Pedestrian warning system
First Claim
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1. A pedestrian warning system, comprising:
- at least two ultrasonic emitters provided on a vehicle configured to emit ultrasonic signals, having different frequencies, and configured to create a shaped ultrasonic field, wherein the ultrasonic emitters are further configured to cause the ultrasonic signals to interfere with each other to generate a sonic signal to warn pedestrians in a specific area that the vehicle is approaching.
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Abstract
A pedestrian warning system includes an ultrasonic emitter provided on a vehicle configured to emit an ultrasonic signal and configured to create a shaped ultrasonic field. The ultrasonic emitter may be configured to generate a sonic signal to warn pedestrians in a specific area that the vehicle is approaching.
20 Citations
20 Claims
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1. A pedestrian warning system, comprising:
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at least two ultrasonic emitters provided on a vehicle configured to emit ultrasonic signals, having different frequencies, and configured to create a shaped ultrasonic field, wherein the ultrasonic emitters are further configured to cause the ultrasonic signals to interfere with each other to generate a sonic signal to warn pedestrians in a specific area that the vehicle is approaching. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A pedestrian warning system, comprising:
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an ultrasonic signal source configured to generate at least two ultrasonic signals;
a signal modulator configured to modify at least one of the signals from the ultrasonic signal source to create at least two different ultrasonic signals and at least one ultrasonic emitter provided on a region of a vehicle configured to emit the ultrasonic signals and configured to create a shaped ultrasonic field, wherein the at least one ultrasonic emitter is configured to cause the ultrasonic signals to interfere with each other to generate a sonic signal to warn pedestrians in a specific area that the vehicle is approaching. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method for automatically generating a warning sound, comprising:
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generating two ultrasonic signals having different frequencies;
providing at least two ultrasonic emitters on a vehicle to emit the ultrasonic signals; and
positioning the at least two ultrasonic emitters on the vehicle to create a shaped ultrasonic field and to cause the ultrasonic signals to interfere with each other to generate a sonic signal to warn pedestrians in a specific area that the vehicle is approaching.
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Specification