JP3073325B2 - Door lock control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock control device for performing control via multiple communication lines.

[0002]

2. Description of the Related Art Apparatuses for electrically controlling the locking and unlocking of motor vehicle doors are known. JP-A-1-27523
No. 9 discloses an example of a device for electrically controlling the unlocking and unlocking of such a door. In general, when controlling electric and electronic devices mounted on vehicles,
It has been proposed to use multiple communication lines in order to suppress the enlargement and complexity of the harness. Japanese Unexamined Patent Publication (Kokai) No. 62-4568 discloses a multiplex communication system in which an operation switch is connected to an output device such as various display devices by a multiplex communication line to perform control.

[0003]

A vehicle is provided with a plurality of lock mechanisms for locking and unlocking each door corresponding to the door. In the case of configuring a door lock control device for controlling the door lock mechanism using a multiplex communication system, a plurality of control nodes are installed at appropriate locations corresponding to the respective lock mechanisms. Then, when any one of the lock mechanisms is operated, a signal is sent between the control nodes via the multiplex communication line to respond to the operation of any one of the door lock mechanisms via the control node. Thus, the door lock mechanisms of all vehicles are simultaneously locked and unlocked. In each control node, a control unit including a microcomputer repeatedly executes a control program for processing a lock / unlock control signal input via any of the control nodes. When the signal is input, the lock mechanism is operated via an actuator connected to the signal to unlock and unlock the door.

The execution cycle of this control program starts at different timings at each control node. When two or more control signals are input within the time range of one execution cycle in the entire door lock control system, the execution cycle of the program is different in each control node as described above.
A situation occurs in which the content of the control signal input by the control node differs. As a result, there is a possibility that the control signals output from the nodes to the respective actuators vary, resulting in inconsistencies in the operation of locking or unlocking depending on the door.

[0005] This problem cannot be solved even by prioritizing the signals and preferentially adopting one of the signals. The present invention has been made in view of such circumstances, and an object of the present invention is to provide a door lock control device using a multiplex communication system that can eliminate inconsistency in operation between a plurality of control nodes. .

[0006]

To solve the above-mentioned problems, the present invention is configured as follows. A door lock control device according to the present invention includes: a plurality of control nodes for controlling a door lock of a vehicle; an actuator connected to the control node for unlocking a door according to a control signal from the control; A multiplex communication line that connects the nodes so that they can communicate with each other, wherein each of the control nodes receives a plurality of door lock control signals last when a plurality of door lock control signals are input during one execution cycle of the door lock control program. The control program is executed by adopting the door lock control signal.

[0007]

According to the present invention, a plurality of control nodes are provided correspondingly for controlling the lock mechanisms of the respective doors, and the respective control nodes are communicably connected to each other via a multiplex communication line. I have. When one of the lock mechanisms provided on the door is operated, the corresponding control node transmits the signal to another node. The other nodes that have received the control signal unlock the lock mechanism via the actuator according to this signal. Each control node repeatedly executes a control program to lock and unlock the door based on the control signal. When a control signal is input, a program is executed based on the control signal to lock and unlock the door via the actuator.

The control of the actuator at each control node is performed independently of each other, so that the timing of the program execution cycle differs from one another. Therefore, if a plurality of control signals are input to the door lock control system during one execution cycle of the program, the control signals input during one execution cycle of each control program may differ depending on the control node.

In the present invention, one of the programs of the control node is used.
When a plurality of control signals are input during the execution cycle, the control program is set so that control is executed based on the last input control signal. By doing so, even if the input signal differs at each control node, the signal finally output to the actuator matches.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. Referring to FIG. 1, the door lock control device according to the present example includes three control nodes of an A node 1, a B node 2, and a C node 3. A node 1 and B node 2
Are connected to door lock motors 4 and 5 as actuators, and output a signal to the door lock motors 4 and 5 to lock and unlock the door. Further, the A node 1 and the B node 2 are locked switches 6 and 7 that close and generate a signal when a door corresponding to the node is locked and an unlock switch that closes and generates a signal when the door is unlocked. Connected to switches 8 and 9
Signals from these switches 6, 7, 8 and 9 are input.

The C node 3 is connected to two door lock motors 10 and 11 and a keyless entry unit 12. The keyless entry unit 12 receives a signal from the keyless remote controller 13 and inputs a control signal to the C node 3. Further, a signal from the vehicle speed sensor 14 is also input to the C node 3.

These A node 1, B node 2 and C node 3 are communicably connected to each other by a multiplex communication line 15. A node 1, B node 2 and C node 3
Has a controller composed of a microcomputer having a microprocessor and a memory, and a multiplex communication module for processing information from a multiplex communication line by interfacing. The specific hardware configuration of each of these is a well-known content and does not constitute a part of the content of the present invention, and therefore detailed description is omitted.

As shown in FIG. 2, for example, the function data constituting the contents of the control signal transmitted by the multiplex communication line 15 includes a start message 16, a signal priority 17, a signal type 18, a transmission data 19, and a data It includes information such as an abnormality check 20, a data end message 21, an acknowledgment 22, and an end message 23. In the door lock control device of this example, when the door is locked or unlocked manually or by remote control operation at the A node 1, the B node 2 or the C node 3, this signal is transmitted to the lock switches 6, 7, the unlock switch. 8, 9
Alternatively, this signal is input to the corresponding node via the keyless entry unit 12, and this signal is transmitted from the corresponding node to each node via the multiplex communication line, and the doors other than the operated door are unlocked via the door lock motor. Done.

When the lock switch 6 of the A node 1 is operated to lock one door, a signal is input from the switch 6 to the A node 1, and the signal is input from the A node 1 via the multiplex communication line. The lock signal is transmitted to the B node 2 and the C node 3. At each node, a control program for door lock control is repeatedly executed. In this case, when a lock signal from the A node 1 is input, the control program is executed in accordance with the signal and the door lock motor 4 is operated. I do. In this case, since the signal is a lock signal, the B node 2 and the C node 3 process the lock signal as an input signal and operate the door lock motors 5, 10, 11 to lock the corresponding door. Thereby, the lock mechanisms of all the doors mounted on the vehicle are locked.

The same processing is performed when locking or unlocking is performed in the B node 2 or the C node 3. Thus, when one of the door lock mechanisms mounted on the vehicle is operated, the other doors are similarly unlocked. No problem occurs when the control signal related to the door operation is input at the normal timing as described above. However, when a plurality of control signals are input during one execution cycle of the control program of each node, the following is performed. Problems arise.

FIG. 3 shows an A node 1 according to the conventional problem.
A case will be described as an example where the relationship occurs in the relationship between and B node 2. The A node 1 and the B node 2 process the lock / unlock control signal input via the multiplex communication line 15 as described above, and perform control for outputting a control signal to the door lock motors 4 and 5. It is running continuously and repeatedly.
Since the execution control of this program is independently performed in each node, the execution cycle of the A node 1 and the B node 2 is not the same but is different.

At the A node 1, the door lock control device is off until the end point T1 of the first program execution cycle shown in FIG.
The lock signal and the unlock signal are input to the A node 1 until the end point T2 of the next program execution cycle. When two or more control signals are input during one execution cycle of the program, in order to avoid confusion, priority is given to the signals as a control to be normally performed, and the program is executed using a signal with a higher priority. It is supposed to.
In the control shown in FIG. 3, the unlock signal is set to be prioritized. Therefore, in the A node 1, from the start point T1 to the end point T3 of the first program execution cycle shown in FIG.
The lock signal and the unlock signal are input, and the unlock signal is adopted in the execution of the program in the next cycle, and the unlock signal is output to the door lock motor. Thereafter, the lock signal is input to the A node 1 again during the execution of the program starting from the time point T3. As a result, a lock signal is output to the door lock motor by executing the next program starting at time T5. After all A
In the node 1, when the above three control signals are input, a lock signal is finally output to the door lock motor.

On the other hand, in the B node 2, the first program execution cycle in FIG. 3 ends at time T2, and the next program execution cycle starts. In this case, since the lock signal is input to the B node 2 during the execution of the program ending at the time point T2, the lock signal is adopted in the execution of the program starting from the time point T2, and the lock signal is transmitted to the door lock motor 5. Is output. And time T
2, a lock signal and an unlock signal are input during execution of the program that ends at time T4.
Therefore, the unlocking with a higher priority is adopted in the program execution from the time T2 to the time T4, and the final control signal output to the door lock motor 5 of the B node 2 becomes the unlock signal, and the final signal of the A node 1 becomes Does not match.

The control of this embodiment will be described with reference to FIG. A
In the node 1, the lock signal and the unlock signal are input as described above during the execution period of the start point T1 and the end point T3. In the control of the present embodiment according to the present invention, the last received control signal is defined as the start point at the next time point T3. To be used in program execution. Therefore, in this case, the unlock signal is adopted and output to the door lock motor 4 by execution from time T3. Then, since the lock signal is further input to the A node 1 during the program execution cycle from the time T3, the lock signal is adopted and output to the door lock motor 4 in the program execution from the time T5. That is, when the series of signals are received by the A node 1, the final control signal is a lock signal.

In the B node 2, the first program execution ends at time T2, and a lock signal is input during the execution. Therefore, in the execution of the program starting from time T2 and ending at time T4, a lock signal is output to the door lock motor 5. During execution of the program from time T2 to T4, two unlock signals and a lock signal are further input to the B node. In this case, since the signal received last is the lock signal, the B node 2 adopts and executes the lock signal in the next program execution starting from the time point T4. Therefore, the final control signal at the B node becomes a lock signal, and the final output signals of the A node 1 and the B node 2 match.

As described above, in the control device according to the present invention, it is possible to make the final control signals consistent between the nodes.

[0022]

According to the present invention, in a door lock control device using a multiplex communication system, even if input is performed continuously in a short period of time, finalization of all control nodes can be performed without causing confusion. Instructions can be matched,
A door lock control device with high control accuracy can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a device configuration of a door lock control device according to one embodiment of the present invention;

FIG. 2 is an explanatory diagram showing the contents of function data;

FIG. 3 is an explanatory diagram showing the contents of door lock control in a conventional multiplex communication system;

FIG. 4 is an explanatory diagram showing contents of door lock control in the multiplex communication system according to the present invention.

[Explanation of symbols]

1 A node, 2 B node, 3 C node, 4, 5,
10, 11 door lock motor, 6, 7, 8, 9 switch, 15 multiplex communication lines.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-146079 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E05B 65/20 B60R 16/02 665 E05B 49 / 00

Claims (1)

(57) [Claims] 1. A plurality of control nodes for controlling a door lock of a vehicle, an actuator connected to the control node to lock and unlock a door according to a control signal from a control, A multiplex communication line communicatively connected, wherein each of the control nodes receives a plurality of door lock control signals when a plurality of door lock control signals are input during one execution cycle of the door lock control program. And a control program for executing the control program.