Development of friction-induced triboluminescent sensor for load monitoring

Abstract

Real-time load monitoring of critical civil and mechanical structures especially dynamic structures such as wind turbine blades is imperative for longer service life. This article proposed a novel sensor system based on the proprietary in situ triboluminescent optical fiber (ITOF) sensor for dynamic load monitoring. The new ITOF sensor patch consists of an ITOF sensor network with micro-exciters integrated within a polymer matrix. The sensor patch was subjected to repeated flexural loading and produced triboluminescent emissions due to the friction between micro-exciters and ITOF sensors corresponding to each loading cycle. The friction-induced triboluminescent intensity directly depends on the loading rate, the coefficient of friction, and the applied load on patch. In general, the triboluminescent intensity increases exponentially with an increase in load. Additionally, the sensor patches comprising the coarser micro-exciters exhibited better results. Similarly, better results were achieved at higher loading rates although a threshold loading rate is required to excite the triboluminescent crystals for this sample configuration. The proposed new sensor has the ability to monitor dynamic continuous applied loads.

Synergistic effect of the anti-solvent bath method and improved annealing conditions for high-quality triple cation perovskite thin films

“…The development of a more stable self-powered photodetector with rapid response time is of paramount importance for the development of structural health monitoring and in situ damage sensors. [44][45][46][47][48][49][50] The device followed the p-i-n structure using FTO/compact TiO 2 (c-TiO 2 )/Cs 0.05 FA 0.16 MA 0.79 PbI 2.7 Br 0.3 / spiro-OMeTAD/Au as shown in the schematic in Fig. 5a.…”

Triboluminescence: Materials, Properties, and Applications

“…The proposed SrAl 2 O 4 :Eu 2+ -based sensor under UV irradiation could stably sensitize the applied load both in dynamic and static states (Figure 6) [41]. Differing from SrAl 2 O 4 :Eu 2+ , ZnS:Mn/Cu showed almost no TL intensity degradation along with the increase of cycle numbers because of the piezoelectric effect, which could be directly used for impact/load sensor applications without needing an extra UV irradiation [37,55].…”

A flexible pressure sensor with interference immunity capability

“…Flexible sensor arrays are increasingly being used for various applications involving wearable devices and reconfiguration of sensory functions. According to response principles, flexible sensor arrays can be mainly divided into resistive type (Gong et al, 2021;Ghosh et al, 2020;Yue and Moussa, 2018), piezoelectric type (Wang et al, 2021a(Wang et al, , 2021b(Wang et al, , 2021cTian et al, 2020;Lin et al, 2021), capacitive type (Marco et al, 2019;Sotgiu et al, 2020;Wang et al, 2022;Ye et al, 2018) and friction power generation type (Liu et al, 2017a(Liu et al, , 2017bWang et al, 2019;Shohag et al, 2018). It is worth noting that sensor arrays sharing the same substrate inevitably induce mutual influence.…”