To solve this problem , quick range measurement technology was researched based on the method of propagation delay and working principle of cpld . a time measurement circuit with an accuracy of ? 0 . 2m was designed and accomplished . it could finish the whole measurement process in 80ns after the bounced pulse was received 針對(duì)該問題,基于傳遞延時(shí)插入法和cpld的工作原理,對(duì)快速測(cè)距技術(shù)進(jìn)行了研究,研制了一種能實(shí)現(xiàn)收到回波脈沖后80ns內(nèi)完成測(cè)距,測(cè)距精度0 . 2m的計(jì)時(shí)電路,并將該電路集成于一片可編程邏輯器件中,減小了電路面積和功耗,增強(qiáng)了抗干擾能力。