JPH0632204A - Burglarproof device - Google Patents

Abstract

PURPOSE:To conduct control with high reliability while the harness is prevented from being thickened and complicated by periodically sending supervisory signals to sub-nodes connected to the respective sensors through a multi-communicating line when the main node is on alert, and giving a warning when no response signal is given from the sub-nodes. CONSTITUTION:A burglar preventing device comprises a front node 2 also serving as a main node, and a meter node 3, a door node 4 and a rear node which are taken as sub-nodes connected to various kinds of sensors for detecting the various kinds of a vehicle for preventing burglar, wherein the nodes are connected to each other by a multi-communicating line. The front node 2 covers the control related to the operation of the whole burglarproof device and transmits supervisory signals periodically to the respective nodes 3, 4, 5. If no ANC signal is given from one of the meter node 3, the door node 4 and the rear node 5 in response to the supervisory signal, the front node 2 takes it as abnormality and operates a warning buzzer and lights a warning lamp 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for a vehicle, which is controlled via multiple communication lines.

[0002]

2. Description of the Related Art An anti-theft device for an automobile has a warning system established when a driver finally locks a lock mechanism such as a door before leaving the vehicle, and thereafter, the door lock is released by a predetermined operation. If you enter the vehicle without
Alternatively, when a door, a trunk or the like is opened by a method other than a predetermined means, an alarm or the like is issued. An example of such an antitheft device is disclosed in, for example, Japanese Patent Laid-Open No. 63-269759. In the disclosed anti-theft device, the functionality of the anti-theft device is enhanced by partially releasing the warning system when a predetermined operation is performed.

[0003]

Such a conventional anti-theft device is provided with one central control unit, and a sensor and an alarm device are provided in each part of the vehicle and are connected to the control unit by wiring to perform control. ing. However, in such a control system, wiring for connecting each sensor and each device to the central control unit is required, so that the harness is enlarged,
There is a problem of causing complication. In order to solve such a problem, it has been proposed to control an electric component by using a multiplex communication system.

Under a multiplex communication system, different control signals are sent to a communication node which constitutes a device by a single communication line, and the node controls and operates a device or device under its control within a range based on the control signal. It is designed to let you. When configuring an anti-theft device using such a multiplex communication system, when some abnormality occurs in a constituent node or a communication state, proper control cannot be achieved and there is a concern that control reliability is impaired.

Therefore, an object of the present invention is to provide an antitheft device using a multiplex communication system capable of highly reliable control.

[0006]

In order to solve the above problems, the present invention is configured as follows. An anti-theft device according to the present invention includes a main node that performs anti-theft control, at least one sub node connected to various sensors that detect various states of a vehicle for anti-theft, and the main node and the sub node. And a multiplex communication line connected to enable multiplex communication, wherein the main node periodically transmits a monitoring signal to the subnode via the multiplex communication line when in a security system by the anti-theft control, from the subnode. When there is no response signal of the above, it is characterized in that it is configured to issue an alarm.

In the anti-theft device, the main node may take the anti-theft control system when an abnormality is detected in the communication state with the sub node before entering the anti-theft system. Characterized by being configured to be impossible. In this case, preferably, the driver is informed of the abnormality of the anti-theft device.

[0008]

According to the present invention, the anti-theft device is composed of a main node and a sub node, and the main node is designed to cover the control relating to the operation of the entire anti-theft device. To activate the alert system, whether to remove the alert system, whether there is an abnormality in the configuration node, multiplex communication line, etc., and if an abnormality occurs, an alarm is issued. Is controlled. Also, at least one sub-node is provided at a predetermined location of the vehicle, is connected to a door lock switch, a trunk switch, an ignition switch, etc., receives signals from these, and is transmitted to the main node via a multiplex communication line. Send,
It has the role of notifying the main node of the status of the jurisdiction.

The main node periodically transmits a supervisory signal to the sub node. When there is no response signal to this supervisory signal, that is, the ANC signal, it is determined that there is an abnormality in the subnode or its multiplex communication system, and an alarm is issued. For example, turn on the alarm lamp or turn off the alarm buzzer. If the anti-theft device is not in the alert system, no alarm will be generated, but even if there is no alert system, the main node periodically outputs the monitoring signal to the sub-node, so there is no abnormality in the sub-node or its multiplex communication system. Can be detected. When an abnormality is detected during the non-warning system, the driver cannot enter the warning system even if the driver tries to take the warning system. In this state, if the driver or the like operates the anti-theft device to take precautions, an abnormality is notified.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1, an anti-theft device 1 according to the present embodiment includes a front node 2 that also serves as a main node that performs anti-theft control, and a sub-node that is connected to various sensors that detect various states of a vehicle for anti-theft. Is provided with a meter node 3, a door node 4, and a rear node 5. The front node 2, the meter node 3, the door node 4, and the rear node 5 are connected by a multiplex communication line 6 so that these multiplex communication is possible.

Each of these nodes 2, 3, 4, and 5 is provided with a controller including a microcomputer and a multiplex communication module for interfacing with a multiplex communication line. Since the content is well known and does not constitute a part of the content of the present invention, detailed description thereof will be omitted. In front node 2,
A bonnet switch 7 is connected which closes and sends a signal when the bonnet is opened. Alternatively, a warning lamp 8 for displaying an alarm state is connected and is turned on by a signal from the front node 2. The front node 2 is designed to cover the control relating to the operation of the anti-theft device as a whole. For example, whether or not the anti-theft device should be activated to take a warning system and whether or not the warning system should be released. whether,
It is determined whether or not an abnormality has occurred in a constituent node, multiplex communication line, etc., and when an abnormality has occurred, control such as issuing an alarm is performed. The meter node 3 is provided near the instrument panel of the vehicle, and is connected to a keyless entry switch 9 that closes when there is a keyless entry and an ignition switch 10 that closes when the ignition is operated. Deanode 4
Are provided to detect the state of the front door, and a key cylinder switch 11 that generates a signal when the front door is operated by a key, and a lock link switch 1 that generates a signal indicating whether or not the door is locked.
Connected to 2.

Further, the rear node 5 includes a door switch 13 for generating a door opening / closing signal, a trunk switch 14 for generating a trunk opening / closing signal, and a trunk key cylinder switch 15 for generating a signal corresponding to the operation of the trunk key cylinder. It is connected to the. The control of the anti-theft device of this example will be described with reference to FIG.

The front node 2 repeatedly executes the antitheft control program. In this program, the front node 2 first determines whether the anti-theft device is on alert. The antitheft device enters a warning state when the driver locks the vehicle by performing a predetermined operation. For example, when the engine is stopped and the door is locked via the key cylinder.

When the security system is under the anti-theft control, the monitoring signal is periodically transmitted to each of the nodes 3, 4 and 5 through the multiplex communication line. For this reason, the front node 2 determines whether or not a certain time has elapsed. Then, every time a fixed time elapses, the monitoring signal is output to the other nodes, that is, the meter node 3, the door node 4, and the rear node 5.

On the other hand, the meter node 3, the door node 4, and the rear node 5 output a response signal, that is, an ANC signal, when there is no abnormality. When the front node 2 receives this signal, it determines that there is no abnormality and continues program execution. A from the meter node 3, door node 4 or rear node 5 for the monitoring signal
If there is no response from the NC signal, the front node 2
Is regarded as abnormal and shifts from a warning state to a warning state and issues a warning. That is, actions such as activation of an alarm buzzer and lighting of an alarm lamp are taken.

On the other hand, since the front node 2 periodically outputs the monitoring signal to the meter node 3, the door node 4, and the rear node 5 even when there is no security system for preventing the theft, these nodes 3, 4, 5 or an abnormality of its multiplex communication system can be detected. When an abnormality is detected during the non-warning system, the driver is prevented from entering the warning system even if the driver tries to put it in the warning system. In this state, when the driver or the like operates the anti-theft device to take precautions, the warning lamp 8 is turned on to notify the abnormality.

[0017]

According to the present invention, it is possible to provide a highly reliable theft prevention device while suppressing the enlargement and complexity of the harness by using the multiplex communication system.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a device configuration of an anti-theft device using a multiplex communication system according to an embodiment of the present invention,

FIG. 2 is a flowchart showing the contents of anti-theft control according to the first embodiment of the present invention.

[Explanation of symbols]

1 anti-theft device, 2 front node, 3 meter node, 4 anode, 5 rear anode, 6 multiplex communication line.

Claims (2)

[Claims] 1. A main node for performing antitheft control, at least one subnode connected to various sensors for detecting various states of a vehicle for antitheft, and multiple communication between the main node and the subnode. And a multi-communication line to be connected, wherein the main node periodically transmits a monitoring signal to the sub-node via the multi-communication line when in a security system by the anti-theft control, and a response signal from the sub-node is transmitted. An anti-theft device, characterized in that it is arranged to give an alarm if not present. 2. The main node according to claim 1,
Before entering the security system for theft prevention, when an abnormality is detected in the communication state with the subnode, the security system for the antitheft control is configured so that it is impossible to take the security system. apparatus.