JP2017043254A - Getting-off warning device in electronic key system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately notify a driver, who has got off and is leaving a vehicle with a selection lever set to a range other than a P range and a power mode switched to an ACC mode, of the power mode failed to be off.SOLUTION: A getting-off warning device in an electronic key system for a vehicle is configured to recognize position information (a distance from the vehicle and an orientation to the vehicle) of a driver on the basis of information detected by a driver detection device 27, direct a directional sounding device 23 to the driver, and then output a warning sound with a sound pressure, frequency and a sound pattern which are suitable to a distance between the directional sounding device 23 and the driver (S7), when having detected a state that the driver with the electronic key 8 had got off the vehicle (S4, S5), with a selection lever set to a range other than a P range (S2) and a power mode switched to an ACC mode (S3) after the vehicle stopped (S1).SELECTED DRAWING: Figure 3

Description

  The present invention relates to an exit warning device for a vehicular electronic key system that issues a warning to a user when a user carrying an electronic key leaves the vehicle with the power mode set to the accessory mode.

  2. Description of the Related Art Conventionally, vehicles equipped with an electronic key system do not perform key operations after a user who carries an electronic key (in many cases, a driver is referred to as a “driver” in the following) gets on the vehicle. By simply pressing a push engine switch (start switch), the power can be turned on or the engine can be started.

  When starting the engine, the driver depresses the push engine switch by depressing the brake pedal in a state where the select lever is set to the parking (P) range or the neutral (N) range. Then, the starter motor operates for a predetermined time, and the engine starts.

  Also, if the push engine switch is pressed while the select lever is set to the P range and the brake pedal is not depressed, the power mode of the vehicle changes from OFF mode → accessory (ACC) mode → ON ( IGN) mode. Further, when the push engine switch is pressed while the select lever is set to a range other than the P range, the power mode is switched from the ON (E / G RUN) mode to the ACC mode.

  In the ACC mode, the engine is stopped, but battery power is supplied to specific electrical components (audio, power socket, car navigation, etc.).

  Normally, when the power mode is the ACC mode, the combination meter is turned off to suppress battery consumption, and therefore, the driver is easily misunderstood that the power mode is switched to the OFF mode. In particular, the electronic key system misunderstands that the power mode is switched to the OFF mode because the driver can easily get off while carrying the electronic key even when the power mode is the ACC mode. In this case, it is easy to get away from the vehicle without noticing.

  When the power supply mode is the ACC mode, the steering lock is in the unlocked state, so that it is likely to start unattended or be stolen. Therefore, in the vehicular electronic key system, when the driver carrying the electronic key gets off even though the power supply mode is in the ACC mode, the driver is warned and alerted. I am doing so.

  However, the driver has a preconception that the power has already been turned off in a series of operations until the driver opens the driver's seat door and gets off, and then closes the driver's seat door and leaves the vehicle. Therefore, there is a case where the user is separated from the vehicle without noticing that the alarm is directed toward himself / herself.

  As a countermeasure, for example, in Patent Document 1 (Japanese Patent Laid-Open No. 2008-168762), the select lever is set to a range other than the P range or the N range, and the push engine switch is turned on (therefore, the power supply mode is A technique is disclosed that warns the driver of forgetting to turn off the power by temporarily turning on the instrument illumination when the power supply control unit detects that the ACC mode has been performed.

JP 2008-168762 A JP 2008-106579 A

  However, the driver who is about to get off mistakes that the power is turned off, so even if the instrument lighting is temporarily turned on, it is often not noticed. This is not preferable in terms of security because the vehicle temporarily becomes unmanned.

  Therefore, for example, in Patent Document 2 (Japanese Patent Application Laid-Open No. 2008-106579), a distance that the driver carrying the portable device (electronic key) is separated from the own vehicle is transmitted from the portable device that receives the outdoor antenna. A technique is disclosed that makes a determination based on the received electric field strength of a radio wave and changes the volume of an alarm according to the distance.

  According to the technique disclosed in Patent Document 2, the warning sound is increased in accordance with the distance from the driver's own vehicle, but the vehicle is parked and separated in a parking lot beside a highway. For example, when there is an external environment with a high noise level in the suburbs, even if the warning sound is simply set based on the distance from the driver's own vehicle, the warning sound is difficult to reach the driver.

  However, considering the noise of the external environment from the beginning, setting a high initial value for the warning sound not only makes the driver uncomfortable, but also causes noise damage to the surroundings in quiet residential areas. There is a possibility that.

  In view of the above circumstances, the present invention detects a user who leaves the vehicle in the accessory mode in the power mode after the engine stops without causing discomfort to the driver and without causing noise damage to the surroundings. It is another object of the present invention to provide a vehicle warning device for an electronic key system for a vehicle that can accurately notify the user of forgetting to turn off the power.

  An exit warning device for an electronic key system for a vehicle according to the present invention includes stop detection means for detecting stop of a vehicle, position determination means for determining whether or not the select lever is set in a range other than the parking range, and a power mode. Power supply mode determination means for determining whether or not the vehicle is in accessory mode, getting-off detection means for detecting the getting-off of the user carrying the electronic key, and position recognition means for recognizing the position of the user who has detected getting-off by the getting-off detection means And an alarm driving unit that drives an alarm output unit that emits an alarm sound, and the stop detection unit detects the stop of the vehicle, and the position determination unit sets the select lever to a range other than the parking range. And the power mode determining means determines that the power mode is the accessory mode, and When detecting getting off of the user in getting off detecting means comprises together drives the alarm driving section, and a warning display processing means for directing the alarm output unit to the position direction of the user recognized by the position recognizer.

  According to the present invention, when the selection lever is set to a range other than the parking range and the power mode is set to the accessory mode, when the user gets off the vehicle, the alarm driving unit is driven to generate an alarm sound. Since the alarm output unit is directed toward the position of the user, the user who wants to move away from the vehicle can be accurately notified of forgetting to turn off the power. In addition, since the alarm output unit is directed toward the user's position, the alarm sound can be transmitted to the user with certainty, so that the user is not uncomfortable and the surroundings are not affected. It is also possible to prevent noise damage.

Schematic plan view of a vehicle equipped with an in-vehicle control system Schematic configuration diagram of in-vehicle control system Flowchart showing an exit warning processing routine Flowchart showing warning display processing subroutine Flow chart showing audio volume processing subroutine Flowchart showing ACC → OFF processing routine It shows the output characteristics of alarm sound according to the separation distance of the driver who gets off, (a) is a conceptual diagram of a sound pressure table, (b) is a conceptual diagram of a frequency table, (c) is a conceptual diagram of a sound pattern table, (D) is explanatory drawing which shows the alarm characteristic for every sound pattern

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a driver's seat 32, a passenger seat 33, and a rear seat 34 are provided in a passenger compartment 31 a of a vehicle 31 such as an automobile, and a driver's seat door 35 that constitutes a vehicle door. A passenger seat door 36, rear left and right doors 37a and 37b, and a rear gate 38 are provided to be freely opened and closed. In addition, an instrument panel 25 for providing a combination meter or the like is provided in the front part of the passenger compartment 31a, and a center console 39 is provided between the driver seat 32 and the passenger seat 33, so that driving can be performed. A handle 26 is disposed in front of the seat.

  As shown in FIG. 2, the vehicle-mounted control system 1 is mounted on the vehicle 31. This in-vehicle control system 1 includes an electronic key control unit (electronic key_ECU) 2, an engine control unit (E / G_ECU) 3, an audio control unit (audio_ECU) 4, and a getting-off warning control unit ( Alighting warning_ECU) 6 and the like are provided.

  Each of the ECUs 2 to 4 and 6 is mainly composed of a microcomputer and has a well-known CPU, ROM, RAM, nonvolatile memory, and the like, and various programs executed by the CPU, fixed data, and the like are stored in the ROM. It is remembered. The ECUs 2 to 4 and 6 are connected to each other through an in-vehicle communication line 7 such as CAN (Controller Area Network) communication.

  The electronic key_ECU 2 communicates with an electronic key (portable device) 8 carried by the driver, and when the ID of the electronic key 8 matches the ID registered in the electronic key_ECU 2, the vehicle doors 35, 36. , 37a, 37b can be locked / unlocked, the engine can be started / stopped, and the battery power VBT can be supplied to the in-vehicle device. A push engine switch that is an ON switch, a communication circuit unit 9 that transmits an identification signal and a request signal to the electronic key 8 and receives an identification signal and the like transmitted from the electronic key 8 to the input side of the electronic key_ECU 2 10 etc. are connected. Further, a brake signal for detecting depression of the brake pedal by the getting-off warning_ECU 6 and a position signal for detecting the set position of the select lever are respectively input to the electronic key_ECU 2.

  In addition, the communication circuit unit 9 is provided. A plurality of antennas 9 a to 9 e for transmitting and receiving signals to and from the electronic key 8 are provided. As shown in FIG. 1, the outdoor side antennas 9a and 9b are disposed outside the passenger compartment door 35 and the passenger seat door 36, the outdoor rear antenna 9c is disposed outside the rear gate 38, and The indoor antennas 9d and 9e are disposed, for example, at the front portion of the center console 39 and the center of the rear seat 34, respectively.

  In addition, a switch unit of the power supply unit 13 and the starter relay 14 is connected to the output side of the electronic key_ECU 2, and a starter motor 15 is connected to one of the fixed contacts of the starter relay 14. A battery power supply VBT is connected to the other fixed contact of the power supply unit 13 and the starter relay 14.

  The power supply unit 13 switches the power supply mode for supplying the battery power supply VBT to any one of the power supply OFF mode, the ACC mode, and the power supply ON (IGN) mode in response to a power supply switching signal from the electronic key_ECU2. Here, when the power mode is the power OFF mode, the supply of the battery power VBT to the electrical components other than the electrical components directly connected to the battery power source is cut off. On the other hand, in the ACC mode, the audio device, the power socket, etc. Battery power VBT is supplied only to specific electrical components. Therefore, the engine is stopped in the power OFF mode and the ACC mode. In the power ON mode, battery power VBT is supplied to all electrical components.

  In this power supply mode, every time the push engine switch 10 is turned ON with the select lever set to the P range, for example, as shown by a solid line in FIG. 2, the power OFF → ACC → power ON (IGN). When the push engine switch 10 is further turned on, the power is turned off. When the push engine switch 10 is turned on with the select lever set to a range other than the P range when the vehicle is stopped, the power supply mode is not switched to the OFF mode but to the ACC mode, as shown by the broken line in FIG. Is stopped.

  In order to restart the engine from the state where the select lever is set to a range other than the P range and the engine is stopped (the power mode is the ACC mode), first, the select lever is set to the P range or Set to N range, then depress the brake pedal, and in that state, push engine switch 10 is turned on. Then, the electronic key _ECU 2 switches the power supply mode of the power supply unit 13 to the power supply ON mode, turns on the starter relay 14 for a predetermined time, supplies the battery power VBT to the starter motor 15 and starts the engine.

  Further, when the engine is started by the starter motor 15, the E / G_ECU 3 starts ignition timing control and fuel injection control to operate the engine.

  Also, the audio_ECU 4 comprehensively integrates audio devices (car stereo, car navigation, etc.) that are turned on by the operations of passengers including the driver when the power mode of the power supply unit 13 is set to ACC or power ON. The sound of the volume set by the passenger is output from the speaker 19. When the driver carrying the electronic key 8 forgets to turn off the power mode and gets off in the ACC mode, an alarm is issued. If the audio volume is higher than the alarm sound pressure, the audio volume Is reduced to a predetermined level.

  Further, the getting-off warning_ECU 6 detects the depression of the brake pedal on the input side and outputs an ON signal, the select switch sensor 12 that detects the set position of the select lever, the vehicle speed sensor 16 that detects the vehicle speed, and the getting-off detection A device 20, a driver detection device 27 that acquires the position information of the driver who got off the vehicle, a front recognition camera 41, and the like are connected. Further, electric field strength data from the electronic key 8 detected by the electronic key _ECU 9 is input to the getting-off warning_ECU 6.

  The getting-off detection device 20 detects an action when the driver is about to get off. Specifically, the getting-off detection device 20 is attached to a driver seat belt switch that is turned on when the seat belt is removed, and an inner door knob of the driver seat door 35. One of a contact sensor such as an electrostatic sensor or a touch sensor that detects that the driver has touched the inner door knob, a door switch that is turned on when the driver's seat door 35 is opened, or a combination thereof. It is configured.

  The driver detection device 27 acquires position information (a distance and a direction from a directional sounding device 23 described later) of a driver who is about to get off the vehicle 31, and reflects a reflected wave from the driver. There are a reflected wave sensor such as a laser or sonar that receives wave information to acquire position information, an in-vehicle camera or an out-of-vehicle camera that recognizes a driver from a captured image and acquires position information.

  By the way, as shown in FIG. 1, the timing for detecting the driver's getting off is roughly divided into the initial stage I in which preparations for getting off in the passenger compartment 31a are being made, and the driver's seat door 35 is opened to get off the vehicle. There are four stages: a transition stage II, a getting-off stage III where the driver's seat door 35 is closed and getting off the vehicle, and a separation stage IV which is separated from the vehicle 31. Which stage or a combination of a plurality of stages is detected for each vehicle type depending on the type of vehicle.

  For example, a representative driver detection device 27 employed when trying to acquire position information of a driver who is about to get off at the initial stage I and the transition stage II is a driver's seat seat disposed in the vehicle. In-vehicle camera and in-vehicle reflected wave sensor for recognizing a characteristic part such as the head of the driver seated on 32, or a change in electric field strength when radio waves from the electronic key 8 are received by the indoor antenna 9d. . At this time, whether or not the driver carries the electronic key 8 is based on the change in electric field strength when radio waves from the electronic key 8 are received by the antennas 9a to 9e (mainly the indoor antenna 9d). judge.

  A typical example of the driver detection device 27 used when acquiring the getting-off position of the driver who got off at the getting-off stage III and the separation stage IV is the head of the driver who got out of the car and got off the car. There are an out-of-vehicle camera, an out-of-vehicle reflected wave sensor, etc. for recognizing such a characteristic part. Further, at least the position information of the driver at the getting-off stage III can be acquired based on the change in the received electric field strength of the radio wave from the electronic key 8 received by each outdoor side antenna 9a. Even in this case, whether or not the driver carries the electronic key 8 depends on the electric field intensity when the radio waves from the electronic key 8 are received by the antennas 9a to 9e (mainly the outdoor side antennas 9a and 9b). Judgment based on the change of.

  The separation stage IV is also obtained from an image captured by a front recognition camera (stereo camera) 41 that is provided in the front part of the passenger compartment 31a and that includes a main camera 41a and a sub camera 41b that recognize the front of the host vehicle. Can do. Therefore, the front recognition camera 41 can also function as the driver detection device 27.

  Accordingly, the driver detection device 27 to be adopted is determined for each vehicle type because it differs depending on which of the stages I to IV the position information of the driver getting off is acquired.

  On the other hand, on the output side of the getting-off warning_ECU 6, a multi-information display (MID) 21 arranged on the instrument panel 25 and the like for displaying various information and an alarm driving unit 22 as alarm driving means are connected. . Furthermore, a directional sounding device 23 such as a directional speaker or a horn as an alarm output unit and an electric motor 23a are connected to the alarm driving unit 22.

  The directional sound device 23 notifies the driver of an alarm, and the sound pressure, frequency, and sound pattern of the alarm sound are variably set by a drive signal from the alarm drive unit 22. Further, the directional sounding device 23 is placed on the turntable 23b, and the rotation angle of the turntable 23b is controlled by an electric motor 23a that is rotated by a drive signal from the alarm drive unit 22.

  The directional sounding device 23 is set to sound an alarm sound toward the driver by the rotation of the turntable 23b. As described above, there are four timings for detecting the driver's getting-off, the initial stage I, the transient stage II, the getting-off stage III, and the separation stage IV, and at any stage or any combination of the stages, the electronic key Whether to detect the driver's getting off of 8 carrying is different for each vehicle type. Accordingly, the activation timing of the directional sounding device 23 and the electric motor 23a by the alarm driving unit 22 is set according to the stages I to IV for detecting the driver's getting off and is sounded toward the driver.

  By the way, when the push engine switch 10 is pressed (ON) while the select lever at the time of stopping is set to a range other than the P range, the electronic key _ECU 2 switches the power mode of the power unit 13 to the ACC mode. .

  When the power supply mode is switched to the ACC mode, the combination meter is turned off, so that the driver misunderstands that the power supply mode has been switched to the OFF mode, and the driver tends to get off and leave the vehicle 31 easily. In general, when a driver tries to get off by opening the driver's side door in such a state, a warning sound is emitted, but the driver is in the process of getting off and the prejudice that the power mode is OFF mode. In some cases, you may get off without noticing the warning sound. In particular, when the external environmental sound is loud, the alarm sound is easily erased.

  When the getting-off warning_ECU 6 detects that the driver carrying the electronic key 8 gets off when the power supply mode is in the ACC mode, the getting-off warning_ECU 6 alerts the driver with a warning. The warning notification executed by the getting-off warning_ECU 6 is specifically processed according to the getting-off warning processing routine shown in FIG.

  In this routine, first, it waits until the vehicle stops in step S1. In the present embodiment, whether or not the vehicle has stopped is based on signals from the brake switch 11 and the vehicle speed sensor 16, and a brake ON signal is output from the brake switch 11 and the vehicle speed detected by the vehicle speed sensor 16 is set in advance. It is determined that the vehicle has stopped when the vehicle speed is less than or equal to the vehicle stop determination vehicle speed (eg, 15 [Km / h]). And when it determines with a stop, it progresses to step S2, and when it determines with driving | running | working, a routine is exited. The process in step S1 corresponds to the stop detection means of the present invention.

  In step S2, the setting position of the select lever detected by the select position sensor 12 is detected, and it is checked whether or not the select lever is set to a range other than the P range. If the select lever is set to the P range, the routine is exited, and if it is set to a range other than the P range, the process proceeds to step S3. Note that the processing in step S2 corresponds to the position determination means of the present invention.

  In step S3, the power mode set by the electronic key _ECU2 is read to check whether the power mode is the ACC mode. If the power mode is the ACC mode, the process proceeds to step S4. If 10 is not pressed (ON) and the engine is running, the routine is exited. Note that the processing in step S3 corresponds to the power mode determination means of the present invention.

  In the electronic key_ECU2, when the push engine switch 10 is turned on in a state where the select lever at the time of stopping is set to a range other than the P range, the power mode is switched to the ACC mode. As a result, the engine is stopped, the battery power VBT is supplied only to specific electrical components, and the combination meter is turned off.

  Thereafter, when the process proceeds to step S4, it is checked whether or not the electronic key 8 has moved. Whether or not the electronic key 8 is moving is examined based on a change in electric field strength (reception electric field strength) of a signal from the electronic key 8 received by the indoor antennas 9d and 9e. For example, when the driver gets out of the vehicle, the electronic key 8 is not always carried, but the rear left and right doors 37a and 37b and the rear gate 38 are opened and the luggage is taken in and out. It is also possible to get off the vehicle temporarily in a state where it is left behind.

  If it is determined that the electronic key 8 is moved, that is, the driver carrying the electronic key 8 is moving from the driver seat 32, the process proceeds to step S5. If the movement of the electronic key 8 is not detected, Exit the routine as it is. In step S5, it is determined based on a signal from the getting-off detection device 20 whether or not the driver carrying the electronic key 8 gets off. The processing in this step corresponds to the getting-off detection means of the present invention.

  Examples of the getting-off detection device 20 include a driver seat belt switch, a contact sensor attached to an inner door knob of the driver seat door 35, a door switch of the driver seat door 35, and the like. Then, after the vehicle 31 stops, the driver seat belt switch is turned ON, or the contact sensor detects that the driver has contacted the inner door knob of the driver seat door 35, or the door switch of the driver seat door 35 When it is turned on, it is determined that the vehicle is getting off.

  If the driver does not get off, the routine exits. If the driver gets off, the process proceeds to step S6. In step S6, based on the information from the driver detection device 27, the position information (the distance and direction from the directional blowing device 23) of the driver getting off is acquired. There are four stages of getting the driver to get off, the initial stage I, the transition stage II, the getting off stage III, and the separation stage IV. In which stage the driver to recognize the getting off is different for each vehicle type, The driver detection device 27 to be adopted is also different in each stage I to IV.

  For example, in the initial stage I and the transition stage II, the driver detection device 27 employed when recognizing the driver getting off the vehicle uses a vehicle camera, a reflected wave sensor provided in the vehicle, or a radio wave from the electronic key 8 as an indoor antenna. For example, a change in electric field strength when received in 9d. The driver detection device 27 employed when recognizing the driver getting off at the getting-off stage III and the separation stage IV has a radio wave from the outside camera, the reflected wave sensor provided outside the car, or the electronic key 8 on the outdoor side. This is a change in electric field strength when received by the antennas 9a and 9b.

  In any one of the above-described stages I to IV, information from the adopted driver detection device 27 is read, and position information including a distance and a direction from the directional blowing device 23 to the driver is acquired. And it progresses to step S7, a warning display process is performed, and it progresses to step S8.

  This warning display process is executed according to a warning display processing subroutine shown in FIG. The processing in this subroutine corresponds to the warning display processing means of the present invention.

  In this subroutine, first, in step S21, a warning display (image, character, etc.) notifying that the power mode is the ACC mode, that is, forgetting to turn off the power, is output to MID 21, and the process proceeds to step S22.

  In step S22, the driver position information (distance and direction to the driver) obtained in step S6 described above is read, and in step S23, whether or not the driver is recognized based on the driver position information. Find out. If the driver is not recognized, the routine is directly exited and the process proceeds to step S8 in FIG.

  On the other hand, if the driver is recognized, the process proceeds to step S24, and the rotation angle signal indicating the direction of the driver is output from the getting-off warning_ECU 6 to the warning driving unit 22. Then, the alarm drive unit 22 outputs a drive signal corresponding to the rotation angle signal to the electric motor 23a, and the electric motor 23a rotates the turntable 23b so that the directional sounding device 23 placed thereon is changed to the driver. Set to the position (see FIG. 2).

  Thereafter, the process proceeds to step S25, and the sound pressure level, frequency, and sound of the alarm sound output from the directional sound device 23 are determined based on the distance between the directional sound device 23 and the driver, which is the position information of the driver. The sound pattern is set with reference to the sound pressure table shown in FIG. 7A, the frequency table shown in FIG. 7B, and the sound pattern table shown in FIG.

  Each table is divided into three stages of separation distances of L0 to L1, L1 to L2, and L2, and the sound pressure table is small so that the sound pressure level increases as the separation distance increases and reaches far away. , Medium and large, and the frequency table is set to low, medium and high in consideration of the fact that the frequency is attenuated as the distance increases.

  Furthermore, the sound pattern table is set to sound patterns 1 to 3 that emphasize urgency as the separation distance increases. That is, as shown in FIG. 4D, the sound pattern 1 is set to beep and beep intermittently according to the degree of urgency, and the sound pattern 2 is beep and beep at regular intervals. In addition, the sound pattern 3 is set to a continuous sound of beep. Note that the sound pressure level stored in the sound pressure table and the frequency stored in the frequency table differ depending on which stage I to IV the position of the driver to get off is detected.

  Thereafter, the process proceeds to step S26, where an alarm signal corresponding to the sound pressure level, frequency, and sound pattern set in step S25 is output to the alarm drive unit 22, and the process proceeds to step S8 of the disembarkation warning process routine. As a result, a driving signal corresponding to the warning signal is output from the warning driving unit 22 to the directional sounding device 23, and the power supply mode is forgotten to be turned off by the warning sound emitted from the directional sounding device 23 toward the driver. Warning.

  At that time, since the sound pressure, frequency, and sound pattern of the alarm sound output from the directional sounding device 23 are set according to the distance from the driver, the warning is given to the driver. Can be clearly noticed. In addition, since the directional sounding device 23 is directed to the driver, it is not necessary to warn at a high volume, and therefore, the driver is not discomforted, and noise damage is caused to the surroundings. Never give. The alarm sound may be variably set according to the separation distance at least one of the sound pressure level, frequency, and sound pattern.

  Then, the driver recognizes that the warning sound is emitted from the vehicle 31, returns to the vehicle 31, and confirms the display content of the MID 21, thereby recognizing that the power mode is forgotten to be turned off.

  When the process proceeds to step S8 in FIG. 3, an audio volume process is executed and the process proceeds to step S9. This audio volume processing is to prevent the alarm sound from being erased by the audio sound by lowering the volume of the audio device when the volume of the audio device is larger than the volume of the directional sounding device 23. This is executed according to the audio volume processing subroutine shown in FIG.

  In this subroutine, first, in step S31, the sound pressure [dB] of the warning sound emitted from the directional sounding device 23 set in the warning display processing subroutine described above is read, and in step S32, the audio_ECU 4 sets it. Read audio volume [dB]. In step S33, the sound pressure [dB] of the warning sound is compared with the audio volume [dB]. If alarm sound pressure ≦ audio volume, the process proceeds to step S34. If alarm sound pressure <audio volume, Then, the process proceeds to step S9 of the getting-off warning processing routine.

  When the process proceeds to step S34, the audio volume decrease [dB] is calculated based on the difference between the audio volume [dB] and the alarm sound pressure [dB].

Lowering width [dB] = k (Audio volume [dB]-Alarm sound pressure [dB])
Here, k is a coefficient, where k> 1.

  Thereafter, the process proceeds to step S35, and a command to decrease the audio volume [dB] by a reduction amount [dB] is transmitted to the audio_ECU 4, the audio volume is decreased, and the process proceeds to step S36.

  In step S36, it is checked whether or not the audio volume (volume) has been manually operated. If the audio volume has been manually operated, the process returns to step S33, and the sound pressure [dB] of the warning sound is compared with the audio volume [dB] again. To do. As a result, for example, even if a child or the like sitting in the passenger seat increases the audio volume, the warning sound is not erased by the audio sound because it is immediately reduced.

  On the other hand, if the audio volume is not manually operated, the process proceeds to step S9 of the getting-off warning processing routine.

  When the process proceeds to step S9 in FIG. 3, a warning stop condition is identified. The warning stop condition is determined to be satisfied when it is detected that the driver is seated on the driver seat 32. Whether the driver is seated on the driver's seat 32 is, for example, whether an ON signal is output from a seating sensor, or whether the driver is facing the steering wheel 26 with an in-vehicle camera or an in-vehicle reflected wave sensor. It is determined by identifying whether or not. Alternatively, it may be determined that the driver is seated on the driver's seat 32 when the electric field intensity received by the indoor antenna 9d provided in the center console 39 is equal to or greater than a predetermined value.

  If it is determined that the stop condition is satisfied, the process proceeds from step S10 to step S11. If the stop condition is not satisfied, the process returns to step S6 to continue the warning display process. In step S11, the warning display is stopped and the routine is exited. When the warning display is stopped, the warning display of the MID 21 and the blowing sound from the directional blowing device 23 are stopped.

  Further, when the electronic key_ECU2 determines that the select lever is set to a position other than the P range in the getting-off warning_ECU6 and the power mode is set to the ACC mode, the ACC → OFF processing routine shown in FIG. It is activated.

  In this routine, first, in step S41, the process waits until a parking brake switch (not shown) operates. When the driver operates the parking brake lever to turn on the parking brake switch, the program proceeds to step S42 and waits until the select lever is set to the P range.

  If it is determined from the detection signal of the select position sensor 12 that the select lever is set to the P range, the process proceeds to step S43 and waits until the push engine switch 10 is turned on.

  Thereafter, when the ON signal from the push engine switch 10 is detected, the process proceeds to step S44, the power mode is switched to the OFF mode, and the routine is terminated.

  Thus, in this embodiment, after the driver sets the select lever to a range other than the P range, the push engine switch 10 is pressed (ON) to stop the engine, and then the driver tries to get off the vehicle. Alternatively, when getting off, at least one of the sound pressure, frequency, and sound pattern of the alarm sound is variably set according to the separation distance between the driver and the directional sounding device 23. On the other hand, it is possible to accurately notify that the power mode is forgotten to be turned off.

  Further, since the warning sound from the directional sounding device 23 is sounded toward the driver, it is not necessary to warn at a high volume, and it does not give the driver uncomfortable feeling. On the other hand, there is no noise damage.

  Note that the present invention is not limited to the above-described embodiment. For example, the alarm sound output from the directional sounding device 23 is switched by operating the switch before the driver performs the operation of switching the power mode to the OFF mode. It may be possible to cancel.

1 ... In-vehicle control system,
2 ... Electronic key control unit,
3 ... Engine control unit,
4 ... Audio control unit,
6 ... Get off warning control unit,
7 ... In-car communication line,
8 ... Electronic key,
9: Communication circuit section,
9a, 9b ... outdoor side antenna,
9c: outdoor rear antenna,
9d, 9e ... indoor antenna,
10 ... push engine switch,
11 ... Brake switch,
12 ... Select position sensor,
13 ... Power supply unit,
14 ... Starter relay,
15 ... Starter motor,
16 ... Vehicle speed sensor,
19 ... Speaker,
20: Alighting detection device,
21 ... Multi-information display,
22 ... alarm drive unit,
23: Directional sounding device,
23a ... Electric motor,
23b ... turntable,
25 ... Instrument panel,
26 ... handle,
27 ... Driver detection device,
31 ... vehicle,
31a: Car cabin,
32 ... Driver seat,
33 ... Passenger seat,
34 ... Rear seat,
35 ... Driver's seat door,
36 ... Passenger door,
37a, 37b ... Rear left and right doors,
38 ... Rear gate,
39 ... Center console,
41. Front recognition camera,
41a ... main camera,
41b ... Sub camera,
I ... Early stage,
II ... Transient stage,
III ... Get off stage,
IV ... the separation stage,
VBT ... battery power

Claims (3)

Stop detection means for detecting stop of the vehicle;
Position determination means for determining whether or not the select lever is set to a range other than the parking range;
Power supply mode determination means for determining whether the power supply mode is an accessory mode;
Alighting detection means for detecting alighting of a user carrying the electronic key;
Position recognition means for recognizing the position of the user who detected getting off by the getting-off detection means;
An alarm driving means for driving an alarm output unit that emits an alarm sound; and
The stop detection unit detects the stop of the vehicle, the position determination unit determines that the select lever is set to a range other than a parking range, and the power mode determination unit determines that the power mode is an accessory mode. And when the getting-off detection means detects the user's getting-off, the alarm driving unit is driven and the alarm output unit is directed toward the user's position direction recognized by the position recognizing means. A vehicle drop warning device for an electronic key system for vehicles, comprising warning display processing means. The warning display processing means includes a position of the user recognized by the position recognition means, a sound pressure, a frequency, and a sound pattern of an alarm sound output from the alarm output unit according to a separation distance from the alarm output unit. The at least one of the following is variably set, and the getting-off warning device of the vehicle electronic key system according to claim 1, It further has a volume control means for controlling the audio volume,
The volume control means compares the alarm sound pressure output from the alarm output unit with the audio volume when the warning display processing means drives the alarm drive means, and if the audio volume is high, the audio volume The vehicle drop warning device for an electronic key system for a vehicle according to claim 1 or 2, wherein the audio volume is lowered according to a difference between the alarm sound pressure and the alarm sound pressure.

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