JP5612538B2 - Terminal position determination system - Google Patents

Description

  The present invention relates to a terminal position determination system that determines the inside / outside position of a terminal using sound waves.

  Conventionally, many vehicles are equipped with an electronic key system that performs key verification wirelessly using an electronic key. An electronic key system includes a key operation-free system that executes ID collation by narrow-area wireless communication (communication distance: several meters) triggered by communication from a vehicle. In the key operation free system, an ID signal is transmitted to the electronic key by a request signal transmitted from the transmitter of the vehicle, ID collation is performed by this ID signal, and if the collation with the electronic key outside the vehicle is established, for example, a door If locking / unlocking is permitted / executed and ID verification with the electronic key in the vehicle is established, engine start is permitted.

  By the way, in the electronic key system, the electronic key is prevented from being taken out of the vehicle when the ignition switch of the vehicle is powered on (for example, ACC on or IG on) (see Patent Document 1). If the electronic key is taken out of the vehicle while the ignition switch is turned on, there is a concern that the vehicle may run with the electronic key left outside the vehicle. In this case, the next engine start operation is impossible. Because it becomes. Whether or not the electronic key is present in the vehicle is determined by checking whether or not the ID verification with the electronic key in the vehicle is established when the ignition switch is powered on.

JP 2008-106579 A

  By the way, in recent years, it has been studied to use a mobile phone that is always carried by a user as an electronic key of a vehicle. For example, since FeliCa (registered trademark) and Bluetooth (registered trademark) are often mounted on mobile phones, ID verification is performed using these communication infrastructures. However, in the system using the mobile phone as an electronic key, the function of monitoring the mobile phone being taken out of the vehicle has not been studied, and some measures have been required. This problem is not limited to a mobile phone having a key function, but is the same for a mobile phone having no key function and other terminals.

  An object of the present invention is to provide a terminal position determination system capable of determining the inside / outside position of a terminal in order to prevent the terminal from being left outside the vehicle, for example, when an ignition switch of a vehicle is on.

In order to solve the above problems, in the present invention, in a terminal position determination system for determining whether a terminal having sound collection means is located inside or outside a vehicle, an external sound wave signal that outputs a sound wave signal outside the vehicle The transmitting means, the in-vehicle sound signal transmitting means for outputting the sound wave signal to the inside of the vehicle, the external sound wave signal and the in-vehicle sound signal that are distinguished from each other are received by the terminal, and the strength of the outside sound wave signal and the in-vehicle sound wave signal is compared By doing so, the gist is provided with position determining means for determining the position of the terminal when the ignition switch of the vehicle is on.

  According to the configuration of the present invention, the terminal receives the sound wave signal from the in-vehicle sound wave signal transmitting unit at a high signal level when it exists inside the vehicle, and receives the sound wave signal from the outside sound wave signal transmitting unit when it exists outside the vehicle. Receive at high signal level. Therefore, it is possible to determine the position of the terminal by comparing the strength when these sound wave signals are input at the terminal, so it is possible to determine whether the terminal is located inside or outside the vehicle. Become. Therefore, for example, it is possible to detect the terminal being taken out of the vehicle when the ignition switch of the vehicle is turned on, or the unintended dropping of the terminal outside the vehicle.

  The gist of the present invention is that it includes a warning execution means for warning the user when the ignition switch of the vehicle is on and the terminal is located outside the vehicle. According to this configuration, the warning execution means can notify the user that the terminal has been taken out of the vehicle while the ignition switch of the vehicle is on. Therefore, the user can take actions such as returning the terminal into the vehicle. It can be imposed on.

  The gist of the present invention is that the terminal is a terminal with a key function that functions as an electronic key of the vehicle. According to this configuration, since it is possible to monitor whether the terminal with the key function is left outside the vehicle, for example, it is possible to prevent the vehicle from restarting while the terminal with the key function is left outside the vehicle. Therefore, after the vehicle restarts, for example, when the vehicle arrives at the destination, a situation where there is no key at hand is avoided, and this is highly effective.

  The gist of the present invention is that the external sound wave signal transmitting means is also used as an electronic sound generating device for notifying the presence of the vehicle itself by sound. According to this configuration, since the electronic sound generator is also used for the function of determining the position of the terminal, the number of components mounted on the vehicle can be reduced.

  In the present invention, an activation request notification is provided in the vehicle, and when the ignition switch of the vehicle is turned on, an activation request signal for activating the function of determining the position of the terminal is wirelessly notified from the vehicle to the terminal. And a state switching means that is provided in the terminal and switches the position determination function to an activated state when the activation request signal is received from the vehicle. According to this configuration, the terminal position determination function does not need to be activated unnecessarily, so that the effect of power saving of the terminal is enhanced.

  According to the present invention, for example, in order to prevent the terminal from being left outside the vehicle when the ignition switch of the vehicle is on, the position of the terminal inside and outside the vehicle can be determined.

1 is a configuration diagram of a mobile phone car take-out monitoring system according to an embodiment. (A)-(c) is explanatory drawing which shows the mode of carrying out of the mobile phone outside the vehicle under the condition where the ignition switch of the vehicle is on. The wave form diagram which shows the change of the external sound wave signal and in-vehicle sound signal which a mobile telephone receives.

Hereinafter, an embodiment of a terminal location determination system embodying the present invention will be described with reference to FIGS.
As shown in FIG. 1, a vehicle 1 is equipped with a short-range wireless authentication system 3 that performs key collation by short-range wireless communication (communication distance: several tens of centimeters) with a mobile phone 2 having a key function. The near field communication is a kind of two-way communication near field wireless authentication in which the mobile phone 2 operates using electric waves from the vehicle 1 as power. For example, NFC (Near Field Communication) is used. Note that the mobile phone 2 corresponds to a terminal (terminal with a key function).

  The vehicle 1 is provided with a verification ECU 4 that performs ID verification with the mobile phone 2, a body ECU 5 that manages the power supply of the in-vehicle electrical components, and an engine ECU 6 that controls the engine 7. ing. An ID code used in short-range wireless authentication is registered in the memory (not shown) of the verification ECU 4. Connected to the verification ECU 4 are an in-vehicle reader / writer 9 that communicates with the mobile phone 2 outside the vehicle by short-range wireless communication, and an in-vehicle reader / writer 10 that communicates with the mobile phone 2 in the vehicle by short-range wireless communication. The outside reader / writer 9 and the inside reader / writer 10 transmit and receive radio waves in, for example, an LF (Low Frequency) band and an HF (High Frequency) band. Further, the outside reader / writer 9 is disposed, for example, on a door mirror or door trim, and the in-vehicle reader / writer 10 is disposed on a center console or the like in the vehicle.

  The body ECU 5 is connected to a door lock motor 11 serving as a drive source for locking and unlocking the vehicle door, and a push momentary engine switch 12 operated when switching the power state of the vehicle 1. The body ECU 5 is connected to an ACC (accessory) relay 13 connected to an in-vehicle accessory, an IG (ignition) relay 14 connected to a traveling system electrical component, and a starter relay 15 connected to a starter motor.

  The mobile phone 2 is provided with a terminal control unit 16 that controls various operations of the mobile phone 2. The terminal control unit 16 is provided with a main control unit 17 that controls a telephone call operation and an Internet communication operation in the mobile phone 2 and a key authentication processing unit 18 that operates the mobile phone 2 as an electronic key of the vehicle 1. An ID code used for short-range wireless authentication is registered in a memory (not shown) of the mobile phone 2 (key authentication processing unit 18). The ID code of the mobile phone 2 may be registered in advance in the mobile phone 2 or may be acquired from a server by network communication. The terminal control unit 16 is connected to a short-range communication unit 19 that transmits and receives radio waves according to short-range wireless communication.

  When the vehicle door is locked and unlocked by the mobile phone 2, an operation of holding the mobile phone 2 over the reader / writer 9 outside the vehicle is performed. The outside reader / writer 9 periodically transmits a driving radio wave Scc as power of the mobile phone 2. Therefore, the key authentication processing unit 18 is activated when receiving the driving radio wave Scc from the outside reader / writer 9 and transmits the ID signal Sid for near field wireless authentication when the outside near field wireless communication with the outside reader / writer 9 is established. To do. The ID signal Sid includes an ID code for short-range wireless authentication registered in the mobile phone 2. When the verification ECU 4 receives the ID signal Sid from the mobile phone 2, the verification ECU 4 performs vehicle near field wireless authentication using the ID code registered in itself. And if vehicle outside short-distance radio | wireless authentication is materialized, the door ECU5 will perform door lock locking / unlocking.

  Further, when it is detected by a courtesy switch (not shown) that the driver has boarded, for example, intermittent transmission of the drive radio wave Scc is started from the in-vehicle reader / writer 10 instead of the in-vehicle reader / writer 9. At this time, when the mobile phone 2 brought into the vehicle is held over the reader / writer 10 in the vehicle, the vehicle short-range wireless authentication is started. When the in-vehicle short-range wireless authentication is established, the power switch operation / engine start operation by the engine switch 12 is permitted.

  The vehicle 1 is provided with a mobile phone take-out monitoring system 20 that prevents the mobile phone 2 from being taken out of the vehicle 1 when the ignition switch of the vehicle 1 is on. The mobile phone take-out monitoring system 20 of this example uses sound waves to determine whether the mobile phone 2 is in the vehicle or outside the vehicle, and the mobile phone 2 is out of the vehicle even though the ignition switch is on. When it is confirmed that it has been taken out, a warning for taking out the vehicle is given to the user. Moreover, the ignition switch being on means a state in which, for example, the ACC relay 13 or the IG relay 14 is turned on. The mobile phone car take-out monitoring system 20 corresponds to a terminal position determination system.

  In this case, a vehicle exterior speaker 21 that transmits a sound wave signal (hereinafter referred to as a vehicle exterior sound wave signal Ssw1) to the vehicle 1 and a vehicle interior speaker 22 that transmits a sound wave signal (hereinafter referred to as a vehicle interior sound wave signal Ssw2) to the vehicle interior. And are provided. For example, when the vehicle 1 is a hybrid vehicle, an electronic sound generator that notifies the surroundings of the presence of the vehicle by sound is used as the outside speaker 21. The in-vehicle speaker 22 is an existing audio speaker installed in the vehicle. The speaker outside the vehicle 21 constitutes an acoustic signal transmission means outside the vehicle, and the speaker 22 inside the vehicle constitutes an acoustic signal transmission means inside the vehicle.

  The sound wave signals Ssw1 and Ssw2 may be either audible sounds that humans can hear or ultrasonic waves that humans cannot hear. The sound wave signals Ssw1 and Ssw2 are set to different frequencies so that they do not interfere with each other. The vehicle exterior sound wave signal Ssw1 is formed in an area that extends throughout the entire periphery of the vehicle 1. The in-vehicle sound wave signal Ssw2 is formed in an area that extends throughout the entire vehicle.

  The vehicle 1 is provided with a speaker control unit 23 that manages the operation of the outside speaker 21 and the inside speaker 22. When the on-signal (ignition on signal) is input from the ACC relay 13 or the IG relay 14, the speaker control unit 23 transmits sound wave signals Ssw 1 and Ssw 2 from the speakers 21 and 22. The sound wave signals Ssw1 and Ssw2 may be transmitted at all times while the ignition is on, or may be started when there is a possibility that the mobile phone 2 is taken out of the vehicle, for example, door opening / closing or window opening / closing. In addition, the speaker control part 23 comprises an external sound wave signal transmission means and an in-vehicle sound wave signal transmission means.

  The vehicle 1 and the mobile phone 2 can perform two-way communication by narrow-band wireless communication such as Bluetooth. In this case, the vehicle 1 is provided with a narrow-area wireless communication unit 24 that performs narrow-area communication on the vehicle 1 side, and this is connected to the body ECU 5. The mobile phone 2 is also provided with a similar narrow area wireless communication unit 25, which is connected to the terminal control unit 16.

  For example, when the ignition switch is turned on, the body ECU 5 is provided with an activation request notification unit 26 that activates the out-of-vehicle take-out monitoring function of the mobile phone 2. For example, when the activation request notifying unit 26 confirms that the ignition switch is turned on, the activation request notifying unit 26 causes the narrow area wireless communication unit 24 to transmit the activation request signal Son. The activation request signal Son is a radio wave equivalent to, for example, Bluetooth communication, and includes an ID for specifying the mobile phone 2 and a command for starting the mobile phone 2 take-out monitoring function. The activation request notification unit 26 corresponds to activation request notification means.

  The mobile phone 2 is provided with a microphone 27 that collects sound wave signals Ssw1 and Ssw2 output from the speakers 21 and 22. The microphone 27 is a microphone that collects sound during a call on the mobile phone 2, and is shared by the call function of the mobile phone 2 and the out-of-vehicle take-out monitoring function of the mobile phone 2. The microphone 27 outputs the collected sound wave data Dsw to the terminal control unit 16. When the mobile phone 2 receives the activation request signal Son from the vehicle 1, the microphone 27 switches from the stopped state to the activated state. The sound wave data Dsw includes vehicle exterior sound wave data Dsw1 conforming to the vehicle exterior sound wave signal Ssw1 and vehicle interior sound wave data Dsw2 conforming to the vehicle interior sound wave signal Ssw2. The microphone 27 corresponds to sound collecting means.

  The terminal control unit 16 is provided with a state switching unit 28 that activates the out-of-vehicle take-out monitoring function of the mobile phone 2 based on the activation request signal Son transmitted from the vehicle 1. When the activation request signal Son is received by the narrow-area wireless communication unit 25, the state switching unit 28 operates according to the instruction of the activation request signal Son and activates the mobile phone 2 take-out monitoring function. The out-of-car taking-out monitoring function of the mobile phone 2 refers to, for example, the microphone 27 and various functional units described later. The state switching unit 28 corresponds to a state switching unit.

  The terminal control unit 16 is provided with a sound wave signal acquisition unit 29 for acquiring sound wave data Dsw1 and Dsw2 obtained by the microphone 27. When acquiring the sound wave data Dsw, the sound wave signal acquisition unit 29 identifies whether the sound wave data Dsw is the vehicle exterior sound wave data Dsw1 or the vehicle interior sound wave data Dsw2 based on the frequency of the sound wave data Dsw. The sound wave signal acquisition unit 29 constitutes a position determination unit.

  The terminal control unit 16 is provided with a position determination unit 30 that determines the position of the mobile phone 2 based on the sound wave data Dsw1 and Dsw2 acquired by the sound wave signal acquisition unit 29. For example, the position determination unit 30 compares the strengths of the vehicle exterior sound wave data Dsw1 and the vehicle interior sound wave data Dsw2, and determines whether the mobile phone 2 is located inside or outside the vehicle based on the comparison result. The position determination unit 30 constitutes a position determination unit.

  The terminal control unit 16 is provided with a terminal side warning operation execution unit 31 that executes a warning operation on the mobile phone 2 side when the mobile phone 2 is taken out of the vehicle under the ignition switch-on condition. The terminal side warning operation execution unit 31 warns the mobile phone 2 to be taken out of the vehicle, for example, on the screen or speaker of the mobile phone 2. In addition, the terminal-side warning operation execution unit 31 transmits a take-out notification signal Sk outside the vehicle via the narrow-range wireless communication unit 25 when the warning operation is performed also in the vehicle 1. The vehicle outside take-out notification signal Sk is a command for notifying the vehicle 1 that the mobile phone 2 has been taken out of the vehicle. The terminal side warning operation execution unit 31 constitutes a warning execution unit.

  The body ECU 5 is provided with a vehicle-side warning operation executing unit 32 that executes a warning operation on the vehicle 1 side when the mobile phone 2 is taken out of the vehicle under the ignition switch-on condition. When the vehicle-side warning operation execution unit 32 receives the vehicle outside notification signal Sk from the mobile phone 2 through narrow-area wireless communication, the vehicle-side warning operation execution unit 32 executes a warning operation on the vehicle 1 side. In addition, the vehicle side warning operation execution part 32 comprises a warning execution means.

Next, the operation of the mobile phone carrying-out monitoring system 20 of this example will be described with reference to FIGS.
As shown in FIG. 2 (a), when the narrow area wireless communication unit 24 of the vehicle 1 confirms that the ignition switch of the vehicle 1 is turned on, the narrow area wireless communication unit 24 sends the activation request signal Son to the mobile phone via Bluetooth communication, for example. 2 to send. When the state switching unit 28 receives the activation request signal Son from the vehicle 1, the state switching unit 28 switches the carry-out monitoring function of the mobile phone 2 from the standby state until then to the activated state. As a result, the various functional units related to the take-out monitoring function of the mobile phone 2 and the microphone 27 are activated, and the out-of-vehicle take-out monitoring function in the mobile phone 2 becomes effective.

  Subsequently, as shown in FIG. 2B, when the speaker control unit 23 confirms that the ignition switch is turned on, the speaker control unit 23 starts transmission of the sound wave signals Ssw1 and Ssw2 from the vehicle exterior speaker 21 and the vehicle interior speaker 22. At this time, the mobile phone 2 receives the external sound wave signal Ssw1 and the internal sound wave signal Ssw2 with the microphone 27.

  Here, as shown in FIG. 2 (c), it is assumed that the mobile phone 2 is taken out of the vehicle while the ignition switch of the vehicle 1 is on. At this time, as shown in FIG. 3, the signal level (intensity level of the received signal) of each of the vehicle exterior acoustic signal Ssw1 and the vehicle interior acoustic signal Ssw2 received by the cellular phone 2 is initially determined as the cellular phone 2 is located in the vehicle. Therefore, the signal level of the in-vehicle sound wave signal Ssw2 is higher than the external sound wave signal Ssw1. Then, when the vehicle door is opened and the user gets off, the strength of the external acoustic wave signal Ssw1 and the internal acoustic wave signal Ssw2 are interchanged in the vicinity, and the signal level of the external acoustic wave signal Ssw1 is replaced in the vicinity where the vehicle door is closed. Becomes larger than the in-vehicle acoustic wave signal Ssw2.

  When the position determination unit 30 confirms that the signal levels of the vehicle exterior acoustic signal Ssw1 and the vehicle interior acoustic signal Ssw2 change as shown in FIG. 3, the position determination unit 30 recognizes that the mobile phone 2 has been taken out of the vehicle. That is, the position determination unit 30 initially has a signal level of the in-vehicle sound wave signal Ssw2 that is greater than or equal to the upper limit threshold value Eh and the in-vehicle sound wave signal Ssw1 is less than the lower limit threshold value El. When the signal level of the mobile phone 2 is equal to or higher than the upper limit threshold Eh and the signal level of the in-vehicle sound wave signal Ssw2 is changed to be less than the lower limit threshold El, the mobile phone 2 is recognized as being taken out of the vehicle.

  When the terminal side warning operation execution unit 31 recognizes that the mobile phone 2 is taken out of the vehicle under the ignition switch-on condition, the mobile phone 2 warns the user that the mobile phone 2 is taken out of the vehicle. Examples of the warning operation include a message warning on the screen of the mobile phone 2 and a voice warning using the speaker of the mobile phone 2.

  Further, when the vehicle 1 also issues a take-out warning, the terminal-side warning operation execution unit 31 transmits an out-of-vehicle take-out notification signal Sk to the vehicle 1 via narrow area wireless communication (Bluetooth communication). When the vehicle-side warning operation execution unit 32 receives the vehicle outside take-out notification signal Sk by the narrow area wireless communication unit 24, the vehicle-side warning operation execution unit 32 notifies the user that the mobile phone 2 is taken out of the vehicle. As this warning operation, for example, there is a warning that sounds a buzzer or a horn of the vehicle 1 or blinks a hazard.

  As described above, in this example, when the ignition switch of the vehicle 1 is on, the sound wave signals Ssw1 and Ssw2 are output from the vehicle speaker 22 and the vehicle speaker 22, respectively, and the mobile phone 2 collects the sound wave signals Ssw1 and Ssw2 with the microphone 27. Whether the mobile phone 2 is inside the vehicle or outside the vehicle is determined based on a change in intensity when sounding. Then, when it is confirmed that the mobile phone 2 has been taken out of the vehicle with the ignition switch turned on, the mobile phone 2 or the vehicle 1 warns the user that the mobile phone 2 has been taken out of the vehicle.

  Accordingly, since it is possible to notify the user that the mobile phone 2 has been taken out of the vehicle when the ignition switch is on, it is possible to cause the user to take an action such as returning the mobile phone 2 into the vehicle. Accordingly, since the vehicle 1 is prevented from restarting while the mobile phone 2 is left outside the vehicle, a situation in which the mobile phone 2 is not at hand after arriving at the destination is avoided.

According to the configuration of the present embodiment, the following effects can be obtained.
(1) When the mobile phone 2 is located in the vehicle, the mobile phone 2 is given a high-level in-vehicle acoustic signal Ssw2, and when the mobile phone 2 is located outside the vehicle, the mobile phone 2 has a high-level external acoustic signal. Since Ssw1 is given, the in-vehicle position of the mobile phone 2 can be determined by comparing the strengths of the sound wave signals Ssw1 and Ssw2. Therefore, it is possible to monitor the mobile phone 2 being taken out of the vehicle 1 when the ignition switch of the vehicle 1 is on, and when the vehicle 1 or mobile phone 2 warns the user when the vehicle is taken out, the ignition can be detected. It is possible to prevent the mobile phone 2 from being taken out of the vehicle under the switch-on condition.

  (2) When it is detected that the mobile phone 2 is taken out of the vehicle 1 under the ignition switch-on state, the vehicle 1 or the mobile phone 2 warns the user of this fact, so that this situation can be notified to the user. Therefore, an action such as returning the mobile phone 2 to the inside of the vehicle can be imposed on the user.

  (3) Since the mobile phone 2 having a key function is monitored for being taken out of the vehicle, it is prevented that the mobile phone 2 having the key function, that is, the key equivalent member is left outside the vehicle and the vehicle 1 is restarted. can do. Therefore, after the vehicle restarts, for example, when the vehicle arrives at the destination, a situation where there is no vehicle key is avoided, and it can be said that the effect is high in that respect.

  (4) If the electronic sound generator of the vehicle 1 is used as the outside speaker 21, the vehicle parts can be shared. Therefore, the number of parts mounted on the vehicle 1 can be reduced. This can be said similarly when an audio speaker is used as an in-vehicle speaker. This effect can be similarly obtained by using the microphone 27 of the mobile phone 2.

  (5) When the ignition switch of the vehicle 1 is turned on, the activation request signal Son is transmitted to the mobile phone 2 using narrow-area wireless communication (Bluetooth communication), and the activation request signal Son Activate the position determination function. Therefore, since it is not necessary to always activate the position determination function in the mobile phone 2, the effect of power saving of the mobile phone 2 is enhanced.

  (6) For example, when the cellular phone 2 is expected to be taken out of the vehicle, such as opening / closing of a vehicle door or opening / closing of a window glass, it is really necessary if transmission of sound wave signals Ssw1, Ssw2 is started from the speakers 21, 22 Only when the sound wave signals Ssw1 and Ssw2 can be transmitted. Therefore, the effect is high for power saving of the battery of the vehicle 1.

The embodiment is not limited to the configuration described so far, and may be modified as follows.
The position determination function of the mobile phone 2 and the microphone 27 are not limited to the start of activation by the activation request signal Son from the vehicle 1. For example, the mobile phone 2 may monitor the movement corresponding to taking it out of the vehicle and enter the activated state when this movement occurs. As an example of this, for example, a motion sensor (acceleration sensor) is provided in the mobile phone 2, and the position determination function of the mobile phone 2 and the microphone 27 are activated when the movement detected outside the vehicle is detected by this sensor.

  The position determination of the mobile phone 2 is not limited to the detection method based on whether or not the signal levels of the sound wave signals Ssw1 and Ssw2 change the waveform shown in FIG. It is good also as determination of. In short, as the position determination method, various methods can be used as appropriate.

The position determination function of the mobile phone 2 and the microphone 27 are not limited to those activated at the time of position determination, and may be always activated. In this case, the Bluetooth communication function becomes unnecessary.
The communication network for the activation request signal Son is not limited to Bluetooth communication, and other communication may be employed.

The sound wave signals Ssw1 and Ssw2 may be transmitted intermittently, for example.
The determination of the sound wave signals Ssw1 and Ssw2 is not limited to the method performed at the radio wave frequency. For example, the sound wave signals Ssw1 and Ssw2 may have the same frequency, and the transmission source may be identified by data in the signal.

  The vehicle 1 may be provided with another electronic key system. In the electronic key system, for example, a key operation free system that performs ID collation by narrow-area wireless communication (communication distance: several meters), triggered by communication from the vehicle 1, or by narrow-area wireless communication triggered by communication from the electronic key. There are wireless key systems that perform ID verification.

The warning operation is not limited to being performed by both the vehicle 1 and the mobile phone 2, and may be performed by only one of them.
The vehicle speaker 21 and the vehicle speaker 22 are not limited to diverting members previously mounted on the vehicle 1 but may be newly mounted members.

The number and installation positions of the outside speakers 21 and the inside speakers 22 can be changed as appropriate.
-The communication network of the outside take-out notification signal Sk is not limited to narrow area communication such as Bluetooth, and other communication can be used.

The values of the threshold values Eh and El can be changed as appropriate. The thresholds Eh and El may take different values depending on whether the mobile phone 2 is located inside the vehicle or outside the vehicle.
The system using the terminal as a key is not limited to a system using short-range wireless authentication communication, and may be a system using other communication.

The terminal is not limited to the mobile phone 2 having a key function, and may be a simple mobile phone having no key function. The terminal is not limited to the mobile phone 2 and may be, for example, an IC card.
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.

  (A) In any one of claims 1 to 5, the in-vehicle sound wave signal transmitting unit and the in-vehicle sound wave signal transmitting unit start outputting the sound wave signal when detecting that an in-vehicle device that passes inside and outside the vehicle is operated. To do. According to this configuration, it is possible to transmit a sound wave signal only when it is truly necessary, which contributes to power saving of the power source of the vehicle. In-vehicle devices include, for example, vehicle doors and window glasses.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Cell-phone as terminal (terminal with key function), 20 ... Cell-phone out-of-car monitoring system as terminal position determination system, 21 ... In-vehicle speaker as vehicle sound signal transmitting means, 22 ... In-car sound signal In-car speaker as transmitting means, 23... Speaker control unit constituting external sound wave signal transmitting means and in-vehicle sound signal transmitting means, 26. Activation request notifying part as activation request notifying means, 27. Microphone as sound collecting means, 28 A state switching unit as a state switching unit, 29 a sound wave signal acquisition unit that constitutes a position determination unit, 30 a position determination unit that constitutes a position determination unit, 31 a terminal side warning operation execution unit that constitutes a warning execution unit, 32 ... Vehicle-side warning operation execution unit constituting warning execution means, Ssw1, Ssw2 ... sound wave signal, Son ... start request signal.

Claims (5)

In the terminal position determination system for determining whether the terminal having the sound collecting means is located inside or outside the vehicle,
Vehicle sound wave signal transmitting means for outputting sound wave signals outside the vehicle;
In-vehicle sound wave signal transmitting means for outputting sound wave signals in the vehicle,
Determine the position of the terminal when the ignition switch of the vehicle is on by causing the terminal to receive the external acoustic signal and the in-vehicle acoustic signal that are distinguished from each other and comparing the strength of the external acoustic signal and the in-vehicle acoustic signal. And a terminal position determination system. 2. The terminal position determination system according to claim 1, further comprising: a warning execution unit that warns a user when the terminal is located outside the vehicle when the ignition switch of the vehicle is on. The terminal position determination system according to claim 1 or 2, wherein the terminal is a terminal with a key function that functions as an electronic key of the vehicle. The terminal position according to any one of claims 1 to 3, wherein the vehicle external sound wave signal transmitting unit is also used as an electronic sound generating device that notifies the vehicle of its presence by sound. Judgment system. An activation request notifying unit that is provided in the vehicle and that wirelessly notifies the terminal of an activation request signal that activates a function of determining the position of the terminal when an ignition switch of the vehicle is turned on;
5. The apparatus according to claim 1, further comprising a state switching unit that is provided in the terminal and switches the position determination function to an activated state when the activation request signal is received from the vehicle. The terminal position determination system described in 1.

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