USE OF LOW FREQUENCY ELECTROMAGNETIC SIGNALS TO DETECT OCCLUDED ANOMALIES BY A VEHICLE

The present technology is directed to a sensor system. The sensor system may include a transmitter on a vehicle configured to transmit an electromagnetic signal in the frequency range 0.1 Hz to 10 kHz resulting in an electromagnetic field. The sensor system may also include a receiver on the vehicle configured to receive a secondary electromagnetic signal from a metallic or conductive object surrounding the vehicle, wherein the secondary electromagnetic signal represents the disturbance the electromagnetic field created by the electromagnetic signal from the vehicle. The present technology is also directed to a processor configured to determine that the magnitude of the disturbance caused by the secondary electromagnetic field is above a threshold. When the magnitude of the disturbance is above a threshold, it can be reasoned that there is an anomaly causing the disturbance that is likely a large metallic object. In some environments, it can be inferred that the disturbance is likely a second vehicle near the first vehicle.