A Reflective-Mode Phase-Variation Displacement Sensor

A Differential Reflective Intensity Optical Fiber Angular Displacement Sensor

In this paper, a novel differential reflective intensity optical fiber angular displacement sensor was proposed. This sensor can directly measure the angular and axial linear displacement of a flat surface. The structure of the sensor probe is simple and its basic principle was first analyzed according to the intensity modulation mechanisms. Secondly, in order to trim the dark output voltage to...

Displacement Parameter Inversion for a Novel Electromagnetic Underground Displacement Sensor

Underground displacement monitoring is an effective method to explore deep into rock and soil masses for execution of subsurface displacement measurements. It is not only an important means of geological hazards prediction and forecasting, but also a forefront, hot and sophisticated subject in current geological disaster monitoring. In previous research, the authors had designed a novel electro...

Guided resonance reflective phase shifters

We present reflective phase shifters based on high contrast gratings resting on a low-index spacer backed by a metallic mirror. The guided resonance of the grating combined with the reflection from the metallic mirror leads to an all-pass filter with 2π phase shift variation and unity reflectivity across the resonance. We present simulations, fabrication and measurement of passive devices fabri...

A Novel Displacement Sensor for Magnetic Levitation

Magnetic levitation is a technique to suspend an object without any support other than that of a magnetic field. The technique finds application in various fields where friction or abrasion between metallic surfaces (like bearings) or products of friction are detrimental to the environment or to the rubbing surfaces themselves. In a simple configuration, an electromagnet is used to lift up a fe...

Optomyography: Detection of muscle surface displacement using reflective photo resistor