THEFT DETECTION NODES AND SERVERS, METHODS OF ESTIMATING AN ANGLE OF A TURN, METHODS OF ESTIMATING A DISTANCE TRAVELED BETWEEN SUCCESSIVE STOPS, AND METHODS AND SERVERS FOR DETERMINING A PATH TRAVELED BY A NODE
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United States of America Patent
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Issued Date -
Feb 14, 2013
app pub date -
Oct 22, 2012
filing date -
Jul 20, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
One aspect of the invention provides a theft detection node including: a power source; an accelerometer; a gyroscope; a transmitter; and a microcontroller in communication with the power source, the motion detector, and the transmitter. The microcontroller is programmed to determine whether the theft detection node is being transported and, if the theft detection node is being transported: estimate the distance traveled between successive stops and transmit the estimated distance to a server. Another aspect of the invention provides a method of determining a path traveled by a node. The method includes: generating a Hidden Markov Model having a plurality of hidden states, each hidden state corresponding to a road segment; receiving information from the node about one or more turns and the distance traveled between successive stops; and determining the most likely path for the distance between successive stops and a distance between successive turns.
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