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本帖最后由 hi_yjs 于 2013-1-25 21:14 编辑
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$ a1 K+ L0 T6 S, v: p; S9 W最近用热敏电阻做个温度计。9 @: d8 R5 G# s2 ]+ S
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。
' i- u' Y- Q2 |请问该如何写出较高精度的程序呢?" ^) |3 _4 A5 l: |
(查表吗?那样表格会很庞大吧?而且取值也不好计算吧?)) J# i0 I3 f' G2 N
O* \; v$ O- N V# @
付热敏电阻部分对应阻值表:0 r# i8 X& Y0 z8 E: m* I" z& d
LT804;BValue25/50=4020;R25=100K
9 @6 F; x! v+ i6 C' w% F温度 电阻值
, }, R, I7 [* C( s-50 7291.383 y4 L# m3 m% \8 a0 G* Q! o
-49 6774.88 M! Q8 y, V% Y( E. P8 k) {
-48 6298.61$ r. j. G- s3 p0 `! `1 ~
-47 5859.17+ p" t: x/ C5 u6 u# \( V3 L
-46 5453.45
! _2 N+ [, X# o; [, k1 a-45 5078.66
7 c4 @; \' V! |! u/ S, E-44 4732.22 ]! C3 a) `* J1 F1 }: ^
-43 4411.8
* H& |1 A5 W0 T6 r' z/ v-42 4115.28! \1 `8 M- i( ~3 t; [+ P& A/ q H
-41 3840.72
# R0 }! u* U5 H. R8 ?1 L-40 3586.358 \: p+ C8 l* R/ P6 `8 R
-39 3350.55% _% V8 u4 j7 D/ y4 K
-38 3131.85
& X7 s1 x& H' u& r, O/ }& B-37 2928.9
) p. q1 x5 {* g" n) I# `-36 2740.46
3 @8 X4 R7 X' ?3 m! ^-35 2565.4
, `+ o' Q2 X. Y- q Z! R" a-34 2402.69
- E0 y5 l1 Q6 Z) G, ]* x-33 2251.37
9 w5 `9 J# S/ R& | s-32 2110.584 J7 L# n0 ~$ I. i0 ?* r
-31 1979.52( ?; @" ?$ i+ Z" t* L
-30 1857.46/ u# g9 [: v, K% |" j
-29 1743.721 B! ^6 [% ^$ ]4 i9 T8 A/ d0 F
-28 1637.68
1 B* J# f0 I9 c% V-27 1538.77
! x! k4 \, f: t2 u4 W-26 1446.47
6 `% X+ s7 {. X9 r4 d! C# b# u1 H$ G-25 1360.3, ?, ] m+ J( `4 F G# C
-24 1279.823 q/ @" _. @- E4 h2 v7 F: j
-23 1204.61
4 P9 F5 F$ ]. J) [-22 1134.29. O2 |8 o6 ^6 U }9 x/ `
-21 1068.52! m. T7 q' L ?4 k0 [- t0 w v
-20 1006.986 L4 d; ?4 s$ l' S
-19 949.368
4 ]1 G/ y7 m: F; z" Y& O& S-18 895.4119 E. Y# R% v+ |$ d4 h2 y5 s
-17 844.856
! l& j( ~7 f2 |& q9 d% P-16 797.467
, i7 i+ p; T! Q- w6 |- h-15 753.028( l. Z3 a7 y- g/ Y b
-14 711.338
- Q& b9 i- K f. q. t; \-13 672.2117 r" k* o! I {. T" E1 ^; ^1 m
-12 635.474, e- m9 @& H1 _
-11 600.9676 v1 V. U; H! `
-10 568.543
, U' B5 |! D9 \; B2 ]& ]) s& u8 r-9 538.0633 Q8 g0 {/ y. ?( ~9 [
-8 509.4
+ {/ d0 w3 x& D) X# b-7 482.435
2 ?1 ~8 ] D7 q" L1 C3 U/ J-6 457.057
w1 h g' A1 T4 D-5 433.165' D& L% f: \: E B% ~, N
-4 410.663% U% M( f; @1 S6 [1 C8 }4 A* G
-3 389.462 P/ ?& N2 O4 S' M2 z
-2 369.479
; U5 o$ t! X3 f6 s5 q) u& _. Z: H$ z-1 350.639) K* r/ J: J+ q$ y& f2 }5 y
0 332.8689 `7 ]! u- w* q" B3 D! |
1 316.1020 z8 S a$ c0 F$ m
2 300.276
! ^4 m0 n4 v% K3 @" ], C5 C3 285.334# n2 o% T6 k; P* x& v
4 271.221
. b+ ^9 @ `- l; j3 |* C+ s6 y5 257.886
5 r6 Y7 i/ E7 b6 B$ D6 245.283
) M. a- A7 I6 w/ L% B% l7 233.367
3 D" N$ I" B3 y) W8 222.098% V; [! S k0 u* ?* [6 Y
9 211.4355 ~: a X; @- F0 D
10 201.345- A+ ?& ~$ X+ G7 E
11 191.792
7 v0 q" l6 B1 s m4 o7 u12 182.746$ @2 o9 ~) |4 S: f" z" u1 g+ v8 }
13 174.176; z8 H, l* p& q0 Q. P7 C( L
14 166.056- B1 T! s, e- n" H r2 N# J9 D
15 158.359
9 [, a$ Y' T; w4 H% Y/ [16 151.06; Z. a" y% P; A L3 a) W3 @4 M
17 144.138
1 W4 E [8 }! b5 b2 ]6 h6 M18 137.571
' D2 k I3 t! j* S19 131.339/ V6 p: D+ _* T: N2 D* m
20 125.4239 K% `; h; y$ ~! B& m
21 119.805+ \# h2 ]) ~6 ^3 B* {0 \$ b4 q
22 114.4699 t8 s3 P F* M! y
23 109.399
3 ?+ n! ~- l q# D. t! q5 f24 104.581" g U$ ^: L$ o+ u! w# |
25 100
h1 l+ W# e3 l$ R; i26 95.64437 {! o: d- [. S5 L1 J
27 91.5013, U8 n2 E. ? G" n$ Z( ]! I
28 87.5596
! M4 H5 ^3 u, A0 I: f$ N- v* C29 83.80833 o. C, l: q% ^7 Z/ s9 W' n
30 80.2372 ^6 {+ f4 B* p* n' I7 i" L f$ l
31 76.837
& W; H2 |/ P" a& O/ ^6 n& u ]: {32 73.5984
/ R8 N9 a0 j! ?5 I2 Z* i4 t5 y, L: J/ o33 70.5131% \; B9 ?1 ]9 \% d
34 67.573
. t: a) B. c" R5 U# \! p6 t' i35 64.7706
7 O. ~7 V( p9 ^/ y36 62.0987; Q0 e9 i# ^0 [ T
37 59.55077 H4 p* U* H8 T
38 57.1202
+ ?3 D9 J2 L: [( ?+ R0 x9 }39 54.8011
' P. i" {* ~2 V& F; y' {40 52.588/ W o* i) {( O0 N7 g8 E+ E' a
41 50.4753
" }/ q j) a) s+ ^42 48.4581
& J5 t- C7 }0 l43 46.5316
' }7 X! \! C% t6 _3 h2 n+ w/ _44 44.6913
& x! M# N/ T; @45 42.933
( C, G# ~' T- |8 x46 41.2525
, g8 F; h" _0 T6 u47 47.3965
- w h8 V6 F; m0 o48 38.11
& _3 @8 ~0 Y, i! S- W9 s49 36.6411
% r8 C3 E3 V; h) O50 35.236$ @& n6 a9 D3 A' m6 ]/ i3 V
51 33.8916
) |. c7 C4 N2 m' j- S) q) d' P52 32.6054 O$ |) p- _* |+ @2 A# R
53 31.3734, f) ~- y d) |/ J' I* l& S' N2 U
54 30.1944" O( n4 A* k* R4 Y
55 29.0653
( g" b) \ ]6 a6 I56 27.9839
$ w5 n' r& Y9 A- C6 u$ S- t1 X57 26.9478
o1 \! v% p& n% }: ]$ r1 H58 25.9551
! t t* T. d8 C59 25.0036
8 u+ V8 }; N+ _% [60 24.0915* D* ?' x8 F1 P
61 23.217' j2 p" ]6 j2 s9 d( _
62 22.3784
% `6 i; l/ H% B' l1 q63 21.574& I6 s- c% r- A
64 20.8022% v( k( q8 Q h g5 M' h* Y
65 20.0617' V V$ [# W( z7 ^ Q- v
66 19.351" y1 S/ ^/ t0 C3 q
67 18.6687
& R% ~8 v$ V8 t" b+ p) n; e2 D: N0 r68 18.0137
- |6 k! t5 q4 c69 17.3847# H7 s5 B9 c. J* K* S0 w0 S/ |
70 16.7805
0 ^* P. B# X3 R& @71 16.2001
x/ r. G5 h! ^9 ]% W72 15.6424
: F6 i7 u- s6 r( T( f' N73 15.1064: Y, u: A6 x+ H4 h, F' o4 H/ S
74 14.59131 Z7 d+ V/ f. t# V
75 14.096
* V* F: x, J& m# a76 13.6198* ^0 u* C# @9 X% s5 i! ?
77 13.1618 z k' h; O( T- G( s
78 12.72139 [, g% j6 |, I _2 i3 F$ v+ @, j* f
79 12.2975
8 M* Y! Y8 u1 X, E" ?80 11.8897
" b$ Y& u( G8 F) m7 |0 z81 11.4972
! I" B( c2 ^, S5 F- ~82 11.11956 h' _2 K, M+ C
83 10.7558* f" U2 g% P* [: `
84 10.4056
% f% R( o/ B6 o85 10.0684
6 e! S$ ^/ P/ S/ \0 U86 9.7435
5 A0 Q O, j7 y- f9 M5 F% d87 9.4306
9 D$ t* T8 _: n88 9.1291/ |$ R4 t/ M: _; I, g) p% X; G% P
89 8.8385& s9 q! `3 b& K* H. |# Y
90 8.5585
9 C7 a) Y+ g# K# ^91 8.28853 e% p) G" L/ S8 o% @) V% f
92 8.0283
1 D. ?: W& e) k7 m93 7.7773
2 }! g r" L' ?8 h3 ~- r7 s94 7.53527 b- t, z0 r( @
95 7.3017
: {! N1 n! {+ p# u& \: A, l96 7.0764
. [( b5 O7 K+ g# E5 U/ l8 ?5 ?; i4 N97 6.85910 x6 C' P- u' p; H" u; f
98 6.64931 u0 f' B* |4 M1 R; Q1 R
99 6.4469
# P: b7 x0 |+ N3 x3 B100 6.2515) p# z- m C' a; R9 e6 U9 H5 F2 S1 T( \
101 6.0628/ J3 E9 y. N; |
102 5.88066 }6 Z* B' [+ X. z" |) S# V
103 5.7046
8 I8 k8 `+ o/ F: G9 P, l6 _104 5.5347
* w* |0 ^ t7 F& P105 5.3705% S7 r3 R8 d; x- z
106 5.2119
$ _$ \$ y' ]5 x! H6 X2 y107 5.0586
. @% b0 g9 x8 D$ d j! ?/ U' ?; _% s108 4.91040 J1 p( B% p$ M5 |0 C( r
109 4.7672
' |6 m; g- v# }- [# Z110 4.6288* F6 Q) X& \, Y3 ]% n
111 4.495
5 G! h7 V, o& [, P4 k) d: p112 4.3655
5 s+ i7 e4 p) ~7 O9 b- H113 4.2404
" @/ G* N+ P$ L% q6 t$ D114 4.11931 b' R B# H, B9 P) B9 r
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