In this work, the optical multi-stability is utilized in a deflection sensor element. We have found that a simple sensor, which consists of two cascaded Fabry-Perot resonators, has a novel memory property, besides having the ability to obtain instant deflection measurements. The essential operation of this device is conducted by an optically nonlinear refractive index change in the second reson...

Abstract Keramasan Bridge 2 is a bridge with an age of more than 30 years, so it necessary to review its feasibility and serviceability. Based on visual observations, there are signs cracks in the transverse longitudinal directions floor. results loading test, stated that deflection girder has exceeded allowable deflection, cause floor crack caused by non-uniform vertical movement girder. this,...

The present paper peruses MEMS based piezoresistive pressure sensor and its fabrication techniques. Simulation of the pressure sensor is done by using COMSOL Multiphysics software for P-type silicon piezoresistor. The deflection of N-type silicon diaphragm depends upon the Young’s modulus of the material and varies with the amount of force applied to the diaphragm. The simulation result emphasi...

The validity of the dynamic analysis based on simplified plate model was investigated using of FE-codes ANSYS in the present paper. The simplified clamped multilayered plate model was first verified by comparison with the exact model. The simply supported plate model was confirmed to be not a suitable model due to its large error as comparing with exact model. Influence of dimensions of lamina...

In this study, the effects of mesa dimensions on sensor response in diaphragm-based Fabry-Perot fiber optic sensors (FOSs) were investigated detail. Mesa diaphragms, also called center-embossed have been discussed sufficiently literature, but effect thickness performance has not Moreover, there is no precise analytical solution for such diaphragms. For reason, diaphragms with different thicknes...

The aim of this work was to develop an eddy current type pressure sensor and investigate its fundamental characteristics affected by the mechanical and electrical design parameters of sensor. The sensor has two key components, i.e., diaphragm and coil. On the condition that the outer diameter of sensor is 10 mm, two key parts should be designed so as to keep a good linearity and sensitivity. Ex...

The manufacture of miniature Stirling cycle cryocoolers, using standard micro-machining techniques and materials has been pursued by the authors [1]. A MEMS based cryocooler would allow integration of a cryogenic cooling system directly into a cryoelectronic device. Resonant bossed diaphragms were proposed as the means to sweep the working gas in the Stirling cooler, replacing the pistons and d...

This paper discusses the fabrication and testing of two lowvoltage force-balanced pressure sensors. In these devices the force acting on a diaphragm under external pressure and its corresponding deflection are counterbalanced with the force and deflection generated in a parallel plate electrostatic actuator mechanically coupled to the diaphragm. The low balancing voltage is attained using a for...