SYBSC IT SEM IV EMBEDDED SYSTEMS UNIT II Application and Domain Specific ES
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The document outlines key components of washing machines, particularly highlighting important parts like the water inlet control valve and motor. It discusses automotive embedded systems, emphasizing their role in modern vehicles, where numerous electronic control units (ECUs) manage various functions from fuel injection to power windows. Additionally, it describes the communication protocols used in these systems, such as CAN, LIN, and MOST, which facilitate efficient data transfer within automotive applications.
SYBSC IT SEM IV EMBEDDED SYSTEMS UNIT II Application and Domain Specific ES
- 1. APPLICATION AND DOMAIN SPECIFIC CASE STUDIES UNIT II
- 2. WASHING MACHINE Important parts of the washing machine: Water inlet control valve Water pump Tub Agitator or rotating disc Motor of the washing machine Timer Printed circuit board (PCB) Drain Pipe
- 4. AUTOMATIVE EMBEDDED SYSTEM The Automotive industry is one of the major application domains of embedded systems. Automotive embedded systems are the one where electronics take control over the mechanical system. Ex. Simple viper control. The number of embedded controllers in a normal vehicle varies somewhere between 20 to 40 and can easily be between 75 to 100 for more sophisticated vehicles. One of the first and very popular use of embedded system in automotive industry was microprocessor based fuel injection. AES are normally built around microcontrollers or DSPs or a hybrid of the two and are generally known as Electronic Control Units (ECUs).
- 5. AUTOMATIVE EMBEDDED SYSTEM Some of the other uses of embedded controllers in a vehicle are listed below: Air Conditioner Engine Control Fan Control Headlamp Control Automatic break system control Wiper control Air bag control Power Windows
- 7. Types Of Electronic Control Units(ECU)
- 8. Automotive Communication Buses Embedded system used inside an automobile communicate with each other using serial buses. This reduces the wiring required. Following are the different types of serial Interfaces used in automotive embedded applications: a. Controller Area Network (CAN):- CAN bus was originally proposed by Robert Bosch. It supports medium speed and high speed data transfer CAN is an event driven protocol interface with support for error handling in data transmission. b. Local Interconnect Network (LIN):- LIN bus is single master multiple slave communication interface with support for data rates up to 20 Kbps and is used for sensor/actuator interfacing LIN bus follows the master communication triggering to eliminate the bus arbitration problem LIN bus applications are mirror controls , fan controls , seat positioning controls
- 9. Automotive Communication Buses c. Media-Oriented System Transport(MOST):- MOST is targeted for automotive audio/video equipment interfacing A MOST bus is a multimedia fiber optics point–to-point network implemented in a star , ring or daisy chained topology over optical fiber cables. MOST bus specifications define the physical as well as application layer , network layer and media access control.