Fiber Optic Speed Sensor Manufacturers

A fiber optic speed sensor is used for sensing the rotational speed of an N bladed fan in a turbo-machine application including a polarization-preserving optical circuit positioned adjacent the locus described by the remote ends of the blades. It has been developed, bench tested and rig tested in a real turbine airflow environment. It employs an innovative design using a pressure tube and fiber optic micro bend transducer in order to capture turbine blade pass wake frequency. A signal processor into turbine rotational speed can convert the blade pass frequency. The FOSS offers unique potential to meet future requirements for performance (0 to 25KHz) and environmental tolerance.