JP2017122360A - Vehicle control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle control system capable of opening a trunk door and a back door in a non-contact detection manner while enhancing the security.SOLUTION: An ECU 20 performs a radio communication with a portable unit 3 to acquire a piece of collation information and a piece of position information to identify the collation authentication and the present position of the portable unit 3. When the collation authentication of the portable unit 3 completes successfully, and when the present position of the portable unit 3 continuously stays at an identical position, a back door 10 of a vehicle 100 starts the open operation upon a detection by a non-contact sensor 24.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle control system.

  In recent years, there is a vehicle equipped with a non-contact detection type (electrostatic type, optical type, etc.) instead of the conventional detection type by switch input when the trunk door or back door of the vehicle is opened (Patent Document 1). ). Thereby, the convenience improvement when opening a trunk door is aimed at.

JP 2007-162459 A

  However, by using such a non-contact detection type sensor (hereinafter referred to as a non-contact sensor), the trunk door and the back door are opened without the intention of the user, so there remains anxiety in terms of security.

  An object of the present invention is to increase security in a vehicle control system in which a trunk door or a back door is opened by non-contact detection.

A vehicle control system for solving the above problems is as follows.
Including an in-vehicle device mounted on a vehicle and a portable device that stores verification information unique to itself,
The in-vehicle device is
Collation information obtaining means for obtaining the collation information of the portable device by wireless communication with the portable device;
Collating means for collating the acquired collation information and determining whether the portable device corresponds to the vehicle;
Position information acquisition means for acquiring position information of the portable device at a predetermined acquisition cycle by wireless communication with the portable device;
Based on the acquired position information, position specifying means for specifying the current position of the portable device;
A collation condition in which the portable device is collated and authenticated by the collating unit, and a current position condition in which the position of the portable device specified by the position specifying unit is continuously the same around the back door of the vehicle. Control means for opening the back door of the vehicle when both conditions are satisfied;
It is characterized by providing.

  Here, the back door is an opening / closing portion at the rear of the vehicle, and includes not only a general back door on the vehicle rear side but also a trunk door.

  According to the above configuration, the trunk door does not open unless two conditions of the collation condition and the current position condition of the user are satisfied. In particular, the current position condition is not satisfied unless the user intentionally acts, so the trunk door does not open without the user's intention. Further, the control means is configured to open the trunk door (that is, the back door) of the vehicle when both the verification condition and the current position condition are satisfied and detection is made by a non-contact sensor provided in the vehicle. Even in this case, the trunk door is not opened only by the detection of the non-contact sensor, and the trunk door can be opened only after the user's intentional action.

The block diagram which showed simply the structure of the control system for vehicles. The figure explaining position specification of a portable machine. The flowchart which shows the flow of the automatic opening process of a back door. The flowchart explaining the communication processing of a portable device. The figure which shows the structural example of the communication data with a vehicle-mounted apparatus and a portable device. The data table which shows the position of the portable machine with respect to RSSI. The flowchart which shows the flow of collation and a position specific process. The figure explaining a vehicle proximity | contact area. The flowchart which shows the flow of the process which sets the detection period of a non-contact sensor. The figure explaining the position specification of the portable device by a method different from FIG. The figure which shows the structural example of the communication data of the vehicle-mounted apparatus and portable device in the case of FIG. The data table which shows the position of the portable apparatus with respect to RSSI in the case of FIG. The graph which showed the relationship between the value of RSSI and distance.

  As shown in FIG. 1, the vehicle control system 1 is a so-called smart entry system including an in-vehicle device 2 mounted on a vehicle 100 (see FIG. 2) and a portable device 3 possessed by a user.

  The in-vehicle device 2 includes an ECU 20 and vehicle interior transmission units 23a, 23b, 23c, a vehicle interior transmission unit 23r, a reception unit 25, a non-contact sensor 24, a door switch 27, and a buzzer 28 connected to the ECU 20.

  The ECU 20 includes a well-known CPU 21, a memory 22 configured by a nonvolatile storage medium that stores various information such as an in-vehicle device control program and a verification master code, and an I / O 26 that is a signal input / output circuit. Various functions of the in-vehicle device 2 are realized by the CPU 21 executing the in-vehicle device control program.

  The vehicle interior transmission units 23a, 23b, and 23c include antennas, and are installed in the center pillar of the vehicle 100 such as 23a and 23b, or in the trunk such as 23c (generic name for 23c1 and 23c2, hereinafter the same). (See FIG. 2). The vehicle interior transmitter 23r is attached to the vehicle interior (see FIG. 2) such as the center console, for example. These transmitters 23 (generic names of 23a, 23b, 23c, and 23r, the same applies hereinafter) use a LF (long wave) band radio wave (for example, 125 KHz) outside the vehicle interior or in the vehicle interior to be described later in the verification information request signal and position information. Send a request signal. Thereby, these transmission parts 23 can form the communicable area | region which can receive the signal to transmit in the vehicle periphery.

  The communicable area of each transmitter 23 is an area where the portable device 3 can receive each transmission signal, and is formed as an area extending from the antenna of each transmitter 23. More specifically, the communicable area of each transmission unit is in the range of about 70 cm to 1 m from each antenna.

  The receiving unit 25 includes an antenna and is attached to, for example, a vehicle interior, and receives a response signal transmitted from the portable device 3 using an RF (high frequency) band radio wave (for example, 315 MHz) from the vehicle interior or the vehicle interior. To do. By using radio waves in the RF band, even if the signal strength of the response signal is relatively weak, a corresponding communication distance (for example, 30 to 100 m) can be obtained, and the response signal can be received more reliably.

  The door switch 27 is a switch that is provided on the trunk back door 10 of the vehicle 100 and switches all the doors of the vehicle 100 between a locked state and an unlocked state. The trunk back door 10 is a back door that forms an opening / closing part at the rear of the vehicle 100. The door switch 27 is not shown in FIG. The door switch 27 is mounted on a handle portion that opens and closes the trunk back door 10, for example, and a touch sensor that detects that the user has touched a predetermined area of the handle portion or a push switch that detects that the user has pressed the door switch 27. Etc. An operation on the door switch 27 is an unlocking operation for unlocking all the doors of the vehicle 100 or a locking operation for locking.

  The non-contact sensor 24 is provided in the vehicle 100 and detects an object located around the trunk back door 10 in a non-contact manner. The non-contact sensor 24 of the present embodiment is an optical sensor that detects reflected light of light emitted from an emblem 11 (see FIG. 2) provided at the rear of the vehicle. The non-contact sensor 24 is not limited to the above-described optical sensor, and may be a sensor of another detection method such as a capacitance type sensor or a clearance sonar.

  The buzzer 28 is a well-known sound output unit provided in the vehicle 100 and is a vehicle outside notification unit that outputs a notification outside the vehicle. As for this outside notification unit, another notification unit (for example, a light emitting unit at the rear of the vehicle such as a brake lamp) may be used instead of the buzzer 28 or in combination with the buzzer. The buzzer 28 of the present embodiment is arranged so as to output a notification mainly toward the rear side of the vehicle.

  The in-vehicle device 2 is connected to the body ECU 50 via a communication line 6 such as a LAN.

  The body ECU 50 includes a well-known CPU 51, a memory 52 configured by a nonvolatile storage medium that stores various information such as an in-vehicle device control program and a verification master code, and an I / O 56 that is a signal input / output circuit. The body ECU 50 is connected to the door opening / closing drive unit 53 and the door locking mechanism 54. The door opening / closing drive unit 53 is an actuator that performs an opening drive that automatically opens the unlocked back door 10 and a closing drive that automatically closes the opened back door 10. The lock mechanism 54 is a well-known mechanism for locking and unlocking the back door 10. When the CPU 51 executes a predetermined control program, various functions such as opening and closing operations of the door opening / closing drive unit 53 and locking and unlocking of the door by the lock mechanism 54 are realized.

  The portable device 3 includes a control unit 31, a memory 32, a reception unit 33, a measurement unit 34, a transmission unit 35, and an operation unit 36 connected to the control unit 31. The control unit 31 is configured as a computer including a well-known CPU or the like (not shown). The CPU implements various functions of the portable device 3 by executing the portable device control program stored in the memory 32. The memory 32 is composed of a nonvolatile storage medium such as a flash memory, for example, and stores data necessary for the operation of the portable device 3 such as a portable device control program and an ID code for identifying the portable device 3.

  The receiving unit 33 includes an antenna, and receives a verification information request signal and a position information request signal from the transmission unit 23 of the in-vehicle device 2. When receiving the position information request signal for measuring RSSI, the measurement unit 34 measures the RSSI of the position information request signal based on, for example, a voltage induced in the antenna of the reception unit 33.

  The transmission unit 35 includes an antenna. When the reception unit 33 receives the verification information request signal, the transmission unit 35 transmits a response signal including an ID code and an RSSI measurement value (details will be described later) by using radio waves in the RF band.

  The operation unit 36 includes a switch used for executing a known remote keyless entry function. When the user operates the operation unit 36 within a predetermined communicable area formed outside the vehicle compartment of the vehicle 100, for example, the lock mechanism 54 can be unlocked / locked.

  By the way, the ECU 20 can unlock the door manually by a predetermined operation on the door switch 27 by satisfying the verification condition that the portable device 3 is verified. This is the same as the known smart entry system. On the other hand, the ECU 20 has both a verification condition that the portable device 3 is verified and a current position condition that the position of the portable device 3 is continuously the same around the back door 10 of the vehicle 100. When the above condition is satisfied and the detection by the non-contact sensor 24 is made, an opening operation for automatically opening the back door 10 from the closed state to the fully opened state is executed.

  Hereinafter, the process of automatically opening the back door 10 executed by the vehicle control system 1 will be described with reference to FIG.

  The ECU 20 starts the process of FIG. 3 when a predetermined timing comes. First, the collation information of the portable device 3 is acquired by wireless communication with the portable device 3 by wireless communication shown in FIG. 4, the acquired collation information is collated, and whether or not the portable device 3 corresponds to the vehicle 100. In addition, the position information of the portable device 3 is acquired at a predetermined acquisition cycle by the wireless communication with the portable device 3 and the current position of the portable device 3 is specified based on the acquired position information. The position specifying process is executed (S1).

  More specifically, as shown in FIG. 5, the ECU 20 causes each of the transmission units 23 including the transmission units 23c1 and 23c2 to transmit a collation information request signal Q1, and the transmission units 23c1 and 23c2 receive the position information request signal Sc1. , Sc2 is transmitted (S21). Thereby, ECU20 functions as a collation information requesting means and a position information requesting means. In the present embodiment, as shown in FIG. 5, after transmitting the collation information request signal Q1 from all the transmitters 23 at the same time, the position information request signal Sc1 is transmitted from the transmitters 23c1 and 23c2, for example, by shifting the transmission timing by 10 msec. , Sc2 in order.

  On the other hand, the portable device 3 executes the communication process shown in FIG. By this communication processing, the portable device 3 existing in each communicable area of each transmission unit 23 receives the request signal Q1 or the request signals Q1, Sc1, and Sc2 at the reception unit 33, respectively. The response signal A1 including the information requested by the signal is transmitted.

  The response signal A1 from the portable device 3 includes the verification information requested by the verification information request signal Q1. The collation information is an ID code unique to the portable device 3 stored in the memory 32. When the portable device 3 also receives the position information request signals Sc1 and Sc2 together with the collation information request signal Q1, the response signal A1 includes the position information requested by the position information request signals Sc1 and Sc2 together with the collation information. It is. The location information is a RSSI (Received Signal Strength Indicator) value measured by the measurement unit 34 when receiving the location information request signal from the transmission units 23c1 and 23c2. That is, the position information request signal is a measurement signal for causing the measurement unit 34 to measure RSSI.

  The transmitters 23c1 and 23c2 are arranged in the vehicle left-right direction, and the areas 23R1 and 23R2 in FIG. 2 are the communicable areas. The communicable areas 23R1 and 23R2 have some of the areas 23R as overlapping areas. In the overlapping area 23R, the RSSIs for the position information request signals transmitted from both of the transmitters 23c1 and 23c2 are provided. Can be obtained. If both of these RSSIs can be acquired, the position of the portable device 3 existing on the vehicle rear side of the transmitters 23c1 and 23c2 can be detected. That is, the position detection here is performed on the premise that there is no portable device 3 because the vehicle body exists on the front side of the vehicle. Therefore, the region on the vehicle rear side of the transmitters 23c1 and 23c2 in the overlapping region 23R is a position-identifiable region in which the position of the portable device 3 can be specified based on RSSI. An area excluding the vehicle 100 in the area 23R is a position identifiable area.

  On the other hand, as shown in FIG. 6, the memory 22 has a data table in which the RSSI of the position information request signal transmitted from the transmission units 23 c 1 and 23 c 2 received by the portable device 3 is associated with the position information of the portable device 3. Is remembered. The ECU 20 identifies the current position of the portable device 3 with reference to this data table. In FIG. 6, the position of the portable device 3 is determined only when two of the RSSIs of the position information request signals transmitted from the transmitters 23 can be acquired.

  Here, communication processing of the portable device 3 will be described with reference to FIG.

  The portable device 3 receives the verification information request signal Q1 at the receiving unit 33 (S31). By executing this, the receiving unit 33 functions as a collation information request receiving means. When the verification information request signal Q1 is received (S31: YES), the control unit 31 returns from the power saving mode (for example, the sleep mode) to the normal mode (S32). When the verification information request signal Q1 is received (S31: YES), if the control unit 31 is in the normal mode, the normal mode continues as it is (S32).

  Then, the portable device 3 receives the position information request signals Sc1 and Sc2 following the verification information request signal Q1 in the receiving unit 33 (S33). Thereby, the reception unit 33 functions as a request reception unit for position information. When the position information request signals Sc1 and Sc2 are received (S33: YES), the measurement unit 34 measures the RSSI of the position information request signals Sc1 and Sc2 (S34). Thereby, the measurement part 34 functions as a present position measurement means. And the control part 31 reads the collation information requested | required by the collation information request signal Q1 from the memory 32, and transmits the response signal A1 containing the read collation information and RSSI of each position information request signal Sc1, Sc2 to a transmission part. 35 (S35). Accordingly, the control unit 31 functions as a collation information transmission unit and a position information transmission unit.

  The response signal A1 includes the RSSIs of the position information request signals Sc1 and Sc2, in a form that makes clear the transmission unit 23 that is the source of the position information request signals Sc1 and Sc2. For example, the response signal A1 of the present embodiment is data in which the respective RSSIs are stored in the order in which the position information request signals Sc1 and Sc2 are received. The position information request signals Sc1 and Sc2 may include data that can determine which transmission unit 23 has transmitted the data, and the data may be included in the response signal A1.

  After transmitting the response signal A1, the control unit 31 of the portable device 3 shifts itself to the power saving mode (S36), and ends this process. If the position information request signals Sc1 and Sc2 are not received within a predetermined time after receiving the verification information request signal Q1 (S33: NO), a response signal A1 including only verification information is transmitted (S35). Then, the process shifts to the power saving mode (S36), and this process ends. The portable device 3 repeatedly executes this process at a predetermined cycle.

  Returning to FIG. The response signal A1 from the portable device 3 is received by the receiving unit 25. Thereby, the receiving unit 25 functions as a collation information receiving unit and a position information receiving unit. And these collation information receiving means and position information receiving means are collation information acquisition means for acquiring the collation information of the portable device 3 by wireless communication with the portable device 3 together with the above-mentioned collation information requesting means and position information requesting means. And it functions as position information acquisition means for acquiring position information of the portable device 3 by wireless communication with the portable device 3.

  When the response signal A1 is received (S22: YES), the ECU 20 executes a verification process for verifying the ID code, which is the verification information of the portable device 3 included in the response signal A1, and the master code stored in the memory 22 itself. Then, it is determined whether or not the portable device 3 is the portable device 3 corresponding to the vehicle 100 (S23). Thereby, ECU20 functions as a collation means. At this time, the ECU 20 acquires each measured value of RSSI included in the received response signal, and specifies the current position of the portable device 3 with reference to the data table of FIG. 5 based on the acquired RSSI ( S23). Thereby, ECU20 functions as a position specification means.

  Returning to FIG. When the verification is not performed in the verification process (S23), that is, when the verification is not normally performed (S2: NO), the ECU 20 ends the process without opening the back door 10. Also, when the response signal A1 is not received within the predetermined time (S2: NO), the ECU 20 ends this process.

  On the other hand, when the verification is performed, that is, when the verification is normally performed (S2: YES), the ECU 20 determines that the verification condition is satisfied. Then, the ECU 20 is within a predetermined vehicle proximity area 230R (see FIG. 8) in which the current position of the portable device 3 specified based on the acquired latest RSSI value is within a predetermined distance from the vehicle 100. It is determined whether or not (S3).

  Here, the vehicle proximity area 230R is an area where the portable device 3 possessed by the user can be present when the user is positioned in close contact with the outer periphery of the vehicle. Here, it is determined whether one of the two acquired RSSI values is larger than a predetermined first reference high level value. 3 is determined to be in the vehicle proximity area 230R. In addition, it is determined whether or not the sum of the two acquired RSSI values is larger than a predetermined second reference high level value. 3 is determined to be in the vehicle proximity area 230R.

  Moreover, about the vehicle proximity area 230R, a process can be simplified by setting it as an area which can be determined only by comparison with a reference value as described above. However, for example, the vehicle proximity area 230R is defined as an area within a predetermined distance from the vehicle 100 (for example, an area within 10 cm from the outer edge of the rear bumper of the vehicle 100), and is specified based on two RSSI values to be acquired. It may be determined whether the position is inside or outside the area.

  If it is determined that the current position of the portable device 3 is not within the vehicle proximity area 230R (S3: YES), the ECU 20 determines whether the value of RSSI_1 is stored in the memory 22 (S4). Thereby, ECU20 functions as a collation condition determination means. In RSSI_1, the latest position information of the portable device 3 is stored. If the value of RSSI_1 is not stored in the memory 22 (S4: NO), the ECU 20 stores the RSSI value acquired in S1 this time in RSSI_1 as the latest RSSI value (S11), and opens the back door 10. This process is finished without. On the other hand, if the value of RSSI_1 is stored in the memory 22 (S4: YES), the ECU 20 stores the value of RSSI_1 in RSSI_2 and uses the RSSI value acquired in S1 this time as the latest RSSI_1. (S5). Thereby, the position information of the portable device 3 measured immediately before is stored in RSSI_2.

  Then, ECU20 determines whether the value of RSSI_1 and the value of RSSI_2 are the same, and specifies whether the portable device 3 existed continuously in the same position (S6). Thereby, ECU20 functions as a present position condition judging means.

  Note that the RSSI_1 value and the RSSI_2 value do not need to be completely coincident, and if they are within a predetermined error range, it is determined that the RSSI_1 value and the RSSI_2 value are the same. And That is, the fact that the portable device 3 is continuously present at the same position means that the portable device 3 is continuously present within a predetermined range that is recognized as an error, and is continuously present at the completely same position. There is no need to be.

  When it is determined that the value of RSSI_1 is not the same as the value of RSSI_2 (S6: NO), the ECU 20 ends this process without opening the back door 10. On the other hand, when it is determined that the value of RSSI_1 and the value of RSSI_2 are the same (S6: YES), both the collation condition and the current position condition are satisfied. Along with this, the ECU 20 causes the buzzer 28 to execute outside notification (S7). As a result, the ECU 20 functions as a notification unit that notifies that both the matching condition and the current position condition are satisfied. The user can notice by this notification that the back door 10 can be automatically opened by the detection of the non-contact sensor 24.

  If both the verification condition and the current position condition are satisfied (S6: YES), the ECU 20 detects that the non-contact sensor 24 detects within a predetermined door opening permission time (for example, 10 sec) (S8: YES). Then, the back door 10 is opened (S9). That is, the ECU 20 of the present embodiment opens the back door 10 electrically by using the detection by the non-contact sensor 24 as a trigger in a state where both the verification condition and the current position condition are satisfied. More specifically, regarding the opening operation of the back door 10, the ECU 20 is closed by unlocking the locked back door 10 by the lock mechanism 54 and driving the door opening / closing drive unit 53. This is executed by outputting to the body ECU 50 a control command for automatically opening the back door 10 in a state to open it. Then, the value of RSSI_1 and the value of RSSI_2 are cleared (S10), and this process ends.

  On the other hand, if there is no detection by the non-contact sensor 24 within the door opening permission time (S8: NO → S12: YES), the opening operation of the back door 10 is prohibited (S13). Here, the unlocking and opening operation of the back door 10 triggered by the detection of the non-contact sensor 24 in a state where both the verification condition and the current position condition are satisfied is prohibited. Then, the value of RSSI_1 and the value of RSSI_2 are cleared, and this process ends. However, since the premise that the verification condition is satisfied does not change, it is possible to unlock the door and open the back door 10 manually by a predetermined operation on the door switch 27. Here, it is assumed that the prohibition (S13) of the opening operation of the back door 10 is canceled by manually opening the back door 10 in this way.

  As for the current position condition, not only the condition that the current position is continuously detected by the position detection by wireless communication as described above, but also the vehicle proximity where the current position of the portable device 3 is predetermined as an adjacent area of the vehicle 100 There is also a condition that it is in the area 230R (see FIG. 8). When it is determined that the current position of the portable device 3 is within the vehicle proximity area 230R (R3: No), the ECU 20 determines that the current position condition is satisfied. As a result, both the collation condition and the current position condition are satisfied. Accordingly, the ECU 20 causes the buzzer 28 to perform outside notification (S7: notification means) and then opens the back door 10 (S9). Then, the value of RSSI_1 and the value of RSSI_2 are cleared (S10), and this process ends.

  Note that the process of FIG. 3 is repeatedly executed at a predetermined cycle. In this repetition, two consecutive position detections are executed every 0.2 seconds at the shortest, for example.

  Thus, according to the present embodiment, the collation condition for collating and authenticating the portable device 3 and the current position condition in which the position of the portable device 3 is continuously the same around the back door 10 of the vehicle 100. When the two conditions are satisfied, the back door of the vehicle can be opened. Furthermore, in the case of the present embodiment, when the portable device 3 is continuously detected twice at the same position and the verification is performed at any of the two position detections, the detection by the non-contact sensor 24 is performed. The back door 10 can be automatically opened as a trigger (see the upper left figure in FIG. 2 and the lower left figure in FIG. 2). That is, in order to automatically open the back door 10, the portable device 3 must be detected at least twice continuously at the same position in the detection area by the non-contact sensor 24. It is necessary to take a stationary state within. This stationary state must be intentionally continued until detection by the non-contact sensor 24 is executed. When the user moves to shift the position of the portable device 3 (see the lower right diagram in FIG. 2), the back door 10 cannot be opened. Thus, according to the present embodiment, the back door 10 does not open without the user's intention. In other words, in a situation where the portable device 3 is moving, it is determined that the user does not intend to open the back door 10, and the back door 10 can be kept closed.

  By the way, the detection period of the non-contact sensor 24 in the present embodiment is set by the ECU 20. In the present embodiment, when the ECU 20 executes the cycle setting process shown in FIG. 9, the closer the current position of the portable device 3 specified by the position information acquired in the above process is to the vehicle 100, the closer the non-contact sensor 24 is. The detection cycle is set short.

  Specifically, first, the ECU 20 acquires the latest RSSI_1 value stored in the memory 22, and specifies the current position of the portable device 3 based on them (S41). As shown in FIG. 2, the first area 23RA, the second area 23RB, the third area 23RC, and the fourth area 23RD are set in the position identifiable area 23R in order from the side closer to the vehicle 100. It is specified in which of the areas 23RA to 23RD the current position of the portable device 3 is made (S42 to S49). When the portable device 3 is in the first area 23RA (S42: YES), the ECU 20 sets the detection cycle of the non-contact sensor 24 to a predetermined first cycle T1 (for example, 0.2 sec) that is the shortest cycle. (S43). When the portable device 3 is in the second area 23RB (S44: YES), the ECU 20 sets the detection cycle of the non-contact sensor 24 to a second cycle T2 (for example, 0.5 sec) longer than the first cycle T1. (S45). When the portable device 3 is in the third area 23RC (S46: YES), the ECU 20 sets the detection cycle of the non-contact sensor 24 to a third cycle T3 (for example, 1 sec) longer than the second cycle T2 (S47). ). When the portable device 3 is in the fourth area 23RD (S48: YES), the ECU 20 sets the detection cycle of the non-contact sensor 24 to a fourth cycle T4 (for example, 2 sec) longer than the third cycle T3 (S49). ). When the portable device 3 is in an area not included in any of these areas 23RA to 23RD, that is, outside the position identifiable area 23R, the position could not be specified even if the position was specified in S41. In the case, the detection stop is set (S50). As described above, the ECU 20 functions as a detection cycle setting unit that sets the detection cycle of the non-contact sensor 24 to be shorter as the current position of the specified portable device 3 is closer to the vehicle 100.

  The above embodiments are merely examples. The present invention is not limited to this, and various modifications such as additions and omissions can be made based on the knowledge of those skilled in the art without departing from the scope of the claims.

  Hereinafter, other examples and modifications will be described. However, the same portions as those in the above embodiment are denoted by the same reference numerals, and the description thereof is omitted. It should be noted that the above embodiment and the following embodiment or the following modification can be appropriately combined in an area where no technical contradiction occurs.

  In the above embodiment, the position of the portable device 3 is specified only in the area behind the back door 10 by the two transmission units 23c1 and 23c2, but as shown in FIG. 10, the transmission units 23a and 23b , 23c, and 23r each transmit a VLF (very long wave) radio wave (for example, 22 KHz) to the outside of the vehicle interior or the interior of the vehicle interior, the current position of the portable device 3 can be specified in the peripheral region surrounding the vehicle 100. It becomes possible. Here, there are four transmitters 23a, 23b, 23c, and 23r, but three or more transmitters are sufficient.

  Each of these transmitters 23a, 23b, 23c, and 23r can form the communicable areas 23Ra, 23Rb, 23Rc, and 23Rr within about 3 m centering on the respective antennas and within a maximum of 6 m. If three of these communicable areas 23Ra, 23Rb, 23Rc, and 23Rr overlap, the position of the portable device 3 can be obtained by the principle of triangulation. That is, a region where at least three of these communicable regions 23Ra, 23Rb, 23Rc, and 23Rr overlap is a position-identifiable region 23R that can identify the position of the portable device 3. As shown in FIG. 12, the memory 22 stores a data table in which the portable device 3 receives the RSSI of the position information request signal transmitted from each of the transmitters 23 and the position information of the portable device 3. Keep it. The ECU 20 specifies the current position of the portable device 3 with reference to this data table based on the RSSI corresponding to the at least three transmission units 23 acquired from the portable device 3 by wireless communication. The transmission timings of the collation information request signal and the position information request signal transmitted from each transmission unit 23 are transmitted from any transmission unit 23a, 23b, 23c, 23r by transmitting in a shifted manner as shown in FIG. It is possible to specify whether the request signal is a new one.

  At this time, the values of RSSI_1 and RSSI_2 stored in the memory 22 are only values on the detection area side (vehicle rear side) of the non-contact sensor 24, and values in other areas are not stored in the memory 22. It should be.

  In the above embodiment, the condition that the current position of the portable device 3 is in the vehicle proximity area 230R (see FIG. 8) is also included in one of the current position conditions. In this case, a method of determining the vehicle proximity area 230R by setting a reference value (reference high level value) for each RSSI value corresponding to the transmission units 23c1 and 23c2 is exemplified. This reference value may be determined from the relationship between the RSSI value and the distance. Specifically, as shown in FIG. 13, the relationship between the RSSI value and the distance takes substantially the same value up to a predetermined distance d0 (about 3 cm), and the value decreases as the distance increases. There is a tendency to go. Therefore, the reference value (reference high level value) may be determined as the RSSI value at the predetermined distance d0.

  In the above embodiment, the period for executing the collation process, that is, the period for executing the process of FIG. 3 is determined so that the collation process is performed at the same period as the known smart entry system. When the current position is continuously the same position, the ECU 20 determines one or both of an acquisition cycle for acquiring collation information and an acquisition cycle for acquiring position information (RSSI value). May be changed to a longer cycle. Thereby, ECU20 functions as an acquisition period setting means. For example, as shown in FIG. 10, when the current position of the portable device 3 is specified in the entire peripheral region of the vehicle 100, the situation in which the portable device 3 continues to move without moving from a certain position is that For example, it is considered that there is little intention to open the back door 10 of the vehicle 100. In such a case, power consumption due to useless wireless communication can be suppressed by setting the transmission cycle of the verification information request signal and the position information request signal to be longer than a predetermined normal cycle.

  Moreover, in the said Example, when the detection by the non-contact sensor 24 was made in the state by which the collation conditions and the present position conditions were satisfy | filled, it was the structure which can open the back door 10 by making the detection into a trigger. However, when the detection by the non-contact sensor 24 is made, the ECU 20 starts the acquisition of the collation information (collation information acquisition means) and the repeated acquisition of the position information at a predetermined cycle (position information acquisition means). When it is determined that both the matching condition and the current position condition are satisfied based on the matching result for the matching information and the position of the portable device 3 based on the repeatedly acquired position information, The back door 10 of the vehicle 100 may be opened. Thereby, useless communication can be omitted.

  Furthermore, in this case, when both the collation condition and the current position condition are not satisfied after detection by the non-contact sensor 24, it can be configured to notify that fact (notification means). Thereby, when the user tries to open the back door 10 by performing detection by the non-contact sensor 24 but does not open, the user can quickly recognize that the matching condition and the current position condition are not satisfied. be able to.

DESCRIPTION OF SYMBOLS 1 Vehicle control system 10 Back door 100 Vehicle 2 In-vehicle apparatus 3 Portable machine 20 ECU
24 Non-contact sensor 28 Buzzer 53 Door open / close drive unit 54 Lock mechanism

Claims (9)

Including an in-vehicle device mounted on a vehicle and a portable device that stores verification information unique to itself,
The in-vehicle device is
Collation information obtaining means for obtaining the collation information of the portable device by wireless communication with the portable device;
Collating means for collating the acquired collation information and determining whether the portable device corresponds to the vehicle;
Position information acquisition means for acquiring position information of the portable device at a predetermined acquisition cycle by wireless communication with the portable device;
Based on the acquired position information, position specifying means for specifying the current position of the portable device;
A collation condition in which the portable device is collated and authenticated by the collating unit, and a current position condition in which the position of the portable device specified by the position specifying unit is continuously the same around the back door of the vehicle. Control means for opening the back door of the vehicle when both conditions are satisfied;
A vehicle control system comprising: A non-contact sensor provided in the vehicle for detecting an object located around the back door in a non-contact manner;
2. The vehicle control according to claim 1, wherein the control means opens the back door of the vehicle when both the matching condition and the current position condition are satisfied and detection by the non-contact sensor is performed. system.   The vehicle control device according to claim 2, wherein the control means opens the back door by using a detection by the non-contact sensor in a state where both the collation condition and the current position condition are satisfied. Control system.   The control means opens the back door when there is a detection by the non-contact sensor within a predetermined door opening permission time after satisfying both the matching condition and the current position condition. 4. The vehicle control system according to claim 2, wherein when the non-contact sensor does not detect within the door opening permission time, the back door opening operation is prohibited. 5.   The detection cycle setting unit according to claim 2, further comprising a detection cycle setting unit configured to set a detection cycle of the non-contact sensor to be shorter as the current position specified by the position specifying unit is closer to the vehicle. Vehicle control system.   The vehicle control system according to any one of claims 1 to 5, further comprising notification means for notifying that when both the collation condition and the current position condition are satisfied.   When the current position specified by the position specifying unit is continuously the same position, an acquisition cycle in which the verification information acquisition unit acquires the verification information, and the position information acquisition unit acquires the position information. The vehicle control system according to any one of claims 1 to 6, further comprising an acquisition cycle setting unit that changes either or both of the acquisition cycles to be performed to a longer cycle than before. The collation information acquisition means acquires the collation information when detection by the non-contact sensor is performed,
The collation means collates the collation information,
The position information acquisition means starts acquiring the position information in a predetermined cycle when detection by the non-contact sensor is performed,
The position specifying means specifies the current position of the portable device based on the position information repeatedly acquired,
The control means determines that both the matching condition and the current position condition are satisfied based on the matching result by the matching means and the position of the portable device repeatedly specified by the position specifying means. The vehicle control system according to claim 2, wherein a back door of the vehicle is opened.   When the current position of the portable device specified by the position specifying means is within a vehicle proximity area defined as an adjacent area of the vehicle, the control means is configured such that the positions of the portable devices are continuously the same. The vehicle control system according to claim 1, wherein it is determined that the current position condition is satisfied regardless of whether the current position is satisfied.

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