EMBEDDED SYSTEM - LECTURE 1 PART 2

______________ an important safety device that provides extra protection against head-on crash – for the front seat occupants. This system works on the commands from the microcontroller. The controller of this system gets the power from the battery. If the sensors detect accident, this microcontroller operates the _____________ by operating alternator.

This navigational system consists of an embedded circuitry built with a GPS receiver, a gyroscope, a DVD-ROM, main controller and a display system. The GPS receiver receives the current longitude and latitude values that are compared with the stored map. The Gyroscope and other sensors provide the road direction and speed. From all the information gathered at the main controller, the display system displays a navigation or route map of the destination in the display screen.

In this, an optical sensor is placed on small area of the front windshield glass (opposite to rear view mirror). This optical sensor is placed at an angle to emit the infrared light which then reads amount of light by it when the light is reflected back. This light is reflected in cases where the windshield is wet or dirty. Thus the optical sensor determines necessary speed and frequency of windshield wiper depends on reflected light into the sensor.

This system mainly uses different methods to detect objects around the car. Sensors installed on the front of the vehicle and rear bumpers acts as both a transmitter and a receiver. These sensors send a signal that will be replicated back when it meets an obstacle near the vehicle, and then the carputer will receives the time signal and bumper will use the radar to decide the position of the obstacle. The car will sense the parking space and distance from the side of the road then drive the car into the parking place.

This type of embedded system are connected to a network to provide output to other systems.

This type of embedded system often used in medical, industrial and military sectors because they are responsible for time-critical tasks.

This types of embedded systems are designed using 16 or 32 bit microcontrollers. These systems offer both hardware and software complexities. C, C++, Java, and source code engineering tool, etc. are used to develop this kind of embedded system.

The heart of general purpose computer.

A component of a embedded system that is responsible for moving and controlling mechanism or system.

It measures and converts the physical quantity to an electrical signal, which can then be read by an embedded systems engineer or any electronic instrument. A _________ stores the measured quantity to the memory.