Title:
FAULT TOLERANT APPARATUS AND METHOD FOR DETERMINING A REVOLUTION RATE OF A GEAR
Document Type and Number:
WIPO Patent Application WO2003094408
Kind Code:
A3
Abstract:
An apparatus comprises an edge detector, a memory and a pulse-input engine. The edge detector is configured to receive an input signal and a counter signal. The edge detector is further configured to send a set of time values based on the input signal and the counter signal. Each time value from the set of time values is uniquely associated with a detected edge transition from the input signal. The memory is coupled to the edge detector. The memory is configured to receive from the edge detector the set of time values. The memory is configured to store the set of time values. The pulse-input engine is coupled to the memory. The pulse-input engine is configured to measure a set of pulse-to-pulse delays based on the set of time values stored in the memory.
Inventors:
BROWN DAVID R
MEYER MATTHEW C
MISHRA AJAY P
NORRIS JEFFREY A
RASMUSSEN DAVID C
MEYER MATTHEW C
MISHRA AJAY P
NORRIS JEFFREY A
RASMUSSEN DAVID C
Application Number:
PCT/US2003/013579
Publication Date:
May 13, 2004
Filing Date:
May 01, 2003
Export Citation:
Assignee:
INVENSYS SYS INC (US)
International Classes:
G01P3/489; G01R25/00; H04L; (IPC1-7): G06F19/00
Foreign References:
| US4081995A | 1978-04-04 | |||
| US5434800A | 1995-07-18 |
Other References:
See also references of EP 1500026A4
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