System for determining failure of remote sensing device
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United States of America Patent
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Feb 10, 1998
Grant Date -
N/A
app pub date -
Sep 3, 1996
filing date -
Sep 3, 1996
priority date (Note) -
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Abstract
A system for detecting failure in one of a plurality of remote sensing devices utilizes a plurality of counters, each associated with one of the remote sensing devices. Each counter is initially loaded with an initial value. When a signal is received from a remote sensing device, its associated counter is reset to the initial value while the counters of the other remote sensing devices are stepped down. If a sensing device does not send a signal, its associated counter is stepped down numerous times, but never reset to the initial value. When a counter reaches a pre-determined value, typically zero, the associated sensing device is deemed to have failed.
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