Power line communication system
First Claim
Patent Images
1. A vehicular power line communication (PLC) system comprising:
- a loop-formed twisted pair wire at which end a core is connected;
a master configured to use the twisted pair wire as a power line and a communication line and configured to output a high-frequency signal to the twisted pair wire to transmit power and a signal; and
a slave including a looped aperture antenna configured to receive high-frequency power of the twisted pair wire through electromagnetic induction coupling of an electromagnetic field occurring at the twisted pair wire in accordance with an applied current of the twisted pair wire and a received power measurement portion that monitors received power received at the aperture antenna,wherein the aperture antenna includes an aperture region facing an aperture region between a plurality of twisted portions of the twisted pair wire,wherein the master and the slave are configured to operate in an adjustment mode that adjusts power line communication at a communication rate lower than a normal rate before starting normal power line communication,wherein when the master outputs the high-frequency signal, the slave is configured to receive the high-frequency signal and allows the received power measurement portion to measure a reception power level,wherein the communication system is configured such that when a measurement result is greater than or equal to a predetermined level, normal power line communication starts between the master and the slave, andwherein the slave further includes a superposition/separation circuit configured to receive the high-frequency signal from the master, and to separate the received high-frequency signal into a power signal and a communication data signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicular power line communication system includes a looped twisted pair wire, a master, and a slave. The master outputs a high-frequency signal to the twisted pair wire to transmit power and a signal. The slave includes a looped aperture antenna that receives high-frequency power of the twisted pair wire and a received power measurement portion that monitors received power received at the aperture antenna. The aperture antenna includes an aperture region facing an aperture region between twisted portions of the twisted pair wire.
-
Citations
11 Claims
-
1. A vehicular power line communication (PLC) system comprising:
-
a loop-formed twisted pair wire at which end a core is connected; a master configured to use the twisted pair wire as a power line and a communication line and configured to output a high-frequency signal to the twisted pair wire to transmit power and a signal; and a slave including a looped aperture antenna configured to receive high-frequency power of the twisted pair wire through electromagnetic induction coupling of an electromagnetic field occurring at the twisted pair wire in accordance with an applied current of the twisted pair wire and a received power measurement portion that monitors received power received at the aperture antenna, wherein the aperture antenna includes an aperture region facing an aperture region between a plurality of twisted portions of the twisted pair wire, wherein the master and the slave are configured to operate in an adjustment mode that adjusts power line communication at a communication rate lower than a normal rate before starting normal power line communication, wherein when the master outputs the high-frequency signal, the slave is configured to receive the high-frequency signal and allows the received power measurement portion to measure a reception power level, wherein the communication system is configured such that when a measurement result is greater than or equal to a predetermined level, normal power line communication starts between the master and the slave, and wherein the slave further includes a superposition/separation circuit configured to receive the high-frequency signal from the master, and to separate the received high-frequency signal into a power signal and a communication data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A vehicular power line communication (PLC) system comprising:
-
a loop coil; a master configured to use the loop coil as a power line and a communication line and outputs a high-frequency signal to the loop coil to transmit power and a signal; and a slave including a looped aperture antenna configured to receive high-frequency power of the loop coil through electromagnetic induction coupling of an electromagnetic field occurring at the loop coil in accordance with an applied current of the loop coil and a received power measurement portion that monitors received power received at the aperture antenna, wherein the loop coil is configured so that an aperture region facing an aperture region of the aperture antenna is larger than other aperture regions, wherein the master and the slave are configured to operate in an adjustment mode that adjusts power line communication at a communication rate lower than a normal rate before starting normal power line communication, wherein when the master outputs the high-frequency signal, the slave is configured to receive the high-frequency signal and allows the received power measurement portion to measure a reception power level, wherein the communication system is configured such that when a measurement result is greater than or equal to a predetermined level, normal power line communication starts between the master and the slave, and wherein the slave further includes a superposition/separation circuit configured to receive the high-frequency signal from the master, and to separate the received high-frequency signal into a power signal and a communication data signal. - View Dependent Claims (11)
-
Specification