JP2023033868A - Key system and user operation intention recognition method - Google Patents

Abstract

To provide a key system and a user operation intention awareness method that can detect operation intention of a user without additional parts.SOLUTION: In a key system 3, an operation target 1 is provided with one or more antennas 17 for short-range wireless communication. The key system 3 authenticates a terminal 2 by short-range wireless communication between the terminal 2 and the antennas 17. The monitoring part 35 of the key system 3 monitors the output attenuation of radio wave when the radio wave is transmitted from the antennas 17 provided on a member 36 that the user touches while using the operation target 1. The control part 37 of the key system 3 operates the operation target 1 by determining intention of the user to operate the operation target 1 from changes in the output attenuation of the radio wave based on the monitoring result of the monitoring part 35 .SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a key system and a user operation intention recognition method for wirelessly authenticating a terminal and activating an operation target.

Conventionally, an electronic key system that wirelessly authenticates an electronic key to operate a vehicle is well known (see Patent Document 1). This type of electronic key system includes, for example, a smart system that authenticates an electronic key (smart verification) when the electronic key receives radio waves from a vehicle. In the smart system, when smart verification is established, the vehicle door is locked/unlocked, for example, when the exterior door handle of the vehicle door is touch-operated.

JP 2008-106548 A

Incidentally, in recent years, a digital key system has been devised in which a digital key is delivered to a terminal such as a high-performance mobile phone through network communication so that the terminal can be used as a vehicle key. Many terminals are pre-equipped with a short-range wireless communication function such as Bluetooth (registered trademark). Therefore, in the digital key system, there is a high possibility that short-range wireless communication will be used for communication between the terminal and the vehicle.

In such a digital key system as well, there is a strong need to provide a function of locking and unlocking the vehicle door by a touch operation on the exterior door handle of the vehicle door, like the smart system. However, when this function is provided, if it is necessary to add new switches and sensors to the vehicle, there are problems such as the time and effort required to install parts and the need for extra parts costs. rice field.

A key system for solving the above problems is provided with one or more short-range wireless communication antennas for an operation target, and authenticates the terminal by the short-range wireless communication between the terminal and the antenna, and identifies the operation target. a monitoring unit for monitoring the output attenuation of the radio wave when the radio wave is transmitted from the antenna provided on the member touched by the user during the use of the operation target, and the monitoring of the monitoring unit. a control unit that determines a user's intention to operate the operation target from the change in the output attenuation of the radio wave based on the result, and activates the operation target.

A user operation intention recognition method for solving the above-mentioned problem is provided with one or more short-range wireless communication antennas for an operation target, and authenticating the terminal by the short-range wireless communication between the terminal and the antennas. A method used in a key system for actuating an operation object, wherein when a radio wave is transmitted from the antenna provided on a member that a user touches during the use of the operation object, the output attenuation of the radio wave is monitored. and determining the user's intention to operate the operation object from the change in the output attenuation of the radio wave based on the monitoring result of the output attenuation, and activating the operation object.

According to the present invention, the user's intention to operate can be detected without adding parts.

1 is a configuration diagram of a key system of one embodiment; FIG. FIG. 4 is a schematic diagram showing an example of antenna arrangement; FIG. 4 is a procedure diagram showing the flow of terminal authentication; FIG. 4 is a schematic diagram of the operation before the door handle is touched; FIG. 5 is a schematic diagram of the operation when the door handle is touched;

An embodiment of the present disclosure will be described below.
[Overall system configuration]
As shown in FIG. 1, a user's operation target 1 includes a key system 3 that authenticates a terminal 2 carried by the user and controls the operation of the operation target 1 . The key system 3 is preferably, for example, a digital key system 4 that registers a digital key Dk in the terminal 2 and uses the terminal 2 as a key for the operation target 1 . In this way, the key system 3 uses the terminal 2 as a key instead of the dedicated key for the operation object 1 to use the operation object 1 .

The operation target 1 is preferably a vehicle 5, for example. The vehicle 5 may be, for example, a personal vehicle owned by the user, or a sharing car shared by a plurality of people.

The terminal 2 is, for example, a multifunctional terminal mainly having a telephone function. Terminal 2 is preferably a high-performance mobile phone, for example. The digital key system 4 downloads the digital key Dk required for authentication from the outside (for example, a server) to the terminal 2 and enables the operation target 1 on the terminal 2 . In this way, the terminal 2 becomes the key of the operation target 1, that is, the vehicle key, by registering the digital key Dk from the outside. The digital key Dk is preferably, for example, a one-time key that is permitted to be used only once or for a certain period of time.

In the case of a personal vehicle, a digital key Dk containing usage information indicating that the vehicle 5 can be used freely is registered in the terminal 2 . In the case of a sharing car, a digital key Dk including reservation information input by the user when making a reservation for the vehicle 5 is registered in the terminal 2 .

The key system 3 authenticates the terminal 2 by near field communication. The short-range wireless communication may be either PAN (Personal Area Network) communication or close proximity wireless communication. Personal area network communication includes, for example, Bluetooth (registered trademark) communication, UWB (Ultra Wide Band) communication, and Wi-Fi (registered trademark) communication. Also, the Bluetooth communication is preferably BLE (Bluetooth Low Energy). Proximity wireless communication is a type of RFID, for example, NFC (Near Field Communication).

The terminal 2 includes a terminal control unit 7 that controls the operation of the terminal 2, a network module 8 that performs network communication, a communication module 9 that performs short-range wireless communication, a memory 10 that can store data, a terminal 2, and a display unit 12 for displaying a screen. The terminal 2 performs short-range wireless communication with the operation target 1 (vehicle 5 ) via the communication module 9 . The display unit 12 is preferably a touch panel, for example.

An application 13 necessary for operating the terminal 2 as a key of the operation object 1 is registered in the memory 10 of the terminal 2 . The application 13 is, for example, acquired through network communication from an external medium (for example, a server, etc.) and written and stored in the memory 10 . By registering the application 13 in the terminal 2, it is possible to download the digital key Dk to the terminal 2 and operate the operation target 1 on the terminal 2. FIG.

The digital key Dk is written and stored in the memory 10 of the terminal 2 . The terminal 2 preferably downloads the digital key Dk to the memory 10 by various methods such as download from a server, wireless acquisition from a master key, and image reading of code information. The digital key Dk may be downloaded to the terminal 2 from the outside, or may be written in advance at the time of shipment.

The key system 3 comprises a communicator 16 that performs authentication of the terminal 2 . The communication device 16 includes an antenna 17 (hereinafter referred to as main antenna 17A) that performs short-range wireless communication with the terminal 2 and an authentication unit 18 that authenticates the terminal 2 . The authentication unit 18 authenticates the terminal 2 by executing short-range wireless communication with the terminal 2 via the main antenna 17A. The communication device 16 may be, for example, a product pre-installed on the operation target 1 before shipment, or may be an item that can be retrofitted to the operation target 1 .

As shown in FIG. 2, the key system 3 has, for example, a plurality of antennas 17 for performing short-range wireless communication. In this way, the communication device 16 can perform short-range wireless communication with the terminal 2 using not only the main antenna 17A but also another antenna 17. FIG. In this example, three antennas 17 are provided on the vehicle body 5a in addition to the main antenna 17A. The antenna 17 of this example includes a first antenna 17L arranged on the right side of the vehicle body, a second antenna 17M arranged on the left side of the vehicle body, and a third antenna 17N arranged inside the vehicle. These antennas 17 may be of a type that performs communication simultaneously, or may be of a type that performs communication sequentially.

As shown in FIG. 1, the first antenna 17L is connected to the communication device 16 via the communication line 20a, the second antenna 17M is connected to the communication device 16 via the communication line 20b, and the third antenna 17N is connected to the communication line 20c. is connected to the communication device 16 via the . In this example, a predetermined antenna 17 (in this example, the first antenna 17L) among the first to third antennas 17L to 17N is mounted on a door handle 22 provided outside the vehicle. In this case, the first antenna 17L is preferably built inside the metal housing 23 of the door handle 22 .

The key system 3 includes a key system controller 27 that controls the on-board equipment 26 based on the authentication result of the authentication unit 18 of the communication device 16 . A key system control device 27 is provided on the operation target 1 . The key system control device 27 is connected to the on-board equipment 26 via a communication line 28 provided on the operation target 1 . The communication line 28 is preferably CAN (Controller Area Network) or LIN (Local Interconnect Network), for example. The on-board device 26 includes, for example, a door lock device that switches between locking and unlocking of vehicle doors, a steering lock device that can lock operation of the steering wheel, an engine control device that controls the engine, and the like.

The key system 3 has a position determination function (position determination system 31 ) for determining the position of the terminal 2 with respect to the operation target 1 . In the case of this example, the position determination function checks the state of communication between the terminal 2 and the multiple antennas 17 in addition to the state of communication between the communication device 16 and the terminal 2, thereby determining the position of the terminal with respect to the operation target 1. 2 position is determined. The key system control device 27 controls the operation of the onboard equipment 26 based on the authentication result of the authentication unit 18 and the position determination result of the position determination system 31 .

The position determination system 31 includes a measurement unit 32 that obtains a measurement value R related to the communication distance when each of the communication device 16 and the antenna 17 communicates with the terminal 2 by short-range wireless communication. The measurement unit 32 is provided in the terminal 2 (terminal control unit 7), for example. The measured value R is preferably a received signal strength indicator (RSSI) of radio waves communicated by short-range wireless communication. The measuring unit 32 obtains a measured value R for each of the communication device 16 and the antenna 17 performing short-range wireless communication, and transmits the measured measured value R to the antenna 17 of the communicating party in the process of communication. Each of the antennas 17 outputs data of the measured value R acquired from the terminal 2 to the communication device 16 together with its own antenna ID. The data of the measured value R is, for example, received signal strength data.

The position determination system 31 includes a position determination section 33 that determines the position of the terminal 2 using data of the measured value R measured by the measurement section 32 . In this example, the position determination unit 33 is provided in the communication device 16 . The position determination unit 33 determines the position of the terminal 2 with respect to the operation target 1 based on the magnitude relationship between the measured values R measured for each communication device 16 and antenna 17 . Specifically, it is preferable to determine whether the terminal 2 is located outside the vehicle on the driver's seat side, outside the vehicle on the passenger's seat side, or inside the vehicle.

[Configuration of smart operation function]
The key system 3 has a smart operation function that activates the operation target 1 when the operation target 1 is operated by the user. In the case of this example, the smart operation function is preferably a function of activating the operation target 1 when the door handle 22 is touched, for example. Specifically, the smart operation function is preferably a function of locking and unlocking the door 21 when a touch operation of the door handle 22 is detected.

In the case of this example, the key system 3 has a monitoring section 35 that monitors output attenuation of radio waves transmitted from the antenna 17 . In the case of this example, the monitoring unit 35 is provided in the communication device 16 . The monitoring unit 35 monitors the output attenuation of the radio wave when the radio wave is transmitted from the antenna 17 (the first antenna 17L in this example) provided on the member 36 that the user touches while using the operation target 1. . The member 36 on which the antenna 17 is arranged is preferably the door handle 22 provided on the door 21 of the operation target 1, for example. In this way, the monitoring unit 35 monitors the output attenuation of the radio waves of the first antenna 17L provided on the door handle 22 .

The key system 3 includes a control section 37 that operates the operation target 1 based on the monitoring result of the monitoring section 35 . In this example, the controller 37 is provided in the communication device 16 . Based on the monitoring results of the monitoring unit 35, the control unit 37 determines the user's intention to operate the operation target 1 from changes in the output attenuation of the radio wave, and activates the operation target 1. FIG. When the position determination unit 33 determines that the terminal 2 is located outside the room on the door handle 22 side of the operation object 1, the control unit 37 recognizes the touch operation on the door handle 22 based on the monitoring result, and the operation object 1 is preferably performed.

Next, the operation of the key system 3 (user operation intention recognition method) of this embodiment will be described.
[Authentication of terminal 2]
As shown in FIG. 3, in step 101, the communicator 16 periodically and repeatedly transmits Advertise for notifying information relating to its own communication. Advertise is, for example, a type of packet data, and is regularly transmitted from the communication device 16 at all times.

In step 102, the terminal 2, upon receiving the Advertise transmitted from the communication device 16, performs scanning processing. In addition, it is preferable that the terminal 2 starts scanning processing, for example, when the received signal strength at the time of receiving the Advertise reaches or exceeds a specified value. At this time, after the scanning process, the terminal 2 transmits a connection request to the communication device 16 as a request for providing details of the short-range wireless communication.

In step 103, after performing the above exchanges, the terminal 2 and the communication device 16 transition to a state in which short-range wireless communication is connected, that is, a state of communication connection.
In step 104, the terminal 2 and the communication device 16 authenticate the terminal 2 when the short-range wireless communication transitions to the communication connection state. In this example, for example, in response to a request from the communication device 16, the terminal 2 transmits the digital key Dk registered in the memory 10 to the communication device 16 by short-range wireless communication.

When the communication device 16 receives the digital key Dk from the terminal 2, the authentication unit 18 authenticates the digital key Dk. In the case of this example, the authentication unit 18 can decrypt the digital key Dk correctly, and when the authentication of the digital key Dk is established, for example, the usage information of the operation object 1 and the It is possible to acquire the reservation information that has been made, the session key that will be used in subsequent short-range wireless communication, the terminal ID that is a unique ID of the terminal 2, and the like. On the other hand, if the digital key Dk is not correct or the use start time included in the reservation information is not correct, the authentication unit 18 forcibly terminates the process and does not permit the use of the operation target 1 .

In step 105, when the digital key Dk is authenticated, the terminal 2 and the communication device 16 enter an authentication completion state in which they recognize that the authentication has been established. The authentication completed state is a state in which both the terminal 2 and the communication device 16 know a common session key and terminal ID. As a result, it is possible to use the operation target 1, specifically, lock/unlock the door 21 of the vehicle 5, unlock the steering lock device, and start the engine.

In step 106, the terminal 2 and the communication device 16 perform communication to confirm whether or not the short-range wireless communication is maintained after the transition to the authentication completed state. In this example, each of the terminal 2 and the communication device 16 transmits periodic radio waves St at predetermined periodic intervals (connection intervals), and confirms whether or not a response to the periodic radio waves St can be received. Monitor whether communication establishment is maintained. That is, if the terminal 2 transmits periodic radio waves St at predetermined periodic intervals and can receive a response to the periodic radio waves St, it is determined that the communication is maintained, and the communication device 16 also executes similar processing.

When the terminal 2 becomes unable to receive the response to the periodic radio wave St transmitted by itself from the communication device 16, the terminal 2 cuts off the communication. Further, when the communication device 16 cannot receive the response to the periodic radio wave St transmitted by itself from the terminal 2, the communication device 16 cuts off the communication.

Confirmation of whether or not there is a response to the periodic radio wave St is performed by each of the antennas 17 with which communication has been established with the terminal 2 . In the case of this example, if short-range wireless communication is established between the terminal 2 and the main antenna 17A, it is confirmed whether or not there is a response to the periodic radio wave St between them. Further, when short-range wireless communication is established between the terminal 2 and the first antenna 17L, the presence or absence of a response to the periodic radio wave St is confirmed between them, and similar processing is performed between the terminal 2 and the second antenna 17M. between terminal 2 and third antenna 17N.

The position determining unit 33 determines the position of the terminal 2 while the terminal 2 and the communication device 16 are performing short-range wireless communication. In this example, the position determination is preferably performed, for example, during periodic communication at connection intervals. Specifically, the terminal 2 measures the measured value R related to the communication distance of the periodic radio wave St transmitted at the connection interval interval during the short-range wireless communication, which is the received signal strength in this example, by the measuring unit 32. , returns the measured received signal strength data to the antenna 17 of the communication partner. The antenna 17 associates the received signal strength data with the antenna ID and outputs the data to the communication device 16 . This process is performed at each antenna 17 . The position determination unit 33 determines the position of the terminal 2 based on the received signal strength data acquired from each of the antennas 17 .

For example, if radio waves are transmitted from one antenna 17 a plurality of times, a characteristic value of the radio wave characteristic is obtained from a plurality of received signal strengths, and the position is determined based on this characteristic value. good too. Characteristic values in this case include various parameters such as average values, weighted averages, arithmetic averages, geometric averages, and harmonic averages. Further, radio waves used for position determination may be radio waves transmitted at any timing as long as they are radio waves exchanged between the terminal 2 and the communication device 16 .

If the position determining unit 33 determines that the terminal 2 in the authentication completed state is located outside the vehicle, the key system control device 27 establishes the vehicle exterior authentication, and locks/unlocks the door 21 of the vehicle 5 that is the operation target 1. allow As a result, when the vehicle exterior authentication is established and the predetermined locking/unlocking operation is executed, the door 21 is locked/unlocked. In this example, the predetermined locking/unlocking operation is, for example, an operation of touching the door handle 22 .

If the position determining unit 33 determines that the terminal 2 in the authentication completed state is located inside the vehicle, the key system control device 27 establishes the vehicle interior authentication and permits starting of the engine of the vehicle 5 which is the operation target 1. do. Therefore, when the outside authentication is established, the engine of the vehicle 5 is started when the engine switch on the driver's seat is pushed while the brake pedal (not shown) is depressed.

[Monitoring of user's intention to operate]
As shown in FIG. 4, the monitoring unit 35 monitors output attenuation of the transmitted radio wave when the radio wave is transmitted from the antenna 17 (first antenna 17L) of the door handle 22 . The radio wave whose output attenuation is monitored is preferably a periodic radio wave St that is repeatedly transmitted from the antenna 17 (first antenna 17L) in order to inform the other party of its existence. The periodic radio waves St are continuously transmitted periodically even after the terminal 2 is authenticated and the terminal 2 is shifted to the authentication completed state. In this manner, the monitoring unit 35 of this example monitors the output attenuation of the periodic radio waves St periodically transmitted at the connection interval after the transition to the authentication completed state.

As shown in FIG. 5, it is assumed that the user touches (grips) the door handle 22 while the output attenuation of the periodic radio wave St is being monitored. When the user's body touches the door handle 22, the transmission output of the periodic radio wave St is attenuated by the influence of the user's body. The monitoring unit 35 outputs a notification to the control unit 37 that the door handle 22 has been touched when the output attenuation of the monitored radio wave reaches a predetermined attenuation amount. In this example, the monitoring unit 35 outputs a notification to the effect that the door handle 22 has been touched to the control unit 37 when the attenuation amount of the radio wave transmission output of the radio wave to be monitored reaches or exceeds a specified value.

When receiving the notification that the door handle 22 has been touched from the monitoring unit 35, the control unit 37 outputs a door lock operation request Srq to the key system control device 27 if the terminal 2 is authenticated. Specifically, the control unit 37 inputs the notification that the door handle 22 has been touched from the monitoring unit 35, and if the vehicle exterior authentication is established, the door lock activation request Srq is keyed. Output to the system control device 27 . When outputting the door lock operation request Srq, it is preferable to add whether or not the terminal 2 is located outside the driver's seat as one condition for determination.

When the door lock operation request Srq is input from the control unit 37, the key system control device 27 outputs a door unlock request to the door lock control device (equipment 26) if the door 21 is locked. When a door unlock request is input from the key system controller 27, the door lock controller switches the door 21 to the unlocked state. On the other hand, when the door lock operation request Srq is input from the control unit 37, the key system control device 27 outputs a door lock request to the door lock control device (equipment 26) if the door 21 is unlocked. When the door lock request is input from the key system control device 27, the door lock control device switches the door 21 to the locked state.

Thus, when the vehicle exterior authentication is established, the door 21 is alternately locked and unlocked each time the door handle 22 is touched. Further, when the user gets on the vehicle, if the in-vehicle authentication of the terminal 2 is established, the power transition operation by the engine switch on the driver's seat is permitted. Therefore, when the engine switch is pressed while the brake pedal is depressed, the engine is started.

According to the key system 3 (user operation intention recognition method) of the above embodiment, the following effects can be obtained.
(1) The key system 3 is provided with one or more short-range wireless communication antennas 17 for the operation target 1, authenticates the terminal 2 by short-range wireless communication between the terminal 2 and the antenna 17, and operates the operation target 1. to activate. The monitoring unit 35 of the key system 3 monitors the output attenuation of the radio wave when the radio wave is transmitted from the antenna 17 provided on the member 36 that the user touches while using the operation target 1 . Based on the monitoring result of the monitoring unit 35, the control unit 37 of the key system 3 determines the user's intention to operate the operation target 1 from changes in the output attenuation of the radio wave, and activates the operation target 1. FIG.

According to the configuration of this example, radio waves are transmitted from the antenna 17 provided on the member 36 that the user touches while using the operation target 1, and output attenuation of the radio waves is monitored. Then, the user's intention to operate is determined from the change in the output attenuation of the radio wave, and the operation target 1 is operated. Therefore, it is possible to detect the user's operation on the member 36 without adding components such as sensors and switches to the operation target 1 . Therefore, the user's intention to operate can be detected without adding parts.

(2) The member 36 on which the antenna 17 is arranged is the door handle 22 provided on the door 21 of the operation target 1 . According to this configuration, it is possible to detect whether or not the door handle 22 has been touched from changes in the output attenuation of the radio waves of the antenna 17 provided on the door handle 22 . Therefore, when the authentication of the terminal 2 is established, it is possible to realize the control of activating the operation target 1 at the timing when the touch of the door handle 22 is detected.

(3) The terminal 2 becomes the key of the operation target 1 by externally registering the digital key Dk used for authentication. According to this configuration, for example, the terminal 2 such as a high-performance mobile phone can be used as the key of the operation target 1 . Therefore, since it is not necessary to possess a dedicated key for the operation target 1, convenience can be improved.

(4) The radio wave whose output attenuation is monitored is the periodic radio wave St that is repeatedly transmitted from the antenna 17 to inform the other party of its existence. According to this configuration, without transmitting a special radio wave from the antenna 17 , it is possible to monitor whether or not the user is operating using the periodic radio wave St periodically transmitted from the antenna 17 .

(5) The periodic radio wave St is a radio wave that is continuously transmitted regularly even after the terminal 2 has been authenticated and the terminal 2 has transitioned to the authentication completed state. According to this configuration, it is possible to monitor the output attenuation of radio waves under optimal conditions after the terminal 2 has been authenticated.

(6) The measurement unit 32 of the key system 3 obtains a measured value R related to the communication distance from the periodic radio waves St. The position determination unit 33 of the key system 3 determines the position of the terminal 2 with respect to the operation target 1 based on the measured value R. When the position determination unit 33 determines that the terminal 2 is located outside the room in the operation target 1, the control unit 37 recognizes the touch on the door handle 22 based on the monitoring result of the output attenuation, and activates the operation target 1. let it run. According to this configuration, since the position of the terminal 2 carried by the user is also determined and the operation target 1 is operated, the operation intention of the user can be more reflected and the operation target 1 can be operated.

In addition, this embodiment can be changed and implemented as follows. This embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
- The member 36 is not limited to the door handle 22, and may be any part that is touched by the user, such as a door glass, a windshield, or a door body.

- The 1st antenna 17L, the 2nd antenna 17M, and the 3rd antenna 17N are not limited to being connected to the communication apparatus 16 by wire, You may connect by radio.
- The operation of the first antenna 17L, the second antenna 17M, and the third antenna 17N is not limited to being managed by the communication device 16, and may be, for example, a beacon that operates alone. In the case of a beacon, wireless connection with the communication device 16 is possible, which is advantageous in terms of ease of mounting.

- The monitoring of the output attenuation of radio waves is not limited to being performed by the operation target 1 (vehicle 5), and may be performed by the terminal 2 as well.
- The periodic radio wave St may be a radio wave having an advertising function.

The radio wave whose output attenuation is monitored is not limited to the periodic radio wave St, and is not particularly limited as long as it is a radio wave exchanged between the terminal 2 and the antenna 17 .
・Determination of whether or not the output of radio waves has attenuated can be done in either the form of confirming whether the output of radio waves is less than the threshold or the form of confirming whether the output of radio waves is "0". .

- It is preferable that the periodic radio wave St (advertise) is a radio wave transmitted at frequencies of a plurality of channels (for example, three channels). Here, in the case of noise or reflection, only one of the three channels is attenuated, and in the case of human presence, the output is attenuated in all channels. Therefore, it is possible to distinguish output attenuation due to noise, reflection, etc., from output attenuation due to the presence of a person, which is advantageous in accurately detecting whether the door handle 22 is touched.

- For example, the main antenna 17A of the communication device 16 may be arranged on the member 36 instead of the first antenna 17L.
- The measurement unit 32 may be provided in the operation target 1 instead of the terminal 2 . That is, the received signal strength may be measured using radio waves received by the operation target 1 .

The configuration is not limited to switching between locking and unlocking of the door lock each time the door handle 22 is touched. For example, the operation performed by touching the door handle 22 may be only one of locking and unlocking.

- The operation of the operation target 1 is not limited to locking and unlocking the door 21 . For example, opening and closing of the door 21, display on the display, activation of the car navigation system, adjustment of the seat position, and the like may be performed.

The terminal 2 is not limited to a high-performance mobile phone that becomes a key by registering the digital key Dk, and may be an electronic key dedicated to the vehicle 5, for example.
- The operation target 1 is not limited to the vehicle 5, and may be, for example, a door of a building or a house.

The authentication unit 18, the measurement unit 32, the position determination unit 33, the monitoring unit 35, and the control unit 37 may be configured by one or more processors that operate according to [1] computer programs (software), [2 ] in combination with such a processor and one or more dedicated hardware circuits, such as an application specific integrated circuit (ASIC), for performing at least some of the various operations. A processor includes a CPU and memory, such as RAM and ROM, which stores program code or instructions configured to cause the CPU to perform processes. Memory (computer-readable media) includes any available media that can be accessed by a general purpose or special purpose computer. Alternatively, instead of a computer including the above processor, a processing circuit configured by one or more dedicated hardware circuits that perform all of the various types of processing may be used.

- The authentication unit 18, the measurement unit 32, the position determination unit 33, the monitoring unit 35, and the control unit 37 may be configured by independent processors, or part of the functions may be configured by a shared processor. In this way, the authentication unit 18, the measurement unit 32, the position determination unit 33, the monitoring unit 35, and the control unit 37 are not limited to independent functional blocks, and may be configured from one functional block, or may be configured from a single functional block. may be configured from functional blocks that are

- Although the present disclosure has been described with reference to examples, it is understood that the present disclosure is not limited to such examples or structures. The present disclosure also includes various modifications and modifications within the equivalent range. In addition, various combinations and configurations, as well as other combinations and configurations, including single elements, more, or less, are within the scope and spirit of this disclosure.

1 Operation target 2 Terminal 3 Key system 5 Vehicle 17 Antenna 17A Main antenna 17L First antenna 17M Second antenna 17N Third antenna 21 Door 22 Door handle 32 Measuring unit 33 Position determining unit 35 Monitoring unit 36 Member 37 Control unit Dk Digital key St Periodic radio wave R Measured value.

Claims (7)

A key system in which an operation target is provided with one or more short-range wireless communication antennas, the terminal is authenticated by the short-range wireless communication between the terminal and the antenna, and the operation target is operated,
a monitoring unit that monitors the output attenuation of the radio wave when the radio wave is transmitted from the antenna provided on the member that the user touches during use of the operation target;
a control unit that determines a user's intention to operate the operation object from changes in the output attenuation of the radio waves based on the monitoring result of the monitoring unit, and activates the operation object. 2. A key system according to claim 1, wherein said member on which said antenna is arranged is a door handle provided on said door to be operated. 3. The key system according to claim 1, wherein said terminal serves as said key to be operated by externally registering a digital key used in said authentication. 4. The key system according to any one of claims 1 to 3, wherein said radio wave is a periodic radio wave repeatedly transmitted from said antenna for informing the other party of its existence. 5. The key system according to claim 4, wherein said periodic radio wave is a radio wave that is periodically transmitted continuously even after said terminal has been authenticated and said terminal has transitioned to an authentication completed state. a measurement unit that obtains a measurement value related to communication distance from the periodic radio wave;
a position determination unit that determines the position of the terminal with respect to the operation target based on the measured value;
When the position determination unit determines that the terminal is located outside the room in the operation target, the control unit performs the operation of the operation target when recognizing a touch on the door handle based on the output attenuation monitoring result. 6. The key system according to claim 4 or 5, wherein the key system allows A user operation used in a key system in which one or more short-range wireless communication antennas are provided in an operation target, and the terminal is authenticated by the short-range wireless communication between the terminal and the antenna, and the operation target is operated. A method of intention recognition,
monitoring the output attenuation of the radio wave when the radio wave is transmitted from the antenna provided on the member touched by the user during the use of the operation target;
Determining the user's operation intention for the operation object from the change in the output attenuation of the radio wave based on the monitoring result of the output attenuation, and causing the key system to operate the operation object. recognition method.

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