Millimeter-wave time-division linear frequency modulation multiple-target detection colliding-proof radar for car

Abstract

The invention relates to the technical field of radio fix radars, in particular to a millimetre wave time-division linear frequency modulation multi-object detection automobile anti-collision radar. The radar of the invention adopts full phase parameter receiving/emitting benchmark signal and time-division and time-sequence asynchronous control to receive/emit a dual-purpose quasi-light integrated medium lens antenna array, and scans the objects possible to be collided on the warning road surfaces by DSP according to lane scanning wave beam; the road situation photographing combined with the vehicle speed and GPS data MCU to control time-division n-passage modulation frequency and waveform millimetre wave linear locking phase frequency modulation; emission is carried out sequentially by R/T2, a circulator, a wave beam switch and the antenna array; echo passes through the antenna array, the wave beam switch, the circulator, the R/T1, low noise high amplifier, subharmonic mixing, middle amplifier and a time-dividing circuit and multi-object signal corresponding matching filter wave and is processed and controlled by MCU at DSP; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional images are displayed by a CRT; the closer the distance of the object is, the higher the resolution is; the object which is closest to the vehicle is recognised; sound and light alarm are carried out when the distance is less than safety distance; when the distance is near to the dangerous distance, the vehicle can intelligently avoid the barrier or reduce the speed or brake; the radar of the invention can make a choice according to the control reference road situation, the vehicle speed and the GPS data, thus obviously improving the driving safety of the vehicle.

Description

Technical field [0001] The invention relates to the technical field of radio wave transmission and reception to detect target orientation, distance and speed, specifically a millimeter wave time-division linear frequency modulation multi-target detection automobile anti-collision radar. Background technique [0002] At present, there are a large number of cars and other motor vehicles, roads are congested and overloaded, and car accidents occur frequently, causing a large number of casualties and heavy property losses. It has become a serious social problem around the world. The United States, Europe, Japan and other countries have invested a lot of manpower and material resources in research and development. Advanced anti-collision radar. Since the working environment and conditions of automobile anti-collision radar are very harsh, the collision avoidance process of fast-moving vehicles is extremely short, less than one second. The technical requirements are very high, and ...

AI Technical Summary

Problems solved by technology

[0002] At present, a large number of automobiles and other motor vehicles are increasing, roads are crowded and overloaded, and traffic accidents occur frequently, causing a large number of casualties and major property losses, which have become serious social problems all over the world. Advanced anti-collision radar, due to the harsh working environment and conditions of automobile anti-collision radar, the time for fast-moving vehicles to avoid collision is extremely short, less than one second, the technical requirements are very high, and there are many problems to be solved

The antenna uses a horn structure with insufficient horizontal angle resolution, which is even worse when the road is curved. The reflective antenna has a slow sweep speed, anti-vibration, dustproof, and poor corrosion resistance. The failure rate is high and affects the appearance and aerodynamics of the car. Microstrip antenna mm Wave frequency loss is large

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