What is it about?
This paper is about a sensor for pressure measurements,compensated for temperature. It embeds two FBGs in a transducer designed to induce large strain to one of the FBGs when the sensor is exposed to pressure. The other FBG is used for the temperature compensation. The transducer and the case are entirely 3D-printed.
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Photo by Kelly Sikkema on Unsplash
Why is it important?
The pressure sensitivity of this sensor is found as high as 240 pm/kPa with an accuracy of 112 Pa over 10 kPa, which makes this sensor up to 80,000 times more sensitive than a bare fiber Bragg grating. Moreover, it is capable of detecting fast dynamic pressure change up to 100Hz. The sensor transducer can be adapted to other ranges and with different sensitivity, by modifying the design geometric parameters and the material.
Perspectives
This work shows how 3D-printed technology can be used in optical fiber sensors prototyping, to validated designs and approaches. For example, this work originates a further development of the sensor into a real-field one, where the inner transducer was still 3D-printed. Furthermore, during this work, we had to deal with several issues related to materials and cements, which are testified in the manuscript, as well.
Dr Luca Schenato
National Research Council Italy
Read the Original
This page is a summary of: Highly Sensitive FBG Pressure Sensor Based on a 3D-Printed Transducer, Journal of Lightwave Technology, September 2019, Institute of Electrical & Electronics Engineers (IEEE),
DOI: 10.1109/jlt.2019.2919917.
You can read the full text:
Resources
Design and field testing of a fiber optic pressure sensor for underground water level monitoring
Paper about the rugged field-sensor based on this first work.
Domino - Dikes and Debris Flows monitoring by innovative fiber optic sensors
The project in which framework this work has been carried out.
Draft version of the manuscript
Researchgate versoin
Contributors
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