Patent ID: 9373256
Filing Date: 2016-06-21
CPC Classification: G01S,G01V,G06Q,G08G,H04W

Claim Text:
1. A vehicle presence detection system, comprising: a plurality of transmitters, wherein each of said plurality of transmitters is associated with a parking space in a group of parking spaces to monitor, wherein said plurality of transmitters are each attached to a parking space in said group of parking spaces so that when a vehicle is parked in said parking space said vehicle substantially covers a transmitter for said parking space; a main receiver adapted for receiving a radio wave signal from each of said plurality of transmitters, wherein said main receiver is attached to a ceiling within a building structure above said plurality of transmitters, wherein said main receiver is positioned in a central portion of said plurality of transmitters; and a control unit in communication with said main receiver, wherein said control unit determines a signal strength of said radio wave signal received by said main receiver, wherein said control unit determines that a vehicle is near a selected transmitter of said plurality of transmitters when said signal strength of said radio wave signal for said selected transmitter is reduced by a threshold loss.