公开(公告)号：US5274721A

公开(公告)日：1993-12-28

申请号：US846602

申请日：1992-03-05

申请人： William D. Dickinson ,  Richard Wissenbach ,  Donald Kaiser ,  Dean Agostini

发明人： William D. Dickinson ,  Richard Wissenbach ,  Donald Kaiser ,  Dean Agostini

IPC分类号： G01D5/26 ,  G01N1/10 ,  G02B6/36 ,  G02B6/42 ,  G02B6/00

CPC分类号： G02B6/4206 ,  G01D5/268 ,  G02B6/4203 ,  G02B6/4204 ,  G01N2001/1081

摘要： A fiber optic system and method in which the transmission of light through a fiber optic core of a fiber optic element is stabilized and optimized by eliminating the destabilizing effect of light independently propagated along the clad of the fiber optic element. The propagation of light along the clad may be essentially eliminated by a field stop member disposed between a light-receiving end of the fiber optic element and an LED light source, whereby light from the LED is entirely shielded from the clad. The field stop member is particularly effective when used in a fiber optic sensor, wherein the effect of clad light on transmission of light through the core is particularly destabilizing. Alternative structures for mitigating or eliminating the destabilizing effect of clad light are also provided in the form of alterations of the clad structure, or by providing a clad light stop diaphragm at the light-emitting end of the fiber optic element. Also provided is an aperture stop member, which may or may not be integrally formed with the field stop member, to optimize light propagation along the core by focusing light from an LED onto the light-receiving end of the core.

摘要翻译： 一种光纤系统和方法，其中通过光纤元件的光纤芯的光的透射通过消除沿着光纤元件的包层独立传播的光的不稳定效应来稳定和优化。 沿着包层的光的传播可以通过设置在光纤元件的光接收端和LED光源之间的场阻挡元件基本上消除，由此来自LED的光完全被覆盖。 当光纤传感器用于光纤传感器时，该场阻挡元件特别有效，其中包层光对透过芯的光的透过效果特别不稳定。 为了减轻或消除包覆光的不稳定效应的替代结构也以包层结构的改变的形式提供，或者通过在光纤元件的发光端提供包层光阻挡膜。 还提供了孔径光阑构件，其可以或可以不与场阻挡构件形成一体，以通过将来自LED的光聚焦到芯的光接收端来优化沿着芯的光传播。

公开(公告)号：US5633809A

公开(公告)日：1997-05-27

申请号：US635054

申请日：1996-04-19

申请人： Richard Wissenbach ,  Anthony Tavano

发明人： Richard Wissenbach ,  Anthony Tavano

IPC分类号： E03F7/00 ,  G01F1/00 ,  G01F23/16 ,  G01F23/18 ,  G01F23/24 ,  G01F23/26 ,  G01F23/296 ,  G01F23/44 ,  G01N1/10 ,  G01N1/14 ,  G01N1/18 ,  G01N1/20 ,  G01N33/18 ,  G06F17/00

CPC分类号： G01N1/14 ,  E03F7/00 ,  G01F1/002 ,  G01F1/005 ,  G01F23/168 ,  G01F23/18 ,  G01F23/24 ,  G01F23/245 ,  G01F23/263 ,  G01F23/296 ,  G01F23/44 ,  G01N1/2035 ,  G01N2001/1043 ,  G01N2001/1081 ,  G01N2001/1427 ,  G01N2001/185

摘要： A multi-function fluid flow monitoring apparatus capable of measuring fluid flow-related variables of fluid in a channel on the basis of signals from any one or more of a plurality of different types of flow sensors. Such different types of flow sensors may include, for example, a bubbler-type pressure sensor, a submerged pressure transducer, an ultrasonic transducer, and/or a velocity sensor forming part of an area-velocity sensor system, each of which sensors may be selectively connected to the apparatus as needed to accommodate various monitoring conditions. The apparatus is further capable of monitoring various conditions of fluid in the channel, such as pH level, ORP, temperature, solution conductivity, dissolved oxygen, and the like. In addition, the apparatus may be selectively linked with one of a variety of operational devices, such as an automatic sampling apparatus, a rain gauge, or a pump, so as to selectively initiate desired actions by such external device(s) or to otherwise operably cooperate with such external device(s). The integral operating unit includes a computer control system including a microprocessor, program memory, and data memory. External connectors are provided for selective connection to one or more different flow sensors, fluid condition sensors, and/or external devices. The apparatus further includes a display screen, controlled by the computer control system, which selectively displays data in either text or graphics formats. Data including flow-related data, fluid condition data, as well as data from external devices, may be transferred from the data memory of the apparatus to an external computer, printer, or the like by use of a hand-held data transfer unit or a modem integrally provided in the apparatus. The apparatus includes a liquid velocity measurement unit based upon Doppler technology, comprising a spectrum analyzer for calculating average fluid velocity, a mechanism for calculating maximum fluid velocity, and a means for verifying the calculated average fluid velocity based upon the calculated maximum fluid velocity value.