JP2016056526A - On-vehicle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle device that is made less in delay of a time from a switch operation to actual unlocking of doors of a vehicle when code matching using radio communication with a portable machine is performed after a user operates a switch operated when the user makes a request to unlock the doors of the vehicle.SOLUTION: An LF transmission processing part 23 allows transmission of a request signal before debounce processing is completed by transmitting a request signal when a signal of an unlock switch 5 varies, and then allows automatic unlocking of vehicle doors when a portable identification code included in a response signal sent back from a portable machine having received the request signal matches a regular portable identification code and when an ON/OFF state of the unlock switch 5 determined as the debounce processing is completed is an ON state.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an in-vehicle device that locks and unlocks a door of a vehicle according to a result of code verification using wireless communication with a portable device carried by a user.

  2. Description of the Related Art Conventionally, an electronic key system that locks and unlocks a door of a vehicle in accordance with a result of code verification using wireless communication between a portable device carried by a user and an in-vehicle device is known. As a vehicle-mounted device used in such an electronic key system, wireless communication between the vehicle-mounted device and the portable device is triggered by a switch such as a door lock opening / closing button provided on the outside handle of the vehicle door being turned on. An on-vehicle device that performs code verification used and locks and unlocks a vehicle door when verification is established is known (for example, Patent Document 1).

  In such a conventional in-vehicle device, in order not to cause a malfunction due to an excessive signal that does not represent the actual state of the switch that occurs before the switch transits to an on or off state, debounce processing that excludes the excessive signal is performed. After confirming the state of the switch, code verification using wireless communication between the in-vehicle device and the portable device is performed.

JP 2004-278050 A

  However, after debounce processing is performed and the state of the switch is determined, wireless communication between the in-vehicle device and the portable device is started, and when code verification is performed, after the user operates the door lock opening / closing button, There is a possibility that the time delay until the lock is unlocked increases and the user feels uncomfortable.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a portable device after a user operates a switch that is operated when the user requests locking / unlocking of a vehicle door. In the in-vehicle device that performs code verification using wireless communication, the delay in time from when the switch is operated until the door of the vehicle is actually unlocked is to be made smaller.

  An in-vehicle device of the present invention is mounted on a vehicle, and transmits a request signal for requesting transmission of a code to a predetermined range outside the vehicle compartment by wireless communication, and a portable device that has received the request signal. (1) a reception processing unit (25) that receives a response signal including a code for identifying the portable device, a code included in the response signal received by the reception processing unit, and a legitimate user's portable device The vehicle-mounted device includes a collation processing unit (26) that collates with the code of the vehicle, and a locking / unlocking control unit (28) that automatically performs locking / unlocking that is one of locking and unlocking of a vehicle door. Based on the signal of the locking / unlocking switch detected by the signal detection unit (21) for detecting the signal of the locking / unlocking switch that is operated when the user requests the locking / unlocking of the vehicle door, Lock / unlock switch The debounce processing unit (24) for performing a debounce process for determining the on / off state, and the transmission processing unit transmit a request signal when the signal of the unlocking / unlocking switch detected by the signal detecting unit is changed, and unlock control is performed. When the collation is established in the collation processing unit and the debounce processing in the debounce processing unit is completed and the on / off state of the locking / unlocking switch is on, the vehicle door is unlocked. It is characterized by automatically locking.

  According to this, the transmission processing unit receives a request signal when there is a change in the signal of the locking / unlocking switch that is operated when the user requests locking / unlocking that is either locking or unlocking of the vehicle door. Therefore, the request signal is transmitted before the debounce processing for determining the on / off state of the locking / unlocking switch is completed. And the lock | rock / unlocking switch which the collation with the code | cord | chord of the response signal returned from the portable device which received this request signal and the code | cord | chord of a regular user's portable device is materialized, and the debounce process was completed and was confirmed When the on / off state of the vehicle is on, the door of the vehicle is automatically locked and unlocked. Therefore, compared with the case where the request signal is transmitted after waiting for the debounce process to be completed, the time until the vehicle door is actually unlocked is shortened by the amount of the request signal transmitted without waiting for the debounce process. It becomes possible.

  As a result, in a vehicle-mounted device that performs code verification using wireless communication with a portable device after the user operates a switch that is operated when the user requests locking / unlocking of the vehicle door, the switch is operated. After that, the time delay until the vehicle door is actually unlocked and unlocked becomes smaller.

1 is a diagram illustrating an example of a schematic configuration of an electronic key system 100. FIG. 2 is a block diagram illustrating an example of a schematic configuration of a portable device 1. FIG. 4 is a flowchart illustrating an example of a flow of mobile-side smart-related processing in the mobile device 1. It is a block diagram which shows an example of a schematic structure of BCM2. It is a flowchart which shows an example of the flow of the vehicle-side smart related process in BCM2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
<Schematic Configuration of Electronic Key System 100>
FIG. 1 is a diagram showing an example of a schematic configuration of an electronic key system 100 to which the present invention is applied. As shown in FIG. 1, the electronic key system 100 includes a portable device 1 carried by a user and a body control module (hereinafter referred to as BCM) 2 mounted on a vehicle HV. This BCM2 corresponds to the in-vehicle device in the claims.

  The electronic key system 100 has a so-called smart function. The smart function refers to a function that performs code verification by wireless communication between the portable device 1 and the BCM 2 and performs door lock / unlock control and start permission when the code verification is established.

<Detailed configuration of portable device 1>
Next, the portable device 1 will be described with reference to FIG. As shown in FIG. 2, the portable device 1 includes a portable control unit 11, an LF reception unit 12, and a UHF transmission unit 13.

  The LF receiving unit 12 receives a signal transmitted from the vehicle HV side by an LF band (for example, 30 kHz to 300 kHz) radio wave via the LF antenna. As an example, the LF band radio wave is a 125 kHz radio wave. The LF receiver 12 is connected to the control IC 11 and outputs a received signal to the control IC 11.

  The UHF transmission unit 13 transmits the signal output from the control IC 11 on the UHF band (for example, 300 MHz to 3 GHz) from the UHF antenna. As an example, the UHF band radio wave is a 315 MHz band radio wave.

  The portable control unit 11 is a microcomputer including a CPU, a memory such as a ROM and a RAM, an I / O, and the like, and executes various control programs stored in the ROM to execute processing related to smart functions (hereinafter referred to as a portable-side smart). Various processing such as related processing) is executed. The non-volatile memory of the portable control unit 11 stores a regular vehicle identification code for identifying the legitimate user's vehicle HV and a portable code for identifying the portable device 1 as its own device.

  In addition, the portable device 1 is in a sleep state in which power consumption is significantly less than that in the wake-up state until a signal is received by the LF receiver 12, while a signal is received by the LF receiver 12. Will be described below assuming that the wake-up state occurs.

<Mobile-related smart processing>
Here, an example of the mobile-side smart-related process in the mobile device 1 will be described using the flowchart of FIG. The flowchart of FIG. 3 starts when the portable device 1 shifts to a sleep state, for example.

  First, in step S1, when the LF receiving unit 12 receives a signal transmitted by radio waves in the LF band (YES in S1), the portable device 1 shifts to a wake-up state and moves to step S2. . On the other hand, if no signal is received (NO in S1), the process of S1 is repeated.

  In step S2, the portable control unit 11 performs a collation process. In the verification process, code verification is performed to determine whether the above-mentioned regular vehicle identification code stored in the nonvolatile memory of the portable device 1 matches the code received by the LF receiver 12. A request signal, which will be described later, transmitted from the vehicle HV includes a vehicle identification code for identifying the transmission source vehicle HV. When the request signal is received from the vehicle HV of the authorized user, Code verification with the identification code is established. It should be noted that if the signal received by the LF receiver 12 does not include a code, the code verification is not established.

  In step S3, when the code collation in the collation process performed in S2 is established (YES in S3), the process proceeds to step S4. On the other hand, if the code verification is not established (NO in S3), the process proceeds to step S5.

  In step S4, the portable control unit 11 reads its own portable identification code stored in the nonvolatile memory, and the UHF transmission unit 13 transmits a response signal including the portable identification code on the UHF band radio wave. In step S5, the portable control unit 11 shifts the portable device 1 to the sleep state and ends the portable side smart-related processing.

<Detailed configuration of BCM2>
Next, an example of a schematic configuration of the BCM 2 will be described with reference to FIG. As shown in FIG. 4, the LF transmitter 3, the UHF receiver 4, the locking / unlocking switch 5, and the door lock actuator 6 are connected to the BCM 2.

  The LF transmission unit 3 transmits the signal input from the BCM 2 on the LF band radio wave from the LF antenna. For example, a plurality of LF antennas may be arranged in the vicinity of the side door or in the trunk. The UHF receiving unit 4 receives a signal transmitted from the portable device 1 using a UHF band radio wave via the UHF antenna. The UHF receiving unit 4 outputs the received signal to the BCM 2.

  The locking / unlocking switch 5 is a switch that is operated by a user when requesting locking / unlocking of a vehicle door such as a side door or a trunk door of the vehicle HV, and is provided on, for example, a handle knob of the outdoor handle of the vehicle HV. In the present embodiment, the following description will be made on the assumption that the locking / unlocking switch 5 is a mechanical switch.

  The door lock actuator 6 is an actuator for locking and unlocking a vehicle door such as a side door or a trunk door.

  The BCM 2 is mainly composed of a microcomputer including a CPU, a memory such as a ROM and a RAM, an I / O, and the like, and executes various control programs stored in the ROM (hereinafter referred to as a vehicle-side smart). Various processing such as related processing) is executed.

  The non-volatile memory of the BCM 2 stores a regular portable identification code for identifying the portable device 1 of the authorized user and a vehicle identification code for identifying the vehicle HV on which the device is mounted. . The vehicle identification code may be a vehicle ID or a device ID assigned to each BCM 2.

  Note that some or all of the functions executed by the BCM 2 may be configured in hardware by one or a plurality of ICs.

  As shown in FIG. 4, the BCM 2 includes a signal detection unit 21, a trigger detection unit 22, an LF transmission processing unit 23, a debounce processing unit 24, a UHF reception processing unit 25, a verification processing unit 26, a state management unit 27, and a door lock. A control unit 28 is provided.

  The signal detection unit 21 detects a signal from the locking / unlocking switch 5. The signal of the locking / unlocking switch 5 is a signal having a different voltage depending on whether the locking / unlocking switch 5 is on or off.

  The trigger detection unit 22 detects a change in the signal detected by the signal detection unit 21 as a trigger. As an example, in a state where the signal when the locking / unlocking switch 5 is in the OFF state is continuously detected for a predetermined time or longer, the detection of the signal when the locking / unlocking switch 5 is in the ON state is detected as a trigger. . The predetermined time referred to here may be any time longer than the time of the period of signal switching of the locking / unlocking switch 5 in the situation where debounce described later occurs.

  The LF transmission processing unit 23 causes the LF transmission unit 3 to transmit a request signal including a vehicle identification code for identifying the vehicle HV stored in the nonvolatile memory of the BCM 2. This request signal is also a signal for requesting transmission of the portable identification code of the portable device 1, and the LF transmission processing unit 23 corresponds to the transmission processing unit of the claims.

  The debounce processing unit 24 performs a debounce process for determining the on / off state of the locking / unlocking switch 5. Here, the debounce processing in the present embodiment will be described. When the locking / unlocking switch 5 is a mechanical switch as in the example of the present embodiment, since the contact of the locking / unlocking switch 5 mechanically bounces, the signal in the ON state immediately after the operation of the locking / unlocking switch 5 is turned off. A transient phenomenon called debounce occurs in which the signal in the state is repeated for a short period of time. The debounce described here is sometimes called chattering.

  The debounce processing unit 24 identifies the on / off state of the locking / unlocking switch 5 from the signal detected by the signal detection unit 21 when a certain period of time has elapsed since the trigger detection unit 22 detected the trigger, thereby causing a transient due to debounce. Excluding the signal, the on / off state of the locking / unlocking switch 5 is determined. The certain period referred to here is a period of time that is assumed to take until it becomes stable after a signal change due to debounce starts. The debounce processing unit 24 notifies the state management unit 27 of the determined on / off state of the locking / unlocking switch 5.

  The UHF reception processing unit 25 receives a signal transmitted from the portable device 1 using a UHF band radio wave via the UHF reception unit 4. More specifically, the above-described response signal transmitted from the portable device 1 is received. The UHF reception processing unit 25 corresponds to a reception processing unit in claims.

  The verification processing unit 26 performs code verification on whether the above-mentioned regular mobile identification code stored in the non-volatile memory of the BCM 2 matches the mobile identification code included in the response signal received by the UHF reception processing unit 25. . It should be noted that if the code received in the signal received by the UHF reception processing unit 25 does not include code verification. When code verification is performed, the verification processing unit 26 notifies the state management unit 27 of the result of code verification.

  The state management unit 27 manages the on / off state of the locking / unlocking switch 5 notified from the debounce processing unit 24 and the result of code verification notified from the verification processing unit 26. The door lock control unit 28 drives the door lock actuator 6 to lock and unlock the vehicle door. This door lock control part 28 is equivalent to the locking / unlocking control part of a claim.

<Automotive side smart-related processing>
Next, an example of the on-vehicle side smart related processing in the BCM 2 will be described using the flowchart of FIG. The flowchart in FIG. 5 may be configured to start when a predetermined period of time such as 1 second elapses after the vehicle door is locked or unlocked, for example.

  First, in step S21, when the trigger detection unit 22 detects that the signal detected by the signal detection unit 21 has changed as a trigger (YES in S21), the trigger detection unit 22 proceeds to step S22. On the other hand, when the trigger is not detected (NO in S21), the process of S21 is repeated. When the operation of the locking / unlocking switch 5 is performed, the signal detected by the signal detection unit 21 varies, so that the trigger is detected when the operation of the locking / unlocking switch 5 is performed.

  In step S <b> 22, the LF transmission processing unit 23 causes the LF transmission unit 3 to transmit a request signal including the vehicle identification code stored in the non-volatile memory of the BCM 2. That is, when there is a change in the signal of the locking / unlocking switch 5 detected by the signal detection unit 21, a request signal including the vehicle identification code is transmitted.

  In step S23, the debounce processing unit 24 performs a debounce process. When the debounce processing is completed, the state management unit 27 is notified of the on / off state of the locking / unlocking switch 5 determined by the debounce processing.

  In step S24, when the response signal returned from the portable device 1 is received by the UHF reception processing unit 25 (YES in S24), the process proceeds to step S25. On the other hand, if the response signal is not received by the UHF reception processing unit 25 within a certain period after the LF transmission processing unit 23 transmits the request signal from the LF transmission unit 3 (NO in S24), the vehicle-side smart-related The process ends.

  In step S25, a verification process for performing code verification between the mobile identification code included in the response signal received by the UHF reception processing unit 25 and the regular mobile identification code stored in the nonvolatile memory of the BCM2 is performed. 26 does. The result of the verification performed by the verification processing unit 26 is notified to the state management unit 27.

  In step S26, the code collation result managed by the state management unit 27 and the on / off state of the locking / unlocking switch 5 determined after completion of the debounce process indicate that the code collation is established and the locking / unlocking switch 5 is on. If it is confirmed (YES in S26), the process proceeds to step S27. On the other hand, if neither code verification is satisfied nor the on / off state of the locking / unlocking switch 5 is satisfied (NO in S26), the in-vehicle-side smart-related processing is terminated. For example, the process of S26 may be configured to wait until the debounce process is completed when the debounce process has not been completed.

  In step S27, the door lock control unit 28 drives the door lock actuator 6 to lock and unlock the vehicle door, and terminates the in-vehicle side smart related processing. For example, the vehicle door may be unlocked when the vehicle door is locked, and the vehicle door may be locked when the vehicle door is unlocked.

<Summary of Embodiment 1>
According to the configuration of the first embodiment, the LF transmission processing unit 23 transmits a request signal when the trigger detection unit 22 detects that the signal of the locking / unlocking switch 5 has changed, and thus the debounce processing is completed. A request signal will be sent before doing this. Then, the lock / unlock switch 5 that has been verified after the collation of the portable identification code and the regular portable identification code included in the response signal returned from the portable device 1 that has received the request signal has been completed and the debounce process has been completed. When the on / off state of the vehicle is on, the door of the vehicle is automatically locked and unlocked. Therefore, compared with the case where the request signal is transmitted after waiting for the completion of the debounce process, the time until the vehicle door is actually unlocked is reduced by the amount of the request signal transmitted without waiting for the debounce process. Is possible.

  In addition, according to the configuration of the first embodiment, the request signal is transmitted when the trigger detection unit 22 detects that the signal of the locking / unlocking switch 5 has changed, so that the request is periodically sent from the vehicle HV side. Compared with a configuration for transmitting a signal, power consumption on the vehicle HV side can be reduced.

(Modification 1)
In the first embodiment, the case where the locking / unlocking switch 5 is a mechanical switch has been described as an example, but the present invention is not necessarily limited thereto. For example, the locking / unlocking switch 5 may be configured as a capacitive or pressure-sensitive touch switch (hereinafter, modified example 1).

  Also in the case of the first modification, when it takes time to stabilize after the fluctuation of the signal of the locking / unlocking switch 5 is performed, a debounce process for excluding the transient signal is performed, and a request is made before the debounce process. What is necessary is just to make it the structure which transmits a signal.

  In addition, when the touch switch performs a debounce process for determining the switch state when the situation where a signal equal to or greater than the threshold value is obtained is repeated a plurality of times or for a certain period in order to exclude noise, the debounce process is performed. In addition, the request signal may be transmitted before the debounce processing.

(Modification 2)
As the locking / unlocking switch 5, a switch that is operated by the user when locking is requested (hereinafter referred to as locking switch) and a switch that is operated by the user when unlocking is requested (hereinafter referred to as unlocking switch) are provided. It is good also as a structure currently provided. In this case, the in-vehicle-side smart-related processing may be configured such that the lock is performed when the verification is established and the lock switch is turned on, while the unlocking is performed when the collation is established and the lock switch is turned on.

(Modification 3)
In the first embodiment, the configuration in which the debounce process and the collation process are performed in parallel is shown, but the present invention is not necessarily limited thereto. For example, it is good also as a structure (henceforth modification 3) which performs a collation process after the debounce process is completed. Even in the case of the third modification, compared to the configuration in which the request signal is transmitted after the debounce processing is completed, the vehicle door is actually unlocked and unlocked by the amount that the request signal can be transmitted before the debounce processing is completed. Time can be shortened.

(Modification 4)
In the first embodiment, the configuration in which the in-vehicle-side smart-related processing is applied to both locking and unlocking of the vehicle door is shown, but the present invention is not necessarily limited thereto. For example, the in-vehicle-side smart-related processing may be applied to only one of locking and unlocking the vehicle door.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Mobile device, 2 BCM (vehicle equipment), 21 Signal detection part, 23 LF transmission process part (transmission process part), 24 Debounce process part, 25 UHF reception process part (reception process part), 26 Collation process part, 28 Door Lock control unit (locking / unlocking control unit), 100 electronic key system

Claims (3)

Mounted on the vehicle,
A transmission processing unit (23) for transmitting a request signal for requesting transmission of a code to a predetermined range outside the passenger compartment of the vehicle by wireless communication;
A reception processing unit (25) for receiving a response signal including a code for identifying the portable device returned from the portable device (1) that has received the request signal;
A collation processing unit (26) for collating the code included in the response signal received by the reception processing unit with a code of a legitimate user's portable device;
An in-vehicle device provided with a locking / unlocking control unit (28) for automatically performing locking / unlocking which is either locking or unlocking of a door of the vehicle,
A signal detector (21) for detecting a signal of a locking / unlocking switch that is operated when a user requests the locking / unlocking of the door of the vehicle;
A debounce processing unit (24) for performing a debounce process for determining an on / off state of the locking / unlocking switch based on the signal of the locking / unlocking switch detected by the signal detection unit;
The transmission processing unit transmits the request signal when there is a change in the signal of the locking / unlocking switch detected by the signal detection unit,
The locking / unlocking control unit is in an on state when the collation is established in the collation processing unit, and the on / off state of the locking / unlocking switch determined after the debounce processing in the debounce processing unit is completed. The vehicle-mounted device is characterized in that the door of the vehicle is automatically locked / unlocked. In claim 1,
An in-vehicle device, wherein the debounce processing in the debounce processing unit and the verification processing in the verification processing unit are performed in parallel. In claim 1 or 2,
The debounce processing unit is based on the signal of the locking / unlocking switch detected by the signal detection unit by excluding the transient signal detected by the signal detection unit immediately after the locking / unlocking switch is operated. An in-vehicle device that performs a debounce process for determining an on / off state of the locking / unlocking switch.

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