A multichannel heterodyne fiber optic vibrometer is demonstrated which can be operated at ranges in excess of 50m. The system is designed to measure periodic signals, impacts, rotation, 3D strain, and vibration mappin...A multichannel heterodyne fiber optic vibrometer is demonstrated which can be operated at ranges in excess of 50m. The system is designed to measure periodic signals, impacts, rotation, 3D strain, and vibration mapping. The displacement resolution of each channel exceeds 1 nm. The outputs from all channels are simultaneous, and the number of channels can be increased by using optical switches.展开更多
A conceptual coaxial Pitot tube （PT） has been developed using fiber optic sensors combined with actuators to monitor and maintain its correct operation under different environmental conditions. Experiments were perf...A conceptual coaxial Pitot tube （PT） has been developed using fiber optic sensors combined with actuators to monitor and maintain its correct operation under different environmental conditions. Experiments were performed showing that the dynamic and static tubes can be cleared of ice. It was also demonstrated that the dynamic tube could be cleared of dust and sand which was not the case for the static tube in the coaxial configuration. An approach was proposed to overcome this problem involving a conventional configuration where the static tube was operated independently orthogonal to the dynamic tube, and a second set of sensors and actuators was used. Sensors and associated actuators were developed for temperature and intensity for a linear PT. The aim of this work is to propose a solution for a problem that has caused the loss of the lives of many passengers and crew of aircraft. Resources were not available to test a full implementation of a PT incorporating the proposed modifications.展开更多
Introduction In this special issue of Photonic Sensors the research activities of some of the （ex） members of the Applied Optics Group （AOG） at the University of Kent （UoK） will present brief details of their re...Introduction In this special issue of Photonic Sensors the research activities of some of the （ex） members of the Applied Optics Group （AOG） at the University of Kent （UoK） will present brief details of their research in AOG and then describe in greater lengthdetails of their careers since leaving the University. The research group has made significant contributions to many areas of ＂Fiber Optic Sensors＂ （FOS） as indicated in the ＂star diagram＂ below. This review is in recognition of the important advances made at AOG in the field of FOS and I was asked by Professor Y. Rao to organize it.展开更多
文摘A multichannel heterodyne fiber optic vibrometer is demonstrated which can be operated at ranges in excess of 50m. The system is designed to measure periodic signals, impacts, rotation, 3D strain, and vibration mapping. The displacement resolution of each channel exceeds 1 nm. The outputs from all channels are simultaneous, and the number of channels can be increased by using optical switches.
文摘A conceptual coaxial Pitot tube （PT） has been developed using fiber optic sensors combined with actuators to monitor and maintain its correct operation under different environmental conditions. Experiments were performed showing that the dynamic and static tubes can be cleared of ice. It was also demonstrated that the dynamic tube could be cleared of dust and sand which was not the case for the static tube in the coaxial configuration. An approach was proposed to overcome this problem involving a conventional configuration where the static tube was operated independently orthogonal to the dynamic tube, and a second set of sensors and actuators was used. Sensors and associated actuators were developed for temperature and intensity for a linear PT. The aim of this work is to propose a solution for a problem that has caused the loss of the lives of many passengers and crew of aircraft. Resources were not available to test a full implementation of a PT incorporating the proposed modifications.
文摘Introduction In this special issue of Photonic Sensors the research activities of some of the （ex） members of the Applied Optics Group （AOG） at the University of Kent （UoK） will present brief details of their research in AOG and then describe in greater lengthdetails of their careers since leaving the University. The research group has made significant contributions to many areas of ＂Fiber Optic Sensors＂ （FOS） as indicated in the ＂star diagram＂ below. This review is in recognition of the important advances made at AOG in the field of FOS and I was asked by Professor Y. Rao to organize it.
