Device for monitoring the movement of a person
US6127931A · kind A · utility
Inventor
Key dates
| Filing date | Aug 16, 1999 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Aug 16, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B21/0288
- WIPO fieldControl
- WIPO sectorInstruments
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.