Alert system for prevention of collisions with low visibility mobile road hazards
First Claim
1. An system, comprising:
- a transmitting unit that includes a motion detection circuit, a microprocessor, and a radio frequency modulator,wherein the motion detection circuit is configured to direct a motion detected signal to the microprocessor upon the apparatus being moved in a predetermined manner,the microprocessor is configured to generate an encoded message that includes an identification code denoting a type of transmitter, andthe radio frequency modulator is configured to modulate the encoded message at a transmitting frequency; and
a receiving unit that includes a radio frequency receiver, a microprocessor, and an output,wherein the radio frequency receiver receives the encoded message at the transmitted frequency,the microprocessor is configured to determine the identification code, andthe output is configured to alert a user of the presence of the transmitting unit.
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Accused Products
Abstract
A presence detection system comprising, among other things, a radio transmitter and receiver is described herein. The transmitter includes a motion detection circuit, a microprocessor, and a radio frequency modulator. The motion detection circuit is configured to direct a motion detected signal to the microprocessor upon the transmitter being moved in a predetermined manner. The microprocessor is configured to generate an encoded message that includes a preamble denoting a beginning of the encoded message, an identification code denoting a type of transmitter, and a check message (such as a checksum) containing information about content of the encoded message. Finally, the radio frequency modulator is configured to modulate the encoded message at a transmitting frequency.
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Citations
35 Claims
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1. An system, comprising:
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a transmitting unit that includes a motion detection circuit, a microprocessor, and a radio frequency modulator, wherein the motion detection circuit is configured to direct a motion detected signal to the microprocessor upon the apparatus being moved in a predetermined manner, the microprocessor is configured to generate an encoded message that includes an identification code denoting a type of transmitter, and the radio frequency modulator is configured to modulate the encoded message at a transmitting frequency; and a receiving unit that includes a radio frequency receiver, a microprocessor, and an output, wherein the radio frequency receiver receives the encoded message at the transmitted frequency, the microprocessor is configured to determine the identification code, and the output is configured to alert a user of the presence of the transmitting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A transmitting unit, comprising:
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a motion detection circuit; a microprocessor; and a radio frequency modulator; wherein the motion detection circuit is configured to direct a motion detected signal to the microprocessor upon the transmitting unit being moved in a predetermined manner, the microprocessor is configured to generate an encoded message that includes an identification code denoting a type of transmitter responsive to the motion detected signal, and the radio frequency modulator is configured to modulate the encoded message at a transmitting frequency; and the microprocessor is configured to cease generating the encoded message upon the motion detection circuit not generating a motion detected signal for a predetermined time. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A receiving unit, comprising:
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a radio frequency receiver; a microprocessor; and an output, the microprocessor is configured to cause the radio frequency receiver to transition from a power conservation state to an operational power state according to a predetermined schedule, the radio frequency receiver is configured to receive the encoded message at a transmitted frequency, the microprocessor is further configured to determine an identification code within the encoded message, and the output is configured to alert a user of the presence of a transmitting unit corresponding to the predetermined identification code. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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Specification