標題: Method of enhancing spatial resolution for distributed temperature measurement
作者: Chi
Sien
Lee
Chien-Chung
Chiang
Po-Wen
公開日期: 16-Nov-2004
摘要: A method that utilizes a short sampling interval and a long-pulsewidth laser source to obtain the long sensing range and employs a signal processing technique of decomposing Brillouin spectrum to achieve high spatial resolution, high temperature resolution of the distributed temperature measurement is disclosed. The present method includes the steps of measuring the Brillouin spectra of an optical pulse applying to a sensing fiber and a overlapped area thereof, determining the length that the pulse enters according to the measured Brillouin spectra and a weighting factor and then determining a real Brillouin spectrum profile and a temperature distribution according to Brillouin frequency shifts thereof. For a 9500-m sensing range of standard single-mode fiber and a 100-ns pulsewidth laser source, spatial and positon resolutions of 20 cm and a temperature resolution of 1.degree. C. are simultaneously achieved by using this signal processing method.
官方說明文件#: G01J005/00
G01K003/00
G01K011/00
URI: http://hdl.handle.net/11536/104839
專利國: USA
專利號碼: 06817759
Appears in Collections:Patents


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