Fiber grating humidity sensor and manufacturing method thereof

Abstract

The invention discloses a fiber bragg grating humidity sensor. A manufacturing method of the sensor comprises the steps of detecting an existing optical fiber SPR probe and classifying according to a detection result; carrying out film removal treatment on a substandard optical fiber SPR probe to obtain a reusable optical fiber SPR probe; carrying out pretreatment on the obtained optical fiber SPR probe; and coating the treated optical fiber SPR probe with a coating film by adopting a pulling method, and repeating to obtain optical fiber SPR probes with different coating film thicknesses. According to the method, the optical fiber SPR probe with intact performance is obtained by carrying out reversible treatment on the optical fiber SPR probe with coating failure, the optical fiber SPR probe is coated again, effective optical fiber SPR probes with different coating thicknesses are obtained, and the method has the functions of waste utilization and resource saving.

Description

Technical field: [0001] The invention relates to a temperature sensor, in particular to a fiber grating humidity sensor. Background technique: [0002] Because the fiber grating sensor has the advantages of strong anti-electromagnetic interference, good flexibility, corrosion resistance, light weight, etc., it can overcome many shortcomings of the traditional humidity sensor, so it has been well developed. The existing fiber grating sensors are based on it The humidity-sensitive material is covered to monitor the relative humidity. However, after a long period of repeated use, the moisture-sensitive material layer will be deteriorated or worn due to factors such as environmental corrosion, and its humidity-sensitive characteristics will be affected. The existing practice is Directly replace the new sensor and throw away the old one. However, the replaced fiber optic SPR probe is good, only the deterioration or wear of the surface coating leads to a decline in performance, an...

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Problems solved by technology

[0002] Because the fiber grating sensor has the advantages of strong anti-electromagnetic interference, good flexibility, corrosion resistance, light weight, etc., it can overcome many shortcomings of the traditional humidity sensor, so it has been well developed. The existing fiber grating sensors are based on it The humidity-sensitive material is covered to monitor the relative humidity. However, after a long period of repeated use, the moisture-sensitive material layer will be deteriorated or worn due to factors such as environmental corrosion, and its humidity-sensitive characteristics will be affected. The existing practice is Directly replace the new sensor and throw away the old one. However, the replaced fiber optic SPR probe is good, only the deterioration or wear of the surface coating leads to a decline in performance, and direct throwing away causes a certain amount of waste.

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