JP2010189900A - Device and method for controlling door lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a passive entry system (PES) which is excellent in security, and restrains a portable machine from being locked in. <P>SOLUTION: An area 71 indicated by an ellipse shown by dotted lines in Fig. indicates an in-vehicle LF communication area in which the body machine can communicate with the portable machine by an in-vehicle LF communication signal. Additionally, areas 72-1 to 72-4 indicated by ellipses shown by dotted lines in Fig. indicate out-of-vehicle LF communication areas in which the body machine can communicate with the portable machine by an out-of-vehicle LF communication signal. When the portable machine is positioned at four kinds of indoor Null points, the portable machine is locked in when the door is locked because it is recognized that the portable machine is positioned in the out-of-vehicle LF communication area and outside the vehicle, though the portable machine is positioned in a vehicle interior. When an answer signal responding to a request signal of the out-of-vehicle LF communication signal is rightly received, the right or wrong of door locking is controlled by further determining whether or not the output value of an acceleration sensor is a preset threshold or above. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door lock control device and method, and more particularly, to a door lock control device and method capable of providing a PES that is excellent in security and suppresses the occurrence of confinement of a portable device.

  In recent years, for example, as a vehicle entry system, a so-called passive entry system (PES) that automatically locks and unlocks doors in a hands-free manner has been put into practical use, and further spread is expected in the future.

  PES, for example, performs two-way wireless communication between a portable device that can be carried by a user and an in-vehicle device, and the authenticity of the portable device based on electromagnetic waves (signals) received from the portable device by the in-vehicle device. The operation of the locking mechanism of the vehicle door (unlocking operation and locking operation) is automatically realized by the control of the in-vehicle device by performing confirmation, analysis of the position of the portable device, and the like.

  In the passive entry system, antennas connected to in-vehicle devices are arranged in vehicle door knobs, trunks, indoors, etc., and each antenna is LF wave (for example, 100 to 200 KHz) with respect to the portable device as necessary. In addition, the vehicle-mounted device and the portable device communicate with each other by receiving the signal transmitted from the portable device. The range in which communication is possible by LF waves transmitted from the antenna of this in-vehicle device is limited. For example, the LF communication area is set separately for the interior (inside the vehicle) and the outside (outside the vehicle) of the vehicle.

  In PES, for example, when a user operates a switch or the like provided on the outside of a vehicle door to unlock the door, communication between the in-vehicle device and the portable device is performed, and unlocking by a legitimate user is performed. Whether or not the operation is performed is determined. In this case, the door is unlocked only when the portable device is in the LF communication area outside the vehicle when an operation for requesting unlocking of the door is performed by a switch or the like on the vehicle side. This is to prevent the door from being unlocked by a suspicious person outside the vehicle even though there is a legitimate user inside the vehicle.

  If the door is locked only when the portable device is in the LF communication area outside the vehicle when the door is locked by a switch on the vehicle side, etc., and the portable device is in the LF communication area inside the vehicle. It is not locked. This is to prevent the portable device from being trapped.

  Further, a sub signal transmission circuit that transmits a sub ID signal for a certain period when transmission of the signal transmission circuit is stopped on the portable device side, and a sub ID signal storage unit that stores on / off of the sub ID signal transmission on the in-vehicle controller side, In addition to providing alarm means, the vehicle controller side inputs cylinder key status, door open / close status, and door lock status status data. If the driver forgets to put the key in the vehicle due to carelessness, etc., the ID on the portable device side When the signal transmission is stopped, the door is prevented from being automatically locked, and at this time, the sub-ID signal storage unit for storing the ON / OFF state of the sub-ID signal by the sub-signal transmission circuit, and the door opening / closing A technology has also been proposed in which the alarm means is driven based on the status data of the status so that the driver can be notified of key misplacement quickly. (E.g., see Patent Document 1).

JP 2003-106020 A

  However, in PES, it is difficult to set a sufficiently wide LF communication area in the vehicle. This is because if the LF wave transmitted from the antenna installed in the vehicle leaks outside the vehicle, there is a security problem.

  On the other hand, it is also difficult to prevent LF waves transmitted from an antenna installed outside the vehicle from leaking into the vehicle. This is because the antenna outside the vehicle is attached to the door knob of the vehicle.

  Therefore, the portable device may be located outside the LF communication area inside the vehicle and inside the LF communication area outside the vehicle even though the portable device is inside the vehicle. If the portable device is placed in such a position, the portable device is accidentally closed.

  The present invention has been made in view of such a situation, and is intended to provide a PES that is excellent in security and suppresses the occurrence of confinement of a portable device.

  The door lock control device according to the present invention is a door lock control device for controlling the lock of a vehicle door, and includes a vehicle exterior request signal transmitting means for transmitting a vehicle exterior request signal toward the outside of the vehicle, and a user corresponding to the transmitted vehicle exterior request signal. If the vehicle answer signal determining means for determining whether or not the vehicle answer signal transmitted from the portable device carried by the vehicle is received and the vehicle answer signal determining means determines that the vehicle answer signal is received, Acceleration acquisition means for acquiring information representing the acceleration value of the included portable device, and determining whether or not the acceleration value of the portable device specified based on the acquired information is greater than or equal to a preset threshold value If the acceleration determination means and the acceleration determination means determine that the acceleration value of the portable device is equal to or greater than a preset threshold value, And a locking authorization control means for outputting a control signal for permitting click.

  In the door lock control device of the present invention, an out-of-vehicle request signal is transmitted toward the outside of the vehicle, and whether or not an out-of-vehicle answer signal transmitted from a portable device carried by the user in response to the transmitted out-of-vehicle request signal is received. Is determined and information indicating the value of the acceleration of the mobile device included in the external response signal is acquired, and the acceleration of the mobile device specified based on the acquired information is acquired. It is determined whether or not the value of the mobile phone is greater than or equal to a preset threshold value. If the acceleration value of the portable device is determined to be greater than or equal to the preset threshold value, a control signal for permitting the door to be locked is output. The

  Therefore, misplacement of the portable device can be reliably prevented.

  In-vehicle request signal transmitting means for transmitting an in-vehicle request signal toward the inside of the vehicle, and in-vehicle answer signal determining means for determining whether an in-vehicle answer signal transmitted from the portable device in response to the transmitted in-vehicle request signal has been received The lock permission control means is not determined by the in-vehicle answer signal determination means to have received the in-vehicle answer signal, and the acceleration determination means determines that the acceleration value of the portable device is greater than or equal to a preset threshold value. If it is determined that there is, it is possible to output a control signal for permitting the door to be locked.

  Each of the outside answer signal determination means and the in-vehicle answer signal determination means determines that the answer signal has been received when the correspondence between the authentication code included in the answer signal transmitted by the portable device and the predetermined code is confirmed. Can be.

  The door lock control method according to the present invention transmits a request signal outside the vehicle toward the outside of the vehicle, and receives an answer signal outside the vehicle transmitted from a portable device carried by the user in response to the transmitted request signal outside the vehicle. If it is determined that an out-of-vehicle answer signal has been received, information indicating the value of the acceleration of the portable device included in the out-of-vehicle answer signal is acquired, and the acceleration of the specified mobile device is identified based on the acquired information. A step of determining whether or not the value is equal to or greater than a preset threshold and, when it is determined that the value of acceleration of the portable device is equal to or greater than a preset threshold, outputting a control signal for permitting the door to be locked including.

  In the door lock control method of the present invention, an out-of-vehicle request signal is transmitted toward the outside of the vehicle, and whether or not an out-of-vehicle answer signal transmitted from a portable device carried by the user in response to the transmitted out-of-vehicle request signal is received. Is determined and information indicating the value of the acceleration of the mobile device included in the external response signal is acquired, and the acceleration of the mobile device specified based on the acquired information is acquired. It is determined whether or not the value of the mobile phone is greater than or equal to a preset threshold value. If the acceleration value of the portable device is determined to be greater than or equal to the preset threshold value, a control signal for permitting the door to be locked is output. The

  ADVANTAGE OF THE INVENTION According to this invention, PES which is excellent in security and suppresses generation | occurrence | production of the closure of a portable machine can be provided.

It is a figure which shows the structural example of the passive entry system (PES) to which this invention is applied. It is a block diagram which shows the structural example of the control unit of FIG. It is a block diagram which shows the structural example of the portable device of FIG. It is a figure explaining the example of the system of determination when the door lock in PES is performed, and when the door is not locked. It is a figure explaining the example of the system of determination when the door lock in PES is performed, and when the door is not locked. It is a figure explaining the example of the system of determination when the door lock in PES is performed, and when the door is not locked. It is a flowchart explaining the example of a door lock control process. It is a flowchart explaining the example of the process of the portable device performed corresponding to FIG. It is a flowchart explaining another example of a door lock control process.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing a configuration example according to an embodiment of the passive entry system (PES) of the present invention. The figure shows an example in which the PES 50 of the present invention is applied to a smart entry system of a four-door type automobile 1 (vehicle 1). The PES 50 includes a portable device 10 and a main body device 20 mounted on the vehicle 1.

  The antenna of the main unit 20 includes a doorknob antenna 22 installed at the doorknob of each door, and a vehicle interior antenna 24 installed at the front (between the driver seat and front passenger seat) and rear (center of the rear seat) of the vehicle interior. And are provided. Here, for example, a method in which a low frequency in the LF band is used for communication from the main device 20 to the portable device 10 and a high frequency in the UHF band is used for communication from the portable device 10 to the main device 20 (LF−). UHF intercommunication system) is adopted.

  The portable device 10 includes a UHF communication unit (not shown) (including a built-in antenna and a transmission circuit) that transmits UHF waves (300 to 3000 MHz) as means for wireless communication to the main device 20, and the main device 20. As a means for wireless communication from the mobile phone, an LF communication unit (not shown) (including a built-in antenna and a receiving circuit) that receives LF waves (for example, 100 to 200 kHz) is included. In addition, the portable device 10 includes a control circuit including a microcomputer (hereinafter referred to as a microcomputer) that realizes control processing of the entire portable device, a built-in battery, and the like. A switch or the like (not shown) that is a button-type operation unit is provided.

  The LF wave sent from the vehicle interior antenna 24 and the LF wave sent from the doorknob antenna 22 have different predetermined data formats, for example. A signal transmitted by the LF wave transmitted from the vehicle interior antenna 24 is referred to as an in-vehicle LF communication signal. On the other hand, the signal transmitted by the LF wave transmitted from the doorknob antenna 22 is referred to as an out-of-vehicle LF communication signal.

  Although details will be described later, the area where the main unit 20 can communicate with the portable device 10 by the in-vehicle LF communication signal is limited to the case where the distance between the vehicle interior antenna 24 and the portable device 10 is within a predetermined range. This area is referred to as an in-vehicle LF communication area. Further, the area where the main unit 20 can communicate with the portable device 10 by the vehicle LF communication signal is limited to the case where the distance between the doorknob antenna 22 and the portable device 10 is within a predetermined range. This area is referred to as an out-of-vehicle LF communication area.

  When receiving the request signal transmitted from the main unit 20, the portable device 10 has a function of transmitting an answer signal including an authentication code described later. The request signal is a signal that requests the portable device 10 to send back a signal. The portable device 10 transmits an answer signal in response to the request signal of the in-vehicle LF communication signal transmitted from the main device 20. Further, the portable device 10 transmits an answer signal in response to the request signal of the external LF communication signal transmitted from the main device 20. In the main unit 20, the answer signal corresponding to the request signal of the in-vehicle LF communication signal and the answer signal corresponding to the request signal of the outside LF communication signal can be distinguished.

  For example, the time zone in which the answer signal corresponding to the request signal of the in-vehicle LF communication signal can be received and the time zone in which the answer signal corresponding to the request signal of the out-of-vehicle LF communication signal can be set in a certain cycle are set. Thus, the two can be distinguished from each other. Alternatively, for example, the encoding method of the answer signal corresponding to the request signal of the in-vehicle LF communication signal is different from the encoding method of the answer signal corresponding to the request signal of the outside LF communication signal, and both can be distinguished. It may be made to become. Alternatively, the two may be made distinguishable by the header information of the answer signal.

  As shown in FIG. 1, the main unit 20 includes a control unit 21, the door knob antenna 22, and the vehicle interior antenna 24 described above. Here, the doorknob antenna 22 and the vehicle interior antenna 24 are antennas that transmit and receive LF waves to and from the portable device 10, and their communicable areas are determined according to the output of electromagnetic waves transmitted from each antenna. The distance range is ˜2 m.

  FIG. 2 is a block diagram illustrating a detailed configuration example of the control unit 21. In the figure, a control interface 102 is connected to electronic control parts of an automobile and transmits / receives a predetermined signal or the like according to the control of the microcomputer 101. For example, the control interface 102 transmits a signal indicating whether the engine of the automobile is running or stopped to the bus 105, or transmits a signal indicating whether the door lock of the automobile is released. The control interface 102 outputs a control signal for controlling each part of the automobile as necessary.

  The communication control unit 104 controls execution of wireless communication performed through the door knob antenna 22 and the vehicle interior antenna 24 described above.

  The microcomputer 101 is configured as a small computer having a processor, a memory, and the like, and controls the control interface 102 and the communication control unit 104 via the bus 105 by software such as an installed program. For example, the microcomputer 101 performs a verification check to determine whether the authentication code included in the answer signal from the portable device 10 corresponds to the registered authentication code. The authentication code included in the answer signal is, for example, an ID number unique to the portable device 10 or a number unique to the vehicle.

  The user setting receiving unit 111 receives, for example, user setting contents based on signals from an operation unit (not shown) or the portable device 10 as necessary.

  FIG. 3 is a block diagram illustrating a configuration example of the portable device 10 of FIG. As shown in the figure, the portable device 10 is configured such that a control unit 131, a communication unit 132, a memory 133, and an acceleration sensor 134 are connected to each other via a bus 135.

  A control unit 131 in FIG. 8 controls processing of each unit of the portable device. The control unit 131 is a so-called microcomputer composed of a CPU, a ROM, and a RAM, and controls the overall operation of the portable device 10 by the CPU developing and executing a program stored in the ROM on the RAM. . In response to the request signal transmitted from the main unit 20, the control unit 131 controls the communication unit 132 to transmit the authentication code 133a stored in the memory 133 in advance. Further, the control unit 131 includes an acceleration value output from the acceleration sensor 134 read from the memory 133 in the signal transmitted from the communication unit 132.

  The values of acceleration output by the authentication code 133a and the acceleration sensor 134 are stored in, for example, a predetermined field in the answer signal, and the main body 20 that has received the answer signal receives the authentication code 133a and The acceleration value output from the acceleration sensor 134 can be acquired.

  The communication unit 132 controls the execution of wireless communication performed via the antenna of the portable device 10 (not shown).

  The memory 133 is configured, for example, as an EEPROM (Electrically Erasable Programmable Read-Only Memory) or the like, and stores necessary information in addition to the above-described authentication code 133a. For example, the memory 133 stores the acceleration value output from the acceleration sensor 134 for a predetermined time.

  The acceleration sensor 134 detects the acceleration in each direction of the portable device 10 and outputs the value. For example, when the user carries the portable device 10, the acceleration is detected by the acceleration sensor 134. Note that when the portable device 10 is stationary, the acceleration value output by the acceleration sensor 134 is zero. The acceleration sensor 134 outputs the detected acceleration value to the bus 135 and stores it in the memory 133 at a constant cycle, for example.

  Further, the portable device 10 can be configured integrally with a mobile phone or the like. When the portable device 10 is configured integrally with a mobile phone, the portable device 10 can be connected to the Internet or send and receive e-mails, for example.

  In the PES 50, for example, when a user operates a switch or the like provided on the outside of a vehicle door to unlock the door, communication between the main unit 20 and the portable device 10 is performed, and a valid user performs It is determined whether or not it is an unlocking operation. In this case, the door is unlocked only when the portable device 10 is in the outside LF communication area when an operation for requesting unlocking of the door is performed by a switch of the vehicle 1 or the like. This is to prevent the door from being unlocked by a suspicious person outside the vehicle even though there is a legitimate user inside the vehicle.

  For example, when the user approaches the vehicle 1 with the portable device 10, an answer signal transmitted from the communication unit 132 of the portable device 10 is received by the communication control unit 104 of the control unit 21 and received by the microcomputer 101. The authentication code 133a included in the received signal is acquired.

  The microcomputer 101 determines whether or not the authentication code corresponds to a pre-registered authentication code. If the microcomputer 101 corresponds to the registered authentication code, the received answer signal is a request for an in-vehicle LF communication signal. It is determined whether or not the answer signal corresponds to the signal.

  When the answer signal corresponds to the request signal of the in-vehicle LF communication signal, the microcomputer 101 performs control so as not to unlock the door of the vehicle 1. On the other hand, if the answer signal does not correspond to the request signal of the in-vehicle LF communication signal, that is, if the answer signal corresponds to the request signal of the out-of-vehicle LF communication signal, the control signal corresponding to permission to unlock the door to the control interface 102 Is output. Thus, the control interface 102 unlocks the door of the vehicle 1 by unlocking the door lock when the user presses a predetermined switch provided on the door knob side of the vehicle 1, for example. Will be.

  In addition, when the operation of requesting the door to be locked by the switch of the vehicle 1 is performed, the door is locked only when the portable device 10 is in the outside LF communication area, and the portable device 10 is in the in-vehicle LF communication area. It is designed not to be locked. This is because the door is locked while the portable device 10 is left in the vehicle, so as to prevent so-called closing. In the present invention, at this time, the acceleration of the portable device 10 is further checked.

  For example, when the user goes out of the vehicle 1 with the portable device 10, the microcomputer 101 acquires the authentication code 133 a included in the answer signal and the output value of the acceleration sensor 134.

  The microcomputer 101 determines whether or not the authentication code corresponds to the registered authentication code. If the microcomputer 101 corresponds to the registered authentication code, the received answer signal is a request signal of the in-vehicle LF communication signal. It is determined whether the answer signal corresponds to. When the answer signal corresponds to the request signal of the in-vehicle LF communication signal, the microcomputer 101 performs control so as not to lock the door of the vehicle 1. On the other hand, if the answer signal does not correspond to the request signal of the in-vehicle LF communication signal, that is, if the answer signal corresponds to the request signal of the in-vehicle LF communication signal, the microcomputer 101 further sets the output value of the acceleration sensor 134 in advance. It is determined whether or not it is equal to or greater than the threshold value.

  If the output value of the acceleration sensor 134 is equal to or greater than a preset threshold value, the microcomputer 101 outputs a control signal corresponding to permission to lock the door to the control interface 102. As a result, the control interface 102 locks the door of the vehicle 1 by locking the door lock of the vehicle, for example, when the user presses a predetermined switch provided on the door knob side of the vehicle 1. Will be.

  FIGS. 4 to 6 are diagrams illustrating an example of a determination method when the door is locked in the PES 50 and when the door is not locked. 4 to 6, an area 71 indicated by a dotted-line ellipse in the figure represents an in-vehicle LF communication area that is an area in which the main unit 20 can communicate with the portable device 10 by an in-vehicle LF communication signal. 4 to 6, areas 72-1 to 72-4 indicated by dotted-line ellipses in the drawings are areas outside the vehicle LF that are areas in which the main unit 20 can communicate with the portable device 10 by the vehicle outside LF communication signal. Represents a communication area.

  In the example of FIG. 4, the portable device 10 is located in an area 72-1 that is an out-of-vehicle LF communication area. In this case, the main unit 20 cannot communicate with the portable device 10 by the in-vehicle LF communication signal, but can communicate with the portable device 10 only by the in-vehicle LF communication signal.

  In the case of FIG. 4, since it can be confirmed that the portable device 10 is outside the vehicle, it is considered that the closure of the portable device 10 does not occur even when the door of the vehicle 1 is locked.

  In the example of FIG. 5, the portable device 10 is located in a region 71 that is an in-vehicle LF communication area. In this case, the main unit 20 cannot communicate with the portable device 10 by the external LF communication signal, but can communicate with the portable device 10 only by the in-vehicle LF communication signal.

  In the case of FIG. 5, since it can be confirmed that the portable device 10 is in the vehicle, it is considered that when the door of the vehicle 1 is locked, the portable device 10 is closed. Therefore, in this case, control is performed so that locking is not performed.

  Note that there is an area where the in-vehicle LF communication area and the out-of-vehicle LF communication area partially overlap with each other in the vicinity of the door inside the vehicle 1. Since the portable device 10 may exist in the vehicle, it is considered that the portable device 10 is closed when the door of the vehicle 1 is locked. Therefore, in this case, control is performed so that locking is not performed.

  FIG. 6 shows an example of a case where the portable device 10 is located inside the vehicle LF communication area even though the portable device 10 is located inside the vehicle 1.

  In PES, it is difficult to set a sufficiently wide in-vehicle LF communication area. This is because if the LF wave transmitted from the antenna installed in the vehicle leaks outside the vehicle, there is a security problem. On the other hand, it is also difficult to prevent LF waves transmitted from an antenna installed outside the vehicle from leaking into the vehicle. This is because the antenna outside the vehicle is attached to the door knob of the vehicle. Therefore, there is a region outside the in-vehicle LF communication area and inside the out-of-vehicle LF communication area, regardless of the interior of the vehicle 1. Such a region is referred to as an indoor null point.

  The example of FIG. 6 shows an example in which the portable device 10 is located at four indoor null points. For example, when the portable device 10 is placed at the position shown in the figure, communication with the portable device 10 cannot be performed by the in-vehicle LF communication signal, and communication with the portable device 10 can be performed only by the outside LF communication signal. Based on this alone, if the portable device 10 is recognized as being outside the vehicle and the door is locked, the portable device 10 is closed.

  Therefore, in the present invention, when an answer signal corresponding to the request signal of the LF communication signal outside the vehicle is legitimately received, it is further determined whether or not the output value of the acceleration sensor 134 is equal to or greater than a preset threshold value. The door is locked or not. When the portable device 10 exists at a position as shown in FIG. 6, it can be estimated that the portable device 10 has been misplaced, so the portable device 10 should not have moved for a certain period of time. Therefore, whether or not the portable device 10 is located at the indoor null point can be determined by determining whether or not the output value of the acceleration sensor 134 is equal to or greater than a threshold value.

  Next, an example of door lock control processing by the main body 20 will be described with reference to the flowchart of FIG.

  In step S101, the microcomputer 101 determines whether or not a predetermined switch provided on the door knob side of the vehicle 1 is operated based on a control signal output from the control interface 102, and the switch is operated. Wait until it is judged. The user operates this switch when locking the door of the vehicle 1.

  If it is determined in step S101 that the switch has been operated, the process proceeds to step S102.

  In step S <b> 102, the microcomputer 101 controls the communication control unit 104 to transmit a request signal based on the in-vehicle LF communication signal from the vehicle interior antenna 24. When this request signal is received by the portable device 10, the portable device 10 transmits an answer signal corresponding to the request signal based on the in-vehicle LF communication signal.

  In the present embodiment, the request signal is described as being transmitted based on a switch operation provided in the vicinity of the doorknob, but is not necessarily limited thereto. For example, it may be transmitted periodically under the control of the microcomputer 101, or may be transmitted based on the detection of a person or hand by a sensor provided in the door handle part.

  In step S103, the microcomputer 101 determines whether or not the answer signal corresponding to the request signal by the in-vehicle LF communication signal transmitted in step S102 has been normally received.

  At this time, for example, it is determined whether or not the signal is normally received based on a check digit of an answer signal. At this time, it is also determined whether or not the authentication code corresponds to a pre-registered authentication code. If the authentication code does not correspond to the registered authentication code, it is not determined that the authentication code is normally received. That is, when there is no error in the format of the answer signal and a valid authentication code is confirmed, the microcomputer 101 determines that the answer signal has been normally received.

  If it is determined in step S103 that the answer signal corresponding to the request signal based on the in-vehicle LF communication signal has been normally received, the process returns to step S101. That is, when communication with the portable device 10 is possible by the in-vehicle LF communication signal, it can be confirmed that the portable device 10 is in the vehicle, and thus the door of the vehicle 1 is not locked.

  On the other hand, if it is determined in step S103 that the answer signal corresponding to the request signal based on the in-vehicle LF communication signal has not been received normally, the process proceeds to step S104.

  In step S <b> 104, the microcomputer 101 controls the communication control unit 104 to transmit a request signal based on the vehicle exterior LF communication signal from the doorknob antenna 22. When this request signal is received by the portable device 10, the portable device 10 transmits an answer signal corresponding to the request signal based on the external LF communication signal.

  In step S105, the microcomputer 101 determines whether or not the answer signal corresponding to the request signal based on the external LF communication signal transmitted in step S104 has been normally received. At this time, for example, it is determined whether or not the signal is normally received based on a check digit of an answer signal. At this time, it is also determined whether or not the authentication code corresponds to a pre-registered authentication code. If the authentication code does not correspond to the registered authentication code, it is not determined that the authentication code is normally received.

  If it is determined in step S105 that the answer signal corresponding to the request signal based on the external LF communication signal has not been received normally, the process returns to step S101. That is, when communication with the portable device 10 is not possible due to the LF communication signal outside the vehicle, since it cannot be confirmed that the operation is performed by a valid user, the door of the vehicle 1 is not locked.

  On the other hand, when it is determined in step S105 that the answer signal corresponding to the request signal based on the in-vehicle LF communication signal has been normally received, the process proceeds to step S106.

  In step S106, the microcomputer 101 checks the answer signal determined to have been normally received in step S105. Thereby, the output value of the acceleration sensor 134 included in the answer signal is checked.

  In step S107, the microcomputer 101 determines whether or not the output value of the acceleration sensor 134 obtained as a result of the check in step S106 is greater than or equal to a preset threshold value.

  If it is determined in step S107 that the output value of the acceleration sensor 134 is less than a preset threshold value, the process returns to step S101. As described above with reference to FIG. 6, when the output value of the acceleration sensor 134 is less than the threshold value, the portable device 10 is considered to be located at the indoor null point. When the portable device 10 is located at the indoor null point, the portable device 10 is closed when the door of the vehicle 1 is locked. Therefore, when the output value of the acceleration sensor 134 is less than the threshold value, the door of the vehicle 1 is not locked.

  On the other hand, if it is determined in step S107 that the output value of the acceleration sensor 134 is greater than or equal to a preset threshold value, the process proceeds to step S108. In step S <b> 108, the microcomputer 101 outputs a control signal corresponding to permission to lock the door to the control interface 102. Thereby, the door of the vehicle 1 is locked in response to the operation of the switch determined in the process of step S101.

  That is, when the output value of the acceleration sensor 134 is equal to or greater than the threshold value, it is considered that the portable device 10 has been moved to just before, and therefore the possibility that the portable device 10 is located at the indoor null point is extremely low. Furthermore, it has been confirmed through the processing in step S103 and the processing in step S105 that the portable device is located outside the in-vehicle LF communication area and within the out-of-vehicle LF communication area. Therefore, when it is determined in step S108 that the output value of the acceleration sensor 134 is equal to or greater than the threshold value, the door of the vehicle 1 is locked.

  In this way, the door lock of the vehicle 1 is controlled.

  Next, with reference to the flowchart of FIG. 8, the process of the portable device 10 executed corresponding to the door lock control process of FIG. 7 will be described.

  In step S121, the control unit 131 determines whether or not the request signal has been normally received from the main body 20, and waits until it is determined that the request signal has been normally received from the main body 20.

  If it is determined in step S121 that the request signal has been normally received from the main unit 20, the process proceeds to step S122.

  In step S122, the control unit 131 controls the communication unit 132 to transmit an answer signal corresponding to the request signal. Note that the answer signal transmitted at this time includes the authentication code 133a read from the memory 133 and the output value of the acceleration sensor 134 as described above.

  For example, in step S121, when it is determined that the request signal based on the in-vehicle LF communication signal transmitted from the vehicle interior antenna 24 in step S102 of FIG. 7 has been normally received, in step S122, the request signal based on the in-vehicle LF communication signal. An answer signal corresponding to is transmitted.

  Further, for example, when it is determined in step S121 that the request signal by the outside LF communication signal transmitted from the doorknob antenna 22 in step S104 in FIG. 7 is normally received, in step S122, by the outside LF communication signal. An answer signal corresponding to the request signal is transmitted.

  Then, in the main unit 20, the processes in steps S103 and S105 in FIG. 7 are executed based on the answer signal transmitted in the process in step S122.

  In this way, the processing of the portable device is executed.

  With reference to the flowchart of FIG. 9, another example of door lock control processing by the main unit 20 will be described. In this example, when communication using the in-vehicle LF communication signal cannot be performed, the door is not allowed to be locked regardless of whether communication using the in-vehicle LF communication signal is possible.

  In step S151, the microcomputer 101 determines whether or not a predetermined switch provided on the door knob side of the vehicle 1 is operated based on a control signal output from the control interface 102, and the switch is operated. Wait until it is judged. The user operates this switch when locking the door of the vehicle 1.

  If it is determined in step S151 that the switch has been operated, the process proceeds to step S152.

  In step S <b> 152, the microcomputer 101 controls the communication control unit 104 to transmit a request signal based on an external LF communication signal from the doorknob antenna 22. When this request signal is received by the portable device 10, the portable device 10 transmits an answer signal corresponding to the request signal based on the external LF communication signal.

  In step S153, the microcomputer 101 determines whether or not the answer signal corresponding to the request signal based on the external LF communication signal transmitted in step S152 has been normally received. At this time, for example, it is determined whether or not the signal is normally received based on a check digit of an answer signal. At this time, it is also determined whether or not the authentication code corresponds to a pre-registered authentication code. If the authentication code does not correspond to the registered authentication code, it is not determined that the authentication code is normally received.

  In step S153, when it is determined that the answer signal corresponding to the request signal based on the external LF communication signal is not normally received, the process returns to step S101. That is, if communication with the portable device 10 is not possible due to the LF communication signal outside the vehicle, the portable device 10 is not considered to be in a predetermined position outside the vehicle, and it cannot be confirmed that the operation is performed by a valid user. The door of the vehicle 1 is not locked.

  On the other hand, if it is determined in step S153 that the answer signal corresponding to the request signal based on the in-vehicle LF communication signal has been normally received, the process proceeds to step S154.

  In step S154, the microcomputer 101 checks the answer signal determined to have been normally received in step S153. Thereby, the output value of the acceleration sensor 134 included in the answer signal is checked.

  In step S155, the microcomputer 101 determines whether or not the output value of the acceleration sensor 134 obtained as a result of the check in step S154 is greater than or equal to a preset threshold value.

  If it is determined in step S155 that the output value of the acceleration sensor 134 is less than the preset threshold value, the process returns to step S151. As described above with reference to FIG. 6, when the output value of the acceleration sensor 134 is less than the threshold value, the portable device 10 is considered to be located at the indoor null point. When the portable device 10 is located at the indoor null point, the portable device 10 is closed when the door of the vehicle 1 is locked. Therefore, when the output value of the acceleration sensor 134 is less than the threshold value, the door of the vehicle 1 is not locked.

  On the other hand, if it is determined in step S155 that the output value of the acceleration sensor 134 is greater than or equal to a preset threshold value, the process proceeds to step S156. In step S156, the microcomputer 101 outputs a control signal corresponding to permission to lock the door to the control interface 102. As a result, the door of the vehicle 1 is locked in response to the operation of the switch determined in step S151.

  That is, when the output value of the acceleration sensor 134 is equal to or greater than the threshold value, it is considered that the portable device 10 has been moved to just before, and therefore the possibility that the portable device 10 is located at the indoor null point is extremely low. Furthermore, it is confirmed that the portable device is located in the outside LF communication area through the process of step S153. Accordingly, when it is determined in step S156 that the output value of the acceleration sensor 134 is equal to or greater than the threshold value, the door of the vehicle 1 is locked.

  In this way, the door lock of the vehicle 1 is controlled. By doing in this way, the process of the main body machine 20 can be simplified more compared with the case of FIG.

  The steps of executing the series of processes described above in this specification are performed in parallel or individually even if they are not necessarily processed in time series, as well as processes performed in time series in the order described. It also includes processing.

1 vehicle,
10 mobile device,
20 Main unit,
21 control unit,
22 door knob antenna,
24 Car interior antenna,
101 microcomputer,
102 control interface,
104 communication control unit,
111 User setting reception unit,
131 control unit,
132 communication unit,
133 memory,
134 Acceleration sensor

Claims (4)

In a door lock control device that locks and controls a vehicle door,
An external request signal transmitting means for transmitting an external request signal toward the outside of the vehicle;
A vehicle outside answer signal determining means for determining whether or not a vehicle outside answer signal transmitted from a portable device carried by the user in response to the transmitted vehicle outside request signal is received;
When it is determined that the vehicle answer signal is received by the vehicle answer signal determination unit, an acceleration acquisition unit that acquires information representing the acceleration value of the portable device included in the vehicle answer signal;
Acceleration determining means for determining whether or not the acceleration value of the portable device specified based on the acquired information is equal to or greater than a preset threshold value;
A lock permission control means for outputting a control signal for permitting the door to be locked when the acceleration determination means determines that the acceleration value of the portable device is greater than or equal to a preset threshold value. apparatus. In-vehicle request signal transmitting means for transmitting an in-vehicle request signal toward the inside of the vehicle,
In-vehicle answer signal determination means for determining whether or not an in-vehicle answer signal transmitted from the portable device in response to the transmitted in-vehicle request signal is received,
The lock permission control means does not determine that the in-vehicle answer signal has been received by the in-vehicle answer signal determination means, and the acceleration determination means determines that the acceleration value of the portable device is greater than or equal to a preset threshold value. The door lock control device according to claim 1, wherein a control signal for permitting the lock of the door is output when it is determined. Each of the vehicle exterior answer signal determination means and the vehicle interior answer signal determination means includes:
The door lock control device according to claim 1, wherein when the correspondence between an authentication code included in the answer signal transmitted by the portable device and a predetermined code is confirmed, the answer signal is determined to be received. In a door lock control method of a door lock control device that locks and controls a vehicle door,
Send a request signal outside the vehicle,
In response to the transmitted outside request signal, it is determined whether or not the outside answer signal transmitted from the portable device carried by the user is received,
When it is determined that the vehicle exterior answer signal has been received, information representing the value of the acceleration of the portable device included in the vehicle exterior answer signal is acquired,
Determining whether the value of acceleration of the portable device specified based on the acquired information is greater than or equal to a preset threshold value;
A door lock control method including a step of outputting a control signal for permitting the door to be locked when it is determined that the acceleration value of the portable device is equal to or greater than a preset threshold value.

Images