Patent ID: 9530311
Filing Date: 2016-12-27
CPC Classification: G08G

Claim Text:
1. A traffic information detection system comprising: at least one loop coil installed so as to detect whether or not a vehicle exists on a road, and the travel velocity and type of the vehicle; a loop detection device receiving a signal indicative of the electric change induced in the loop coil by a vehicle so as to determining whether or not a vehicle exists on a road, and the velocity and type of the vehicle, the loop detection device being installed at the central line or a safety zone of the road; and a traffic signal controller wirelessly receiving the signal determined by the loop detection device, thereby acquiring traffic information, wherein the loop detection device comprises: at least one solar cell plate installed at the central line or the safety zone of the road; an exchangeable primary battery for supplying power to an internal circuitry of the loop detection device; an electric energy accumulation means for accumulating power received from the solar cell plate so as to extend the lifespan of the primary battery; an ID storage unit for storing the identification (ID) of the loop detection device; and a loop detector circuit unit receiving power from the primary battery and the electric energy accumulation means, the loop detector circuit unit detecting a loop characteristic change produced in at least one loop, packeting the detected result with the ID stored in the ID storage unit, and transmitting the packeted data through a wireless transceiving unit.