SENSORS - IoT - Changes with environment.pdf

A basic presentation on knowledge of SENSORs. What are various types of sensors. Sensor Changes with the environment and can be seen as following types in the document.

1. Sensor
Changes with environment and can be seen
•
M
echanical
•
P
neumatic
•
C
apacitive
•
R
esistive
•
I
nductive
•
O
ptical

2. Mechanical
•
B
imetal coil temperature
•
S
train gauge

3. Pneumatic
•
F
luid or air Tube air pressure temperature

4. Capacitive (charge)
•
C
= Area/Distance(dialectric
constant)
•
V
ariable capacitor (tuning knob)
•
S
liding sheath on column
•
F
loor tile
•F
i
s
h

5. Resistive
•
Charge capacitor to find resistance
•T
h
e
r
m
i
s
t
o
r
•
S
alt doped fabric Humidity
•
C
arbon , fsr
•
C
arbon microphone
•S
e
l
e
n
i
u
m

6. Inductive
•
Charge through a resistor to test
•
M
icrophone
•L
i
n
e
a
r

7. Optical
•
S
elenium (big)
•C
D
S
•
D
iode
•
P
hoto darlington
•
V
idicon
•C
C
D
•
M
emory based cameras

8. Semiconductor
•
L
ight,
•
A
ccelerometer