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Kapacitní senzor s proměnnou vzduchovou mezerou<br />
C =<br />
εS<br />
,<br />
d<br />
⎛ 1<br />
∆C<br />
= εS⎜<br />
−<br />
⎝ d + ∆d<br />
1 ⎞<br />
⎟<br />
d ⎠<br />
⎛ 1<br />
= Cd⎜<br />
−<br />
⎝ d + ∆d<br />
1 ⎞<br />
⎟<br />
d ⎠<br />
= C<br />
∆d<br />
−<br />
d<br />
∆d<br />
1+<br />
d<br />
∆C<br />
=<br />
C<br />
x =<br />
∆d<br />
−<br />
d<br />
∆d<br />
1+<br />
d<br />
∆d<br />
d<br />
y =<br />
f ( x)<br />
=<br />
⎡δf<br />
⎤<br />
f ( x0<br />
) + x⎢<br />
⎣δx⎥<br />
⎦<br />
Taylorova řada<br />
x<br />
f ( x)<br />
= − 1 + x<br />
x<br />
δf<br />
f (0) = 0, =<br />
δx<br />
0<br />
+<br />
1<br />
2!<br />
1<br />
2<br />
x<br />
⎡<br />
⎢<br />
⎣<br />
δ<br />
,<br />
δ<br />
δ<br />
2<br />
2<br />
f ⎤<br />
⎥<br />
⎦<br />
2<br />
x<br />
f<br />
= −<br />
x<br />
0<br />
+<br />
1<br />
3!<br />
3<br />
x<br />
δ<br />
,<br />
⎡δ<br />
⎢<br />
⎣ δ<br />
3<br />
f ⎤<br />
⎥ ⎦<br />
3<br />
x<br />
2 2<br />
3<br />
( 1+<br />
x) δx<br />
( 1+<br />
x) δx<br />
3<br />
( 1+<br />
x) 4<br />
2<br />
3<br />
f<br />
=<br />
x<br />
0<br />
3⋅2<br />
....<br />
∆C<br />
= −<br />
C<br />
∆d<br />
+<br />
d<br />
2<br />
⎛ ∆d<br />
⎞<br />
⎜ ⎟<br />
⎝ d ⎠<br />
3<br />
⎛ ∆d<br />
⎞<br />
− ⎜ ⎟<br />
⎝ d ⎠<br />
+ ....