無人駕駛車輛的雷達(dá)傳感

　　傳感器是無人駕駛車輛的關(guān)鍵部件。能夠監(jiān)視車輛前方、后方或側(cè)面的距離，為中央控制器提供重要的數(shù)據(jù)。光學(xué)和紅外攝像機(jī)，激光，超聲波和雷達(dá)都可以用來提供有關(guān)周圍環(huán)境，道路和其他車輛的數(shù)據(jù)。例如，照相機(jī)可以用來檢測道路上的標(biāo)記以使車輛保持在正確的車道上。這已經(jīng)是用來在一個先進(jìn)的駕駛輔助系統(tǒng)（ADAS）提供車道偏離警告。今天的ADAS系統(tǒng)也使用雷達(dá)用于碰撞檢測的警告和自適應(yīng)巡航控制系統(tǒng)，車輛可以跟隨前車。

　　Without the input of a driver， autonomous vehicles require many more sensor systems， often using multiple inputs from different sensors to provider a much higher level of assurance. These sensor systems are adapting from the proven ADAS implementations， although the system architecture is changing to manage the wider range of sensors and the higher data rates.

　　The cost of 24 GHz radar sensors is falling with the increased adoption of the ADAS systems that are used for adaptive cruise control and collision detection. These are now becoming a requirement for carmakers to achieve the highest five star NCAP safety rating in Europe.

　　The BGT24M 24GHz radar sensor from Infineon Technologies， for example， can be used with an external microcontroller in an electronic control unit （ECU） to modify the throttle to maintain a constant distance from the car in front with a range of up to 20 m， as shown in Figure 1