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Fiber grating sensor insert for molded product detection and manufacturing method thereof

A technology of optical fiber grating and molded products, which is applied in the direction of using optical devices, instruments, and measuring heat. It can solve problems such as damage and fiber softness, and achieve the effects of reducing installation costs and improving survival rate and operability.

Active Publication Date: 2018-06-29
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Optical fiber can be used for on-line detection of temperature and strain after engraving grating. However, the optical fiber is soft and vulnerable to damage by high temperature and high pressure environment when the product is molded.
Therefore, implanting FBG sensors in molded articles is a technical challenge

Method used

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  • Fiber grating sensor insert for molded product detection and manufacturing method thereof
  • Fiber grating sensor insert for molded product detection and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] An on-line detection fiber grating sensor insert for a filter plate of a filter press formed by a molding process

[0059] Such as figure 1 As shown in , the insert consists of a fiber grating for temperature measurement and a fiber grating for strain measurement, and six grating units are engraved on each fiber (schematic figure 1 Only three are drawn in the figure), each grating unit is an independent sensor, and the central wavelengths of the grating units are 1512nm, 1516nm, 1520nm, 1524nm, 1528nm, 1532nm. The material of the optical fiber protective layer and the grating encapsulator is the same as that of the filter plate of the filter press, all of which are polypropylene. The thickness of the grating protective layer polypropylene is 1mm. The grating unit is protected by grating wrappers. Each optical fiber has six grating wrappers. A hard and temperature-resistant fiber optic connector embedded joint is installed at one end of each optical fiber.

[0060] The...

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Abstract

The invention discloses an optical fiber grating sensor insert for molded product detection and a manufacturing method thereof. The insert includes a temperature optical fiber grating, a strain optical fiber grating, a grating encapsulator, a protective layer and a connector, wherein: the temperature optical fiber grating, the strain optical fiber grating The optical fiber gratings are arranged side by side, and each includes several conductive optical fibers and grating unit areas arranged at intervals. The temperature optical fiber grating and the strain optical fiber grating are provided with a grating encapsulator to protect the grating unit area. The ends of the grating and the strain fiber grating are provided with connectors. The present invention can be implanted conveniently and reliably during the molding process of the product, so that the temperature sensor and the strain sensor can be embedded in the product, and the sensor can be positioned, which can ensure the survival of the sensor under the high temperature and high pressure conditions of molding, and the sensor has no Seams are embedded inside the product, which can significantly improve the measurement accuracy and service life of the sensor.

Description

technical field [0001] The invention relates to an optical fiber grating sensor insert used for detecting molded products and a manufacturing method thereof. Background technique [0002] The manufacturing industry is the main body of the national economy, the foundation of the country, the instrument of rejuvenating the country, and the foundation of a strong country. The realization of "Made in China 2025" puts forward higher requirements for the intelligence of the manufacturing industry. Therefore, the intelligent detection, intelligent control, and intelligent The demand for diagnosis, intelligent decision-making, and intelligent maintenance continues to increase. In modern industrial production, especially in the automated production process, it is necessary to use various sensors to monitor and control various parameters in the production process, to maintain the best condition of the equipment, and to strive for good product quality and low production costs. Industr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32G01B11/16G01K11/3206
CPCG01B11/165G01K11/32
Inventor 贾玉玺郭云力安立佳董琪高琳琳叶慧王庆林周勇
Owner SHANDONG UNIV
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