发明名称 Device and method for determining the composition of a mixture of fluids
摘要 <p>A device for determining the composition of a mixture of fluids by spectral absorption, comprises: a radiation source; a detector for detecting radiation that has been attenuated by the mixture; and a device for separating the radiation into a wavelength band corresponding to an absorption band of one of the fluids, a wavelength band corresponding to an absorption band of another of the fluids, and at least one reference wavelength band substantially adjacent to each of the absorption bands, and especially adjacent to each side of the absorption band or group of absorption bands. The device may be used to determine the composition of mixtures of oil, water and gaseous hydrocarbons in oil wells where there is a very large degree of time varying scattering e.g. Rayleigh and Mie scattering due to turbulence. In addition, a device for outputting the ratio of values of a pair of signals, e.g the output from such a device, comprises a detector (72, 76) for sampling each signal; a variable-gain amplifier (82) for amplifying each of the detected signals with the same gain and outputting each of the amplified signals. The variable- gain amplifier includes a feedback loop (90, 94) for receiving one of the amplified signals output by the amplifier and adjusting the gain of the amplifier to be inversely proportional thereto, so that the other of the pair of signals is output by the amplifier with reference to the said one of the signals.</p>
申请公布号 AU2010255551(B2) 申请公布日期 2013.04.18
申请号 AU20100255551 申请日期 2010.06.04
申请人 PIETRO FIORENTINI SPA 发明人 JONES, ROBERT;HAYES, MATTHEW JAMES;RYDER, PAUL DAVID
分类号 G01N21/31;G01N21/35;G01N33/28 主分类号 G01N21/31
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