A temperature sensing system with fiber Bragg grating

A technology of optical fiber Bragg and sensing system, which is applied in the direction of physical/chemical change thermometers, thermometers, measuring devices, etc., which can solve problems such as difficult to ensure high-precision parallelism, low resolution, and limited service life, and achieve responsiveness Rapid, high-resolution, high-voltage-resistant and long-life effects

Inactive Publication Date: 2017-01-18
TAIYUAN UNIV OF TECH
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Problems solved by technology

When fiber grating sensors are used, wavelength demodulation is generally achieved by using tunable wavelength F-P filter demodulation technology in the prior art, but the FP components need to move at high speed, it is difficult to ensure high-precision parallelism, and the service life is therefore limited, and the resolution Generally not high

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  • A temperature sensing system with fiber Bragg grating
  • A temperature sensing system with fiber Bragg grating

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Embodiment Construction

[0029] Such as figure 1 As shown, the temperature sensing system with fiber Bragg gratings in this embodiment includes: light source 1, fiber optic circulator 2, one or more fiber optic FBG sensors 5, coupler 6, optical fiber 7, collimating lens 8, light Refractive holographic grating 9, focusing lens 10, imaging device 11, processor 15.

[0030] The light source 1 is used to emit light beams within a predetermined spectral band range.

[0031] The light outlet of the light source 1 is connected to the A port of the fiber optic circulator 2, and the light emitted from the light source 1 enters the fiber optic circulator 2 through the A port of the fiber optic circulator 2, and then outputs through the B port of the fiber optic circulator 2. The B port of the fiber optic circulator 2 is connected with a fiber optic FBG sensor. The optical fiber circulator 2 used in the present invention can guide the incident light from the A port to the B port, and output from the B port; a...

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Abstract

The invention provides a temperature sensing system with a fiber Bragg grating, which includes: a light source (1), a fiber optic circulator (2), one or more fiber optic FBG sensors (5), a coupler (6), an optical fiber (7), collimator lens (8), photorefractive holographic grating (9), focusing imaging lens (10), imaging device (11), processor (15). The present invention introduces the Fiber Bragg Grating (FBG grating for short) sensor into the field of temperature measurement, transmits information based on optical signals, has the advantages of anti-electromagnetic interference, anti-corrosion, high temperature resistance, high pressure resistance and long service life, and is stable Good, high sensitivity, high resolution, and simultaneous acquisition of all spectra from the same channel.

Description

technical field [0001] The invention relates to the field of temperature measurement, in particular to a temperature sensing system for temperature measurement of high-voltage electrified equipment. Background technique [0002] With the continuous acceleration of the development of modern power systems, China's power grid has also developed rapidly. At present, power grid construction has become the main direction of my country's power construction. Some high-voltage live equipment, such as high-voltage power cables, high-voltage transmission transformer coil windings, high-voltage switchgear, etc., play a decisive role in the safe and reliable operation of the power grid. If the temperature is too high, it will cause accidents. Therefore, it is very important to monitor the temperature of high-voltage live equipment online to prevent accidents. [0003] At present, the commonly used temperature measurement methods for high-voltage live equipment in China mainly include co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 王崇恩康颖卿张海涛郭倩吕雨虹
Owner TAIYUAN UNIV OF TECH
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