Research on one-piece structure target flow sensing technology based on fiber Bragg grating

Abstract

Abstract:In view of problems existing in the detection of the traditional hydraulic system, such as the large volume of sensor and the low measurement accuracy, a new one-piece target type flow sensor is designed and researched based on fiber Bragg grating (FBG). A compact structure is designed, which is convenient to be dismantled, processed, and installed, based on the analysis of the principle of FBG and the structure of target type flow sensor. The force of target put in fluid flow is turned into the FBG wavelength drift, with a corresponding relationship. The problem on the cross sensitivities of the temperature and strain is solved effectively by using double FBG symmetrically pasted on the both surfaces of the cantilever. The impact on the fluid state is analyzed through simulation in the software FLUENT, and the results show that the impact was smaller than that of the traditional structure. The results of experiments in the hydraulic system show that there is a good linear relationship between the change in the dual FBG central wavelength and mass loading on the target sheet has a good linear relationship, and the sensitivity is twice that of a single FBG sensitivity.

Intelligent information processing of fiber Bragg grating biosensor for stress monitoring in microfluidics system

“…Wang et al established a circular target flow measurement system binding FBG [10]. Liu et al developed a flow sensor with a one-piece structural design, which using double FBG, solved the cross-sensitivity problem of temperature and strain [11]. However, there is no suitable FBG sensing system that can be used for microchannel directly, and an ideal non-invasive method is needed.…”

Neural network‐based target‐type flowmeter for high‐velocity liquid flow measurement

“…0.403 pm/LPH for a range of 0-3600 LPH. Liu et al [11] have developed a new one-piece target-type flow sensor based on fibre Bragg grating. The wavelength shift is caused by the force, which acts on the target area of the target flowmeter.…”