| CPC G08G 1/087 (2013.01) [G08G 1/095 (2013.01)] | 10 Claims |
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1. A traffic light control system for emergency vehicles comprising
a plurality of directional microphones, a band pass filter circuit, a threshold circuit, a relay circuit, a timing circuit, and a plurality of lamp circuits;
wherein the plurality of directional microphones, the band pass filter circuit, the threshold circuit, the relay circuit, the timing circuit, and the plurality of lamp circuits are electrically interconnected;
wherein the plurality of directional microphones capture audible sounds from the environment and the audible sound of the siren of the emergency vehicle;
wherein each directional microphone selected from the plurality of directional microphones;
wherein each selected directional microphone acts as a sensor to captures audible sounds from a field of view;
wherein when used with the plurality of directional microphones, term “center axis” refers to a vector that is directed from the sensor to the center of the area that forms the field of view;
wherein the center axis of the field of view of each selected directional microphone is aligned in a perpendicular direction to a field of illumination that is generated by the plurality of lamp circuits;
wherein the plurality of directional microphones captures the audible sound of the siren of the emergency vehicle;
wherein the plurality of directional microphones converts the captured audible sounds into the first electric signal;
wherein the plurality of directional microphones transmits the first electric signal to the band pass filter circuit;
wherein the band pass filter circuit forms a band pass filter that is tuned to the harmonic signature of the siren of the emergency vehicle;
wherein the band pass filter circuit receives the first electric signal from the plurality of directional microphones;
wherein the band pass filter circuit reduces the amplitudes of the higher and lower frequencies from the first electric signal to generate a second electric signal;
wherein the band pass filter circuit transmits the second electric signal to the threshold circuit structure that acts as a switch and triggered by the amplitude of the second electric signal;
wherein the second electric signal serves as a proxy for the amplitude of the siren of the emergency vehicle;
wherein when the amplitude of the second electric signal is greater than a predetermined value, the threshold circuit structure initiates the actuation of the relay circuit to a closed position;
wherein when the amplitude of the second electric signal is less than a predetermined value, the threshold circuit structure initiates the actuation of the relay circuit to an open position;
wherein the traffic light control system for emergency vehicles is configured for use with a road network;
wherein the traffic light control system for emergency vehicles controls one or more traffic control signals;
wherein the traffic light control system for emergency vehicles detects the presence of an emergency vehicle that:
a) is operating as a privileged vehicle under traffic regulations; and,
b) is approaching a traffic intersection;
wherein the traffic light control system for emergency vehicles illuminates a beacon about the oncoming emergency vehicle responsive to the actuation of the relay circuit to the closed position.
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