Preparation method of sensor probe for integrated measurement of hydrogen concentration and temperature

Abstract

The invention relates to a method for preparing a sensor probe for the integrated measurement of hydrogen concentration and temperature. A hydrogen sensor probe is prepared by combining a Pt surface-modified doped WO3 hydrogen sensitive material with a sensing grating; a temperature sensor probe is prepared by combining a catalyst-free doped WO3 with a reference grating. , and perform temperature compensation on the sensing grating. This invention uses Pt surface modified WO3 as a hydrogen sensitive material, and by doping SiO2 modification in WO3, the service life of the hydrogen sensitive material is enhanced; the use of SiO2 grooves as the carrier of the hydrogen sensitive material can effectively prevent the hydrogen sensitive material from falling off . Capillary tubes are further protected on the sensing grating and reference grating, and the sensing grating and reference grating are fixed on the SiO2 substrate to ensure the linearity of the temperature coefficient of the grating and to measure the hydrogen concentration and ambient temperature at the same time. At the same time, the integrated packaging structure of the sensor probe is designed to ensure the reliability and stability of the sensor probe. This invention has important application value.

Description

technical field [0001] The invention belongs to the interdisciplinary field of optical fiber sensing technology, material science and optoelectronic technology, relates to the preparation of functional materials and photoelectric detection technology, in particular to Pt surface modification doped with WO 3 The preparation technology of the hydrogen sensitive material and the packaging method of the fiber grating hydrogen sensor probe. Background technique [0002] With the intensification of environmental pollution and the consumption of traditional energy sources, the human demand for clean energy is particularly urgent. Hydrogen is an important clean energy and chemical raw material, which is widely used in aerospace, fuel cells, metal smelting, and chemical synthesis. Since hydrogen has the smallest molecule, it is easy to leak. Any facilities related to hydrogen production, storage, transportation and use may have hydrogen leakage, which may lead to explosion accidents...

AI Technical Summary

Problems solved by technology

Traditional electrochemical hydrogen sensors use electrical signals as detection signals, which are difficult to meet the requirements of intrinsic safety

Images