Automobile remote-control system
First Claim
1. In an automobile remote control system in which a preset code is transmitted from a remote transmitter, said code is received by a receiver installed in an automobile, and an actuator is operated in accordance with said code received by said receiver,the improvement comprising:
- said transmitter being provided with a carrier oscillating circuit for oscillating a carrier with a predetermined frequency, a power source for supplying an operating voltage to said carrier oscillating circuit, and a data generating circuit for turning said operating voltage to said carrier oscillating circuit ON and OFF selectively to transmit a code signal composed of a leader pulse signal which is ON for a predetermined leader time period and, subsequently, a series of data pulse signals during a predetermined data time period representing said preset code, wherein said data pulse signals from said transmitter have a uniform pulse width and are spaced apart either by a first data time period to indicate a binary "1" or a different, second data time period to indicate a binary "0";
said receiver being connected to an antenna installed in the automobile to receive said code signal, and having a receiving circuit, an operating circuit for operating said receiving circuit to receive the data pulse signals of said code signal received by the antenna, and a processing circuit for processing the received data pulse signals into binary information in accordance with said first and second data time periods and providing an output to the actuator in accordance with said code represented by said binary information.
1 Assignment
0 Petitions
Accused Products
Abstract
An automobile remote-control system is disclosed. This system is characterized such that: a transmitter includes a carrier oscillating circuit for oscillating a carrier with a frequency higher than a radio broadcasting frequency band or a telephone transmitting-and-receiving frequency band; an operation voltage of this carrier oscillating circuit is turned ON/OFF by a drive control circuit; the carrier oscillating circuit is turned ON for a preset period prior to the transmission of the code thereby to transmit a leader pulse signal; the carrier oscillating circuit is subsequently turned ON in a pulse-like configuration at an interval corresponding to the code thereby to transmit a code pulse signal; a receiver receives the signal from the transmitter through a radio receiving antenna or a telephone transmitting-and-receiving antenna; the receiver is kept in an operation-state by a periodic operation control circuit at a cycle shorter than a continuance time of the leader pulse signal; when the leader pulse signal is detected by a detecting circuit, the receiver is held in the operation-state by an operation holding circuit; and the code pulse signal is converted into a code in accordance with a pulse interval by a code converting circuit.
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Citations
4 Claims
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1. In an automobile remote control system in which a preset code is transmitted from a remote transmitter, said code is received by a receiver installed in an automobile, and an actuator is operated in accordance with said code received by said receiver,
the improvement comprising: -
said transmitter being provided with a carrier oscillating circuit for oscillating a carrier with a predetermined frequency, a power source for supplying an operating voltage to said carrier oscillating circuit, and a data generating circuit for turning said operating voltage to said carrier oscillating circuit ON and OFF selectively to transmit a code signal composed of a leader pulse signal which is ON for a predetermined leader time period and, subsequently, a series of data pulse signals during a predetermined data time period representing said preset code, wherein said data pulse signals from said transmitter have a uniform pulse width and are spaced apart either by a first data time period to indicate a binary "1" or a different, second data time period to indicate a binary "0"; said receiver being connected to an antenna installed in the automobile to receive said code signal, and having a receiving circuit, an operating circuit for operating said receiving circuit to receive the data pulse signals of said code signal received by the antenna, and a processing circuit for processing the received data pulse signals into binary information in accordance with said first and second data time periods and providing an output to the actuator in accordance with said code represented by said binary information. - View Dependent Claims (2, 3, 4)
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Specification