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An optical fiber sensor probe

A technology of optical fiber sensing probe and optical fiber, which is applied in the direction of using optical devices to transmit sensing components, converting sensor output, and measuring the change force of optical properties of materials when they are stressed, which can solve the problem of small dynamic range and frequency range. Small, low signal-to-noise ratio, etc., to achieve the effect of large dynamic range

Inactive Publication Date: 2018-07-27
NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problems of small dynamic range, small frequency range and low signal-to-noise ratio of the measurable signal of the existing reflective intensity modulation optical fiber sensor, the present invention proposes an optical fiber sensing probe

Method used

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  • An optical fiber sensor probe
  • An optical fiber sensor probe
  • An optical fiber sensor probe

Examples

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Embodiment 1

[0045] Example 1: Combine below figure 1 with figure 2 This embodiment will be described in detail.

[0046] figure 1 It is a schematic diagram of the structure of the optical fiber sensing probe according to the first embodiment of the present invention. Such as figure 1 As shown, the optical fiber sensing probe described in this embodiment mainly includes: a housing 7, a sound pressure sensitive diaphragm 1, a transmitting optical fiber, a first receiving optical fiber, and a second receiving optical fiber. The sound pressure sensitive diaphragm 1 is arranged at the open end of the housing 7. One end of the transmitting fiber is connected to the light source, and the other end is the transmitting end 3. One end of the first receiving optical fiber and one end of the second receiving optical fiber are both connected to the photodetector, and the other end of the first receiving optical fiber and the other end of the second receiving optical fiber are the first receiving end 4 ...

Embodiment 2

[0060] Embodiment 2: the following combination image 3 This embodiment will be described in detail. This embodiment further limits the optical fiber sensing probe described in the first embodiment.

[0061] image 3 It is a schematic structural diagram of the optical fiber sensing probe according to the second embodiment of the present invention. Such as image 3 As shown, compared with Embodiment 1 of the present invention, the optical fiber sensing probe described in this embodiment further includes a single row of four-hole capillary quartz tubes 11 and redundant optical fibers 12. The transmitting end 3, the redundant optical fiber 12, the first receiving end 4 and the second receiving end 5 are sequentially fixedly arranged in a single row of four-hole capillary quartz tubes 11, and the single row of four-hole capillary quartz tubes 11 are fixedly arranged with the optical fiber fixing seat 6.

[0062] The optical fiber sensing probe described in this embodiment not only ...

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Abstract

The invention describes an optical fiber sensing probe and relates to the technical field of optical fiber sensing. The optical fiber sensing probe can help solve a problem that a conventional reflection type intensity modulation type optical fiber sensor is small in dynamic scope of measurable signals, small in frequency scope and low in signal to noise ratio. According to a technical solution of the optical fiber sensing probe, a sound pressure sensitive membrane is arranged on an open end of a shell body, one end of an emitting optical fiber is connected with a power source while the other end is an emitting end, one end of a first receiving optical fiber and one end of a second receiving optical fiber are connected with a photoelectric detector, and the other end of the first receiving optical fiber and the other end of the second receiving optical fiber are respectively a first receiving end and a second receiving end; the emitting end, the first receiving end and the second receiving end are positioned in the shell body. The sound pressure sensitive membrane is capable of reflecting optical signals emitted out via the emitting end to the first receiving end and the second receiving end. Optical signals entering the first receiving end and optical signals entering the second receiving end form differential signals. The optical fiber sensing probe is suitable for an optical fiber sensor.

Description

Technical field [0001] The present invention relates to the technical field of optical fiber sensing, in particular to a reflective intensity modulation type optical fiber sensing probe with a differential structure. Background technique [0002] Reflective intensity modulation optical fiber sensor not only has the advantages of corrosion resistance, anti-electromagnetic interference and high sensitivity, but also has the characteristics of passive front-end, simple principle, flexible design, reliable performance and low price. Reflective intensity modulation optical fiber sensors can detect various physical quantities such as strain, displacement, pressure, vibration, temperature and surface roughness, and occupy a very important position in the field of optical fiber sensing technology. [0003] However, the existing reflective intensity modulation optical fiber sensor has a small dynamic range, a small frequency range, and a low signal-to-noise ratio, resulting in unsatisfactor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/26G01L1/24
CPCG01D5/268G01L1/24
Inventor 桂永雷刘兴宇付士民孙权张鹏
Owner NO 49 INST CHINESE ELECTRONICS SCI & TECH GRP