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Invention Publication
CN1742207A 具有多个传感器头的光纤电流传感器 失效 - 权利终止 转让

具有多个传感器头的光纤电流传感器
Abstract:
本发明涉及一种包括几个传感器头(H)的光纤电流和磁场传感器，以及对应的测量方法。所述传感器包括：光源(1)；N≥2个传感器头(H)；至少一个相位调制单元(PME)，至少包括相位调制器(PM)；检测器(2)；控制和评估单元(5)。所述相位调制单元(PME)在光学上连接到所述至少一个传感器头(H)并且使能对线性偏振的光波的差分和非互易相位调制。提供N个调制振幅φo，n和N个调制频率vn以用于差分和非互易相位调制。选择调制频率vn和能够预指定的两个正整数p、q，其中p≠q，使得对于所有整数n、m，其中n≠m且1≤n、m≤N：p·vn≠z·vm且q·vn≠z·vm。在调制相关的光路长度ln的基础上选择调制振幅φo，n和调制频率vn。本发明使能获得较好的信噪比。
Abstract(English):

The invention concerns an optic fiber current and magnetic field sensor, comprising several sensing heads (H), and a corresponding measurement method. Said sensor includes: a light source; N >/= 2 sensing heads (H); at least a phase modulation unit (PME) including at least a phase modulator (PM); a detector a control and evaluation unit. The phase modulation unit (PME) is optically connected to at least one of the sensing heads (H) and enables differential and non-reciprocal phase modulation of linearly polarized light waves. N modulation amplitudes phi 0,n and N modulation frequencies nu n are provided for the differential and non-reciprocal phase modulations. The modulation frequencies nu n and two positive integers p, q with p q, capable of being pre-allocated, are selected such that, for all the positive integers n, m with n m and 1

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