Purpose Of Embedded Systems
Purpose Of Embedded Systems
Data Connection, storage and representation
- Purpose of embedded system design is data collection. It performs acquisition of data from the external world.
- Data collection is usually done for storage, analysis, manipulation and transmission.
- Data can be analog and digital.
- Analog is directly connected from the analog signal. There is no need to convert data.
- The embedded systems which have data capturing techniques collects data directly in the form of analog signals whereas embedded systems with digital data collection mechanism convert the analog signal to the digital signal using analog to digital converters.
- Digital camera is an example of embedded systems
Data Communication
- Embedded data communication systems are in home networking systems to complex.
- Data transmission is in the form of wire medium or wireless medium. Data can either be transmitted by analog means or by digital means.
- Bluetooth, ZigBee and Wifi is an example of wireless communication and USB, TCP/IP is an example of wired communication.
- Network hubs, routers, switches are example of dedicated data transmission embedded systems.
Data Processing
- Embedded systems with signals processing functionalities are employed in application demanding signals processing like speech coding, audio video codec, transmission application etc..
- A digital hearing aid is a typical example of data processing
- Digital hearing aid improves the hearing capacity of hearing impairment person.
Monitoring
- Medical domain embedded products come under monitoring function. Patient heartbeat is monitored by electro cardiogram machine but it cannot impose control over the heartbeat.
- Digital CRO, digital multi-meters and logic analyzers are the example of monitoring embedded devices.
Control
- In embedded system, sensor and actuators are used for controlling the system. Sensor are connected to input port. Actuators are connected to output port.
- Sensor captures the changes in the environment variable. Middle system process information. Actuators are changed according to the input variable. It display the output.
- Example of control is air conditioners systems. It control the room temperature to a specific limit.
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