The process of fitting sensor ' s output curve with genetic algorithm is studied . the accuracy error of experiments using this signal processing method is less than 0 . 2mm . in the first chapter : the state - of - the - arts of stroke measuring technique used cylinder summarized 設(shè)計了信號處理單片機(jī)系統(tǒng),編制了信號處理軟件,制作了磁性標(biāo)尺和傳感磁路結(jié)構(gòu),進(jìn)行了實(shí)驗,結(jié)果證明,所研究的各項技術(shù)是可行的。