Sensor = Primary Sensor + Real Sensor The typical structure of a device is: Sensor ⇒ Front-End Electronics ⇒ A/D Converter
- ==A primary sensor transform a non-electrical quantity into another (more “convinent”) non-electrical quantity==.
- ==A sensor (or in this case called “real sensor”) instead, transforms a non-electrical quantity into an electrical quantity==.
- Convenient quantitites for this output port of the primary sensor are displacement, strain and stress.
- This is because we know that each of these quantities here can be easily sensed by means of resistive, capacitive or piezoelectric sensors.
- Another convenient quantity is temperature because in this case we can use thermoelectric effect, we can exploit capacitive or better resistive sensors.
- It can be also a velocity, or speed, because in this case we can exploit electromagnetic effects to have a sensor.