quadrature detector I / Q, digital pulse pressure correlator to DSP and MCU processing control, The radar operates with multiple adjacent ships without interfering with each other, and has high environmental electromagnetic compatibility EMC. DSP suppresses false alarms to determine target azimuth, distance and relative speed. CRT displays three-dimensional images to identify the closest target to the ship. Sound and light alarm for less than the safe distance, intelligent obstacle avoidance or deceleration when approaching the dangerous distance, significantly improving navigation safety.

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 marine anti-collision radar with millimeter wave random code phase modulation and amplitude modulation. 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, it is not easy to operate correctly, causing ships to collide with each other or hit bridge piers, and in severe cases, the ship sinks, and even the bridge collapses. In severe weather such as storms, the probability of accidents is greater. Therefore, the application of radar collision avoidance to ensure navigatio...

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 of relative positions, distances, and moving speeds

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, lacks the intelligent control of automatic obstacle avoidance, deceleration and braking, and cannot help the driver in time to avoid accidents in case of poor visibility or navigation distress

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