Automobile multiple communication system operable under low power consumption
First Claim
1. A multiplex communication system used in an automobile, comprising:
- a parent station having at least judging means for judging whether or not a present communication mode of said multiplex communication system corresponds to one of a normal communication mode and a low-power-consumption mode;
at least one child station including;
detection means for detecting that a supply of power to said child station is instantaneously interrupted, thereby producing a detection signal, andcompulsorily condition changing means for compulsorily changing a present operation condition of said child station into a low-power-consumption operation condition in response to said detection signal;
a communication line for mutually connecting said parent station and said child station;
means for changing the present operation condition of said child station into the normal communication mode;
whereby when said judging means judges that the present communication mode of the multiplex communication system corresponds to said normal communication mode, said judging means sets operation conditions of said child station and said parent station to normal operation conditions so as to perform a communication between said child station and said parent station, andwhen said judging means judges that the present communication mode of the multiplex communication system corresponds to said low-power-consumption communication mode, said judging means transmits to said child station, an instruction for changing the present operation condition of said child station into the low-power-consumption operation condition, thereby bringing both of said child station and said parent station into the low-power-consumption operations in addition to said compulsorily condition changing operation by said compulsorily condition changing means.
1 Assignment
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Accused Products
Abstract
A multiplex communication system for an automobile which achieves low-power-consumption operation of a plurality of child stations. The system includes a parent station having a judging element to judge whether a communication mode of the system corresponds to one of a normal communication mode and a low-power-consumption mode; at least a child station having a detection unit for detecting that the supply of power to the child station has commenced to produce a power-supply detection signal, and a compulsory condition changing unit for changing a present operation condition of the child station to a low-power-consumption state in response to the power-supply detection signal; and a communication line for connecting the parent station and the child station. In the disclosed embodiment, the judging unit judges that the present communication mode corresponds to the normal communication mode and sets operation conditions of the child station and the parent station to normal operation conditions so as to perform a communication between the child station and the parent station. Alternatively, the judging unit judges that the present communication mode corresponds to the low-power-consumption communication mode and sets operation conditions of the child station to a low-power-consumption operation condition.
11 Citations
14 Claims
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1. A multiplex communication system used in an automobile, comprising:
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a parent station having at least judging means for judging whether or not a present communication mode of said multiplex communication system corresponds to one of a normal communication mode and a low-power-consumption mode; at least one child station including; detection means for detecting that a supply of power to said child station is instantaneously interrupted, thereby producing a detection signal, and compulsorily condition changing means for compulsorily changing a present operation condition of said child station into a low-power-consumption operation condition in response to said detection signal; a communication line for mutually connecting said parent station and said child station; means for changing the present operation condition of said child station into the normal communication mode; whereby when said judging means judges that the present communication mode of the multiplex communication system corresponds to said normal communication mode, said judging means sets operation conditions of said child station and said parent station to normal operation conditions so as to perform a communication between said child station and said parent station, and when said judging means judges that the present communication mode of the multiplex communication system corresponds to said low-power-consumption communication mode, said judging means transmits to said child station, an instruction for changing the present operation condition of said child station into the low-power-consumption operation condition, thereby bringing both of said child station and said parent station into the low-power-consumption operations in addition to said compulsorily condition changing operation by said compulsorily condition changing means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A multiplex communication system used in an automobile, comprising:
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a parent station having at least judging means for judging whether or not a present communication mode of said multiplex communication system corresponds to one of a normal communication mode and a low-power-consumption mode; at least one child station including; detection means for detecting that a supply of power to said child station is briefly interrupted and thereafter recovered, thereby producing a detection signal, and compulsorily condition changing means for compulsorily changing a present operation condition of said child station into a low-power-consumption operation condition in response to said detection signal; a communication line for mutually connecting said parent station and said child station; a switch provided for operating said child station; and means connected for changing the present operation condition of said child station into the normal communication mode; whereby when said judging means judges that the present communication mode of the multiplex communication system corresponds to said normal communication mode, said judging means sets operation conditions of said child station and said parent station to normal operation conditions so as to perform a communication between said child station and said parent station, and when said judging means judges that the present communication mode of the multiplex communication system corresponds to said low-power-consumption communication mode, said judging means transmits to said child station, an instruction for changing the present operation condition of said child station into the low-power-consumption operation condition, thereby bringing both of said child station and said parent station into the low-power-consumption operations in addition to said compulsorily condition changing operation by said compulsorily condition changing means. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification