提出一種只用三個(gè)傳感頭、一套光路、一套信號(hào)處理部分實(shí)現(xiàn)對(duì)高壓三相電流同時(shí)檢測(cè)的混合式光纖傳感系統(tǒng),給出了其在一相實(shí)驗(yàn)中的實(shí)驗(yàn)結(jié)果。由于光路系統(tǒng)采用了基于相位壓縮原理的微分干涉式結(jié)構(gòu),因此該系統(tǒng)不受外界緩變量(如溫度) 的影響;與一般干涉儀相比該系統(tǒng)也因相位壓縮而使工作的線性范圍擴(kuò)大了220 倍。
關(guān)鍵詞:三相電流; 相位壓縮; 干涉儀
Abstract :A hybrid optic fiber sensor is proposed with three sensor heads ,a optic fiber sensing arm ,a signal pro2 cess which can measure three2phase currents simultaneously ,and its experimental results in single phase is ab2 tained.Because optic circuit used differentiating interferometer based on phase compress theory ,the system can not be effected by outside slow variety such as temperature. Compared with common interferometers ,the linearity range of this system was enlarged by 220 times for phase compress.
Kay words :three2phase currents ; phase compress ; interferometer