SYSTEMS AND METHODS FOR MONITORING WHEELED VEHICLES USING RADIO FREQUENCY IDENTIFICATION (RFID) DEVICES
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United States of America Patent
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Issued Date -
Nov 16, 2017
app pub date -
Jul 10, 2017
filing date -
Jan 13, 2015
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Abstract
Various embodiments of a system for tracking and/or controlling wheeled vehicles (such as shopping carts), are described. In some embodiments, the system includes an RFID tag on the cart and an RFID reader device external to the cart. The tag can receive an interrogation signal from the reader and reply with a response signal. In various embodiments, the reader or a central control unit can perform various calculations based on the response signal, such as generating a received signal strength indication (RSSI) value. In some embodiments, based on the RSSI value or otherwise, the reader can send a command signal to the tag to take an action, such as to engage a brake mechanism.
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