JP6804962B2 - Electronic key system - Google Patents

Description

The present invention relates to an electronic key system that wirelessly collates an ID with an electronic key.

Some conventional electronic key systems have an in-lock prevention function that prevents the vehicle door from being locked while the electronic key is left indoors (see Patent Document 1 and the like). This type of in-lock prevention function, for example, when a door lock operation is executed on a vehicle door, forms a communication area in the room and confirms whether or not ID verification with an electronic key is established, and ID verification is established. Then, assuming that the electronic key is left in the room, the vehicle door will not be put into the locked state and will be kept unlocked.

JP-A-2010-195229

By the way, in recent years, the act of establishing communication between an electronic key placed in a house or the like and a vehicle by a repeater and illegally establishing ID verification has been regarded as a problem. As a countermeasure, for example, a vibration detection unit is provided in the electronic key, the power of the electronic key is turned on at the time of motion detection, and the power of the electronic key is turned off in the motion non-detection unit. Prevents ID verification from being performed. This makes it possible to prevent the above-mentioned unauthorized establishment of communication.

However, if this measure is taken, it will hinder the measures against leaving the electronic key in the car. The reason is that when the vehicle door is locked from the outside, if the electronic key left in the room is in the power off state, the ID verification in the room will not be established and it will be judged that there is no misplacement. is there. Therefore, in this case, there is a problem that the vehicle door is locked and becomes in-lock even though the electronic key exists in the room.

An object of the present invention is to provide an electronic key system capable of preventing in-lock from occurring even if a vibration detection unit is provided on the electronic key to take measures against the establishment of unauthorized communication.

An electronic key system that solves the above-mentioned problems wirelessly performs ID collation with an electronic key provided with a vibration detection unit, detects the movement of the electronic key by the vibration detection unit, and collates with the ID collation result. In a configuration in which whether or not the on-board device can be operated is selected from the movement of the electronic key, when a vehicle door lock operation is detected, the on-board vibration imparting unit is driven to vibrate the vehicle. ID verification is performed indoors with the key vibration unit that detects vibration with the vibration detection unit and turns on the power to the electronic key while the power is off, and the electronic key activated by detecting the vibration with the vibration detection unit. It is equipped with an in-lock processing unit that determines the presence or absence of in-lock by confirming whether or not it is established.

According to this configuration, when the vehicle door is locked, the vibration applying portion is driven to vibrate the vehicle. Therefore, when performing ID verification in the room to confirm that the electronic key has been misplaced in the room, even if the electronic key is placed in the room with the power off, the vehicle vibrates due to the drive of the vibration imparting unit. By applying vibration to the electronic key, the power of the electronic key is turned on, so that it is possible to complete the ID collation in the room. As a result, misplacement of the electronic key is detected and the vehicle is not locked in. Therefore, even if a vibration detection unit is provided on the electronic key to take measures against the establishment of unauthorized communication, it is possible to prevent in-lock from occurring.

In the electronic key system, the electronic key, before Symbol vibration detection unit shifts to the power-on when the motion detection by, it is preferable that a power-off during movement undetected. According to this configuration, it is possible to prevent the establishment of unauthorized communication between the vehicle and the electronic key by a simple process of switching the power of the electronic key on and off.

In the electronic key system, it is preferable that the key vibrating unit drives the vibration applying unit each time the vehicle door is locked. According to this configuration, it is advantageous to ensure that the electronic key is transitioned to power-on.

In the electronic key system, the in-lock processing unit performs outdoor ID collation for confirming whether or not ID collation with the electronic key is established in a communication area formed outdoors, and the in-lock processing unit in a communication area formed indoors. It is preferable to determine whether or not there is an in-lock based on each collation result with the indoor ID collation for confirming whether or not the ID collation with the electronic key is established. According to this configuration, since the misplacement of the electronic key in the room is confirmed based on the results of ID verification both outdoors and indoors, it is advantageous to correctly determine whether or not the electronic key is misplaced in the room. Become.

In the electronic key system, it is preferable that the key vibrating unit drives the vibration applying unit at the same time as the communication of the outdoor ID collation. According to this configuration, it is possible to shorten the time required to drive the vibration imparting unit and confirm that the electronic key has been misplaced in the room through ID verification communication.

According to the present invention, even if the electronic key is provided with a vibration detection unit to take measures against the establishment of unauthorized communication, it is possible to prevent in-lock from occurring.

The block diagram of the electronic key system of one Embodiment. (A) is an outdoor LF radio wave communication area diagram, and (b) is an indoor LF radio wave communication area diagram. A flowchart showing the processing of the in-lock prevention function. Explanatory drawing which shows the operation example of the vibration addition part of another example.

Hereinafter, an embodiment of the electronic key system will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the vehicle 1 includes an electronic key system 3 that wirelessly collates with an electronic key 4 to execute or permit the operation of the device 2. The electronic key system 3 is a key operation-free system that executes ID verification by narrow-range radio in the wake of communication from the vehicle 1. In the key operation free system, ID verification (smart verification) is automatically performed without directly operating the electronic key 4. The device 2 includes, for example, a door lock device 5 and an engine 6.

The electronic key system 3 wirelessly performs ID collation (smart collation) with the electronic key 4 provided with the vibration detection unit 9, and detects the movement of the electronic key 4 by the vibration detection unit 9 to match the ID collation result. From the movement of the electronic key 4, it is selected whether or not the in-vehicle device 2 can be operated. In the case of this example, the power of the electronic key 4 is turned on only when the vibration detection unit 9 detects the vibration, and if the ID verification is established in that state, the operation of the device 2 is permitted. That is, when the power of the electronic key 4 is turned off without detecting vibration, the ID collation is not executed, and the establishment of the ID collation not intended by the user is prevented.

The vehicle 1 includes a collation ECU (Electronic Control Unit) 11 that performs ID collation, a body ECU 12 that manages the power supply of vehicle-mounted electrical components, and an engine ECU 13 that controls the engine 6. These ECUs are electrically connected via a communication line 14 in the vehicle. The communication line 14 includes, for example, CAN (Controller Area Network) and LIN (Local Interconnect Network). The electronic key ID of the electronic key 4 registered in the vehicle 1 is registered in the memory (not shown) of the collation ECU 11. The body ECU 12 controls a door lock device 5 that switches the lock / unlock of the vehicle door 15.

The vehicle 1 includes an outdoor transmitter 18 capable of transmitting radio waves outdoors, an indoor transmitter 19 capable of transmitting radio waves indoors, and a radio wave receiver 20 capable of receiving radio waves in the vehicle 1. The outdoor transmitter 18 and the indoor transmitter 19 transmit radio waves in the LF band. The radio wave receiver 20 receives radio waves in the UHF band. The electronic key system 3 is a two-way communication of LF-UHF.

The electronic key 4 includes a key control unit 23 that controls the operation of the electronic key 4, a receiving unit 24 that receives radio waves in the electronic key 4, and a transmitting unit 25 that transmits radio waves in the electronic key 4. The receiving unit 24 can receive LF radio waves. The transmission unit 25 can transmit UHF radio waves. An electronic key ID unique to the electronic key 4 is registered in the memory (not shown) of the key control unit 23.

The electronic key 4 includes the above-mentioned vibration detection unit 9 that detects the vibration generated in the electronic key 4. The vibration detection unit 9 includes, for example, an acceleration sensor (G sensor), and outputs a detection signal (acceleration signal) to the key control unit 23. The key control unit 23 determines the presence or absence of vibration applied to the electronic key 4 based on the detection signal input from the vibration detection unit 9. For example, when there is vibration, the power of the electronic key 4 is turned on, and when there is no vibration, the power of the electronic key 4 is turned on. , Turn off the power of the electronic key 4.

As shown in FIG. 2A, when the wake signal for activating the electronic key 4 is transmitted from the outdoor transmitter 18 by the LF radio wave when the vehicle is parked, the electronic key 4 vibrates and the power is turned on. When the wake signal is entered into the communication area Ea and received, the wake signal is activated from the standby state. The collation ECU 11 starts ID collation (outdoor smart collation) with the activated electronic key 4. This smart verification includes, for example, electronic key ID verification for confirming the correctness of the electronic key ID, challenge response authentication, and the like. When the collation and authentication are established, the collation ECU 11 processes the ID collation as successful, and executes or permits the locking and unlocking of the vehicle door 15.

As shown in FIG. 2B, when the collation ECU 11 detects the user's ride based on the output of the door courtesy switch 28 or the like, the collation ECU 11 forms an LF radio wave communication area Eb in the room and performs smart collation in the room (indoor smart collation). ) Is executed. At this time, when the indoor transmitter 19 transmits a wake signal instead of the outdoor transmitter 18 and the electronic key 4 receives the wake signal, the same smart collation as in the case of outdoors is started. Then, when the collation ECU 11 confirms that the indoor smart collation is established, the collation ECU 11 permits the transition operation of the power supply state (engine start operation) by the engine switch 29 provided in the driver's seat.

Returning to FIG. 1, the electronic key system 3 has an in-lock prevention function that prevents the vehicle door 15 from being locked while the electronic key 4 is placed in the room. The in-lock prevention function determines whether the electronic key 4 is left in the room through ID verification (smart verification) when the door lock switch 33 provided on the door handle 32 of the vehicle door 15 is operated. , When the electronic key 4 is misplaced, the vehicle door 15 is not allowed to shift to the lock, and the in-lock is prevented.

In this case, the electronic key system 3 includes a key vibration unit 36 that drives the vehicle-mounted vibration imparting unit 35 to vibrate the vehicle 1 when the vehicle door 15 is locked. The key vibrating unit 36 is provided in the body ECU 12. When the key vibrating unit 36 detects that the door lock switch 33 provided on the door handle 32 of the vehicle door 15 has been operated in the vehicle door 15 in the fully closed state, the key vibrating unit 36 drives the vibration applying unit 35 to drive the vehicle 1. Vibrate. Then, this vibration is detected by the vibration detection unit 9 of the electronic key 4, and the power is turned on to the electronic key 4 while the power is off.

The electronic key system 3 includes an in-lock processing unit 37 that determines whether or not there is an in-lock when the vehicle door 15 is locked. The in-lock processing unit 37 is provided in the collation ECU 11. The in-lock processing unit 37 determines the presence or absence of in-lock based on the collation results of the outdoor smart collation and the indoor smart collation. Even if the power of the electronic key 4 is turned off, the in-lock processing unit 37 of this example performs ID collation (smart collation) with the electronic key 4 whose power is turned on by the vibration applying unit 35, and in-locks the electronic key 4. Judge the presence or absence of.

Next, the operation and effect of the electronic key system 3 according to the embodiment of the present invention will be described with reference to FIG.
As shown in FIG. 3, when the door lock switch 33 is operated on the fully closed vehicle door 15 in step 101, the body ECU 12 detects this operation from the outputs of the door courtesy switch 28, the door lock switch 33, and the like. To do.

In step 102, when the key vibration unit 36 detects that the door lock switch 33 has been operated on the vehicle door 15 in the fully closed state, the key vibration unit 36 drives the vehicle-mounted vibration imparting unit 35 to drive the electronic key 4 existing in the vehicle. Add vibration to the door. The vibration applying portion 35 includes, for example, a crankshaft, a hybrid motor, a seat motor, and the like. Then, the vehicle 1 is vibrated by cranking, hybrid motor drive, seat motor drive drive, or the like, and this vibration is applied to the electronic key 4. As a result, even if the electronic key 4 is in the power-off state, the vehicle 1 vibrates, and the vibration causes the electronic key 4 to switch to the power-on state.

In step 103, the collation ECU 11 executes outdoor smart collation and confirms whether or not the electronic key 4 exists in the LF area outside the vehicle. Here, since the legitimate user has the electronic key 4, the outdoor smart collation is established. Then, if the outdoor smart collation is established, the process proceeds to step 104. On the other hand, if the person does not have the electronic key 4, the outdoor smart collation cannot be established. Then, if the outdoor smart collation is not established, the process is terminated, the vehicle door 15 is not shifted to the door lock, and the vehicle door 15 is kept unlocked.

In step 104, when the outdoor smart collation is established, the in-lock processing unit 37 executes the indoor smart collation in order to confirm the in-lock. Here, if the electronic key 4 is switched to the power-on state by the vibration of the vehicle 1, the standby state is switched to the activated state by the wake signal transmitted from the indoor transmitter 19. Therefore, the indoor smart collation is executed, and if the indoor electronic key 4 is a regular key, the indoor smart collation is established. Then, if the indoor smart collation is established, the process proceeds to step 105. On the other hand, if the indoor smart collation is not established, the process proceeds to step 106.

In step 105, the in-lock processing unit 37 recognizes that the in-lock has occurred due to the establishment of the indoor smart collation, and therefore notifies the user that the in-lock has occurred. As the notification of the in-lock, for example, a buzzer is sounded or a speaker or the like announces the fact. Further, the vehicle door 15 is not shifted to the door lock and is kept unlocked.

In step 106, the body ECU 12 switches the vehicle door 15 to the locked state by confirming that the outdoor smart collation is established, while the indoor smart collation is not established. As a result, when the authorized user gets off and operates the door lock switch 33, the vehicle door 15 is locked without any problem.

By the way, in the case of this example, when the door lock switch 33 of the vehicle door 15 is operated, the vibration applying unit 35 is driven to vibrate the vehicle 1. Therefore, when performing indoor smart collation to confirm that the electronic key 4 is misplaced in the room, even if the electronic key 4 is placed in the room with the power off, the vehicle is driven by the vibration imparting unit 35. Since the power is turned on to the electronic key 4 by applying the vibration to the electronic key 4 by the vibration of 1, it is possible to complete the indoor smart collation. As a result, the misplacement of the electronic key 4 is detected, and the vehicle 1 is not locked in. Therefore, even if the electronic key 4 is provided with the vibration detection unit 9 to take measures against the establishment of unauthorized communication, it is possible to prevent the in-lock from occurring.

The electronic key 4 shifts to power-on when motion is detected by the vibration detection unit 9, and turns off when motion is not detected. Therefore, it is possible to prevent the establishment of unauthorized communication between the vehicle 1 and the electronic key 4 by a simple process of switching the power of the electronic key 4 on and off.

The key vibrating unit 36 drives the vibration applying unit 35 each time the vehicle door 15 is locked. Therefore, it is advantageous to make sure that the electronic key 4 is turned on.
The in-lock processing unit 37 has an outdoor ID collation (outdoor smart collation) for confirming whether or not ID collation with the electronic key 4 is established in the communication area Ea formed outdoors, and a communication area Eb formed indoors. Based on each collation result with the indoor ID collation (indoor smart collation) for confirming whether or not the ID collation with the electronic key 4 is established, the presence or absence of the in-lock is determined. Therefore, since the misplacement of the electronic key 4 in the room is confirmed based on the collation results of both the outdoor smart collation and the indoor smart collation, it is advantageous to correctly determine whether or not the electronic key 4 is misplaced in the room. Become.

The embodiment is not limited to the configuration described so far, and may be changed to the following aspects.
-As shown in FIG. 4, when a plurality of communication areas Eb (two of Eb1 and Eb2 in the example of the figure) are formed in the room, the priority is given to the communication of the ID verification in the room to be performed at the time of misplacement confirmation. It may be set. For example, when confirming misplacement, the communication area Eb for which ID verification has been established with the electronic key 4 at the time of the previous confirmation is first formed to perform key confirmation, and if the electronic key 4 cannot be detected, another communication area Eb is used. You may move to the judgment of. In this case, it is possible to efficiently confirm the misplacement of the electronic key 4.

The vibration waveform of the vibration applying unit 35 may be, for example, a frequency or amplitude that can be detected only by the electronic key 4. In this case, the user in the room does not have to feel the vibration of the vibration applying unit 35, which is advantageous in this respect.

The key vibration unit 36 may drive the vibration imparting unit 35 at the same time as the communication of the outdoor ID collation (outdoor smart collation). In this case, it is possible to shorten the time required to drive the vibration applying unit 35 and confirm that the electronic key 4 has been misplaced in the room through smart collation communication.

-The driving of the vibration applying unit 35 is not limited to being executed every time the door lock operation is performed. For example, when the door lock switch 33 is operated, the vibration applying unit 35 is not driven, and only when it is determined that the electronic key 4 is not in the room by performing indoor ID collation (indoor smart collation), the vibration applying unit 35 May be driven, and then the room ID collation may be re-executed to confirm the misplacement. In this case, it is not necessary to uselessly drive the vibration applying unit 35.

The drive of the vibration applying unit 35 may be executed, for example, at the timing when the vehicle door 15 is closed.
-In the case of ID collation (smart collation) that takes into account the vibration (movement) generated in the electronic key 4, for example, the movement generated in the electronic key 4 is determined from the detection signal (acceleration signal) of the vibration detection unit 9 of the electronic key 4. (Motion determination) may be performed, and the determination result may be used as a determination logic for determining whether or not ID collation is established. Specifically, when the specified motion operation is set and the movement according to the operation is given to the electronic key 4, the establishment of ID verification is permitted, and when the movement does not comply with the regulation, the establishment of ID verification is established. It may not be allowed.

-The power off means, for example, a state in which the electronic key 4 (key control unit 23) is not energized and the function is stopped.
The power-on means, for example, a state in which the electronic key 4 (key control unit 23) is energized and can be shifted to either a standby state or a start-up state.

The standby state is a state of waiting for radio wave reception (reception of a wake signal), for example, a state in which the receiving unit 24 is energized.
-The activated state means a state in which the electronic key 4 (key control unit 23) is being driven.

The vibration time of the vibration applying unit 35 can be set to various values.
-When the door lock switch 33 is re-operated immediately after the previous operation of the door lock switch 33, it is considered that the electronic key 4 is still likely to keep the power on, and the vibration applying portion 35 is not vibrated. It may be.

-The location and number of communication areas Ea and Eb may be appropriately changed according to the arrangement position and radio wave strength of the LF antenna.
The door lock operation is not limited to the operation of the door lock switch 33, and may be changed to another mode such as an operation in which the lock button is pressed on the electronic key 4.

The electronic key system 3 may have LF antennas arranged on the left and right sides of the vehicle body, and may determine the indoor / outdoor state of the electronic key 4 from the combination of responses from the electronic key 4 to these antennas.

-The frequency of the radio wave used in the electronic key system 3 may be changed to other than LF and UHF.
-The electronic key system 3 is not limited to having different radio wave frequencies in the outward path and the return path of communication, and both may be radio waves having the same frequency.

-For communication between the vehicle 1 and the electronic key 4, various communication formats such as Bluetooth (registered trademark) can be adopted.
-The electronic key 4 can be changed to various terminals such as a high-performance mobile phone.

1 ... Vehicle, 2 ... Equipment, 3 ... Electronic key system, 4 ... Electronic key, 5 ... Door lock device, which is an example of equipment, 6 ... Engine, which is an example of equipment, 9 ... Vibration detector, 15 ... Vehicle door, 35 ... Vibration imparting unit, 36 ... Key vibration unit, 37 ... In-lock processing unit, Ea ... Outdoor communication area, Eb (Eb1, Eb2) ... Indoor communication area.

Claims (5)

The electronic key provided with the vibration detection unit is wirelessly ID collated, and the vibration detection unit detects the movement of the electronic key. Based on the collation result of the ID collation and the movement of the electronic key, the vehicle is mounted on the vehicle. In an electronic key system that selects whether to operate the device
When the lock operation of the vehicle door is detected, the vehicle-mounted vibration imparting unit is driven to vibrate the vehicle, so that the vibration detection unit detects this vibration and supplies power to the electronic key while the power is off. The key vibrating part to be input and
It is provided with an in-lock processing unit for determining the presence or absence of in-lock by confirming whether or not ID verification is established in the room with the electronic key activated by detecting vibration by the vibration detection unit. Characterized electronic key system. The electronic key is pre Symbol vibration detection unit shifts to the power-on when the motion detection by the electronic key system according to claim 1 which is a power-off during movement undetected. The electronic key system according to claim 1 or 2, wherein the key vibrating unit drives the vibration applying unit each time the vehicle door is locked. The in-lock processing unit performs outdoor ID collation for confirming whether or not ID collation with the electronic key is established in the communication area formed outdoors, and ID collation with the electronic key in the communication area formed indoors. The electronic key system according to any one of claims 1 to 3, which determines whether or not there is an in-lock based on each collation result with the indoor ID collation for confirming whether or not is established. The electronic key system according to claim 4, wherein the key vibrating unit drives the vibration applying unit at the same time as the communication of the outdoor ID collation.

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