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United States of America Patent
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N/A
Issued Date -
Aug 21, 2014
app pub date -
Feb 21, 2013
filing date -
Feb 21, 2013
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A vehicle has a wireless receiver located a predetermined distance from a trailer mount. A wireless transmitter on the trailer is located at an end of the trailer opposite the end that attaches to a trailer mount on the vehicle and communicates with the wireless receiver on the vehicle. A controller on the vehicle monitors the power returns of the signal transmitted between the transmitter and the receiver. A hitch angle monitoring system monitors hitch angle over time. The controller monitors power returns of a signal transmitted from the transmitter to the receiver and estimates a distance between the transmitter and the receiver as a function of a path loss propagation of the transmitted signal. The trailer length is equal to the distance estimated by the controller at times when the hitch angle is zero minus the predetermined distance.
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