Senosrs And Signal Processinf

Question 1

What is a strain gauge

Answer 1

A strain gauge who’s resistance changes when it’s length changes . The resistance increases or decreases as the tension or the compression is applied

Question 2

If there’s tension on the strain pattern, what happens to resistance
If there’s compression on the strain pattern, what happens

Answer 2

Tension: area narrows so resistance increases
Compression: area thickens, resistance decreases

Question 3

What is thevenin’s equivalent circuit theorem

Answer 3

Equivalent circuit composed of one voltage source and one resistor can represent two points in a circuit.

Question 4

What do optical encoders measure

Answer 4

Optical encoders measure the angular position of the rotating axis. There are two types:
- incremental rotary encoders: the measure,went does not provide an angle directly but provides only the angle increment
- absolute rotary encoder: the measurement provides the angle directly

Question 5

What does AD converter do

Answer 5

Transforms analogue voltage into digital binary signals, and the digital signal transfers into a microcontroller

Question 6

What does a micro controller include

Answer 6

Includes several types of memory: flash, EEP-ROM, and SRAM where user made program will be stored in non-volatile flash memory.