JP2012102529A - Electronic key system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic key system for a vehicle, capable of performing appropriate reporting to a user when an electronic key is dropped.SOLUTION: An electronic key system 1 for a vehicle for performing reporting to a user when the user drops an electronic key 10 to be used in a vehicle 20 includes: determination means for determining whether or not the electronic key is dropped; distance calculation means for calculating a distance X between the electronic key 10 and the vehicle 20 when determined that the electronic key 10 is dropped; and selection means for selecting a reporting method to the user corresponding to the distance X. When it is determined that the electronic key is dropped in the determination means, reporting is performed to the user by the reporting method selected in the selection means. Especially, it is suitable when a distance Y between the electronic key 10 and a mobile phone 40 and a distance Z between the vehicle 20 and the mobile phone 40 are also calculated in the distance calculation means and the reporting method to the user is selected corresponding to the distances X, Y, Z among three points in the selection means.

Description

  The present invention relates to a vehicular electronic key system that notifies a user when an electronic key used in a vehicle is dropped by the user.

  In recent years, electronic keys that can be used to open / lock a door of a vehicle, start / stop an engine, and the like by radio waves have become widespread. If the user of the vehicle drops the electronic key and the user remains unaware, the electronic key may be picked up by a third party and used illegally, and the vehicle may be stolen. Therefore, in order to prevent such vehicle theft, security techniques for electronic keys have been proposed. For example, in Patent Document 1, a vibration sensor is built in a case of a smart key, and when a vibration value based on a detection value by the vibration sensor exceeds a threshold value (that is, it can be determined that the smart key has fallen on the ground or the like). In other words, it is disclosed to restrict the function of the smart key and notify the user's mobile phone of that fact.

JP 2005-171666 A JP 2006-226025 A JP 2006-232076 A

  Just notifying the user's mobile phone that the electronic key has been dropped as described above, the user does not have a mobile phone, the mobile phone is turned off, the user does not hold the mobile phone at hand, If the telephone is left in the vehicle and the mobile phone is dropped along with the electronic key, the user cannot be notified that the electronic key has been dropped.

  Then, this invention makes it a subject to provide the electronic key system for vehicles which can alert | report suitable to a user, when an electronic key is dropped.

  An electronic key system for a vehicle according to the present invention is an electronic key system for a vehicle that notifies a user when an electronic key used in a vehicle is dropped by a user, and vibration detected by a vibration sensor provided in the electronic key. Based on the determination means for determining whether or not the electronic key has dropped, the electronic key position acquisition means for acquiring the position information of the electronic key, the vehicle position acquisition means for acquiring the position information of the vehicle, and the determination means Distance to calculate the distance between the electronic key and the vehicle based on the position information of the electronic key acquired by the electronic key position acquisition means and the position information of the vehicle acquired by the vehicle position acquisition means when it is determined that the key has dropped A calculating unit; and a selecting unit that selects a notification method to the user according to the distance calculated by the distance calculating unit. When the determining unit determines that the electronic key has dropped, the selecting unit selects Characterized in that it informs the user by the informing method.

  In this vehicle electronic key system, the electronic key is equipped with a vibration sensor, and it is determined whether or not the electronic key has been dropped based on the vibration detected by the vibration sensor. In the vehicle electronic key system, the electronic key position acquisition unit acquires the electronic key position information, and the vehicle position acquisition unit acquires the vehicle position information. In the vehicle electronic key system, the distance calculation means calculates the distance between the electronic key and the vehicle from the position information of the electronic key and the position information of the vehicle when the determination means determines that the electronic key has dropped. . Furthermore, in the vehicle electronic key system, the notification means to the user is selected by the selecting means according to the distance between the vehicle and the electronic key. For example, when the distance between the vehicle and the electronic key after dropping is small, there is a high possibility that the user is close to the vehicle, so that notification using the vehicle is possible. In this case, it is possible to notify the user without using a mobile phone or the like. On the other hand, when the distance between the vehicle and the electronic key after dropping is large, there is a low possibility that the user is near the vehicle. Therefore, notification using a mobile phone other than the vehicle is suitable. In the vehicular electronic key system, when the determination unit determines that the electronic key has been dropped, the notification is made to the user by the notification method selected by the selection unit. As described above, the vehicle electronic key system can appropriately notify the user by selecting a notification method according to the distance between the electronic key and the vehicle when the user drops the electronic key. .

  The electronic key system for a vehicle according to the present invention includes a pickup detecting means for detecting that the electronic key is picked up when the electronic key is dropped, and detects that the electronic key has been picked up by the pickup detecting means for a threshold time or more. If not, it is preferable to notify the user by the notification method selected by the selection means.

  In this vehicle electronic key system, when the electronic key is dropped by the detection detection means, it is detected that the electronic key has been picked up. When the dropped electronic key is picked up by the user, there is no need to notify the user. Further, it is considered that the time until the user notices that the electronic key has been dropped and picks up the electronic key is short. Therefore, in the vehicle electronic key system, the selection means selects when the pickup detection means does not detect that the electronic key has been picked up for a threshold time (a time sufficient for the user to notice and pick it up). Notification is performed by the method described above. Even if the user has dropped the electronic key but noticed that the user has dropped it and picked it up, the notification is unnecessary for the user. Therefore, the notification is made after the user waits for a threshold time after dropping the electronic key. Thus, since this vehicle electronic key system performs notification only when it can be determined that the user has not picked up the electronic key dropped, unnecessary notification to the user can be prevented.

  The electronic key system for a vehicle according to the present invention includes a mobile terminal position acquisition unit that acquires position information of the user's mobile terminal, and the distance calculation unit determines the electronic key position when the determination unit determines that the electronic key has dropped. Based on the position information of the electronic key acquired by the acquisition means and the position information of the mobile terminal acquired by the mobile terminal position acquisition means, the distance between the electronic key and the mobile terminal is calculated, and the vehicle acquired by the vehicle position acquisition means The distance between the vehicle and the portable terminal is calculated based on the position information of the portable terminal and the position information of the portable terminal acquired by the portable terminal position acquisition means, and the selection means includes the electronic key calculated by the distance calculation means, the vehicle and the portable terminal It is preferable to select a notification method to the user in accordance with each distance between and.

  In this vehicle electronic key system, the position information of the user's mobile terminal is acquired by the mobile terminal position acquisition means. This user's mobile terminal (for example, mobile phone) can be used as one of the notification means. In the vehicle electronic key system, when the distance calculating means determines that the electronic key has dropped, the position information of the electronic key and the position of the portable terminal are added to the distance between the electronic key and the vehicle. The distance between the electronic key and the portable terminal is calculated from the information, and the distance between the vehicle and the portable terminal is calculated from the position information of the vehicle and the position information of the portable terminal. And in the vehicle electronic key system, the selection means notifies the user according to the distance between the vehicle and the electronic key, the distance between the electronic key and the portable terminal, and the distance between the vehicle and the portable terminal. Select. Since it can be estimated whether the user is carrying the portable terminal at hand from the distance between the electronic key after dropping and the vehicle and the portable terminal, it is possible to determine whether notification using the portable terminal is possible. Thus, this vehicular electronic key system also uses a mobile terminal by selecting a notification method according to each distance between the electronic key, the vehicle, and the mobile terminal when the user drops the electronic key. More appropriate notification to the user.

  In the above-described vehicle electronic key system of the present invention, when the distance between the electronic key calculated by the distance calculation unit and the vehicle is equal to or less than the threshold distance, the selection unit notifies the vehicle using an alarm sound and / or warning light. Is preferred.

  In this vehicle electronic key system, when the distance between the electronic key and the vehicle is less than a threshold distance (a distance that can be recognized by the user using the vehicle) by the selection means, the warning sound of the vehicle and the warning light At least one of the notification methods is selected. As described above, in the vehicle electronic key system, when the distance between the electronic key and the vehicle is equal to or smaller than the threshold distance, the vehicle alarm sound or warning light is used to notify the user without using a mobile phone or the like. However, the user can be surely notified using the vehicle.

  In the vehicle electronic key system of the present invention, destination acquisition means for acquiring destination information registered in a navigation device mounted on the vehicle, and a center for managing the vehicle with destination information acquired by the destination acquisition means The selecting means may be configured to select a notification method for notifying the destination information to the center by the notifying means when the destination information can be acquired by the destination acquiring means.

  In this vehicle electronic key system, the destination information registered in the navigation device mounted on the vehicle is acquired by the destination acquisition means (however, it can be acquired only when the user has set the destination in the navigation device). When the user's destination is known, the user can be notified at the destination. Announcement or the like at such a destination facility can be made by interposing a center for managing the vehicle. Therefore, in the vehicle electronic key system, when the destination information can be acquired by the destination acquisition means (that is, when the user sets the destination in the navigation device), the destination information is managed by the selection means. The notification method to be notified to the center is selected, and the destination information is notified to the management center by the notification means. As described above, in the vehicular electronic key system, when the user's destination is known, the destination information is notified to the center, and the user is notified at the destination. More appropriate notification can be made.

  According to the present invention, when the user drops the electronic key, it is possible to appropriately notify the user by selecting the notification method according to the distance between the electronic key and the vehicle.

It is a lineblock diagram of the electronic key system for vehicles concerning a 1st embodiment. It is a block diagram which shows the structure of the electronic key in the electronic key system for vehicles which concerns on this Embodiment. It is a block diagram which shows the structure of vehicle side ECU in the vehicle electronic key system which concerns on 1st Embodiment. It is a block diagram which shows the structure of the mobile telephone in the electronic key system for vehicles which concerns on this Embodiment. It is a list which shows the user alerting | reporting means and use case according to each distance between the electronic key which concerns on 1st Embodiment, a vehicle, and a mobile telephone. It is a flowchart which shows the flow of operation | movement with the electronic key in the electronic key system for vehicles which concerns on 1st Embodiment. It is a flowchart which shows the flow of operation | movement by the vehicle side ECU in the electronic key system for vehicles which concerns on 1st Embodiment. It is a flowchart which shows the flow of operation | movement with the mobile telephone in the electronic key system for vehicles which concerns on 1st Embodiment. It is a time chart which shows the flow of operation | movement of the whole vehicle electronic key system which concerns on 1st Embodiment. It is a block diagram of the electronic key system for vehicles which concerns on 2nd Embodiment. It is a block diagram which shows the structure of vehicle side ECU in the electronic key system for vehicles which concerns on 2nd Embodiment. It is a table | surface which shows the user alerting | reporting means and use case according to each distance between the electronic key which concerns on 2nd Embodiment, a vehicle, and a mobile telephone. It is a flowchart which shows the flow of operation | movement in vehicle side ECU in the electronic key system for vehicles which concerns on 2nd Embodiment. It is a flowchart which shows the flow of operation | movement in the management center in the electronic key system for vehicles which concerns on 2nd Embodiment. It is a time chart which shows the flow of operation | movement of the whole vehicle electronic key system which concerns on 2nd Embodiment.

  Embodiments of an electronic key system for a vehicle according to the present invention will be described below with reference to the drawings. In addition, the same code | symbol is attached | subjected about the element which is the same or it corresponds in each figure, and the overlapping description is abbreviate | omitted.

  In this embodiment, there are two forms. The first embodiment is an electronic key system for a vehicle including an electronic key, a vehicle, and a mobile phone held by a user, and the second embodiment is an electronic key. This is an electronic key system for a vehicle including a vehicle, a mobile phone owned by a user, and a center for managing the vehicle. In the vehicle electronic key system according to the present embodiment, when the user determines that the electronic key has been dropped, in order to notify the user that the key has been dropped after a period of time that can be estimated that the user has not noticed that the key has been dropped. In addition, the user is notified by a notification method using at least one of an electronic key, a vehicle, a mobile phone, and a center.

  With reference to FIGS. 1-5, the vehicle electronic key system 1 which concerns on 1st Embodiment is demonstrated. FIG. 1 is a configuration diagram of a vehicle electronic key system according to a first embodiment. FIG. 2 is a block diagram showing the configuration of the electronic key in the vehicle electronic key system according to the present embodiment. FIG. 3 is a block diagram showing the configuration of the vehicle-side ECU in the vehicle electronic key system according to the first embodiment. FIG. 4 is a block diagram showing the configuration of the mobile phone in the vehicle electronic key system according to the present embodiment. FIG. 5 is a list showing user notification means and use cases according to the distances between the electronic key, the vehicle, and the mobile phone according to the first embodiment.

  The vehicle electronic key system 1 constructs a network between the electronic key 10, the vehicle 20 (particularly, the vehicle-side ECU [Electronic Control Unit] 30) and the mobile phone 40 after a predetermined time has elapsed since it was determined that the electronic key was dropped. Then, communication is performed, the distance between the three points between the electronic key 10, the vehicle 20, and the mobile phone 40 is analyzed, and a notification means for the user is selected based on the analysis result. Continuing to build the network increases power consumption, so the network is built only after a predetermined time has passed since the electronic key was dropped. In particular, the vehicle electronic key system 1 uses an alarm sound or a hazard equipped in the vehicle 20 as one of the notification means. In the present embodiment, the distance between the electronic key 10 and the vehicle 20 is X, the distance between the electronic key 10 and the mobile phone 40 is Y, and the distance between the vehicle 20 and the mobile phone 40 is Z.

  The configuration of the electronic key 10 will be described with reference to FIG. The electronic key 10 has a normal function as an electronic key (lock / unlock of a door, etc., communication with the vehicle 20). Furthermore, the electronic key 10 has functions related to security of the electronic key (fall determination, elapsed time determination after the fall determination, current position acquisition, current position transmission, electronic key normal function restriction). For this purpose, the electronic key 10 includes a microcomputer 11, a vibration sensor 12, a lock button 13, an unlock button 14, a buzzer 15, a transmission circuit 16 (transmission antenna 16a), a reception circuit 17 (reception antenna 17a), and a GPS reception circuit 18 ( A GPS receiving antenna 18a) is provided. The electronic key may have other functions such as starting / stopping the engine as well as locking / unlocking the door. In the present embodiment, the processing in the microcomputer 11 corresponds to the determination means described in the claims, and the processing in the GPS reception circuit 18 (GPS reception antenna 18a) and the microcomputer 11 is described in the claims. This corresponds to electronic key position acquisition means.

  The microcomputer 11 has a ROM [Read Only Memory] 11a and an EEPROM [Electrically Erasable Programmable Read Only Memory] 11b. The ROM 11a has a program for controlling the entire electronic key 10 (such as a door lock / unlock process) and a program relating to the security of the electronic key 10 (a process for determining that the electronic key 10 has been dropped based on the detection value of the vibration sensor 12). , An elapsed time determination process after the fall determination, a process for calculating the current position based on the GPS signal, a process for limiting the normal function of the electronic key, and the like are stored. The EEPROM 11b stores user information of electronic keys and the like. The microcomputer 11 executes each program stored in the ROM 11a and performs processing of each program.

  The vibration sensor 12 is a sensor that detects vibration acting on the electronic key. An example of the vibration sensor 12 is an acceleration sensor that measures acceleration applied to an electronic key. The microcomputer 11 determines that the electronic key 10 has dropped when the vibration value detected by the vibration sensor 12 (for example, downward acceleration by the acceleration sensor) is greater than the threshold value.

  The lock button 13 is a button serving as a trigger for transmitting a signal for locking the door or the like of the vehicle 20 to the microcomputer 11. The unlock button 14 is a button serving as a trigger for transmitting a signal for unlocking the door or the like of the vehicle 20 to the microcomputer 11. The buzzer 15 is a device that outputs a buzzer sound, and emits a buzzer sound to notify the user.

  The transmission circuit 16 is a transmission circuit for transmitting various signals to the vehicle 20. The transmission circuit 16 is connected to the transmission antenna 16a. The transmission antenna 16 a is a transmission antenna for transmitting various signals to the vehicle 20. Signals to be transmitted include a lock / unlock signal, an electronic key drop signal, and an electronic key current position information signal. The receiving circuit 17 is a receiving circuit for receiving various signals from the vehicle 20. The receiving circuit 17 is connected to the receiving antenna 17a. The receiving antenna 17 a is a receiving antenna for receiving various signals from the vehicle 20. As a signal to be received, there is a buzzer sound output request signal. The GPS receiving circuit 18 is a receiving circuit for receiving GPS signals from GPS satellites. The GPS receiving circuit 18 is connected to a GPS receiving antenna 18a. The GPS receiving antenna 18a is a receiving antenna for receiving GPS reception from a GPS satellite.

  With reference to FIG. 3, the configuration of the vehicle-side ECU 30 will be described. The vehicle-side ECU 30 has at least functions related to security of the electronic key 10 (communication with the electronic key 10, communication with the mobile phone 40, acquisition of the current position, measurement of distance between three points, user notification processing, and the like). Therefore, the vehicle-side ECU 30 includes a microcomputer 31, an alarm sound 32, a hazard 33, a door lock 34, a steering lock 35, a transmission circuit 36 (transmission antenna 36a), a reception circuit 37 (reception antenna 37a), and a GPS reception circuit 38 (GPS A receiving antenna 38a) is provided. In the first embodiment, the processing in the GPS receiving circuit 38 (GPS receiving antenna 38a) and the microcomputer 31 corresponds to the vehicle position acquisition means described in the claims, and each processing in the microcomputer 31 is patented. This corresponds to the distance calculation means and selection means described in the claims.

  The microcomputer 31 has a ROM 31a and an EEPROM 31b. The ROM 31a stores a program related to the security of the electronic key 10 (three-point distance calculation processing between the electronic key 10, the vehicle 20, and the mobile phone 40, user notification processing according to the distance between the three points, and the like). . The EEPROM 31b stores electronic key user information, mobile phone information held by the user, and the like. The microcomputer 31 executes each program stored in the ROM 31a and processes each program.

  The alarm sound 32 is a device that outputs an alarm sound, and sounds an alarm sound to notify the user. The hazard 33 is a lamp blinking at the four corners of the vehicle 20 and blinks the hazard to notify the user. The door lock 34 is a device for locking / unlocking the door. The steering lock 35 is a device for locking / unlocking the steering.

  The transmission circuit 36 is a transmission circuit for transmitting various signals to the electronic key 10 and the mobile phone 40. The transmission circuit 36 is connected to the transmission antenna 36a. The transmission antenna 36 a is a transmission antenna for transmitting various signals to the electronic key 10 and the mobile phone 40. A signal to be transmitted to the electronic key 10 includes a buzzer sound output request signal. As a signal to be transmitted to the mobile phone 40, there is an email notifying that the electronic key 10 has been dropped. The receiving circuit 37 is a receiving circuit for receiving various signals from the electronic key 10 and the mobile phone 40. The receiving circuit 37 is connected to the receiving antenna 37a. The receiving antenna 37 a is a receiving antenna for receiving various signals from the electronic key 10 and the mobile phone 40. Signals received from the electronic key 10 include a lock / unlock signal, an electronic key drop signal, and an electronic key current position information signal. A signal received from the mobile phone 40 includes a current location information signal of the mobile phone. The GPS receiving circuit 38 is a receiving circuit for receiving GPS signals from GPS satellites. The GPS receiving circuit 38 is connected to a GPS receiving antenna 38a. The GPS receiving antenna 38a is a receiving antenna for receiving GPS reception from a GPS satellite.

  The configuration of the mobile phone 40 will be described with reference to FIG. The mobile phone 40 has a normal function as a mobile phone (call, mail, etc.). Further, the mobile phone 40 has functions related to electronic key security (acquisition of current position, transmission of current position). For this purpose, the mobile phone 40 includes a microcomputer 41, a transmission circuit 42 (transmission antenna 42a), a reception circuit 43 (reception antenna 43a), and a GPS reception circuit 44 (GPS reception antenna 44a). Note that the mobile phone 40 is a normal mobile phone having a GPS function. In the present embodiment, the processing in the GPS receiving circuit 44 (GPS receiving antenna 44a) and the microcomputer 41 corresponds to the mobile terminal position acquisition means described in the claims.

  The microcomputer 41 has a ROM 41a and an EEPROM 41b. The ROM 41a stores a program for controlling the entire mobile phone 40 (call processing, mail processing, etc.) and a program relating to security of the electronic key 10 (processing for calculating the current position based on GPS signals, etc.). This current position calculation processing is also included in normal processing in a mobile phone having a GPS function. The EEPROM 41b stores mobile phone user information and the like. The microcomputer 41 executes each program stored in the ROM 41a and processes each program.

  The transmission circuit 42 is a transmission circuit for transmitting various signals to the vehicle 20 and the like. The transmission circuit 42 is connected to the transmission antenna 42a. The transmission antenna 42a is a transmission antenna for transmitting various signals to the vehicle 20 and the like. As a signal to be transmitted, there is a current position information signal of a cellular phone. The receiving circuit 43 is a receiving circuit for receiving various signals from the vehicle 20 or the like. The receiving circuit 43 is connected to the receiving antenna 43a. The receiving antenna 43a is a receiving antenna for receiving various signals from the vehicle 20 or the like. As a signal to be received, there is a user notification mail from the vehicle 20. The GPS receiving circuit 44 is a receiving circuit for receiving GPS signals from GPS satellites. The GPS receiving circuit 44 is connected to a GPS receiving antenna 44a. The GPS receiving antenna 44a is a receiving antenna for receiving GPS reception from a GPS satellite. Note that the transmission circuit, the reception circuit, the GPS reception circuit, and each antenna are provided in a normal mobile phone.

  Since the user uses the electronic key 10 to lock / unlock the vehicle 20, the user often drops the electronic key 10 near the vehicle 20. Therefore, when the user drops the electronic key 10 near the parked vehicle 20, it is important to reliably notify the user that the electronic key 10 has been dropped. However, when the electronic key 10 is dropped near the parked vehicle 20, there are four cases in which a problem occurs only by notifying the user of the mobile phone 40 by e-mail.

  Case 1 is a case where the user does not have the mobile phone 40 or the mobile phone 40 is not turned on. In the first place, a user who does not have the mobile phone 40 has no notification means such as e-mail. Further, when the mobile phone 40 is not turned on, the current position information cannot be obtained from the mobile phone 40 and the notification mail cannot be received. In this case 1, even if the user's mobile phone information is not registered in the vehicle 20 or the current position information is requested to the mobile phone 40 registered in the vehicle 20, it cannot be acquired. Therefore, the distance X between the electronic key 10 and the vehicle 20 is small, the distance Y between the electronic key 10 and the mobile phone 40 is indefinite, and the distance Z between the vehicle 20 and the mobile phone 40 is indefinite.

  Case 2 is a case where the mobile phone 40 is left behind at home or in a certain place. If the mobile phone 40 is misplaced, it is necessary to realize that the mobile phone 40 is not held, and even if e-mail notification is made, the user does not notice the e-mail until the user goes to the place where the mobile phone 40 is misplaced. In the case 2, when the current position information is requested to the mobile phone 40 registered in the vehicle 20, the current position information can be acquired. The vehicle 20 and the electronic key 10 are not separated from each other, but the mobile phone 40 is separated from the vehicle 20 and the electronic key 10 by a certain distance or more. Therefore, the distance X between the electronic key 10 and the vehicle 20 is small, the distance Y between the electronic key 10 and the mobile phone 40 is large, and the distance Z between the vehicle 20 and the mobile phone 40 is large.

  Case 3 is a case where the mobile phone 40 is left in the vehicle 20. When the mobile phone 40 is left in the vehicle 20, it is necessary to notice that the mobile phone 40 is not held, and even if an e-mail notification is made, the user does not notice the e-mail until the user gets on the vehicle 20. In the case 3, when the current position information is requested to the mobile phone 40 registered in the vehicle 20, the current position information can be acquired. Further, the mobile phone 40 is in the vehicle 20, and the vehicle 20 and the electronic key 10 are not separated from each other. Therefore, the distance X between the electronic key 10 and the vehicle 20 is small, the distance Y between the electronic key 10 and the mobile phone 40 is small, and the distance Z between the vehicle 20 and the mobile phone 40 is small.

  Case 4 is a case where the electronic key 10 and the mobile phone 40 are dropped at the same time (when a bag containing the electronic key 10 and the mobile phone 40 is dropped). When the electronic key 10 and the mobile phone 40 are dropped at the same time, when the third party picks up the bag or the like, the third party notices that the mobile phone 40 is notified of the notification mail. If the security of the key 10 can be released, there is a risk that the security may be released by a third party. In the case 4, as in the case 3, the distance X between the electronic key 10 and the vehicle 20 is small, the distance Y between the electronic key 10 and the mobile phone 40 is small, and the distance Z between the vehicle 20 and the mobile phone 40 is small. .

  In cases 1 to 4, the mail notification to the mobile phone 40 cannot immediately make the user aware that the electronic key has been dropped. However, since the distance X between the electronic key 10 and the vehicle 20 is small, there is a high possibility that a user is present near the vehicle 20 within a predetermined time after the electronic key 10 is dropped. Is possible.

  With reference to FIG. 5, the notification means to a user according to the distance X between the electronic key 10 and the vehicle 20, the distance Y between the electronic key 10 and the mobile phone 40, and the distance Z between the vehicle 20 and the mobile phone 40 will be described. Here, the distance is expressed as large, small, or indefinite. For example, when the distance is small, the alarm is sounded by the vehicle 20 or when the hazard blinks, the distance is such that the user can sufficiently recognize it, and when the distance is large, the distance cannot be recognized by the user.

  When the distance X is large (or undefined), the distance Y is large (or undefined), and the distance Z is large (or undefined), the mobile phone 40 is at home or the user does not have a mobile phone (or In this case, the electronic key 10 is dropped to a certain place (a place away from the vehicle 20 by a certain distance) in a state where the power of the mobile phone 40 is not turned on. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded.

  When the distance X is large (or undefined), the distance Y is large (or undefined), and the distance Z is small, the mobile phone 40 is left in the vehicle 20 and the electronic key 10 is in a certain place (a certain distance from the vehicle 20). This is a case of dropping to a remote location. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded.

  When the distance X is large (or indefinite), the distance Y is small, and the distance Z is large (or indefinite), the case where the electronic key 10 and the mobile phone 40 are simultaneously dropped to a certain place (a place more than a certain distance from the vehicle 20). It is. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded.

  When the distance X is large (or indefinite), the distance Y is small, and the distance Z is small, the situation cannot be specified. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded.

  When the distance X is small, the distance Y is large (or indefinite), and the distance Z is large (or indefinite), it is the case 1 or case 2 described above, and the mobile phone 40 is at home or the user. Is a case where the electronic key 10 is dropped near the vehicle 20 in a state where the mobile phone is not owned (or the power of the mobile phone 40 is not turned on). In this case, as the user notification means, since the possibility that the user is near the vehicle 20 is high, the alarm sound of the vehicle 20 is sounded and the hazard blinks. In this case, mail may be transmitted to the mobile phone 40 or a buzzer of the electronic key 10 may be sounded.

  When the distance X is small, the distance Y is large (or indefinite), and the distance Z is small, the situation cannot be specified. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded. In this case, since there is a high possibility that the user is near the vehicle 20, an alarm sound of the vehicle 20 may be sounded and a hazard may be blinked.

  When the distance X is small, the distance Y is small, and the distance Z is large (or indefinite), the situation cannot be specified. In this case, as user notification means, a mail is transmitted to the mobile phone 40 or a buzzer of the electronic key 10 is sounded. In this case, since there is a high possibility that the user is near the vehicle 20, an alarm sound of the vehicle 20 may be sounded and a hazard may be blinked.

  The case where the distance X is small, the distance Y is small, and the distance Z is small is the case 3 or case 4 described above, and the electronic key 10 is inserted into the vehicle 20 with the mobile phone 40 left in the vehicle 20. Or the electronic key 10 and the mobile phone 40 are dropped near the vehicle 20 at the same time. In this case, as the user notification means, since the possibility that the user is near the vehicle 20 is high, the alarm sound of the vehicle 20 is sounded and the hazard blinks. In this case, mail may be transmitted to the mobile phone 40 or a buzzer of the electronic key 10 may be sounded.

  With reference to FIGS. 1-5, the operation | movement in the electronic key system 1 for vehicles is demonstrated. In particular, the operation of the electronic key 10 will be described along the flowchart of FIG. 6, the operation of the vehicle 20 (vehicle side ECU 30) will be described along the flowchart of FIG. 7, and the operation of the mobile phone 40 will be described. Description will be made along the flowchart of FIG. 8, and the flow of the operation of the entire vehicle electronic key system 1 will be described along the time chart of FIG. In the time chart of FIG. 9, “A” is the operation of the flowchart A of FIG. 6, “B” is the operation of the flowchart B of FIG. 7, and “C” is the operation of the flowchart C of FIG. Done.

  At certain time intervals, the electronic key 10 acquires a vibration value (for example, an acceleration value by an acceleration sensor) by the vibration sensor 12 (S10, T10). The microcomputer 11 of the electronic key 10 determines whether or not this vibration value is greater than a threshold value (S11). If it is determined in S11 that the vibration value is greater than the threshold value (that is, if it can be determined that the user has dropped the electronic key 10), the microcomputer 11 sets the impact detection signal as “present” (S12). On the other hand, when it is determined in S11 that the vibration value is equal to or less than the threshold value, the microcomputer 11 sets the impact detection signal to “none” (S13). This threshold value is a vibration value that can sufficiently determine that the electronic key 10 has been dropped, and is set in advance by an experiment or the like.

  The microcomputer 11 determines whether or not the impact detection signal is “present” (S14). If it is determined “Yes” in S14, the microcomputer 11 starts a fall continuation timer (S15). On the other hand, if it is determined as “none” in S <b> 14, the microcomputer 11 proceeds to the next without performing the process.

  The microcomputer 11 determines whether or not the fall continuation timer has started (S16). If it is determined in S16 that it has started, the microcomputer 11 increments the fall continuation timer (S17). On the other hand, if it is determined in S16 that the process has not started, the microcomputer 11 proceeds to the next step without performing any processing.

  In the microcomputer 11, it is determined whether or not a predetermined time has elapsed in the fall continuation timer (S18). When it is determined in S18 that the drop continuation timer has elapsed for a predetermined time (that is, when it can be estimated that the user has not noticed that the electronic key 10 has been dropped), the microcomputer 11 has an electronic key drop signal “Yes”. Is set (S19). On the other hand, if it is determined in S18 that the drop continuation timer has not passed the predetermined time, the microcomputer 11 sets the electronic key drop signal to “none” (S20). The predetermined time is a time that can be estimated that the user has not noticed that the electronic key 10 has been dropped, and is set in advance by an experiment or the like. Further, the predetermined time is a time when the electronic key 10 is dropped near the vehicle 20 and can move only by a distance (range) that the user notices sufficiently by an alarm sound of the vehicle 20 or blinking of a hazard. By shortening the predetermined time, it is possible to notify the user early and prevent the electronic key 10 from being picked up by a third party as much as possible.

  In addition, after determining that the electronic key 10 has been dropped, it is preferable to detect (determine) that the electronic key 10 has been picked up. As the detection method, for example, a method of detecting whether the upward acceleration by the acceleration sensor is equal to or higher than a threshold value, a method of detecting a human body temperature with the electronic key 10, and a method of detecting an input operation to the electronic key 10 There is. The detection means by this detection method corresponds to the detection detection means described in the claims. Before the elapse of the fall continuation timer, the electronic time is detected by such a detection method before elapse of a predetermined time (this predetermined time may be the same time as the determination in S18 or a different time). When it is detected that the key 10 has been picked up, the fall continuation timer is reset and the impact detection signal is also set to “none”.

  The microcomputer 11 determines whether or not the electronic key drop signal is “present” (S21). If it is determined in S21 that the electronic key drop signal is “present”, the GPS receiving circuit 18 receives the GPS signal by the GPS receiving antenna 18a, and the microcomputer 11 calculates the current position of the electronic key 10 based on the GPS signal. (Acquire) (S22, T11). Then, the microcomputer 11 issues a command for transmitting the current position information and the fall key signal to the vehicle 20, and the transmission circuit 16 transmits the current position information and the drop key signal from the transmission antenna 16a to the vehicle 20 (S23, T12). . At this time, the microcomputer 11 restricts the normal function of the electronic key 10 to prevent unauthorized use by a third party. On the other hand, if it is determined in S21 that the electronic key drop signal is “none”, no processing is performed.

  In the vehicle 20, the receiving circuit 37 of the vehicle-side ECU 30 receives the current position information and the electronic key drop signal from the electronic key 10 by the receiving antenna 37a when the current position information and the like are transmitted from the electronic key 10 (S30). ). The microcomputer 31 of the vehicle side ECU 30 determines whether or not the electronic key drop signal from the electronic key 10 is “present” (S31). If it is determined in S31 that the electronic key drop signal is “none”, the current operation is terminated without performing the process.

  If it is determined in S31 that the electronic key drop signal is “present”, the GPS receiving circuit 38 receives the GPS signal by the GPS receiving antenna 38a, and the microcomputer 31 calculates the current position of the vehicle 20 based on the GPS signal ( Acquisition) (S32, T13). Then, the microcomputer 31 issues a command for requesting the current location information to the mobile phone 40, and the transmission circuit 36 transmits a current location information acquisition request from the transmission antenna 36a to the mobile phone 40 (T14).

  In the mobile phone 40, when the current position information acquisition request is transmitted from the vehicle 20, the reception circuit 43 receives the current position information acquisition request from the vehicle 20 by the reception antenna 43a. The microcomputer 41 of the mobile phone 40 determines whether or not the current position information acquisition request from the vehicle 20 is “Yes” (S40). If it is determined in S40 that the current position information acquisition request is “none”, the current operation is terminated without performing the process.

  If it is determined in S40 that the current position information acquisition request is “Yes”, the GPS receiving circuit 44 receives the GPS signal by the GPS receiving antenna 44a, and the microcomputer 41 determines the current position of the mobile phone 40 based on the GPS signal. Calculation (acquisition) is performed (S41, T15). Then, the microcomputer 41 issues a command for transmitting the current position information to the vehicle 20, and the transmission circuit 42 transmits the current position information to the vehicle 20 from the transmission antenna 42a (S42).

  In the vehicle 20, the receiving circuit 37 of the vehicle ECU 30 receives (acquires) the current position information from the mobile phone 40 by the receiving antenna 37a when the current position information is transmitted from the mobile phone 40 (S33, T16). .

  The microcomputer 31 of the vehicle-side ECU 30 uses the current position information of the vehicle 20 and the current position information of the electronic key 10 as the three-point distance between the electronic key 10, the vehicle 20, and the mobile phone 40. Distance X = | (current position of the vehicle 20) − (current position of the electronic key 10) | and the electronic key using the current position information of the electronic key 10 and the current position information of the mobile phone 40. 10 and the current position information of the vehicle 20 and the current position information of the vehicle 20 are calculated by calculating the distance Y = | (current position of the electronic key 10) − (current position of the mobile phone 40) | The distance Z = | (current position of the mobile phone 40) − (current position of the vehicle 20) | between the mobile phone 40 and the vehicle 20 is calculated (S34). Then, the microcomputer 31 compares and determines the distances X, Y, and Z between the three points (S35).

  If it is determined in S35 that the distance X is small, the distance Y is large (or indeterminate), and the distance Z is large (or indefinite), the microcomputer 31 determines that an alarm sound is sounded and a hazard is lit as a notification to the user. In the alarm sound 32, an alarm sound is sounded, and in the hazard 33, the lamp is blinked (S36, T17). If it is determined in S35 that the distance X is small, the distance Y is small, and the distance Z is small, the microcomputer 31 determines that the alarm sound is blown and the hazard is lit as a notification to the user. The sound is blown, and the lamp is blinked in the hazard 33 (S37, T17). In this case, since the user is near the vehicle 20, the user notices that the electronic key 10 has been dropped by the alarm sound or the hazard.

  If it is determined in S35 that the relationship between the distance X, the distance Y, and the distance Z is other than the above, the microcomputer 31 determines that the buzzer of the electronic key 10 or the e-mail transmission to the mobile phone 40 is notified to the user. The transmission circuit 36 transmits a buzzer sounding request from the transmission antenna 36a to the electronic key 10 (S38, T18), or the transmission circuit 36 sends a mail to the mobile phone 40 informing that the electronic key 10 has been dropped from the transmission antenna 36a. Transmit (S38, T19). When a buzzer sounding request is transmitted from the vehicle 20, in the electronic key 10, the receiving circuit 17 receives the buzzer sounding request from the vehicle 20 by the receiving antenna 17a, and the buzzer 15 sounds the buzzer sound. Alternatively, when a mail is transmitted from the vehicle 20, in the mobile phone 40, the reception circuit 43 receives the mail from the vehicle 20 through the reception antenna 43 a. In this case, the user notices that the electronic key 10 has been dropped by the buzzer of the electronic key 10 or the mail received by the mobile phone 40.

  According to the vehicle electronic key system 1, when the user drops the electronic key 10, the notification means is provided according to the relationship of the three-point distance X, Y, Z between the electronic key 10, the vehicle 20, and the mobile phone 40. By selecting, it is possible to appropriately notify the user. In particular, when it can be determined that the user is close to the vehicle 20 from the three-point distances X, Y, and Z, the user has a mobile phone by selecting a warning sound of the vehicle 20 or a notification means by hazard. When the mobile phone 40 is not turned on, when the mobile phone 40 is left unattended, when the mobile phone 40 is left in the vehicle 20, the mobile phone 40 is dropped at the same time as the electronic key 10. Even in this case, the user can be notified that the electronic key 10 has been dropped.

  Moreover, according to the vehicle electronic key system 1, the user has dropped the user by confirming that the electronic key 10 has been dropped after a predetermined time has elapsed after detecting that the electronic key 10 has been dropped. Notification can be made only when the user is not aware of the above, and unnecessary notification to the user can be prevented. Incidentally, when a notification is made immediately after detecting that the electronic key 10 has been dropped, the notification is made even if the user notices that the electronic key 10 has been dropped and picks it up, which is troublesome for the user.

  The vehicle electronic key system 2 according to the second embodiment will be described with reference to FIGS. 10 to 12, 2, and 4. FIG. 10 is a configuration diagram of an electronic key system for a vehicle according to the second embodiment. FIG. 11 is a block diagram showing the configuration of the vehicle-side ECU in the vehicle electronic key system according to the second embodiment. FIG. 12 is a list showing user notification means and use cases according to the distances between the electronic key, the vehicle, and the mobile phone according to the second embodiment.

  The vehicle electronic key system 2 establishes a network between the electronic key 50, the vehicle 60 (particularly, the vehicle-side ECU 70), the mobile phone 80, and the management center 90 after a predetermined time has elapsed since the user determined that the electronic key was dropped. Then, communication is performed, the distance between the three points between the electronic key 50, the vehicle 60, and the mobile phone 80 is analyzed, and a notification means for the user is selected based on the analysis result. In particular, the vehicle electronic key system 2 determines a user's destination from a car navigation system (hereinafter referred to as “car navigation”) installed in the vehicle 60 as one of notification means, and sends the purpose to the management center 90. The location is notified and the management center 90 notifies the destination.

  The electronic key 50 has the same function as the electronic key 10 according to the first embodiment and has the same configuration. The mobile phone 80 has the same function as the mobile phone 40 according to the first embodiment, and has the same configuration. Therefore, descriptions of the electronic key 50 and the mobile phone 80 are omitted.

  The configuration of the vehicle side ECU 70 will be described with reference to FIG. The vehicle-side ECU 70 has at least functions related to security of the electronic key 50 (communication with the electronic key 50, communication with the mobile phone 80, communication with the management center 90, acquisition of the current position, measurement of distance between three points, user notification processing, etc.). Have. Therefore, the vehicle-side ECU 70 includes a microcomputer 71, a car navigation system 72, a door lock 74, a steering lock 75, a transmission circuit 76 (transmission antenna 76a), a reception circuit 77 (reception antenna 77a), and a GPS reception circuit 78 (GPS reception antenna 78a). It has. In the second embodiment, the processing in the GPS receiving circuit 78 (GPS receiving antenna 78a) and the microcomputer 71 corresponds to the vehicle position acquisition means described in the claims, and each processing in the microcomputer 71 is patented. The distance calculation means, the selection means, and the destination acquisition means described in the claims correspond to the navigation device described in the claims, and the transmission circuit 76 (transmission antenna 76a) corresponds to the claims. It corresponds to the notification means described in.

  The microcomputer 71 has a ROM 71a and an EEPROM 71b. The ROM 71a stores a program relating to the security of the electronic key 50 (e.g., a three-point distance calculation process between the electronic key 10, the vehicle 20, and the mobile phone 40, a user notification process corresponding to the three-point distance). . In addition, the user alerting | reporting process according to this distance between 3 points | pieces is a process different from the user alerting | reporting process according to the distance between 3 points | pieces of the microcomputer 31 of vehicle side ECU30 which concerns on 1st Embodiment. The EEPROM 71b stores electronic key user information, mobile phone information held by the user, management center information, and the like. The microcomputer 71 executes each program stored in the ROM 71a and processes each program.

  The car navigation system 72 detects the current position of the vehicle 60, searches for a route to the destination set by the user, and provides route guidance so that the vehicle travels along the route. Therefore, in the car navigation 72, when the user has set a destination, the destination information is registered. In addition, about the present position information acquisition of the vehicle 60, you may use what was detected with the car navigation system 72. FIG.

  The door lock 74 and the steering lock 75 are the same as the door lock 34 and the steering lock 35 according to the first embodiment.

  The transmission circuit 76 is a transmission circuit for transmitting various signals to the electronic key 50, the mobile phone 80, and the management center 90. The transmission circuit 76 is connected to the transmission antenna 76a. The transmission antenna 76a is a transmission antenna for transmitting various signals to the electronic key 50, the mobile phone 80, and the management center 90. The signal transmitted to the electronic key 50 includes a buzzer sound output request signal. As a signal to be transmitted to the mobile phone 80, there is an email notifying that the electronic key 50 has been dropped. Signals transmitted to the management center 90 include an electronic key drop signal and destination information. The reception circuit 77 and the reception antenna 77a are the same as the reception circuit 37 and the reception antenna 37a according to the first embodiment, and receive the same signals. The GPS receiving circuit 78 and the GPS receiving antenna 78a are the same as the GPS receiving circuit 38 and the GPS receiving antenna 38a according to the first embodiment, and receive the same signals.

  The management center 90 is a center that manages a vehicle to be serviced, for example, a center operated by an automobile company. The management center 90 has a communication function with each vehicle 60 and an arbitrary facility. One of the services performed at the management center 90 is a service that notifies the user's destination that the user has dropped the electronic key 50 in response to a request from the vehicle 60. This service is performed by the operator. This service may be automatically performed by a computer.

  With reference to FIG. 12, the notification means to a user according to the distance X between the electronic key 50 and the vehicle 60, the distance Y between the electronic key 50 and the mobile phone 80, and the distance Z between the vehicle 60 and the mobile phone 80 will be described. Here, the distance is expressed as large, small, or indefinite. The description here is the same as the eight cases described in the first embodiment.

  When the distance X is large (or undefined), the distance Y is large (or undefined), and the distance Z is large (or undefined), the distance X is large (or undefined), the distance Y is large (or undefined), and the distance Z is When the distance X is small and the distance X is large (or undefined), the distance Y is small and the distance Z is large (or undefined), the distance X is small and the distance Y is large (or undefined) and the distance Z is large (or undefined) ), A use case can be specified for each case where the distance X is small, the distance Y is small, and the distance Z is small. In this case, as the user notification means, the destination information registered in the car navigation system is notified to the management center and the destination is notified from the management center. In this case, a mail may be sent to the mobile phone 80 or a buzzer of the electronic key 50 may be sounded. In particular, when the destination information is not registered in the car navigation system, such notification means is used.

  When the distance X is large (or indefinite), the distance Y is small, and the distance Z is small, when the distance X is small, the distance Y is large (or indefinite), and the distance Z is small, the distance X is small and the distance Y is small. If it is small and the distance Z is large (or indefinite), the use case cannot be specified. In this case, as user notification means, a mail is transmitted to the mobile phone 80 or a buzzer of the electronic key 50 is blown. In this case, the destination information registered in the car navigation system may be reported to the management center.

  The operation of the vehicle electronic key system 2 will be described with reference to FIGS. In particular, the operation of the electronic key 50 will be described with reference to the flowchart of FIG. 6, the operation of the vehicle 60 (vehicle-side ECU 70) will be described with reference to the flowchart of FIG. 9 will be described, the operation at the management center 90 will be described with reference to the flowchart of FIG. 14, and the overall operation flow of the vehicle electronic key system 2 will be described with reference to the time chart of FIG. . In the time chart of FIG. 15, “A” is the operation of the flowchart A of FIG. 6, “D” is the operation of the flowchart D of FIG. 13, and “C” is the operation of the flowchart C of FIG. "E" is the operation of the flowchart E in FIG.

  At certain time intervals, the electronic key 50 operates in the same manner as the operation along the flowchart A of FIG. 6 of the electronic key 10 according to the first embodiment. Further, in the vehicle 60, the operations from S50 to S55 in the flowchart D in FIG. 13 are the same as the operations from S30 to S35 in the flowchart B in FIG. 7 of the vehicle 20 according to the first embodiment. Further, the mobile phone 80 operates in the same manner as the operation along the flowchart C in FIG. 8 of the mobile phone 40 according to the first embodiment.

  The vehicle-side ECU 70 determines that the distance X is large (or indefinite), the distance Y is large (or indefinite), and the distance Z is large (or indefinite), or the distance X is large (or indefinite) in S55. When the distance Y is large (or undefined) and the distance Z is small, or when the distance X is large (or undefined), the distance Y is small and the distance Z is large (or undefined), or the distance X is small and When it is determined that the distance Y is large (or indefinite) and the distance Z is large (or indefinite), or the distance X is small, the distance Y is small, and the distance Z is small, the microcomputer 71 notifies the user. The destination information is determined to be reported to the management center 90, the destination information registered in the car navigation system 72 is acquired (S56, T20), and the transmission circuit 76 manages the electronic key drop signal and the destination information from the transmission antenna 76a. The data is transmitted to the center 90 (S56, T21).

  When the electronic key drop signal and the destination information are transmitted from the vehicle 60, the management center 90 receives the electronic key drop signal and the destination information (S60). The management center 90 determines whether or not the electronic key drop signal is “present” (S61). If it is determined in S61 that the electronic key drop signal is “none”, the current operation is terminated without performing the process. When it is determined in S61 that the electronic key drop signal is “present”, in the management center 90, the operator contacts the facility at the user's destination based on the destination information, and the facility operator is informed of the in-facility A person who is present (for example, indicating the name of the user information, vehicle information, etc.) requests that the electronic key 50 be dropped (S62). For example, as shown in FIG. 10, the user U is announced from the in-store speaker of the facility 100 at the user's destination. In this case, the user notices that the electronic key 50 has been dropped due to the announcement or the like.

  If it is determined in S55 that the relationship between the distance X, the distance Y, and the distance Z is other than the above, the microcomputer 71 determines that the buzzer sound of the electronic key 50 or the e-mail transmission to the mobile phone 80 is given to the user. The transmission circuit 76 transmits a buzzer sounding request from the transmission antenna 76a to the electronic key 50 (S57, T22), or the transmission circuit 76 sends a mail notifying the mobile phone 80 that the electronic key 50 has been dropped from the transmission antenna 76a. Transmit (S57, T23). When the buzzer sounding request is transmitted from the vehicle 60, the receiving circuit 17 receives the buzzer sounding request from the vehicle 60 by the receiving antenna 17a in the electronic key 50, and sounds the buzzer sound. Alternatively, when a mail is transmitted from the vehicle 60, the reception circuit 43 receives the mail from the vehicle 60 through the reception antenna 43 a in the mobile phone 80. In this case, the user notices that the electronic key 50 has been dropped by the buzzer of the electronic key 50 or the mail received by the mobile phone 80.

  This vehicle electronic key system 2 has the same effect as the vehicle electronic key system 1 according to the first embodiment. In particular, in the vehicle electronic key system 2, when the user's destination is known, the destination information is notified to the management center 90, and the user is notified at the destination via the management center 90. Thus, more appropriate notification can be given to the user.

  As mentioned above, although embodiment which concerns on this invention was described, this invention is implemented in various forms, without being limited to the said embodiment.

  For example, in this embodiment, the electronic key system for a vehicle includes at least an electronic key, a vehicle, and a mobile phone, and a notification method is selected according to three distances between the electronic key, the vehicle, and the mobile phone. However, the electronic key system for a vehicle including at least the electronic key and the vehicle may be configured to select the notification method according to the distance between the electronic key and the vehicle.

  Further, in the present embodiment, the distance between the three points is calculated and the notification method is selected according to the distance between the three points and the notification request is made by the vehicle. You may carry out except vehicles.

  In the present embodiment, the mobile phone held by the user is used as one of the notification means, but another mobile terminal held by the user (that can communicate with the vehicle) may be used.

  In the present embodiment, the alarm method and the hazard blinking are used as the notification method in the vehicle, but other methods may be used as the notification method in the vehicle.

  Further, in the present embodiment, the notification means by the vehicle alarm sound and hazard flashing as the user notification means and the notification means for reporting the user's destination to the management center are different from each other, but both notification means as the user notification means. The appropriate notification means may be selected from these user notification means.

  DESCRIPTION OF SYMBOLS 1, 2 ... Electronic key system for vehicles, 10, 50 ... Electronic key, 11 ... Microcomputer, 11a ... ROM, 11b ... EEPROM, 12 ... Vibration sensor, 13 ... Lock button, 14 ... Unlock button, 15 ... Buzzer, 16 ... Transmission circuit, 16a ... Transmission antenna, 17 ... Reception circuit, 17a ... Reception antenna, 18 ... GPS reception circuit, 18a ... GPS reception antenna, 20,60 ... Vehicle, 30,70 ... Vehicle side ECU, 31,71 ... Microcomputer 31a, 71a ... ROM, 31b, 71b ... EEPROM, 32 ... alarm sound, 72 ... car navigation, 33 ... hazard, 34, 74 ... door lock, 35, 75 ... steering lock, 36, 76 ... transmission circuit, 36a, 76a Transmission antenna 37, 77 Reception circuit 37a, 77a Reception antenna 38, 78 GPS reception circuit 3 a, 78a ... GPS receiving antenna, 40, 80 ... mobile phone, 41 ... microcomputer, 41a ... ROM, 41b ... EEPROM, 42 ... transmitting circuit, 42a ... transmitting antenna, 43 ... receiving circuit, 43a ... receiving antenna, 44 ... GPS Reception circuit, 44a ... GPS reception antenna, 90 ... management center.

Claims (5)

An electronic key system for a vehicle that notifies a user when a user drops an electronic key used in a vehicle,
Determining means for determining whether or not the electronic key has fallen based on vibration detected by a vibration sensor provided in the electronic key;
Electronic key position acquisition means for acquiring position information of the electronic key;
Vehicle position acquisition means for acquiring position information of the vehicle;
If the determination means determines that the electronic key has been dropped, the electronic key is based on the position information of the electronic key acquired by the electronic key position acquisition means and the position information of the vehicle acquired by the vehicle position acquisition means. A distance calculating means for calculating a distance between the vehicle and the vehicle;
Selection means for selecting a notification method to the user according to the distance calculated by the distance calculation means;
With
An electronic key system for a vehicle characterized by notifying a user by the notification method selected by the selection means when the determination means determines that the electronic key has dropped. A detection detection means for detecting that the electronic key is picked up when the electronic key is dropped,
2. The vehicle electronic device according to claim 1, wherein when the pick-up detection unit does not detect that the electronic key has been picked up for a threshold time or longer, the notification is made to the user by the notification method selected by the selection unit. Key system. Comprising mobile terminal position acquisition means for acquiring position information of the user's mobile terminal;
The distance calculation means, when it is determined that the electronic key has been dropped by the determination means, the position information of the electronic key acquired by the electronic key position acquisition means and the portable terminal acquired by the portable terminal position acquisition means The distance between the electronic key and the portable terminal is calculated based on the position information, and the position information of the vehicle acquired by the vehicle position acquisition means and the position of the portable terminal acquired by the portable terminal position acquisition means Calculating a distance between the vehicle and the mobile terminal based on the information;
The said selection means selects the alerting | reporting method to a user according to each distance between the said electronic key calculated by the said distance calculation means, the said vehicle, and the said portable terminal, The Claim 1 or Claim characterized by the above-mentioned. The electronic key system for vehicles according to 2.   When the distance between the electronic key calculated by the distance calculation unit and the vehicle is equal to or less than a threshold distance, the selection unit selects a notification method using at least one of an alarm sound of the vehicle and an alarm light. The vehicle electronic key system according to any one of claims 1 to 3. Destination acquisition means for acquiring destination information registered in a navigation device mounted on the vehicle;
Notification means for notifying the destination information acquired by the destination acquisition means to a center that manages the vehicle;
With
The said selection means selects the alerting | reporting method which notifies the said destination information to the said center by the said notification means, when the destination information can be acquired by the said destination acquisition means. 5. The vehicle electronic key system according to any one of 4 above.

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