A fiber optic temperature measuring device filled with glass tube
A fiber optic temperature and measuring device technology, which is applied to measuring devices, thermometers with physical/chemical changes, thermometers, etc., can solve the problems of inability to detect temperature changes, insufficient sensitivity of perception, and low sensitivity of temperature measurement
Active Publication Date: 2020-10-23
WUHAN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
The temperature measurement device made by using the intensity temperature sensor includes a hollow glass tube, a single-mode optical fiber, and a polarization controller. The hollow glass tube is not filled with liquid, so the intensity temperature sensor is not sensitive enough to the temperature of the external environment, that is, The sensitivity of temperature measurement is low, especially when the outside temperature changes in a small range, the intensity temperature sensor cannot detect temperature changes
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[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0025] Such as figure 1 As shown, the glass tube-filled optical fiber temperature measuring device of the embodiment of the present invention includes a supercontinuum light source 1, a hollow glass tube filling structure 2 and a spectrum analyzer connected in sequence through a single-mode optical fiber 7 along the signal input to signal output direction 4. The device also includes a temperature measurement module, and the temperature measurement module includes a column furnace and a temperature controller 3; wherein:
[0026] The supercontinuum light source 1 is used to generate broad-spectrum ...
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Abstract
The invention discloses a fiber optic temperature measuring device filled with a glass tube, which comprises a supercontinuum light source, a hollow glass tube filling structure and a spectrum analyzer sequentially connected through a single-mode optical fiber along the direction from signal input to signal output, and the device also includes The temperature measurement module includes a column furnace and a temperature controller; wherein: the supercontinuum light source is used to generate broad-spectrum light; the hollow glass tube filling structure is placed in the column furnace, and the air glass tube filling structure includes a filling part and a The unfilled part, the filled part is filled with alcohol solution inside; the temperature controller is used to control the ambient temperature in the column furnace. In the invention, the hollow glass tube is partially filled with alcohol solution to form an anti-resonant waveguide, and the linear change of the output power at the valley value of the resonance wavelength caused by the change of the external temperature is monitored by a spectrometer, thereby realizing effective measurement of the external temperature.
Description
technical field [0001] The invention relates to the technical field of optical fiber temperature measurement, in particular to a glass tube-filled optical fiber temperature measurement device. Background technique [0002] Accurate temperature measurement is very important in fiber optic communication and fiber optic sensing systems. At present, temperature sensing with small size and low cost is an important research direction in the field of optical fiber sensing, which is involved in many levels of modern industrial applications. Due to some excellent characteristics of optical fiber: small size, low cost, anti-electromagnetic interference, high temperature and high pressure resistance, etc., the temperature sensor based on optical fiber has become a mainstream hotspot in the field of temperature sensing; recently reported a hollow glass tube structure The fiber optic temperature sensor with anti-resonance effect has attracted attention, but its detection sensitivity is ...
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IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 王顺冯铭哲王帅
Owner WUHAN INSTITUTE OF TECHNOLOGY