Millimeter-wave time-division random code phase modulation multichannel colliding-proof radar for car

Abstract

The invention relates to the technical field of radio fix, in particular to a millimetre wave time-division random code phase modulation multi-passage automobile anti-collision radar. The radar of the invention is provided with a time-division and time-sequence asynchronous control to receive / emit signal, and a 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, the vehicle speed sensing and satellite positioning GPS data MCU control time-division n-passage random code millimetre wave phase modulation; emission is carried out sequentially by upper frequency conversion, R / T3, frequency doubling and power amplification, 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 extracts the multi-passage signal DSP which is processed and controlled by MCU; the driving of multi-automobile of adjacent lanes is not disturbed by each other and can be completed simultaneously; the high-performance environment electromagnetic compatible EMC is provided; when a plurality of road barriers are encountered, the orientation, distance and relative speed are determined by DSP restriction virtual warning; three-dimensional panoramic 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 recognized; 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.

Description

technical field [0001] The invention relates to the technical field of radio wave transmitting and receiving to detect the azimuth, distance and speed of a target, in particular to a millimeter wave time-division random code phase modulation multi-channel automobile anti-collision radar. Background technique [0002] At present, a large number of cars and other motor vehicles have increased people’s travel convenience, and at the same time, the roads are crowded and overloaded. Inadequate driving experience or lack of driving experience is a safety hazard. Traffic accidents occur frequently, resulting in a large number of casualties and heavy property losses, and have become a serious social problem in the world. The United States, Europe, Japan and other countries have invested a lot of manpower and material resources to develop advanced anti-collision radars. Due to the harsh working environment and conditions of automobile anti-collision radar, the collision avoidance pro...

AI Technical Summary

Problems solved by technology

Reflective antennas are expensive, slow in scanning speed, poor in anti-vibration and dust resistance, and affect the appearance and aerodynamics of the car, while the microstrip antenna has a large loss at millimeter wave frequencies

The simple radar display lacks panoramic information images, and the relative position, distance and moving speed of adjacent multiple targets cannot be accurately warned

Pulse radar emits pulse width to block the echo, there is a blind distance, and it is difficult to avoid collisions at close range. When driving on the highway, there is a lack of rear-view warning, and many cars often collide with each other.

Existing automotive anti-collision radars lack closed-loop control using sensor signals, lack adaptive control of road environment antennas and intelligent control of obstacle avoidance, deceleration and braking, and cannot help drivers in time to avoid accidents in poor visibility or in distress situations.

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