Depth measuring apparatus for a dredger

Details Depth measuring apparatus for a dredger Depth measuring apparatus for a dredger

1986-02-07

1988-02-23

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

37DIG19, 356 72, G01B 1122

Patent

active

047266821

ABSTRACT:
The invention relates to a depth measuring apparatus for a dredger, comprising an inclination sensor mounted on the dredger arm, a receiver for receiving a radiation establishing a reference level, and an evaluation circuit connected to the receiver and to the inclination sensor. In a known measuring apparatus of this type, the receiver merely serves for calibrating a pressure sensor operative to indicate the position of the dredger arm relative to the body of the dredger. According to the invention, for improving the measuring accuracy the receiver is itself operable to determine the position of the radiation determining the reference level relative to the receiver, the thus obtained information being employed together with the inclination signal for determining the operating depth of the dredger scoop.

REFERENCES:
patent: 4034490 (1977-07-01), Teach

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