Millimeter Wave Radar for Automotive Blind Spot Detection System

Considering the problem of rearview mirror blind spot during driving, the paper studied and designed the blind spot detection system based on MMW radar. Radar was installed at an appropriate position on the detection target signal by transmitting, when another car enter the detecting area, the small alarm light beside A pillar would shine or alarm few times, to remind drivers careful change road. And the effect would not effect by weather or time. For the radar sensor application environment, triangle wave LFMCW can effectively solve the speed from the coupling phenomenon. The paper showed experimental and simulation data. Introduction Fast, comfortable and safe transportation concept had become the development principle of the field of transportation. The field of transportation had become a carrying artery social development. A variety of means of transport had become a social and economic development of ties [1] . Automobile as the primary means of transport and traffic had become an indispensable part of social life. With the development of China's highways and increasing car ownership, the number of traffic accidents was on the rise. According to the national accident statistics and analytic report [2] , the three aspects of the driver, the vehicle and the road, the driver was the reliability of the worst factors. Driver negligence, drunk driving, speeding, driver fatigue and misjudgments human factors were a direct result of traffic accidents incentives. Another analysis also showed that if the driver was in the 1-2 seconds before the accident, aware of the danger, the vast majority of accidents were avoidable. Therefore, to reduce traffic accidents should strive to improve the reliability of the driver from the start, on the one hand, to strengthen the awareness of road safety with the necessary driver assistance and active collision detection system to improve traffic safety. Blind Spot Detection System Automotive blind spot generated from that left side mirror could supply about 12°view and right side mirror could only supply about 5°view. Inner back mirror could only supply about 20°view. So there were blind spots of 37° blind spot when you're driving. In this case, it would cause fatal car accident if you are changing road and passing car. Blind spot detection (BSD) is a vehicle active safety technology that can detect pedestrians or other vehicles in the vehicle blind spot, and the presence of the driver's risk factors through the alarm, so as to effectively reduce traffic accidents. Get surroundings through the vehicle detection system and target information. Alarm and control in accordance with the evaluation criteria and adjustment requirements. Avoid traffic accidents caused by driver’s fatigue, negligence, misjudgment. The BSD sensors used in the car are mainly laser radar sensors, ultrasonic sensors, infrared and video CCD sensor, millimeter-wave radar sensor. Millimeter-wave frequency is about 30GHz-300GHz wavelength range between 1-10mm, the millimeter waveband between microwave and infrared. Millimeter wave band had a long study, but has not been given sufficient attention. Later, people recognize the infrared and visual systems Advanced Materials Research Vols. 694-697 (2013) pp 1008-1012 Online available since 2013/May/14 at www.scientific.net © (2013) Trans Tech Publications, Switzerland doi:10.4028/www.scientific.net/AMR.694-697.1008