JPH06233350A - Multiplex communication equipment for vehicle - Google Patents

Abstract

PURPOSE:To improve the productivity and also to reduce the labor and time needed for the stock control by dealing with all types of specifications of vehicles with the same program through a slave station which is common to all specifications and a slave station set to the specific specifications respectively. CONSTITUTION:The slave stations 100A, 200-500 and 600A are connected to a master station 20. The door lock actuators, the door lock sensor switches, etc., connected to the station 100A are decentralized to the stations 200-500 and 600A. Meanwhile a vehicle speed sensor, a key insertion sensor switch, etc., are connected to the station 100A. A communication line LL is set between the station 20 and those slave stations so that the communication is possible among those stations. The station 20 consists of a microcomputer, a ROM, a RAM, and other peripheral parts and carries out a control program to decide the specifications of a vehicle. At the same time, each slave station includes a control part to drive a terminal equipment. In such a constitution, many pieces of operation information and the drive information on the terminal equipments can be transmitted via a small number of communication channels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle multiplex communication apparatus for transmitting operation information of a large number of operation sections and driving information of a terminal device through a small number of communication lines.

[0002]

2. Description of the Related Art There is known a vehicle multiplex communication device for transmitting operation information of a large number of operation parts and driving information of a terminal device through a small number of communication lines (for example, Japanese Patent Laid-Open No. Hei 3-136496).
(See Japanese Patent Publication).

A conventional vehicle multiplex communication system is shown in FIG.
As shown in FIG. 4, the slave stations 100 to 600 for each part of the vehicle.
Is installed and the parent station 10 and each of the child stations 100 to 600 are connected via a communication line LL. Operating members and terminal devices in the vicinity are connected to each slave station.

In FIG. 14, a master station 10 installed in a center console of a vehicle has slave stations 100, 200, 300, 400, 500, 600 via multiplex communication lines LL.
Are connected.

The slave station 100 is installed near the instrument panel and detects a vehicle speed by a vehicle speed sensor 10.
1, a key insertion detection switch 102 that is turned on when the key is inserted, a key switch 103 that is turned on when the key is in the ON position, a hazard lamp 104, a room lamp 105, a door that is turned on when the driver's door is opened A switch 106, a door switch 107 that is turned on when the passenger seat door is opened, a door switch 108 that is turned on when the rear seat right door is opened, a door switch 109 that is turned on when the rear seat left door is opened, and the like are connected. It

The slave station 200 is installed in the driver's seat door, and a centralized door lock switch 201 for locking all the doors of the vehicle at the same time, a door lock actuator 202 for locking the driver's seat door, and turning on when the driver's seat door is locked. A door lock detection switch 203, a door switch 204 that is turned on when the driver's seat door is opened, and the like are connected. The slave station 300 is installed on the passenger door, and has a door lock actuator 301 that locks the passenger door, a door lock detection switch 302 that turns on when the passenger door is locked,
Door switch 303 that turns on when the passenger door is opened
Etc. are connected.

The slave station 400 is installed at the rear right door and locks the rear right door.
A door lock detection switch 402 and the like which are turned on when the rear seat right door is locked are connected. The slave station 500 is installed in the rear left door, and is connected with a door lock actuator 501 that locks the rear left door, a door lock detection switch 502 that is turned on when the rear left door is locked, and the like.

The slave station 600 is installed in the vicinity of the rear parcel, and is connected with a keyless remote control device 601 for locking and unlocking the door and opening the trunk lid without key operation, and a trunk open actuator 602 for opening the trunk lid.

A unique address is set in each of the slave stations 100 to 600, and the master station 10 communicates with a specific slave station by using this address. Each slave station 100-600
Collects the operation information of the operation members, the information of the sensors, etc., and transmits them to the master station 10. The master station 10 determines the driving information of the terminal device based on the information, and transmits the driving information to the corresponding slave stations 100 to 600. Each child station 100
To 600 output the drive information received from the master station 10 to the terminal device to drive the terminal device.

By the way, the specifications of the vehicle differ depending on the destination, grade, etc., and the master station needs to select the control contents in order to operate the terminal device according to the specifications. For example, a vehicle for domestic use has a vehicle-speed centralized door lock that automatically locks all doors when the vehicle reaches a predetermined speed, but a vehicle for North America does not perform such control. Therefore, the master station selects and executes the vehicle speed interlocking centralized door lock control only for vehicles for domestic specifications, and does not select this control for vehicles for North American specifications.

The specifications of the vehicle are set by installing a plurality of resistors in the electronic unit of the master station and combining the resistors. The master station detects the combination of those resistors, determines the vehicle specifications, and selects the control content according to the specifications of the determination result. In addition, the RO that stores the control content
There is also one in which M is prepared for each specification and the control content is selected by exchanging the ROM according to the specification.

[0012]

However, in the conventional vehicle multiplex communication device, a dedicated master station is prepared for each vehicle specification and replaced according to the specification, or the ROM in the master station is replaced according to the specification. There is a problem that the replacement is required, productivity is lowered, and the inventory of the master station and the ROM is increased to increase the management labor.

An object of the present invention is to install the same master station regardless of the specifications of the vehicle, determine the specifications of the vehicle according to the installation status of the slave stations, and select control contents.

[0014]

The present invention will be described with reference to FIG. 1 which is a claim correspondence diagram. The present invention includes a slave station 901 commonly installed for all specifications of a vehicle.
Slave station 902 installed only for specific specifications of the vehicle
And a master station 903 for communicating information with these slave stations 901 and 902, the master station 9 of the vehicle multiplex communication device.
In 03, a storage unit 951 for storing control contents corresponding to all specifications of the vehicle and a slave station 902 installed only for at least specific specifications of the vehicle are called, and the specifications of the vehicle are determined depending on whether or not there is a response. Specification discriminating means 9 for discriminating
52, a control content selection unit 953 for selecting the control content stored in the storage unit 951 according to the specification determined by the specification determination unit 952, and the control content selection unit 9
The communication means 954 for transmitting information to the corresponding slave station based on the control content selected in 53 is provided, thereby achieving the above object.

[0015]

The slave station is divided into a slave station 901 which is common to all specifications of the vehicle and a slave station 902 which corresponds to a specific specification of the vehicle, and is installed in the vehicle. The vehicle specifications can be determined by calling the slave station 902 and checking for the presence or absence of those responses. Select the control contents according to the specifications determined in this way,
Information is transmitted to the corresponding slave station based on the selected control content.

[0016]

FIG. 2 is a block diagram showing the structure of an embodiment. It should be noted that the same reference numerals are given to the same devices as those shown in FIG. 14, and the description thereof will be omitted. In this embodiment, a hazard lamp, a room lamp, and a door switch of each door, which are conventionally connected to the slave station 100, are connected to the slave station 600, and the slave station 100 is 100A and the slave station 600 is 600A. Further, in this case, the slave stations 100A to 500 are commonly installed for all specifications, and the slave station 600A is provided only for domestic specifications and is not installed for North American specifications. As shown in FIG. 3, the master station 20 is composed of a communication unit 21 and a control unit 22, and each slave station 100A, 200, 30.
As shown in FIG. 4, 0, 400, 500, 600A are communication units 110, 210, 310, 410, 510, respectively.
610 and control units 120, 220, 320, 420, 52
It consists of 0,620.

As shown in FIG. 5A, the communication unit 21 of the master station 20 has a slave station 100A, a slave station 200, a slave station 300, a slave station 400, a slave station 500, a slave station 600A, a slave station 100A ,.
・ Communication is performed via the communication units 110 to 610 of the respective slave stations in this order. A communication frame in communication with each of the slave stations 100A to 600A is configured as shown in FIG. Figure 5
Although a communication frame with the slave station 600A is shown in (b), the same applies to communication frames with other slave stations. Here, the communication with the slave station 600A will be described as an example. First, all the slave stations 100A to 6A from the master station 20 via the communication line LL.
A communication frame 801 including an address and data is transmitted to 00A. The address of the slave station 600A is set in the address of the communication frame 801, and the data includes drive information of the terminal device connected to the slave station 600A. COM in the communication frame 801 is a command indicating communication from the master station to the slave station.

All the slave stations 100A to 600A connected to the master station 20 via the communication line LL have their respective communication units 110.
In steps 610 to 610, the communication frame 801 from the master station 20 is received, and if the address matches the address of the self station, the communication frame 802 including the address and data is immediately transmitted to the master station 20. The address of the slave station 600A is set to the address of the communication frame 802, and the data includes information on operation members and sensors connected to the slave station 600A. Note that C in this communication frame 802
OM is a command indicating communication from the child station to the parent station.

The control unit 22 of the master station 20 has a microcomputer (hereinafter referred to as CPU) 22 as shown in FIG.
a, ROM 22b, RAM 22c, and other peripheral components, and executes a control program described later to determine vehicle specifications and select and execute control contents according to the determination result specifications. Control units 120 to 62 of the slave stations 100A to 600A
Reference numeral 0 denotes a drive circuit of the terminal device, which drives each terminal device and inputs signals from operating members and sensors.

FIG. 6 shows a slave station setting byte stored in the RAM 22c, and FIG. 7 shows a slave station setting program. The CPU 22a of the master station 20 is connected to each of the slave stations in FIG.
The slave station setting program shown in is executed, and the presence or absence of each slave station is stored in the slave station setting byte shown in FIG. Step S of FIG.
In 1, the slave station address is initialized. here,
The address is set to the address of the slave station 600A. In a succeeding step S2, a communication frame 801 including the address and data of the communication partner slave station 600A is transmitted to all the slave stations 100A to 600A via the communication line LL. At this time, there is no particular need to send data, so all the data bits of the communication frame 801 are set to 0. In step S3, it is determined whether or not there is a response from the slave station 600A, that is, whether or not the communication frame 802 has been received from the slave station 600A. If received, the process proceeds to step S6, and if not received, the process proceeds to step S4. In step S4, it is determined whether or not a predetermined time has elapsed. When the predetermined time has elapsed, the process proceeds to step S5, and if not, the process returns to step S3. Here, the predetermined time is the communication time T assigned to each slave station as shown in FIG. In step S5, since there is no response from the slave station 600A within the predetermined time, 0 is set to bit 0 of the slave station setting byte indicating the presence / absence of the slave station 600A. On the other hand, in step S6, since there is a response from the slave station 600A, 1 is set in bit 0. Next, in step S7, it is determined whether or not all the slave stations installed for the specific specifications have been called. When the calling of all the slave stations is completed, the execution of the program is ended. Proceed to S8. In step S8, the address is changed to the address of the next slave station, and then in step S8.
Returning to step 2, the above process is executed for the next slave station. In this case, the failure of the entire multiplex communication device is detected by checking not only the presence / absence of a slave station installed for a specific specification but also the presence / absence of a slave station installed for a common specification. You can also

FIG. 8 shows a destination byte of the vehicle stored in the RAM 22c, and FIG. 9 shows a destination setting program. When the setting of the slave station setting byte shown in FIG. 6 is completed, the CPU 22a of the master station 20 executes the destination setting program shown in FIG. 9, and stores the destination in the destination byte shown in FIG. In this embodiment, the destinations are domestic and North America. All the devices shown in FIG. 2 are installed in the domestic vehicle, and the slave station 600A, the keyless remote control device 601, and the door switches 605 to 608 are not installed in the vehicle for North America. In the case of North America, the trunk open actuator 602, the hazard lamp 603, and the room lamp 604 are connected to their respective manual switches and manually operated by an occupant.

In step S11 of FIG. 9, the slave station 60
Bit 5 of the slave station setting byte indicating the presence or absence of 0A is checked, and if bit 5 is 0, that is, slave station 600A is not installed, the process proceeds to step S12, and if slave station 600A is installed, the process proceeds to step S13. In step S12, since the child station 600A is not installed, it is determined that it is for North America,
Set 02H in the destination byte. On the other hand, step S
In No. 13, since the slave station 600A is installed, it is determined to be domestic, and 01H is set in the destination byte.

10 to 12 are flowcharts showing an example of a main program executed by the CPU 22a of the master station 20. The operation of the embodiment will be described with reference to these flowcharts. The CPU 22a executes the slave station setting program shown in FIG. 7 to detect the presence or absence of each slave station, and further executes the destination setting program shown in FIG. 9 to set the destination based on the presence or absence of the slave station, The execution of the main program shown in FIGS. 10 to 12 is started. As described above, the master station 2
0 indicates each slave station 100A to 600A in the order shown in FIG.
It communicates with each other, receives the operation information of the operation member and the information of the sensors, and transmits the drive information of the terminal device to each of the slave stations 100A to 600A according to the information. Details of such communication between the master station 20 and the slave stations 100A to 600A are disclosed in the above-mentioned Japanese Patent Laid-Open No. 3-136496 and the like, and since they are not directly related to the present invention, detailed description thereof will be omitted below. .

In step S21, it is determined whether or not all the doors are locked by the centralized door lock switch 201, and when all the doors are locked, step S2 is performed.
2. If not, skip step S22. In step S22, a door lock command is transmitted from the communication unit 21 of the master station 20 to each of the slave stations 200 to 500 via the communication line LL when communicating with each of the slave stations 200 to 500. Each slave station 200 to 50 that received this door lock command
The communication units 210 to 510 of 0 are the respective control units 220.
To 520, the control signals 220 to 5 are transmitted.
20 is each door lock actuator 202, 3
01, 401, 501 are driven to lock each door.
Next, in step S23, the centralized door lock switch 201
It is determined whether or not all doors are unlocked, and when all doors are unlocked, step S2
4. If not, skip step S24. In step S24, a door unlock command is transmitted to each of the slave stations 200 to 500 to unlock all the doors. In this way, when the central door lock switch 201 locks or unlocks all the doors,
All doors are locked or unlocked regardless of domestic specifications or North American specifications.

In step S25, it is determined from the destination byte whether the specification is for domestic use. If the specification is for domestic use, the process proceeds to step S26, and if it is for North America, the process proceeds to step S28. Step S for domestic specifications
At 26, the door lock detection switch 203 on the driver's side determines whether the driver's door is locked or unlocked, and if locked or unlocked, step S27.
If not, step S27 is skipped. In step S27, a door lock command or a door unlock command is transmitted to the slave stations 200 to 500 to lock or unlock each door. In the case of North America, the door lock detection switch 20 on the driver side is selected in step S28.
3 or the passenger side door lock detection switch 302 determines whether or not the driver's seat door or the passenger seat door is locked. If either door is locked, the process proceeds to step S29, and if not, step S29. Skip. In step S29, a door lock command is transmitted to the slave stations 200 to 500 to lock each door. In this way, the domestic version locks or unlocks all doors depending on whether the driver side door is locked or unlocked, whereas the North American version only locks or unlocks the driver side door or the passenger side door. Lock all doors.

Next, in step S31 of FIG. 11, it is determined whether or not all the doors are locked with the key inserted. The key insertion detection switch 102 detects the key insertion state, and the centralized door lock switch 201
After all the doors are locked by, the driver door switch 204 and the passenger door switch 303 detect that the driver door and the passenger door are closed,
In step S32, it is determined whether the specifications are for domestic use,
If the specification is for domestic use, the process proceeds to step S33, and if it is for North America, the process proceeds to step S34. In the case of domestic specifications, the hazard lamp 6 is sent to the slave station 600 in step S33.
Send a blinking command of 03 to warn the key containment state,
For North American specifications, the door 200-
A door unlock command is transmitted to 500 to unlock each door. In this way, when the key is enclosed, the warning for the domestic specification is issued by blinking the hazard lamp 603, and the specification for North America unlocks all the doors.

In step S35, it is determined whether the specification is for domestic use. If the specification is for domestic use, the following process is performed. If the specification is for North America, the process returns to step S21 in FIG. In step S36, it is determined whether or not the key switch 103 is in the ON position and the vehicle speed sensor 101 has detected a vehicle speed of 24 km / h or higher.
If it is denied, the step S37 is skipped.
In step S37, a door lock command is transmitted to the slave stations 200 to 500 to lock each door. That is, the vehicle-speed centralized door lock control is performed in the domestic version, but not in the North American version.

In step S41 of FIG. 12, it is determined whether the keyless remote controller 601 has received a door lock or unlock signal. When the keyless remote controller locks or unlocks the door, the process proceeds to step S42. If not, step S42 is skipped. In step S42, a door lock command or a door unlock command is transmitted to the slave stations 200 to 500 to lock or unlock each door. Further step S
43, the room lamp 6 with the keyless remote control device 601
It is determined whether or not the ON or OFF signal of 04 is received, and if it is received, the process proceeds to step S44, and if not, step S44 is skipped. In step S44, a lighting or extinguishing command is transmitted to the slave station 600 to turn on or off the room lamp 604. Continuing step S
At 45, the keyless remote controller 601 determines whether or not the trunk open signal is received. If the trunk open signal is received, the process proceeds to step S46. If not, step S46 is skipped. In step S46, a trunk open command is transmitted to the slave station 600, and the trunk open actuator 602 opens the trunk lid. Then, it returns to step S21 of FIG. In this way, the specifications for domestic use perform the above control with a keyless remote controller,
In the North American specifications, the slave station 600 is not installed, so the above control is not performed.

In this way, the slave stations 100A to 500 common to the domestic specifications and the North American specifications and the slave station 600A dedicated to the domestic specifications are installed, and the master station 20 allows the slaves dedicated to the domestic specifications to be installed. The station 600A is called, the specification of the vehicle is discriminated by the presence or absence of those responses, the control content is selected according to the discriminated specification, and the information is transmitted to the corresponding slave station. There is no need to replace the station and ROM, all specifications can be handled with the same program, productivity is improved, and the same parent station and ROM for all vehicle specifications can be stocked.
Inventory management is reduced.

In the above-mentioned embodiments, the domestic specifications and the North American specifications have been described as examples, but the destination is not limited to the above-mentioned embodiments. For example, if there are three types of specifications for domestic, North American, and European, instead of the slave station 600 for the European specifications, the slave station 6 is used except for the address.
The same slave station 700 as 00A is installed. Prior to communication, the master station is a slave station 600, 700 provided for a specific specification.
And if the slave station 600 is installed, it is determined to be domestic, if the slave station 700 is installed, it is determined to be Europe, and if both the slave station 600 and the slave station 700 are not installed, it is determined to be North America and the destination byte To set. Then, the execution of the main program is started, and for example, as shown in FIG. 13, in step S51, it is determined whether or not the specification is for domestic use. If the specification is for domestic use, the process proceeds to step S52, and if not, the process proceeds to step S53. In step S52, the keyless remote control and the vehicle-speed centralized door lock control described above are performed. In step S53, it is determined whether it is for Europe,
If it is for Europe, the process proceeds to step S54, and if it is not for Europe, it is determined to be for North America, and step S54 is skipped. In step S54, keyless remote control is performed.
For North America, keyless remote control and vehicle-speed centralized door lock control are not performed.

Further, in the above-mentioned embodiment, the specification change depending on the destination has been described as an example, but the present invention can be applied to all the specification changes such as the specification change depending on the grade.

Furthermore, the number and arrangement of the slave stations and the types of operation members and terminal devices connected to each slave station are not limited to those in the above embodiment.

In the configuration of the above embodiment, the slave station 100
A to 500 are slave stations commonly installed for all specifications of the vehicle, a slave station 600A is a slave station installed for a specific specification of the vehicle, a master station 20 is a master station, and a microcomputer. 22a and the slave station setting program shown in FIG. 7 executed therein and the destination setting program shown in FIG. 9 serve as specification determining means, the ROM 22b serves as storage means, the microcomputer 22a and FIGS.
The main program shown in (1) constitutes the control content selection means, and the communication section 21 constitutes the communication means.

[0034]

As described above, according to the present invention, a common slave station for all specifications of a vehicle and a slave station for a specific specification of the vehicle are installed, and at least for a specific specification of the vehicle. Since the slave station is called and the vehicle specifications are discriminated based on the presence or absence of those responses, and the control contents are selected according to the discriminated specifications, the master station or ROM
The same program can be used for all specifications without the need for exchanging, and productivity can be improved, and the same master station and ROM can be stocked for all specifications of the vehicle. The labor is reduced.

[Brief description of drawings]

FIG. 1 is a complaint correspondence diagram.

FIG. 2 is a block diagram showing the configuration of an embodiment.

FIG. 3 is a block diagram showing a configuration of a master station.

FIG. 4 is a block diagram showing the configuration of a slave station.

FIG. 5 is a diagram showing a communication sequence between a master station and a slave station and a communication frame.

FIG. 6 is a diagram showing a slave station setting byte.

FIG. 7 is a flowchart showing a slave station setting program.

FIG. 8 is a diagram showing a destination setting byte.

FIG. 9 is a flowchart showing a destination setting program.

FIG. 10 is a flowchart showing a main program.

11 is a flowchart showing the continuation of the main program shown in FIG.

12 is a flowchart showing the continuation of the main program shown in FIG.

FIG. 13 is a flowchart showing a modification of the main program.

FIG. 14 is a block diagram showing a configuration of a conventional vehicle multiplex communication device.

[Explanation of symbols]

20,903 Master station 21,110,210,310,410,510,61
0 communication unit 22, 120, 220, 320, 420, 520, 62
0 control unit 22a microcomputer (CPU) 22b ROM 22c RAM 100A, 200, 300, 400, 500, 600
A, 901, 902 Slave station 101 Vehicle speed sensor 102 Key insertion detection switch 103 Key switch 201 Centralized door lock switch 202, 301, 401, 501 Door lock actuator 203, 302, 402, 502 Door lock detection switch 204, 303, 605, 606, 607, 608 Door switch 601 Keyless remote control device 602 Trunk open actuator 603 Hazard lamp 604 Room lamp LL communication line 801, 802 Communication frame 951 Storage means 952 Specification determination means 953 Control content selection means 954 Communication means

Claims (1)

[Claims] 1. A slave station commonly installed for all specifications of a vehicle, a slave station installed only for a specific specification of a vehicle, and communication of information between these slave stations. A vehicle multi-communication device having a master station for executing, storing means for storing control contents corresponding to all specifications of a vehicle, and calling a slave station installed only for at least a specific specification of the vehicle. A specification discriminating means for discriminating the vehicle specifications based on the presence or absence of these responses; and a control content selecting means for selecting the control content stored in the storage means according to the specifications discriminated by the specification discriminating means, A vehicle multiplex communication apparatus comprising: a communication means for transmitting information to a corresponding slave station based on the control content selected by the control content selection means, and the master station.