JP3095116B2 - Alarm device and anti-theft device in multiplex communication system for vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a plurality of electronic units (multiplex communication units) to which switches, loads, etc. are connected, each having a multiplex communication function, at various places inside a vehicle (in a vehicle), The units are interconnected by a multiplex bus line, and control data is transmitted and received between the electronic units via the multiplex bus line, thereby controlling input of a signal from a switch or the like and output of a signal to a load. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular multiplex communication system, and more particularly to an alarm device and an anti-theft device in a vehicular multiplex communication system that generates an alarm for preventing a vehicle abnormality, especially a theft, by detecting an abnormality with respect to an operation mechanism of the vehicle. .

[0002]

2. Description of the Related Art In a token passing system in which a token (transmission right) is sequentially circulated between a plurality of nodes (corresponding to the above-described electronic unit) and cyclic communication is performed, only a node holding a token accesses a multiplex bus line. (Transmission), so that transmission opportunities can be equally given to each node, and communication between nodes can be performed reliably and at high speed.

[0003] Such a token passing method is suitably applied to a multiplex communication system for a vehicle because of the above-mentioned features. An example of a vehicle multiplex communication system employing the token passing system will be described with reference to the drawings. As shown in FIG. 7, the vehicle multiplex communication system includes a first node (electronic unit) N ₁ ,
Node (electronic unit) N ₂ and third node (electronic unit) N _3, and each of these nodes (electronic unit)
And a multiplex bus line BL interconnecting them.
Loads such as various switches, sensors, and motors (all not shown) are connected to the nodes N _{1 to} N ₃ . Further, the second node horn as a mechanism for generating an alarm in N ₂ (not shown) is connected.

[0004] In the multiplex communication system, for example, as shown in FIG. 8, first, second first node N ₁ transmits data to the multiple bus lines BL to the token address 2 and thereby receives the token Node N of 2
₂ then sets the token address to 3 and sets the multiple bus line B
Send data to L. By the third node N ₃ that has received the token transmits the data to the multiple bus lines BL to the token address 1, the node N ₁ which has received the token then sends the data.

By repeatedly performing such an operation, token addresses 1 to 5 are provided on the multiplex bus line BL.
No. 3 data will be repeatedly present in order. As described above, each of the nodes N _{1 to} N ₃ switches the transmission target node so as to transmit the token address of the next node to which the token is passed.

[0006]

[SUMMARY OF THE INVENTION In a multiplex communication system for a vehicle described above, or if abnormal operation abnormality occurs to the connected various switches or the load to the first to third nodes N ₁ to N ₃ Is done,
It was configured to perform an alarm by the abnormality or abnormal operation the second node N ₂ to the connected horn detects a.

[0007] For example, when an abnormality is detected or abnormal operation of the connected various switches or the load to the first node N _1, the node N ₁ of the first the alarm to the second node N ₂ Send instructions. The alarm instruction second node N ₂ that has received the performs an alarm operation such as by sending an operation signal to the horn to generate an alarm sound. Then, the warning operation, warning termination instruction is executed continuously until they are sent from the first node N ₁ to the second node N _2.

[0008] Therefore, the conventional vehicle multiplex communication system.
In the system, each node N₁Or N _ThreeCommunication differences between
When the normal condition occurs, each node N₁Or N_ThreeInterconnect
If a disconnection occurs in the multiplex bus line BL, or
Node N₁Or N_ThreeIf there is a malfunction in yourself,
A communication error has occurred and data cannot be sent or received normally.
I will.

[0009] When such a communication error occurs during the alarm operation can not send an alarm cancel instruction to the second node N _2, a second node N ₂ is executing the alarm operation Will continue to do so. In this case, even if the cause of the alarm is canceled, the alarm operation is not canceled and the alarm operation is continuously performed. In general, such an alarm operation is an operation performed to notify surrounding people of the abnormality, and thus the object is achieved by executing the alarm operation for a certain period.

Therefore, the execution of the alarm operation for a long period of time not only disturbs the surroundings but also causes the battery in the vehicle to be dead. Accordingly, the present invention has been made in view of the conventional problems described above, and when a communication error occurs during an alarm operation, an alarm operation in a vehicular multiplex communication system that automatically stops the alarm operation after performing an alarm operation for a predetermined period. Another object is to provide a device and an anti-theft device, and to provide a device with improved usability.

[0011]

To achieve the above-mentioned object, an alarm device in a vehicular multiplex communication system according to the present invention comprises a plurality of multiplexes having a multiplex communication function as shown in the basic configuration diagram of FIG. Communication unit (10, 2
0, 30, 40) are provided at various places in the vehicle, and the multiplex communication units (10, 20, 30, 40) are interconnected by multiplex bus lines (BL) to constitute a multiplex communication system. Communication units (10, 20,
30, 40) at least one multiplex communication unit (1
0) based on the alarm command from other multiplex communication units (3
0) In the alarm device in the multiplex communication system for a vehicle configured to execute the alarm operation according to (0), the other multiplex communication unit (30) is configured to execute the alarm operation when the alarm operation is performed.
An alarm operation stopping means (30a1) for forcibly stopping an alarm operation when an alarm cancel instruction is not transmitted from the multiplex communication unit (10) that has generated the alarm instruction.

The other multiplex communication unit (30)
Is a multiplex communication unit (10) that has generated said alarm command.
A timer means (30f) for starting a timekeeping operation from the time of receiving an alarm command from
1) is characterized in that the alarm operation is forcibly stopped when the alarm canceling command is not sent out at the time when the timing unit (30f) has counted a predetermined time.

Further, as shown in the basic configuration diagram of FIG. 1, the anti-theft device in the multiplex communication system for a vehicle according to the present invention includes the above-described alarm device and an operation detection device for detecting an operation on an operation mechanism of the vehicle. Means (10a1)
Wherein the alarm device is configured to execute an alarm operation when an abnormal operation is recognized based on an operation signal from the operation detecting means.

Further, the operation detecting means (10a1) comprises:
When the detected operation state satisfies a predetermined determination condition, the state shifts to the alert state, and the alarm device is configured to execute the alarm operation only when the operation detection unit (10a1) is in the alert state. Features.

Further, the operation detecting means (10a1) comprises:
A lock detecting means (10a2) for detecting a locked state of the vehicle and outputting the detected information as lock information;
When the vehicle enters a predetermined locked state based on the locking information from 2), the vehicle shifts to the alert state.

In the above configuration, at least one multiplex communication unit (10) in the multiplex communication system sends an alarm command to the multiplex bus line (BL) when detecting abnormality or abnormal operation of a connected switch or load. I do. The transmitted alarm command is received by the multiplex communication unit (30) to which the load performing the alarm operation is connected,
This causes the multiplex communication unit (30) to start an alarm operation. Then, the alarm operation stopping means (30a1) provided in the multiplex communication unit (30) monitors the alarm release command from the multiplex communication unit (10) that has sent the alarm command, and outputs the alarm release command from the multiplex communication unit (10). When it is determined that the alarm release command has not been sent, the alarm operation by the multiplex communication unit (30) is forcibly stopped.

That is, since the multiplex communication unit itself for executing the alarm operation is provided with means for forcibly stopping the alarm operation being performed by itself, a communication error occurs during the alarm operation, and the reception of the alarm release command is not performed. Even in the case where the operation becomes impossible, the alarm operation can be stopped.

Further, a timer means (30f) provided in the multiplex communication unit (30) for executing the alarm operation starts counting from the time when the alarm command from the multiplex communication unit (10) is received. Then, the alarm operation stopping means (3)
0a1) is the multiplex communication unit (1
0) and the time measured by the timer means (30d) are monitored. If the alarm cancellation command is not sent within the specified time, it is determined that some abnormality has occurred and multiplex communication is performed. The alarm operation executed by the unit (30) is forcibly stopped.

That is, the multiplex communication unit itself for executing the alarm operation is provided with means for measuring a period during which the alarm operation is being executed, and the alarm operation is canceled even if the execution period of the alarm operation exceeds a predetermined period. If it was not, it was configured to forcibly stop its own alarm operation,
When a communication error occurs during the alarm operation, the alarm operation can be automatically stopped after executing the alarm operation for a predetermined period.

The operation detecting means (10a1) monitors an operation on an operation mechanism of the vehicle, for example, an operation on a mechanism arranged inside the vehicle, a locking operation on a door or a trunk, and the like. Further, the operation detecting means (10a
In 1), when the monitored operation state satisfies a predetermined determination condition, the state shifts to a warning state that may require an alarm. Then, the alarm device executes the alarm operation only when the operation detecting means (10a1) is in the alert state.

That is, since the normal state and the alert state are distinguished from each other and the alarm operation is executed only in the alert state, unnecessary alarm operation is not executed. Further, when the locked state of the vehicle is monitored, it is detected that the locked state has become a predetermined state, more specifically, a locked state in which there is a high possibility that the inside of the vehicle will be unmanned, and the predetermined locked state is detected. Is configured to shift to the alert state, so that the alarm operation is not erroneously performed in the normal state.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a block diagram showing a specific example of an in-vehicle multiplex communication system to which the alarm device and the antitheft device in the multiplex communication system for a vehicle according to the present invention are applied. This specific example shows an example in which the present invention is applied to a multiplex communication system of a vehicle body.
Reference numeral 10 denotes a first electronic unit, 20 denotes a second electronic unit, 30 denotes a third electronic unit, and 40 denotes a fourth electronic unit. Each of these electronic units 10 to 40 functions as a multiplex communication unit having a multiplex communication function, and is interconnected by a multiplex bus line BL. In the illustrated configuration, the multiplex bus line BL
Although four electronic units are interconnected with each other, other electronic units can be connected in the same manner.

The first electronic unit 10 is an electronic unit mainly connected to switches and loads disposed in the vehicle, and includes a first switch unit 11 configured as an operation switch group disposed in the vehicle, and a door. Remote switch unit 12 configured as a remote control switch mechanism (keyless entry mechanism) for locking / unlocking the remote control without key operation, and a first real unit configured as a lock mechanism for a door on the driver's seat side. The load 13 and a second actual load 14 configured as a lock mechanism for a door on the other seat side except the driver's seat are connected to each other.

The switches constituting the first switch section 11 include the following switches. That is, the first switch unit 11 is provided with an accessory, that is, an accessory (AC
C), an ACC switch for controlling the supply of power to the driver, an ignition switch for controlling the start / stop of the engine, a driver door switch for detecting the open / closed state of a driver side door, a rear door for the driver side (rear side of the driver side). Door switch for detecting the open / closed state of the door), a driver's door lock switch that is arranged in the vehicle and functions as an operation switch for locking the driver's rear door, and a plate that covers and protects the front engine room of the vehicle A hood switch that detects the open / closed state of a hood, which is a member, a trunk switch that detects an open / closed state of a trunk cover that covers a rear trunk room of a vehicle, and a key cylinder provided in the trunk cover, and which is locked / unlocked by a key operation ( Lock release), and the open / close state of the trunk cover and trunk cover That has a trunk switch (both not shown).

The remote switch section 12 is configured as a receiver for receiving a code signal from a transmitter built in the ignition key, for example, and based on the code signal, an all lock control signal for locking all doors, A driver's seat unlock control signal for unlocking only the driver's seat side door and an other seat unlock control signal for unlocking other doors except the driver's seat side door are transmitted.

The lock mechanism for the first actual load 13, that is, the door on the driver's seat side, locks the door on the driver's seat side in response to a lock control signal and an unlock control signal from the first electronic unit 10. Or unlocked. Further, the lock mechanism for the second actual load 14, that is, the door on the other seat side,
In response to the lock control signal and the unlock control signal from the electronic unit 10, the door on the other seat side is locked or unlocked.

The second electronic unit 20 is an electronic unit for mainly controlling the locked state of the door on the driver's seat side. The second electronic unit 20 includes a second switch unit 21 configured as a switch group for locking the door on the driver's seat side. It is connected. The second switch section 21 is provided in a driver's door lock switch which is disposed in the vehicle and functions as an operation switch for locking a driver's seat side door, and is provided on a key cylinder arranged on an outer surface of the driver's seat side door, Driver's door key lock switch that detects lock by key operation, also provided on the key cylinder,
It has a driver's door key unlock switch that detects unlocking by key operation (all are not shown).

The third electronic unit 30 is an electronic unit for mainly controlling the locked state of the door on the passenger seat side, and includes a third switch unit 31 configured as a switch group for locking the door on the passenger seat side. A third actual load 32 configured as a mechanism that operates for an alarm is connected.

The third switch unit 31 includes a passenger door switch for detecting the open / closed state of the door on the passenger side, and a rear door for detecting the open / closed state of a rear door on the passenger side (rear door on the passenger side). A switch, a passenger door lock switch that is arranged in the vehicle and functions as an operation switch for locking the door on the passenger side, and a rear door lock that is also disposed in the vehicle and functions as an operation switch for locking the rear door on the passenger side. Switch, key lock switch provided on the key cylinder arranged on the outer side of the door on the passenger seat side, which detects lock by key operation. Passenger seat also provided on the key cylinder, which detects unlock by key operation. It has a key unlock switch (both not shown).

The third actual load 32, that is, the mechanism operated for alarming, includes a horn relay for controlling operation / non-operation of a horn for generating an alarm sound, and a headlight relay for controlling on / off of a headlight. And a starter relay for controlling the operation / non-operation of a starter for starting the engine (both are not shown).

The fourth electronic unit 40 is an electronic unit that mainly controls various indicators provided on an instrument panel of the vehicle, and is connected to a fourth actual load 41 configured as various indicators. That is, the fourth actual load 41 is configured as a warning lamp for displaying various warning information.

Then, the above-mentioned first electronic unit 10
Has the configuration shown in FIG. 3 in more detail. That is, the first electronic unit 10 has a built-in ROM 10b storing a control program and a RAM 10c having a data area and a work area, and has a CPU 10a that operates according to the control program. And this C
PU10a is an output port O _B for sending data to the multiple bus lines BL, and an input port I _B for inputting data from the multiple bus lines BL, which are multiple bus lines BL via respective buffer amplifiers 10d and 10e It is connected to the.

[0033] In addition, CPU10a the input port I _A1 ~
I _An and output ports O _{A1 to} O _An.
A1 ~I The _An, remote switch unit 12 as a first switch unit 11 and a keyless entry system as operation switches arranged in the vehicle is connected to the output port O _A1 ~ O _An
Has a first actual load 13 as a driver side door lock mechanism.
In addition, the second actual load 14 as the other-seat side door lock mechanism is connected.

The second electronic unit 20 and the fourth electronic unit 40 have the same basic configuration as the first electronic unit 10 described above. That is, the difference between the first electronic unit 10 and the second electronic unit 20 and the fourth electronic unit 40 is as shown in FIG.
Input ports I _{A1 to} I _An and output ports O _{A1 to} O
Since only the switch unit connected to _An and the type of the actual load are different, the first electronic unit 10
Will be replaced with the description of the second electronic unit 20 and the fourth electronic unit 40.

Further, the third electronic unit 30 has a configuration shown in FIG. 4 in more detail. That is, the third electronic unit 30 has the R
R having OM 30b, data area and work area
A built-in AM 30c and an alarm timer 30d for measuring an elapsed time of an alarm operation, and operating according to a control program;
U30a. The alarm timer 30d is configured to output an alarm release command (a signal indicating an “OFF” state of alarm start transmission data described later) input via the multiplex communication line BL.
Function as counter means for forcibly terminating the alarm operation when no input is made due to a communication error or the like.

The CPU 30a is connected to the multiplex bus line BL similarly to the first electronic unit 10 described above.
An output port O _B for sending data to, and an input port I _B for inputting data from the multiple bus lines BL, which are connected to the multiplex bus line BL via the respective buffer amplifiers 30e and 30f.

[0037] In addition, CPU30a the input port I _A1 ~
I _An and output ports O _{A1 to} O _A3.
The _A1 ~I _An, is connected to the third switch section 31 configured as a passenger-side door lock switch group, the output port O _A1 ~ O _A3, the third actual load as mechanisms for alarm 32 Is connected. That is, the output port O _A1 is connected horn relay 32a constituting the third actual load 32, the output headlight relay 32b is connected to the port O _A2, and the starter relay 32c is connected to the output port O _A3 I have.

The horn relay 32a functions as a switch for the horn (not shown), and the horn sounds when the horn relay 32a is in the connected state. Similarly, the headlight relay 32b functions as a switch for a headlight (not shown), and the headlight is turned on when the headlight relay 32b is in a connected state. The starter relay 32c is connected to a starter magnet switch (not shown) (a main part of the starter) and enables or disables starting of the engine by the starter.

In the multiplex communication system configured as described above, the communication operation is performed by the same token passing method as that described in the related art. That is,
The first electronic unit 10 transmits data to the multiplex bus line BL using the token address as the second electronic unit 20, and the second electronic unit 20 that has received the token transmits the token address to the third electronic unit 30. , The third electronic unit 30 transmits data with the token address as the fourth electronic unit 40, and the fourth electronic unit 40 transmits the token address with the first electronic unit. The data is transmitted as the unit 10. The electronic unit 10 to be transmitted by repeatedly performing such operations
To 40 are switched.

Next, the operation of the specific example having the above-described configuration will be described with reference to a flowchart showing processing performed by the CPU of each electronic unit according to a control program. In the operation described below, it is assumed that data is transmitted and received between the electronic units by the token passing method described above.

In this specific example, first, an alert condition acquisition process is performed in step S110 of FIG. This alert condition acquisition process is a process of acquiring the operation state of the operation mechanism of the vehicle. More specifically, in this alert condition acquisition processing, the key is not used, that is, the lock state is acquired by a manual lock operation, the lock state is acquired by a lock operation using a key, and the lock is obtained by using a keyless entry mechanism (remote switch unit 12). Acquire the lock state by operation.

In the following step S111, it is determined whether or not the alert condition is satisfied based on the lock state acquired in step S110. That is, in step S111, when the next state is detected, it is determined that the condition is satisfied.

The first state is a state where the door on the driver's seat or the door on the passenger's seat side is opened (the first switch unit 11).
Is detected based on the output from the driver's seat door switch or the passenger's seat door switch of the third switch unit 31).
The door is locked by operating the driver's door lock switch or the passenger's door lock switch (detected based on the output from the driver's door lock switch of the second switch section 21 or the passenger's door lock switch of the third switch section 31). After that, all the doors are locked in a predetermined time (for example, within 0.5 seconds) (the rear door lock switch of the first switch unit 11, the driver door lock switch of the second switch unit 21, and the third switch). (Detected based on the output from the door lock switch on the passenger seat and the door lock switch after the passenger seat of the unit 31). (Determination of Locked State by Manual Locking Operation) The predetermined time in this determination is measured by the RAM of each electronic unit or a timer (not shown) (the same applies to the following description).

In the second state, a door lock operation is performed by key operation from outside the vehicle (detected based on the output from the driver's door key lock switch of the second switch section 21 and the output of the passenger's door key lock switch of the third switch section 31). ,
Thereafter, within a predetermined time (for example, within 0.5 seconds), all the doors are locked (the door lock switch after the driver's seat of the first electronic unit 10, the driver's door lock switch of the second switch unit 21, and the third switch unit 31). (Detected based on the output from the door lock switch on the passenger seat and the door lock switch after the passenger seat), it is determined that the condition is satisfied. (Judgment of lock state by lock operation using key)

In the third state, the doors are locked by remote control (by the remote switch unit 12), and then all doors are locked within a predetermined time (for example, within 0.5 seconds) (the above-mentioned door lock switch after the driver's seat). (Detected based on the output from the driver's door lock switch, the passenger's door lock switch, and the rear door lock switch), it is determined that the condition is satisfied. (Judgment of lock state by lock operation using keyless entry mechanism)

In this step S111, when any of the above-mentioned first to third states is detected, it is determined that the vigilance condition is satisfied (Y), and the routine proceeds to step S112, where the first to third states are detected. When none of the states is detected, it is determined that the alert condition is not satisfied (N), and the alert condition is acquired in the next operation cycle (RTS). Then, in step S112, in response to satisfying the alert condition, the alert state is set, and the process proceeds to step S120. In addition. When a predetermined time (for example, 20 seconds) elapses from the alert set state, the state automatically shifts from the alert set state to the alert state.

In step S120, an alert release condition acquisition process is performed. The alert release condition acquisition process of step S120 is a process of acquiring the operation status of the operation mechanism of the vehicle when the alert status is set in step S112. The operation state of the door or trunk lock mechanism is obtained, and the lock release operation state is obtained by remote control.

In the following step S121, it is determined whether or not the alert release condition is satisfied based on the operation state obtained in step S120. That is, in step S121, when the next state is detected, it is determined that the condition is satisfied.

As a first state, an ACC switch or an ignition switch is turned on by a key (first state).
(Detected based on outputs from the ACC switch and the ignition switch of the switch unit 11), it is determined that the condition is satisfied. As the second state, step S12
When the alert set state is set in 2 and the door on the driver's seat side or the door on the passenger seat side is unlocked (unlocked) within a predetermined time (for example, within 20 seconds) immediately after the shift to this state, that is, before the shift to the alert state. (The driver's door lock switch of the second switch section 21 or the third switch section 31
Detected based on the output from the passenger door lock switch)
It is determined that the condition is satisfied.

As a third state, when the door is unlocked from outside the vehicle by key operation (second switch 21
Driver's door key lock switch, third switch section 31
(Detected based on the output from the passenger seat door key lock switch). As a fourth state, the locked state of the trunk is released using the key (the first switch unit 1).
1 is detected by the trunk key switch 1), and the trunk cover is opened within a predetermined time (for example, within 2 seconds) after the lock state is released (the first switch unit 1).
1 based on the output from the trunk switch). As a fifth state, when the door is unlocked by remote control (by the remote switch unit 12) (detected based on the driver's seat unlock control signal from the remote switch unit 12 and the other seat unlock control signal), a condition is set. It is determined to be satisfied.

As a sixth state, when the driver's door or the passenger's seat side door is open, the driver's door lock switch or the passenger's seat door lock switch is operated to lock the door. When the door is closed (detected based on the output from the driver's door switch of the first switch section 11 and the output of the passenger's door switch of the third switch section 31), the door is closed within a predetermined time (for example, within 2 seconds). ), The condition is satisfied when the door lock is released and the door is unlocked (detected based on the output from the driver's door lock switch of the second switch section 21 or the passenger's door lock switch of the third switch section 31). Is determined.

As a seventh state, when the driver's seat door or the passenger's seat side door is opened, the driver's door lock switch or the passenger's seat door lock switch is operated to lock the door. When the door is closed (detected based on the output from the driver's door switch of the first switch unit 11 and the output of the passenger's door switch of the third switch unit 31), the door is locked and the door is closed (incompletely closed state). [When the output from the switch on the basis of the output from the driver's door switch of the first switch unit 11 or the passenger's seat door switch of the third switch unit 31 shifts from the "open" state to the "closed" state, When the state changes from “closed” to “open” within the time (eg, within 2 seconds)]
Is determined to satisfy the condition.

In this step S121, if any of the above-mentioned first to seventh states is detected, it is determined that the alert release condition is satisfied (Y), and the flow shifts to step S141 to proceed to the first to seventh states. If none of the above conditions is detected, it is determined that the alert release condition is not satisfied (N), and the routine goes to Step S130.

In step S130, an alarm condition acquisition process is performed. The alarm condition acquisition process is a process of acquiring an operation state of the operation mechanism of the vehicle when determining whether an alarm is actually generated. More specifically, in this alarm condition acquisition processing, the open / closed state of a door, a trunk cover, or a hood is acquired.

In a succeeding step S131, it is determined whether or not the alarm condition is satisfied based on the operation state information obtained in the step S130. That is, in this step S131, it is determined that the alarm condition is satisfied when the next state is detected.

In the first state, when a predetermined time (for example, 2 seconds) has elapsed from the point of transition to the alert state, any one of the doors is opened (the driver's door switch of the first switch unit 11 and the driving state). It is determined that the condition is satisfied (the detection is based on the outputs from the rear door switch, the passenger door switch of the third switch unit 31 and the rear door switch).

As the second state, when the trunk cover is kept closed for a period of time (for example, two seconds) after the transition to the alert state (the first switch unit 11).
(Detected on the basis of the output from the trunk switch), all the doors are closed and the locked state is continued (the driver's door switch and the rear door switch of the first switch unit 11 and the assistant of the third switch unit 31). Seat door switch and rear-seat door switch, driver's door lock switch of the first switch section 11, driver's door lock switch of the second switch section 21, passenger's seat door lock switch of the third switch section 31, and rear passenger's seat It is determined that the condition is satisfied when the trunk cover is opened (detected based on the output from the door lock switch) and the trunk cover is opened (detected based on the output from the trunk switch).

As a third state, when the hood covering the engine room of the vehicle is kept closed for a period after a predetermined time (for example, 2 seconds) has passed since the transition to the alert state (the state of the first switch unit 11). At the time of detection based on the output from the hood switch), all the doors are closed and the locked state is maintained (the driver's door switch and the driver's door switch, the passenger's door switch and the passenger's rear door switch, the driver's seat When the hood is open (detected based on the output from the above hood switch) and when the hood is open (detected based on the output from the hood switch) It is determined that the condition is satisfied.

In this step S131, if any of the above-mentioned first to third states is detected, it is determined that the alarm condition is satisfied (Y), and the routine goes to step S140, where the first to third states are detected. If none of the states is detected, it is determined that the alarm condition is not satisfied (N), and step S141 is performed.
Move to

In step S140, in response to the alarm condition being satisfied, the electronic unit whose alarm condition is not satisfied (in this specific example, the first electronic unit 1
0 or the third electronic unit 30) turns on (generates) the alarm start transmission data indicating that an alarm is to be generated.
To In step S141, in response to the alarm condition being unsatisfied, the target electronic unit (the electronic unit 10 or 30) turns off (non-occurs) the alarm start transmission data. Then, in these steps S140 or S141, the alarm start transmission data is
After the N state or the OFF state, step S150
Move to

In step S150, an alarm execution process in the third electronic unit 30 is performed. This alarm execution processing is specifically performed according to the flowchart of FIG. Hereinafter, description will be made with reference to the flowchart of FIG.

In the alarm execution processing, first, at step S2
At 10, it is determined whether an alarm has started. This step S
The determination process of 210 is performed based on alarm start transmission data from the target electronic unit, that is, the electronic unit itself (the third electronic unit 30) or the first electronic unit 10,
When the alarm start transmission data from at least one of the electronic units has changed from the “OFF” state to the “ON” state, it is determined to be a start (Y) and the process proceeds to step S211. In other cases, ie, the “ON” state or “ If the "OFF" state continues, or from the "ON" state to "OFF"
If the state has changed, it is determined to be non-start (N), and the flow shifts to step S213.

In step S211, a start flag indicating the start of an alarm is set in the work area of the RAM 30c (for example, from "0" to "1"). In the subsequent step S212, the alarm timer 30d corresponds to an arbitrary alarm end period. Set the count value to perform. This count value is given as a specified time (for example, 3 minutes) for forcibly terminating the alarm operation when the alarm cancel command is not input due to a communication error or the like. When the process in step S211 ends, the process proceeds to step S220.

On the other hand, if it is determined in step S210 that the start is not started (N), the flow shifts to step S213, where the alarm start transmission data is in the "ON" state or the "OFF" state. It is determined whether there is. Then, the alarm start transmission data is in the “ON” state (Y)
If so, the previous state is maintained and step S220 is performed.
And the alarm start transmission data is "OFF" (N)
If so, the flow shifts to step S214 to set the above-mentioned start flag to OFF (for example, “0”), and then shifts to step S220.

In step S220, the start flag is set to "O
The determination of whether the state is "N" or "OFF"
This is performed by referring to the work area of M30c. If the start flag is in the "ON" state (Y) in step S220, it is determined that the alarm operation is to be performed (started or continued), and the process proceeds to step S230. When the start flag is in the “OFF” state (N), the alarm operation is not executed (the execution is unnecessary or stopped).
Then, the process proceeds to step S240.

In step S230, in response to the execution of the alarm operation, the count value of the alarm timer 30d, that is, the remaining period information until the end of the alarm is obtained. If the count value of the alarm timer 30d is greater than zero, that is, if the alarm period remains (N), the process proceeds to step S231.
After decrementing the count value of the alarm timer by (-1), an alarm operation is executed in step S232. If the count value of the alarm timer 30d is equal to or less than zero, that is, if the alarm period has ended (Y), it is determined that a communication error has occurred due to some factor, and step S2 is performed.
At 33, the start flag is changed to the "OFF" state, this alarm execution processing is ended (returned), and the routine goes to step S160 in the flowchart of FIG.

The alarm operation in step S232 will be described in more detail. In this alarm operation, the horn is transmitted by sending an intermittent drive command to the horn relay 32a and the headlight relay 32b constituting the third actual load 32. The sound is intermittently sounded and the headlight is turned on intermittently. At the same time, starter relay 32c
By driving the motor, the power supply to the starter magnet switch is cut off, and the engine cannot be started. Then, when such an alarm operation is executed, the alarm execution processing is terminated (returned).

On the other hand, if the start flag is in the "OFF" state (N) in step S220, the process proceeds to step S220.
The process proceeds to 240, where zero is set (forced OFF) as the count value of the alarm timer 30d. Then, in the following step S241, the above-described alarm operation (S232) is stopped. Then, when the alarm operation is stopped, the alarm execution processing ends (returns).

In step S160, which is executed following the above-described alarm execution process (S150), it is determined whether or not the alarm operation is stopped. This step S160
Is determined based on the state of the start flag described above,
If the start flag is in the “OFF” state, it is determined to be stopped (Y), and the process proceeds to step S170. (Note that the determination of the stop includes the non-execution of the process.) When the start flag is in the “ON” state, it is determined that the process is to be continued (N), and the process proceeds to the above-described step S120. Then, the processes after the alert release condition acquisition process of step S120 are executed again.

In step S170, if the warning operation is terminated or not executed, and the device is in the alert state, the alert state is released. And this step S17
A series of operations is terminated with 0, and the operations in the next cycle are executed by executing the processing from S110 again (RTS).

As is clear from the above description, in this specific example, it is first determined whether or not to shift to the alert state by monitoring the operating state of the operating mechanism arranged in the vehicle (steps S110 to S112). In this alert state, it is determined whether or not the alert condition release condition is satisfied (steps S120 and S121). If the alert condition release condition is not satisfied (N in step S121), an alarm is issued. It is determined whether or not it occurs (step S13)
0 to S141), an alarm execution process is performed based on this determination result (step S150).

As described above, the operation state of the operation mechanism disposed in the vehicle, the operation of the operation mechanism of the vehicle, such as the operation of the mechanism disposed inside the vehicle, the locking operation of the door or the trunk, and the like are monitored (basic of the present invention). The operation detection means 10a1 in the configuration), the normal state and the alert state are distinguished based on the monitoring result, and the alarm operation is executed only in the alert state.
Unnecessary alarm operation is not performed.

In the alarm execution process, it is determined that the alarm has started (step S210). If the alarm has started (Y in step S210), the alarm timer is set to a predetermined compulsory end time of the alarm (step S210). Step S21
2), an alarm operation is performed (step S232). With the execution of this alarm operation, the set time (count value) of the alarm timer is sequentially reduced (step S231).

When the alarm release condition is satisfied (Y in step S121), and when the alarm condition is not satisfied (N in step S131), the alarm operation is stopped by the normal processing operation (step S213). N, step S
If the alarm has not been stopped after the lapse of the above-mentioned forced termination time (Y in step S230), it is considered that a communication error has occurred due to some cause, and this alarm operation is forcibly performed. (Step S
233 → N in step S220 of next cycle → step S2
41, alarm operation stopping means 30 in the basic configuration of the present invention
a1).

As described above, the third multiplex communication unit 30 itself that performs the alarm operation is provided with the alarm timer 30d (corresponding to the clocking means 30f in the basic configuration of the present invention) that measures the period during which the alarm operation is being performed. If the alarm operation is not canceled even if the execution period of the alarm operation exceeds the predetermined period, the alarm operation being performed by itself is forcibly stopped, so that a communication error occurs during the alarm operation. When this occurs, it is possible to automatically stop the alarm operation after the alarm operation is performed for a predetermined period.

[0076]

As described above, according to the present invention,
The following effects are obtained. In other words, since the multiplex communication unit that performs the alarm operation itself has a means for forcibly stopping the alarm operation being performed by itself, a communication error occurs during the alarm operation, and it becomes impossible to receive the alarm release command. In this case, the alarm operation can be stopped.

Further, the multiplex communication unit itself for executing the alarm operation is provided with means for measuring a period during which the alarm operation is being executed, and the alarm operation is canceled even if the execution period of the alarm operation exceeds a predetermined period. If there is no alarm operation, the alarm operation that is being performed is forcibly stopped.If a communication error occurs during the alarm operation, the alarm operation is automatically performed after the alarm operation is performed for a predetermined period. It is possible to stop.

Further, since the normal state and the alert state are distinguished from each other and the alarm operation is executed only in the alert state, unnecessary alarm operation is not executed.

Further, the locked state of the vehicle is monitored, and it is detected that the locked state has become a predetermined state, more specifically, a locked state in which the inside of the vehicle is likely to be unmanned. Since it is configured to shift to the alert state when it is detected, it is possible to prevent an erroneous alarm operation from being performed in the normal state.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a basic configuration of the present invention.

FIG. 2 is a block diagram illustrating a specific example of an in-vehicle multiplex communication system to which the present invention is applied.

FIG. 3 is a block diagram illustrating a configuration of a first electronic unit.

FIG. 4 is a block diagram illustrating a configuration of a third electronic unit 30.

FIG. 5 is a flowchart illustrating an operation of a specific example.

FIG. 6 is a flowchart illustrating a warning execution process according to a specific example.

FIG. 7 is a diagram illustrating a configuration of a conventional device.

FIG. 8 is a diagram illustrating a procedure of the token passing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 1st electronic unit 10a CPU 10b ROM 10c RAM 11 1st switch part 12 Remote switch part 13 1st real load 14 2nd real load 20 2nd electronic unit 21 2nd switch part 30 3rd electronic unit 30a CPU 30b ROM 30c RAM 30d Alarm timer 31 Third switch unit 32 Third actual load 32a Horn relay 32b Headlight relay 32c Starter relay 40 Fourth electronic unit 41 Fourth actual load

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI G08B 25/10 G08B 25/10 Z (58) Investigated field (Int.Cl. ⁷ , DB name) B60R 25/00-25 / 10 B60R 16/02 G08B 13/00 G08B 25/10

Claims (5)

(57) [Claims] 1. A multiplex communication system is provided by providing a plurality of multiplex communication units having a multiplex communication function at various places in a vehicle and interconnecting the multiplex communication units by multiplex bus lines. An alarm device in a vehicular multiplex communication system configured to execute an alarm operation by another multiplex communication unit based on an alarm command from at least one multiplex communication unit; , When the alarm release command is not sent from the multiplex communication unit that generated the alarm command,
An alarm device in a vehicular multiplex communication system, comprising alarm operation stopping means for forcibly stopping an alarm operation. 2. The multiplex communication unit according to claim 2, wherein the multiplex communication unit includes a timer unit that starts a timer operation from a time point at which the alarm command is received from the multiplex communication unit that has generated the alarm command. 2. The alarm device according to claim 1, wherein the alarm operation is forcibly stopped when the alarm release command is not transmitted when the means measures a predetermined time. 3. The alarm device according to claim 1, further comprising: an operation detection unit configured to detect an operation on an operation mechanism of the vehicle, wherein the alarm unit receives an operation signal from the operation detection unit. An anti-theft device in a vehicular multiplex communication system, wherein an alarm operation is executed when an abnormal operation is recognized. 4. The operation detection means shifts to a warning state when the detected operation state satisfies a predetermined determination condition, and the alarm device performs an alarm operation only when the operation detection means is in a warning state. 4. The anti-theft device in a multiplex communication system for a vehicle according to claim 3, wherein the anti-theft device is configured to be executed. 5. The operation detecting means has a lock detecting means for detecting a locked state of the vehicle and outputting it as locking information, and when the vehicle is in a predetermined locked state based on the locking information from the locking detecting means. 5. The anti-theft device in a multiplex communication system for a vehicle according to claim 4, wherein the state shifts to the alert state.