based on the model of safe following distance, the design blue print of system is presented in the text . using the multiple impulses horae rotate speed sensor to measure the vehicle speed and nanometer radar to measure the distance of own vehicle to frontal vehicle, and analyzing and judging collected information by at89c51 which is the control centre of the system 本文在安全跟車模型的基礎(chǔ)上,提出了系統(tǒng)方案:采用霍爾多脈沖轉(zhuǎn)速傳感器測(cè)量汽車的速度,毫米波雷達(dá)測(cè)量兩車的距離和相對(duì)速度,利用at89c51作為信息采集單元的控制中心,對(duì)各種信息進(jìn)行分析判斷,當(dāng)行車距離小于報(bào)警距離時(shí)啟動(dòng)相關(guān)的報(bào)警單元。