eee4204 im 003a nts (students) - sensing elements

8/18/2019 EEE4204 Im 003a Nts (Students) - Sensing Elements

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003: EG CE (EC K), IE

, :

1. (3 E), J . B,/ H 1995

2. E I (2 E), D C, H 1978

1 : G (2016)


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1 D , 2

2 I / 2

3 D / 24 A

2

2 : G (2016)

√


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3 : G (2016)


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( )

: ,

:

: D 0.5 100 + 0.2% 0.008% 1 Ω/

4 : G (2016)


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,

, = /

A, =∆

/

() ().

5 : G (2016)


6/40

A . A ,

, . H,

6 : G (2016)

,

, / .

D E , /

.


7/40

.

7 : G (2016)


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: 100 +800C

. : 0.3C/10

: , , :

/ ,

: 200 +800C

8 : G (2016)


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9 : G (2016)


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G :

A . .

10 : G (2016)


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A (0°C), the boiling point of water (100°C), and the freezing point ofzinc (419.6°C). The corresponding resistance values are100.0Ω, 138.5Ω, and 253.7Ω. The algebraic form of theinterpolation equation is:

Find the numerical form of the interpolation equation.

11 : G (2016)


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12 : G (2016)


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: , , , ,

(C)

G E:

13 : G (2016)


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14 : G (2016)

A θ

.


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I θ θ ( ), :

E C : 12Ω 25C (298 K) 0.95Ω 100C (373 K) H 1C/7

15 : G (2016)


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(θ ) θ K (θ ) = α exp( β /θ ). Given that the

resistance at the ice point (θ = 273.15K) is 9.00 kΩ andthe resistance at the steam point is 0.50 kΩ, find the

resistance at 25°C.

16 : G (2016)


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17 : G (2016)


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C

,

.

.

.

18 : G (2016)


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19 : G (2016)


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20 : G (2016)

:

:


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:

: 0.250.4

21 : G (2016)


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G F(G)

F , :

I , :

∆ . .

22 : G (2016)


23/40

. .

A

.

23 : G (2016)


24/40

F , = ρ ,

:

24 : G (2016)


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25 : G (2016)


26/40

D .

26 : G (2016)


27/40

B .

D , .

27 : G (2016)


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28 : G (2016)


29/40

A 2 .

φ , .

2 +45° ( , +) 45° ( , )

. 4 2

.

A 2 4 2 4.

29 : G (2016)


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30 : G (2016)


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:

A 2 4

. , . .

31 : G (2016)


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A 2 . 2

.

( +) ( ). 4 2

2 . A 2 4

2 4.

32 : G (2016)


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33 : G (2016)


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:

A 2 4 . , . .

,

, = /

() A (2).

34 : G (2016)


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0 200°C.

G Ω °C is given byR T = 0(1+αT+βT

2) 0 = 100.0, 100 = 138.50, 200 = 175.83Ω :

() α and β() 100°C as a percentage of

full-scale deflection.

35 : G (2016)


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36 : G (2016)


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F . G

0.5,

.

37 : G (2016)


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38 : G (2016)


39/40

: G (2016) 39


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E

: G (2016) 40

eee4204 im 003a nts (students) - sensing elements

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