L-3 Communications Corporation

Michael E Weed

Endre M Berecz

Thomas Rosenbauer

Systems () and methods () for providing wireless health monitoring for a locator beacon (). The methods involve: coupling a Transponder and Sensor Module (TSM) to the locator beacon such that at least one condition of the locator beacon or a battery () of the locator beacon can be remotely monitored; periodically detecting the condition by the TSM (); and periodically and wirelessly transmitting, from the TSM to a wireless device () located in proximity to the TSM, a signal including information describing the condition detected by the TSM. The TSM can include, but is not limited to a transponder (e.g., an RFID tag) and sensor. The wireless device, can include, but is not limited to a transponder interrogator.

System and methods for wireless health monitoring of a locator beacon which aids the detection and location of a vehicle and/or people

An accelerometer has an acceleration transducer producing uncorrected analog acceleration signals representing vertical, lateral, and longitudinal components of acceleration. An error correction system is connected to the acceleration transducer for receiving the uncorrected analog acceleration signals. The error correction system includes a system controller for generating a plurality of correction coefficients, an analog to digital converter which converts the uncorrected analog acceleration signals to uncorrected digital acceleration signals, a filter for filtering the uncorrected digital acceleration signals, an error compensation circuit receiving the correction coefficients to compensate the uncorrected digital acceleration signals, and a digital to analog converter which converts the corrected digital acceleration signals to corrected analog acceleration signals. The error compensation circuit corrects for bias offset, cross-axis alignment errors, scaling errors, and thermal offset. The system controller arranges a plurality of calibration measurements into a matrix and inverts the matrix to calculate the correction coefficients.

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Venice, FL, United States of America

Michael E Weed