Multiplex transmission system for vehicle

• US 5,408,227 A
• Filed: 06/10/1994
• Issued: 04/18/1995
• Est. Priority Date: 05/21/1990
• Status: Expired due to Term

• Current Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Original Assignee: Nippondenso Co., Ltd. (DENSO Corporation)
• Inventors: Kobayashi, Kenji, Isobe, Toshiaki, Uehara, Shigeru, Hirabayashi, Yuuzi
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): ZIMMERMAN, BRIAN A
• Application Number:
  US08/258,591
• Time in Patent Office: 312 Days
• Field of Search: 340/825.06, 340/825.50, 307/9.1, 307/10.1, 370/85.1, 370/85.7
• US Class Current: 340/3.1
• CPC Class Codes: B60R 16/0315 using multiplexing techniques multiplexing for transmission of signals G08C15/00; multiplexing for electrical communication in general H04J
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 2012/40273 the transportation system being a vehicle
• CPC Class Codes: Y10S 370/908 Local area network

Abstract

A multiplex transmission system for a vehicle is constructed such that signals are given and received via a communication line between a plurality of peripheral stations and a central station. The plurality of peripheral stations are arranged at various places such as a door system, an engine system and the like. Each of the peripheral stations is constructed such that an input signal from the plurality of working members (a door lock, a power window and the like) is sent to the central station via the communication line. A control signal from the central station is input via the communication line 5 by the peripheral stations to output to the plurality of working members. Depending on the bit unit form of the control signal working members are actuated. The central station processes data sent by the peripheral stations to generate the control signal.

Claims

1. A communication system for a vehicle in which signals are given and received via a communication medium between a plurality of peripheral stations and a central station in the vehicle, said plurality of peripheral stations being positioned at various places in the vehicle,

each of said peripheral stations comprising:

inputting means having inputs, said inputting means for inputting at each input an input signal output from a working member,

sending means for sending a sending signal including said input signals to said central station via said communication medium,

input/output means having outputs, each output connected to a working member and having an output position with respect to the other outputs, said input/output means for inputting a control signal from said central station via said communication medium and directly outputting on each output an output signal included in the control signal; and

said central station receiving said sending signals from said plurality of peripheral stations via said communication medium, generating said control signals

wherein each of said peripheral stations receiving a control signal, receives said control signal via said communication medium, and directly outputs said output signals within said control signal on said peripheral station'"'"'s corresponding outputs.

2. The communication system of claim 1, wherein each of said peripheral stations arranges said input signals within said information signal in a one-to-one arrangement corresponding to an input position of said inputs.

3. The communication system for a vehicle according to claim 1 wherein said peripheral station comprises:

repeatedly sending means for repeatedly sending said sending signal to said central station;

signal change detecting means for detecting a change in the input signal input with respect to said inputting means; and

sending interval changing means for repeatedly sending said sending signal for a certain period from said repeatedly sending means at a first sending time interval responding to the change detection of the input signal by means of the signal change detecting means and repeatedly sending said sending signal from said repeatedly sending means after passing the certain time at a second predetermined time interval which is longer than said first predetermined time interval.

4. The communication system for a vehicle according to claim 1 wherein

said plural peripheral stations are provided at each door of the vehicle to perform inputting for a switch provided at each door and perform control at the door such as door locking and the like.

5. The communication system for a vehicle according to claim 1 further comprising

a peripheral station for performing display working of a meter panel on the basis of said control signal from said central station.

6. The communication system of claim 1, wherein each of said peripheral stations arranges said input signals within said sending signal in a one-to-one arrangement corresponding to an input position of said inputs.

7. The communication system of claim 1, wherein said central station includes distinguishing means for distinguishing any one of said plurality of working members to be worked on the basis of said sending signal, and generating means for generating said control signals for each of said peripheral stations having input/output means connected to a working member to be worked based on said distinguishing so as to work the working members to be worked.

8. A communication system for a vehicle in which signals are given and received via a communication medium between a plurality of peripheral stations and a central station in the vehicle, said plurality of peripheral stations being positioned at various places in the vehicle,

each of said peripheral stations comprising:

inputting means for inputting input signals respectively output from a plurality of said working members;

outputting means having outputs, each output connected to a working member and having an output position with respect to the other outputs, the output means for directly outputting output signals to said working members; and

means for forming an information signal from said input signals, and sending said information signal to said central station via said communication medium, and

said central station receiving said information signals from said plurality peripheral stations via said communication medium converts said converting input information of said information signals into said control signals arranging, for each control signal, said output signals within said control signal in a one-to-one arrangement corresponding to said output positions of each of said outputs of a peripheral station which is to receive said control signal, and sending said control signals to said peripheral stations via said communication medium; and

wherein each of said peripheral stations receiving a control signal from said central station receives said control signal via said communication medium, and directly outputs said output signals within said control signal to said working members via said outputting means.

9. The communication system for a vehicle according to claim 8 wherein

said plural peripheral stations are provided at each door of the vehicle to perform inputting for a switch provided at each door and perform control at the door such as door locking and the like.

10. The communication system for a vehicle according to claim 8 further comprising

a peripheral station for performing display working of a meter panel on the basis of said control signal from said central station.

11. The communication system for a vehicle according to claim 8 wherein said peripheral station comprises:

repeatedly sending means for repeatedly sending said sending signal to said central station;

signal change detecting means for detecting a change in the input signal input with respect to said inputting means; and

sending interval changing means for repeatedly sending said sending signal for a certain period from said repeatedly sending means at a first sending time interval responding to the change detection of the input signal by means of the signal change detecting means and repeatedly sending said sending signal from said repeatedly sending means after passing the certain time at a second predetermined time interval which is longer than said first predetermined time interval.

12. The communication system of claim 8, wherein said central station includes distinguishing means for distinguishing any one of said plurality of working members to be worked on the basis to input information possessed by such information signal, and generating means for generating said control signals for each of said peripheral stations having outputting means connected to a working member to be worked based on said distinguishing so as to work the working members to be worked.

13. A communication system for a vehicle in which signals are transmitted and received across a communication medium, comprising:

control station means for receiving information message signals via said communication medium, for generating control message signals based on said information message signals, and for outputting said control message signals via said communication medium, said control message signals including control signals;

a plurality of peripheral station means for receiving said control message signals, for directly outputting said control signals to working members to control said working members, for generating said information message signals based on inputs signals from at least one of said working members, and for outputting said information message signals to said control station means via said communication medium; and

wherein

said control station means sends said control message signals via said communication medium to said plurality of peripheral station means.

14. The communication system of claim 13, wherein

said control station means includes,

judgment means for judging from which peripheral station an information message signal was output, and outputting the judgement as a judgement result, and

data conversion means for converting an information signal included in said information message signal into an output position and generating said control signal based on said output position and said judgement result;

and

each peripheral station means includes,

input means for inputting said input signals, and output means for outputting said control signals.

15. The communication system of claim 14, wherein

said input means has a plurality of inputs, each input receiving an input signal;

and

said output means includes an output corresponding to each bit in said control signal, and each output corresponds in a one to one manner to each input of said input means.

16. The communication system of claim 14, wherein said input means receives input signals from working members and sensors monitoring working members.

17. The communication system for a vehicle according to claim 13 wherein at least one of said peripheral station means is provided at a door of the vehicle to input an input signal from a switch provided at the door and to control locking of the door.

18. The communication system for a vehicle according to claim 13 wherein at least one peripheral station means controls a display of a meter panel based on said control signals.

19. The communication system of claim 13, wherein at least one of said peripheral station means includes:

a plurality of inputs, each input receiving an input signal; and

a plurality of outputs connected to an associated working member, each output corresponding to each bit in said control signal, and each output corresponding in a one to one manner to each input of said input means.

20. The communication system of claim 19, wherein at least one of said peripheral station includes:

output means for repeatedly outputting said information message signal at a predetermined interval;

signal change detecting means for detecting a change in said input signals; and

output interval changing means for setting said predetermined interval to a first sending time interval for a predetermined period and setting said predetermined interval to a second sending time interval when said predetermined period expires, said second sending time interval being longer than said first sending time interval.

21. The communication system of claim 13, wherein said control station means distinguishes any one of said plurality of working members to be worked on the basis of said sending signal, and generates said control signals for each of said peripheral stations having input/output means connected to a working member to be worked based on said distinguishing so as to work the working members to be worked.

22. The communication system of claim 13, wherein said control station means includes judgement means for judging which of the working members are to be worked based on said information message signals, and said control station means generates control message signals for each of said plurality of peripheral station means controlling working members to be worked.

23. The communication system of claim 13, wherein said control station means includes judgement means for judging which of said plurality of peripheral station means to send control message signals to based on said received information message signals.