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公开(公告)号：EP0131404A2
公开(公告)日：1985-01-16
申请号：EP84304267.2
申请日：1984-06-25
申请人： STC PLC
IPC分类号： G02B6/10 , G01D5/26 , G01R33/032
CPC分类号： G01D5/35303 , G01K5/50 , G01R33/0327
摘要： A fibre optic sensor in which the sensed parameter acts upon particles present in a plastics coating surrounding an optical fibre in such a way that the action modifies an optical propagation characteristic of the fibre. Thus the change in optical path length of the fibre included by the surrounding ferrite particle loaded plastics layer in the presence of a magnetic field provides the fibre with sensitivity to magnetic fields which can be detected by optical interferometry.
摘要翻译： 一种光纤传感器，其中感测的参数作用于存在于围绕光纤的塑料涂层中的颗粒，使得该动作改变光纤的光传播特性。 因此，在存在磁场的情况下，围绕铁氧体颗粒装载的塑料层所包含的纤维的光路长度的变化为纤维提供了对通过光学干涉测量可以检测的磁场的灵敏度。
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公开(公告)号：EP0320100A2
公开(公告)日：1989-06-14
申请号：EP88309780.0
申请日：1988-10-19
申请人： STC PLC
IPC分类号： H03M1/38
CPC分类号： H03M1/80 , H03M1/46 , Y10S505/827
摘要： A successive approximation analogue to digital converter including at least one superconducting loop (Fig. 3-30; Fig. 8-68). Superconducting loops (61-64) may be used to store flux quanta used as reference levels in a digital to analogue converter of the analogue to digital converter. Alternatively, non-superconducting reference inductors (Fig. 3-38) can provide flux quanta reference levels. Switchable screens (34;66) are interposed between the flux quanta stores and lobes (31;74) in an addition/subtraction superconducting loop (30;68). An analogue signal is sampled and the corresponding magnetic flux coupled to a sensing lobe (32;71) and concentrated at a flux concentrating lobe (33;72). The reference fluxes are selectively coupled into the addition/subtraction superconducting loop until a magnetometer (40;73) indicates zero net flux through the concentrating lobe, this corresponding to completion of the conversion.
摘要翻译： 包括至少一个超导环路的逐次逼近模数转换器（图3-30;图8-68）。 可以使用超导环（61-64）来存储用作模数转换器的数模转换器中的参考电平的通量量。 或者，非超导参考电感（图3-38）可以提供通量量子参考电平。 在加/减超导环（30; 68）中，可切换屏（34; 66）介于通量量子存储和波瓣（31; 74）之间。 模拟信号被采样，并且相应的磁通耦合到感测凸角（32; 71）并且集中在磁通集中凸角（33; 72）处。 参考通量选择性地耦合到加法/减法超导环路中，直到磁力计（40; 73）表示通过集中凸角的零净通量，这对应于转换完成。
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公开(公告)号：EP0160404B1
公开(公告)日：1988-07-27
申请号：EP85302240.8
申请日：1985-04-24
申请人： STC PLC
CPC分类号： G01R15/248 , G01D5/268 , G01L1/241 , G01R33/032 , G02F1/0131
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公开(公告)号：EP0131404A3
公开(公告)日：1987-07-01
申请号：EP84304267
申请日：1984-06-25
申请人： STC PLC
IPC分类号： G02B06/10 , G01D05/26 , G01R33/032
CPC分类号： G01D5/35303 , G01K5/50 , G01R33/0327
摘要： A fibre optic sensor in which the sensed parameter acts upon particles present in a plastics coating surrounding an optical fibre in such a way that the action modifies an optical propagation characteristic of the fibre. Thus the change in optical path length of the fibre included by the surrounding ferrite particle loaded plastics layer in the presence of a magnetic field provides the fibre with sensitivity to magnetic fields which can be detected by optical interferometry.
摘要翻译： 一种光纤传感器，其中感测的参数作用于存在于围绕光纤的塑料涂层中的颗粒，使得该动作改变光纤的光传播特性。 因此，在存在磁场的情况下，围绕铁氧体颗粒装载的塑料层所包含的纤维的光路长度的变化为纤维提供了对通过光学干涉测量可以检测的磁场的灵敏度。
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公开(公告)号：EP0253466A3
公开(公告)日：1989-10-11
申请号：EP87302609.0
申请日：1987-03-26
申请人： STC PLC
摘要： An optical sensor uses a torsion-mounted thin silicon paddle (1) with magnetically soft material (2) on its back. A light beam falls on the front face and part of the beam is reflected to a photo-diode (4) whose output drives a current in a magnetising coil (5). The magnetic field thus produced rotates the paddle out of the beam, which cuts off the light to the photo-diode. Thus the paddle oscillates with an amplitude which depends on the strain due to the torsion mounting. This modulates the light beam, and if they have different resonances several such sensors can share the same beam with common read-out means.
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公开(公告)号：EP0253466A2
公开(公告)日：1988-01-20
申请号：EP87302609.0
申请日：1987-03-26
申请人： STC PLC
摘要： An optical sensor uses a torsion-mounted thin silicon paddle (1) with magnetically soft material (2) on its back. A light beam falls on the front face and part of the beam is reflected to a photo-diode (4) whose output drives a current in a magnetising coil (5). The magnetic field thus produced rotates the paddle out of the beam, which cuts off the light to the photo-diode. Thus the paddle oscillates with an amplitude which depends on the strain due to the torsion mounting. This modulates the light beam, and if they have different resonances several such sensors can share the same beam with common read-out means.
摘要翻译： 光学传感器在其背面使用带有软磁材料（2）的扭转安装的薄硅浆（1）。 光束落在正面上，光束的一部分被反射到输出驱动磁化线圈（5）中的电流的光电二极管（4）。 这样产生的磁场将桨转动离开光束，将光切断到光电二极管。 因此，桨叶以由于扭转安装所引起的应变的幅度振荡。 这调制光束，并且如果它们具有不同的谐振，那么几个这样的传感器可以与普通读出装置共享相同的光束。
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公开(公告)号：EP0160404A1
公开(公告)日：1985-11-06
申请号：EP85302240.8
申请日：1985-04-24
申请人： STC PLC
CPC分类号： G01R15/248 , G01D5/268 , G01L1/241 , G01R33/032 , G02F1/0131
摘要： Certain materials (e.g. polymers, glasses) exhibit the photo-elastic effect, whereby when they are subject to stress become birefringent, which influences a light beam passing through the glass. This beam, e.g. from a laser (1) is collimated and circularly polarised as it approaches the glass (4) and is again polarised as it leaves the glass. This stress is applied, according to this invention, by magnetostrictive strips on the glass which are influenced, by the magnetic field to be measured or the AC bias field. A miniaturised arrangement using this principle is described.
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公开(公告)号：EP0163401A2
公开(公告)日：1985-12-04
申请号：EP85302700.1
申请日：1985-04-17
申请人： STC PLC
IPC分类号： G02B6/44
CPC分类号： G02B6/4427 , G02B6/4401 , G02B6/4403 , G02B6/4492
摘要： Amorphous metallic material in ribbon form is employed to provide hermeticity of cable elements, particularly optical fibres. The metallic glass CuZr has a low permeability for hydrogen, particularly when erbium is included. Thus sealing optical fibres (1) in amorphous metal tubes (3) will prevent increase in attenuation of such fibres when used in submarine cables by preventing contact with hydrogen generated in such cables during use thereof.
摘要翻译： 使用带形式的无定形金属材料来提供电缆元件，特别是光纤的气密性。 金属玻璃CuZr对氢气具有低磁导率，特别是当包含铒时。 因此，非晶金属管（3）中的密封光纤（1）将防止在使用时在这种电缆中防止与在这种电缆中产生的氢的接触而用于海底电缆中的这种纤维的衰减增加。
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公开(公告)号：EP0157470A2
公开(公告)日：1985-10-09
申请号：EP85300418.2
申请日：1985-01-23
申请人： STC PLC
IPC分类号： G01R33/06
摘要： An alternating magnetic excitation field is generated in the flux concentrators (11, 12) of a Hall effect device, including a Hall element (13), by passing an a.c. current through a coil (14). This alternating field serves to drive the flux concentrators into and out of saturation. In the presence of a d.c. magnetic field and when a Hall current is applied to the Hall element, a second harmonic component is generated in the output voltage of the Hall element (13); the amplitude of the second harmonic component providing a measure of the d.c. magnetic field. In an alternative arrangement (Fig. 4) the flux concentrator means is in loop form rather than in a flat configuration as in Fig. 3.
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