| CPC G08G 1/042 (2013.01) [H04W 4/44 (2018.02)] | 20 Claims |
|
1. A traffic sensor detection system for detecting induction loop traffic sensors, comprising:
a sensor housing configured to be mounted to a vehicle, the sensor housing containing a receiver coil, wherein the receiver coil generates a voltage signal responsive to detecting a magnetic field emanating from an induction loop embedded in a roadway;
an amplifier circuit that receives the voltage signal and generates an analog output;
a bandpass filter that filters the analog output to isolate a frequency range of 20-120 KHz corresponding to operational frequencies of existing induction loop traffic sensors to generate a filtered signal;
a power detection circuit that measures a power level of the filtered signal;
an analog-to-digital converter that receives the power level measurements and generates a digital output;
a microprocessor that processes the digital output to determine a location of the induction loop relative to the sensor housing and generates an output signal indicating positioning information for the vehicle relative to the detected induction loop;
a transmitter that transmits the output signal indicating the determined location of the induction loop; and
a receiver device in communication with the transmitter, wherein the receiver device receives the output signal and provides navigational guidance to assist a driver in positioning the vehicle over the detected induction loop.
|