JP5091560B2 - Anti-theft device - Google Patents

Description

  The present invention relates to a keyless entry system that controls locking and unlocking of a vehicle door by a portable device, and more particularly to a system that controls a door without operating a switch provided on the portable device.

  Conventionally, there is a system for remotely controlling a lock mechanism of a vehicle door by remotely operating a portable device from a location where the vehicle owner is away from the vehicle to lock (lock) and unlock (unlock) the vehicle door. To do. Among these, in recent years, a remote control system called Smart Entry (registered trademark) that unlocks a door only by approaching a vehicle without operating a portable device has been put into practical use.

  Here, with the smart entry system, the vehicle-mounted device provided in the vehicle periodically transmits a search signal to a predetermined detection area, and the portable device receives the search signal transmitted from the vehicle side. In other words, when the owner of the vehicle carrying the portable device enters the detection area, a response signal corresponding to the search signal is returned from the portable device to the vehicle side. The door is unlocked when it is determined whether the response signal is correct.

  In such a smart entry system, it is not unlocked only by receiving a response signal, but is unlocked when an operation to an operation detection unit such as a touch sensor or a switch provided in a door knob or the like, that is, a contact action to a vehicle is detected. There exists a system (see, for example, Patent Document 1).

  As another system for such a smart entry system, the in-vehicle device outputs a search signal to the portable device triggered by detecting the contact action to the vehicle, and the portable device returns a response signal to the output signal. However, there is a system that unlocks when the vehicle-mounted device receives a response signal (see, for example, Patent Document 2). Both of these systems can reliably reflect the user's intention to unlock.

On the other hand, there is a device for preventing theft of a vehicle. Here, the anti-theft device refers to an alarm for the surroundings of a vehicle when it is determined by a sensor that detects theft of the vehicle in a theft monitoring state that the vehicle is in a stolen state or that the vehicle may be stolen. This is a system that outputs an alarm or outputs an alarm such as notifying the owner or a monitoring center that a theft has occurred. As the theft detection sensor, a sensor that detects theft from an external force or an impact applied to the vehicle, such as a glass break sensor that detects a sound when the glass is broken or a vibration sensor that detects a vibration of the vehicle, is used. . Further, when the door is unlocked by the portable device, the anti-theft device is released from the anti-theft monitoring state and becomes a non-monitoring state.
JP 2001-040921 A Japanese Patent No. 2973310

  When the anti-theft device is mounted on a vehicle equipped with the smart entry system as described above, the following problems occur.

  That is, when a user who has a portable device tries to operate the operation detection unit to unlock the door, if the user accidentally applies an external force to the vehicle before operating the operation detection unit, Even if you are in the detection area, the door is still locked in this state, and the anti-theft device is in a theft monitoring state, so the anti-theft detection sensor detects its external force, which causes the suspicious person to enter the door or window glass. There was a risk that it would be judged as a fraudulent act and an alarm was output.

  The present invention has been made to solve these problems, and even if a smart entry system that requires contact with the vehicle to unlock the door and an antitheft device are both mounted on the vehicle. The purpose is to prevent an alarm from being output accidentally.

  The present invention solves the above-mentioned problem, and transmits a search signal from the in-vehicle device, returns a response signal when the portable device receives the search signal, and detects a contact action to the vehicle when the in-vehicle device receives the response signal. The anti-theft device installed in a vehicle equipped with a smart entry system that unlocks the door when the anti-theft device detects theft of the vehicle, and the anti-theft device detects theft when in a theft monitoring state. An alarm means that outputs an alarm when detected, a release means that cancels the theft monitoring status when the door is unlocked, and an invalidity that disables the alarm output when it detects that a response signal has been received from the portable device It is set as the structure provided with a conversion means.

  According to such a configuration, the smart entry system transmits a search signal from the in-vehicle device, returns a response signal when the portable device receives the search signal, and detects a contact action to the vehicle when the in-vehicle device receives the response signal. Sometimes unlock the door. On the other hand, the anti-theft device outputs an alarm when the anti-theft means detects the theft while the anti-theft device is in the anti-theft state, and releases the anti-theft state when the door is unlocked. Therefore, the anti-theft monitoring state is not canceled by simply receiving the response signal. However, according to the above configuration, the alarm output is invalidated if the response signal is received from the portable device even if the anti-theft device is in the anti-theft state. Therefore, even if the user accidentally applies an impact to the vehicle in an attempt to unlock the door, no warning is output.

  According to the present invention, when both a smart entry system and an anti-theft device that require an operation to the operation detection unit of the vehicle to unlock the door are mounted on the vehicle, the vehicle is in a theft monitoring state. Even if it detects that a response signal from a portable device has been received, the alarm output is invalidated, preventing the alarm from being output accidentally even if the vehicle is accidentally impacted when unlocked. it can.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In each embodiment, the same reference numerals are given to portions corresponding to the matters described in the preceding embodiment, and overlapping description may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. Not only the combination of the parts specifically described in each embodiment, but also the embodiments can be partially combined if there is no particular problem with the combination.

[First Embodiment]
FIG. 1 is a block diagram showing a configuration in which an antitheft device is mounted on a vehicle 1 having a smart entry system according to an embodiment of the present invention.

  This is a vehicle system in which the ECUs mounted on the vehicle 1 are connected in a state where they can communicate with each other via the in-vehicle LAN 2. For convenience, the in-vehicle LAN 2 includes a smart entry ECU 3, a door lock ECU 4, an antitheft device ( Hereinafter, only an example in which a security ECU 5 is connected by a gateway (hereinafter abbreviated as G / W) 6 is illustrated and described. However, a lot of ECUs such as a fuel injection amount, An engine control device for controlling the ignition timing and an airbag ECU for controlling an air bag for protecting an occupant in the event of a vehicle collision are also connected by G / W, and the ECUs are mutually connected via an in-vehicle LAN 2. Can be communicated with each other, or connected to the in-vehicle LAN 2, but can further communicate directly between the ECUs to transmit and receive signals. And are omitted illustrated These will, in the description both.

  The G / W 6 interposed between the in-vehicle LAN 2 and each ECU converts the protocol between each ECU and the in-vehicle LAN 2 and converts a signal transmitted on the in-vehicle LAN 2 into a signal that can be processed in the microcomputer in each ECU. It functions as an interface.

  In FIG. 1, the G / W 6 is configured between the in-vehicle LAN 2 and each ECU. However, these may be configured in advance in each ECU, and if there is an ECU that does not require protocol conversion, The configuration may be such that signals on the in-vehicle LAN 2 are directly captured without going through the G / W 6.

  Next, the configuration and control of each ECU shown in FIG. 1 will be specifically described.

  The smart entry ECU 3 constituting the in-vehicle device executes various controls as a keyless entry system and a smart entry system, and includes a microcomputer (hereinafter abbreviated as a microcomputer) 7 and an interface (hereinafter abbreviated as an I / F) 8. And an output circuit 9. The microcomputer 7 includes a CPU (CPU: Central Processing Unit) 10 and a RAM (RAM: Random Access Memory, a storage device that can be directly accessed from the CPU at high speed because it electrically reads and writes data). , ROM (ROM: Read Only Memory, a storage device whose contents cannot be changed once written) 12, I / O (I / O: Abbreviation of Input / Output, parallel port, serial port, etc.) 13 It is comprised by the well-known 1-chip microcomputer provided with these.

  The CPU 10 in the microcomputer 7 executes various processes including control processes such as the door lock ECU 4 and the security ECU 5 according to a program stored in the ROM 12.

  In addition to the above programs, the ROM 12 in the microcomputer 7 stores various information such as control parameters and vehicle-specific ID codes necessary for the CPU 10 to execute various control processes. However, these control parameters, ID codes, and the like can be electrically rewritten separately from the ROM 12, such as EEPROM (Electronically Erasable and Programmable Read Only Memory). You may make it memorize | store separately in a non-volatile memory.

  Further, the smart entry ECU 3 shown in FIG. 1 is mounted on the vehicle 1 and receives a radio wave from the portable device 14 via a single receiving antenna 45 and transmits to the portable device 14. To lock the outside door transmitter 16 that transmits a search signal via the antenna 46, the touch sensor 17 provided on the door handle of the driver's seat side (hereinafter also referred to as D seat) of the vehicle, and the D seat door. A lock SW 18 provided on the door handle is connected, and these and the portable device 14 constitute a smart entry system.

  The touch sensor 17 and the lock SW 18 are provided on the passenger seat side (hereinafter also referred to as P seat), the rear right seat side (hereinafter also referred to as Rr seat), the rear left seat side (hereinafter also referred to as Rl seat), and the trunk room. Although each door is provided in the same manner, FIG. 1 shows only a D seat door as a representative.

  The touch sensor 17 is a capacitive touch sensor in the present embodiment, but this is only an example, and various types such as an optical type, a resistance film type, and an ultrasonic type may be used as appropriate. The specific method is not particularly limited as long as at least direct contact by the user can be detected.

  The vehicle exterior transmitter 16 is provided corresponding to the D seat door, and the transmission antenna 46 is provided near the door knob of the D seat door. Although the remaining other doors are provided in the same manner as the D seat door, only the D seat door is shown as a representative in FIG.

  The out-of-vehicle transmitter 16 periodically transmits a signal for requesting the portable device 14 to return the ID code unique to the portable device, that is, a search signal for determining whether the portable device 14 corresponds to the vehicle. To do. The search signal transmitted from each door includes an antenna code indicating which door is the search signal transmitted from the vehicle interior transmitter 16.

  An irradiation range (hereinafter also referred to as an area) of a search signal transmitted from the transmission antenna 46 provided at each door is a range of about 70 to 80 cm in radius with the transmission antenna 46 as a center.

  Next, the portable device 14 will be described with reference to FIG. FIG. 2 is a diagram illustrating the configuration of the portable device 14.

  The portable device 14 includes a door lock SW 19 and a door unlock SW 20, a control code generation unit 21, a modulation / amplification unit 22, a transmission antenna 23, a demodulation unit 25, and a reception antenna 26.

  In this embodiment, there are provided two switches: a door lock SW19 that is operated when the door of the vehicle is locked, and a door unlock SW20 that is operated when each door is unlocked. However, the door lock SW19 and the door unlock SW20 do not necessarily have to be configured as separate switches, and needless to say, the lock or unlock control may be switched every time the same switch is operated.

  The receiving antenna 26 receives the search signal transmitted from the transmitting antenna 46, demodulates it by the demodulator 25, and outputs it to the control code generator 21.

  When either one of the door lock SW 19 and the door unlock SW 20 is operated, the control code generating unit 21 modulates and amplifies the control code obtained by adding the ID code unique to the portable device to the function code corresponding to the operated switch. To the unit 22. When the search signal is received, a response code obtained by adding the antenna code included in the search signal and the ID code unique to the portable device is also output to the modulation / amplification unit 22. The modulation / amplification unit 22 modulates a carrier wave (high-frequency signal) with this control code or response code, and appropriately amplifies the modulated signal. Then, the modulated / amplified signal is transmitted as a control signal or a response signal from the transmitting antenna 23 to the in-vehicle receiver 15 by radio waves of a predetermined frequency.

  In this embodiment, the modulation / amplification unit 22 and the transmission antenna 23 are referred to as an RF transmission unit (RF: Radio Frequency) 24. For example, a relatively high frequency of 433 MHz is assigned to the radio wave transmitted from the transmission antenna 23 of the RF transmission unit 24, that is, the frequency of the control signal or the response signal. However, the frequency is not necessarily limited to this radio frequency.

  Furthermore, in the present embodiment, the reception antenna 26 and the demodulation unit 25 are collectively referred to as an LF reception unit (LF: Long Frequency) 27. For example, a relatively low frequency band of 125 kHz or more and 135 kHz or less is assigned as the frequency of the search signal transmitted from the vehicle interior transmitter 16, but is not necessarily limited to this radio frequency.

  The microcomputer 7 periodically transmits a search signal sequentially from the outside transmitter 16 and the transmission antenna 46 of each door. When the person who has the portable device 14 enters the area, the portable device 14 receives the search signal and transmits a response signal. When the microcomputer 7 receives the response signal via the receiving antenna 45 and the vehicle interior receiver 15, the microcomputer 7 extracts the antenna code and the ID code unique to the portable device included in the response signal, and stores the extracted ID code by itself. If it matches the ID code, it is determined that the response signal is from a legitimate portable device. Then, the area where the portable device 14 is located is specified based on the antenna code, and the area information and information indicating that a regular portable device or a user exists in the area (hereinafter referred to as an in-area presence signal) Output to LAN2. Thereafter, when the response signal from the portable device 14 is not received, that is, when it is determined that the person carrying the portable device 14 has moved out of the area, the output of the area information and the in-area presence signal to the in-vehicle LAN 2 is stopped.

  When the door lock SW 19 or the door unlock SW 20 of the portable device 14 is operated, a control signal including a control code including a function code corresponding to the operated switch and an ID code unique to the portable device is transmitted from the portable device 14. Is done. When the microcomputer 7 receives this control signal via the receiving antenna 45, the microcomputer 7 extracts the function code and the ID code. If the ID code matches the ID code stored by itself, the microcomputer 7 can control from the authorized portable device. It is determined that the signal is a signal, and information indicated by the function code, that is, lock or unlock command information is output to the in-vehicle LAN 2.

  Further, when the microcomputer 7 detects that the touch sensor 17 and the lock switch 18 are turned on, the microcomputer 7 similarly outputs the information to the in-vehicle LAN 2. When the ID code extracted from the control signal does not match the ID code stored in the microcomputer itself, an alarm may be output from the portable device 14 and / or the alarm control unit 44.

  Next, the door lock ECU 4 will be described with reference to FIG.

  The door lock ECU 4 executes various types of control as a keyless entry system, includes a microcomputer 28, and further includes an I / F and an output circuit, which are not shown, like the smart entry ECU 3. The door lock ECU 4 is connected to a door switch 29 for detecting the open / closed state of each door, a lock position SW30 for detecting whether or not each door is locked, and a door lock motor 31. Although not shown, each door is provided with a lock mechanism for locking or unlocking the door, and the door lock motor 31 constitutes a lock mechanism.

  The microcomputer 28 is configured by a known one-chip microcomputer including a CPU 32, a RAM 33, a ROM 34, an I / O 35, and the like.

  The CPU 32 of the door lock ECU 4 performs control processing such as locking or unlocking the door according to a control program stored in the ROM 34.

  Generally, when unlocking the D seat door, the door lock motor 31 provided in the D seat door is unlocked by applying a predetermined current. On the other hand, in the case of locking, it can be locked by energizing with the reverse polarity when unlocking.

  Although only one door lock motor 31 is shown in FIG. 1 for the sake of convenience, each door is provided with a door lock motor 31 for each door, so that it is possible to perform lock or unlock control for each door. It has become.

  Further, the control is not limited to each door. For example, when the door lock motor 31 other than the D seat is connected in parallel to the door lock ECU 4, the doors other than the D seat are simultaneously locked or unlocked. It can also be controlled, and all doors can be locked or unlocked simultaneously. The control for each door may be configured to be individually selectable according to the user's preference.

  The microcomputer 28 transmits area information transmitted from the smart entry ECU 3 via the in-vehicle LAN 2, in-area presence signal, lock / unlock command information, various information such as the touch sensor 17 and the lock switch 18, the door switch 29, the lock The door lock motor 31 is controlled based on the input signal of the position SW 30 to control the lock and unlock of the door. The microcomputer 28 outputs the door open / close state detected from the door switch 29 and the door lock state detected from the lock position switch 30 to the in-vehicle LAN 2 via the G / W 6.

  That is, when the microcomputer 28 receives the area information and the in-area presence signal from the smart entry ECU 3 via the in-vehicle LAN 2, the microcomputer 28 determines that the owner of the portable device 14 is in the door detection area for the area information, and waits for unlocking. State. In this state, when the ON signal of the touch sensor 17 is received via the in-vehicle LAN 2, the door lock motor 31 of the door for the area information is controlled and unlocked. Further, when the microcomputer 28 receives the ON signal of the lock switch 18 while receiving the in-area presence signal, the microcomputer 28 controls the door lock motor 31 of all the doors to lock all the doors.

  Further, when the microcomputer 28 receives the lock or unlock command information associated with the operation of the door lock switch 19 and the door unlock switch 20 of the portable device 14 from the smart entry ECU 3 via the in-vehicle LAN 2, the door lock motor 31 similarly. To lock or unlock the door.

  Next, the security ECU 5 will be described with reference to FIG.

  The security ECU 5 executes various types of control as a vehicle antitheft device, includes a microcomputer 47, and further includes an I / F and an output circuit (not shown) like the smart entry ECU 3 and the door lock ECU 4. The security ECU 5 includes a vibration sensor 41 that detects external force and vibration applied to the vehicle, a glass break sensor 42 that detects high-frequency sound generated when the glass is broken, and a radio wave type that detects human movement inside and outside the vehicle. An intrusion sensor 43 and an alarm output unit 44 for outputting an alarm to the periphery of the vehicle when an illegal act on the vehicle 1 is detected are connected.

  The security ECU 5 includes a CPU 36, a ROM 37, a RAM 38, an I / O 39, and a timer 40. These are connected to each other via a communication line different from the in-vehicle LAN 2.

  The CPU 36 of the security ECU 5 performs control processing such as setting the vehicle 1 to a theft monitoring state or a non-theft monitoring state according to a control program stored in the ROM 37.

  Although not shown in the security ECU 5 for the sake of convenience, as means for detecting theft of the vehicle, a change in the open / closed state of the door, trunk, engine hood, etc. is detected by voltage instead of the door switch 29 for detecting the open / closed state of the door. For example, a theft act of the vehicle 1 can be detected by a voltage sensor or a tilt sensor that senses the tilt of the vehicle 1.

  The microcomputer 47 includes area information transmitted from the smart entry ECU 3 via the in-vehicle LAN 2, in-area presence signal, lock / unlock command information, various information such as the touch sensor 17 and the lock switch 18, the vibration sensor 41, the glass Based on the input signals of the crack sensor 42 and the radio wave intrusion sensor 43, the vehicle is controlled to be in a theft monitoring state or a non-monitoring state. Further, the microcomputer 50 outputs the state of the vehicle 1 to the in-vehicle LAN 2 via the G / W 6 based on the input signals of the vibration sensor 41, the glass break sensor 42, and the radio wave type intrusion sensor 43.

  When the microcomputer 47 receives via the in-vehicle LAN 2 that the door of the vehicle 1 output from the door lock ECU 4 has been locked, the microcomputer 47 sets the theft monitoring state of the vehicle 1. Further, when the microcomputer 47 receives via the in-vehicle LAN 2 that the door of the vehicle 1 output from the door lock ECU 4 is unlocked, the microcomputer 47 cancels the theft monitoring state of the vehicle 1, that is, sets the non-theft monitoring state.

  Furthermore, although only a radio wave type intrusion sensor is described in FIG. 1 as a sensor for detecting the movement of a person inside or outside the vehicle, the method for detecting a person's movement is not limited to this, and a high frequency is used. The sensor may be an ultrasonic sensor that detects a sound wave having a frequency of 16 kHz or more with an elastic vibration wave, or a microwave sensor that detects a 300 MHz band radio wave. These theft detection means may be configured to detect theft only by signals individually detected by the sensors as described above, or may be configured to detect theft by an algorithm that takes into account input information from a plurality of sensors. It may be.

  Furthermore, although not shown for convenience, when it is determined that the vehicle 1 is in a stolen state or the vehicle 1 is likely to be stolen, the owner or the monitoring center is notified that the theft has occurred. Control is performed.

  These alarm outputs not only output an abnormal state of the vehicle 1 to the vehicle periphery only by an alarm, but also turn on or blink a horn or hazard lamp provided on the vehicle (not shown). Needless to say, it may be configured to output, or may be configured to notify the abnormality of the vehicle 1 to a wider range by combining these.

  Here, if the operation for locking or unlocking the door and the operation for setting the security ECU 5 to be in a theft monitoring state or a non-monitoring state are set separately, there is a risk that the troublesomeness of the operation may be promoted. It is preferable that the trigger that sets the ECU 5 in the theft monitoring state or the non-monitoring state is interlocked with the lock or unlock of the door.

  In the present embodiment, the smart entry ECU 3, the door lock ECU 4 and the security ECU 5 are described as separately configured systems. However, it is not necessary to control these alone, and these three ECUs are combined. Needless to say, it may be configured as one ECU, or may be used as a system that constitutes the features of the present invention by being configured by various combinations.

  In the smart entry system of the present embodiment, when the user who has the portable device 14 approaches the vehicle 1 and enters the area of the search signal output from the vehicle exterior transmitter 16 of each door, the portable device 14 receives it. A response signal is returned in response to the search signal.

  For example, when the portable device 14 receives a search signal output from the vehicle interior transmitter 16 of the D seat door, an antenna code indicating that the search signal is output from the D seat door, and an ID code unique to the portable device Is generated and returned from the portable device 14 as a response signal.

  The smart entry ECU 3 compares whether or not the ID code included in the response signal matches the ID code stored in the ROM 12 in the microcomputer 7 in advance. If it is determined that the two match, the area where the portable device 14 is located is specified based on the antenna code, the area information and the in-area presence signal are transmitted to the in-vehicle LAN 2, and the portable device 14 receives the information. The door (in this case, the D-seat door) corresponding to the out-of-vehicle transmitter 16 that has output the search signal is placed in the unlock standby state.

  In the case of the conventional smart entry device, the user of the vehicle 1 carrying the portable device 14 with the door (in this case, the D-seat door) corresponding to the transmitter 16 outside the vehicle in the unlock waiting state. Is a system in which the door is unlocked when it touches the touch sensor 17 of the doorknob. In this embodiment, since the conventional smart entry system is further equipped with an anti-theft device, the portable device Even if it is determined that the ID verification between 14 and the smart entry ECU 3 matches, the door of the vehicle is only in the unlock waiting state, and the vehicle 1 is not completely unlocked. That is, the theft monitoring state of the security ECU 5 is continuously maintained.

  When the user tries to touch the touch sensor 17 of the doorknob to unlock the door in the unlock standby state, if the user accidentally touches another part of the vehicle 1 different from the touch sensor 17, even if the vehicle Even if the user is an authorized user, the security ECU 5 determines that the vehicle 1 has been stolen because the theft detection sensor has detected a contact action other than the touch sensor 17 of the vehicle 1, and gives a false alarm. There is a risk of emitting.

  When the smart entry ECU 3 determines that the ID verification between the portable device 14 and the smart entry ECU 3 matches, the smart entry ECU 3 indicates that the door is in the unlock standby state, that is, an in-area presence signal. Is transmitted to the in-vehicle LAN 2 and the signal is received by the security ECU 5 via the G / W 6, and the security ECU 5 is in the unlock standby state, that is, between the portable device 14 and the smart entry ECU 3. It is determined that the ID code matches, and it is determined that the door is unlocked by an authorized user who is not a suspicious person, and a theft detection sensor for detecting theft of the vehicle 1 is temporarily reset.

  Hereinafter, operation | movement of security ECU5 is demonstrated using FIG. FIG. 3 is a flowchart showing processing performed by the microcomputer 47, and is executed every 50 ms, for example.

  In the example of FIG. 3, a control process in the case where the D-seat door is unlocked while holding the portable device 14 in a state where all the doors are locked is shown.

  In the present embodiment, the control process when unlocking the D seat door will be described. However, the doors of the vehicle 1 can be unlocked not only by the D seat door but also by all the doors or each door. The control process for individually unlocking can be executed by the same control process.

  First, in step (hereinafter abbreviated as S) 1, based on the in-area presence signal transmitted from the smart entry ECU 3 to the in-vehicle LAN 2, it is determined whether or not the portable device 14 has entered the detection area from outside the D seat door detection area. to decide. That is, when an in-area presence signal output from the smart entry ECU 3 is detected based on the response signal from the portable device 14, it is determined that the portable device is present in the detection area.

If the microcomputer 7 of the smart entry ECU 3 determines in S1 that the portable device is present in the detection area, that is, if it is determined that the person holding the portable device 14 has entered the area of the D-seat door, the portable device is determined in S2. A flag F ₁ = 1 indicating that 14 has entered the area is set. If it is determined in S1 that there is no person who has the portable device 14 in the area, that is, the response signal from the portable device 14 cannot be received for the search signal, and the microcomputer 7 cannot match the ID code. If it is determined, the determination result is output to the in-vehicle LAN 2 via G / W6, and this signal is fetched by the microcomputer 47 of the security ECU 5 via G / W6, and the flag F ₁ = 0 is set. Here, the flag means a variable or a register indicating information on the state of the program being executed.

Next, in S4, the microcomputer 47 of the security ECU 5 determines whether or not an output from the theft detection sensor has been detected. If the output from the theft detection sensor is detected, the process proceeds to S5, and if the flag F ₂ ← 1 is set and the output from the theft detection sensor is not detected, the process proceeds to S6.

Next, in S6, the microcomputer 47 of the security ECU 5 determines whether or not the flag F ₁ = 1. That is, it is determined whether or not the owner of the portable device 14 is present in the door detection area.

If it is determined in S6 that the flag F ₁ = 1, that is, if it is determined that the owner of the portable device 14 exists in the detection area of the door, the process proceeds to S7, and the flag F 1 is not ₁ in S6. If it is determined, that is, if it is determined that the owner of the portable device 14 does not exist within the detection area of the door, the process proceeds to S10.

Next, in S7, when the microcomputer 7 of the smart entry ECU 3 determines in S6 that the owner of the portable device 14 exists in the door detection area, the owner of the portable device 14 enters the door detection area. It is determined that it exists and is prepared to perform an operation for unlocking the D-seat door, and flag F ₂ = 0 is set. That is, the detection result by the theft detection sensor is reset to enter the unlock standby state.

  Next, in S <b> 8, it is determined whether or not the D seat door is unlocked by the owner of the portable device 14 based on the signal for unlocking the D seat door output from the door lock ECU 4 on the in-vehicle LAN 2. When it is determined that the D seat door is unlocked, the process proceeds to S9.

  In step S9, the theft monitoring state is set to a non-theft monitoring state (alarm output is disabled), and the control process is terminated.

If it is determined in S6 that the flag F ₁ is not 1, that is, if it is determined that the in-area presence signal output from the smart entry ECU 3 is not detected based on the response signal from the portable device 14, S10 Proceed to

In S10, it is determined whether or not flag F ₂ = 1. That is, based on the response signal from the portable device 14, it is determined whether or not there is a detection output from the theft detection sensor without detecting the in-area presence signal output from the smart entry ECU 3.

If it is determined in S10 that the flag F ₂ = 1, the process proceeds to S11. That is, based on the response signal from the portable device 14, if it is determined that the in-area presence signal output from the smart entry ECU 3 is not detected and the detection output from the theft detection sensor is present, the portable device 14 is possessed. It is determined that there was an act of contacting the vehicle by a person who did not.

If it is determined in S10 that F ₂ = 1 is not satisfied, the control process is terminated. That is, based on the response signal from the portable device 14, if it is determined that the in-area presence signal output from the smart entry ECU 3 is not detected and there is no detection output from the theft detection sensor, the door of the vehicle 1 is opened. It is determined that there is no approach or contact to the vehicle of the person carrying the portable device 14 to unlock, and no approach to or contact with the vehicle by a person who does not have the portable device 14 is detected. The control process ends.

  Next, in S11, it is determined whether the security ECU 5 is in a theft monitoring state. If it is determined in S10 that the person who does not have the portable device 14 has made contact with the vehicle, and if it is determined that the vehicle 1 is set in the theft monitoring state, the process proceeds to S12 and an alarm is output.

  At this time, the alarm may be issued by a horn of the vehicle 1 or a high volume alarm for a predetermined period of time, for example, 30 seconds, for an alarm device around the vehicle, a hazard lamp installed in the vehicle 1 in advance, It is also possible to notify the abnormality of the vehicle 1 around the vehicle by alternately repeating the blinking display or lighting display of the light, such as the interior lighting, or the blinking display or lighting display. Further, it goes without saying that an abnormality of the vehicle 1 may be notified by outputting an alarm such as notifying the owner of the vehicle 1 or the monitoring center that the theft has occurred.

Next, in S13, the flag F ₂ is set to 0, and the control process is terminated. That is, the output of the theft detection sensor is reset, that is, the flag is set to 0, and the control process is terminated. In addition, after outputting an alarm in S12, the vehicle may be set to the theft monitoring state again. When the output from the theft detection sensor is reset, the theft monitoring state is also set to the non-theft monitoring state, and the control process is terminated. Needless to say, it may be.

[Second Embodiment]
The anti-theft device of this embodiment is different from the first embodiment in that a trigger operation (hereinafter also referred to as a search signal request instruction) for outputting a search signal output from the smart entry ECU 3 is necessary. The alarm output of the security ECU 5 due to the contact action on the vehicle 1 at the time of the search signal request is delayed until the ID code matching determination between the portable device 14 and the smart entry ECU 3 is completed with respect to the search signal output by It is a point provided with the time measuring means for making it.

  Hereinafter, the operation of the security ECU 5 will be described with reference to FIG. FIG. 4 is a flowchart showing processing performed by the microcomputer 47, and is executed every 50 ms, for example.

  In the present embodiment, as in the first embodiment, a control process for unlocking the D-seat door while holding the portable device 14 in a state where all the doors are locked is shown.

  In the present embodiment, the control process when unlocking the D seat door will be described. However, the doors of the vehicle 1 can be unlocked not only by the D seat door but also by all the doors or each door. The control process for individually unlocking can be executed by the same control process.

  In the present embodiment, since the person who has the portable device 14 outputs a search signal request instruction by performing a contact action on the vehicle body (for example, an action of knocking the glass once), the microcomputer of the security ECU 5 is first configured in S1. 47 determines whether the output from the theft detection sensor has been detected. When the output from the theft detection sensor is detected, the process proceeds to S2, and when the output from the theft detection sensor is not detected, S1 is repeated until the output from the theft detection sensor is detected.

  In this embodiment, the search signal request instruction for outputting the search signal is to knock the glass once. In this case, the security ECU sends sensor output information to the in-vehicle LAN, and the smart entry ECU 3 A search signal is transmitted using information as a trigger. The mode of outputting the search signal is not limited to this mode. For example, the glass is knocked a plurality of times within a predetermined time, or the glass is knocked multiple times and the search signal is output according to the predetermined number of times, or a combination thereof. The method of outputting the search signal and the number of times of knocking the glass may be selected and changed freely according to the user's preference.

  The search signal may be output not only by the method of knocking the glass of the vehicle 1 but also by a configuration in which the search signal is output by touching the door knob of the vehicle 1 or operating a switch provided on the door knob. Needless to say.

  Next, in S2, when a knock on the glass is detected by the vibration sensor 41, the timer 40 in the microcomputer 47 of the security ECU 3 is started (activated).

  Next, in S3, it is determined that the person carrying the portable device 14 by the act of contact with the vehicle 1 has entered the area of the D seat door, and the in-area presence signal received by meeting the in-vehicle LAN 2 from the smart entry ECU. Based on this, the smart entry ECU determines whether or not the ID collation has been obtained. If the ID collation result is obtained, the process proceeds to S4. If the ID collation cannot be obtained, the process proceeds to S6. Since the ID collation method is the same as that in the first embodiment, the description in this embodiment is omitted.

  In S4, based on the determination that the ID code stored in the ROM 12 in the microcomputer 7 of the smart entry ECU 3 matches the ID code of the portable device 14 in S3, the theft monitoring state is set to a non-warning state (warning state). In step S5, the timer 40 in the microcomputer 47 of the security ECU 3 is cleared, and the control process is terminated.

  Next, in S3, when ID collation with portable machine 14 and ID memorized by ROM12 in smart entry ECU3 was not taken, it progresses to S6.

In S6, it is determined whether or not the timer 40 in the microcomputer 47 of the security ECU 3 started in S2 has exceeded 5 seconds. If it is determined in S6 that the timer T has exceeded 5 seconds, the process proceeds to S7, and if it is determined that 5 seconds or more have not elapsed, the process returns to S3.
Here, in this embodiment, the time of the timer T is set to 5 seconds. However, the time is not limited to this time, and it is particularly 5 seconds as long as the ID code stored in the portable device 14 and the ROM 12 can be verified. There is no need to be.

  When it is determined in S6 that the timer T has passed 5 seconds or more, that is, it is determined that there is a detection output from the theft detection sensor to the microcomputer 47, and the ID code authentication of the portable device 14 and the ROM 12 cannot be performed. It is determined that the person who does not have the portable device 14 in the detection area has made contact with the vehicle. Further, when it is determined in S6 that the timer T has not elapsed for more than 5 seconds, that is, it is determined that there is a detection output from the theft detection sensor to the microcomputer 47 and the ID code authentication of the portable device 14 and the ROM 12 cannot be obtained. When this is done, the process returns to S3 for a time during which code authentication can be obtained (5 seconds in this embodiment).

  Next, in S7, it is determined whether the security ECU 5 is in a theft monitoring state. If it is determined in S7 that the person who does not have the portable device 14 in the detection area has made contact with the vehicle and the vehicle 1 is set in the theft monitoring state, the process proceeds to S8, where an alarm is output and the control process is performed. finish.

  At this time, as in the first embodiment, the alarm may be issued by a warning for a predetermined time, for example, 30 seconds, for the horn of the vehicle 1 or a loud sound for the surroundings of the vehicle, and the vehicle 1 is provided in advance. It is also possible to notify the abnormality of the vehicle 1 around the vehicle by alternately repeating the blinking display or lighting display of the light, such as the hazard lamp or the interior lighting, or the flashing display or lighting display. Further, it goes without saying that an abnormality of the vehicle 1 may be notified by outputting an alarm such as notifying the owner of the vehicle 1 or the monitoring center that the theft has occurred. In addition, after outputting an alarm in S8, the vehicle may be set to the theft monitoring state again. When the output from the theft detection sensor is reset, the theft monitoring state is also set to the non-theft monitoring state, and the control process is terminated. Needless to say, it may be.

  If the vehicle 1 is not set in the theft monitoring state in S7, that is, if it is determined that the person who has made contact with the vehicle 1 is no longer in the detection area, the process proceeds to S5 and the timer T is cleared and the control process is performed. finish.

It is a block diagram of the antitheft device which concerns on the 1st Embodiment of this invention. It is a block diagram showing the structure of a portable machine. It is a flowchart which shows the control processing of the antitheft device of 1st Example. It is a flowchart which shows the control processing of the antitheft device of 2nd Example.

Explanation of symbols

1 Vehicle 2 Car LAN
3 Smart entry ECU
4 Door lock ECU
5 Security ECU
6 G / W
7 Microcomputer 8 I / F
9 Output circuit 10 CPU
11 RAM
12 ROM
13 I / O
14 Portable device 15 Car interior receiver 16 Outside transmitter 17 Touch sensor 18 Lock SW
19 Lock button 20 Unlock button 21 Control code generator 22 Modulator / amplifier 23 Transmit antenna 24 RF transmitter 24
25 Demodulator 26 Reception Antenna 27 LF Reception 27
28 Microcomputer 29 Door switch 30 Lock position SW
31 Lock motor 32 CPU
33 RAM
34 ROM
35 I / O
36 CPU
37 ROM
38 RAM
39 I / O
40 timer 41 vibration sensor 42 glass break sensor 43 radio wave type intrusion sensor 44 alarm output unit 45 reception antenna 46 transmission antenna 47 microcomputer

Claims (5)

A system that transmits a search signal from an in-vehicle device, returns a response signal when the portable device receives the search signal, and unlocks the door when a contact action to the vehicle is detected when the in-vehicle device receives the response signal An anti-theft device mounted on a vehicle comprising:
A theft detection means for detecting vehicle theft,
Alarm means for outputting an alarm when the theft detection means detects the theft when in the theft monitoring state; and
Release means for canceling the theft monitoring state when the door is unlocked and invalidation means for invalidating the output of the alarm when it is detected that a response signal from the portable device has been received. Anti-theft device. A transmission means for transmitting a search signal;
A portable device that returns a response signal upon receiving the search signal;
An unlocking means for unlocking the door when an operation to the operation detection unit provided in the vehicle is detected when the response signal is received;
A theft detection means for detecting vehicle theft,
Alarm means for outputting an alarm when the theft detection means detects the theft when in the theft monitoring state; and
Release means for releasing the theft monitoring state when the door is unlocked, and invalidation means for invalidating the output of the alarm when it is detected that a response signal from the portable device has been received. Anti-theft device. When an operation to the operation detection unit provided in the vehicle is detected, a search signal is transmitted from the in-vehicle device. When the portable device receives the search signal, a response signal is returned, and when the in-vehicle device receives the response signal, the door An anti-theft device mounted on a vehicle equipped with a system for unlocking,
A theft detection means for detecting theft of the vehicle;
Alarm means for outputting an alarm when the theft detection means detects the theft when in the theft monitoring state; and
An anti-theft device comprising invalidating means for invalidating the output of the alarm for a predetermined time when the theft detecting means detects the theft.   4. The antitheft device according to claim 3, wherein an alarm is output when a response signal from the portable device cannot be received within the predetermined time after the theft detection means detects the theft. When an operation to the operation detection unit provided in the vehicle is detected, a search signal is transmitted from the in-vehicle device. When the portable device receives the search signal, a response signal is returned, and when the in-vehicle device receives the response signal, the door An anti-theft device mounted on a vehicle equipped with a system for unlocking,
A theft detection means for detecting vehicle theft,
Alarm means for outputting an alarm when the theft detection means detects theft when in a theft monitoring state; and
An antitheft device comprising invalidating means for invalidating the output of the alarm for a predetermined time when an operation to an operation detection unit provided in the vehicle is detected.

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