Browse Prior Art Database

Localization Device

IP.com Disclosure Number: IPCOM000113698D
Original Publication Date: 1994-Sep-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Mannhart, J: AUTHOR

Abstract

An electronic system is described which includes a number of small detectors. The detectors are attached to things, animals or persons in order to reveal their position automatically in 3-dimensional space. The system is designed in a way that large numbers (>100) of detectors can be operated independently. Thus, the position of an equally large number of objects can be traced with erase.

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This is the abbreviated version, containing approximately 71% of the total text.

Localization Device

      An electronic system is described which includes a number of
small detectors.  The detectors are attached to things, animals or
persons in order to reveal their position automatically in
3-dimensional space.  The system is designed in a way that large
numbers (>100) of detectors can be operated independently.  Thus, the
position of an equally large number of objects can be traced with
erase.

The operating principle is the following:
  1.  In the area (room, building) in which the detector is to be
      located, an rf-signal is emitted by a control unit.  This
signal
      contains in particular an address code that specifies the
device
     that is searched and a timing pulse P1.
  2.  The detector which is to be located monitors the rf-band of the
      control unit.  In case it identifies its own address, it waits
for
      the timing signal P1 and then sends out a second timing pulse
P2.
  3.  One or several receivers, which are distributed in the area to
be
      monitored, receive both timing pulses and measure their time
      difference.  The time difference is transmitted to the control
      unit.  Based on the time differences and the position of the
      receivers, the control unit calculates the position of the
object
      that is searched.

      As power sources for the detectors unit one may use a small
battery.  In some cases even solar cells, power generated...