Time domain reflectometry system for real-time bridge scour dete

Details Time domain reflectometry system for real-time bridge scour dete Time domain reflectometry system for real-time bridge scour dete

1997-09-15

1998-07-21

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Underwater system

367 13, H04B 1700

Patent

active

057843384

ABSTRACT:
An apparatus for detecting and monitoring scouring around a structural mer uses time-domain reflectometry (TDR) to measure the level of sediment around the submerged portion of a structural member such as a bridge pier, dock, utility crossing, or similar structure. The apparatus includes an electrical pulse generator which transmits a series of electrical pulses, a sensor which is connected with the pulse generator, and a signal analyzer which receives and interprets the portion of the electrical pulses reflected back to the source from an interface, such as water/air or water/gravel, to calculate the position of the interface along the sensor. Knowledge of the position of the interfaces before and after a scouring event and of the dielectric constants of the surrounding media allows the user to detect and monitor the level of erosion caused by scouring.

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