Question

Some clothes dryers have a “more dry” setting on which the dryer will run until the clothes are fully dry (i.e. for a variable, not a fixed, amount of time). Explain the role of the sensor, comparator and actuator in such a system. (Be sure to explain which is which!)

Answer 1

SENSOR:

sensor is a electronic device which senses or measures any physical quantity.

In case a dryer the physical quantity is wetness of the clothes. It senses tha amount of humidity present in the wet cloths constantly and senta those signals to the COMPARATOR.

COMPARATOR:

comparator is an electronic device which compares two electrnic signals.

In case of a cloth dryer. the comparator receives signals for the sensor and compares the signals with the inbuilt standard signals of dryness .after comparison it sends the signals to actuator whether to stop the machine or to modify the machine.

If the dryness levels match ,then the comparator sends the signal to actuator to stop the machine

ACTUATOR:

actuator controls the movement ofa mechanism in a machine.

In this case if the signal recieved from the comparator is taken and it stops the mechanism of drying.