Abstract
Insoluble liquids show layers such as water and oil. The detection of the exact interface locations and the level changes for layered liquids are of paramount importance for chemistry purifications, liquid storage in reservoirs, oil transportation, and chemical engineering. However, accurately measuring liquid layers is challenging. This paper introduces a multi-parameter sensing device based on a long-period fiber grating (LPFG) sensor simultaneously detecting boundary and level changes of layered liquids. Laboratory experiments demonstrated that the sensor device would respond to the liquid interface change as a sharp and sudden resonant wavelength change, while it would show a gradual and steady resonant wavelength change to the level changes of layered liquids. The lab experiments also showed that the sensor device has a higher sensitivity when a higher LPFG cladding mode is used.
Highlights
For chemical processing, purification, storage, and transportation, it is critical to know whether unwanted liquids are present
If unwanted insoluble liquids exist, it becomes essential to locate the interface between the layered liquids and monitor the level change of each layer in real time
Sensor devices to detect level changes of liquid have been in place for decades
Summary
Purification, storage, and transportation, it is critical to know whether unwanted liquids are present. The level sensors have been widely investigated and, to date, limited technologies can detect interfaces between layered insoluble liquids. Recently the authors introduced LPFGs for layered liquid detection [22], limited tests were performed to show its reliability To meet this challenge, this study (1) systematically investigated the operational principle and feasibility of the LPFG-based sensing device for boundary detection between layered liquids, (2) advanced the measurements to multiple parameter detection of layered liquids with both the interfaces and the level changes of layered liquids, (3) validated the multi-parameter sensing through well-designed laboratory tests; and (4) performed sensitivity study on the sensor device for the rod diameter, material, and LPFG cladding modes selection. The paper is organized as follows: Section 2 discusses the sensor operational principle and device design; Section 3 explains the experimental setup; Section 4 conducts experiments to validate feasibility and effectiveness of multi-parameter sensing; Section 5 performs a sensitivity study of the sensor device through laboratory experiments; and Section 6 concludes the study and lay out its potential future work
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
