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本帖最后由 hi_yjs 于 2013-1-25 21:14 编辑
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' _% W+ i( T7 @, x最近用热敏电阻做个温度计。 M7 R7 V* q/ F! W% \3 R
大家都知道,热敏电阻阻值随温度是非线性变化的,而且规格书也只是跳跃地给出部分对应值。6 [& a4 N1 U5 W/ l# o6 \3 [9 y
请问该如何写出较高精度的程序呢?
: ?2 Q a6 ~: U% y0 ^8 H. k(查表吗?那样表格会很庞大吧?而且取值也不好计算吧?)
) o5 ]9 r! a6 d- E. h$ e
4 C" L# x7 `/ Z2 D付热敏电阻部分对应阻值表:0 U. f+ ]( U! I" q0 _# f. `
LT804;BValue25/50=4020;R25=100K' z1 C; R% I. k
温度 电阻值5 p3 ~8 ?" D+ ?9 [! I
-50 7291.38
6 [) A I3 @) D( Q) x-49 6774.88
& |0 ~7 E9 Q- S, L-48 6298.61
/ A2 s5 A4 A/ D5 s-47 5859.17
$ L8 H% k3 D ?-46 5453.45; x3 d/ l8 @1 I% d* s
-45 5078.66& Q0 R2 Z4 [5 i2 G7 u
-44 4732.22
/ T; V" q# b; @-43 4411.8$ D$ U/ p! D Z6 I( m8 B
-42 4115.28
7 g) n6 u L) W-41 3840.72
5 K4 E$ h; [+ a4 J7 y" K6 r6 O* x-40 3586.35
6 K- E( @9 p" o. o-39 3350.55$ `+ J5 l k4 i/ _) b `
-38 3131.85
) \% I( }/ o( Y* a6 k3 g3 Q-37 2928.9' I$ M! R5 r0 w+ a" S0 F# I
-36 2740.466 B5 a7 H( N9 g o
-35 2565.44 I1 Y( M& V7 ]9 D, U/ x2 F
-34 2402.69$ q) t1 w" p+ N6 b6 t
-33 2251.376 r' Z; p& ?1 ?) t: J+ ?- t
-32 2110.580 P- M3 E: |2 ?# A" A. p
-31 1979.52- R% w% `8 ~/ x, `+ j2 P3 v7 b
-30 1857.46
8 a- \! w) q3 D+ o$ q" b-29 1743.72
, A3 L: w& n- Z' c/ r4 l-28 1637.68
+ I1 S! ?4 k9 w5 h5 t6 Z- M+ u-27 1538.77 T7 f; z a1 p; F$ b+ e" e
-26 1446.472 ^1 ?6 A" u9 H; P/ e$ f
-25 1360.3
" X) K* T/ Z4 l% ?3 v6 m-24 1279.82/ @' ^( v( D! N
-23 1204.61
! V& k ?1 P* H; A; G-22 1134.29
: H3 T+ {6 z4 c; W1 H9 d* E8 x-21 1068.52
8 F( c. p9 L7 C, z-20 1006.989 `6 p. ]* |/ h. {( O7 \' v
-19 949.368
4 e! h5 }4 v! Q3 v-18 895.4112 `" b& k: p/ w5 y% U
-17 844.856( t9 Q6 d2 \1 {6 d* d" C: M/ L
-16 797.4678 n m. e2 w# [, F( s H
-15 753.028
! ~8 ~: j; v) k' l5 |-14 711.338
/ Z8 M( z% o4 T( E6 e4 j0 Z-13 672.211* p3 ]+ o* @; `; [9 p8 c9 [
-12 635.474. n$ B# ~! K% ^+ Y, _
-11 600.967( F( c5 `; n4 {
-10 568.5434 ]; n" { [+ w3 m
-9 538.063! B% Z1 C9 f0 G, I: B1 N
-8 509.4
8 Q% T- r R! M( f& N# M-7 482.435
5 `7 e) H ~* x6 n. b0 @7 q-6 457.057+ c0 L8 s2 x+ t8 T2 N; O
-5 433.1652 m. n, p$ h8 P$ o. s
-4 410.663
* r5 l! z9 T6 D6 ~( M! v3 X. H-3 389.462
4 D3 Y! Q7 |2 F7 |$ y/ |: ^-2 369.4795 i) \6 W0 W0 u S+ K( N
-1 350.6398 \, q5 S, P; O7 X$ t7 B, u9 |
0 332.868: Y) l, V0 K& S s( g0 z9 S: _
1 316.102+ y4 b0 f5 H/ d9 `6 {
2 300.276
( ?% H2 p0 B$ S7 d! ~3 285.3345 Z# g& X% d. r4 C, F' x0 X
4 271.221
, ~' A6 z7 S9 T& k5 257.886
, N% C5 L5 b4 z9 y7 T/ r, ?6 245.2838 Q5 j1 y7 t$ y# w
7 233.3670 M- [4 e% [; q& N9 u
8 222.098
5 U, U* Y- S( X* Y9 211.435( J, U- T, ?2 S7 i. [- a
10 201.345) E4 ~8 z; q) G; G) w# Q4 ^6 p
11 191.792
$ R- O7 M8 q/ H4 v% X0 b+ {5 o j12 182.746
0 B9 u& c( j( E' G4 \' d- p/ L13 174.176
) m T6 C8 X4 j$ W: i1 n0 |$ S14 166.0564 @# {3 E" p5 d+ |6 Z8 U: G
15 158.359 f8 b) D: F" E2 q( c# J6 D6 K8 q
16 151.06
- b; w" t" s, |# Z17 144.138
- E# X6 ^7 V2 ]; n9 j; i( S18 137.5717 Y/ x! f2 P/ Z' A% W
19 131.339
3 d% a$ r7 o3 D- n1 e20 125.423" \8 K n2 \1 l8 f) V
21 119.805
1 m4 ^- r% |! E( A+ T B22 114.469: ^4 W) r6 Y; I4 X. ^
23 109.399! n' w3 j% I! P* L W
24 104.5816 ?' W# U; p6 ~3 y
25 100
5 ]6 a! { B0 Y+ o Z7 F! [26 95.6443
4 i7 R6 I1 r- }27 91.5013
7 L: B/ f/ B7 ~4 G7 G28 87.5596
$ c' p* \+ Y, S9 U& \ D; p+ |29 83.8083
. G0 T6 F. m, s# }30 80.2372
) A ~4 Q! q$ }2 X# r j4 z5 b- n31 76.837" h0 W0 I7 K Q
32 73.5984
, X: i ^) T9 L" X) F6 D7 q33 70.5131
" i4 |3 F2 { z# G34 67.573
8 |# b# a4 R& i+ t7 [$ O; P: x35 64.7706$ v2 z" S& n* W! r& Z
36 62.09875 ]9 k; L* B; N- C& U) g
37 59.5507
( }* Q; Q* l9 X+ z# ?; c38 57.1202( h6 {0 j% m4 _& S/ i0 E
39 54.8011
1 s; {" ?/ T/ ]& {+ t$ T+ Y40 52.588% E" `6 I( o5 x2 ^; z+ S$ m
41 50.4753
* V/ j; v0 ?7 G42 48.45814 @% f$ h" c w& B7 F+ D
43 46.5316
9 {( v1 H) `* M/ |44 44.6913
% H# C$ A ?# e45 42.9337 y. l9 G1 x8 n5 e6 M, e
46 41.25259 l2 V) G- Y: D2 J, j
47 47.3965
) Y4 C# h" p* {+ y( E48 38.111 R! U0 V8 s% Z1 t* b9 y! c" A
49 36.6411! \8 z( O. S/ F1 |, }
50 35.2360 q' _+ a8 c) S
51 33.8916
5 Y3 o8 H9 |4 V; O6 |) U9 w5 m. B, \52 32.6055 k8 d, x5 e. W+ ?2 N/ e
53 31.37343 a+ p$ T7 H$ N. ^
54 30.1944) M$ _: ]/ G- D6 Z0 I; T7 ^
55 29.0653
: p i- y) |& ^# l% R9 Q56 27.98390 H" z& M3 d* n0 q: V0 d' ^( K
57 26.9478% T+ ^2 k, F3 u2 J0 D
58 25.9551: v* T K4 i; a* |. ~
59 25.0036+ [/ d) @ H" \- I- K" Z- d i
60 24.0915
7 C+ _( F8 v# k0 y9 {8 R8 ?) m1 S+ p61 23.2171 z4 ?7 ` N) b+ x
62 22.37847 X; D1 a2 G+ W; S+ i0 H1 q
63 21.574
$ }( e9 X5 J+ L64 20.8022
: X# Z8 D* l, C9 T4 T7 g% |65 20.0617
5 ? n0 N4 i I/ G( I66 19.3516 j: `# r$ ~4 @
67 18.6687' j& }& h) G i( }- g/ _" z& u
68 18.0137 z. v3 T/ |& Y0 k
69 17.38477 k" Y; q9 ?% ^# N) H0 R
70 16.7805' k2 B; n7 Z2 N& v% Q: O: G9 T
71 16.2001
! x$ O+ W0 H5 g; M4 Z72 15.64248 p, T6 s, M/ H4 u
73 15.10648 h1 f5 A1 x" E, {+ Z
74 14.59136 ?$ G# I! }8 x8 h3 o6 e
75 14.0969 c5 v5 B8 h3 p" P, q. c8 y2 R( }" u
76 13.6198/ P8 _1 F4 W: Q2 Z; ]! y8 m
77 13.1618
! @2 J/ E/ D a- O# y( Q78 12.7213
2 m( |, f9 d5 Z79 12.29753 m }' s$ K6 D% r7 Q6 A
80 11.8897
) V- r# f y% G( V, _- J81 11.4972
3 C5 I: L; F& K" z, R+ |: _# `$ m82 11.1195
) }) Q1 J5 h9 |: W! }83 10.7558/ y% |9 b A" N3 Q+ a4 B% Q
84 10.4056& I3 w5 A |4 l/ S7 P* Q2 M _
85 10.06844 V8 `( A" e* A) V- s* P
86 9.7435# X4 a( @1 g* b1 y
87 9.4306
8 O5 b# n% W/ j( Y; t% y# E F88 9.12916 }. G& _( L' a* Y$ I
89 8.8385( u( H' Y" H, p8 N6 a( @/ S- G
90 8.55856 N2 |" B* h6 g
91 8.2885
: R6 T! A9 t; \' z, D92 8.0283
; t9 g' p8 A0 @6 ]* P& G" K93 7.7773& C4 W- E: C* N9 E5 P: x
94 7.53520 c) Y% C1 S% }) x9 s
95 7.3017
7 M- @" ^7 P' \" B T* v1 b) v) |1 j96 7.0764
8 z9 J8 V) ?1 P! Q' A; M- s0 I97 6.8591
2 u+ Z$ \4 j7 F* u5 N4 H0 d* l98 6.6493% P9 a1 H2 W- H4 N+ c, G! v$ w; L( M
99 6.44697 C9 l. k8 q5 r* y; S
100 6.25150 w& c1 }/ }4 @9 E6 e
101 6.06287 |7 Z; Q, ^, y( `$ j) O, u6 S
102 5.8806
$ b. ^( }8 z: P) B4 Q$ p103 5.7046
. B1 q+ m% l9 v104 5.53474 B, w' _6 r8 z* x1 m
105 5.3705
5 T# H) T/ v# F106 5.2119& I1 s5 V' a( B' D. N* v- u0 C
107 5.0586- E1 @- I( H* U8 s; m# y' M) S
108 4.9104" S/ a$ O f- W5 {* F; h+ ?
109 4.7672
. K- O1 d) l1 m2 l: g. F* N110 4.62883 y+ U- N+ M F* G5 I+ L9 S/ R
111 4.4959 W5 \" z4 }; i& T3 _, u, o
112 4.3655
' b. R! ^- y; Q: A& V5 O113 4.2404
. ]$ y4 x8 w' e7 b y1 A* k* W114 4.1193" y* A. u% W6 q, P- x! W
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