Computer Control

Computer Control

1. what is computer control?

   • computer controlmeans that a computer is part of the control system. The computer is normally used to run the control program.
   • we use the term 'computer' very loosely. it does not necessarily mean the kind that you are working on right now. It often means a processor or microchip embedded with the equitment.

2. Sensors

   • A sensor is a device designed to measure some physical quantity in its evironment.
   • Once they have taken a reading or measurement, they might send the reading straighyt back to the computer or they may store it up and take a set of readings over time and send them back in a batch.
   • This data is called an input. Whilst the sensor itself it producing a output
   • There are many different types of sensors, some examples include; heat sensors which measure temperature in living rooms for the central heating system or humidity sensors to measure water vapour in the air at places like swimming pools or greenhouses.

3. ADC

   • Most sensors take analogue measurements. This means the output changes smoothly from one value to another.
   • All computers need digital data in order to process it further, Digital data only has two values either 0 and 1 or on and off.
   • In order for the data collected by the sensor to be handelled by the computer, it needs to be converted from an analogue signal to a digital signal. To do this, a special piece of hardware is needed called an analogue to digital converter(ADC)

4. Advantages

   • Can operate 24 hours without taking a break. Also they can work without holidays or sick days.
   • will accurately repeat actions over again and can process the data