WO2016002131A1 - Portable device and position detection system - Google Patents

Abstract

A portable device (2, 5) performs wireless communication with an in-vehicle device (15), and is provided with: an acquisition unit (S203, S503) that acquires signal intensity of the wireless communication; a first measuring unit (21) that measures acceleration of the portable device; and a first determining unit (S205, S505) that determines whether the portable device is in a determination area (4) around a vehicle. The first determining unit estimates a distance between the portable device and the vehicle, and determines that the portable device is not in the determination area in the cases where the distance is equal to or more than a first threshold value, and signal intensity is equal to or lower than a second threshold value. A position detection system is provided with the in-vehicle device (15) and the portable device (2, 5). The portable device is provided with the acquisition unit (S203, S503), the first measuring unit (21), and the first determining unit (S205, S505).

Description

Portable device and position detection system Cross-reference of related applications

This application is based on Japanese Patent Application No. 2014-138074 filed on July 3, 2014, the contents of which are incorporated herein by reference.

The present disclosure relates to a technique for determining the position of a mobile device with respect to a vehicle based on signal strength of wireless communication.

A technique is known in which a mobile device represented by a mobile phone or the like detects the position of the mobile device based on the signal strength of a radio signal from a base station (so-called RSSI (Received Signal Signal Strength Indicator)) (for example, Patent Document 1). In this technology, it is utilized that radio waves are attenuated according to the distance when propagating in the air, and the distance between the base station and the portable device is measured based on the signal strength of the radio signal. The position of is detected.

The inventors of the present application found the following.

The above technique can also be used to determine the position of the portable device with respect to the vehicle. That is, when the portable device and the in-vehicle device mounted on the vehicle perform wireless communication, and the user of the portable device forgets to lock the door or close the window when getting off the vehicle, the portable device can carry it from the in-vehicle device. That is notified to the device and the portable device is notified. This type of notification is preferably performed at a timing when the user completes the getting-off operation from the vehicle and leaves the vehicle. Therefore, based on the signal strength of the radio signal between the in-vehicle device and the portable device, the timing at which the portable device leaves the vehicle, in other words, the timing at which the portable device exits from a predetermined area (determination area) around the vehicle. To detect.

Specifically, for example, when the in-vehicle device measures the RSSI value (RSSI value) of the radio signal transmitted from the portable device, the portable device determines that the RSSI value has fallen below a predetermined threshold value. It can be determined that the vehicle has left the area.

However, the signal strength of the radio signal is easily affected by the shield. For example, a portable device in which the threshold value of the RSSI value is located on the boundary between the determination area and the outside when there is no shielding object such as a user's body (human body) between the in-vehicle device and the portable device It is assumed that the RSSI value α of the radio signal transmitted from is set.

If the user's body is between the in-vehicle device and the portable device, the radio wave radiated from the portable device is attenuated by the human body and reaches the in-vehicle device. As a result, even when the mobile device is present in the determination area, the RSSI value measured by the in-vehicle device may fall below the threshold value α.

Therefore, in this case, even if the mobile device exists in the determination area, even if the mobile device has been erroneously determined to have gone out of the determination area, the user has not left the vehicle. Information such as forgetting to lock the door is notified to the user. For this reason, the dispersion | variation in the timing (distance from a vehicle) alert | reported will become large.

Japanese Patent Publication No. 2012-255673

This disclosure is intended to provide a technique for suppressing erroneous determination that a mobile device has moved out of the determination area even though the mobile device is present in the determination area.

According to the first aspect of the present disclosure, the mobile device performs wireless communication with the in-vehicle device mounted on the vehicle, and includes an acquisition unit, a first measurement unit, and a first determination unit. The acquisition unit acquires the signal strength of wireless communication with the in-vehicle device. The first measurement unit measures the acceleration of the portable device. The first determination unit determines whether or not the portable device is present in a determination area around the vehicle based on the signal intensity acquired by the acquisition unit and the acceleration measured by the first measurement unit. To do. The first determination unit estimates the distance between the portable device and the vehicle based on the acceleration, the distance is equal to or greater than the first threshold value, and the signal strength is equal to or less than the second threshold value. In some cases, it is determined that the portable device does not exist within the determination area.

According to the second aspect of the present disclosure, the position detection system includes an in-vehicle device mounted on a vehicle and a portable device that performs wireless communication with the in-vehicle device. The portable device includes an acquisition unit, a first measurement unit, and a first determination unit. The acquisition unit acquires the signal strength of wireless communication with the in-vehicle device. The first measurement unit measures the acceleration of the portable device. The first determination unit determines whether or not the portable device is present in a determination area around the vehicle based on the signal intensity acquired by the acquisition unit and the acceleration measured by the first measurement unit. To do. The first determination unit estimates the distance between the portable device and the vehicle based on the acceleration, the distance is equal to or greater than the first threshold value, and the signal strength is equal to or less than the second threshold value. In some cases, it is determined that the portable device does not exist within the determination area.

According to the portable device and the position detection system, even if the portable device exists in the determination area, even if the signal strength is equal to or lower than the second threshold value, the distance estimated based on the acceleration is the first If it is not greater than or equal to the threshold value, it is possible to suppress erroneous determination that the mobile device has gone out of the determination area. Therefore, it is possible to suppress variations between the timing at which the mobile device is determined to have moved out of the determination area from the determination area and the timing at which the mobile device has actually moved out of the determination area.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. In the attached drawings
FIG. 1 is a block diagram illustrating configurations of a vehicle and a portable device in the first embodiment. FIG. 2 is a diagram showing a determination area around the vehicle, FIG. 3 is a flowchart showing the information transmission process of the first embodiment. FIG. 4 is a flowchart showing the vehicle information notification process of the first embodiment. FIG. 5 is a flowchart showing the determination logic of the first embodiment. FIG. 6 is a block diagram showing the configuration of the vehicle and the portable device in the second embodiment. FIG. 7 is a flowchart showing the determination logic of the second embodiment. FIG. 8 is a flowchart showing the vehicle information notification process of the third embodiment. FIG. 9 is a flowchart showing the information transmission process of the third embodiment.

Hereinafter, embodiments will be described with reference to the drawings.

[1. First Embodiment]
[1-1. Constitution]
As shown in FIG. 1, the vehicle 1 of the first embodiment includes a door lock sensor 101, a door opening / closing sensor 102, a window opening / closing sensor 103, a headlight switch 104, a small light switch 105, a hazard lamp switch 106, an ignition switch 107, A door lock actuator 108, a body ECU 11, a smart key communication unit 12, a verification ECU 13, an in-vehicle device 15, and an antenna (also referred to as a vehicle antenna) 16 are provided. The body ECU 11, the verification ECU 13, and the in-vehicle device 15 are connected to a common bus 14, and these perform mutual communication according to, for example, a CAN (Controller Area Network) protocol.

The door lock sensor 101 and the door opening / closing sensor 102 are provided on each of the doors provided in the vehicle 1 (in this embodiment, a driver seat door, a passenger seat door, a rear seat door, and a back door). The door lock sensor 101 detects the unlocked state of each door. The door open / close sensor 102 detects the open / closed state of each door.

The window opening / closing sensor 103 is provided in the driver's seat door, the passenger seat door, and the rear seat door, and detects the opening / closing state of the window provided in each door.

The headlight switch 104 controls the operation (lighting and extinguishing) of the headlight provided in the vehicle 1. The small light switch 105 controls the operation (lighting and extinguishing) of the small light provided in the vehicle 1. The hazard lamp switch 106 controls the operation (flashing and extinguishing) of the hazard lamp provided in the vehicle 1. The ignition switch 107 controls the operation (on and off) of the ignition provided in the vehicle 1.

The body ECU 11 includes a known microcomputer centered on a CPU, a ROM, and a RAM, and acquires information detected by various sensor switches 101 to 107. The ECU means an electronic control device.

The door lock actuator 108 is provided in each of the driver door, the passenger door, the rear seat door, and the back door, and locks and unlocks each door based on an instruction from the body ECU 11.

The smart key communication unit 12 periodically transmits a polling signal into the vehicle 1 and receives an ID code wirelessly transmitted as a return signal from the mobile key (smart key) that has received the polling signal.

The verification ECU 13 includes a well-known microcomputer centered on a CPU, ROM, and RAM, and acquires an ID code from the smart key communication unit 12. The verification ECU 13 detects a state in which the ID code is received by the smart key communication unit 12 as a state in which the smart key exists in the vehicle 1.

The in-vehicle device 15 includes a communication unit (corresponding to a communication unit of the in-vehicle device) 151 and a control unit 152.

The communication unit 151 includes a BT communication function for performing wireless communication using Bluetooth (registered trademark, hereinafter referred to as BT), which is one of the short-range wireless communication standards, and the portable device 2 having the BT communication function and the antenna 16. Wireless communication is performed via Examples of the mobile device 2 having the BT communication function include a mobile phone and a smartphone. In addition, the communication unit 151 measures the signal strength value (RSSI value) of the radio signal transmitted from the mobile device 2.

The control unit 152 includes a known microcomputer centered on a CPU, ROM, and RAM, and acquires an RSSI value from the communication unit 151.

From the body ECU 11, the control unit 152 receives information representing the unlocked state of each door of the vehicle 1, information representing the opened / closed state of each door of the vehicle 1, information representing the opened / closed state of each window of the vehicle 1, and the vehicle Information indicating the lighting / extinguishing state of one headlight and small light is acquired. In addition, the control unit 152 acquires information representing the blinking / unlit state of the hazard lamp of the vehicle 1 and information representing the on / off state of the ignition switch 107 of the vehicle 1 from the body ECU 11.

Further, the control unit 152 acquires information on whether or not the smart key exists in the vehicle 1 from the verification ECU 13. Hereinafter, the above information acquired by the control unit 152 from the body ECU 11 and the verification ECU 13 is collectively referred to as “vehicle information”.

Further, the control unit 152 periodically transmits the RSSI value and the vehicle information to the portable device 2 via the communication unit 151 by executing an information transmission process (FIG. 3) described later.

On the other hand, as shown in FIG. 1, the portable device 2 of the first embodiment includes an acceleration sensor 21, a communication unit (also referred to as a communication unit of a portable device) 22, an antenna (antenna of the portable device) 23, a display unit 24, and A control unit 25 is provided.

The acceleration sensor 21 measures the acceleration of the mobile device 2. For example, when a user 3 (see FIG. 2) such as a driver walks with the portable device 2, the portable device 2 vibrates with the movement of the user 3, and the acceleration due to the vibration is measured by the acceleration sensor 21. The

The communication unit 22 has a BT communication function, and performs wireless communication with the in-vehicle device 15 via the antenna 23.

The display unit 24 includes a display screen and displays an image (including characters) according to an instruction from the control unit 25.

The control unit 25 includes a known microcomputer centered on a CPU, ROM, and RAM. The control unit 25 acquires acceleration from the acceleration sensor 21 and acquires the RSSI value and vehicle information transmitted from the in-vehicle device 15 via the communication unit 22. Moreover, the control part 25 performs the vehicle information alerting | reporting process (FIG. 4) mentioned later based on an acceleration, an RSSI value, and vehicle information.

[1-2. processing]
Next, information transmission processing performed by the control unit 152 of the in-vehicle device 15 will be described with reference to FIG. The information transmission process is executed by executing the vehicle information notification process (FIG. 4). That is, when the vehicle information notification process is started, a wireless communication link is established between the portable device 2 and the in-vehicle device 15, and the information transmission process is started after the link is established.

First, the control unit 152 determines whether or not there is a link loss (link disconnection associated with a radio wave environment change or the like) in S101. When determining that there is a link loss (S101: YES), the control unit 152 ends the information transmission process.

On the other hand, when it determines with there being no link loss (S101: NO), the control part 152 acquires an RSSI value from the communication part 151, and acquires vehicle information from various ECU of body ECU11 and collation ECU13 (S102). . And the control part 152 transmits the acquired RSSI value and vehicle information to the portable apparatus 2 via the communication part 151 (S103).

Subsequently, the control unit 152 determines whether or not there is a link loss in S104. If it is determined that there is a link loss (S104: YES), the information transmission process is terminated. When determining that there is no link loss (S104: NO), the control unit 152 determines whether the communication unit 151 has received a link disconnection command transmitted from the portable device 2 (S105). The link disconnection command here is information transmitted from the mobile device 2 and is information indicating that the link is to be disconnected, and the control unit 25 of the mobile device 2 executes vehicle information notification processing (FIG. 4) described later. To be transmitted.

If the control unit 152 determines that the communication unit 151 has received the link disconnection command (S105: YES), the control unit 152 disconnects the link (S106) and ends the information transmission process.

On the other hand, if the control unit 152 determines that the communication unit 151 has not received the link disconnection command (S105: NO), the control unit 152 returns to S102 and repeats the processing after S102 described above. Therefore, unless the link loss occurs and the communication unit 151 does not receive the link disconnection command, the RSSI value and the vehicle information are periodically transmitted from the in-vehicle device 15 to the portable device 2.

Next, vehicle information notification processing performed by the control unit 25 of the portable device 2 will be described with reference to FIG. The vehicle information notification process is started when a dedicated application is activated in the mobile device 2. The application is assumed to be started before the user 3 gets on the vehicle 1 and before getting off. While the application is activated, the control unit 25 constantly counts the integrated value of the movement amount of the user 3 (the number of steps moved by the user 3) based on the acceleration acquired from the acceleration sensor 21.

First, the control unit 25 sets the notification flag to 0 (S201). Here, the notification flag is a flag indicating whether notification (S208) described later is performed. A notification flag of 1 indicates that notification is being performed, and a notification flag of 0 indicates that notification is not being performed.

Next, the control unit 25 determines whether or not there is a link loss (S202). When it is determined that there is no link loss (S202: NO), the RSSI value and vehicle information transmitted from the in-vehicle device 15 are determined. Obtained via the communication unit 22 (S203).

Subsequently, the control unit 25 determines whether or not there is a link loss (S204). When it is determined that there is no link loss (S204: NO), the control unit 25 determines that the mobile device 2 (and hence the user 3) is centered on the vehicle 1 based on a determination logic (FIG. 5) described later. It is determined whether or not it exists in area 4 (see FIG. 2) (S205).

When the control unit 25 determines in S205 that the mobile device 2 is present in the determination area 4 (S205: YES), the control unit 25 returns to S203 and repeats the above-described processing after S203.

On the other hand, the control unit 25 determines that the mobile device 2 does not exist in the determination area 4 (that is, determines that the mobile device 2 does not exist in the determination area 4), that is, the user 3 Is determined to have gone out of the determination area 4 from within the determination area 4 (S205: NO), it is determined whether there is a notification factor (S206). The notification factor here means that an operation to be performed when the occupant gets out of the vehicle 1 is forgotten, for example, “forgotten” such as forgetting to lock the door or forgetting to close the door. The determination as to whether or not there is a notification factor is performed based on the vehicle information acquired in S203.

Further, when it is determined that there is a link loss in S202 (S202: YES), the control unit 25 skips the processes of S203 to S205 and performs the process of S206. Similarly, when it is determined that there is a link loss in S204 (S204: YES), the control unit 25 skips the process of S205 and performs the process of S206. Therefore, the control unit 25 performs the processing from S206 onward even when a link loss occurs when the mobile device 2 is present in the determination area 4.

When it is determined that there is a notification factor in S206 (S206: YES), the control unit 25 determines whether or not the notification flag is 1 (S207). When the control unit 25 determines that the notification flag is not 1 (S207: NO), the control unit 25 performs notification by displaying that there is a notification factor on the display unit 24 (S208). In other words, the determination area 4 is an area for determining the timing at which the “forgetting to perform” notification, in other words, the timing at which the user 3 gets off the vehicle 1 and leaves the vehicle 1. The notification continues to be executed until the notification is canceled in S212 described later. Moreover, the control part 25 sets a notification flag to 1 after a notification start (S209).

Subsequently, the control unit 25 determines whether or not there is a link loss (S210). If it is determined that there is a link loss (S210: YES), the vehicle information notification process is terminated.

On the other hand, if it is determined that there is no link loss (S210: NO), the control unit 25 returns to S203 and repeats the processing from S203 described above.

In addition, the control part 25 determines with there being an alerting | reporting factor again in S206, when the alerting | reporting factor is not eliminated by the process of S206 being performed again after the notification start (S206: YES). In that case, the control unit 25 determines that the notification flag is 1 in S207, that is, that the notification has already been performed (S207: YES), returns to S203, and repeats the processing after S203 described above.

On the other hand, if it is determined in S206 that there is no notification factor (S206: NO), the control unit 25 determines whether the notification flag is 1, that is, whether notification is being performed (S211). ). The case where there is no notification factor includes the case where there is no notification factor from the beginning and the case where the notification factor is removed after the start of notification.

When it is determined that the notification flag is 1 in S211, that is, when it is determined that the notification factor has been removed after the start of notification (S211: YES), the control unit 25 cancels the notification (S212), and the notification flag Is set to 0 (S213). And the control part 25 cut | disconnects a link and transmits a link cutting | disconnection command to the vehicle-mounted apparatus 15 via the communication part 22 (S214). Thereafter, the control unit 25 ends the vehicle information notification process.

On the other hand, when it is determined in S211 that the notification flag is not 1, that is, when it is determined that there is no notification factor (S211: NO), the control unit 25 skips the processing of S212 to S213 and performs the processing of S214. After having performed, a vehicle information alerting | reporting process is complete | finished.

Next, the determination logic executed in S205 will be described with reference to FIG.

First, the control unit 25 determines whether or not the ignition switch 107 of the vehicle 1 is OFF based on information indicating ON / OFF of the ignition switch 107 included in the vehicle information acquired in S203 (S301). When the control unit 25 determines that the ignition switch 107 is not off (that is, is on) (S301: NO), the control unit 25 determines that the portable device 2 (and thus the user 3) exists in the determination area 4.

On the other hand, when it is determined in S301 that the ignition switch 107 is OFF (S301: YES), the control unit 25 determines whether the count reset condition is satisfied (S302). In addition, the control part 25 is based on the opening / closing information showing the opening / closing state of each door (a driver's seat door, a passenger seat door, a rear seat door, and a back door) of the vehicle 1 included in the vehicle information acquired in S203. If it is determined that the door has been opened or closed, it is determined that the count reset condition is satisfied. The term “open / close” as used herein includes both a change from the closed state to the open state and a change from the open state to the closed state. For example, when the opening / closing information indicating the open state of the driver's seat door is acquired after the opening / closing information indicating the closed state of the driver's seat door is acquired, it is determined that the driver's seat door is opened and closed, and the count reset condition is satisfied. It is determined that

When it is determined that the count reset condition is satisfied in S302 (S302: YES), the control unit 25 resets the integrated value of the movement amount of the user 3 (the number of steps moved by the user 3) (S303). Since the count reset condition is satisfied at least when the user 3 performs a predetermined operation that triggers the getting off (that is, when the user 3 opens and closes the door when getting off the vehicle 1), the number of steps is At least when the user 3 gets off the vehicle.

Subsequently, the control unit 25 determines whether or not the number of steps counted since the last reset (that is, the current count value) is greater than or equal to a predetermined threshold value Th1 (S304). The threshold value Th1 is set, for example, based on the minimum number of steps necessary to get out of the determination area 4 after getting off the vehicle. If the control unit 25 determines in S302 that the count reset condition is not satisfied (S302: NO), it skips the process of S303 and executes the process of S304.

If the control unit 25 determines in step S304 that the number of steps is equal to or greater than the threshold value Th1 (S304: YES), whether or not the latest RSSI value acquired in step S203 is equal to or less than the predetermined threshold value Th2. Is determined (S305). The threshold value Th <b> 2 is, for example, the portable device 2 located on the boundary between the determination area 4 and the outside when there is no shielding object such as the body of the user 3 between the in-vehicle device 15 and the portable device 2. Is set with reference to the RSSI value of the radio signal transmitted from. When it is determined that the RSSI value is equal to or less than the predetermined threshold Th2 (S305: YES), the control unit 25 determines that the mobile device 2 is outside the determination area 4 and ends the determination logic of FIG. .

On the other hand, when the control unit 25 determines in S304 that the number of steps is not equal to or greater than the threshold value Th1 (S304: NO), or when it is determined in S305 that the RSSI value is not equal to or less than the threshold value Th2 (S305: NO). The portable device 2 determines that it exists in the determination area 4, and ends the determination logic of FIG.

[1-3. effect]
As described above, according to the first embodiment described in detail, the following effects can be obtained.

The mobile device 2 of the first embodiment performs wireless communication with the in-vehicle device 15 mounted on the vehicle 1, so that the mobile device 2 (and thus the user 3) can move from the determination area 4 to the outside of the determination area 4. It is determined whether or not. When the portable device 2 determines that the portable device 2 has gone out of the determination area 4, the state of the vehicle 1 is based on the vehicle information transmitted from the in-vehicle device 15, and the state of the vehicle 1 is forgotten to lock the door or the window. It is determined whether or not there is no “forgetting” (notification factor) such as forgetting to close. Moreover, the portable apparatus 2 alert | reports to the user 3, when it determines with the state of the vehicle 1 having a alerting | reporting factor.

The RSSI value measured by the in-vehicle device 15 may be equal to or less than the threshold value Th2 even when the portable device 2 exists in the determination area 4 due to a shield such as a human body. In such a case, when the mobile device 2 determines whether or not the mobile device 2 has moved out of the determination area 4 based on only the RSSI value, the mobile device 2 actually exists in the determination area 4. Nevertheless, an erroneous determination that the portable device 2 has gone out of the determination area 4 is performed. Therefore, the variation of the notified timing (degree of separation from the vehicle) becomes large.

On the other hand, the mobile device 2 of the first embodiment moves the mobile device 2 out of the determination area 4 based on the acceleration of the mobile device 2 (and thus the number of steps counted based on the acceleration) in addition to the RSSI value. Judgment is made as to whether or not it has come out.

Therefore, even if the RSSI value becomes equal to or less than the threshold value Th2 due to a shield such as a human body, the portable device 2 assumes that the portable device 2 has gone outside the determination area 4 if the number of steps is not equal to or greater than the threshold value Th1 Can be suppressed. As a result, variation between the timing at which the mobile device 2 is determined to have moved out of the determination area 4 from within the determination area 4 and the timing at which the mobile device 2 has actually moved out of the determination area 4 is suppressed (determination accuracy). Can be increased).

Further, when the portable device 2 determines that one of the doors of the vehicle 1 is opened or closed based on the opening / closing information indicating the opened / closed state of each door of the vehicle 1 transmitted from the in-vehicle device 15, the portable device 2 calculates the counted number of steps. Reset. Therefore, for example, even when the user 3 leaves the vehicle 1 after opening and closing the back door and unloading the baggage from the rear of the vehicle 1 after getting off, the number of steps taken until the user 1 goes to the rear of the vehicle 1 Is reset, and only the number of steps of movement leaving the vehicle 1 can be counted.

In the first embodiment, a system including the in-vehicle device 15 and the portable device 2 corresponds to an example of a position detection system. Further, S203 corresponds to an example of processing as an acquisition unit, and the acceleration sensor 21 corresponds to an example of a first measurement unit. S205 corresponds to an example of processing as the first determination unit. Moreover, opening and closing the door of the vehicle 1 corresponds to an example of a predetermined operation that triggers getting off, and a series of opening and closing information transmitted from the in-vehicle device corresponds to an example of operation information. S206 corresponds to an example of processing as the second determination unit and the third determination unit. Further, the vehicle information corresponds to an example of state information, and a state without a notification factor corresponds to an example of a predetermined state that should be realized when no occupant is present. The case where no occupant is present can also be called the case where no occupant is present. S208 corresponds to an example of processing as the first notification unit, and S212 corresponds to an example of processing as the second notification unit. S103 corresponds to an example of processing as an operation information transmission unit, an opening / closing information transmission unit, a signal intensity transmission unit, and a state information transmission unit, and the communication unit 151 corresponds to an example of a third measurement unit.

[2. Second Embodiment]
[2-1. Constitution]
Since the basic configuration of the second embodiment is the same as that of the first embodiment, the description of the common configuration will be omitted, and the description will focus on the differences. Moreover, the same code | symbol is used for a common structure.

The configuration of the vehicle 1 of the second embodiment is the same as that of the first embodiment.

On the other hand, the mobile device 5 of the second embodiment includes an acceleration sensor 21, a communication unit 22, an antenna 23, a display unit 24, a gyro sensor 51, and a control unit 52, as shown in FIG. That is, the mobile device 5 of the second embodiment is different from the mobile device 2 of the first embodiment in that it further includes a gyro sensor 51. The control unit 52 of the second embodiment has the same hardware configuration as the control unit 25 of the first embodiment, but the vehicle information notification process to be executed is different from that of the control unit 25.

The gyro sensor 51 measures the angular velocity of the portable device 5. For example, when the user 3 walks with the portable device 5 carried, the angular velocity of the portable device 5 may change with the movement of the user 3. The angular velocity that can change in this way is measured by the gyro sensor 51.

The control unit 52 has a function of acquiring an angular velocity from the gyro sensor 51 in addition to the same function as the control unit 25 of the first embodiment. Moreover, the control part 52 measures the angle change of the portable apparatus 5 per relatively short predetermined time (for example, 100 ms) by integrating the acquired angular velocity. The controller 52 executes a vehicle information notification process described later based on the acceleration, the RSSI value, the vehicle information, and the angle change.

[2-2. processing]
Next, vehicle information notification processing executed by the control unit 52 of the portable device 5 will be described. The vehicle information notification process executed by the controller 52 is the same except for the vehicle information notification process (FIG. 4) of the first embodiment and the determination logic (S205). Therefore, only the determination logic of the second embodiment will be described below with reference to FIG.

7 are the same processes as S301 to S305 in FIG. That is, the determination logic (FIG. 7) of the second embodiment is different from the determination logic (FIG. 5) of the first embodiment in that the process of S405 is added. Therefore, the description of S401 to S404 is omitted.

When determining that the number of steps is equal to or greater than the threshold value Th1 in S404 (S404: YES), the control unit 52 determines whether or not the latest measured angle change is equal to or less than the threshold value Th3 (S405). ). For example, when the user 3 who carries the portable device 5 is moving in a different direction, in other words, the threshold value Th3 is set based on an angle change that can be taken when the user 3 is not moving straight.

When it is determined that the angle change is equal to or less than the threshold value Th3 (S405: YES), the control unit 52 determines whether the RSSI value is equal to or less than the threshold value Th2 (S406). When the control unit 52 determines that the RSSI value is equal to or less than the threshold value Th2 (S406: YES), the control unit 52 determines that the portable device 5 exists outside the determination area 4, and ends the determination logic of FIG. .

On the other hand, if the control unit 52 determines that the number of steps is not equal to or greater than the threshold value Th1 (S404: NO), or determines that the angle change is not equal to or less than the threshold value Th3 (S405: NO), the mobile device 5 Determines that it exists in the determination area 4 and ends the determination logic of FIG. Similarly, when the control unit 52 determines that the RSSI value is not equal to or less than the threshold value Th2 (S406: NO), the control unit 52 determines that the portable device 5 exists in the determination area 4, and ends the determination logic of FIG. .

[2-3. effect]
According to the second embodiment described in detail above, the following effects are obtained in addition to the effects of the first embodiment described above.

The mobile device 5 of the second embodiment determines whether or not the mobile device 5 has moved out of the determination area 4 from the determination area 4 based on the angle change of the mobile device 5 in addition to the RSSI value and the number of steps. Do.

The number of steps is added if the user 3 is walking even if the user 3 does not leave the vehicle 1. For this reason, after the user 3 gets off the vehicle, instead of walking straight out of the determination area 4 and walking around the vehicle, the number of steps in the determination area 4 may exceed the threshold Th1. is there.

At that time, if the RSSI value becomes equal to or less than the threshold value Th2 due to a shield such as a human body, the number of steps becomes equal to or more than the threshold value Th1 even though the mobile device 5 exists in the determination area 4, and the RSSI value Falls below the threshold Th2.

However, even in the case described above, the portable device 5 of the second embodiment is not portable when the change in angle is not equal to or less than the threshold value Th3 (that is, when the user 3 frequently changes the direction of travel). It is determined that the device 5 exists in the determination area 4. Therefore, the mobile device 5 can suppress erroneous determination that the mobile device 5 has gone out of the determination area 4 if the angle change is not equal to or less than the threshold Th3 even in the above case. .

The configuration in the second embodiment that is common to the first embodiment corresponds to the configuration in the first embodiment. Moreover, in 2nd Embodiment, the system provided with the vehicle-mounted apparatus 15 and the portable apparatus 5 is equivalent to an example of a position detection system, and the gyro sensor 51 and the control part 52 are equivalent to an example of a 2nd measurement part.

[3. Third Embodiment]
[3-1. Constitution]
The hardware configuration of the third embodiment is the same as that of the first embodiment. That is, the hardware configuration of the vehicle 1 of the third embodiment and the hardware configuration of the portable device 2 are the same as those of the first embodiment. However, the vehicle information transmission process and the information transmission process executed in the third embodiment are different from those in the first embodiment. Therefore, only the vehicle information transmission process and the information transmission process of the third embodiment will be described below.

[3-2. processing]
First, vehicle information notification processing performed by the control unit 25 of the portable device 2 will be described with reference to FIG. S501 to S514 in FIG. 8 are the same as S201 to S214 in FIG. That is, the vehicle information notification process (FIG. 8) of the third embodiment is different from the vehicle information notification process (FIG. 4) of the first embodiment in that the processes of S515 to S516 are added. Therefore, the description of S501 to S514 is omitted.

When it is determined that there is no link loss in S510 (S510: NO), the control unit 25 determines whether there is forgetting to lock the door among the notification factors (S515).

If it is determined in S515 that the door has been forgotten to be locked (S515: YES), the control unit 25 transmits a locking command for locking the door to the in-vehicle device 15 via the communication unit 22 (S516). . After transmitting the locking command or when determining in S515 that the door is not forgotten to be locked (S515: NO), the control unit 25 returns to S503 and repeats the processing after S503.

Next, information transmission processing executed by the control unit 152 of the in-vehicle device 15 will be described with reference to FIG. S601 to S606 in FIG. 9 are the same as S101 to S106 in FIG. That is, the information transmission process (FIG. 9) of the third embodiment is different from the information transmission process (FIG. 3) of the first embodiment in that the processes of S607 to S608 are added. Therefore, the description of S601 to S606 is omitted.

When it is determined that there is no link loss in S604 (S604: NO), the control unit 152 determines whether the communication unit 151 has received a locking command (S607). When it is determined that the communication unit 151 has received the locking command (S607: YES), the control unit 152 causes the door lock actuator 108 to lock the door that is not locked (S608). If the door is locked in S608, the control unit 152 returns to S602 and repeats the processing from S602 onward.

Note that when the door is locked in S608, the content of the vehicle information transmitted in S603 changes. That is, the information indicating the unlocked state of each door of the vehicle 1 in the vehicle information represents that each door is locked. In addition, when the notification factor is only forgetting to lock the door, when the portable device 2 receives the vehicle information, it is determined that there is no notification factor in S506 of the vehicle information notification process (FIG. 8). It is released (S512).

On the other hand, if the control unit 152 determines in S607 that the communication unit 151 has not received the locking command (S607: NO), the control unit 152 executes the process of S605.

[3-3. effect]
According to the third embodiment described in detail above, the following effects can be obtained in addition to the effects of the first embodiment described above.

In the third embodiment, when there is a notification factor, the mobile device 2 can automatically shift the vehicle 1 to a state where the notification factor is removed, that is, a state where "forgetting to do" is eliminated. Determine. Note that the above determination corresponds to the determination (S515) as to whether or not the door lock is forgotten. In addition, when the portable device 2 determines that the vehicle 1 can automatically transition to the state where the notification factor is removed, that is, when it is determined that the door lock is forgotten, the notification factor is removed. Transition command information (locking command) for instructing the transition to the state is wirelessly transmitted to the vehicle 1.

And the vehicle 1 which received the locking command locks the door which is not locked. Therefore, in 3rd Embodiment, the user 1 can change to the state from which the alerting | reporting factor was removed automatically, without the user 3 returning to the vehicle 1. FIG.

The configuration in the third embodiment that is common to the first embodiment corresponds to the configuration in the first embodiment. In the third embodiment, S503 corresponds to an example of processing as an acquisition unit, and S505 corresponds to an example of processing as a first determination unit. S506 corresponds to an example of processing as the second determination unit and the third determination unit, and S508 corresponds to an example of processing as the first notification unit. S512 corresponds to an example of processing as a second notification unit, and S603 corresponds to an example of processing as an operation information transmission unit, an opening / closing information transmission unit, a signal strength transmission unit, and a state information transmission unit. Further, S515 corresponds to an example of processing as a fourth determination unit, S516 corresponds to an example of processing as a transition command transmission unit, and S608 corresponds to an example of processing as a transition processing unit.

[4. Other Embodiments]
Although the embodiments have been described above, it goes without saying that the portable device and the position detection system are not limited to the above-described embodiments and can take various forms.

In each said embodiment, when the control parts 25 and 52 acquire the signal strength of the radio | wireless communication between the vehicle-mounted apparatuses 15, the vehicle-mounted apparatus 15 measures a signal strength and uses the measured signal strength for the portable apparatuses 2 and 5. However, the signal strength may be measured directly by the portable devices 2 and 5. For example, the communication unit 22 may measure the signal strength, and the control units 25 and 52 may acquire the signal strength from the communication unit 22.

In each said embodiment, although the vehicle information alerting | reporting process which the portable apparatuses 2 and 5 perform was started by starting a dedicated application in the portable apparatuses 2 and 5, the said application is operating in the background. Also good. Further, the application may be activated without the user 3 performing an activation operation for activating the application. For example, it may be started by starting the operating system of the mobile devices 2 and 5.

Moreover, in each said embodiment, when estimating the distance between the portable apparatuses 2 and 5 and the vehicle 1 based on the acceleration of the portable apparatuses 2 and 5, the number of steps of the user 3 was used. The distance may be estimated using an amount based on the amount other than the number of steps.

Moreover, in each said embodiment, although the predetermined operation | movement used as the opportunity of the user 3 getting off was an operation | movement which opens and closes the door of the vehicle 1 when the user 3 gets off the vehicle 1, the said predetermined operation | movement is However, the present invention is not limited to this. For example, the predetermined operation may be an operation in which the user 3 stands on the driver's seat when getting off the vehicle. In that case, the driver's seat may be provided with a seating sensor, and the motion of standing up the driver's seat may be detected by the seating sensor.

In the determination logic (FIG. 7) of the second embodiment, the instantaneous value of the angle change (the latest measured angle change) is used, but the integrated value of the angle change may be used. As the integrated value of the angle change, for example, an integrated value after the user 3 gets off the vehicle 1 can be considered.

The modification of the determination logic (FIG. 7) according to the second embodiment is, for example, determination logic having a requirement that the threshold value Th1 of the number of steps changes according to an angle change or the number of steps counted according to the angle change. It may be a determination logic having a requirement that is reduced or reset.

Moreover, in the said 3rd Embodiment, although the determination (S515) of whether there is forgetting to lock a door among notification factors was performed by the portable apparatus 2 side, the said determination is performed by the vehicle 1 side. Also good. That is, when the control unit 152 performs the above determination and determines that the door lock is forgotten, the door lock actuator 108 may be locked. In this case, when there is a notification factor other than forgetting to lock the door, the control unit 152 wirelessly transmits information to the effect that there is a notification factor to the portable device 2 via the communication unit 151.

In the third embodiment, the notification factor that can be automatically removed on the vehicle 1 side is forgotten to lock the door, but the notification factor is not limited to this. For example, instead of forgetting to lock the door or in addition to forgetting to lock the door, forgetting to close the window may be automatically removed.

In the second embodiment, when there is a notification factor that can be automatically removed on the vehicle 1 side in the notification factor, the vehicle 1 may be caused to remove the notification factor. That is, in 2nd Embodiment, the information transmission process of FIG. 3 which the control part 152 of the vehicle-mounted apparatus 15 performs is changed into the information transmission process of FIG. 9, and the vehicle information alerting | reporting process of FIG. May be changed to the vehicle information notification process of FIG. In this case, the determination logic (S505) of the vehicle information notification process is the determination logic of FIG.

Moreover, in each said embodiment, the portable apparatuses 2 and 5 cancel | release alerting | reporting, when all the alerting factors are removed, ie, change the alerting | reporting form, and the vehicle 1 will be in the state without alerting | reporting factor. The user 3 was notified that it became. However, the portable devices 2 and 5 indicate to the user 3 that the vehicle 1 is in a state where there is no notification factor, for example, by displaying on the display unit 24 as an image such as a character that the notification factor has been eliminated. You may notify.

The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment as long as a subject can be solved. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment.

The flowchart described in this application or the process of the flowchart is composed of a plurality of steps (or referred to as sections), and each step is expressed as S101, for example. Further, each step can be divided into a plurality of sub-steps, while a plurality of steps can be combined into one step.

As described above, the embodiments, configurations, and aspects of the portable device and the position detection system have been illustrated, but the embodiments, configurations, and aspects are not limited to the above-described embodiments, configurations, and aspects. For example, embodiments, configurations, and aspects obtained by appropriately combining technical units disclosed in different embodiments, configurations, and aspects are also included in the scope of the embodiments, configurations, and aspects related to the portable device and the position detection system. .

Claims (15)

1. A portable device (2, 5) for performing wireless communication with an in-vehicle device (15) mounted on a vehicle (1),
   An acquisition unit (S203, S503) for acquiring signal strength of wireless communication between the portable device and the in-vehicle device;
   A first measurement unit (21) for measuring the acceleration of the portable device;
   Based on the signal intensity acquired by the acquisition unit and the acceleration measured by the first measurement unit, whether or not the portable device exists in the determination area (4) around the vehicle. A first determination unit (S205, S505) for determination;
   With
   The first determination unit estimates a distance between the portable device and the vehicle based on the acceleration, the distance is equal to or greater than a first threshold value, and the signal strength is a second value. A portable device that determines that the portable device does not exist in the determination area when the threshold is equal to or less than a threshold value.
2. The portable device according to claim 1,
   The in-vehicle device transmits operation information indicating whether or not the user (3) of the portable device has performed a predetermined operation that triggers getting off,
   The first determination unit measures an integrated value of a movement amount of a user of the portable device based on the acceleration, and uses the predetermined operation based on the operation information from the in-vehicle device. A portable device that resets the integrated value when it is determined that the person has performed, and estimates the distance between the portable device and the vehicle based on the integrated value from the last reset.
3. A portable device according to claim 1 or claim 2,
   The in-vehicle device transmits opening / closing information representing an opening / closing state of a door provided in the vehicle,
   The first determination unit measures an integrated value of a movement amount of a user of the portable device based on the acceleration, and determines that the door has been opened / closed based on the opening / closing information from the in-vehicle device. Is a portable device that resets the integrated value and estimates the distance between the portable device and the vehicle based on the integrated value from the last reset.
4. A portable device according to any one of claims 1 to 3,
   A second measuring unit (51, 52) for measuring a change in angle of the portable device;
   In the first determination unit, even if the distance is greater than or equal to a first threshold and the signal strength is less than or equal to a second threshold, the portable device A portable device that determines to be in the determination area.
5. The portable device according to claim 4,
   In the first determination unit, the distance is greater than or equal to a first threshold, the signal intensity is less than or equal to a second threshold, and the angle change is less than or equal to a third threshold. A portable device that determines that the portable device does not exist within the determination area.
6. A portable device according to any one of claims 1 to 5,
   When the first determination unit determines that the portable device does not exist in the determination area, the vehicle state is determined based on the state information indicating the vehicle state transmitted from the in-vehicle device. A second determination unit (S206, S506) for determining whether or not a predetermined state to be realized when there is no
   A first notification unit (S208, S508) for notifying the user of the portable device when the second determination unit determines that the state of the vehicle is not the predetermined state;
   A portable device further comprising:
7. The portable device according to claim 6,
   Whether the state of the vehicle is the predetermined state based on the state information transmitted from the in-vehicle device after the second determination unit determines that the state of the vehicle is not the predetermined state. A third determination unit (S206, S506) for determination;
   A second notification unit (S212, S512) for notifying the user of the portable device when the third determination unit determines that the state of the vehicle is the predetermined state;
   A portable device further comprising:
8. A portable device according to claim 6 or claim 7,
   When the second determination unit determines that the state of the vehicle is not the predetermined state, the user of the portable device automatically transitions to the predetermined state on the vehicle side without returning to the vehicle. A fourth determination unit (S515) for determining whether it is possible;
   When the fourth determination unit determines that the vehicle can automatically shift to the predetermined state, it transmits transition command information for instructing the vehicle to shift to the predetermined state. A transition command transmission unit (S516);
   A portable device further comprising:
9. A position detection system comprising an in-vehicle device (15) mounted on a vehicle (1) and a portable device (2, 5) that performs wireless communication with the in-vehicle device,
   The portable device is:
   An acquisition unit (S203, S503) for acquiring signal strength of wireless communication with the in-vehicle device;
   A first measurement unit (21) for measuring the acceleration of the portable device;
   Based on the signal intensity acquired by the acquisition unit and the acceleration measured by the first measurement unit, whether or not the portable device exists in the determination area (4) around the vehicle. A first determination unit (S205, S505) for determination;
   With
   The first determination unit estimates a distance between the portable device and the vehicle based on the acceleration, the distance is equal to or greater than a first threshold value, and the signal strength is a second value. The position detection system which determines with the said portable apparatus not existing in the said determination area when it is below a threshold value.
10. The position detection system according to claim 9,
    The in-vehicle device further includes an operation information transmission unit (S103, S603) that transmits operation information indicating whether or not the user (3) of the portable device has performed a predetermined operation that triggers getting off,
    The first determination unit measures an integrated value of a movement amount of a user of the portable device based on the acceleration, and uses the predetermined operation based on the operation information from the in-vehicle device. A position detection system that resets the integrated value when it is determined that the person has performed, and estimates the distance between the portable device and the vehicle based on the integrated value from the last reset.
11. The position detection system according to claim 9 or 10,
    The in-vehicle device further includes an opening / closing information transmitting unit (S103, S603) that transmits opening / closing information indicating an opening / closing state of a door provided in the vehicle,
    The first determination unit measures an integrated value of a movement amount of a user of the portable device based on the acceleration, and determines that the door has been opened / closed based on the opening / closing information from the in-vehicle device. Is a position detection system that resets the integrated value and estimates the distance between the portable device and the vehicle based on the integrated value from the last reset.
12. The position detection system according to any one of claims 9 to 11,
    The in-vehicle device is
    A third measuring unit (151) for measuring signal strength of wireless communication with the portable device;
    A signal strength transmitter (S103, S603) for transmitting the signal strength measured by the third measuring unit;
    Further comprising
    The said acquisition part is a position detection system which acquires the said signal strength transmitted by the said signal strength transmission part as signal strength of the radio | wireless communication between the said vehicle-mounted apparatuses.
13. A position detection system according to any one of claims 9 to 12,
    The in-vehicle device further includes a state information transmission unit (S103, S603) that transmits state information indicating the state of the vehicle,
    The portable device is:
    When the first determination unit determines that the portable device does not exist in the determination area, the vehicle state is realized based on the state information from the in-vehicle device when no occupant is present. A second determination unit (S206, S506) for determining whether or not the predetermined state should be satisfied;
    A first notification unit (S208, S508) for notifying the user of the portable device when the second determination unit determines that the state of the vehicle is not the predetermined state;
    A position detection system further comprising:
14. The position detection system according to claim 13,
    The portable device is:
    Whether the state of the vehicle is the predetermined state based on the state information transmitted from the in-vehicle device after the second determination unit determines that the state of the vehicle is not the predetermined state. A third determination unit (S206, S506) for determination;
    A second notification unit (S212, S512) for notifying the user of the portable device when the third determination unit determines that the state of the vehicle is the predetermined state;
    A position detection system further comprising:
15. The position detection system according to claim 13 or 14,
    The portable device is:
    When the second determination unit determines that the state of the vehicle is not the predetermined state, the user of the portable device automatically transitions to the predetermined state on the vehicle side without returning to the vehicle. A fourth determination unit (S515) for determining whether it is possible;
    When the fourth determination unit determines that the vehicle can automatically shift to the predetermined state, it transmits transition command information for instructing the vehicle to shift to the predetermined state. A transition command transmission unit (S516);
    Further comprising
    The in-vehicle device is
    A transition processing unit (S608) that performs processing for transitioning the state of the vehicle to the predetermined state based on the transition command information from the portable device;
    A position detection system further comprising:
    
    

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