Modeling and Optimization of MOEMS Devices for Automotive Crashworthiness Structural Application

Abstract

Ensuring occupant safety is one of the main requirements of any vehicle. The major cause of demise in majority of countries is by road accidents. Supporting self-control of automobile apparatus plays pivot behavior in precluding accidents and safeguarding the travelers as well as the person who drives a vehicle and thereby provides protection against serious injuries. So low energy consuming sensor with precise and high sensitivity sensing is much required. The present work is to design PhC stationed optical approach accelerometer sensors for Vehicle Safety and Crashworthiness. newlineOptical MEMS (Micro-Electro-Mechanical-Systems) based micro accelerometer integration of mechanical, electronics and optical system is having ability to sense and convert many physical quantities. Hole is the simplest optical element of Photonic Configuration and from these sub wavelength technology evolved towards longer wavelengths of the electromagnetic spectrum. Established productiveness of MOEMS instrument is accomplished via four free ends of slab. By utilizing MEEP software, holes in slab configuration horizontal displacement of main slab are achieved. newlineThe main slab displacement will change the spacing besides altering the electromagnetic waves. The improved, electromagnetic waves shift the transmission spectrum wavelength. For every micro movement from 0 to 0.6 micrometre, modification of wavelength 0.001 is observed. Interconnection between optical and mechanical system evaluate, the acceleration of vehicle. MOEMS (Micro Opto Electro Mechanical Systems) complete integration of photonic waveguides, semiconductors, light sources and data monitors. Because of MOEMS devices having variety of benefits like insensitive to electromagnetic interference, reduction in size, Process able to mass production, miniaturized sizes it can be usable in many advanced science and technology product like biomedical systems, agricultural sensing system, newlineDeveloped MOEMS based sensor in the field of Biomedical System, Health Monitoring based intelligent sensor and aerospace for structural monitoring, and Automobile safety has revolutionized human life to high level of living. MOEMS based sensing system undergoes sophisticated fabrication process. Most of MOEMS devices undergo wet etching and dry etching is the bulk micro machining processes. Most effort towards development of micro accelerometer based MEMS techniques have seen from last decades. newlineii newlineA great variety of MOEMS based devices such as pressure sensor; displacement sensor and accelerometer sensor are in developing stage. In micro accelerometer, based optical MEMS mainly consist of mass block and movable system and sensing system. Mass block which is vibrating due to acceleration and sensing finger attached to vibrating block is undergoes continuous deflection. Sensing finger is deflecting in the waveguide region of optical systems will detect the changes from light media and provides the necessary output. newlineRemarkable frequency shift in photonic crystal configuration and high quality factor of 7212 is observed for the selection of silicon material. Analysis and optimization is carried for sensing structures in two configurations of nanostructure that affects the motion of photons termed Rods in air [Rod cells or photoreceptor cells] and holes in slab [photonic crystal fibers or holey fibers]. Proposed work will have extensive application in automobile and inertial navigation in future. newline