Patent ID: 7102505
Filing Date: 2006-09-05
Classification: G08B

Abstract:
1. A wireless sensor system, comprising: one or more wireless sensor units, each of said one or more wireless sensor units comprising at least one sensor configured to measure a condition, said wireless sensor unit configured to receive instructions; said wireless sensor unit configured to report data measured by said at least one sensor when said wireless sensor determines that data measured by said at least one sensor fails a threshold test, said one or more wireless sensor units operating in a low-power mode when not transmitting or receiving data, said one or more wireless sensors configured to transmit status information at regular intervals; one or more wireless repeater units, each of said one or more wireless sensor units configured to communicate with at least one of said one or more wireless repeater units, each wireless sensor unit configured to send communication packets comprising an identification field, each of said one or more wireless repeater units configured to communicate with a selected subset of said one or more wireless sensor units, said one or more wireless sensor units configured to communicate with said one or more wireless repeater units using frequency-hopping techniques to avoid collisions; a base unit configured to communicate with said one or more wireless router units and to provide data from said one or more sensor units to a monitoring computer, said monitoring computer configured to send a notification to a responsible party when data from one or more of said wireless sensor units corresponds to an emergency condition, said monitoring computer configured to log data from one or more of said wireless sensor units when said data from one or more of said wireless sensor units corresponds to an abnormal condition, said monitoring computer configured to compare measured results between a first unit of said one or more wireless sensor units and a second unit of said one or more wireless sensor units in an algorithm that determines whether a measured value exceeds a background noise level, wherein said first unit of said one or more wireless sensor units is located relatively near said second unit of said one or more wireless sensor units.