JP6300539B2 - Key-free portable device lock-in prevention device - Google Patents

Description

  The present invention provides a key for performing radio wave transmission / reception between a portable device carried by a driver and a control unit provided in the own vehicle, recognizing that the portable device is genuine, and performing predetermined control. TECHNICAL FIELD The present invention relates to a key-free portable device closing prevention device that is mounted in a free system and prevents the portable device from being locked into a vehicle compartment when the portable device is forgotten.

  Conventionally, wireless communication is performed between a key-free system, that is, a portable device carried by a driver and a control unit provided in the host vehicle, and a predetermined control is performed by recognizing that the portable device is genuine. In a vehicle equipped with a function for performing the function, a device for notifying the closure of the key-free portable device that prevents the portable device from being closed in the vehicle interior due to forgetting to carry the portable device has been proposed (for example, Patent Document 1). .

  In addition, it is also considered that control is performed so that the door is not locked when it is detected that the key-free portable device is closed in the vehicle interior. At this time, in order to prevent confinement in the trunk room, the lock is generally prohibited and the trunk is automatically opened by the same operation.

  Specifically, low frequency (LF) antennas that transmit and receive radio waves are arranged in doors, trunk rooms, vehicle interiors, and bumpers, and radio waves transmitted from these antennas are received by portable devices that approach within a predetermined distance, When the reception result transmitted from the portable device by radio wave is received via the antenna, the mobile device recognizes that the portable device is genuine, and the electric field strength of the radio wave depends on the distance from the antenna to the portable device. Because it is different, by grasping the electric field strength of radio waves when transmitting and receiving, the distance from the antenna to the portable device can be known, it can be judged whether the portable device is inside or outside the vehicle cabin or inside the trunk, and the portable device can be closed Can be prevented.

JP 2001-207709 A (see paragraphs 0014 to 0023)

  However, in the conventional device that prohibits the locking (locking) of the door when the portable device is closed as described above, especially in the case of the trunk room, unlike the door, the trunk lid is formed of a single sheet metal and is thin. In many cases, the distance from the interior material surface to external sales is short, and the leakage of radio waves to the outside from the LF antenna installed in the trunk increases. In addition to such leakage of radio waves, the LF antenna and transmission / reception For example, when the request switch provided in the trunk room is operated with a bag with a portable device placed at a distance greater than a preset distance from the host vehicle, the trunk room is locked. Although it is possible to release the trunk lid and release it, it is very convenient for practical use. Misidentified to exist away in. As a result, the same as have left the portable device in the trunk room, the trunk is not locked to prevent confinement of the portable device.

  In other words, the portable device is located within the predetermined distance and in the trunk room even though the portable device is more than the predetermined distance from the LF antenna outside the trunk room, and the portable device is closed. If it is misunderstood, the lock-in prevention function works and the trunk cannot be locked even if it wants to be locked.

  An object of the present invention is to learn a state where the portable device is outside the vehicle and within a predetermined distance, and to improve the determination accuracy of whether the portable device is inside or outside the vehicle.

In order to achieve the above-described object, the key-free portable device lock-in prevention device of the present invention transmits and receives radio waves between a portable device carried by a driver and a control unit provided in the host vehicle. A device for preventing the lock of a key-free portable device that is mounted in a key-free system that recognizes that the portable device is genuine and performs predetermined control, and prevents the portable device from being locked into the vehicle or the like due to forgetting to carry the portable device. , A transmission / reception antenna provided on a vehicle body, and a verification signal using a radio wave having a predetermined intensity set in advance via the antenna, and the verification signal received from the portable device located within a predetermined distance from the host vehicle it in the presence and receiving means for receiving it when the response signal is transmitted, the portable device is a vehicle exterior from the vehicle within said predetermined distance representing the failure diagnosis of the dealer By location is set to the connected learning mode, as was meet predetermined holding conditions predetermined field intensity of the verification signal when the received verification signal the portable device from said transmitting and receiving means A holding means for holding the closed prevention threshold value and learning the closed prevention threshold value by repeating this, and a response signal indicating that the verification signal has been received from the portable device; And determining means for determining whether or not the portable device is closed based on whether the radio wave intensity of the verification signal is higher than a closing prevention threshold value held by the holding means. The

According to the present invention, when the portable device receives a verification signal from the transmission / reception means when the portable device is outside the vehicle and within a predetermined distance from the host vehicle when the predetermined holding condition is satisfied. Is held in the holding means as a lock-up prevention threshold, and the holding signal holds the signal strength of the verification signal when a response signal indicating that the verification signal is received from the portable device is transmitted. Since the determination means determines whether the portable device is closed or not based on whether or not the threshold value is higher than the closed prevention threshold value, there is radio wave leakage from the transmission / reception antenna and variations in accuracy of the transmission / reception antenna and transmission / reception means. In addition, it is possible to learn the radio field intensity of the verification signal when the portable device is outside the passenger compartment, and it is possible to improve the determination accuracy of whether the portable device is inside or outside the vehicle. Furthermore, in the case of a trunk room, the thickness of the trunk lid is larger than the door in terms of leakage of radio waves to the outside. Therefore, in order to hold the radio wave intensity of the verification signal when the portable device receives the verification signal from the transmission / reception means as a closing prevention threshold, the verification signal in the state where the portable device is outside the trunk room (outside the vehicle) The radio field intensity can be learned, and the accuracy of determining whether the portable device is inside or outside the trunk room can be improved.

It is a schematic block diagram of one Embodiment of the lockup prevention apparatus of the key-free portable machine which concerns on this invention. It is a block diagram of one embodiment.

  An embodiment of the present invention will be described in detail with reference to the schematic configuration diagram of FIG. 1 and the block diagram of FIG.

  As shown in FIG. 1, a transmitting antenna 2a for transmitting and receiving low frequency (LF) radio waves is provided in the vicinity of the door knob of the driver's seat side door 1a of the host vehicle 1 and on the inner surface side of the trunk lid 1b in the trunk room. 2b is provided, and a receiving antenna 2c for receiving high-frequency (RF) radio waves is provided in a key-free ECU, which will be described later, and transmission / reception described later is performed via these transmitting antennas 2a, 2b and the receiving antenna 2c. When a verification signal using a radio wave of a predetermined intensity is transmitted from the means and a response signal as a result of receiving the verification signal is transmitted from a portable device carried by the driver, transmission / reception is performed via the transmission / reception antennas 2a and 2b. The response signal is received by the means.

  At this time, the radio field strength (electric field strength) of the low-frequency (LF) verification signal respectively transmitted through the transmission antennas 2a and 2b is later determined when the driver approaches within a predetermined distance from the antenna. In order to be able to transmit and receive radio waves between the transmitting / receiving means described in detail and the portable device, it is determined in consideration of the thickness, structure, material, etc. of the sheet metal of the door 1a and the trunk lid 1b in addition to the size of the host vehicle 1 Basically, the radio wave intensity (electric field intensity) of the verification signal transmitted from the transmission / reception means is known at the design stage.

  And the anti-locking device 10 for preventing the key-free portable device from closing into the vehicle compartment including the inside of the trunk room is configured as shown in FIG. That is, as shown in FIG. 2, a key-free ECU 11 having a microcomputer configuration transmits a verification signal based on radio waves of design strength via the transmission antennas 2a and 2b, and at a predetermined distance from the host vehicle 1. When a response signal of high frequency (RF) indicating that the verification signal is received is transmitted from the portable device 15 located inside, the response signal is received via the receiving antenna 2c.

  Further, the portable device 15 unlocks (unlocks) the trunk lid 1b in addition to the lock switch and unlock switch for locking (locking) and unlocking (unlocking) all the doors including the driver side door 1a. For example, when a lock switch or unlock switch is operated, an operation signal based on the operation of the lock switch or unlock switch is transmitted by the key-free ECU 11 via the transmission antennas 2a and 2b. The door lock motor actuator 12 is received, the door lock motor is driven, and the door is locked and unlocked. Similarly, when the trunk switch is operated, the trunk lid 1b is unlocked by the control of the key-free ECU 11.

  The trunk lid 1b is provided with a request switch 16 for manually unlocking the trunk lid 1b. When the request switch 16 is operated, the trunk switch 1b is operated in the same manner as when the trunk switch of the portable device 15 is operated. The trunk lid 1b is unlocked by the control of the key-free ECU 11. The opening / closing state of the trunk lid 1b is detected by the trunk sensor 17, and the detection signal is output to the key-free ECU 11. The key-free ECU 11 detects the opening / closing state of the trunk lid 1b. Such a transmission / reception function of the key-free ECU corresponds to the transmission / reception means in the present invention.

  By the way, as described above, the trunk lid 1b of the trunk room is composed of one sheet metal, and is often thinner than the door 1a or the distance from the interior material surface to the outside sales is often short. The leakage of radio waves from the outside to the outside increases, and there is a variation in the transmission / reception accuracy of the transmission antennas 2a and 2b and the reception antenna 2c in the key-free ECU 11, so that the portable device 15 is inside or outside the vehicle with the door 1a in between. Since there is a conventional problem that the accuracy of determination as to whether it is inside or outside the trunk room is poor compared to the accuracy of the determination, the verification signal in the state where the portable device 15 is outside the trunk room is improved in order to improve the determination accuracy. The following configuration is adopted so as to learn the radio field intensity.

  That is, when the driver brings the vehicle 1 to the dealer and the serviceman performs a failure diagnosis by the failure diagnosis device 20 at the dealer, the failure diagnosis device 20 is provided with a learning mode in advance, and the portable device 15 is outside the vehicle and When the failure diagnosis device 20 is connected to the key-free ECU 11 and is set to the learning mode that is a predetermined request while being within a predetermined distance from the vehicle 1, it is assumed that a predetermined holding condition is satisfied and the key-free ECU 11 is satisfied. Is stored in the memory 11a, which is a holding means provided in the key-free ECU 11, as a lock-in prevention threshold value, and this is repeated. To improve the accuracy by learning the threshold for prevention of lockup, and then key-free with the portable device 15 Based on whether the radio field intensity of the verification signal when the verification signal and the response signal are transmitted / received to / from the CU 11 is higher than the containment prevention threshold stored in the memory 15a from the mobile device 15, the mobile device 15 The presence or absence of confinement in the trunk room is determined. Such determination processing by the key-free ECU 11 corresponds to determination means in the present invention. It should be noted that the determination of whether or not there is a confinement depending on whether or not the threshold value is higher than the confinement prevention threshold value held in the memory 15a may be performed by the processing unit on the portable device 15 side. The 15-side processing unit corresponds to the determination means in the present invention.

  At this time, as described above, due to variations in transmission / reception accuracy of the transmission antennas 2a and 2b and the reception antenna 2c in the key-free ECU 11, the radio field intensity of the verification signal received by the portable device 15 varies. A radio field intensity range can be set in advance by adding the above-described variation to the design value of the radio field intensity of the verification signal transmitted by the ECU 11, and at the time of the above-described learning, the portable device 15 is outside the vehicle and is a predetermined distance from the own vehicle 1. It is also learned that the radio field intensity of the verification signal when the portable device 15 receives the verification signal from the key-free ECU 11 when the predetermined holding condition is satisfied is within the set radio field intensity range. It is desirable to put in the holding conditions for. That is, when the failure diagnosis device 20 is connected to the key-free ECU 11 and set to the learning mode with the portable device 15 outside the vehicle and within a predetermined distance from the host vehicle 1, the verification signal from the key-free ECU 11 If the radio signal strength of the verification signal when the portable device 15 receives the signal is within the predetermined radio field strength range set as described above, it is assumed that the holding condition is satisfied, and the radio signal strength of the verification signal at that time is prevented from being confined. When the threshold value is held, the determination accuracy can be further improved.

  Actually, when the portable device 15 is left in the trunk room, the radio wave intensity of the verification signal received from the key-free ECU 11 received by the portable device 15 is close, so that the lock-in prevention threshold value held in the memory 11a is stored. It is determined that the portable device 15 is present in the trunk room and may be closed, and an alarm is issued, and even if the track lid 1b is closed, locking (locking) is prohibited. Even if you want to lock it, it is not locked and it is prevented from closing.

  On the other hand, if the radio field intensity of the verification signal received from the key-free ECU 11 received by the portable device 15 is lower than the threshold value stored (learned) in the memory 11a, it is determined that the portable device 15 is outside the trunk room with high accuracy. The track lid 1b is locked (locked) by the closing operation, and is always locked when the driver locks the trunk lid 1b.

  Therefore, according to the above-described embodiment, the failure diagnosis device 20 is connected to the key-free ECU 11 and the learning mode is set while the portable device 15 is outside the trunk room (outside the vehicle) and within a predetermined distance from the host vehicle 1. As a result, when the predetermined holding condition is satisfied, the radio wave intensity of the verification signal when the portable device 15 receives the verification signal from the key-free ECU 11 is held in the memory 11a as a confinement prevention threshold value. Based on whether the radio wave intensity of the verification signal when the response signal indicating the reception of the verification signal is transmitted from the portable device 15 is higher than the confinement prevention threshold held in the memory 11a, the portable device In order to determine whether or not 15 is closed, radio wave leakage from the transmission / reception antenna 2b, transmission antennas 2a and 2b, reception antennas in the key-free ECU 11 Even if there is a variation in the transmission / reception accuracy of 2c, it is possible to learn the radio field intensity of the verification signal when the portable device 15 is outside the passenger compartment, and improve the accuracy of determining whether the portable device 15 is inside or outside the trunk room can do.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the case where the failure diagnosis apparatus 20 is connected to the key-free ECU 11 and the learning mode is set is described as the predetermined holding condition. A predetermined holding condition may be satisfied when the trunk lid 1b is opened or closed.

  In addition, the portable device 15 is provided with a memory 15a as a holding means, and the radio wave intensity data is held in the memory 15a for learning. In this case, the radio wave intensity data held in the memory 15a from the portable device 15 to the key-free ECU 11 And the key-free ECU 11 performs the comparison determination. Further, the memory 15a holds together with data indicating that the portable device 15 is located outside the trunk room and within a predetermined distance, together with the radio wave intensity data (threshold prevention threshold value) itself. Data may be transmitted from the portable device 15 to the key-free ECU 11.

  Further, when learning data is held in the memory 15a of the portable device 15, the portable device 15 compares the held data in the memory 15a with the radio wave intensity of the current verification signal to determine whether the portable device 15 is inside or outside the trunk room. The portable device 15 may have a function of performing the determination.

  In the above-described embodiment, the case where the threshold value for preventing the portable device 15 from entering the trunk room is learned has been described. However, the door including the driver's seat side door 1a is made of resin and the trunk lid 1b. As described above, the present invention can be similarly applied even when the thickness of the transmission / reception antenna 2a is small and leakage of the radio wave to the outside is large.

DESCRIPTION OF SYMBOLS 1 ... Own vehicle 2a, 2b ... Transmission antenna 2c ... Reception antenna 10 ... Close-up prevention apparatus 11 ... Key-free ECU (transmission / reception means, determination means)
11a, 15a ... Memory (holding means)

Claims (1)

Installed in a key-free system that transmits and receives radio waves between a portable device carried by the driver and a control unit provided in the host vehicle, recognizes that the portable device is genuine, and performs predetermined control In the device for preventing the lock of the key-free portable device that prevents the portable device from being closed due to forgetting to carry the portable device,
A transmission / reception antenna provided on the vehicle body;
When a response signal indicating that the verification signal has been received from the portable device located within a predetermined distance from the own vehicle is transmitted via the antenna through a predetermined radio wave having a predetermined intensity. A transmission / reception means for receiving this,
Wherein in the presence portable device from the vehicle to a vehicle exterior to said predetermined distance, that the trouble diagnosis device for the dealer is set to the connected learning mode, as was meet predetermined holding condition predetermined The radio wave intensity of the verification signal when the portable device receives the verification signal from the transmission / reception means is held as a confinement prevention threshold, and the confinement prevention threshold is learned by repeating this. Holding means;
Based on whether the radio field intensity of the verification signal when a response signal indicating that the verification signal has been received from the portable device is higher than a containment prevention threshold held in the holding unit, A device for preventing closure of a key-free portable device, comprising: determination means for determining whether the portable device is closed.

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