Based on the thin-wall cylindrical shell,a new fiber Bragg grating(FBG) sensor to measure the temperature and the pressure simultaneously is proposed by using dual FBGs.Two gratings are stuck to the outer surface of the cylindrical shell with nonuniform thickness along the axial direction.The gratings have similar temperature responses but different strain responses,so the simultaneous measurement can be realized.The experimental results show that the pressure sensitivity coefficient and temperature sensiti...