Optical fiber hydrogen-senstive sensor, preparation method and hydrogen leakage detection device

Abstract

The invention discloses an optical fiber hydrogen-sensitive sensor, a preparation method and a hydrogen leakage detection device, the optical fiber hydrogen-sensitive sensor comprises an optical fiber sensor and a hydrogen-sensitive film coating an optical fiber sensing area of the optical fiber sensor, and the raw material formula of the hydrogen-sensitive film comprises a hydrogen-sensitive material and a binder, the hydrogen-sensitive material is one or a combination of more of a titanium dioxide hydrogen-sensitive material and a tungsten trioxide hydrogen-sensitive material; wherein the titanium dioxide hydrogen sensitive material comprises tetrabutyl titanate and PdCl2, and the mass ratio of the tetrabutyl titanate to the PdCl2 is 190-200: 1; the tungsten trioxide hydrogen sensitive material comprises WO3 and lanthanum nitrate, wherein the molar ratio of lanthanum to W is 1: 100-1: 40. According to the optical fiber hydrogen-sensitive sensor disclosed by the invention, a hydrogen-sensitive film and an optical fiber micromachining technology are fused, a software monitoring system is developed, full-coverage blind-area-free real-time monitoring is realized, and the problems that the number of detection blind areas in a local area is large, leakage cannot be found in time, and the workload of manual inspection is large are solved.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to an optical fiber hydrogen sensitive sensor, a preparation method and a hydrogen leakage detection device. Background technique [0002] In China's first "Energy Law" (draft for comments) in 2020, hydrogen energy is listed as an energy category. This is the first time that China has legally confirmed that hydrogen energy is an energy source. Currently, research and application of hydrogen as a clean energy are in full swing. , and more and more hydrogen fuel cell vehicles have entered various fields. One of the core issues in the use of hydrogen energy is: how to ensure the safety of hydrogen use and storage, so timely and rapid detection of hydrogen leakage has become an important issue. one ring. [0003] Traditional hydrogen leak detection methods include conventional hydrogen sensors, portable detection leak detectors, portable acoustic leak detectors, soapy water, etc., ...

AI Technical Summary

Problems solved by technology

[0003] Traditional hydrogen leak detection methods include conventional hydrogen sensors, portable detection leak detectors, portable acoustic leak detectors, soapy water, etc., but they all have certain limitations. There are time blind spots in manual inspections, heavy workload, and artificial Judgment of color standard inconsistency and other issues, such as the conventional hydrogen sensor is a distributed product, which monitors the hydrogen in the air and then sends out a leak signal, which is expensive and can only be installed in a distributed manner, with many monitoring blind spots, and the leak point cannot be found immediately; portable detection type Leak detectors are highly portable and cheap, but the detection efficiency is low and manual use is required; portable sonic leak detectors are easily disturbed by other sounds, and subtle leaks cannot be detected, so manual use is required and the efficiency is low; soapy water can detect fine leaks Leak point, but it is inconvenient to use, and there is a safety hazard in the scene with electrical equipment

Images