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An all-fiber-optic sensor that simultaneously measures temperature and humidity

A technology for measuring temperature and all optical fibers, which is applied in the direction of using optical devices to transmit sensing components, etc., to achieve the effects of small size, easy installation, and good compatibility

Inactive Publication Date: 2017-05-10
ANHUI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far there is no published report on an all-fiber sensor that simultaneously measures temperature and humidity at the same point

Method used

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  • An all-fiber-optic sensor that simultaneously measures temperature and humidity
  • An all-fiber-optic sensor that simultaneously measures temperature and humidity
  • An all-fiber-optic sensor that simultaneously measures temperature and humidity

Examples

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Embodiment Construction

[0021] see figure 1 , the structure of the all-fiber sensor that can simultaneously measure temperature and humidity in this embodiment is: the input single-mode fiber 1 and one end of the photosensitive fiber 2 are connected by dislocation welding, and the other end surface of the photosensitive fiber 2 is set There is a reflective silver film 3, and a fiber Bragg grating is written in the core of the photosensitive optical fiber 2; the all-fiber Michelson intermode interference is formed by dislocation fusion splicing of the input single-mode optical fiber 1 and the photosensitive optical fiber 2 coated with a reflective silver film 3 on the end surface The instrument is used as the first sensing probe; the second sensing probe is formed by writing the fiber Bragg grating in the core of the photosensitive optical fiber 2; it constitutes an all-fiber Michelson intermode interferometer and a fiber Bragg grating integrated In the optical fiber sensor, the photosensitive optical...

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Abstract

The invention discloses a full-optical-fiber sensor capable of measuring temperature and humidity at the same time. The full-optical-fiber sensor is characterized in that an input single-mode optical fiber and one end of a photosensitive optical fiber are connected by means of disposition welding, a reflection silver film is arranged on the end face of the other end of the photosensitive optical fiber, and an optical fiber Bragg grating is written in a fiber core of the photosensitive optical fiber; a full-optical-fiber Michelson inter-mode interferometer is formed by disposition welding of the input single-mode optical fiber and the photosensitive optical fiber with the reflection silver film plated on the end face to serve as a first sensing probe; a second sensing probe is formed by writing the optical fiber Bragg grating in the fiber core of the photosensitive optical fiber; the full-optical-fiber sensor is formed by integrating the full-optical-fiber Michelson inter-mode interferometer with the optical fiber Bragg grating. The two sensing probes different in structure are integrated into a whole, so that simultaneous measuring of temperature and humidity of a same point is realized truly.

Description

technical field [0001] The invention relates to an optical fiber sensor, more specifically, an all optical fiber sensor for simultaneously measuring temperature and humidity. Background technique [0002] With the development of industry and agriculture and the continuous advancement of science and technology, in the fields of national defense technology, aerospace, food production, biopharmaceuticals, storage and agriculture, there are strict requirements for environmental temperature and humidity monitoring, and the environmental adaptability of sensors ,Measuring range. Response speed and measurement accuracy requirements are getting higher and higher. Due to its small size, high temperature resistance, corrosion resistance, and electromagnetic interference resistance, fiber optic sensors can overcome the shortcomings of traditional electrical sensors that cannot work in environments with high temperature, high humidity, severe pollution, and strong magnetic field interf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/28
Inventor 曹志刚俞本立程炜张欣宇张欢高大远殷晨晨王健
Owner ANHUI UNIVERSITY
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