Liquid level measurement device and method

Abstract

The invention discloses a liquid level measurement device and method and relates to liquid level measurement. The device is provided with a light source, a three-port circulator, a spectrograph, a liquid container to be measured and a liquid level sensor. The sensor is inserted into the liquid container to be measured, the other end of the sensor is connected with a first output port of the circulator, the light source is connected with the input end of the circulator, and a second output port of the circulator is connected with the spectrograph; signal light enters the circulator and then is output through the first output port of the circulator; after the signal light reaches the sensor, interference occurs at the position of a fiber bragg grating through reflection of a silver film; reflected light re-enters the circulator through the first output port of the circulator and then is output to the spectrograph through the second output port of the circulator, and the spectrum of the output light can be obtained by measuring the spectrum of the reflected light; the relation between the height of the outside liquid level and the wavelength of interference fringes can be obtained by measuring the drifting of the wavelength of the interference fringes through the spectrograph, and liquid level height can be measured through spectrum analysis. By the adoption of the liquid level measurement device and method, continuous liquid level measurement is realized, measurement accuracy is high, and safety performance is high.

Description

technical field [0001] The invention relates to liquid level detection, in particular to a liquid level detection device and a detection method thereof. Background technique [0002] Liquid level measurement technology has a very wide range of applications in the engineering field. In the production process of modern enterprises, it is required to have a wide range of measurement objects, high measurement accuracy, good reliability and practicability, and it must be suitable for measurement in special environments, such as the measured liquid is corrosive and flammable Explosiveness. This puts forward higher requirements for liquid level measurement technology. Optical fiber sensing technology has the advantages of small size, light weight, high sensitivity, remote measurement and corrosion resistance, and is suitable for flammable and explosive measurement occasions. Therefore, it is very important to develop a large-scale continuous liquid level measurement method based ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of poor measurement accuracy, poor stability, and easy to be affected by the measurement environment of the existing liquid level measurement method, to provide continuous measurement of the liquid level, which has high measurement accuracy and good safety, and can be used in harsh measurement conditions. A liquid level detection device and its detection method functioning in the environment

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