Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
Assessment of the Automation Algorithm for TDR Bridge - Ohio ...
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3.2 <strong>Algorithm</strong>s <strong>for</strong> <strong>TDR</strong> Signal Interpretation<br />
• Dielectric mixing <strong>for</strong>mula <strong>for</strong> scour estimation<br />
n<br />
α ( K ) = υ ( K )<br />
a,<br />
m<br />
∑<br />
i=<br />
1<br />
i<br />
a,<br />
i<br />
L 1 Ka,<br />
w + L2<br />
Ka,<br />
bs = L Ka,<br />
m<br />
K<br />
K<br />
a,<br />
m<br />
a,<br />
w<br />
=<br />
x<br />
L<br />
⎛<br />
⎜<br />
⎜<br />
⎝<br />
K<br />
K<br />
a,<br />
bs<br />
a,<br />
w<br />
α<br />
⎞<br />
−1⎟<br />
+ 1<br />
⎟<br />
⎠<br />
(Birchak et al. 1974)<br />
Water L1<br />
Sediment L2<br />
Setting <strong>the</strong> thickness <strong>of</strong> sediment L2 equal to x<br />
Dielectric scour estimation equation<br />
Approximate linear relationship between √K a,m and<br />
sediment thickness<br />
Sediment thickness can be estimated from measured K a,m<br />
39
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