2013 2013 11 17 * * * 2 * 6 6 * 1 2 * * *
1 1 1 1% 1
2 + + OFF 2 20 V V 2000 m200 mmv 1 mv 1000 1 V 2013
3 2 3 OFF 3 2000 kω1 kω 1000 Ω 4 4
4 5 5 5 A 24 A 12 B 6 C 12 24 D 6 2013
5 350 Ω; KFG-5-350-C1-11 L1M2R: 1 ; 100 Ω; PV36W101C01: 1 [] * 1 Ω [ ]: 4 * 22 Ω [ ]: 1 * 300 Ω [ ]: 1 * 360 Ω [ ]: 3 * 820 Ω [ ]: 1 Texas Instruments INA126 1 0.1 µf 2 2 2 16 12 X! 1 1 0.2 mm1 10 2 2 1 1 #600 1 1 1 5 5 1 1 1 1 1 2
6 1 1 6 4 6 V b = V 3,4 V 1,2 V 1,2 R 1 R 2 V 3,4 R 3 R 4 V b V 1,2 ( ) ( ) R 1 R 3 R 4 R 2 V b = V s = V s R 1 + R 2 R 3 + R 4 R 3 + R 4 R 1 + R 2 2013 (1)
1 7 R 1 R 2 = R 3 R 4 (2) R 3 R 3 + R 3 (1) V b ( ) R 3 R 3 + R 3 V b = V s R 3 + R 4 R 3 + R 3 + R 4 = V s R 4 R 3 (R 3 + R 3 + R 4 )(R 3 + R 4 ) R 3 R 3 R 3 R 4 R 4 + R 4 V b V b = V R 3 R 4 s (R 3 + R 4 + R 4 )(R 3 + R 4 ) R 4 1% (3) (4) (5) 100
8 1 INA126 Texas Instruments 2013
1 9 (1) 1.5 V 2 7 (2) R 3 8 +1.5 V A1 A5 R 3 360 Ω 364 Ω 1 Ω 8 R 3 R 4 (3) 9 10
10 1 9 R 3 A3 (4) 7 2 10 11 (5) 1 +1.5 V 1.5 V V s 11 (6) 1 V 1 2013
1 11 10 11 2 2 1
12 1 (7) R 3 362 Ω 8 A3 V 1 V 2 1 2 V 1 V 2 V 1 9 mv V 2 0.9 V V 2 V 1 100 V 1 V 2 V 2 /V 1 100 100 (8) V 1 V 2 (9) R 3 1 Ω 363 Ω A3 A2 V 1 V 2 (10) R 3 364 Ω361 Ω360 Ω V 1 V 2 (11) 1 +1.5 V 1.5 V V s (12) (13) R 3 = R 3 362 Ω V 2 (14) (4) R 3 = 362 ΩR 4 = 360 Ω V s 100 R 3 V 2 2013
2 13 2 1 (1) 12 1/3 2 cm 2 cm 12 (2) 13 (3) 13 1 2 1 (4)
14 2 13 (5) (6) 14 14 (7) 15 (8) 16 5 cm 2013
2 15 15 16 (9) 17 R 3 R 4 360 Ω (10) 1 +1.5 V 1.5 V V s (11) 1 V 1 1 (12) V 1 V 2
16 2 17 (13) 1 V 1 V 2 V 2 V 2 (14) V 2 2 V 1 V 2 V 2 V 2 (15) 3 4 5 V 2 (16) 2013
2 17 (17) 0 5 (18) 1 +1.5 V 1.5 V V s (19) V 2 1.0 g 4.5 g (20)
18 3 3 X X 10 X X 2 (1) (2) 1 (3) X (4) X 1 2013
19 18 V s 0 V s = I 1,2 (R 1 + R 2 ) = I 3,4 (R 3 + R 4 ) (6) V 1,2 = I 1,2 R 2 (7) V 3,4 = I 3,4 R 4 (8) V b V 3,4 V 1,2 (6) V b = I 3,4 R 4 I 1,2 R 2 (9) R 3 + R 4 I 1,2 = I 3,4 R 1 + R 2 (10) V s I 3,4 = R 3 + R 4 (11) (9) V b = V s ( R 4 R 3 + R 4 ) ( ) R 2 R 1 R 3 = V s R 1 + R 2 R 1 + R 2 R 3 + R 4 (12)
20 R 1 R 2 = R 3 R 4 (13) instrumentation amplifier Texas Instruments INA126 8 19 1 28 3 2 V in 6 5 V out V out V out = G V in G 19 INA126 G 1 8 R g INA126 G G = 5 + 80 kω R g R g = 820 + 22 = 842 Ω G = 5 + 80000 842 100 2013
21 7 4 INA126 ±1.35 V ±18 V 0.1 µf 20 3 2 1-2 2-3 2 3 100 Ω 1 Ω 20 ; PV36W101C01 % 10%
2013 2013