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US 5,905,433 AGranted
Trailer communications system
AssigneeHighwayMaster Communications, Inc.
InventorLarry C. Wortham
Life of this patent
Estimating the term…
Abstract
A trailer communications system (36) is provided. The system (36) includes a trailer transducer unit (22) for location on a trailer (12). A vehicle transducer unit (24) can be located on a vehicle (26, 28, 30) or a stationary object (32). The trailer transducer unit (22) and the vehicle transducer unit (24) may communicate information in the form of acoustic signals broadcast at an ultrasonic frequency in response to a predetermined event.
Claims31
A trailer communications system comprising:
- a trailer transducer unit for location on a trailer;
- a vehicle transducer unit for location on a vehicle;
- and
- the trailer transducer unit and the vehicle transducer unit operable to communicate information in the form of acoustic signals broadcast at an ultrasonic frequency in response to a predetermined event.
1 more element
A trailer communications system comprising:
- a trailer transducer unit for location on a trailer, the trailer transducer unit operable to store trailer identification information uniquely identifying the trailer, the trailer transducer unit operable to transmit the trailer identification information in the form of an acoustic signal broadcast at an ultrasonic frequency in response to a predetermined event;
- and
- a vehicle transducer unit for location on a vehicle, the vehicle transducer unit operable to receive the trailer identification information transmitted by the trailer transducer unit.
A system for communication between a trailer and a vehicle, comprising:
- a trailer transducer unit located on the trailer, the trailer transducer unit comprising:
- a trigger circuit operable to detect a predetermined event;
- a first microprocessor coupled to the trigger circuit, the first microprocessor operable to generate an electrical signal for conveying information in response to the detection of the predetermined event;
- and
- a first ultrasonic transducer coupled to the first microprocessor, the first ultrasonic transducer operable to convert the electrical signal generated by the first microprocessor into an acoustic signal, the first ultrasonic transducer operable to transmit the acoustic signal at an ultrasonic frequency;
- and
- a vehicle transducer unit located on the vehicle, the vehicle transducer unit comprising:
- a second ultrasonic transducer operable to receive the acoustic signal transmitted by the first ultrasonic transducer of the trailer transducer unit, the second ultrasonic transducer further operable to convert the acoustic signal into an electrical signal;
- and
- a second microprocessor coupled to the second ultrasonic transducer, the second microprocessor operable to process the electrical signal from the second ultrasonic transducer to recover the information.
7 more elements
Dependencies are inferred from the claim text.