Distributed optical fiber temperature strain sensing device
A distributed optical fiber, temperature strain technology, applied in the direction of using optical devices, thermometers, measuring devices, etc., can solve problems such as inability to accurately analyze abnormalities and limit the practical application of BOTDR
Pending Publication Date: 2022-06-10
一石数字技术成都有限公司
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Problems solved by technology
Due to the temperature and strain cross-sensitivity effect of BOTDR, it is impossible to accurately analyze whether the abnormality is caused by temperature or strain, which limits the practical application of BOTDR
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[0021] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.
[0022] It should be noted that, in order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodime...
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The invention discloses a distributed optical fiber temperature strain sensing device. The distributed optical fiber temperature strain sensing device comprises a first laser, a second laser, a first optical fiber coupler, a second optical fiber coupler, a third optical fiber coupler, an electro-optical modulator, a pulse driver, a scrambler, an optical fiber circulator, a Raman wavelength division multiplexer, a sensing optical fiber and a first avalanche photodiode detection module. The system comprises a first avalanche photodiode detection module, a second avalanche photodiode detection module, a microwave frequency meter, an electric control attenuator, a 2 * 2 optical fiber coupler, a balance detection module and a multi-channel data acquisition system. Through combination of the BOTDR and the DTS, the temperature and strain cross sensitive effect of the BOTDR is solved, and online monitoring of temperature and strain parameters of the sensing optical fiber is realized.
Description
technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a distributed optical fiber temperature strain sensing device. Background technique [0002] Distributed optical fiber sensing technology is a new type of online monitoring technology. It directly uses single-mode optical fiber as a sensor, which integrates transmission and sensing. It has the technical advantages of long measurement distance, no measurement blind area, and high measurement accuracy. [0003] The distributed optical fiber sensing device DTS based on the Raman scattering effect can realize temperature measurement along the optical fiber, and the distributed optical fiber sensing device BOTDR based on the Brillouin scattering effect can realize the temperature and strain measurement along the optical fiber. Due to the cross-sensitivity effect of temperature and strain of BOTDR, it is impossible to accurately analyze whether the abnormality...
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IPC IPC(8): G01K11/322G01K11/324G01B11/16
CPCG01K11/322G01K11/324G01B11/18
Inventor 涂勤昌施国鹏肖强王泽民
Owner 一石数字技术成都有限公司