Mini Project on Automated Vehicles for Physically Challenged People

Micro electro mechanical systems (MEMS) is the technology of the very small, and merges at the nano-scale into nano- electromechanical systems (NEMS) and nanotechnology. MEMS are also referred to as micro-machines or Micro Systems Technology - MST. MEMS are made up of components between 1 to 100 micrometres in size and MEMS devices generally range in size from 20 micrometres to a millimeter. They usually consist of a central unit that processes data, the microprocessor and several components that interact with the outside such as micro sensors. Due to MEMS large surface area to volume ratio, surface effects such as electrostatics and wetting dominate volume effects such as inertia or thermal mass.

This property is used to detect any motion or change in acceleration due to gravity or simply called G force. This project is having dual property role. It will be controlled by two ways. For visually impaired people the robot will move automatically. And for the disabled candidates it will be move according to the instructions given by the person through MEMs sensor. In second condition the mems sensor is attached to the wheel chair at the position of hands. While moving this sensor, wheel chair will moves automatically. This will be very useful for the old age people too because they don’t want to depend on others. The system uses a compact circuitry build around flash version of AT89S52 microcontroller with a non volatile memory. Programs are developed using Embedded C, compiled using RIDE tool. ISP is used to dump the code into microcontroller.