土壤探针阻抗计算方法的理论分析与试验研究-土壤学报.PDF
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39 1 Vol. 39, No. 1
20 02 1 ACTA PEDOLOGICA SINICA J n., 2 00 2
*
孙 宇 瑞
( , 100083)
TDRFD SWR ,
,
,
,
,
,
,
, , ,
S152- 7
[1]
Topp
,
- 2 - 2 - 4 2 - 6 3
= - 5. 3 10 + 2. 92 10 - 5. 5 10 + 4. 3 10 ( 1)
2 3
= 3. 03+ 9. 3+ 146. 0- 76. 7 ( 2)
, TDR( Time Dom in Re-
flectrometry) FD( Frequency Decomposition) SWR( St nding W ve R tio)
[ 2~ 4]
,
,
, ,
,
, ,
[ 5]
, ,
,
[ 6] [ 7]
Zegelin
,
* ( 1999001001)
: 2000- 09- 15; : 2001- 05- 30
1 : 12 1
,
1
1 1b 1c , Zegelin[ 7]
(
2) , 2d
Zege-
lin ,
,
2
1
[ 8]
,
Fig. 1 Soil-w ter-content probes with different
number of pins
,
[ 8]
:
Zl + j Zc t n l
Zp ( l ) = Zc Zc + j Zl t n l ( 3)
Z l
p
, Zc ,
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