JP2022117732A - electronic key system - Google Patents

Abstract

To provide an electronic key system capable of securing sufficient security without damaging convenience.SOLUTION: An electronic key system 1 detects a specific operation signal when a user performs an intentional specific operation and a general operation signal when the user performs a general operation other than the specific operation in a portable machine 2, and collates the detected specific operation signal with a registered specific operation signal registered beforehand, and also collates the detected registered general operation signal with a registered general operation signal registered beforehand. In an on-vehicle machine 3, when it is confirmed that a key signal received by wireless communication from the portable machine 2 coincides with a registered key signal registered beforehand, the specific operation signal coincides with the registered specific operation signal, and the general operation signal coincides with the registered general operation signal, unlocking of a door unit 4 is permitted.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to an electronic key system that performs authentication between a controlled object and a portable device, and allows the controlled object to operate when the authentication is established.

2. Description of the Related Art Conventionally, in vehicles such as automobiles, an electronic key system (smart key system) is known that performs locking/unlocking of doors and permission to start an engine, etc., through wireless communication. In this type of electronic key system, a user carries a portable device (smart key) such as a smartphone or a dedicated electronic key, approaches the vehicle, and performs predetermined user authentication between the portable device and the vehicle-mounted device. This makes it possible to unlock the door.

Furthermore, in recent electronic key systems, even when the portable device is out of the communication range with the vehicle, unlocking etc. is performed by establishing communication using a repeater. Proposed.

For example, Patent Literature 1 discloses that an electronic key can be operated by hitting it, and a signal (request signal) for requesting locking or unlocking according to the number of times the electronic key is hit is provided in the vehicle. A technique is disclosed for preventing relay attacks by transmitting to the machine.

Japanese Unexamined Patent Application Publication No. 2010-275701

However, with the technology disclosed in the above-mentioned Patent Document 1, for example, even if a third party who has stolen the electronic key performs a predetermined tapping motion, the vehicle can be unlocked, etc., so the vehicle can be effectively stolen. can be difficult to prevent. On the other hand, it is possible to configure the electronic key so as to permit unlocking, etc., on the condition that a plurality of different patterns of operations are performed on the electronic key. There is a risk of impairing the convenience of

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic key system capable of ensuring sufficient security without sacrificing convenience.

An electronic key system according to one aspect of the present invention includes a door unit provided to a locking object, a portable device that a user can carry, and a door unit installed to the locking object, based on the result of wireless communication with the portable device. and an installation device for permitting unlocking of the door unit, wherein the portable device is provided with the user holding the portable device and intentionally performs a specific operation on the portable device. a motion detection means for detecting specific motion information when performed and general motion information when the user carrying the portable device performs a general motion other than the specified motion; A key collating means for collating registration key information pre-registered in the installation device with key information transmitted from the portable device, and collation of the user's registered specific action information pre-registered with the specific action information. a specific action collating means for collating the registered general action information of the user registered in advance with the general action information; and the key information matching the registered key information and the specified unlock permission means for permitting unlocking of the door unit when the operation information matches the registered specific operation information and the general operation information matches the registered general operation information. .

ADVANTAGE OF THE INVENTION According to this invention, sufficient security can be ensured, without impairing convenience.

Schematic configuration diagram of an electronic key system according to the first embodiment Same as above, explanatory diagram showing an electronic key system applied to a vehicle Same as above, a flowchart showing a notification control routine that prompts the user to perform a specific action Same as above, flow chart showing the radio wave transmission permission determination routine for the in-vehicle device Same as above, flow chart showing a motion collation routine for the user's motion Same as above, flow chart showing the radio wave transmission control routine for the in-vehicle device Same as above, flowchart showing unlock determination routine Same as above, explanatory diagram illustrating waveforms associated with the user's motion Same as above, flowchart showing the process from when the user approaches the vehicle until the vehicle is unlocked Flowchart showing a motion matching routine for a user's motion according to the second embodiment Same as above, flow chart showing the radio wave transmission control routine for the in-vehicle device Same as above, flowchart showing unlock determination routine Schematic configuration diagram of an electronic key system according to the third embodiment Same as above, flow chart showing the radio wave transmission control routine for the in-vehicle device Same as above, flowchart showing unlock determination routine Schematic configuration diagram of an electronic key system according to a modification Same as above, explanatory diagram showing an electronic key system applied to a vehicle

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 9 relate to a first embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of an electronic key system.

The electronic key system 1 shown in FIG. 4 and .

The portable device 2 is configured by, for example, a smart phone or a dedicated electronic key. The portable device 2 includes a radio wave receiving section 21 , a notification section 22 , a motion sensor 23 , a portable device control section 24 and a radio wave transmitting section 25 .

The radio wave receiving unit 21 is configured by, for example, a receiver for receiving an LF signal (Low Frequency signal). The radio wave receiving unit 21 receives a polling signal or the like modulated into an LF signal by the vehicle-mounted device 3 within a communication range with the vehicle-mounted device 3 . Then, the radio wave receiving section 21 demodulates the received polling signal or the like and outputs it to the notification section 22 and the portable device control section 24 .

The notification unit 22 has a vibrator, a speaker, etc. (not shown). The notification unit 22 generates vibration or sound through a vibrator, a speaker, or the like when a polling signal is input from the radio wave reception unit 21 . Thereby, the notification unit 22 notifies the user that the portable device 2 has entered the communication range of the vehicle-mounted device 3 .

The motion sensor 23 includes an acceleration sensor, a gyro sensor, and the like. The motion sensor 23 detects vibrations or the like applied to the portable device 2 by the user as motion information. That is, the motion sensor 23 detects specific action information when the user carrying the portable device 2 intentionally performs a predetermined specific action on the portable device 2 . Further, the motion sensor 23 detects general action information transmitted to the portable device 2 when the user carrying the portable device 2 performs a general action other than the specific action.

Specifically, as the specific action performed by the user, for example, an action in which the user carrying the portable device 2 taps the portable device 2 a predetermined number of times in a predetermined rhythm. be. Further, as general actions performed by the user, actions that are not intentionally performed on the portable device 2, such as walking by the user holding the portable device 2, are assumed. The motion sensor 23 detects the vibration waveform input to the portable device 2 due to these specific actions and general actions as, for example, action waveform signals (specific action waveform signal and general action waveform signal). The motion sensor 23 then outputs the detected operating waveform signal to the portable device control section 24 . Thus, in this embodiment, the motion sensor 23 realizes the function of motion detection means.

For example, as shown in FIG. 8, the amplitude of the specific action waveform signal for specific actions such as tapping is basically greater than the amplitude of the general action waveform signal for general actions such as walking. Also, the wavelength of the specific operation waveform signal is basically shorter than the wavelength of the general operation waveform signal.

The portable device control unit 24 has a transmission permission determination unit 26, a waveform storage unit 27, and a waveform comparison unit 28, functionally speaking.

The polling signal from the radio wave receiving unit 21 and the operating waveform signal from the motion sensor 23 are input to the transmission permission determining unit 26 . The transmission permission determination unit 26 is turned on when the polling signal is input, and outputs a transmission permission signal to the radio wave transmission unit 25 . On the other hand, the transmission permission determination unit 26 is turned off when a set time elapses in a state in which no polling signal is input from the radio wave receiving unit 21 and no specific operation waveform signal is input, and cancels the output of the communication permission signal. do.

The determination as to whether or not the specific motion waveform signal has been input can be made, for example, by determining whether or not an motion waveform signal indicating an amplitude equal to or greater than a preset threshold value (see FIG. 8) has been input from the motion sensor 23. It is possible. Alternatively, it is possible to determine whether or not a specific motion waveform signal has been input, for example, by determining whether or not a motion waveform signal indicating a wavelength less than a preset threshold value has been input from the motion sensor 23 .

In the waveform storage unit 27, the owner or the like of the portable device 2 (the owner himself or his family, etc.) can register the specific motion information and the general motion information in advance. Specifically, in the waveform storage unit 27, the specific action waveform signal and the general action waveform signal obtained by the owner or the like performing the specific action and the general action in advance are registered as the specific action waveform signal (registered specific action information) and the general action waveform signal. It can be registered as a registered general operation waveform signal (registered general operation information). It should be noted that the registration of the registered operation waveform information in the waveform storage unit 27 can be performed by a dealer or the like for one or more persons.

The waveform collating section 28 collates the operating waveform signal input from the motion sensor 23 based on the information from the waveform storing section 27 . That is, for example, when an operation waveform signal having an amplitude equal to or greater than a preset threshold value (see FIG. 8) is input, the waveform matching unit 28 reads out the registered specific operation waveform signal from the waveform storage unit 27, and reads the input waveform signal. The read operation waveform signal is compared with the read registered specific operation waveform signal. When the operation waveform signal and the registered specific operation waveform signal match under a preset condition, the waveform collating unit 28 sends a key signal (identification information) preset in the portable device 2 to the radio wave transmitting unit. 25. That is, in the present embodiment, the key signal also serves as specific action matching completion information indicating that the specific action waveform signal matches the registered specific action waveform signal of the owner or the like.

On the other hand, for example, when a waveform signal having an amplitude less than a preset threshold is input, the waveform matching unit 28 reads out the registered general operation waveform signal from the waveform storage unit 27, and compares the input operation waveform signal with the readout waveform signal. Compare with the registered general operation waveform signal. When the operation waveform signal and the registered general operation waveform signal match under preset conditions, the waveform collating section 28 transmits a general operation collation completion signal preset in the portable device 2 to the radio wave transmitting section 25 . output to

Thus, in this embodiment, the waveform collating unit 28 realizes the functions of specific motion collating means and general motion collating means.

The radio wave transmission unit 25 is configured by, for example, a transmitter for transmitting an RF signal (Radio Frequency signal). When the key signal or the general operation verification completion signal is input from the waveform verification section 28, the radio wave transmission section 25 modulates the input signal under the condition that the communication permission signal is input from the transmission permission determination section 26. It outputs (transmits) an RF signal to the surroundings as appropriate.

The vehicle-mounted device 3 includes a radio wave transmitter 31 , a radio wave receiver 32 , and a vehicle-mounted device controller 33 .

The radio wave transmission unit 31 is composed of, for example, a transmitter for transmitting an LF signal. The radio wave transmission unit 31 repeatedly transmits an LF signal obtained by modulating a preset polling signal or the like at each set cycle. The reachable range of this LF signal is set to, for example, a radius of about 2 m from the vehicle-mounted device 3 (see two-dot chain line in FIG. 2).

The radio wave receiving unit 32 is configured by, for example, a receiver for receiving RF signals. The radio wave receiving unit 32 receives various signals such as a key signal modulated into an RF signal and an operation verification completion signal within the communication range of the portable device 2 . Then, the radio wave receiving section 32 demodulates the received various signals and outputs them to the vehicle-mounted device control section 33 .

The in-vehicle device control section 33 has a key collation section 34 and an unlock determination section 35 in functional terms.

A key signal from the radio wave receiving unit 32 is input to the key matching unit 34 . When a key signal is input from the radio wave receiving unit 32 , the key collating unit 34 collates the input key signal with registration key information (registration key signal) registered in the vehicle-mounted device 3 in advance. Then, the key collation unit 34 outputs a key collation completion signal to the unlock determination unit 35 when the input key signal and the registered key signal match. Thus, in the present embodiment, the key collating section 34 functions as key collating means.

Further, the key verification unit 34 also determines whether the portable device 2 is present inside the vehicle or outside the vehicle, based on, for example, the state of reception of radio waves by the radio wave receiving unit 32 . Then, the key collation unit 34 outputs, for example, a vehicle interior/exterior determination signal indicating whether the portable device 2 is present inside the vehicle or outside the vehicle to the unlock determination unit 35 .

The unlock determination unit 35 receives the operation verification completion signal from the radio wave reception unit 32 and the key verification completion signal and the vehicle interior/exterior determination signal from the key verification unit 34 . Further, an unlock request signal (described later) is input from the door unit 4 to the unlock determination unit 35 .

Then, the unlock determination unit 35 receives input of the key verification completion signal, input of the vehicle interior/exterior determination signal indicating that the portable device 2 is outside the vehicle, and input of the operation verification completion signal. As a condition, it is determined that unlocking of the door is permitted. Further, the unlock determination unit 35 receives an unlock request signal (described later) from the door unit 4 during the period from when the door unlock permission is determined until the set time elapses. At this time, an unlock instruction signal is output to the door unit 4 . Thus, in the present embodiment, the unlock determination section 35 has a function as unlock permitting means.

A door unit 4 is provided for each door of the vehicle 10 . The door unit 4 includes a touch sensor 41 and a door lock actuator 42 .

The touch sensor 41 is provided, for example, at a position adjacent to the door handle of the vehicle 10, or on the back side of the door handle. Then, the touch sensor 41 outputs a predetermined unlock request signal to the unlock determination section 35 when the touch sensor 41 is touched by a user or the like.

In the present embodiment, the touch sensor 41 is limited to, for example, only the front door on the driver's seat side, or only the front door and the back door on the driver's seat side, out of the door units 4 provided on each door. Although it is provided in the door unit 4 of another door, it can also be provided in the door unit 4 of another door. As the switches and sensors provided in the door unit 4, instead of the touch sensor 41, for example, a switch that outputs an unlock request signal when pressed by the user can be used.

The door lock actuator 42 is an actuator for locking (locking) and unlocking (unlocking) the doors of the vehicle 10 . The door lock actuator 42 unlocks the door when an unlock instruction signal is input from the unlock determination section 35 of the vehicle-mounted device 3 .

Next, notification control in the notification unit 22 of the portable device 2 will be described according to the flowchart of the notification control routine shown in FIG. This routine starts when the portable device 2 moves from outside the communication range of the vehicle-mounted device 3 to within the communication range, and a polling signal is input from the radio wave receiving section 21 to the notification section 22 .

When the routine starts, the notification unit 22 outputs a notification to the user in step S101. That is, the notification unit 22 notifies the user that the portable device 2 has entered the communication range with the vehicle-mounted device 3 by, for example, vibrating a vibrator or outputting a notification sound through a speaker.

In subsequent step S<b>102 , the notification unit 22 checks whether or not a polling signal is periodically input from the radio wave reception unit 21 . That is, the notification unit 22 checks whether the radio wave reception unit 21 receives the polling signal periodically transmitted from the radio wave transmission unit 31 of the vehicle-mounted device 3 .

Then, in step S102, when it is determined that the polling signal is being input periodically, the notification unit 22 stands by as it is.

On the other hand, if it is determined in step S102 that the polling signal has not been input periodically, the notification section 22 terminates the routine.

With such control, the notification unit 22 can notify the user only immediately after the portable device 2 enters the communication range with the vehicle-mounted device 3 . Therefore, it is possible to prevent the notification from being repeated while the mobile device 2 is within the communication range with the vehicle-mounted device 3, and to reduce the annoyance of the user.

Next, the determination of radio wave transmission permission in the transmission permission determination unit 26 of the portable device 2 will be described with reference to the flowchart of the radio wave transmission permission determination routine shown in FIG. This routine starts when the portable device 2 moves from outside the communication range of the vehicle-mounted device 3 to within the communication range, and a polling signal is input from the radio wave receiving section 21 to the transmission permission determination section 26 .

When the routine starts, the transmission permission determination unit 26 turns on the transmission permission signal in step S201. That is, in step S<b>201 , the transmission permission determination unit 26 starts outputting a transmission permission signal to the radio wave transmission unit 25 on condition that the portable device 2 has entered the communication range of the vehicle-mounted device 3 .

In subsequent step S202, the transmission permission determination unit 26 checks whether or not a polling signal is periodically input from the radio wave reception unit 21. FIG. That is, the transmission permission determination unit 26 determines whether the radio wave receiving unit 21 receives a polling signal periodically transmitted from the radio wave transmitting unit 31 of the in-vehicle device 3, and determines whether the portable device 2 can communicate with the in-vehicle device 3. Check to see if you stay within range.

Then, if it is determined in step S202 that the polling signal is being input periodically, the transmission permission determining section 26 stands by. As a result, the transmission permission determination unit 26 keeps outputting the transmission permission signal to the radio wave transmission unit 25 .

On the other hand, if it is determined in step S202 that the polling signal has not been input periodically, the transmission permission determining section 26 proceeds to step S203.

When the process proceeds from step S202 to step S203, the transmission permission determination unit 26 checks whether or not the specific motion waveform signal is input from the motion sensor 23. FIG. That is, in step S203, the transmission permission determination unit 26 checks whether or not an operation waveform signal is being input from the motion sensor 23 at present. Furthermore, when the operating waveform signal is input, the transmission permission determining unit 26 checks whether the amplitude of the operating waveform signal is equal to or greater than a preset threshold, for example.

Then, if it is determined in step S203 that the specific operation waveform signal is currently being input, the transmission permission determining section 26 returns to step S202. That is, if it is determined in step S203 that the operating waveform signal is currently being input and that the amplitude of the operating waveform signal is equal to or greater than the preset threshold value, the transmission permission determination unit 26 performs step Return to S202. As a result, the transmission permission determination unit 26 keeps outputting the transmission permission signal to the radio wave transmission unit 25 .

On the other hand, if it is determined in step S203 that the specific operation waveform signal is not currently input, the transmission permission determining section 26 proceeds to step S204. That is, if it is determined in step S203 that no operation waveform signal is currently being input, or if an operation waveform signal is currently being input but the amplitude of the operation waveform signal is less than a preset threshold value, If determined, the transmission permission determining unit 26 proceeds to step S204.

When the process proceeds from step S203 to step S204, the transmission permission determination unit 26 determines whether or not a preset time has elapsed since the periodic polling signal was no longer input and the specific operation waveform signal was no longer input. to examine.

Then, if it is determined in step S204 that the set time has not yet passed, the transmission permission determination unit 26 returns to step S202. As a result, the transmission permission determination unit 26 keeps outputting the transmission permission signal to the radio wave transmission unit 25 .

On the other hand, if it is determined in step S204 that the set time has elapsed, the transmission permission determination unit 26 proceeds to step S205, turns off the transmission permission signal, and then ends the routine. That is, in step S205, the transmission permission determination unit 26 cancels the output of the transmission permission signal to the radio wave transmission unit 25, and then ends the routine.

As described above, in the present embodiment, the portable device 2 includes the transmission permission determination unit 26, and mainly when the portable device 2 exists within the communication range with the vehicle-mounted device 3, the radio wave transmission unit 25 is permitted to transmit. . Therefore, unnecessary radio wave output from the radio wave transmitting unit 25 can be suppressed, and consumption of the battery of the portable device 2 can be effectively suppressed.

Next, motion collation in the waveform collating unit 28 will be described according to the flow chart of the motion collating routine shown in FIG. This routine starts when a specific motion waveform signal is input from the motion sensor 23, for example.

When the routine starts, the waveform collating section 28 checks in step S301 whether the polling signal from the radio wave receiving section 21 is currently being input periodically.

Then, if it is determined in step S301 that the polling signal is not currently being input periodically, the waveform collating section 28 ends the routine as it is.

On the other hand, if it is determined in step S301 that the polling signal is currently being input periodically, the waveform collating section 28 proceeds to step S302 to collate the specific operation waveform. That is, the waveform matching unit 28 reads the registered specific action waveform signal from the waveform storage unit 27, and compares the specific action waveform signal input from the motion sensor 23 with the read registered specific action waveform signal. When registered specific waveform signals relating to a plurality of users or the like are registered in the waveform storage unit 27, the waveform matching unit 28 reads all the registered specific waveform signals and extracts the specific operation waveform signals input from the motion sensor 23. and all the read registered specific waveform signals are compared.

When the process proceeds from step S302 to step S303, the waveform collating unit 28 refers to the collation result of step S302 to determine whether the specific operation waveform signal and any registered specific waveform signal match within a predetermined error range. to examine.

If it is determined in step S303 that the specific action waveform signal does not match any of the registered specific action waveform signals, the waveform matching section 28 ends the routine.

On the other hand, if it is determined in step S303 that the specific action waveform signal matches any of the registered specific action waveform signals, the waveform collating section 28 proceeds to step S304 to send the radio wave transmitting section 25 to the portable device 2 key signal is output, the process proceeds to step S305. That is, the waveform collating unit 28 transmits a specific key signal pre-registered in the portable device 2 to the radio wave transmitting unit 25 instead of the specific operation collating completion signal indicating that the specific operation waveform signal matches the registered specific waveform signal. output to

When proceeding from step S304 to step S305, the waveform collating unit 28 checks whether the polling signal from the radio wave receiving unit 21 is currently being input periodically.

Then, if it is determined in step S305 that the polling signal is not currently being input periodically, the waveform collating section 28 ends the routine as it is.

On the other hand, if it is determined in step S305 that the polling signal is currently being input periodically, the waveform collating unit 28 proceeds to step S306, and waits for the set time from the start of this routine due to the input of the specific operation waveform signal. Checks whether or not has elapsed.

Then, if it is determined in step S306 that the set time has elapsed since the start of this routine, the waveform collating section 28 ends the routine as it is. Here, the case where a sufficient amount of time has elapsed since the specific operation waveform signal was input means, for example, that the user who performed the specific operation on the portable device 2 within the communication range with the vehicle-mounted device 3 It is conceivable that the train timed out due to lack of motivation to board the train. Alternatively, it is conceivable that the user accidentally performed a specific action on the portable device 2 placed on a table or the like, for example, within the communication range with the vehicle-mounted device 3 . Alternatively, it is conceivable that the user performed a specific operation outside the range of communication with the vehicle-mounted device 3, for example, at the timing of being relay-attacked by a third party.

On the other hand, if it is determined in step S306 that the set time has not elapsed since the start of this routine, the waveform collating section 28 proceeds to step S307 to collate the general operation waveform. That is, the waveform matching section 28 reads the registered general operation waveform signal from the waveform storage section 27 . Then, when the general operation waveform signal is input from the motion sensor 23, the waveform collating section 28 collates the general operation waveform signal with the read registered general operation waveform signal. In this case, it is desirable that the waveform collating unit 28 reads out only the registered general motion waveform signal of the user, etc., corresponding to the specific motion waveform signal currently determined to match.

When proceeding from step S307 to step S308, the waveform matching unit 28 refers to the matching result of step S307 to check whether the general operation waveform signal and the registered general operation waveform signal match within a predetermined error range. .

Then, when it is determined in step S308 that the general operation waveform signal does not match the registered general operation waveform signal, the waveform matching section 28 returns to step S305.

On the other hand, if it is determined in step S308 that the general operation waveform signal matches the registered general operation waveform signal, the waveform collating section 28 proceeds to step S309 and transmits a general operation collation completion signal to the radio wave transmitting section 25. After outputting, exit the routine.

Thus, in the present embodiment, the general operation waveform signal and the registered general operation waveform signal are not compared until the specific operation waveform signal matches the registered specific operation waveform signal. Therefore, it is possible to reduce the calculation load for waveform collation in the portable device 2, and to suppress consumption of the battery of the portable device 2. FIG.

Further, when registered specific action waveform signals and registered general action waveform signals for a plurality of users or the like are registered in the waveform storage unit 27, the waveform matching unit 28 selects registered specific action waveform signals for which the specific action waveform signals match. Only the registered general operation waveform signal corresponding to the waveform signal is read, and only the read registered general operation waveform signal is checked against the general operation waveform signal. Therefore, it is possible to reduce the computational load for waveform collation in the portable device, and to suppress consumption of the battery of the portable device 2 .

Further, for example, when the verification of the specific motion waveform is completed, the waveform verification section 28 outputs a key signal instead of the specific motion verification completion signal to the radio wave transmission section 25 . Therefore, it is not necessary to separately transmit the specific operation matching completion signal and the key signal in the radio wave transmission section 25, which will be described later, and it is possible to suppress the consumption of the battery of the portable device 2 due to radio wave transmission.

Next, the radio wave transmission control in the radio wave transmission section 25 will be described according to the flowchart of the radio wave transmission control routine shown in FIG. This routine starts when a transmission permission signal is input from the transmission permission determination unit 26, for example.

When the routine starts, the radio wave transmitting section 25 checks in step S401 whether or not the transmission permission signal is still being input.

Then, if it is determined in step S401 that the transmission permission signal has not been input, the radio wave transmission section 25 ends the routine as it is.

On the other hand, if it is determined in step S401 that the transmission permission signal is being input, the radio wave transmitting section 25 proceeds to step S402 and checks whether or not a key signal has been input from the waveform matching section .

If it is determined in step S402 that the key signal has not been input, the radio wave transmitting section 25 returns to step S401.

On the other hand, if it is determined in step S402 that a key signal has been input, the radio wave transmitting section 25 proceeds to step S403, transmits the input key signal, and then proceeds to step S404. That is, the radio wave transmission unit 25 modulates the key signal into an RF signal and transmits the modulated key signal.

When the process proceeds from step S403 to step S404, the radio wave transmitting section 25 checks whether or not the transmission permission signal is still being input.

Then, if it is determined in step S404 that the transmission permission signal has not been input, the radio wave transmission section 25 ends the routine as it is.

On the other hand, if it is determined in step S404 that the transmission permission signal is being input, the radio wave transmitting section 25 advances to step S405 to check whether or not the general operation verification completion signal has been input from the waveform verification section .

Then, if it is determined in step S405 that the general operation verification completion signal has not been input, the radio wave transmitting section 25 returns to step S404.

On the other hand, if it is determined in step S405 that the general operation verification completion signal has been input, the radio wave transmitting section 25 proceeds to step S406, transmits the general operation verification completion signal, and then ends the routine. That is, the radio wave transmitting section 25 modulates the general operation verification completion signal into an RF signal, and transmits the modulated general operation verification completion signal.

As described above, in the present embodiment, the radio wave transmission section 25 transmits various signals on condition that the transmission permission signal from the transmission permission determination section 26 is being input. Therefore, power consumption due to radio wave transmission can be suppressed, and consumption of the battery of the portable device 2 can be suppressed.

Next, the unlock determination in the vehicle-mounted device control unit 33 of the vehicle-mounted device 3 will be described according to the unlock determination routine shown in FIG. This routine starts when a key signal is input from the radio wave receiving section 32, for example.

When the routine starts, the in-vehicle device control section 33 checks in step S501 whether or not the portable device 2 exists outside the vehicle.

Then, in step S501, when it is determined that the portable device 2 is present in the vehicle interior, the vehicle-mounted device control section 33 ends the routine as it is. Although detailed description is omitted, when the portable device 2 is present in the vehicle interior, the vehicle-mounted device control unit 33 makes a separate unlock determination.

On the other hand, if it is determined in step S501 that the portable device 2 exists outside the vehicle, the vehicle-mounted device control unit 33 proceeds to step S502, where the key signal received from the portable device 2 is registered in the vehicle-mounted device 3 in advance. Check if it matches the key signal. That is, in step S502, the vehicle-mounted device control unit 33 confirms whether or not the mobile device 2 is associated with the vehicle-mounted device 3 of the vehicle 10 based on the key signal received from the mobile device 2. do. Further, the in-vehicle device control unit 33 ensures that the specific action signal detected by the portable device 2 matches the registered specific action signal pre-registered in the portable device 2 by the user based on the input of the key signal. indirectly confirm that

Then, if it is determined in step S502 that the key signals do not match, the in-vehicle device control section 33 proceeds to step S506, determines that door unlocking is not permitted, and then terminates the routine. do.

On the other hand, if it is determined in step S502 that the key signals match, the in-vehicle device control section 33 proceeds to step S503 and checks whether or not the set time has passed since the key signal was received.

Then, if it is determined in step S503 that the set time has passed since the key signal was received, the vehicle-mounted device control section 33 proceeds to step S506 to determine that unlocking of the door is not permitted. After doing so, exit the routine. That is, if the general operation verification completion signal, which will be described later, is not received within the set time after the key signal is received, the vehicle-mounted device control unit 33 detects that a third party who has stolen the portable device 2 It is determined that there is a possibility that the portable device 2 has performed a specific operation by spoofing, and it is determined that unlocking of the door is not permitted.

On the other hand, if it is determined in step S503 that the set time has not passed since the key signal was received, the vehicle-mounted device control unit 33 proceeds to step S504, and the radio wave receiving unit 32 receives the general operation verification completion signal. Check whether or not That is, in step S504, the vehicle-mounted device control unit 33 determines whether or not the general operation signal detected by the portable device 2 matches the registered general operation signal registered in advance by the user. to confirm.

Then, if it is determined in step S504 that the general operation verification completion signal has not been received, the vehicle-mounted device control section 33 returns to step S503. That is, in the portable device 2, if the general operation signal has not yet been detected, or if the detected general operation signal does not match the registered general operation signal, the on-vehicle device control unit 33 starts from step S504. Return to step S503.

On the other hand, if it is determined in step S504 that the general operation verification completion signal has been received, the in-vehicle device control section 33 advances to step S505 to determine that unlocking of the door is permitted, and then terminates the routine. .

As a result, the unlock determination unit 35, on the condition that a touch sensor signal is input from the touch sensor 41 of the door unit 4 within the set time after determination to permit unlocking, An unlock instruction signal is output to the door lock actuator 42 . When this unlock instruction signal is input, the door lock actuator 42 unlocks the door.

By these controls, the door lock actuator 42 of the door unit 4 is unlocked by the following procedure, as shown in FIG. 9, for example.

First, when the user carrying the portable device 2 approaches the vehicle 10 and the portable device 2 enters the communication range of the vehicle 10 with the vehicle-mounted device 3, the portable device 2 is periodically transmitted from the vehicle-mounted device 3. A polling signal is received, and a notification for prompting the user to perform a specific operation is sent through the notification unit 22 (see S31, S10, S21, and S32 in FIG. 9).

When the user gives a predetermined specific action to the portable device 2 in response to the notification from the portable device 2, the portable device 2 recognizes and collates the specific action and permits communication on the portable device 2 side. . As a result, the radio wave communication on the side of the portable device 2 is turned on, and the key information is transmitted to the vehicle-mounted device 3 (see S33, S22, and S23 in FIG. 9).

When the vehicle-mounted device 3 receives the key signal from the portable device 2, the vehicle-mounted device 3 recognizes that the portable device 2 is near the vehicle 10, and compares the received key signal with the registered key signal (Fig. 9 S11 and S12).

Further, when the user starts walking toward the vehicle 10 after giving the portable device 2 a predetermined specific action, the portable device 2 measures (detects) the general action waveform and detects the measured general action waveform. are extracted and compared with the registered general operation waveform signal (see S24 and S25 in FIG. 9). Then, when collation of the general operation waveform is completed, the portable device 2 transmits a general operation collation completion signal to the vehicle-mounted device 3 (see S26 in FIG. 9).

When the in-vehicle device 3 receives the general operation verification completion signal from the portable device 2 and recognizes that the key verification and the general operation verification are completed, the door lock actuator is operated on the condition that the user touches the touch sensor 41. 42 (see S13, S35 and S14 in FIG. 9).

According to such an embodiment, in the portable device 2, the specific action signal when the user intentionally performs the specific action and the general action signal when the user performs a general action other than the specific action are detected and detected in advance. The registered specific operation signal is compared with the detected specific operation signal, and the registered general operation signal registered in advance is compared with the detected registered general operation signal. It was confirmed that the key signal received by communication matches the registered key signal registered in advance, the specific action signal matches the registered specific action signal, and the general action signal matches the registered general action signal. By permitting the unlocking of the door unit 4, sufficient security can be ensured without impairing convenience.

That is, not only the verification result of the specific action signal resulting from the intentional specific action such as tapping the portable device 2, but also the general action signal resulting from the general action such as walking of the user holding the portable device 2. The verification result is checked, and unlocking is not permitted if at least one of the results does not match. Therefore, sufficient security can be ensured against theft of the portable device 2 and so-called relay attacks.

In this case, the general operation signal to be collated by the portable device 2 is not given intentionally by the user to the portable device 2, but by the user entering the communication range with the vehicle-mounted device 3. It is caused by general actions such as walking performed before reaching the target. Therefore, the user can be authenticated without forcing the user to perform a plurality of troublesome intentional actions, and security can be ensured while maintaining high convenience.

Next, FIGS. 10 to 12 relate to the second embodiment of the present invention, FIG. 10 is a flow chart showing a motion matching routine for user's motion, and FIG. 11 is a flow chart showing a radio wave transmission control routine for an in-vehicle device. and FIG. 12 is a flow chart showing an unlock determination routine. Here, in the above-described first embodiment, the verification of the general action is performed after the verification of the specific action is completed, whereas in the present embodiment, the verification of the specific action and the verification of the general action are performed regardless of the order. The main difference is that It should be noted that the description of the same configuration, action, etc. as in the above-described first embodiment will be omitted as appropriate.

First, the motion matching in the waveform matching unit 28 will be described according to the flowchart of the motion matching routine shown in FIG. This routine starts when a polling signal is input from the radio wave receiving unit 21, for example.

When the routine starts, the waveform collating section 28 checks in step S601 whether or not the polling signal from the radio wave receiving section 21 is currently being input periodically.

Then, in step S601, if it is determined that the polling signal is not currently being input periodically, the waveform collating section 28 ends the routine as it is.

On the other hand, if it is determined in step S601 that the polling signal is currently being input periodically, the waveform collating section 28 proceeds to step S602 to collate the specific operation waveform. That is, when the specific action waveform signal is input from the motion sensor 23 , the waveform matching section 28 reads out the registered specific action waveform signal from the waveform storage section 27 . Then, the waveform collating section 28 collates the input specific operation waveform signal with the read registered specific operation waveform signal. When registered specific waveform signals relating to a plurality of users are registered in the waveform storage unit 27, the waveform matching unit 28 reads out all the registered specific waveform signals and extracts the specific operation waveform signals input from the motion sensor 23. and all the read registered specific waveform signals are compared. In this case, in the process of step S605, which will be described later, if a collation result indicating that the general operation waveform signal and the registered general operation waveform signal match has already been obtained, the waveform collating unit 28 determines that the registered general operation waveform Only the registered specific action waveform signal related to the user corresponding to the signal is read out and compared with the specific action waveform signal.

When proceeding from step S602 to step S603, the waveform collating unit 28 refers to the collation result of step S602 to determine whether the specific operation waveform signal and any registered specific waveform signal match within a predetermined error range. to examine.

If it is determined in step S603 that the specific action waveform signal does not match any of the registered specific action waveform signals, the waveform matching section 28 proceeds to step S605.

On the other hand, if it is determined in step S603 that the specific action waveform signal matches any of the registered specific action waveform signals, the waveform collating section 28 advances to step S604 to transmit the radio wave transmitting section 25 to the portable device 2 key signal is output, the process proceeds to step S605. That is, the waveform collating unit 28 transmits a specific key signal pre-registered in the portable device 2 to the radio wave transmitting unit 25 instead of the specific operation collating completion signal indicating that the specific operation waveform signal matches the registered specific waveform signal. output to

When proceeding from step S603 or step S604 to step S605, the waveform collating unit 28 collates the general operation waveform. That is, when the general operation waveform signal is input from the motion sensor 23 , the waveform matching section 28 reads out the registered general operation waveform signal from the waveform storage section 27 . Then, the waveform collating unit 28 collates the input general operation waveform signal with the read registered general operation waveform signal. When registered general waveform signals relating to a plurality of users are registered in the waveform storage unit 27, the waveform matching unit 28 reads all the registered general waveform signals and and all the registered general waveform signals read out are collated with each other. In this case, in the above-described processing of step S602, if a matching result has already been obtained to the effect that the specific action waveform signal and the registered specific action waveform signal match, the waveform matching section 28 determines that the registered specific action waveform Only the registered general operation waveform signal related to the user corresponding to the signal is read out and compared with the general operation waveform signal.

When proceeding from step S605 to step S606, the waveform matching unit 28 refers to the matching result of step S605 to determine whether the general operating waveform signal and any registered general waveform signal match within a predetermined error range. to examine.

If it is determined in step S607 that the general operation waveform signal does not match any of the registered general operation waveform signals, the waveform matching section 28 proceeds to step S609.

On the other hand, if it is determined in step S607 that the general operation waveform signal matches any of the registered general operation waveform signals, the waveform collating section 28 proceeds to step S608 and instructs the radio wave transmitting section 25 to perform general operation collation. After outputting the completion signal, the process proceeds to step S609.

When proceeding from step S607 or step S608 to step S609, the waveform collating unit 28 determines whether or not all signals have been output, that is, whether the output of the key signal and the general operation collating completion signal to the radio wave transmitting unit 25 has been completed. Check whether or not

Then, if it is determined in step S609 that all the signals have not been output, the waveform collating section 28 returns to step S601.

On the other hand, if it is determined in step S609 that all signals have been output, the waveform collating section 28 terminates the routine.

Next, the radio wave transmission control in the radio wave transmitting section 25 will be described according to the flowchart of the radio wave transmission control routine shown in FIG. This routine starts when a transmission permission signal is input from the transmission permission determination unit 26, for example.

When the routine starts, the radio wave transmitting section 25 checks in step S701 whether or not the transmission permission signal is still being input.

Then, if it is determined in step S701 that the transmission permission signal has not been input, the radio wave transmission section 25 ends the routine as it is.

On the other hand, if it is determined in step S701 that a transmission permission signal is being input, the radio wave transmitting section 25 advances to step S702 to check whether or not a key signal has been input from the waveform matching section .

If it is determined in step S702 that a key signal has been input, the radio wave transmitting section 25 proceeds to step S303, transmits the input key signal, and then proceeds to step S704. That is, the radio wave transmission unit 25 modulates the key signal into an RF signal and transmits the modulated key signal.

On the other hand, if it is determined in step S702 that the key signal has not been input, the radio wave transmitting section 25 directly proceeds to step S704.

When proceeding from step S702 or step S703 to step S704, the radio wave transmitting section 25 checks whether or not a general operation verification completion signal has been input from the waveform verification section .

If it is determined in step S704 that the general action verification completion signal has been input, the radio wave transmitting section 25 proceeds to step S705, transmits the input general action verification completion signal, and then proceeds to step S706. That is, the radio wave transmitting section 25 modulates the general operation verification completion signal into an RF signal, and transmits the modulated general operation verification completion signal.

On the other hand, if it is determined in step S704 that the general operation verification completion signal has not been input, the radio wave transmitting section 25 directly proceeds to step S706.

When proceeding from step S704 or step S705 to step S706, the radio wave transmitting unit 25 checks whether or not all signals have been transmitted, that is, whether or not transmission of the key signal and general operation verification completion signal has been completed.

Then, if it is determined in step S706 that all the signals have not been transmitted, the radio wave transmitting section 25 returns to step S701.

On the other hand, if it is determined in step S706 that all signals have been transmitted, the radio wave transmitting section 25 ends the routine.

Next, the unlock determination in the vehicle-mounted device control unit 33 of the vehicle-mounted device 3 will be described according to the unlock determination routine shown in FIG. This routine starts, for example, when the radio wave receiving section 32 receives radio waves from the portable device 2 . That is, in the present embodiment, this routine is started when, for example, a key signal or a general operation verification completion signal received by the radio wave receiving section 32 from the portable device 2 is input to the vehicle-mounted device control section 33 .

When the routine starts, the in-vehicle device control section 33 checks in step S801 whether or not the portable device 2 exists outside the vehicle.

Then, in step S801, when it is determined that the portable device 2 is present in the vehicle interior, the vehicle-mounted device control section 33 ends the routine as it is. Although detailed description is omitted, when the portable device 2 is present in the vehicle interior, the vehicle-mounted device control unit 33 makes a separate unlock determination.

On the other hand, if it is determined in step S801 that the portable device 2 exists outside the vehicle, the vehicle-mounted device control unit 33 proceeds to step S802 to determine whether all signals have been input. It checks whether the reception of the signal and the general operation verification complete signal has been completed.

Then, when it is determined in step S802 that all signals have been input, the in-vehicle device control section 33 proceeds to step S804.

On the other hand, if it is determined in step S802 that all the signals have not been input, the in-vehicle device control section 33 proceeds to step S803 to determine whether a preset time has elapsed since the start of this routine. to examine.

Then, if it is determined in step S803 that the set time has not elapsed, the vehicle-mounted device control section 33 returns to step S802 and waits until all signals are input.

On the other hand, if it is determined in step S803 that the set time has elapsed, the in-vehicle device control section 33 proceeds to step S806.

When proceeding from step S802 to step S804, the in-vehicle device control unit 33 checks whether or not the key signal matches a registered key signal registered in the in-vehicle device 3 in advance. That is, in step S804, the vehicle-mounted device control unit 33 confirms whether or not the mobile device 2 is the mobile device 2 associated with the vehicle-mounted device 3 of the vehicle 10 based on the key signal received from the mobile device 2. do. Further, based on the input of the key signal, the vehicle-mounted device control unit 33 combines the specific operation signal and the general operation signal detected by the portable device 2 with the registered specific operation signal pre-registered in the portable device 2 by the user. indirectly confirms that it matches

Then, if it is determined in step S804 that the key signals match, the in-vehicle device control section 33 advances to step S805, determines to permit unlocking of the door, and then terminates the routine.

On the other hand, if it is determined in step S804 that the key signals do not match, the in-vehicle device control section 33 proceeds to step S806.

When the process proceeds from step S803 or step S804 to step S806, the in-vehicle device control section 33 determines that door unlocking is not permitted, and then ends the routine. One of the cases where the key signal is not input within the set time is, for example, when the user carrying the portable device 2 is walking away from the vehicle 10, and the like. It is assumed that the machine 2 is subjected to a so-called relay attack.

As a result, the unlock determination unit 35, on the condition that a touch sensor signal is input from the touch sensor 41 of the door unit 4 within the set time after determination to permit unlocking, An unlock instruction signal is output to the door lock actuator 42 . When this unlock instruction signal is input, the door lock actuator 42 unlocks the door.

According to such an embodiment, substantially the same effects as those of the above-described first embodiment can be obtained.

Next, FIGS. 13 to 15 relate to a third embodiment of the present invention, FIG. 13 is a schematic configuration diagram of an electronic key system, FIG. 14 is a flow chart showing a radio wave transmission control routine for an on-board device, and FIG. 4 is a flow chart showing a determination routine; Here, in the first and second embodiments described above, the specific action and the general action are collated in the portable device 2, but in the present embodiment, the specific action and the general action are collated in the in-vehicle device 3. The main differences are points. It should be noted that descriptions of the same configurations and functions as those of the first and second embodiments described above will be omitted as appropriate.

As shown in FIG. 13 , in the electronic key system 1 of the present embodiment, a waveform storage section 36 and a waveform matching section 37 are provided in the vehicle-mounted device control section 33 instead of the portable device control section 24 . Therefore, the operating waveform signal detected by the motion sensor 23 is directly input to the radio wave transmitting section 25 . The waveform storage unit 36 and waveform collation unit 37 have substantially the same functions as the waveform storage unit 27 and waveform collation unit 37 described in the first embodiment.

Next, the radio wave transmission control in the radio wave transmission section 25 will be described according to the flowchart of the radio wave transmission control routine shown in FIG. This routine starts when a transmission permission signal is input from the transmission permission determination unit 26, for example.

When the routine starts, the radio wave transmitting section 25 transmits a key signal pre-registered in the portable device 2 in step S901.

In subsequent step S902, the radio wave transmitting section 25 checks whether or not the transmission permission signal is being input from the transmission permission determining section 26 even now.

Then, if it is determined in step S902 that the transmission permission signal has not been input, the radio wave transmission section 25 ends the routine as it is.

On the other hand, if it is determined in step S902 that a transmission permission signal is being input, the radio wave transmitting section 25 advances to step S903 and checks whether an operation signal is being input from the motion sensor 23 or not.

Then, if it is determined in step S903 that the operation signal has not been input, the radio wave transmitting section 25 returns to step S902.

On the other hand, if it is determined in step S903 that an operation signal has been input, the radio wave transmission unit 25 proceeds to step S904, transmits the input operation signal, and then returns to step S902.

Next, the unlock determination in the vehicle-mounted device control unit 33 of the vehicle-mounted device 3 will be described according to the unlock determination routine shown in FIG. This routine starts, for example, when the radio wave receiving section 32 receives radio waves from the portable device 2 . That is, in the present embodiment, this routine is started when, for example, the key signal received by the radio wave receiving section 32 from the portable device 2 is input to the vehicle-mounted device control section 33 .

When the routine starts, the in-vehicle device control section 33 checks in step S1001 whether or not the portable device exists outside the vehicle.

Then, in step S1001, when it is determined that the portable device 2 is present in the vehicle compartment, the vehicle-mounted device control section 33 exits the routine as it is.

On the other hand, if it is determined in step S1001 that the portable device 2 exists outside the vehicle, the vehicle-mounted device control unit 33 determines whether the key signal matches a registered key signal registered in advance in the vehicle-mounted device 3 in step S1002. Check whether or not That is, in step S1002, the vehicle-mounted device control unit 33 confirms whether or not the mobile device 2 is associated with the vehicle-mounted device 3 of the vehicle 10 based on the key signal received from the mobile device 2. do.

If it is determined in step S1002 that the key signals do not match, the in-vehicle device control section 33 advances to step S1009 to determine that door unlocking is not permitted, and then terminates the routine. do.

On the other hand, if it is determined in step S1002 that the key signals match, the in-vehicle device control section 33 proceeds to step S1003 and performs operation waveform signal matching processing. That is, when the operation waveform signal is received from the portable device 2, the vehicle-mounted device control unit 33 reads out the registered specific operation waveform signal and the registered general operation waveform signal registered in advance in the waveform storage unit 36, and performs the received operation. Compare with waveform signal.

When proceeding from step S1003 to step S1004, the in-vehicle device control unit 33 refers to the result of the collation processing in step S1003 to check whether the specific action waveform signal matches the registered specific action waveform signal.

Then, when it is determined in step S1004 that the specific operation waveform signal matches the predetermined value, the in-vehicle device control section 33 proceeds to step S1006.

On the other hand, if it is determined in step S1004 that the specific operation waveform signal does not match the predetermined value, or if it is determined that the matching process in step S1003 was not the specific operation waveform signal matching process in the first place, the in-vehicle device control unit 33 goes to step S1005.

When proceeding from step S1004 to step S1005, the in-vehicle device control unit 33 refers to the result of the matching process in step S1003 to check whether the general operation waveform signal matches the registered general operation waveform signal.

Then, when it is determined in step S1005 that the general operation waveform signal matches the predetermined value, the in-vehicle device control section 33 proceeds to step S1006.

On the other hand, if it is determined in step S1005 that the general operation waveform signal does not match the predetermined value, or if it is determined that the collation processing in step S1003 was not the collation processing of the general operation waveform signal in the first place, the in-vehicle device control unit 33 returns to step S1003.

When proceeding from step S1004 or step S1005 to step S1006, the in-vehicle device control unit 33 determines whether or not all verification processing has been completed. It is checked whether or not the collation processing of is completed.

Then, if it is determined in step S1006 that all the verification processes have been completed, the vehicle-mounted device control unit 33 advances to step S1008 to determine that unlocking of the door is permitted, and then ends the routine. do.

On the other hand, if it is determined in step S1006 that all the collation processing has not yet been completed, the vehicle-mounted device control unit 33 proceeds to step S1007 to determine whether a preset time has elapsed since the start of this routine. Check whether or not

Then, if it is determined in step S1007 that the set time has not elapsed, the vehicle-mounted device control section 33 returns to step S1003.

On the other hand, if it is determined in step S1007 that the set time has elapsed, the vehicle-mounted device control unit 33 advances to step S1009 to determine that door unlocking is not permitted, and then ends the routine. .

According to such an embodiment, substantially the same effects as those of the above-described first and second embodiments can be obtained. In addition, in the present embodiment, since the verification of the specific action and the general action is performed on the vehicle-mounted device 3 side, consumption of the battery of the portable device 2 can be suppressed.

Here, in each of the above-described embodiments, in order to acquire the general operation waveform signal more accurately, the fact that the user carrying the portable device 2 approaches the vehicle 10 is detected by the radio wave transmitting unit 31 and the radio wave receiving unit. Before the user enters the communication range with 21, it is also possible to detect based on the position information by GPS or the like. In this case, for example, as shown in FIG. 16, a GPS receiver 29 and a relative position calculator 30 are added to the portable device 2 in addition to the configuration shown in FIG. 1 of the first embodiment.

The GPS receiver 29 measures the current position (absolute coordinates) of the portable device 2 by receiving positioning signals from a plurality of satellites. The current position of the portable device 2 measured in this way is output to the relative position calculator 30 .

The relative position calculator 30 calculates, for example, the relative distance between the vehicle 10 and the portable device 2 when the vehicle is stopped. Therefore, the relative position calculator 30 stores the current position measured by the GPS receiver 29 at the timing when the ignition switch of the vehicle 10 is turned off, as the position of the vehicle 10 (reference position).

Then, the relative position calculator 30 calculates the relative distance of the portable device 2 to the vehicle 10 based on the stored coordinates of the reference position and the coordinates of the current position of the portable device 2 measured by the GPS receiver 29. . That is, the relative position calculator 30 successively calculates the relative distance between the vehicle 10 after the ignition switch has been turned off and the user who got off the vehicle 10 (the user who carries the portable device 2).

Further, for example, after the ignition switch of the vehicle 10 is turned off, the relative position calculation unit 30 returns to When the distance becomes equal to or less than the set distance R0 (see FIG. 17), a signal corresponding to the polling signal is output to the notification section 22 and the waveform comparison section .

According to such a modified example, it is possible to secure a sufficient distance for acquiring the general motion waveform signal due to walking of the user or the like.

Here, in the above-described embodiment, the portable device control section 24 and the vehicle-mounted device control section 33 are composed of a well-known microcomputer equipped with CPU, RAM, ROM, non-volatile memory, etc., and peripheral devices thereof. In the ROM, programs to be executed by the CPU and fixed data such as data tables are stored in advance. All or part of the functions of the processor may be configured by logic circuits or analog circuits, and processing of various programs may be realized by electronic circuits such as FPGA.

The invention described in the above embodiments is not limited to those forms, and various modifications can be made at the stage of implementation without departing from the scope of the invention. For example, in each of the above-described embodiments, an example in which the electronic key system is applied to a vehicle has been described, but the present invention is not limited to this, and can be applied to houses and the like. For example, by applying the electronic key system to the entrance or back door of a house, it is possible to prevent house break-ins using relay attacks and improve security. Furthermore, security measures using such an electronic key system can realize security measures that are less expensive and less troublesome than a theft system using a security camera or the like.

For example, in each of the above-described embodiments, an example of a configuration in which the radio wave transmission unit of the portable device transmits the RF signal and the radio wave transmission unit of the in-vehicle device transmits the LF signal has been described. Signals are not limited to these, and other signals can be used.

Furthermore, each of the above forms includes inventions at various stages, and various inventions can be extracted by appropriate combinations of the multiple disclosed constituent elements.

For example, even if some constituent elements are deleted from all the constituent elements shown in each form, if the stated problem can be solved and the stated effect can be obtained, this constituent element is deleted A configuration can be extracted as an invention.

DESCRIPTION OF SYMBOLS 1... Electronic key system 2... Portable device 3... Vehicle-mounted device 4... Door unit 10... Vehicle 21... Radio wave receiving unit 22... Notification unit 23... Motion sensor 24... Portable device control unit 25... Radio wave transmitting unit 26... Transmission permission determining unit 27 Waveform storage unit 28 Waveform comparison unit 29 GPS reception unit 30 Relative position calculation unit 31 Radio wave transmission unit 32 Radio wave reception unit 33 In-vehicle device control unit 34 Key verification unit 35 Unlock determination unit 36 Waveform storage unit 37 Waveform matching unit 41 Touch sensor 42 Door lock actuator

Claims (5)

A door unit provided to be locked, a portable device that can be carried by a user, and an installation device that is installed to the locked target and permits unlocking of the door unit based on the result of wireless communication with the portable device. and in an electronic key system comprising
specific action information provided in the portable device when the user carrying the portable device intentionally performs a specific action on the portable device; a motion detection means for detecting general motion information when performing a general motion other than the specific motion;
a key collating means provided in the installation machine for comparing registration key information pre-registered in the installation machine with key information transmitted from the portable machine;
specific action collation means for collating the specific action information registered in advance by the user with the specific action information;
general action collating means for collating the user's registered general action information registered in advance with the general action information;
When the key information matches the registered key information, the specific action information matches the registered specific action information, and the general action information matches the registered general action information, the door unit is unlocked. An electronic key system characterized by comprising unlocking permitting means for permitting. 2. The electronic key system according to claim 1, wherein said specific action collating means and said general action collating means are provided in said portable device. The general action collating means collates the registered general action information and the general action information after the specific action collating means determines that the registered specific action information and the specific action information match. 3. The electronic key system according to claim 2, characterized by: 4. The electronic device according to claim 1, wherein said specific motion information and said general motion information are waveform signals of vibrations generated in said portable device by said user's motion. key system. 5. The electronic key system according to claim 1, wherein the object to be locked is a vehicle.

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