Device for monitoring the movement of a person
First Claim
1. A device for monitoring the movement of a person, said device comprising:
- a) a homing unit including;
i) means for independently generating a homing signal; and
ii) means for transmitting said homing signal at predetermined intervals;
b) a base unit including;
i) means for receiving said homing signal;
ii) means for processing said homing signal to determine whether said homing unit is within a predetermined distance from said base unit and generating an alarm signal upon determining said homing unit is at a distance from said base unit greater than said predetermined distance, said processing means determining a time between receipt of the sequentially transmitted homing signals and strength of said signal to determine a distance between said base unit and said homing unit;
iii) means for alerting a user that said homing unit has moved a distance greater than said predetermined distance from said base unit upon receipt of said alarm signal from said processing means;
iv) means for adjusting said predetermined distance;
v) means for adjusting a reference time period utilized by said processing means for determining said predetermined distance; and
c) means in said homing unit for establishing the monitoring area by setting the strength of the homing signal.
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Accused Products
Abstract
A device for monitoring the movement of a person including a homing unit and a base unit. The homing unit includes a device for generating a homing signal and a transmitter for transmitting the homing signal at predetermined intervals. The base unit includes a receiver for receiving the homing signal, a processor for processing the homing signal to determine whether the homing unit is within a predetermined distance from the base unit and generating an alarm signal upon determining the homing unit is at a distance from the base unit greater than the predetermined distance. An alarm is provided on the base unit for alerting a user that the homing unit has moved a distance greater than the predetermined distance from the base unit upon receipt of the alarm signal from the processor. The alarm is at least one of an audible alarm, a visible alarm and a vibratory alarm. At least one of the base unit and homing unit includes a device for adjusting the predetermined distance. The processor determines a time between receipt of sequentially transmitted homing signals to determine the distance between the base unit and homing unit. The base unit further includes a display for displaying the distance between the base unit and homing unit and a direction to the homing unit from the base unit.
152 Citations
13 Claims
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1. A device for monitoring the movement of a person, said device comprising:
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a) a homing unit including; i) means for independently generating a homing signal; and ii) means for transmitting said homing signal at predetermined intervals; b) a base unit including; i) means for receiving said homing signal; ii) means for processing said homing signal to determine whether said homing unit is within a predetermined distance from said base unit and generating an alarm signal upon determining said homing unit is at a distance from said base unit greater than said predetermined distance, said processing means determining a time between receipt of the sequentially transmitted homing signals and strength of said signal to determine a distance between said base unit and said homing unit; iii) means for alerting a user that said homing unit has moved a distance greater than said predetermined distance from said base unit upon receipt of said alarm signal from said processing means; iv) means for adjusting said predetermined distance; v) means for adjusting a reference time period utilized by said processing means for determining said predetermined distance; and c) means in said homing unit for establishing the monitoring area by setting the strength of the homing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification