JP2010216079A - Door lock control device and method and portable information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve security against illegal operation planned carefully. <P>SOLUTION: An antenna 91 is installed inside a region 81 being a regular LF communication area outside a vehicle to receive a request signal by an LF communication signal outside the vehicle transmitted from a door knob antenna 22 and supply the received request signal into an amplifier 92, which amplifies the request signal and transmits it through an antenna 93. Consequently, a region 82 as an illegal LF communication area outside the vehicle where the request signal by the LF communication signal outside the vehicle can be received is formed. When an answer signal corresponding to the request signal of the LF communication signal outside the vehicle is properly received, whether a door can be unlocked or not is controlled after determining whether an output value of the acceleration sensor exceeds the threshold value set in advance or not. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a door lock control device and method, and a portable information processing device, and more particularly to a door lock control device and method and a portable information processing capable of improving security against carefully planned illegal operations. Relates to the 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 PES, antennas connected to in-vehicle devices are arranged in door knobs, trunks, and interiors of vehicles, and each antenna transmits a signal of LF wave (for example, 100 to 200 KHz) to a portable device as necessary. In addition, a signal transmitted from the portable device is received and communication between the in-vehicle device and the portable device is performed. 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. For example, various security measures are taken with respect to the control of door unlocking and the like.

  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. That is, for example, when a user carrying a portable device presses a predetermined switch on the door knob side of the vehicle, the door is unlocked.

  On the other hand, when the portable device is outside the LF communication area outside the vehicle when an operation requesting unlocking of the door is performed, the door is not unlocked. Therefore, even if someone presses a predetermined switch on the vehicle, the door is not unlocked. Normally, a legitimate user is considered to be carrying a portable device, so if the portable device is outside the LF communication area outside the vehicle, it is not considered to be a switch operation by a legitimate user. It is designed not to be unlocked.

  In addition, if the user loses the portable device in a form that causes an impact such as dropping the portable device, the transmission of radio waves is prohibited if the magnitude of the impact detected by the impact sensor exceeds a predetermined value. A technique for preventing unauthorized use by a malicious third party when lost is also proposed (see Patent Document 1).

  Furthermore, a portable device is also proposed in which a portable device transmits an operation signal only when a grip detection signal is output, and an unintended remote operation can be suppressed when the portable device is carried in a pocket or bag. (For example, refer to Patent Document 2).

JP 2004-324227 A JP 2007-329815 A

  However, for example, a suspicious person who wants to steal an object in a vehicle interior may expand the outside LF communication area using a repeater device including a first antenna, an amplifier, and a second antenna. Concerned.

  For example, a suspicious person installs a first antenna inside an LF communication area outside a regular vehicle, receives a request signal transmitted from an antenna of a vehicle doorknob, and amplifies the received request signal with an amplifier. Transmit from the second antenna. As a result, an illegal area in which a request signal transmitted from the doorknob antenna can be received is generated.

  For example, if the second antenna is disposed in the vicinity of a legitimate user who carries the portable device, the vehicle-mounted device and the portable device can communicate with each other, and the vehicle door can be unlocked.

  Thus, in the conventional PES, for example, when the LF communication area outside the vehicle is expanded by using a repeater device, unlocking of the door cannot be prevented.

  The present invention has been made in view of such a situation, and is intended to improve security against illegal operations planned carefully.

  A door lock control device according to the present invention includes an operation determination unit that determines whether or not an input unit that commands unlocking of a door has been operated, and an antenna for vehicle exterior when the operation determination unit determines that the input unit has been operated. A request signal transmitting means for transmitting a request signal from an answer signal, an answer signal determining means for determining whether an answer signal transmitted from a portable device carried by a user in response to the transmitted request signal is received, and an answer When it is determined that the answer signal is received by the signal determination means, the acceleration acquisition means for acquiring information representing the acceleration value of the portable device included in the answer signal, and the portable device specified based on the acquired information The acceleration determination means for determining whether or not the acceleration value is equal to or less than a preset threshold value, and the acceleration determination means determine the acceleration value of the portable device. If it is determined that the set is equal to or less than the threshold, and a unlock permission control means for outputting a control signal for permitting unlocking of the door.

  In the door lock control device of the present invention, it is determined whether or not the input means for commanding the unlocking of the door has been operated, and when it is determined that the input means has been operated, a request signal is transmitted from the antenna for vehicle exterior, In response to the transmitted request signal, it is determined whether an answer signal transmitted from a portable device carried by the user is received, and if it is determined that the answer signal has been received, the portable device included in the answer signal Information representing the acceleration value of the mobile device is acquired, and it is determined whether or not the acceleration value of the mobile device specified based on the acquired information is equal to or less than a preset threshold value, and the acceleration value of the mobile device is When it is determined that the value is equal to or less than a preset threshold value, a control signal for permitting unlocking of the door is output.

  Therefore, it is possible to prevent the door from being unlocked by an unauthorized operation using the repeater device.

  The acceleration determination means further determines whether or not the acceleration value of the portable device specified based on the acquired information is greater than 0, and the unlock permission control means uses the acceleration determination means to When it is determined that the acceleration value is equal to or less than a preset threshold value and greater than 0, a control signal for permitting unlocking of the door can be output.

  The answer signal determination means may determine that the answer signal has been received when the authentication code included in the answer signal transmitted by the portable device matches the authentication code registered in advance.

  The door lock control method according to the present invention determines whether or not the input means for commanding unlocking of the door has been operated. When it is determined that the input means has been operated, the request signal is transmitted from the antenna for vehicle exterior and transmitted. In response to the received request signal, it is determined whether an answer signal transmitted from the portable device carried by the user is received. If it is determined that the answer signal has been received, the mobile device included in the answer signal Information indicating an acceleration value is acquired, and it is determined whether the acceleration value of the portable device specified based on the acquired information is equal to or less than a preset threshold value, and the acceleration value of the portable device is determined in advance. When it is determined that the value is equal to or less than the set threshold value, the method includes a step of outputting a control signal for permitting unlocking of the door.

  The portable information processing apparatus according to the present invention is a control signal that permits door unlocking in response to a request signal transmitted from a door lock control device that controls door locking based on an answer signal transmitted from a portable device. Is a portable information processing apparatus that transmits an answer signal to output a value of acceleration at a preset period, and a predetermined information. And an answer signal transmitting means for transmitting an answer signal including information indicating the authentication code and the acceleration value stored in the memory in response to the request signal. Prepare.

  In the portable information processing apparatus of the present invention, the acceleration value is detected and the acceleration value is output in a preset cycle, the predetermined authentication code and the acceleration value are stored, and the request signal is received. Thus, the answer signal including the authentication code stored in the memory and the information indicating the acceleration value is transmitted.

  ADVANTAGE OF THE INVENTION According to this invention, the security with respect to the illegal operation planned carefully can be improved.

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 in case door unlocking is performed in PES. It is a figure explaining the example in case door unlocking is not performed in PES. It is a figure explaining the example in case door unlocking is performed illegally using a repeater apparatus. It is a flowchart explaining the example of a door unlock 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 unlock 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 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 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 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, the door is locked only when the portable device 10 is in the LF communication area outside the vehicle when an operation for requesting locking of the door is performed by a switch or sensor (hereinafter referred to as a switch or the like) provided in the vehicle 1. When the machine 10 is in the in-vehicle LF communication area, it is not 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.

  For example, when the user goes out of the vehicle 1 from the room with the portable device 10, the microcomputer 101 acquires the authentication code 133 a included in the answer signal.

  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 out-of-vehicle LF communication signal, the microcomputer 101 responds to the control interface 102 with permission to lock the door. Output a control signal. 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.

  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. In the present invention, at this time, the acceleration of the portable device 10 is further checked.

  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 and the output value of the acceleration sensor 134 are 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, when the answer signal does not correspond to the request signal of the in-vehicle LF communication signal, that is, when the answer signal corresponds to the request signal of the out-of-vehicle LF communication signal, the output value of the acceleration sensor 134 is not more than a preset threshold value. It is determined whether or not.

  When the output value of the acceleration sensor 134 is equal to or less than a preset threshold value, the microcomputer 101 outputs a control signal corresponding to permission to unlock the door to the control interface 102. 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.

  For example, when the portable device 10 is located at the position shown in FIG. 4, the door is unlocked by pressing a predetermined switch. In FIG. 4, a region 81 indicated by a dotted-line ellipse in the drawing represents an out-of-vehicle LF communication area that is an area in which the main unit 20 can communicate with the portable device 10 by an out-of-vehicle LF communication signal. For simplicity of explanation, it is assumed here that only one door knob antenna 22 is attached to the right side of the vehicle 1 in the drawing.

  In the example of FIG. 4, since the portable device 10 is located in the area 81, the portable device 10 can receive a request signal based on an external LF communication signal. Therefore, for example, when the user carrying the portable device 10 presses a predetermined switch of the vehicle 1, the door is unlocked.

  On the other hand, for example, when the portable device 10 is located at the position shown in FIG. 5, the door is not unlocked even if a predetermined switch is pressed. 4, similarly to FIG. 4, a region 81 indicated by a dotted oval in the drawing represents an outside LF communication area, and only one door knob antenna 22 is attached to the right side of the vehicle 1 in the drawing. .

  In the example of FIG. 5, since the portable device 10 is located outside the area 81, the portable device 10 cannot receive the request signal based on the LF communication signal outside the vehicle. Therefore, even if someone presses a predetermined switch of the vehicle 1, the door is not unlocked. Normally, a legitimate user is considered to be carrying the portable device 10, so when the portable device 10 is in the position shown in FIG. 5, it is not considered to be a switch operation by a legitimate user. The door is not unlocked.

  However, for example, there is a concern that a suspicious person who intends to steal an object in the room of the vehicle 1 expands the LF communication area outside the vehicle using the reception antenna, the amplifier, and the transmission antenna. This is because even a suspicious person who does not have the portable device 10 can unlock the door of the vehicle 1.

  For example, as shown in FIG. 6, consider a case where a suspicious person expands the outside LF communication area using a repeater device including an antenna 91, an amplifier 92, and an antenna 93. The antenna 91 is installed inside an area 81 that is a normal outside LF communication area, receives a request signal by an outside LF communication signal transmitted from the doorknob antenna 22, and the received request signal is supplied to the amplifier 92. The amplifier 92 amplifies the request signal and transmits it from the antenna 93. Thereby, the area | region 82 which can receive the request signal by the LF communication signal outside a vehicle transmitted from the doorknob antenna 22 will be produced | generated.

  That is, the area 82 is an unauthorized outside LF communication area.

  For example, if the antenna 93 is disposed in the vicinity of a legitimate user carrying the portable device 10, the portable device 10 transmits an answer signal corresponding to the request signal received in the area 82. The answer signal is received by the antenna 93 and transmitted from the antenna 91 via the amplifier 92, whereby the door of the vehicle 1 can be unlocked.

  In the conventional PES, for example, when the outside LF communication area is expanded using a repeater device as shown in FIG. 6, door unlocking cannot be prevented. Therefore, in the present invention, as described above, when the answer signal corresponding to the request signal of the external LF communication signal is legitimately received, whether the output value of the acceleration sensor 134 is equal to or more than a preset threshold value. It is determined whether or not the door can be unlocked.

  In the region 82 of FIG. 6, the portable device 10 is considered to be carried by a legitimate user who is moving away from the vehicle 1. On the other hand, for example, when the portable device 10 is in the position shown in FIG. 4, it is considered that a legitimate user has stopped and operated the switch on the door knob side, and the portable device 10 should not move. is there. Therefore, even if the outside LF communication area is expanded using the repeater device, whether or not the operation is unlocked by a legitimate user by determining whether or not the output value of the acceleration sensor 134 is equal to or less than the threshold value. Therefore, it can be determined that the unlocking operation is performed by the suspicious person.

  Next, an example of door unlock control processing by the main unit 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 unlocking 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 S102, the microcomputer 101 sets the value of the variable n for specifying the number of retries to 0. Here, an example in which the number of retries is 3 will be described.

  In step S103, the microcomputer 101 determines whether or not the value of the variable n is less than 3. If it is determined that the value of the variable n is less than 3, the process proceeds to step S104. If it is determined in step S103 that the value of the variable n is 3 or more, the retry ends, so the process ends.

  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 increments the value of the variable n by 1.

  In step S106, 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. 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 S106 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 S103. As described above, the process ends after three retries. That is, when communication with the portable device 10 is not possible by an out-of-vehicle LF communication signal, it cannot be confirmed that the operation is performed by a valid user, and thus the door of the vehicle 1 is not unlocked.

  On the other hand, when it is determined in step S106 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 S107.

  In step S107, the microcomputer 101 checks the answer signal determined to have been normally received in step S106. Thereby, the output value of the acceleration sensor 134 included in the answer signal is checked.

  In step S108, the microcomputer 101 determines whether or not the output value of the acceleration sensor 134 obtained as a result of the check in step S107 is equal to or less than a preset threshold value.

  If it is determined in step S108 that the output value of the acceleration sensor 134 exceeds a preset threshold value, the process ends. As described above with reference to FIG. 6, when the output value of the acceleration sensor 134 exceeds the threshold value, the portable device 10 is considered to be carried by a legitimate user and moved. On the other hand, for example, when the portable device 10 is in the position shown in FIG. 4, it is considered that a legitimate user has stopped and operated the switch on the door knob side, and the portable device 10 should not move. is there. Therefore, when the output value of the acceleration sensor 134 exceeds the threshold value, the door of the vehicle 1 is not unlocked.

  On the other hand, if it is determined in step S108 that the output value of the acceleration sensor 134 is equal to or less than a preset threshold value, the process proceeds to step S109. In step S <b> 109, the microcomputer 101 outputs a control signal corresponding to permission to unlock the door to the control interface 102. Thereby, the door of the vehicle 1 is unlocked 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 less than the threshold value, it is considered that the portable device 10 is not moving. For example, an answer signal is transmitted from an unauthorized outside LF communication area generated using a repeater device. It is very unlikely. Furthermore, it is confirmed through the process of step S106 that the portable device 10 is located in the outside LF communication area. Therefore, when it is determined in step S109 that the output value of the acceleration sensor 134 is equal to or less than the threshold value, the door of the vehicle 1 is unlocked.

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

  This process is not executed when the portable device 10 is located in the in-vehicle LF communication area. As described above, when the answer signal corresponding to the request signal of the in-vehicle LF communication signal is received, the microcomputer 101 performs control so as not to unlock the door of the vehicle 1. For example, prior to the processing of FIG. 7, it is determined whether an answer signal corresponding to the request signal of the in-vehicle LF communication signal is received, and it is determined that no answer signal corresponding to the request signal of the in-vehicle LF communication signal has been received. Only when it is done, the processing of FIG. 7 is executed.

  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, if it is determined in step S121 that the request signal based on the external LF communication signal transmitted from the doorknob antenna 22 in step S104 of FIG. 7 has been normally received, the request signal based on the external LF communication signal is determined in step S122. An answer signal corresponding to is transmitted.

  Then, in the main unit 20, the process of step S106 in FIG. 7 is executed based on the answer signal transmitted in the process of step S122.

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

  By the way, in the example described above with reference to FIG. 6, it has been described that the portable device 10 is considered to be carried by a legitimate user in the area 82, but for example, the antenna 93 is legitimately used. When installed in a person's home or the like, there is a low possibility that the portable device 10 is carried and carried. Rather, in such a case, there is a high possibility that the portable device 10 is placed in a predetermined place and is stationary.

  Therefore, if it is determined that the output value of the acceleration sensor 134 is less than or equal to the threshold value, the door of the vehicle 1 is unlocked. If the antenna 93 is installed in the home of a legitimate user, the suspicious Unable to prevent the door from being unlocked by a person.

  In order to prevent the door from being unlocked by a suspicious person even when the antenna 93 is installed in a legitimate user's home or the like, if the output value of the acceleration sensor 134 is 0, the vehicle 1 The door should not be unlocked. Further, for example, when the portable device 10 is in the position shown in FIG. 4, it is considered that a legitimate user has stopped and operated the switch on the door knob side. 10 is not considered to be completely stationary.

  In other words, the door is unlocked only when the output value of the acceleration sensor 134 included in the answer signal from the portable device 10 is greater than 0 and equal to or less than the threshold value.

  With reference to the flowchart of FIG. 9, another example of door unlock control processing by the main unit 20 will be described. In this example, for example, even when the antenna 93 of FIG. 6 is installed in the home of a legitimate user, the door is prevented from being unlocked by a suspicious person.

  Since steps S151 to S157 in FIG. 9 are the same as steps S101 to S107 in FIG. 7, detailed description thereof is omitted.

  In step S158, the microcomputer 101 determines whether the output value of the acceleration sensor 134 obtained as a result of the check in step S156 is greater than 0 and less than or equal to a threshold value.

  If it is determined in step S158 that the output value of the acceleration sensor 134 is 0 or exceeds the threshold value, the process ends.

  On the other hand, if it is determined in step S158 that the output value of the acceleration sensor 134 is greater than 0 and less than or equal to the threshold value, the process proceeds to step S159. In step S <b> 159, the microcomputer 101 outputs a control signal corresponding to permission to unlock the door to the control interface 102. As a result, the door of the vehicle 1 is unlocked in response to the operation of the switch determined in the process of step S151.

  By doing so, for example, even when the antenna 93 of FIG. 6 is installed in the home of a legitimate user, it is possible to prevent the suspicious person from unlocking the door.

  In the above description, an example in which the present invention is applied to the control of unlocking the door of the vehicle 1 has been described.

  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 (5)

Operation determining means for determining whether or not the input means for commanding unlocking of the door has been operated;
A request signal transmitting means for transmitting a request signal from the vehicle antenna when the operation determining means determines that the input means has been operated;
An answer signal determination means for determining whether an answer signal transmitted from a portable device carried by a user in response to the transmitted request signal is received;
When it is determined by the answer signal determination means that the answer signal has been received, an acceleration acquisition means for acquiring information indicating the value of the acceleration of the portable device included in the answer signal;
Acceleration determining means for determining whether or not the value of the acceleration of the portable device specified based on the acquired information is equal to or less than a preset threshold value;
An unlock permission control means for outputting a control signal for permitting the unlocking of the door when the acceleration determining means determines that the acceleration value of the portable device is equal to or less than a preset threshold value. Lock control device. The acceleration determination means further includes
Determining whether the value of the acceleration of the portable device specified based on the acquired information is greater than 0;
The unlock permission control means includes
The control signal for permitting unlocking of the door is output when the acceleration determination means determines that the acceleration value of the portable device is less than or equal to a preset threshold value and greater than zero. The door lock control device described. The answer signal determination means includes
The door lock control device according to claim 1, wherein when the authentication code included in the answer signal transmitted by the portable device matches an authentication code registered in advance, it is determined that the answer signal has been received. It is determined whether or not the input means for commanding unlocking the door has been operated,
When it is determined that the input means has been operated, a request signal is transmitted from the vehicle antenna,
In response to the transmitted request signal, it is determined whether an answer signal transmitted from a portable device carried by the user is received,
If it is determined that the answer signal has been received, obtain information indicating the value of acceleration of the portable device included in the answer signal;
Determining whether the acceleration value of the portable device identified based on the acquired information is equal to or less than a preset threshold value;
A door lock control method including a step of outputting a control signal for permitting unlocking of the door when it is determined that an acceleration value of the portable device is equal to or less than a preset threshold value. In response to a request signal transmitted from a door lock control device that controls door locking based on an answer signal transmitted from a portable device, a control signal for permitting unlocking of the door is output to the door lock control device. A portable information processing device that transmits an answer signal,
Acceleration detecting means for detecting own acceleration and outputting the acceleration value at a preset period;
A memory for storing a predetermined authentication code and the acceleration value;
A portable information processing apparatus comprising: an answer signal transmitting unit configured to transmit an answer signal including information representing an authentication code stored in the memory and the value of the acceleration corresponding to the request signal.

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