Distributed optical fiber sensing system with high space resolving power
A distributed optical fiber and high spatial resolution technology, applied in the direction of fiber mechanical structure, measuring device, instrument, etc., can solve the problems of high cost and development space limitation, and achieve the effect of low cost, improved spatial resolution and increased effective length
Active Publication Date: 2011-01-26
SUZHOU GUANGGE EQUIP
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Problems solved by technology
In this case, the further shortening of the sensing fiber length is limited by the further increase of the sampling rate and the further reduction of the laser pulse width. Therefore, the cost of this solution is relatively high, and the development space is also limited.
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Embodiment 1
[0020] Embodiment one: see figure 1 As shown, it is a schematic diagram of a high spatial resolution distributed optical fiber sensing system provided in this embodiment; the system includes a sensing host 4 and a sensing optical fiber 1, and the head and tail ends of the sensing optical fiber 1 are connected to the sensing system host 4, Constitutes a double-ended measurement method.
[0021] The sensing optical fiber 1 is composed of a section of ribbon optical cable 9 and four optical fiber disc sensing probes 5, 6, 7, 8 in series, wherein the ribbon optical cable 9, the winding of the optical fiber disc sensing probes 5, 6 The winding method is oval, please refer to the attached figure 2 , which is a schematic diagram of the structure of the sensing optical fiber arranged in a curved shape provided in this embodiment; the specific winding path is: the optical fiber starts from a, passes through b to c, then reaches d, then reaches e, then reaches b, and then Arrive at c...
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The invention discloses a distributed optical fiber sensing system with high space resolving power, comprising a sensing system host (4) and a sensing optical fiber (1). The sensing optical fiber (1) comprises at least one section of flat ribbon optical cable (9) or at least one sensing probe (5) of an optical fiber disc type, and the sensing optical fiber in the ribbon optical cable or the sensing probe of the optical fiber disc type is arranged in a bending and winding manner. The space resolution of the sensing system is improved by the bending manner, the bending size and the bending turnnumber of the optical fiber. Without changing the construction of a traditional distributed optical fiber sensing system host, the invention improves the space resolving power of the system by using a method of increasing the bending turn number of the optical fiber and has the advantages of low cost, simpleness, practicability and obvious effect.
Description
technical field [0001] The invention relates to a distributed optical fiber sensing system, in particular to a distributed optical fiber sensing system with high spatial resolution. Background technique [0002] In recent years, the distributed optical fiber sensing system composed of Raman scattering or Brillouin scattering light time-domain reflectometry has been developed rapidly, and its measurement accuracy and measurement distance can basically meet the needs of most engineering applications . However, the spatial resolution of the distributed optical fiber sensing system (the shortest sensing fiber length required to accurately measure the sensing quantity of the measured object) is generally about 1 meter, that is to say, the temperature measured by the distributed optical fiber sensing system (strain) is the average value within a range of 1 meter. If the measured temperature (strain) changes in a small local area (length and width are less than 1 meter), it will c...
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Login to View More IPC IPC(8): G01K11/32G02B6/44G01K11/322G01K11/324
Inventor 姜明武陈志标王兵辉
Owner SUZHOU GUANGGE EQUIP