In the present research work, a smart GNP sensor has been designed for measuring thermal signatures in structures. This smart sensor is fabricated by doping graphene nano-platelet(GNP) into Polymethyl methacrylate (PMMA), and a thin film layer is spray-coated onto a glass fiber reinforced polymer (GFRP) composite specimen and metals, to monitor the passive temperature. GNP coated lycra textile sensor has also been developed for human health monitoring.

The surface temperature of structures was also studied with an IR camera. It was observed that the surface coated GNP sensor emits good thermal signature than without coating GNP sensor. Stresses developed due to mechanical loading leads to rise in temperature of structures and this temperature was captured by smart sensors.

Similarly, this sensor has also been used in aluminum samples for crack monitoring potential in terms of thermal signature and piezo-resistivity. The increased percentage of temperature was quite higher after coating the GNPs/PMMA sensor than without coating the GNPs.

In the case of smart denim textile sensors, the sensing ability of sol-gel coated GNP textile with the same weight percentage helps in sensing edema, neck and bicep locomotion. It is experimentally proved that a GNP-based sensor acts as a promising indicator for health monitoring of GFRP, metals and human health monitoring.