Gas pressure monitoring system based on optical fiber white-light interference measuring technology

Abstract

The invention provides a gas pressure monitoring system based on an optical fiber white-light interference measuring technology. The system comprises a white-light interference demodulator, an opticalfiber topology network and a gas pressure sensor set, the white-light interference demodulator comprises a white-light light source, a first optical fiber circulator, a second optical fiber circulator, a first optical fiber semi-reflecting mirror, a reflector, a first self-focusing lens, a stepping motor, a data acquisition card, a photoelectric detector and a computer, the optical fiber topologynetwork is formed by connection of optical switches or multiple channels of shunts in a tree-shaped structure, the gas pressure sensor set comprises a plurality of same gas pressure sensors, and eachgas pressure sensor comprises an elastic film, a reflective coating, a sensor housing, standard gas pressure inert gas, transparent glass, a second optical fiber semi-reflecting mirror and a second self-focusing lens. According to the gas pressure monitoring system based on the optical fiber white-light interference measuring technology, the gas pressure in a pressure container is monitored by employing the optical sensors so that the system is more applicable to pressure monitoring of gas pressure containers in severe conditions.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a gas pressure monitoring system based on optical fiber white light interferometry technology. Background technique [0002] Gas pressure monitoring is one of the important monitoring contents in industrial engineering safety monitoring. It is widely used in absolute height monitoring, internal pressure monitoring of gas pressure vessels, and leakage prevention monitoring of gas storage containers. In the air pressure monitoring problem of pressure vessels in the environment of high temperature, strong acid and alkali, and strong electromagnetic field, due to the natural aging and corrosion speed of the container, the compressive strength of the rust point decreases, or the air tightness decreases, which will cause the performance of the pressure vessel to decline. . Therefore, the internal pressure monitoring of gas pressure vessels and the anti-leakage monitoring...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem in the prior art that it is difficult to measure gas pressure in a strong electromagnetic field environment

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