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公开(公告)号：US20210349068A1
公开(公告)日：2021-11-11
申请号：US17274270
申请日：2019-09-03
申请人： Cranfield University
摘要： An interferometric fluid sensing system is provided. The system comprises: a laser; a plurality of first fibre portions arranged to receive laser light from the laser, wherein each of the first fibre portions comprises a void and an opening to allow fluid from the environment around the corresponding first fibre portion to enter the void, wherein the first fibre portions are configured such that the laser light received by each first fibre portion passes through the corresponding void; a second fibre portion configured to provide a reference arm for the interferometric fluid sensing system; and a detector arranged to receive light from the first and second fibre portions, wherein the system is configured such that the laser light that passes through the void of each first fibre portion is caused to interfere with the light passing through the second fibre portion at or before reaching the detector, wherein each of the first fibre portions is arranged such that that light passing through the void of each first fibre portion travels from the laser to the detector over a different path length from the light passing through the voids of the other first fibre portions, wherein the system is configured such that the wavelength of light provided by the laser varies with time according to a modulated function, the modulated function comprising a first function, which varies through a range of wavelengths, modulated by a second, cyclical carrier function. An interferometric fluid detection method is also provided.
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公开(公告)号：US12013385B2
公开(公告)日：2024-06-18
申请号：US17274270
申请日：2019-09-03
申请人： Cranfield University
IPC分类号： G01N15/1434 , G01D5/353 , G01N21/39 , G01N21/45 , G01N33/00
CPC分类号： G01N33/0075 , G01D5/35316 , G01N15/1436 , G01N21/39 , G01N21/45 , G01N2021/391 , G01N2021/451
摘要： An interferometric fluid sensing system includes: a laser; a plurality of first fibre portions arranged to receive laser light from the laser; a second fibre portion configured to provide a reference arm for the interferometric fluid sensing system; and a detector arranged to receive light from the first and second fibre portions, wherein the laser light that passes through a void of each first fibre portion is caused to interfere with light passing through the second fibre portion at or before reaching the detector, wherein each of the first fibre portions is arranged such that that light passing through the void of each first fibre portion travels from the laser to the detector over a different path length from the light passing through the voids of the other first fibre portions.
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