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Reflection type optical fiber displacement sensing system and preparation method thereof

A displacement sensing system and reflective technology, which is applied in the direction of transmitting sensing components, converting sensor output, and optics with optical devices, can solve problems such as complex structures and large volumes, and achieve small volumes, high precision, and simple structures Effect

Pending Publication Date: 2021-05-04
GUANGZHOU NANYANG POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and problems of large volume and complex structure in the prior art, and provide a reflective optical fiber displacement sensing system with small volume and simple structure and its preparation method

Method used

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  • Reflection type optical fiber displacement sensing system and preparation method thereof
  • Reflection type optical fiber displacement sensing system and preparation method thereof
  • Reflection type optical fiber displacement sensing system and preparation method thereof

Examples

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Effect test

preparation example Construction

[0053] A kind of preparation method of above-mentioned reflective optical fiber displacement sensor system, comprises the following steps:

[0054] The first step: first put the bare optical fiber 41 before launching and the bare optical fiber 51 before receiving side by side and close together, then smear fluid state resin on the side walls of the bare optical fiber 41 before launching and the bare optical fiber 51 before receiving, and then put the The bare optical fiber 41 before launching and the bare optical fiber 51 before receiving resin are inserted into the long sleeve 1 until the head ends of the bare optical fiber 41 before launching and the bare optical fiber 51 before receiving pass through the first end surface X of the long sleeve 1, and the resin is cured After that, rough grinding, fine grinding, polishing, and alcohol cleaning are performed on the parts of the bare optical fiber 41 before launching and the bare optical fiber 51 before receiving that pass throu...

Embodiment 1

[0065] see figure 1 — Figure 6 , a reflective optical fiber displacement sensing system, comprising a transmitting optical fiber 4 and a receiving optical fiber 5, the input end of the emitting optical fiber 4 is connected to a light source 10, and the output end of the receiving optical fiber 5 is connected to a photodetector 11; The bare fiber 41 near its output end on the transmitting fiber 4 is the bare fiber 41 before receiving, and the bare fiber 51 near its input on the receiving fiber 5 is the bare fiber 51 before receiving. The bare fiber 41 before launching and the bare fiber 51 before receiving are arranged side by side. The bottom side circumference of 41 is in contact with the top side circumference of the bare optical fiber 51 before receiving; the outside of the side circumference of the bare optical fiber 41 before the emission and the bare optical fiber 51 before receiving are all wrapped with the same resin layer 6, and the outside of the resin layer 6 Wrap...

Embodiment 2

[0073] Basic content is the same as embodiment 1, the difference is:

[0074] Structurally, the outer sides of the bare optical fiber before transmitting 41 and the bare optical fiber before receiving 51 are wrapped with the same adhesive tape layer 7 , and the outer portion of the adhesive tape layer 7 is wrapped with a resin layer 6 .

[0075] In the preparation method: in the first step, the bare optical fiber 41 before emission and the bare optical fiber 51 before reception are arranged side by side and close together, and then the bare optical fiber 41 before emission and the bare optical fiber 51 before reception are wound at least Three layers of raw tape are used to obtain the tape layer 7, and then the fluid state resin is applied on the side circumference of the tape layer 7.

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Abstract

A reflection type optical fiber displacement sensing system comprises a transmitting optical fiber, a receiving optical fiber, a long sleeve and an outer sleeve, wherein a transmitting front bare optical fiber and a receiving front bare optical fiber which are correspondingly arranged on the transmitting optical fiber and the receiving optical fiber are close to each other, the side walls of the transmitting optical fiber and the receiving optical fiber are wrapped by the same resin layer, the resin layer is wrapped by the long sleeve, an outer sleeve is sleeved on the portion, close to the head end face of the long sleeve, of the long sleeve, the bottom of the outer sleeve is a reflecting face, the reflecting face is arranged right opposite to the head end faces of the bare optical fiber before emission and the bare optical fiber before receiving, a displacement cavity is formed between the reflecting face and the head end faces, the diameter of the outer sleeve is more than the diameter of the long sleeve, and a bobbin gap is formed between the inner sleeve wall of the outer sleeve and the outer tube wall of the long sleeve. According to the design, the size is small, the structure is simple, the manufacturing efficiency is high, and the stability is high.

Description

technical field [0001] The invention relates to an optical fiber sensing device, which belongs to the field of optical sensing devices, in particular to a reflective optical fiber displacement sensing system and a preparation method thereof. Background technique [0002] At present, according to the different roles played by optical fibers in sensors, optical fiber sensors are generally divided into two categories: functional type (or called sensing type) and non-functional type (light transmission type). Functional optical fiber sensors mostly use single-mode optical fiber, which not only plays the role of transmitting light in the sensor, but also is the sensitive element of the sensor. However, such sensors are technically difficult to manufacture, have complex structures, and are difficult to debug. Non-functional optical fiber sensor, the optical fiber itself only plays the role of light transmission, not the sensitive element of the sensor. The characteristics of this...

Claims

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Application Information

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IPC IPC(8): G01D5/353G02B6/26G02B6/42
CPCG01D5/35354G01D5/35374G02B6/262G02B6/424
Inventor 薛慧丽王容霞罗静其他发明人请求不公开姓名
Owner GUANGZHOU NANYANG POLYTECHNIC
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