Electronic winch monitoring system

Details Electronic winch monitoring system Electronic winch monitoring system

2006-06-20

2006-06-20

Matecki, Kathy (Department: 3654)

Implements or apparatus for applying pushing or pulling force

Apparatus for hauling or hoisting load, including driven...

Device includes rotatably driven, cable contacting drum

C254S377000

Reexamination Certificate

active

07063306

ABSTRACT:
An electronic winch monitoring system for a winch having a fixed-ratio gearbox with input and output shafts, a winch drum connected to the output shaft, and an auxiliary brake connected to the output shaft activated by reducing the pressure in a brake release hydraulic circuit. The system comprises an input shaft speed sensor, an output shaft speed sensor, and an electronic control unit having a monitoring section and a brake control section. The monitoring section receives the speed signals, processes them to produce a calculated ratio of actual input to output shaft speeds, and produces a fault indication signal when the value of the difference between the calculated speed ratio and the fixed ratio exceeds a predetermined value. The brake control section, upon receiving the fault signal, reduces the hydraulic pressure in the brake circuit using a nonlinear pressure-time profile to engage the auxiliary brake and stop the winch drum.

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David Taylor, The great North Sea crane swap . . . , Business and Management Practices and Cranes Today, Apr. 2003, p. 42, ISSN: 0307-0018. Copyright 2003 Gale Group, Inc. and Copyright 2003 Wilmington Publishing Ltd., USA.

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