| US 7,545,269 B2 | ||
| Cellular telephone-based wide-area radiation detection network | ||
| William W. Craig, Pittsburg, Calif. (US); and Simon E. Labov, Berkeley, Calif. (US) | ||
| Assigned to Lawrence Livermore National Security, LLC, Livermore, Calif. (US) | ||
| Filed on Sep. 29, 2006, as Appl. No. 11/540,176. | ||
| Application 11/540176 is a division of application No. 10/632169, filed on Jul. 30, 2003, granted, now 7,148,484. | ||
| Claims priority of provisional application 60/442361, filed on Jan. 24, 2003. | ||
| Prior Publication US 2007/0018806 A1, Jan. 25, 2007 | ||
| Int. Cl. G08B 1/08 (2006.01) | ||
| U.S. Cl. 340—539.26 [340/539.11; 340/539.29] | 30 Claims |
| 1. A radiation detection network, comprising:
a central monitoring system having a data server connected to a wireless communications network; and
a plurality of mobile radiation detection instruments for use by a plurality of mobile users in a geographic region so that
the instruments are widely and dynamically distributed in the geographic region, each instrument comprising: a mobile communications
device having wireless means for communicating with the data server of the central monitoring system over the wireless communications
network as the user moves about in the geographic region with the instrument; a radiation detector operably connected to said
mobile communications device for measuring the individual energies of detected photons; a clock-calendar operably connected
to said mobile communications device for determining the time-date associated with each detected photon; and a locator operably
connected to said mobile communications device for determining the location of said instrument associated with each detected
photon, said mobile communications device adapted to transmit data of the individual photon energies and the corresponding
detection time-dates and detection locations associated with each to the data server of said central monitoring system,
wherein said central monitoring system includes means for collectively analyzing said data received from the plurality of
mobile radiation detection instruments to produce a background radiation map of the geographic region as a function of at
least the time-date and location data accumulated in the course of user movement in the geographic region, and to detect,
identify and/or track a radiation source(s) in the geographic region by determining correlations and deviations against the
background radiation map.
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