Pump group state monitoring method and device based on fiber grating sensing

Abstract

The invention provides a pump group state monitoring method and device based on fiber grating sensing. The device comprises a fiber grating sensor set arranged on a pump, wherein the fiber grating sensor set is connected with a fiber grating interrogator through optical fibers, the output end of the fiber grating interrogator is connected with an analyzing and processing device which is further connected with an alarm device, and the fiber grating sensor set comprises a fiber grating temperature sensor and a fiber grating vibration sensor. According to the pump group state monitoring method and device based on fiber grating sensing, a fiber grating is used as a sensing element, electric equipment is not used in a work site, dangers caused by electric factors are effectively avoided, requirements for site environments are low, and using in a severe environment can be realized; the optical fibers serve as not only sensitive elements but also optical signal transmission media, so that low-loss remote transmission of signals is achieved; the fiber grating vibration interrogator is provided with a compensation unit which can be used for compensating output signal loss caused by light source change and line loss, and vibration measurement accuracy can be improved.

Description

technical field [0001] The invention belongs to the field of state monitoring, repair and maintenance of mechanical equipment where optical fiber sensing technology is applied, and relates to a method and device for detecting parameters such as vibration and temperature of machine pump state detection parameters using optical fiber sensing technology. Background technique [0002] Petroleum and chemical companies are equipment-intensive industries that rely heavily on equipment, and chemical equipment has the following characteristics: high automation level, strong production continuity, high temperature, high pressure, flammable, explosive, corrosive, and poisonous Once the equipment has a problem or even leaks, it will pollute the environment, damage the human body, increase losses, and even cause major accidents such as fire, explosion, and personal casualties; often a piece of equipment, a pipeline, a piece of instrument, or even a Failure of electronic components will l...

AI Technical Summary

Problems solved by technology

After 2000, people began to study the application of this technology in the field of vibration detection of mechanical equipment, and achieved certain research results, but the fiber grating acceleration sensors used in these researches and applications are all unidirectional, and in actual detection, such as The monitoring of pumps often requires monitoring the acceleration in three directions. At this time, if you use traditional acceleration sensors, you need at least three. It cannot be installed on the same monitoring point, and eventually the obtained data cannot truly reflect the acceleration values ​​in different directions of the monitoring point

So far, there are few research reports on 3D fiber-optic acceleration sensors, especially the research on 3-D fiber-optic grating acceleration sensors that can be used for vibration monitoring of mechanical equipment has not been reported, so the study of 3-D fiber-optic acceleration sensors has innovative and important application value

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