STUDY AND DESIGN OF LOW COST PRESSURE SENSORS FOR PREVENTING THEFT OF VEHICLE A Project Report Submitted in Partial Fulfillment of the Requirements for the Degree of Bachelor of Technology in Mechanical Engineering by GROUP M17 MECHANICAL ENGINEERING MOTILAL NEHRU NATIONAL INSTITUTE OF TECHNOLOGY ALLAHABAD, INDIA December, 2011
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
STUDY AND DESIGN OF LOW COST PRESSURE SENSORS FOR PREVENTING THEFT OF VEHICLE
A Project Report Submitted in Partial Fulfillment of the Requirements
for the Degree ofBachelor of Technology
inMechanical Engineering
byGROUP M17
MECHANICAL ENGINEERINGMOTILAL NEHRU NATIONAL INSTITUTE OF TECHNOLOGY
ALLAHABAD, INDIADecember, 2011
CERTIFICATE
Certified that the work contained in this titled “STUDY AND DESIGN OF LOW COST PRESSURE SENSORS FOR PREVENTING THEFT OF VEHICLE”, has been carried out under my supervision and that this work has not been submitted elsewhere for a degree.
Asst. Prof. S.B. MISHRAMechanical EngineeringMNNIT
Contents
INTRODUCTION
MEMS
APPLICATION OF MEMS
ADVANTAGES OF MEMS
MEMES BASED PRESSURE SENSOR DESIGN
VARIOUS RESPONSE OF PIEZORESISITIVE SENSOR
MECHANICAL DESIGN
]
Chapter 1
Introduction
Mems, micro electro mechanical systems, are the integration of electronic and mechanical components on micro level. These consists of sensor to obtain signals from the environment, electronic system provides logic and manipulation of signal obtained and finally actuators produce desired output.
This technology is targeted at devices that range in size from millimeters down to microns, and involve precision mechanical components that can be manufactured using semiconductor manufacturing technologies.A diverse range of application areas has been proposed, and applications developed for these devices include a wide range of sensor, fluid mechanics, optics, RF, storage, and biotechnology applications.
1.1 APPLICATION OF MEMS
MEMS are most popular in the automotive industry as accelerometers
for airbag systems. MEMS have many other uses besides airbag
systems, and not only for the automotive market. They also have
applications in industrial, military, and consumer markets.
Automotive Market: Airbag Systems
Vehicle Security Systems
Intertial Brake Lights
Headlight Leveling
Rollover Detection
Automatic Door Locks
Active SuspensionConsumer Market: Appliances
Sports Training Devices
Computer Peripherals
Car and Personal Navigation Devices
Active SubwoofersIndustrial Market: Earthquake Detection and Gas Shutoff
Machine Health
Shock and Tilt SensingMilitary: Tanks
Planes
Equipment for Soldiers
1.2 ADVANTAGES OF MEMS
They have proven to be a key enabling technology of developments in
areas such as transportation, telecommunications and health care, but the
range of MEMS applications covers nearly every field. The most
significant advantage of MEMS is their ability to communicate easily with
electrical elements in semiconductor chips. Other advantages include small
size, lower power consumption, lower cost, increased reliability and higher
precision.
(1) IC Technology used: Integrated multiple and more complex
functions on a chip, to form a monolithic system(sensors+processing+
actuators), Miniaturization with no loss of functionality, Improved