High-sensitivity optical fiber temperature sensing probe and manufacturing method thereof

An optical fiber temperature, sensing probe technology, applied in thermometers, thermometers with physical/chemical changes, measurement devices, etc., can solve the problem of reducing the cost and difficulty of demodulation, the small detection range of fiber optic temperature probes, and increasing the cost and difficulty of demodulation and other problems, to achieve the effect of ensuring the detection sensitivity and reducing the production cost

Inactive Publication Date: 2019-06-25
HARBIN INST OF TECH AT WEIHAI
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Problems solved by technology

However, the use of wide-spectrum light sources and spectrometers increases the cost and difficulty of demodulation, and increases the size and power consumption of the fiber-optic temperature sensor demodulation system
The intensity-modulated optical fiber temperature sensing probe directly uses the power meter to monitor the optical power signal, which greatly reduces the cost and difficulty of demodulation. It will be limited by the melting point and boiling point temperature, so the detection range of fiber optic temperature probes based on polymer or liquid sensitization is often too small, generally less than 100°C

Method used

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  • High-sensitivity optical fiber temperature sensing probe and manufacturing method thereof

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Embodiment Construction

[0022] Such as figure 1 as shown, figure 1 It is a structural schematic diagram of a high-sensitivity optical fiber temperature sensing probe proposed by the present invention.

[0023] refer to figure 1 , a high-sensitivity optical fiber temperature sensing probe proposed by the present invention, comprising: a probe body;

[0024] A sealed space is provided in the probe body, and the side wall of the sealed space is provided with an entrance and exit window, and the sealed space includes a first lumen and a second lumen that are sequentially connected in a direction away from the entrance and exit window. The lumen is filled with volatile liquid 5 .

[0025] In the specific working process of the high-sensitivity optical fiber temperature sensing probe of this embodiment, a laser and an optical power meter are connected to the incident window of the probe body, and the probe body is placed vertically so that the incident window is located at the bottom of the sealed space...

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Abstract

The present invention discloses a high-sensitivity optical fiber temperature sensing probe and a manufacturing method thereof. A probe body is internally provided with a confined space, the side wallof the confined space is provided with incident and emergent window, the confined space comprises a first tube cavity and a second tube cavity which communicate in a direction far away from the incident and emergent window in order, and the first tube cavity is filled with a volatile liquid. Through adoption of the high-sensitivity optical fiber temperature sensing probe with optimal design, the confined space is filled with the volatile liquid, the temperature sensing expanding features of the volatile liquid are employed, the refractive index of the volatile liquid is changed with the changeof the environment temperature to achieve flexible modulation of the refractive index and temperature sensing of the incident liquid surface so as to achieve low-cost temperature sensitive detection.The present invention further discloses a manufacturing method of a high-sensitivity optical fiber temperature sensing probe.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a high-sensitivity optical fiber temperature sensing probe and a manufacturing method thereof. Background technique [0002] With the rapid development of the Internet of Things in the "informatization" era, the demand for temperature sensors in daily life and production is increasing rapidly. As a new type of sensor, fiber optic temperature sensors have strong anti-electromagnetic interference capabilities, small size, light weight, and low power consumption. , Easy to reuse and other unique advantages, it has broad application prospects in power grids, oil wells, coal mine temperature monitoring, marine environment monitoring and other fields. According to different modulation methods, fiber optic temperature sensing probes can be divided into intensity modulation type, wavelength modulation type, phase modulation type, etc. However, since the ordinary silica fib...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
Inventor 刘一李岩曹坤健廖颖莹
Owner HARBIN INST OF TECH AT WEIHAI
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