Control system

Control system

1. Sensors

   • Data from sensors is first processed by a computer
   • The computer then decides whether or not to send a control signal to other devices such as motors or lights

2. Feedback systems

   • This is where the output of the control system changes the input

3. Non-feedback

   • This is where the output of the control system does not affect the output
   • A burglar alarm system with a pressure pad, PIR (passive infra-red) light beam and body heat sensor, for example, will activate a siren if somebody touches the pad. The siren output doesn't affect the input.

4. Examples of control systems

   • Toys- Some have PIR sensors to make a sound or movement when someone moves near.
   • Gaming- The Play station Eye can detect the Play station Move using light sensors
   • Smart meters- Sensors can measure and record how much electricity is being used

5. Control Signal

   • Data from sensors is first processed by as computer. The computer then decides whether or not to send a control signal to other devices such as monitors or lights

6. Bit pattern tables

   • They are used to show how computer nits switch equipment on or off. 1 means on and 0 means off