公开(公告)号：US20020113961A1

公开(公告)日：2002-08-22

申请号：US10051305

申请日：2002-01-22

Applicant: Unisearch Associates Inc.

Inventor： Heather A. Gamble ,  John C. Robbins ,  Gervase I. MacKay ,  Harold I. Schiff

IPC: G01J003/44

CPC classification number: G01J3/44 ,  G01N21/05 ,  G01N21/65 ,  G01N21/85

Abstract: The present invention relates to a method and apparatus for detecting transitions between different gas or liquid products in a flow path and, more particularly, it relates to an apparatus and method utilizing Raman spectroscopy for detecting transitions between petroleum products. A Raman spectrometer is preferably to produce a monochromatic excitation beam at a wavelength of approximately 670 nm. The spectrometer consists of an entrance slit, a combined diffraction grating/focussing element, and an exit slit. The Raman signal, which exits the spectrometer exit slit is detected by a highly sensitive photomultiplier tube, and sent to a computer device for data acquisition and analysis. The proposed invention detects liquid or gas products in a flow path by detecting the changes in the composition of various petroleum products flowing through a gasoline pipeline, by means of exposing samples of various petroleum products to the Raman spectrometer system.

Abstract translation: 本发明涉及一种用于检测流路中不同气体或液体产物之间的转变的方法和装置，更具体地说，涉及利用拉曼光谱法检测石油产品之间的转变的装置和方法。 拉曼光谱仪优选地产生波长约670nm的单色激发光束。 光谱仪由入射狭缝，组合衍射光栅/聚焦元件和出口狭缝组成。 通过高灵敏度的光电倍增管检测离开光谱仪出口狭缝的拉曼信号，并发送到计算机设备进行数据采集和分析。 本发明通过将各种石油产品的样品暴露于拉曼光谱仪系统，通过检测流经汽油管道的各种石油产品的组成变化来检测流路中的液体或气体产物。