Unlock instant, AI-driven research and patent intelligence for your innovation.

Fiber optical sensor wavelength demodulation equipment

A wavelength demodulation and optical fiber sensing technology, which is used in the demodulation of light, the use of optical devices to transmit sensing components, light guides, etc. Application, optical fiber sensing wavelength demodulation equipment can not work properly, etc.

Active Publication Date: 2014-11-05
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the on-site environment of aerospace and some industrial applications is very complex, and the requirements for the equipment application environment are also very strict. In order to ensure the use of optical fiber sensing wavelength demodulation equipment in harsh, especially low temperature environments, optical fiber sensing Wavelength demodulation equipment must have a wide operating temperature range
At present, the working temperature of most optical fiber sensing wavelength demodulation equipment in the domestic and foreign markets is between 0 and 50°C, and very few can reach -15 to 55°C. When the ambient temperature is lower than -15°C, the optical fiber sensing wavelength demodulation The demodulation equipment cannot work normally, and the working environment of the demodulation equipment has greatly restricted the large-scale application of fiber optic sensors in industrial sites.
[0004] In order to use the optical fiber sensing measurement system in harsh environments, the traditional method is to place the optical fiber sensing wavelength demodulation equipment in a temperature-controlled box, but this method greatly increases the volume, weight and power consumption of the equipment, making it difficult to Applications in aerospace

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fiber optical sensor wavelength demodulation equipment
  • Fiber optical sensor wavelength demodulation equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The wavelength demodulation optical path 5 adopts a demodulation optical path based on the FP filtering method. At this time, the wavelength demodulation optical path 5 includes an FP filter demodulation optical component 501 and a photodiode detection component 502. FP filter 503 in component 501 provides the drive signal.

[0022] The FP filter 503 in the FP filter demodulation optical assembly 501 is placed in the micro heating and heat preservation element 11, the heating layer of the micro heating and heat preservation element 11 is in close contact with the surface of the FP filter 503, and the temperature sensor 9 is pasted on the FP filter 503. The position of the heating layer is used to collect the shell temperature of the FP filter 503, and the temperature sensor 9 sends the collected temperature information to the temperature collection control module 10, and the temperature collection control module 10 controls the working state of the miniature heating and ...

Embodiment 2

[0040] Such as figure 1 As shown, the wavelength demodulation optical path 5 adopts a demodulation optical path based on the diffraction spectroscopic method. At this time, the wavelength demodulation optical path 5 includes a diffraction spectroscopic optical path 501 and a linear array detector 502, and the optical path drive circuit 8 provides for the linear array detector 502. driving signal;

[0041] In order to ensure the correctness of spectrum splitting and detection, the diffraction splitting optical path 501 and the linear array detector 502 are packaged into a demodulating optical path device, and the demodulating optical path device is put into the micro heating and heat preservation element 11, and the micro heating and heat preservation element 11 The heating layer is in close contact with the surface of the demodulation optical path device, and the temperature sensor 9 is pasted on the side of the demodulation optical path device where the incident optical fiber...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to fiber optical sensor wavelength demodulation equipment, in particular to the fiber optical sensor wavelength demodulation equipment with wide temperature working range, belonging to the technical field of fiber optical sensors. The demodulation equipment consists of a broadband light source 1, a light source radiator 2, a fiber optical circulator 3, a wavelength demodulation light path 5, a wavelength resolving circuit 6, a light path driving circuit 8, a driving light source driving circuit 7, a temperature sensor 9, a temperature collecting control module 10 and a minitype heating heat-preservation element 11; wherein an optical signal returned by a measuring fiber optical sensor 4 is sent to the resolving circuit 6 by the wavelength demodulation light path 5 to demodulate the wavelength variation of the fiber optical sensor, an optical device of the light path 5 is put into the minitype heating heat-preservation element 11, and under the actions of the temperature sensor 9 and the temperature collecting control module 10, the light device works in a bearable working temperature scope. According to the fiber optical sensor wavelength demodulation equipment, a local temperature control manner is adopted so as to adapt to wide temperature work, and the fiber optical sensor wavelength demodulation equipment has the characteristics of being miniaturized, low in power consumption, high in reliability and the like.

Description

technical field [0001] The invention relates to an optical fiber sensing wavelength demodulation device, in particular to an optical fiber sensing wavelength demodulation device with a wide temperature working range, which belongs to the technical field of optical fiber sensing. Background technique [0002] Optical fiber sensors have the advantages of small sensing probes, strong anti-electromagnetic interference, can be implanted or attached to the surface of structures, and are easy to form a network for distributed measurement. They have been widely used in the safety monitoring of bridges, tunnels and other building structures. Applications in offshore oil, aerospace and other fields have also received more and more attention. [0003] However, the on-site environment of aerospace and some industrial applications is very complex, and the requirements for the equipment application environment are also very strict. In order to ensure the use of optical fiber sensing wavel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/26G02F2/00G02B6/293
Inventor 胡春艳隋广慧张磊申雅峰
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA