公开(公告)号：US20040239307A1

公开(公告)日：2004-12-02

申请号：US10804160

申请日：2004-03-19

Applicant: ABB Research Ltd

Inventor： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC: G01R019/00

CPC classification number: G01R15/242

Abstract: The electro-optical voltage sensor has an electro-optically active medium and a distance medium between two electrodes, between which the voltage V to be measured is present. The media and the thicknesses d1, d2 of the media are chosen in such a way that the measured voltage signal has no temperature dependence. By way of example, the thicknesses d1, d2 are chosen in such a way that the influence of the temperature dependences of critical electro-optical coefficients and dielectric constants of the media on the voltage signal cancel one another out. The two media are advantageously arranged in the form of a rod, comprising an alternating arrangement of cylindrical elements of the two media, between the electrodes. BGO and fused silica may advantageously be used as media. The sensor is preferably cast in silicone. It is possible to realize a mechanically stable, temperature-stabilized voltage sensor with low reflection losses, a large half wave voltage and a small sensitivity toward disturbances of the electric field.

Abstract translation: 电光电压传感器具有电光活性介质和两个电极之间的距离介质，在两个电极之间存在要测量的电压V. 介质和介质的厚度d1，d2以这样的方式选择，使得测量的电压信号没有温度依赖性。 作为示例，厚度d1，d2选择为使得介质的关键电光系数和介电常数的温度依赖性对电压信号的影响彼此抵消。 两个介质有利地以杆的形式布置，包括两个介质的圆柱形元件在电极之间的交替布置。 BGO和熔融石英可有利地用作介质。 该传感器优选用硅树脂铸造。 可以实现具有低反射损耗，大的半波电压和对电场干扰的小灵敏度的机械稳定的温度稳定的电压传感器。

公开(公告)号：US20040189278A1

公开(公告)日：2004-09-30

申请号：US10805517

申请日：2004-03-22

Applicant: ABB Research Ltd

Inventor： Klaus Bohnert ,  Andreas Frank ,  Hubert Brandle

IPC: G01R031/00

CPC classification number: G01R15/242 ,  G01R15/247 ,  G01R19/0084

Abstract: The voltage sensor for measurement of a voltage V, which is present between two electrodes (3, 4) and generates an electric field E, comprises at least two layers (1a, 2a) made of electro-optically active material and being arranged along a light path (5). Through the layers there passes a light beam, the phase and/or state of polarization of which is influenced on account of the electro-optical effect. The orientation of the electro-optically active layers (1a, 2a) relative to the light path and the electric field E is chosen in such a way, that the influencing of the light (5) in the second layer (2a) counteracts the influencing of the light (5) in the first layer (1a). In this way, it is possible to realize a sensor with a high half wave voltage, so that high voltages V can be measured unambiguously. A plurality of first and second electro-optically active layers are advantageously arranged between the electrodes (3, 4).

Abstract translation: 用于测量存在于两个电极（3,4）之间并产生电场E的电压V的电压传感器包括至少两层由电光活性材料制成的层（1a，2a），沿着 光路（5）。 通过这些层，通过光束，由于电光效应影响其相位和/或其极化状态。 以这样的方式选择电光活性层（1a，2a）相对于光路和电场E的取向，使得第二层（2a）中的光（5）的影响抵消影响 的第一层（1a）中的光（5）。 以这种方式，可以实现具有高半波电压的传感器，从而可以明确地测量高电压V. 多个第一和第二电光活性层有利地布置在电极（3,4）之间。

公开(公告)号：US20040160608A1

公开(公告)日：2004-08-19

申请号：US10777403

申请日：2004-02-13

Applicant: ABB Research Ltd.

Inventor： Klaus Bohnert ,  Philippe Gabus ,  Hubert Brandle

IPC: G01B009/02

CPC classification number: G01R15/247

Abstract: The invention relates to a fiberoptic current or magnetic field sensor having a plurality of sensor heads (H), and to a corresponding measurement method. The sensor has: a light source (1); Nnull2 sensor heads (H); at least one phase modulation unit (PME) having at least one phase modulator (PM); a detector (2); a control and evaluation unit (5). The at least one phase modulation unit (PME) is optically connected to at least one of the sensor heads (H). Linearly polarized lightwaves can be differentially phase-modulated in a non-reciprocal fashion by means of the at least one phase modulation unit (PME). N modulation amplitudes null0,n and N modulation frequencies nulln are provided for the non-reciprocal differential phase modulations, the modulation frequencies nulln and two prescribable positive whole numbers p, q with pnullq being selected in such a way that it holds for all positive whole numbers z and for all whole numbers n, m with nnullm and 1nulln,mnullN that:pnullnullnnullznullnullm andqnullnullnnullznullnullm.The modulation amplitudes null0,n and the modulation frequencies nulln are selected as a function of modulation-relevant optical path lengths ln. An improved signal-to-noise ratio can be achieved.

Abstract translation: 本发明涉及具有多个传感器头（H）的光纤电流或磁场传感器以及相应的测量方法。 传感器具有：光源（1）; N> = 2个传感头（H）; 至少一个具有至少一个相位调制器（PM）的相位调制单元（PME）; 检测器（2）; 控制和评估单元（5）。 所述至少一个相位调制单元（PME）被光学连接到所述传感器头（H）中的至少一个。 线偏振光波可以通过至少一个相位调制单元（PME）以不可逆的方式进行差分相位调制。 为非互易差分相位调制提供N个调制幅度phi0，n和N调制频率尼姑，调制频率尼姑和两个可处理的正整数p，q，其中p z.num和q.nun <> z.num。 作为调制相关光程长度ln的函数选择调制幅度phi0，n和调制频率尼姑。 可以实现改善的信噪比。