公开(公告)号：WO2006101923A2

公开(公告)日：2006-09-28

申请号：PCT/US2006009400

申请日：2006-03-16

Applicant: DAVIDSON INSTR INC

Inventor： GILBER WILLIAM N ,  JEFFERS LARRY A ,  LOPUSHANSKY RICHARD L ,  GILLHAM FREDERICK J

IPC: H01S3/13

CPC classification number: G02B6/322 ,  G01B9/02068 ,  G01B2290/25 ,  G01D5/268 ,  G02B6/32 ,  G02B6/34

Abstract: In a Fabry-Perot interferometer based sensor if insufficient light reflected from the sensor re-enters the fiber, the results from the Fabry-Perot interferometer-based sensor are compromised. Accordingly, a sensor assembly is provided that comprises an optical fiber having an optical axis, a lens in optical communication with the optical fiber, the lens having an optical axis and the lens capable of transmitting a beam of light, a reflective surface, the reflective surface spaced from the lens such that the beam of light transmitted from the lens is capable of reflecting from the reflective surface back to the lens, and an alignment device capable of aligning the beam of light transmitted from the lens substantially perpendicular with the reflective surface.

Abstract translation: 在基于法布里 - 珀罗干涉仪的传感器中，如果从传感器反射的光线不足重新进入光纤，则来自法布里 - 珀罗干涉仪的传感器的结果受到损害。 因此，提供了一种传感器组件，其包括具有光轴的光纤，与光纤光学通信的透镜，透镜具有光轴，并且透镜能够透射光束，反射表面，反射面 表面与透镜间隔开，使得从透镜透射的光束能够从反射表面反射回透镜;以及对准装置，其能够将从透镜透射的光束与反射表面基本垂直地对准。

公开(公告)号：WO2007126491A3

公开(公告)日：2008-04-10

申请号：PCT/US2007004481

申请日：2007-02-22

Applicant: DAVIDSON INSTR INC

Inventor： LEITKO TRAVIS ,  LOPUSHANSKY RICHARD L ,  JEFFERS LARRY A ,  BERTHOLD JOHN W

IPC: G01L7/00

CPC classification number: G01L9/0079 ,  G01L13/025

Abstract: The present invention pertains to differential pressure transducers. In an embodiment of the invention, a differential pressure transducer includes a transducer housing, a diaphragm, a bellows, and a sensing assembly. The transducer housing, diaphragm, and bellows are coupled to form a pressure chamber. The pressure chamber is separated into two portions by the diaphragm, with each portion arranged to be filled with a process fluid. A pressure differential across the diaphragm causes displacement of the diaphragm. Such displacement is measured by, the sensing assembly and used to calculate the pressure differential between the two process fluids.

Abstract translation: 本发明涉及差压传感器。 在本发明的一个实施例中，差压换能器包括换能器壳体，隔膜，波纹管和感测组件。 传感器外壳，隔膜和波纹管联接以形成压力室。 压力室通过隔膜分成两部分，每个部分布置成填充有工艺流体。 隔膜上的压差导致隔膜的位移。 这种位移由传感组件测量，用于计算两种工艺流体之间的压力差。

公开(公告)号：WO2007109336A2

公开(公告)日：2007-09-27

申请号：PCT/US2007007050

申请日：2007-03-21

Applicant: DAVIDSON INSTR INC

Inventor： BERTHOLD JOHN W ,  COCKING SETH A ,  KAMINSKI WINCENTY A ,  JEFFERS LARRY A ,  LOPUSHANSKY RICHARD L

IPC: G01B9/02

CPC classification number: G01B9/02014 ,  G01B9/02004 ,  G01B9/02023 ,  G01B9/02028 ,  G01B2290/25 ,  G01D5/268 ,  G01D5/35383 ,  G01J3/26 ,  G01K11/3206 ,  G01L9/0079 ,  G01L11/025

Abstract: An apparatus to interrogate one or more fiber optic sensors to make high-resolution measurements at long distances between the sensor and the interrogator apparatus. The apparatus comprises a tunable light source, an optical switch for pulsing the light source, at least one sensor (e.g., a Fabry-Perot sensor) for reflecting the laser light, a fiber optic cable interconnecting the sensor with the light source, a coupler for directing the reflected light from the sensor to a detector in order to generate a digital output, and a control logic for tuning the laser light source based on the digital output from the detector. Use of a fiber Bragg grating temperature sensor is also contemplated.

Abstract translation: 一种用于询问一个或多个光纤传感器以在传感器和询问器装置之间的长距离进行高分辨率测量的装置。 该装置包括可调谐光源，用于脉冲光源的光学开关，用于反射激光的至少一个传感器（例如，法布里 - 珀罗传感器），将传感器与光源互连的光纤电缆，耦合器 用于将来自传感器的反射光引导到检测器以产生数字输出，以及用于基于来自检测器的数字输出调谐激光光源的控制逻辑。 也考虑使用光纤布拉格光栅温度传感器。

公开(公告)号：WO2005106416A2

公开(公告)日：2005-11-10

申请号：PCT/US2005012667

申请日：2005-04-15

Applicant: DAVIDSON INSTR INC

Inventor： LOPUSHANSKY RICHARD L ,  BERTHOLD JOHN W

IPC: G01L7/00 ,  G01L9/00 ,  G01L13/02

CPC classification number: G01L9/0079 ,  G01L13/025

Abstract: A differential pressure transducer which incorporates a Fabry-Perot sensor for direct quantitative measurements of the distance displaced by a piston abutting two pressure boundaries is described. The apparatus includes a piston with an annular protrusion which is fitted into a transducer housing having a peripheral groove that serves as a stop to prevent damage to the sensor in overpressure situations. A method of measuring differential pressure using a Fabry-Perot sensor is also contemplated.

Abstract translation: 描述了一种差压传感器，其包括法布里 - 珀罗传感器，用于直接定量测量靠着两个压力边界的活塞移动的距离。 该装置包括具有环形突起的活塞，该活塞安装在具有周边槽的换能器壳体中，该外围凹槽用作停止以防止在超压情况下损坏传感器。 也可以使用法布里 - 珀罗传感器测量差压的方法。