A Fiber Optic Acoustic Pyrometer for Temperature Monitoring in an Exhaust Pipe of a Boiler

This letter presents a fiber optic acoustic pyrometer for temperature monitoring in an exhaust pipe of an industrial scale combustion test facility. The acoustic pyrometer consists of a fiber optic acoustic generator and a Fabry–Perot (FP) fiber sensor receiver. The proposed acoustic pyrometer was tested and verified at an exhaust pipe over the Industry Scale Burner Facility (ISBF) at GE’s Clean Energy Center, at a temperature of 320 °C. Further research on such fiber optic acoustic pyrometers will advance the study of 2D/3D temperature distribution reconstruction in industrial combustion facilities.