System and method for traffic preemption emitter type detection and response
First Claim
Patent Images
1. A traffic preemption system comprising:
- a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses;
a detection unit configured to;
receive the signal transmitted by the vehicle preemption unit;
identify a characteristic of the vehicle preemption unit using the one or more identifying pulses; and
calculate a timing delay based on the identified characteristic of the vehicle preemption unit; and
an intersection preemption unit configured to;
receive the timing delay from the detection unit; and
change a traffic light in response to the timing delay, wherein the characteristic of the vehicle preemption unit identified comprises at least one of a model and a manufacturer of the vehicle preemption unit.
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Accused Products
Abstract
A traffic preemption system comprising a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses, a detection unit configured to, receive the signal transmitted by the vehicle preemption unit, identify a characteristic of the vehicle preemption unit using the one or more identifying pulses, and calculate a timing delay based on the identified characteristic of the vehicle preemption unit, and an intersection preemption unit configured to receive the timing delay from the detection unit and change a traffic light in response to the timing delay.
28 Citations
25 Claims
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1. A traffic preemption system comprising:
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a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses; a detection unit configured to; receive the signal transmitted by the vehicle preemption unit; identify a characteristic of the vehicle preemption unit using the one or more identifying pulses; and calculate a timing delay based on the identified characteristic of the vehicle preemption unit; and an intersection preemption unit configured to; receive the timing delay from the detection unit; and change a traffic light in response to the timing delay, wherein the characteristic of the vehicle preemption unit identified comprises at least one of a model and a manufacturer of the vehicle preemption unit. - View Dependent Claims (2, 3, 4)
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5. A traffic preemption system comprising:
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a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses; a detection unit configured to; receive the signal transmitted by the vehicle preemption unit; identify a characteristic of the vehicle preemption unit using the one or more identifying pulses; and calculate a timing delay based on the identified characteristic of the vehicle preemption unit; and an intersection preemption unit configured to; receive the timing delay from the detection unit; and change a traffic light in response to the timing delay, wherein the vehicle preemption unit further comprises an output signal power detector configured to measure a signal strength of the signal transmitted by the vehicle preemption unit. - View Dependent Claims (6, 18, 19, 20)
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7. A traffic preemption system comprising:
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a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses; a detection unit configured to; receive the signal transmitted by the vehicle preemption unit; identify a characteristic of the vehicle preemption unit using the one or more identifying pulses; and calculate a trip point based on the identified characteristic of the vehicle preemption unit and an estimated speed of the vehicle; and an intersection preemption unit configured to; receive the trip point from the detection unit; and change a traffic light in response to the trip point received, wherein the characteristic of the vehicle preemption unit identified comprises at least one of a model and a manufacturer of the vehicle preemption unit and the detection unit is further configured to normalize a pulse amplitude of the signal received from the vehicle preemption unit based on the characteristic of the vehicle preemption unit that is identified. - View Dependent Claims (8, 11)
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9. A traffic preemption system comprising:
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a vehicle preemption unit configured to mount to a vehicle and transmit a signal comprising one or more identifying pulses; a detection unit configured to; receive the signal transmitted by the vehicle preemption unit; identify a characteristic of the vehicle preemption unit using the one or more identifying pulses; and calculate a trip point based on the identified characteristic of the vehicle preemption unit and an estimated speed of the vehicle; and an intersection preemption unit configured to; receive the trip point from the detection unit; and change a traffic light in response to the trip point received, wherein the vehicle preemption unit further comprises an output signal power detector configured to measure a signal strength of the signal transmitted by the vehicle preemption unit. - View Dependent Claims (10, 21, 22)
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12. A traffic preemption method comprising:
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transmitting a signal comprising one or more identifying pulses by a vehicle preemption unit mounted to a vehicle; receiving the signal by a detection unit; identifying, by the detection unit, a characteristic of the vehicle preemption unit using the one or more identifying pulses; adjusting, by the detection unit, an amplitude of a signal output by the detection unit based on the identified characteristic of the vehicle preemption unit; receiving, by an intersection preemption unit, the amplitude-adjusted signal output from the detection unit; and changing, by the intersection preemption unit, a traffic light in response to the amplitude-adjusted signal received by the intersection preemption unit, wherein the characteristic of the vehicle preemption unit identified comprises at least one of a model and a manufacturer of the vehicle preemption unit and the method further comprises normalizing a pulse amplitude of the signal received from the vehicle preemption unit based on the characteristic of the vehicle preemption unit that is identified. - View Dependent Claims (13, 14, 15)
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16. A traffic preemption method comprising:
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transmitting a signal comprising one or more identifying pulses by a vehicle preemption unit mounted to a vehicle; receiving the signal by a detection unit; measuring, by an output signal power detector of the vehicle preemption unit, a signal strength of the signal transmitted by the vehicle preemption unit; identifying, by the detection unit, a characteristic of the vehicle preemption unit using the one or more identifying pulses; adjusting, by the detection unit, an amplitude of a signal output by the detection unit based on the identified characteristic of the vehicle preemption unit; receiving, by an intersection preemption unit, the amplitude-adjusted signal output from the detection unit; and changing, by the intersection preemption unit, a traffic light in response to the amplitude-adjusted signal received by the intersection preemption unit. - View Dependent Claims (17, 23, 24, 25)
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Specification