|
EDA365欢迎您登录!
您需要 登录 才可以下载或查看,没有帐号?注册
x
本帖最后由 hi_yjs 于 2013-1-25 21:14 编辑 ! v3 \: P% [ s8 \( A6 G
( A$ P, K1 W& t1 A) `3 ?0 O
最近用热敏电阻做个温度计。
8 [) r1 K, C8 [1 k大家都知道,热敏电阻阻值随温度是非线性变化的,而且规格书也只是跳跃地给出部分对应值。
$ s) y+ }" o& e" l- j请问该如何写出较高精度的程序呢?
% D& P2 V/ k7 f" J: k4 h(查表吗?那样表格会很庞大吧?而且取值也不好计算吧?)9 O, K! t$ S" m" S0 i
) {8 K1 Z# E% p" N
付热敏电阻部分对应阻值表:: R3 ` d" w% k! v
LT804;BValue25/50=4020;R25=100K
0 S8 q: [% ^( O# |6 e: a温度 电阻值( I4 a- {, _1 p% a2 H
-50 7291.38
4 L! B( z% O7 q+ k/ ~-49 6774.888 K' S6 x. }9 s
-48 6298.61
( M% N0 S4 z8 @1 n4 p4 j2 Q( W/ e-47 5859.17( I8 M$ g! C* F- k! z; Q5 W$ e' y
-46 5453.45* t& s- ]3 g, D$ s& Q/ m
-45 5078.66
0 j, e- } C# x T s-44 4732.22
% }7 n- b' T$ K' B" _2 [-43 4411.82 K5 @: w( h, V- c& L* d
-42 4115.28: u# p- L* _- X& b
-41 3840.721 d1 c) E {; r5 L6 s
-40 3586.35
( Y6 O5 ^6 X! \) N' n7 }-39 3350.55
+ \% F6 [2 X1 u# f! C-38 3131.85$ ?% X5 d V) k, {, L
-37 2928.9/ Q- t5 u) p }5 U2 u7 o. d% H* _
-36 2740.46* T9 t. A _1 L2 n' {
-35 2565.45 Y$ _1 O$ V3 `! c, u" k) f5 X% i0 G
-34 2402.69
* R4 k4 i l/ _5 s) u-33 2251.370 `7 _" j3 i( |
-32 2110.58
* X# b# F' Y4 e" b. ?/ N-31 1979.52" p1 _# G/ ]5 x8 S
-30 1857.46: J, A! v ^7 s- L
-29 1743.72, N8 g2 o' w$ V3 x
-28 1637.68
1 H+ B1 I; Y6 A6 G9 [7 v3 e-27 1538.77
% h) t o2 u+ E) r6 B: l-26 1446.478 R( U" a+ M5 Z! }0 @* T
-25 1360.3
7 M3 A# @$ G7 t% W5 ]* R3 g7 e4 E-24 1279.82
& |6 S9 ?7 j; e; N-23 1204.61
, r" _1 @6 h' d8 m7 d* _: i+ \-22 1134.29
. x ~# K5 y# }2 H/ d-21 1068.522 p' T. G8 y/ G* S& M4 r- d
-20 1006.98
% \8 s0 b- s# s0 O2 Z2 X+ V, z0 e-19 949.368
; ]7 e. y7 V6 c; ?) t( Z; w% g# ~-18 895.4112 w* ]& y- q, `% u
-17 844.856
' d- p' o; j. f& J5 o-16 797.467" X* J h0 M5 q7 v) \! f
-15 753.028
& {% v8 Z( |- S6 Z8 T1 k/ r* y-14 711.338
4 [3 L9 q5 |* j1 P-13 672.211
, q# w% ] f U3 V-12 635.474! z: F, ^$ M8 Y0 C0 J, t: M) y
-11 600.967
3 N7 f1 q6 q8 X$ x8 H-10 568.543
) s- |7 H: M( B% A( V8 Z; ?8 O-9 538.0632 t4 h; c2 T1 n7 E+ n, }/ i0 u
-8 509.4 b. X+ }1 J/ o1 h& ^+ z! t
-7 482.435/ _: s6 U6 `9 y" P) _6 F
-6 457.057
# N% P4 }3 I9 B-5 433.1654 G9 N) ^1 i x* X8 z) O6 Y* l
-4 410.663% V, D; C% ]4 O! |0 p5 d
-3 389.4627 i+ i$ ^: c9 @: X+ V+ E
-2 369.479" N4 G* ]$ M( E4 m5 o7 s
-1 350.639
5 a2 e# @* d. m9 _; v, e/ n0 332.868* p. m0 K. R, o+ |# q4 b7 j' n& J
1 316.102- a" B* t/ ]+ J* ?
2 300.276
6 }0 g4 M4 y- f9 [; |/ b$ w3 285.334
6 s" T9 F4 Z! l4 271.221
5 j( l7 ~! z" }5 257.886
$ G) Q% v" K I2 h/ \6 245.283
4 m4 L* K5 I! s( {# X7 233.367
1 D* X2 D: @: X8 222.098
. X8 t% X2 ^; c: @# B9 211.435
$ ^9 K3 w5 s( x8 Y) q10 201.345# e" ~0 D! A7 F9 O- x) [9 s
11 191.792* Z& E. Y( d& O* B
12 182.746
8 d( ^7 J' X! p! T- q13 174.176
1 s7 p6 L9 j$ X: Y$ \6 _0 F14 166.056
A- |; w! n* l7 T2 ^! k/ n15 158.3598 u% K5 J+ F0 O5 ?
16 151.061 W. L% {/ ?* D9 ~! W3 c
17 144.138! F0 b8 ?, ?' G0 u3 u. X
18 137.571
\4 n& l4 M* D2 f% O; y4 N19 131.3395 `# X t/ P8 k1 ]- @$ A% ^9 P% {
20 125.423
4 {0 @* ~, t' K+ ]21 119.805
, k8 n7 d2 R& M& p22 114.4699 W4 N1 _% F' I( k, d* l
23 109.399* R1 e' p% t* H: I1 n4 y, ~- s
24 104.581) t- B! e' Z$ I& D
25 1003 Y1 h3 K2 R" V9 D$ f& D' O" l3 p
26 95.6443
8 n5 G: S6 G' N7 v/ J27 91.5013
( t( y8 c5 y* K' S/ P- }28 87.5596- @4 |. c( ^( c; P5 D
29 83.8083 P( y+ |$ z7 @7 j" z+ b5 T5 ^4 N
30 80.2372
* M! G" u6 i+ e* M! i8 k1 L31 76.8373 A7 | H9 g: P7 x- r4 I" [1 |% p
32 73.5984
* q1 u' x5 N8 ]7 A7 D33 70.5131
/ r4 ?# d" s; Z1 c. }( a# w1 k- W2 X34 67.573/ L1 Y b* i) ?) s! W7 J
35 64.7706
2 a( I6 o; ^& Y# [% b4 f9 Q36 62.0987
/ [6 F/ ^6 `% W8 A# b# [( S* j' v4 V37 59.5507 k) f0 Y+ Y6 F- x/ \
38 57.1202( Z/ c" A3 h/ w. q( \! |: q
39 54.8011' S+ [6 n. P8 x# j9 V
40 52.588( u9 k* y6 D. k3 ^/ V! h
41 50.4753
- J' j/ u4 W/ J9 }8 R" F3 I42 48.4581$ P, O* J8 [+ ], I# N) j$ C# J& k( R
43 46.5316
5 @& E! i# p8 Q n- S44 44.69134 j" X1 g- B* K! z, i
45 42.9333 E% s( r3 L3 |* l* q H+ I8 F% A
46 41.2525" D* S" o* ~$ F# j2 f$ _9 O! s
47 47.3965
$ H. W% O7 l9 S48 38.11# D$ S# C; Y0 |. A
49 36.6411) P# E$ a: A H6 n, f: n
50 35.236
# h; A9 @* A, k! H7 `51 33.89167 d1 R. g$ J" a# i
52 32.605+ s; }' |6 S3 ~
53 31.3734 n. ~! ~+ C7 Q& ]: H7 m: d- T
54 30.1944
I) |8 Q- D; U( Z) ]55 29.0653
3 P% H/ J0 \+ a3 ]3 E56 27.9839" C2 a( }; L5 U4 c5 D T/ H
57 26.9478
3 @( c2 Z& m4 T) D: _6 R, W) p58 25.9551
0 G! I, Z; M# G# v& j59 25.00360 Q+ x. Q9 u2 I, V7 Z
60 24.0915! O& H6 [' b4 f( y& Y* n
61 23.217
- l5 R, w$ z1 ~% T1 ]62 22.3784% t! E( }" J: Z1 ~6 f1 {) U
63 21.5742 r1 L4 _( Y9 _9 M% X, I
64 20.8022
}3 J% `9 W' @4 E6 X# J T65 20.0617
- u3 k( v- `" O7 a) y* f) I66 19.3515 j7 s2 X! g* l: i3 A8 i
67 18.6687 d8 i7 S+ o; m' A' u
68 18.0137& ~: _9 N j' I
69 17.38475 s: W0 {& ~' B
70 16.7805
# `( a2 ^2 U2 R0 T2 n$ N71 16.2001
8 [; d3 F0 a# `2 W3 G72 15.6424
1 ~" m- A6 p2 t73 15.1064
& N7 C& a4 W# e. h74 14.5913
5 d8 t+ i$ W; M. k' q A75 14.0965 W( r Q$ l; a: c' K; p
76 13.6198& B- y; M2 S0 N: d9 m
77 13.1618
1 I" e" ?0 c" q6 ?( L1 ~( m! N6 W78 12.7213
3 q* d2 b+ T. n U7 T79 12.2975
0 X$ Q" a0 C5 i% U0 a8 z80 11.8897
6 H: R5 u# x) w6 v! }81 11.4972
- c# B% z- [7 _" o1 ]" l82 11.11959 u9 ^, W1 h2 ?5 `) A
83 10.7558
+ \6 d7 _/ a) H3 n- \7 _84 10.4056
0 @+ h) Z8 H& i- E- g7 M$ M5 Q# O+ _85 10.0684
% r. f, Z# p4 _+ |5 R: t2 s86 9.7435
' e _- c" _( Z: }$ Y2 v+ O87 9.4306
- p) [- z- N3 Y88 9.1291
7 u4 p" U2 P, w% E" P( Z* u89 8.8385
# d, f6 N$ O/ K5 K90 8.5585" C. y2 ?) k% n- @4 |5 {! W
91 8.2885# e9 ^3 Z' E0 v) V2 Q. }
92 8.0283
. d7 b& _' D) P8 R# Z( K. n93 7.7773( l" e2 T, r& R0 `7 J( P- i! x: D( M
94 7.5352: w/ H3 S' F- R! s/ s& j7 S
95 7.3017! y% k7 B5 m6 T
96 7.0764. j6 ~7 r* m' Y* C- A0 l
97 6.8591
& X* e- F. e: q8 F9 Q7 W98 6.6493
$ C* a4 A5 \3 n8 @ w. b99 6.4469' ?2 v6 N. e3 L$ X' @: @1 L8 o2 m
100 6.2515
" f+ d( H% a- Q/ R/ G! E! J101 6.06281 u {4 Q3 \7 ^4 j" ?5 K/ O
102 5.8806
& l) z% h+ h" V103 5.7046
5 O e8 L3 }/ s9 p104 5.5347
+ P H0 Y- T, Y4 ], [* `% y8 l7 w105 5.3705; s' ~9 f" m* G4 U7 T) W
106 5.2119" E+ F: z% _; Q @" I: g8 L( P
107 5.0586
+ e7 q+ G. @% \$ l' Z108 4.91045 s" j# N. U+ R: a6 D
109 4.7672
, e6 ?2 m1 c! @8 y. B, v110 4.62885 R7 D1 w: [5 N4 L }
111 4.495
5 v A2 P1 Q' W$ _112 4.3655
) ~, ~% n" e) h T/ O! M113 4.2404
, V! O- i- k' ^' O( E! \+ E114 4.1193
% Q1 J4 [) m+ U5 _9 l! H" u% F7 [8 A$ z6 h |
|