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US 2004/0000993 A1Published application
Out-of-range detector
AssigneeKoninklijke Philips Electronics N.V.
InventorJin Lu
Life of this patent
Estimating the term…
Abstract
A monitoring system for monitoring a direction of a monitored device when the monitored device is positioned further than a predetermined distance from a monitoring device. The monitoring device receives a locator signal from the monitored device and produces a direction indication that indicates the direction of the received locator signal. If the monitoring device no longer receives the locator signal, the direction indication indicates the direction of the last received locator signal.
Claims14
A monitoring system comprising:
- a monitoring device;
- and
- a monitored device, wherein the monitoring device is configured to receive a locator signal from the monitored device and is configured to produce a direction indication indicating the direction of a last received locator signal if the locator signal is not received.
A method of monitoring a monitored device comprising the acts of:
- receiving a locator signal from the monitored device;
- and
- producing a direction indication indicating a direction of a last received locator signal if the locator signal is not received.
Dependencies are inferred from the claim text.