Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Distributive type parameters
Reexamination Certificate
2005-02-08
2005-02-08
Patidar, Jay (Department: 2858)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Distributive type parameters
C324S637000
Reexamination Certificate
active
06853200
ABSTRACT:
A method for retrieving predetermined locations in sewer and pipeline systems after application or deposition of a layer of material. A carrier vehicle having a microwave sensor emits microwave signals and receives backscattered microwave signals. A first run is conducted inside the sewer or pipeline system before application or deposition of the layer of material. A first temporal signal profile of the backscattered microwave signals is recorded and the sought locations are marked in the first signal profile. After the application or deposition of the layer of material, a second run is conducted. A second temporal signal profile of the backscattered signals is recorded. The current position of the vehicle in the sewer or pipeline system relative to the sought locations is determined by comparison with the first signal profile.
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Hartrumpf Matthias
Kuntze Helge-Björn
Munser Roland
Benson Walter
Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung
Patidar Jay
Venable LLP
Yee Edward W.
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