FBG is used to construct pH and strain fiber optic sensors to realize online detection of oxalic acid corrosion process of sandstone artifacts. The pH fiber optic sensor uses a PVA/PAA hydrogel as the sensitive material and the fiber optic is held in a half-open PTFE tube by a UV adhesive. The de-coated FBG is fixed to the surface of the relics with epoxy resin to detect strain in the relics. The research results of this paper will provide an important reference for analyzing the acid dissolution corrosion mechanism of stone cultural relics and preventive protection of cultural relics, and promote the scientific and technological development and engineering application of physicochemical FBG sensors.
Hydrogen energy is a renewable clean energy source with strong potential, which comes from a wide range of sources and produces no pollutants during the combustion process. Photoelectrocatalytic (PEC) hydrogen production utilizes solar energy as the main energy for photoelectrochemical reaction to produce hydrogen, which is green and environmentally friendly. Most of performance tests of PEC hydrogen production systems still remain on the overall performance test, neglecting the influence of microscopic particles with different positions and different concentrations on the surface of the photocatalytic membrane on the hydrogen production performance. Here, we use surface plasmon resonance tilted fiber Bragg grating (SPR-TFBG) sensors, fiber Bragg grating hydrogen (H-FBG) sensors, and fiber Bragg grating temperature (T-FBG) sensors for real-time in-situ monitoring of surface ion concentrations, hydrogen concentrations, and temperatures at different locations on the surface of the photoelectrode of a PEC hydrogen production system. A positive correlation was found between the ion concentration on the photoelectrode surface and the amount of hydrogen production, which indicates that real-time monitoring of the ion concentration on the surface of the photo-electrode can effectively reflect the performance of hydrogen production at different locations on the surface of the photoelectrode.
In this work, we introduced a polymer-based fiber Bragg grating sensor for carbon dioxide (CO2). The device integrates a polymer coating on the fiber Bragg grating sensor as a CO2-sensitive region, and then a hydrophobic zeolite is coated on the surface to isolate water vapor interference. To eliminate the effect of temperature on the sensor detection performance, an uncoated fiber Bragg grating was introduced as a temperature compensation unit. Then, a CO2 detection system was constructed to simulate the carbon sequestration environment to calibrate the CO2 concentration for sensors and to analyze the sensor performance under different environmental conditions. The experimental analysis shows that the fiber Bragg grating CO2 sensor not only has high CO2 sensitivity, but also has excellent reversibility and stability in high temperature and high humidity environments.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.