Patent ID: 6218945
Filing Date: 2001-04-17
Classification: A61B,G08B

Abstract:
A system to provide for identifying a locational reference for a monitored person, the system comprising:a) a monitored person device to be moved about with the monitored person during movement of the monitored person, the monitored person device comprising transmitting means to provide for generating a signal;b) a companion device about which the monitored person may freely move wherein the monitored person remains within a predefined spacing about the companion device, the companion device comprising:1) receiving means to provide for reception of the signal produced by the transmitting means of the monitored person device;2) transmitting means to provide for sending a signal to a detached receiving unit;c) locational determining means to provide for producing information from which a locational reference may be created indicative of a locational position of the companion device;d) computational means to provide for determining a locational position of the monitored person device utilizing at least:1) the information of the locational determining means indicative of the locational position of the companion device;2) the signal from the monitored person device received by the receiving means of the companion device;wherein the locational position of the companion device may be determined then a locational position of the monitored person device is determined based upon a determining of a spacing and an orientation of the monitored person device relative to the companion device, and;e) conversion means to provide for converting the locational position of the monitored person device to the locational reference for the monitored person.