Optical fiber F-P cavity high-voltage sensor

Abstract

The invention discloses an optical fiber F-P cavity high-voltage sensor, which comprises a diaphragm body, an upper ceramic insertion core, a support cylinder, a mounting shell, a lower ceramic insertion core, an insertion core fixing cap, a guide positioning rod, an optical fiber, a protection sleeve and a fixing joint; the diaphragm body is fixed with the front end of the mounting shell to form a pressure sensing surface of the sensor; the upper ceramic insertion core is arranged in the support cylinder; the upper end surfaces of the upper ceramic insertion core and the support cylinder are level and are tightly contacted with the diaphragm body; a conical contact surface is adopted between the lower end surface of the support cylinder and the mounting shell; the lower ceramic insertion core (with a tail fiber) and the guide positioning rod are fixed together by the insertion core fixing cap and are arranged in the mounting shell; an F-P cavity is formed between the lower end surface of the upper ceramic insertion core and the upper end surface of the lower ceramic insertion core; the protection sleeve is screwed into the lower part of the mounting shell; the optical fiber with an optical fiber protection sleeve is fixed at the lower end of the protection sleeve by the fixing joint. The optical fiber F-P cavity high-voltage sensor is simple in structure, convenient and fast to manufacture and low in cost.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a large-range high-pressure high-frequency response sensor based on an optical fiber F-P cavity. Background technique [0002] Since the 1970s, along with the birth of low-loss optical fiber and the rapid development of optical fiber communication technology, optical fiber sensing technology has gradually developed into one of the high-tech countries in the world. Optical fiber sensors use light waves as information carriers and optical fibers as information transmission media to sense and measure measured parameters. It is precisely because of the difference between the optical fiber sensor and the traditional electronic sensor in the information carrier and transmission medium that the optical fiber sensor has the incomparable advantages of the traditional electronic sensor: 1) The optical fiber sensor is a passive device with good electrical insulation and resist...

AI Technical Summary

Problems solved by technology

However, at present, there are few optical fiber sensors that can be directly used for dynamic high-voltage measurement in harsh environments (such as high temperature, high pressure, strong electromagnetic interference, etc.), such as explosion shock wave pressure measurement in the field of military industry production and strategic and tactical weapon development.

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