摘? 要: 介紹了一套最新研制的功率計(jì)" title="功率計(jì)">功率計(jì)" title="光功率" title="光功率">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" 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title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)" title="光功率計(jì)">光功率計(jì)">光功率計(jì)自動(dòng)測(cè)試系統(tǒng),，該系統(tǒng)充分利用了計(jì)算機(jī)的現(xiàn)有資源,，具有投資省,、自動(dòng)化程度高等特點(diǎn),。對(duì)于利用計(jì)算機(jī)進(jìn)行數(shù)據(jù)采樣、實(shí)時(shí)通信,、自動(dòng)控制等應(yīng)用具有一定的參考價(jià)值,。

　　關(guān)鍵詞: 光開(kāi)關(guān)" title="光開(kāi)關(guān)">光開(kāi)關(guān)? 接口技術(shù)? 自動(dòng)測(cè)試?

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　　光功率計(jì)是現(xiàn)代光通信中最基本的光纖測(cè)試儀器。隨著寬帶通信技術(shù)的快速發(fā)展,，通信網(wǎng)絡(luò)中大量使用光纖作為傳輸介質(zhì),，因此光功率計(jì)也就越來(lái)越多地被應(yīng)用于科研、生產(chǎn)的各個(gè)部門(mén),。對(duì)于計(jì)量檢測(cè)部門(mén)而言,，每年都要計(jì)量大量的光功率計(jì)，然而傳統(tǒng)的計(jì)量方法耗時(shí)長(zhǎng),、效率低,，計(jì)量的準(zhǔn)確性也極易受人為操作的影響。在這里我們介紹一套最新研制的光功率計(jì)自動(dòng)測(cè)試系統(tǒng),，具有測(cè)試準(zhǔn)確性高,、投資省、自動(dòng)化程度高等特點(diǎn),。

1 傳統(tǒng)光功率計(jì)的測(cè)試方法

　　傳統(tǒng)的光功率計(jì)測(cè)試框圖如圖1所示,。

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　　所用測(cè)試原理為比較法。首先將光衰減器" title="衰減器">衰減器與標(biāo)準(zhǔn)光功率計(jì)連接起來(lái),，測(cè)試光從光源發(fā)出,，經(jīng)過(guò)衰減器后被標(biāo)準(zhǔn)光功率計(jì)讀出的數(shù)值為標(biāo)稱(chēng)值。接著將光纖從標(biāo)準(zhǔn)光功率計(jì)上取下切換到待測(cè)光功率計(jì)上,，再測(cè)量待測(cè)光功率計(jì)讀出的數(shù)值,，該值為實(shí)測(cè)值,。測(cè)試完第一個(gè)光功率下的數(shù)值后，調(diào)節(jié)光衰減器使輸出光功率為下一值,，重復(fù)以上步驟進(jìn)行下一次測(cè)試,。待所有光功率量程都測(cè)完后，通過(guò)計(jì)算待測(cè)光功率計(jì)的相對(duì)誤差對(duì)其進(jìn)行標(biāo)定,。計(jì)量評(píng)定標(biāo)準(zhǔn)是:相對(duì)誤差在±10%以?xún)?nèi),，待測(cè)光功率計(jì)標(biāo)定為合格，超過(guò)這一范圍則為限用,，需重新校準(zhǔn)后才能使用,。

　　測(cè)試時(shí)必須注意兩點(diǎn):①用光纖連接光器件時(shí)，盡量旋緊光接頭以避免由于接入損耗而降低測(cè)量的準(zhǔn)確性;②為了將測(cè)試誤差降至最低,，在每一次光功率的測(cè)試過(guò)程中,，需采用平均值測(cè)試法，即在相同光功率下進(jìn)行多次的重復(fù)測(cè)試,，然后去掉一個(gè)最大值和一個(gè)最小值,，再將其它數(shù)值取平均即為該光功率下最終的測(cè)試數(shù)值。

　　采用以上方法進(jìn)行實(shí)際測(cè)試時(shí),，調(diào)節(jié)光衰減器,、切換光纖、記錄測(cè)試數(shù)據(jù),、計(jì)算相對(duì)誤差等均需手工完成,，工作效率低下。在測(cè)試過(guò)程中由于不斷地進(jìn)行光纖的切換工作,，使得接入損耗嚴(yán)重影響測(cè)試的準(zhǔn)確性,。雖然測(cè)試人員可以旋緊光接頭以降低接入損耗，但由于光信號(hào)本身非常弱,，將光纖反復(fù)多次地插入和拔出,，會(huì)造成接入損耗有很大不同,，直接降低測(cè)試的準(zhǔn)確性,。

　　經(jīng)過(guò)以上分析發(fā)現(xiàn)，造成工作效率低下和測(cè)試準(zhǔn)確性低的主要原因是由于所有的測(cè)試工作均需人工完成,。解決這一問(wèn)題的最好辦法就是采用計(jì)算機(jī)進(jìn)行自動(dòng)化測(cè)試,。新的自動(dòng)測(cè)試系統(tǒng)框圖如圖2所示。

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2 自動(dòng)測(cè)試系統(tǒng)硬件設(shè)計(jì)

　　使用計(jì)算機(jī)進(jìn)行自動(dòng)控制時(shí),，在滿(mǎn)足功能的前提下應(yīng)該最大限度地利用計(jì)算機(jī)現(xiàn)有的資源,。這樣，一方面可以充分發(fā)揮計(jì)算機(jī)的作用,，另一方面也可以節(jié)省另外制作控制板卡所需的資金,、器材,、時(shí)間和人力。

　　在這套自動(dòng)測(cè)試系統(tǒng)中,，光衰減器帶有串行接口,，可直接與計(jì)算機(jī)通信。待測(cè)光功率計(jì)中,，較新的帶有串行接口和GPIB接口,，老一些的只有GPIB接口。為了滿(mǎn)足兼容性和自動(dòng)控制的要求,，增加了一塊基于計(jì)算機(jī)總線(xiàn)的GPIB接口卡,，通過(guò)該卡控制待測(cè)光功率計(jì)。標(biāo)準(zhǔn)光功率計(jì)自帶串行和GPIB兩種接口,，可通過(guò)任意一個(gè)接口與計(jì)算機(jī)通信,。由于計(jì)算機(jī)上有兩個(gè)串行接口，因此可分別通過(guò)這兩個(gè)接口控制光衰減器和標(biāo)準(zhǔn)光功率計(jì),。為了解決接入損耗問(wèn)題,，系統(tǒng)增加了一個(gè)1×2的光開(kāi)關(guān)。光開(kāi)關(guān)的作用就是在計(jì)算機(jī)的控制下,，自動(dòng)切換光纖,，將接入損耗的影響降至最低，類(lèi)似于電子開(kāi)關(guān)在電路切換中所起的作用,。我們利用計(jì)算機(jī)的并行接口對(duì)光開(kāi)關(guān)進(jìn)行控制,。

　　光開(kāi)關(guān)采用電壓控制方式，需自制一塊控制卡,，利用計(jì)算機(jī)的并行接口進(jìn)行控制,。控制卡的電路如圖3所示,。

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　　光開(kāi)關(guān)由計(jì)算機(jī)的并口發(fā)控制信號(hào)進(jìn)行驅(qū)動(dòng),，即從計(jì)算機(jī)并口378H的“0”、“1”兩端發(fā)送高低電平信號(hào),，使得控制電路A,、B兩端的電壓交替變化，達(dá)到光開(kāi)關(guān)自動(dòng)動(dòng)作的目的,。當(dāng)“0”端為高電位時(shí),，三極管Q3、Q4導(dǎo)通,，Q1,、Q2截止;同時(shí)“1”端為低電位，Q5、Q6導(dǎo)通,，Q7,、Q8截止，這樣就構(gòu)成了導(dǎo)通回路+12V→Q6→B→A→Q3→GND,，則光開(kāi)關(guān)向右運(yùn)動(dòng),。同理，“0”端為低電位而“1”端為高電位時(shí),，光開(kāi)關(guān)向左運(yùn)動(dòng),。二極管D1~D4為保護(hù)二極管，可避免光開(kāi)關(guān)中的感性元件在極性切換時(shí)造成反向電壓而損壞功率三極管,。

3 自動(dòng)測(cè)試系統(tǒng)軟件設(shè)計(jì)

　　自動(dòng)測(cè)試系統(tǒng)軟件由系統(tǒng)自檢,、硬件控制、測(cè)試數(shù)據(jù)記錄及計(jì)算,、測(cè)試結(jié)果輸出等部分組成,，其中最為關(guān)鍵的是硬件控制部分的程序。下面重點(diǎn)介紹一下該部分的并,、串口控制程序以及GPIB接口程序的編寫(xiě)方法,。這些程序全部采用C++ Builder(簡(jiǎn)稱(chēng)BCB)編寫(xiě)，運(yùn)行在WIN9x操作系統(tǒng)下,。

3.1 光開(kāi)關(guān)控制程序設(shè)計(jì)

　　光開(kāi)關(guān)的控制程序采用直接嵌入?yún)R編語(yǔ)句的方法實(shí)現(xiàn),，程序如下:

　　void outportb(unsigned short port，unsigned char value)

??? //port參數(shù)為輸出端口地址,，value參數(shù)為輸出值

????{

??????? asm{

??????????? mov dx,， port?? 　　//把端口port地址送到DX寄存器中

??????????? mov al， value? 　　//把value的數(shù)值送到AL寄存器中

??????????? out dx,， al???????? //把AL寄存器中的數(shù)值送到端口

　????????? },；

??? }

　　光開(kāi)關(guān)的控制程序如下:

　　#define? PC 0x378??????????//PC機(jī)的并口地址

　　void_fastcall TForm2：：BitBtn_Left2RightClick(TObject *Sender)

??? {

　　outportb(PC，0x01),；?????? // 378H的“0”端為高電位,，“1”端為低電位，光開(kāi)關(guān)向右運(yùn)動(dòng)?

??? }?

　　void_fastcall TForm2：：BitBtn_Right2LeftClick(TObject *Sender)

??? {

　　outportb(PC,，0x02),；?? 　　// 378H的“0”端為低電位，“1”端為高電位,，光開(kāi)關(guān)向左運(yùn)動(dòng)?

????}

　　采用以上方式編制的程序可以非常方便地對(duì)原有的采用匯編語(yǔ)句編制的函數(shù)直接進(jìn)行使用,，不需再另外編制相應(yīng)的程序。

3.2 串行接口程序設(shè)計(jì)

　　我們使用Microsoft的MSComm32.ocx控件來(lái)編寫(xiě)串行通信程序,。首先要進(jìn)行串口初始化，程序如下:

　　{

　　……

　　Mscomm1→CommPort=1；????? 　　//選用COM1串行口

　　Mscomm1→Settings=″9600,，N,，8，1″,；??

　　//波特率9600,，無(wú)奇偶校驗(yàn)位，8位數(shù)據(jù)位,，1位停止位

　　Mscomm1→InputLen=0????? 　　　//讀取接收緩沖區(qū)的全部?jī)?nèi)容

　　Mscomm1→InBufferSize=1024 　　//設(shè)置接收緩沖區(qū)的字節(jié)長(zhǎng)度為1024

　　Mscomm1→PortOpen=True??? 　　 //打開(kāi)串行口

　　……

　　}

　　串口初始化后就可以利用Input函數(shù)讀取標(biāo)準(zhǔn)光功率計(jì)的讀數(shù)了,。通過(guò)串口1讀取標(biāo)準(zhǔn)光功率計(jì)讀數(shù)的程序如下:

　　{

　　　　double? buffer[1024]；????? //定義接收數(shù)據(jù)的緩沖區(qū)

　　　　int? ByteNum,；?????? ?????? //收到的字節(jié)數(shù)

　　　　int? BuffPtr,；???????? ???? //接收緩沖區(qū)的指針

　　　　OleVariant? RxBuff；????????//一個(gè)用于接收的OleVariant變量

　　……

　　if(MSComm1→InBuffCount>0)? //如果緩沖區(qū)有多于一個(gè)字節(jié)的數(shù)據(jù)則接收

??????? {

??????? RxBuff=Communica1->Input,；?????????

??????? ByteNum=RxBuff.ArrayHighBound(1),； //將實(shí)際的字節(jié)數(shù)取出

　　??????? for(int i=0；i<=ByteNum,；i++)

??????????? buffer[BuffPtr++]=(double)RxBuff.GetElement(i),；

????　　　　　　　　　　???????????????? ?//將接收到數(shù)據(jù)讀入緩沖區(qū)

????????　　}

　　　　……

　　}

　　光衰減器的自動(dòng)控制程序與此類(lèi)似，本文不再?gòu)?fù)述,。

3.3 GPIB接口程序設(shè)計(jì)

　　GPIB接口程序是使用NI公司的ActiveX控件編制的,，方法如下:

　　打開(kāi)BCB的ActiveX控件組，將GPIB控件拖放到Form上,，在“Object Inspector”表框中對(duì)通信的時(shí)間間隔,、目標(biāo)地址、起始位,、校驗(yàn)位,、存放數(shù)據(jù)的緩沖區(qū)大小等進(jìn)行設(shè)置。

　　完成了以上設(shè)置后,，在程序中只要加上不多的幾行代碼即可實(shí)現(xiàn)待測(cè)光功率計(jì)的自動(dòng)數(shù)值采樣,。程序代碼如下:

　　{

　　　　……

　　　　double? number;

　　　　Form2→CWGPIB1→Configure()； //初始化GPIB接口卡

　　　　……

　　　　number=Form2→CWGPIB1→Read (),；?? //自動(dòng)讀取待測(cè)光功率計(jì)的讀數(shù)

　　　　……

????}

4 自動(dòng)測(cè)試結(jié)果

　　利用以上自動(dòng)測(cè)試系統(tǒng)測(cè)出的某一待測(cè)光功率計(jì)的計(jì)量標(biāo)定參數(shù)如表1所示,。?

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　　從以上測(cè)試數(shù)據(jù)來(lái)看，該待測(cè)光功率計(jì)在1.3μm測(cè)試波長(zhǎng)下,，mW,、μW量程為合格，而nW量程為限用,，必須重新校準(zhǔn)后才能使用,，或僅用于指示光纖中有無(wú)光功率的一般性使用,。

　　在這套光功率計(jì)自動(dòng)測(cè)試系統(tǒng)中，測(cè)試軟件采用圖形化操作界面,，每一步的操作都有直觀(guān)的提示,，可使測(cè)試人員在很短的時(shí)間內(nèi)掌握系統(tǒng)的使用方法。測(cè)試時(shí),，測(cè)試人員只要將整個(gè)測(cè)試系統(tǒng)連接起來(lái),，然后正確地使用測(cè)試軟件即可，其它的操作,，如光衰減器的調(diào)節(jié),、光纖的切換、測(cè)試數(shù)據(jù)的輸入與計(jì)算,，以及最終測(cè)試結(jié)果的輸出全部由計(jì)算機(jī)完成,。這使得整個(gè)測(cè)試工作的準(zhǔn)確性和靈活性都得到了加強(qiáng)，工作效率大為提高,，也極大地增強(qiáng)了測(cè)試的自動(dòng)化水平和使用檔次,。

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參考文獻(xiàn)

1 EXFO PM-1100型光功率計(jì)用戶(hù)手冊(cè)[M].加拿大EXPO公司，1997

2 NI-488.2 User Manual for Windows[M]. National Instruments Corporation,，1998

3 FlUCK AT900型可調(diào)諧光濾波器使用手冊(cè)[M].美國(guó)FLUCK,，1999

4 徐新華. C++ Builder 4 編程指南[M]. 北京：人民郵電出版社，1997.10

5 姜 勇.微型PC機(jī)接口技術(shù)[M]. 西安：西北工業(yè)大學(xué)出版社,，1996.4