发明名称 Cart braking control during mechanized cart retrieval
摘要 A vehicle tracking system includes a wheel containing sensor circuitry capable of sensing various types of conditions, such as wheel rotation, wheel vibration caused by skidding, and specific electromagnetic and/or magnetic signals indicative of particular wheel locations. The sensor circuitry is coupled to an RF transceiver, which may but need not be included within the wheel. The wheel may also include a brake mechanism. In one embodiment, the wheels are placed on shopping carts and are used to collect and monitor shopping cart status and location data via a wireless network. The collected data may be used for various purposes, such as locking the wheel of an exiting cart if the customer has not paid, estimating numbers of queued carts, stopping wheel skid events that occur during mechanized cart retrieval, store planning, and providing location-based messaging to customers.
申请公布号 US8406993(B2) 申请公布日期 2013.03.26
申请号 US20080200771 申请日期 2008.08.28
申请人 HANNAH STEPHEN E.;CARTER SCOTT J.;JAMES JESSE M.;GATEKEEPER SYSTEMS, INC. 发明人 HANNAH STEPHEN E.;CARTER SCOTT J.;JAMES JESSE M.
分类号 G01C21/00 主分类号 G01C21/00
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