Dark pool liquid level measuring system and methodbased on strained layer aroundbragg grating

Abstract

The invention discloses a dark pool liquid level measuring system and method based on a strained layer around a bragg grating. The measuring system comprises fiber bragg grating liquid level sensor assemblies, a fiber grating demodulator, a junction box and a data processing system. The fiber bragg grating liquid level sensor assemblies are buried in a dark pool, tail fiber of the fiber bragg grating liquid level sensor assemblies is connected to the fiber grating demodulator, detected central wavelength data are transferred by the fiber grating demodulator to a data processing system to compare with central wavelength data of the corresponding bragg grating, the bragg grating with the largest variation in wavelength is located in sensing area immersed in liquid and the closest to a liquidsurface and a liquid level of the liquid in the dark pool is determined according to a position between sensing areas. The dark pool liquid level measuring system is used for measuring the liquid level in the dark pool of sponge cities complex and has the advantages of anti-electromagnetic interference, long measuring distance and good signal stability, is suitable for long-term work under bad working environment, and has important value for grasping the real-time situation of rain water in sponge cities.

Description

technical field [0001] The invention belongs to the technical field of liquid level measurement, and in particular relates to a dark pool liquid level measurement system and method based on a strained layer around a Bragg grating. Background technique [0002] Sponge city is a new product of Internet of Things technology and smart city development. At present, the online monitoring of sponge cities based on the Internet of Things has become a hot spot. It integrates the concept of smart cities into the sponge city, and uses information technologies such as the Internet of Things, sensors, cloud computing, and big data. The coordinated implementation of water resources, green facilities and sponge city construction will make the construction and management of sponge cities more efficient and intelligent. Among these technologies, sensing technology is the most basic and important key technology. Because if the sensing signal is unstable and the large amount of data collecte...

AI Technical Summary

Problems solved by technology

Sponge city is a new type of urban stormwater management system. The traditional electromagnetic sensing technology has disadvantages such as weak anti-interference, poor signal stability, difficult long-distance transmission, and inconvenient large-scale networking, which makes the functions of the online monitoring system unavailable. Effective, not good enough for level detection

Images