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An optical fiber quality detection sensor

A technology for detecting sensors and optical fibers, which is applied in the field of optical fiber quality detection sensors, can solve problems such as complex debugging, low sensitivity, and poor stability, and achieve accurate spectral measurement

Active Publication Date: 2022-06-17
SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Optical fiber measurement has the characteristics of high precision, low loss, and high sensitivity. Optical fiber quality detectors on the market are often expensive, complicated to debug, poor in stability, and low in sensitivity.

Method used

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  • An optical fiber quality detection sensor
  • An optical fiber quality detection sensor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] See figure 1 , figure 1 It is a schematic structural diagram of an optical fiber quality detection sensor provided by an embodiment of the present invention. It should be noted that, figure 1 It is a schematic diagram of the front view of the optical fiber quality detection sensor; each part is only for illustration, and the layout and shape thereof do not limit the structure of the optical fiber quality detection sensor of the embodiment of the present invention. like figure 1 As shown, the optical fiber quality detection sensor includes: a first optical fiber 101 , a second optical fiber 102 , an elastic part 20 , a movable part 30 , a stage 40 , and a substrate 50 . One end of the first optical fiber 101 is connected to the light source, and the other end is attached to the movable part 30; one end of the second optical fiber 102 is connected to the spectrometer and the photodetector, and the other end is also attached to the movable part 30; The optical fiber 101...

Embodiment 2

[0045] The technical feature that is different from the first embodiment is that in this embodiment, the movable portion 30 is a circular frustum-shaped material strip with a gradually increasing diameter. In this way, during the downward movement of the movable part 30, in addition to the change in the refractive index of the material, which affects the coupling effect between the first optical fiber 101 and the second optical fiber 102, the area of ​​the movable part 30, The change in the distance changes the coupling effect between the first optical fiber 101 and the second optical fiber 102 . As a result, multiple changes make the device more sensitive.

[0046]When measuring the mass of the object, when the optical path is turned on, the object on the stage 40 will squeeze the movable part 30 downward due to its gravity; the movable part 30 moves downward after being squeezed, changing the position of the first optical fiber 101 The refractive index of the material of th...

Embodiment 3

[0048] The technical feature that is different from the second embodiment is that in this embodiment, a connecting portion 60 is provided between the first optical fiber 101 and the second optical fiber 102 , the connecting portion 60 is attached to the movable portion 30 , and the material of the connecting portion 60 is transparent. Flexible material.

[0049] In this way, during the movement of the movable portion 30, the shape of the connecting portion 60 is changed to a concave shape due to the increase of its diameter, so that the propagation state of the light in the connecting portion 60 is changed, thereby changing the The coupling between the first optical fiber 101 and the second optical fiber 102 realizes quality detection by measuring the transmission spectrum.

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Abstract

The invention discloses an optical fiber quality detection sensor. The device comprises: a first optical fiber, a second optical fiber, an elastic part, a movable part, an object stage, and a substrate; Gravity will squeeze the active part downward; the active part will move downward after being squeezed, and the refractive index of the material of the active part in the part facing the fiber head will change, changing the coupling between the first optical fiber and the second optical fiber Characteristics, spectrometers and photodetectors are used to measure the mass of objects. The present invention changes the refractive index between the two optical fibers and the coupling characteristics between the two through the change of gravity, which is very accurate for the spectral measurement of the optical fiber, and the transmission characteristics of the optical fiber are greatly affected by the refractive index, so the present invention The device is very accurate and sensitive.

Description

technical field [0001] The invention belongs to the field of quality detection, in particular to an optical fiber quality detection sensor. Background technique [0002] Quality inspection can be seen everywhere in life. In different industries and fields, there are different requirements for quality inspection. Most of the quality inspection instruments on the market are made based on electrical signals. These quality inspection instruments have low accuracy, weak adaptability, and In addition to often matching complex circuits to remove noise, process data, and improve accuracy, these quality detectors have low sensitivity and are not suitable for demanding environments. [0003] Optical fiber, short for optical fiber, is a fiber made of glass or plastic that acts as a light-transmitting tool. The transmission principle is "total reflection of light". The tiny fiber is encased in a plastic jacket that allows it to bend without breaking. Typically, a transmitter at one e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01G9/00
CPCG01G9/00
Inventor 张素英
Owner SHANDONG FIRST MEDICAL UNIV & SHANDONG ACADEMY OF MEDICAL SCI