Optical fiber temperature sensor based on porous film and manufacturing and measuring method of optical fiber temperature sensor

Abstract

The invention provides an optical fiber temperature sensor based on a porous film. The optical fiber temperature sensor comprises a bare fiber formed by a fiber core and an optical fiber cladding. The end face of one end of the bare fiber is coated with a humidity sensitive film, and the other end of the bare fiber is used for outputting signals. The bare fiber is sleeved with a capillary glass tube, the two ends of the capillary glass tube are fixed and sealed through ultraviolet curing glue, and the humidity sensitive film is sealed in the capillary glass tube. The end face of one end of the prepared bare fiber is placed in a physical vapor deposition device to be coated, and the humidity sensitive film on the end face of the bare fiber is prepared. The capillary glass tube is taken, the coated bare fiber is placed in the capillary glass tube in a suspended mode, and the two ends of the capillary glass tube are fixed and packaged through the ultraviolet curing glue. During packaging, the temperature and the humidity in an environment and the temperature and the humidity in the capillary glass tube are recorded, and the sensitive range of the humidity sensitive film cannot be exceeded. The optical fiber temperature sensor has the advantages that miniaturization is achieved, batch production is achieved, and potential cost is low; a manufacturing method of the temperature sensor is simple and easy to operate; accurate temperature measurement can be achieved through the temperature sensor.

Description

technical field [0001] The invention belongs to the intersecting field of optical fiber sensing technology, material science and optoelectronic technology, and specifically relates to an optical fiber temperature sensor based on a porous film and a preparation and measurement method thereof. Background technique [0002] Fiber optic sensors have been extensively studied in many fields in recent years. National defense technology, aerospace, power generation and transformation, textile, food, medicine, storage, agriculture and other industries have very strict requirements on humidity. The main indicators such as the environmental adaptability of the humidity sensor and the measurement range, response speed, and measurement accuracy Also getting higher and higher. Traditional capacitive, resistive and other electrical humidity sensors have poor long-term stability and interchangeability, cannot work in severe pollution and strong electromagnetic interference environments, an...

AI Technical Summary

Problems solved by technology

Traditional capacitive, resistive and other electrical humidity sensors have poor long-term stability and interchangeability, cannot work in severe pollution and strong electromagnetic interference environments, and can only measure at a single point.

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