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Key Words -

Sensor - can detect the temperature or composition of something that's being manufactured

Analogue - Something that bears an analogy to something else.

Digital - Expressed in discrete numerical form, especially for use by a computer or other electronic device

Analogue-to -digital converter - device for converting analogue signals into digital signals

Actuator - One that activates, especially a device responsible for actuating a mechanical device, such as one connected to a computer by a sensor link.

Feedback loop - The section of a control system that allows for feedback and self-correction and that adjusts its operation according to differences between the actual output and the desired output.

Robot - are computer-controlled machines that carry out physical tasks for us.

Quick test -

Now, for knowing if you understand this information properly you should do:


1_ What is a control program ?

2_ What sort of data does a sensor normally detect ?

3_ What is a feedback loop ?

4_ What is an actuator ?

Control Programming -

For a computer to control a situation, it must be given instructions. There are plenty of ways of doing this. One way is to use simple instructions to guide a robot around the floor.

Robots -

Robots are computer-controlled machines that carry out physical tasks for us.


Most robots are special purpose, like those which paint or weld cars on a production line.


Robots are often given their instructions by an embedded system rather than a general purpose computer.

Feedback -

Many manufacturing processes are under computer control.   

    

 eg. SENSORS can detect the temperature or composition of something that is being manufactured.They collect analogue data, but a computer needs digital data.

For use a computer the sognals have to pass through an analogue-to-digotal conventer.

The data is the fed into a computer system.  The software checks the values against what they should be. Signals are then sent to actuators such as motors, heaters or relays to keep the values within limits.

This constant feeding back of sensor data and carrying out actions is called a feedback loop.   A good example of this is in the control of the temperature in a greenhouse.

Controlling Devices -

Many important applications produce electronic signals as output, we use it to control all sort of devices like:

Autopilot

The cruise control on a car

A washing machine

Manufacturing on a production line

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