WO2019058996A1 - Système de communication pour véhicule, dispositif monté sur un véhicule, procédé de commande de véhicule et programme informatique - Google Patents

Système de communication pour véhicule, dispositif monté sur un véhicule, procédé de commande de véhicule et programme informatique Download PDF

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Publication number
WO2019058996A1
WO2019058996A1 PCT/JP2018/033174 JP2018033174W WO2019058996A1 WO 2019058996 A1 WO2019058996 A1 WO 2019058996A1 JP 2018033174 W JP2018033174 W JP 2018033174W WO 2019058996 A1 WO2019058996 A1 WO 2019058996A1
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WIPO (PCT)
Prior art keywords
vehicle
antenna
portable device
received
received signal
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PCT/JP2018/033174
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English (en)
Japanese (ja)
Inventor
亮太 吉田
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2019058996A1 publication Critical patent/WO2019058996A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B49/00—Electric permutation locks; Circuits therefor ; Mechanical aspects of electronic locks; Mechanical keys therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Definitions

  • the present invention relates to a communication system for a vehicle, an in-vehicle apparatus, a vehicle control method, and a computer program.
  • This application claims the priority based on Japanese Patent Application No. 2017-181795 filed on Sep. 21, 2017, and incorporates all the contents described in the aforementioned Japanese application.
  • the driver's seat side received signal strength Hd when the electronic key receives a radio wave from the driver's seat antenna, and the passenger's seat side reception signal when the electronic key receives a radio wave from the passenger seat antenna In an XY orthogonal coordinate system in which the strength Hp is taken as the X-axis and the Y-axis, respectively, a determination line L which is constructed from a plurality of linear equations and which becomes a reference when determining the electronic key position is determined. Then, the communication terminal position determination that determines the position of the electronic key based on which position the coordinate point P determined from the driver's seat side received signal strength Hd and the passenger seat side received signal strength Hp is relative to the determination line L An apparatus is disclosed.
  • a vehicular communication system includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas.
  • the on-vehicle apparatus includes: a storage unit storing a threshold table of an intensity threshold according to the received signal intensity that can be received from the portable apparatus; an antenna received from the portable apparatus; The inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength relating to the antenna and the intensity threshold, and based on the determination result of the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
  • An on-vehicle apparatus is an on-vehicle apparatus that transmits signals into and out of a vehicle compartment via a plurality of antennas and receives received signal strengths of signals transmitted from the respective antennas from a portable device.
  • a storage unit storing a threshold table of an intensity threshold according to received signal strengths that can be received from the portable device; received signal strengths for one antenna and another antenna received from the portable device; and the intensity threshold
  • an output control unit for outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination unit that determines whether the portable device is inside or outside the vehicle based on the determination result
  • an on-vehicle device transmits a signal to the inside or outside of a vehicle compartment via a plurality of antennas, and receives an received signal strength of a signal transmitted from each antenna from a portable device.
  • a vehicle control method for controlling, based on a threshold table of an intensity threshold according to received signal strength that can be received from the portable device, and received signal strength for one antenna and another antenna received from the portable device A step of outputting a signal for unlocking the vehicle door based on the determination result of the inside / outside determination step of determining whether the portable device is in the vehicle compartment or outside the vehicle compartment; Including.
  • a computer program receives from a portable device received signal strengths for signals transmitted from a plurality of antennas, and a threshold table of strength thresholds according to received signal strengths that can be received from the portable device; Whether the portable device is inside or outside the vehicle is determined based on the received signal strength of one antenna and the other antenna received from the portable device, and based on the result of the determination, The computer is caused to execute a process of outputting a signal for unlocking the vehicle door.
  • the present invention can not only be realized as a vehicular communication system provided with such a characteristic processing unit, but can be realized as a method having such characteristic processing as a step, or such a step is executed on a computer. It can be realized as a computer program for Further, the present invention can be realized as a semiconductor integrated circuit that realizes part or all of a vehicular communication system, or can be realized as another system including a vehicular communication system.
  • FIG. 1 is a schematic view showing one configuration example of a vehicular communication system according to a first embodiment.
  • FIG. 1 is a block diagram showing an exemplary configuration of a portable device according to Embodiment 1.
  • FIG. 1 is a block diagram showing an exemplary configuration of an on-vehicle apparatus according to a first embodiment.
  • FIG. 6 is a conceptual diagram showing a threshold value table stored in a storage unit according to the first embodiment.
  • FIG. 2 is a functional block diagram showing a main part configuration of a control unit according to the first embodiment. It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 1 performs vehicle control. It is a schematic diagram which shows one structural example of the communication system for vehicles which concerns on Embodiment 2.
  • FIG. 7 is a block diagram showing an example of a configuration of an on-vehicle apparatus according to a second embodiment.
  • FIG. 7 is a functional block diagram showing a main configuration of a control unit according to a second embodiment. It is a flowchart which shows one processing example when the communication system for vehicles which concerns on Embodiment 2 performs vehicle control.
  • the location of the portable device can be determined with high accuracy while being simple, and vehicle control can be performed more accurately.
  • a vehicular communication system includes an on-vehicle device that transmits signals into and out of a vehicle compartment via a plurality of antennas, and a portable device that transmits received signal strengths of signals transmitted from the respective antennas.
  • a vehicle communication system including: a storage unit storing a threshold table of an intensity threshold according to received signal strength that can be received from the portable device; and the onboard device received from the portable device The determination result of the inside / outside determination unit which determines whether the portable device is inside or outside the vehicle based on the received signal strength of the antenna and the other antenna and the strength threshold value, and the inside / outside determination unit And an output control unit that outputs a signal for unlocking the vehicle door.
  • the inside / outside determination unit of the in-vehicle device may include received signal strengths of one antenna and another antenna received from the portable device, and the strength threshold. Based on the determination of the location of whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle, the output control unit releases the vehicle door. Output a lock signal. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the vehicular communication system is characterized in that the plurality of antennas are three or more, and the storage unit stores the threshold table for each combination of at least two antennas; A determination unit that determines the one antenna and the other antenna when a specific signal is received, and a table selection unit that selects one of the threshold tables based on the determination result of the determination unit; Equipped with
  • the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit.
  • the table selection unit selects one of the plurality of threshold value tables stored in the storage unit. Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
  • the determination unit performs the determination based on a transmission source of the specific signal.
  • the determination unit when the determination unit makes such a determination, the determination is made based on the transmission source of the received specific signal. Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
  • the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna. In this case, it is determined that the portable device is in the vehicle compartment.
  • the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table.
  • the inside / outside determination unit determines that the portable device is in the vehicle compartment. Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
  • the value of the received signal strength of the one antenna is an integer.
  • the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
  • the on-vehicle apparatus is an on-vehicle apparatus that transmits signals into and out of the vehicle compartment via a plurality of antennas, and receives received signal strength of the signals transmitted from each antenna from the portable device.
  • a signal for unlocking the vehicle door is output based on the determination result of the inside / outside determination unit that determines whether the portable device is in the vehicle interior or the outside based on the threshold value and the inside / outside determination unit.
  • an output control unit is an on-vehicle apparatus that transmits signals into and out of the vehicle compartment via a plurality of antennas, and receives received signal strength of the signals transmitted from each antenna from the portable device.
  • the inside / outside determination unit of the on-vehicle apparatus is based on the received signal strengths for the one antenna and the other antennas received from the portable apparatus, and the strength threshold.
  • the output control unit unlocks the vehicle door when it is determined whether the portable device is inside or outside the vehicle, for example, when it is determined that the portable device is outside the vehicle. Output a signal. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the plurality of antennas is three or more
  • the storage unit stores the threshold table for each combination of at least two antennas, and a specific signal is received
  • a table selection unit that selects one of the threshold tables based on the determination result of the determination unit.
  • the determination unit determines the one antenna and the other antenna, and based on the determination result of the determination unit,
  • the table selection unit selects one of the plurality of threshold value tables stored in the storage unit. Therefore, since the one antenna, the other antenna, and the most suitable one as the threshold table can be selected, the accuracy in determining the location of the portable device can be enhanced.
  • the determination unit performs the determination based on a transmission source of the specific signal.
  • the determination unit when the determination unit makes the determination, the determination is performed based on the transmission source of the received specific signal. Therefore, for example, by determining one antenna and another antenna close to the transmission source of the received specific signal, the accuracy in determining the location of the portable device can be further enhanced.
  • the inside / outside determination unit determines that the received signal strength of the other antenna is equal to or greater than a strength threshold corresponding to the received signal strength of the one antenna. It is determined that the portable device is in the vehicle compartment.
  • the portable device is used when the received signal strength of the other antenna is equal to or higher than the strength threshold corresponding to the received signal strength of the one antenna of the threshold table.
  • the inside / outside determination unit determines that the vehicle is in the vehicle compartment. Therefore, since the location of the portable device can be determined only by comparing the intensity threshold of the threshold table with the received signal intensity of the other antenna, the location of the portable device can be determined easily and quickly. I can do it.
  • the value of the received signal strength of the one antenna is an integer.
  • the value of the received signal strength of the one antenna is an integer. That is, the variable in the process of determining the location of the portable device is an int type. Therefore, the processing load can be reduced compared to the case of double type.
  • a vehicle control method transmits a signal to and from a cabin through a plurality of antennas, and receives from a portable device the received signal strength of the signal transmitted from each antenna.
  • step is a vehicle control method for controlling a vehicle, and the threshold table of the intensity threshold according to the received signal strength that can be received from the portable device, and the received signal strength for one antenna and other antennas received from the portable device.
  • the portable device is selected based on the received signal strengths of the one antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the passenger compartment or outside the passenger compartment. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • the computer program receives from the portable device the received signal strength for signals transmitted from a plurality of antennas, and the threshold of the strength threshold according to the received signal strength that can be received from the portable device. Based on the table and the received signal strength for one antenna and another antenna received from the portable device, it is determined whether the portable device is inside or outside the vehicle, and the result of the determination is Based on the control, the computer is caused to execute processing for outputting a signal for unlocking the vehicle door.
  • the portable device is based on the received signal strengths of the antenna and the other antenna received from the portable device and the intensity threshold of the threshold table. A determination is made as to whether the vehicle is in the vehicle interior or outside the vehicle exterior. For example, when it is determined that the portable device is outside the vehicle, a signal for unlocking the vehicle door is output. Therefore, the location of the portable device can be determined easily and quickly as compared with the case of using a complicated determination formula, and the location of the portable device can be determined more accurately than when the approximate equation is used. be able to.
  • FIG. 1 is a schematic view showing one configuration example of a vehicular communication system 100 according to the first embodiment.
  • the vehicular communication system 100 according to the first embodiment includes an on-vehicle device 1 that transmits and receives various signals using two transmitting antennas 3 and receiving antennas 4 provided on a vehicle C, and a mobile that transmits and receives signals to and from the on-vehicle devices 1. And the machine 2.
  • the two transmit antennas 3 include a first transmit antenna 31 and a second transmit antenna 32.
  • the first transmission antenna 31 is provided on a pillar on the driver's seat side
  • the second transmission antenna 32 is provided on a pillar on the passenger's seat side.
  • the first transmitting antenna 31 and the second transmitting antenna 32 transmit signals to the portable device 2.
  • the first transmission antenna 31 and the second transmission antenna 32 may be abbreviated as transmission antennas 31 and 32.
  • the receiving antenna 4 is provided at the center of the rear seat. For example, they are provided under the seat in the center of the rear seat, at appropriate places such as the backrest.
  • the right side in the traveling direction of the vehicle C is the driver's seat side
  • the left side in the traveling direction is the passenger side.
  • the receiving antenna 4 receives a response signal described later from the portable device 2.
  • a plurality of vehicle door request switches 5 are provided on the outer surface. Specifically, a first vehicle door request switch 51 is provided on the door handle outside the driver's seat, and a second vehicle door request switch 52 is provided on the door handle outside the passenger seat.
  • Each vehicle door request switch 5 is configured of, for example, a push-down switch for locking or unlocking a door provided with the vehicle door request switch, a contact sensor for detecting a user's hand touching the door handle, or the like.
  • Each vehicle door request switch 5 may be separate from the structure for locking the door provided with it and the structure for unlocking.
  • the in-vehicle device 1 wirelessly transmits a signal for determining the position of the portable device 2 via the transmission antennas 31 and 32.
  • the portable device 2 receives the signals transmitted from the transmitting antennas 31 and 32, and measures the received signal strength of the received signals.
  • the portable device 2 wirelessly transmits a response signal including the measured received signal strength to the in-vehicle device 1 in response to the signal transmitted by the in-vehicle device 1.
  • the in-vehicle device 1 receives the response signal transmitted from the portable device 2, determines the position where the portable device 2 is located based on the received signal strength included in the received response signal, and performs predetermined processing according to the determination result Run. For example, the in-vehicle device 1 executes processing such as locking or unlocking of the vehicle door, engine start, warning of missing locking of the vehicle door, and the like.
  • FIG. 2 is a block diagram showing one configuration example of the portable device 2 according to the first embodiment.
  • the portable device 2 is provided with a receiving unit 23, a signal strength measuring unit 23b, a switch 23c, a transmitting unit 22, a storage unit 24, and the like.
  • the portable device 2 further includes a control unit 21.
  • the control unit 21 controls the operation of each component described above.
  • the control unit 21 is a microcomputer having, for example, one or more central processing units (CPU), a multi-core CPU, a read only memory (ROM), a random access memory (RAM), an input / output interface, a timer, and the like.
  • the CPU of the control unit 21 is connected to the transmission unit 22 and the reception unit 23 via an input / output interface.
  • the storage unit 24 is a non-volatile memory such as an EEPROM (Electrically Erasable Programmable ROM) or a flash memory.
  • the storage unit 24 stores a control program for the control unit 21 to determine whether the portable device 2 is outside the vehicle or inside the vehicle.
  • the control unit 21 controls the operation of each component by executing the control program stored in the storage unit 24 and is necessary for determining whether the portable device 2 is outside the vehicle or inside the vehicle.
  • Various processes for transmitting information to the on-vehicle device 1 are executed.
  • the storage unit 24 also stores a portable device identifier for identifying the portable device 2. Although the control unit 21 and the storage unit 24 are illustrated as separate components in FIG. 2, the storage unit 24 may be provided inside the control unit 21.
  • the receiving unit 23 is connected to a three-axis antenna 23a in which three coils are oriented in directions orthogonal to each other via a switch 23c.
  • the receiving unit 23 receives the wireless signal transmitted from the on-vehicle device 1 through the three-axis antenna 23 a and the switch 23 c.
  • the three radio signals received by the three-axis antenna 23a are input to the switch 23c.
  • the switch 23 c selects one radio signal in accordance with the control of the control unit 21.
  • the receiving unit 23 is a circuit that removes the component of the carrier wave from the radio signal selected by the switch 23 c to extract a reception signal, and outputs the extracted reception signal to the control unit 21.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • the portable device 2 also includes a signal strength measurement unit 23b.
  • the 3-axis antenna 23a receives a wireless signal transmitted from the in-vehicle device 1, and the signal strength measurement unit 23b measures the received signal strength of the wireless signal selected by the switch 23c, and controls the measured received signal strength Output to 21
  • the control unit 21 selects each of the three wireless signals from the three-axis antenna 23a in accordance with the timing at which the wireless signal for signal strength measurement is transmitted from the in-vehicle device 1, and receives the received signal strength of the selected wireless signal. It measures by the intensity
  • the control unit 21 combines the components of the measured received signal strength to perform vector calculation, and calculates the received signal strength in the amplitude direction of the wireless signal transmitted from the on-vehicle device 1. Therefore, the control unit 21 can obtain a constant received signal strength regardless of the orientation or the attitude of the portable device 2 with respect to the vehicle C.
  • the one calculated by vector calculation is referred to as received signal strength.
  • the control unit 21 calculates the received signal strength of each signal received through the three-axis antenna 23a is transmitted from the portable device 2 to the in-vehicle device 1,
  • the control unit 11 may calculate the received signal strength. It is sufficient that the on-vehicle device 1 can acquire the reception signal strength when the portable device 2 receives the signal transmitted from the transmission antennas 31 and 32.
  • the transmission unit 22 is a circuit that modulates a response signal or the like input by the control unit 21 using a carrier wave, and wirelessly transmits the signal via the transmission antenna 22a.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • FIG. 3 is a block diagram showing an example of the configuration of the on-vehicle device 1 according to the first embodiment.
  • the in-vehicle apparatus 1 includes an in-vehicle reception unit 12, an in-vehicle transmission unit 13, a storage unit 14, and the like.
  • the in-vehicle device 1 further includes a control unit 11, and controls the operation of each component described above.
  • the control unit 11 is a microcomputer having, for example, one or more CPUs, a multi-core CPU, a ROM, a RAM, an input / output interface, a timer, and the like.
  • the control unit 11 is connected to the on-vehicle reception unit 12, the on-vehicle transmission unit 13, and the storage unit 14 via an input / output interface.
  • the control unit 11 controls the operation of each component by executing a control program 10a described later stored in the storage unit 14, and determines whether the portable device 2 is outside the vehicle or inside the vehicle, The predetermined process according to the said determination is performed.
  • the storage unit 14 is a non-volatile memory similar to the storage unit 24.
  • the storage unit 14 stores a control program 10 a for executing determination of the location of the portable device 2 by the control unit 11 controlling the operation of each component of the in-vehicle device 1.
  • the storage unit 14 stores a threshold value table in which the intensity value of each of the received signal intensities that can be received from the portable device 2 is associated with a predetermined intensity threshold. Details of the threshold value table will be described later.
  • the control unit 11 and the storage unit 14 are illustrated as separate components in FIG. 3, the storage unit 14 may be provided inside the control unit 11. Further, the threshold value table may be stored in the storage unit 14 by being described in the control program 10a.
  • the control program 10a according to the first embodiment may be recorded on the recording medium 10 in a computer readable manner.
  • the storage unit 14 stores the control program 10 a read from the recording medium 10 by a reading device (not shown).
  • the recording medium 10 is an optical disc such as a CD (Compact Disc) -ROM, a DVD (Digital Versatile Disc) -ROM, a BD (Blu-ray (registered trademark) Disc), a flexible disc, a magnetic disc such as a hard disc, a magnetic optical disc, a semiconductor memory Etc.
  • the control program 10a according to the first embodiment may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 14.
  • control program 10a compares the received signal strengths of the transmitting antenna 31 and the transmitting antenna 32 received from the portable device 2 with the intensity value and the intensity threshold to determine whether the portable device 2 is in the vehicle compartment
  • a computer program may be included that makes it possible to determine whether the vehicle is out of the room and to output at least a signal for unlocking the vehicle door based on the result of the determination.
  • a receiving antenna 4 is connected to the in-vehicle receiving unit 12.
  • the on-vehicle receiving unit 12 receives a response signal and the like transmitted by wireless from the portable device 2 through the receiving antenna 4.
  • the on-vehicle receiving unit 12 is a circuit that removes the component of the carrier wave from the received response signal or the like to extract the received signal, and outputs the extracted received signal to the control unit 11.
  • a carrier wave an Ultra High Frequency band (UHF band) of 300 MHz to 3 GHz is used, but it is not limited to this frequency band.
  • the on-vehicle transmission unit 13 is a circuit that modulates a signal output from the control unit 11 into a radio signal using a carrier wave, and transmits the radio signal from the transmission antennas 31 and 32 to the portable device 2.
  • a low frequency band (LF band) of 30 kHz to 300 MHz is used as a carrier wave, it is not limited to this frequency band.
  • the in-vehicle device 1 further includes a switch 13a.
  • the radio signal modulated as described above is transmitted from the one transmission antenna 3 selected by the switch 13 a to the portable device 2 according to the control of the control unit 11.
  • the in-vehicle device 1 configured as described above sequentially transmits such signals from the first transmitting antenna 31 and the second transmitting antenna 32 so that the portable device 2 can identify the transmitting antenna 3 to which the signal has been transmitted.
  • a request signal according to the operation state of the vehicle door request switch 5 is input to the control unit 11 of the in-vehicle device 1.
  • the control unit 11 can recognize the operation state of the vehicle door request switch 5 based on the input request signal. Further, the control unit 11 may directly acquire a request signal corresponding to the operation of the vehicle door request switch 5, or may acquire it via a door ECU (Electronic Control Unit), another ECU or the like.
  • a door ECU Electronic Control Unit
  • FIG. 4 is a conceptual diagram showing the threshold value table stored in the storage unit 14 according to the first embodiment.
  • the strength value and the strength threshold associated with the strength value in the threshold table are obtained based on a determination formula that serves as a reference in determining whether the portable device 2 is inside or outside the vehicle.
  • the determination equation is a binary value using a two-dimensional vector consisting of two received signal strengths when the portable device 2 receives the signals transmitted from the first transmitting antenna 31 and the second transmitting antenna 32, respectively. Obtained by the classifier.
  • the classifier is, for example, a support vector machine (nonlinear SVM (Support Vector Machine)) that performs non-linear identification, various neural network models, and the like.
  • the received signal strength of one antenna is mapped by mapping the determination formula with the received signal strength of one of the transmitting antennas 31 and 32 and the received signal strength of the other as the X axis and the Y axis, respectively. And the received signal strength of the other antenna are associated in a one-to-one manner.
  • the intensity associated with each of the received signal intensities that the in-vehicle device 1 can receive from the portable device 2 The value can be any integer in the range of integers from 0 to 511.
  • the received signal strength of one antenna is in the integer range of 0 to 511, it is possible to specify the received signal strength of the other antenna as a reference for the vehicle interior and the vehicle exterior.
  • the threshold value table received signal strengths (intensity threshold) for the other antenna specified according to each intensity value related to the reception signal strength for one antenna from 0 to 511 and each intensity value Is associated with.
  • one intensity value and an intensity threshold value associated therewith become the boundary between the interior of the vehicle and the exterior of the vehicle when determining the location of the portable device 2.
  • FIG. 5 is a functional block diagram showing the main configuration of the control unit 11 according to the first embodiment.
  • the control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, and the like.
  • the CPU 111 controls the above-described components by loading a control program stored in advance in the ROM or the storage unit 14 onto the RAM and executing the control program.
  • the inside / outside determination unit 112 compares the received signal strengths of the transmitting antennas 31 and 32 received from the portable device 2 with the intensity value and the intensity threshold of the threshold table to determine whether the portable device 2 is in the vehicle compartment Determine if it is outside the room.
  • the inside / outside determination unit 112 compares the received signal strengths of the transmission antennas 31 and 32 received from the portable device 2 with the strength value and the strength threshold of the threshold table, respectively.
  • the reception signal strengths of the transmission antennas 31 and 32 received from the portable device 2 will also be referred to as the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32, respectively.
  • the inside / outside determination unit 112 reads, from the threshold value table, an intensity threshold value corresponding to an intensity value corresponding to the measurement reception signal intensity of the first transmission antenna 31 (one antenna). The inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal strength of the second transmission antenna 32 (another antenna). When the strength threshold is greater than the measured reception signal strength of the second transmission antenna 32, the inside / outside determination unit 112 determines that the portable device 2 is outside the vehicle, and the strength threshold is smaller than the measurement reception signal strength of the second transmission antenna 32. In this case, it is determined that the portable device 2 is in the vehicle compartment.
  • the in-vehicle device 1 is not limited to this.
  • the inside / outside determination unit 112 uses the value corresponding to the measured reception signal strength of the second transmission antenna 32 as the strength value, reads the corresponding strength threshold from the threshold table, and compares it with the measurement reception signal strength of the first transmission antenna 31. It is good. In this case, it is necessary to replace the intensity value in the threshold table with the threshold intensity.
  • the storage unit 14 may store in advance another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced.
  • Output control unit 113 outputs a vehicle door control signal for controlling unlocking or locking of the vehicle door to a door ECU not shown according to the operation of vehicle door request switch 5 and the determination result of inside / outside determination unit 112. Do.
  • the door ECU locks or unlocks the vehicle door in accordance with the vehicle door control signal from the output control unit 113.
  • FIG. 6 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the first embodiment performs vehicle control.
  • the inside / outside determination unit 112 reads the intensity threshold corresponding to the intensity value corresponding to the measured reception signal strength of the first transmission antenna 31 from the threshold table, and the measurement reception signal of the second transmission antenna 32 The case of comparison with the intensity will be described as an example.
  • the CPU 111 of the control unit 11 determines whether a request signal has been input (step S101).
  • a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
  • step S101: NO the determination is repeated until it is determined that the request signal is input. If the CPU 111 determines that the request signal is input (step S101: YES), the CPU 111 acquires the measurement reception signal strength of the first transmission antenna 31 and the measurement reception signal strength of the second transmission antenna 32 (step S102).
  • the measurement reception signal strength may be received from the portable device 2 in response to the input of the request signal. Alternatively, the measurement reception signal strength may be periodically acquired, the acquired measurement reception signal strength may be stored in the storage unit 14, and the latest one may be used.
  • the inside / outside determination unit 112 reads an intensity threshold value corresponding to the intensity value corresponding to the measured reception signal intensity of the first transmission antenna 31 from the threshold value table of the storage unit 14 (step S103).
  • the inside / outside determination unit 112 compares the read intensity threshold with the measured reception signal intensity of the second transmission antenna 32. That is, the inside / outside determination unit 112 determines whether the measured reception signal strength of the second transmission antenna 32 is equal to or greater than the read strength threshold (step S104).
  • step S104 determines that the measured reception signal strength of the second transmission antenna 32 is not greater than or equal to the read strength threshold (step S104: NO), that is, the strength threshold is higher than the measured reception signal strength of the second transmission antenna 32.
  • the strength threshold is higher than the measured reception signal strength of the second transmission antenna 32.
  • the output control unit 113 outputs a vehicle door control signal for unlocking the vehicle door to a door ECU (not shown).
  • the door ECU unlocks the vehicle door according to the vehicle door control signal from the output control unit 113 (step S106).
  • step S104 determines that the portable device 2 is in the vehicle compartment.
  • step S105 the vehicle door is not unlocked.
  • the location of the portable device 2 is determined based on the threshold value table.
  • the intensity value (and the intensity threshold) in the threshold table is an integer. Therefore, compared with the case where the determination of the location of the portable device 2 is performed using a continuous (double type) determination formula using a non-linear SVM or the like, the processing load on the control unit 11 can be reduced and faster processing is possible. It is. Furthermore, the amount of memory required to determine the location of the portable device 2 can be greatly reduced.
  • FIG. 7 is a schematic view showing one configuration example of the vehicle communication system 100 according to the second embodiment
  • FIG. 8 is a block diagram showing one configuration example of the in-vehicle apparatus 1 according to the second embodiment.
  • the vehicular communication system 100 according to the second embodiment has a configuration substantially similar to that of the first embodiment. However, in the vehicle communication system 100 according to the second embodiment, the three transmission antennas 3 are provided in the vehicle C, and this point is different from the first embodiment.
  • the vehicle C according to the second embodiment is provided with a first transmission antenna 31, a second transmission antenna 32, and a third transmission antenna 33.
  • the first transmitting antenna 31 and the second transmitting antenna 32 have already been described, and the detailed description will be omitted.
  • the third transmission antenna 33 is provided at the center of the vehicle interior of the vehicle C.
  • the third transmission antenna 33 is an appropriate place such as an armrest or a console box provided between the driver's seat and the passenger seat.
  • Provided in The third transmission antenna 33 is not limited to the above-described example as long as it is provided at the center of the vehicle interior.
  • one of the three transmitting antennas 31 to 33 is one transmitting antenna 3 selected by the switch 13 a according to the control of the control unit 11.
  • the wireless signal is transmitted to the portable device 2 via Such radio signals are sequentially transmitted from the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 so that the portable device 2 can identify the transmission antenna 3 to which the signal has been transmitted.
  • the storage unit 14 stores a plurality of threshold tables.
  • the storage unit 14 stores a threshold value table for each combination of at least two transmission antennas 3. That is, in the second embodiment, since there are three transmitting antennas 31 to 33, at least three threshold tables are stored.
  • the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32.
  • a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32.
  • the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the second transmission antenna 32 (for example, the first transmission antenna 31) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
  • the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths related to the first transmission antenna 31 and the third transmission antenna 33, respectively.
  • the intensity value according to the measurement reception signal strength of one of the first transmission antenna 31 and the third transmission antenna 33 (for example, the first transmission antenna 31) and the measurement of the third transmission antenna 33 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength. Furthermore, the storage unit 14 stores a threshold value table based on a determination formula using a two-dimensional vector consisting of measured reception signal strengths of the third transmission antenna 33 and the second transmission antenna 32.
  • the intensity value according to the measurement reception signal strength of one of the third transmission antenna 33 and the second transmission antenna 32 (for example, the third transmission antenna 33) and the measurement of the second transmission antenna 32 It is associated with a strength threshold used when determining the location of the portable device 2 based on the received signal strength.
  • the storage unit 14 may further store another threshold value table in which the intensity value and the threshold value intensity in the threshold value table are replaced. That is, a threshold table having an intensity value and an intensity threshold relating to the measured reception signal strength of the other one (second transmission antenna 32) of the first transmission antenna 31 and the second transmission antenna 32, the first transmission antenna 31 and A threshold value table having an intensity value and an intensity threshold value related to the measured reception signal strength of the other one (for example, the third transmission antenna 33) of the third transmission antenna 33, the third transmission antenna 33 and the second transmission antenna 32 Among these, the storage unit 14 may further store a threshold value table having an intensity value and an intensity threshold value related to the measured reception signal intensity of the other one (for example, the second transmission antenna 32).
  • FIG. 9 is a functional block diagram showing the main configuration of the control unit 11 according to the second embodiment.
  • the control unit 11 includes a CPU 111, an inside / outside determination unit 112, an output control unit 113, a determination unit 114, a table selection unit 115, and the like.
  • the CPU 111, the inside / outside determination unit 112, and the output control unit 113 have already been described, and the detailed description will be omitted.
  • the determination unit 114 determines two transmission antennas among the first transmission antenna 31, the second transmission antenna 32, and the third transmission antenna 33 when the specific signal is received. Specifically, one transmission antenna according to the strength value in the threshold value table and another transmission antenna according to the threshold strength are determined.
  • the specific signal is, for example, a vehicle door control signal for controlling the unlocking or locking of the vehicle door, an engine start control signal for controlling the start of the engine, or the like.
  • the determination unit 114 performs based on the transmission source of the received specific signal. For example, when the specific signal is a vehicle door control signal, the determination unit 114 determines whether the vehicle door control signal is transmitted from the first vehicle door request switch 51 or the second vehicle door request switch 52. Determine the three transmit antennas 3.
  • the determination unit 114 determines two transmission antennas 3 closest to the transmission source of the received specific signal. For example, when the transmission source of the received vehicle door control signal is the first vehicle door request switch 51, that is, when the user touches the first vehicle door request switch 51 on the driver's side of the vehicle C, the determination unit A step 114 determines the first transmitting antenna 31 and the third transmitting antenna 33 which are closest to the first vehicle door request switch 51.
  • the table selection unit 115 selects one of the plurality of threshold value tables stored in the storage unit 14 based on the determination result of the determination unit 114. That is, the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the two transmission antennas 3 determined by the determination unit 114. For example, when the determination unit 114 determines the first transmission antenna 31 and the second transmission antenna 32, the table selection unit 115 determines the two-dimensional configuration of measured reception signal strengths of the first transmission antenna 31 and the second transmission antenna 32, respectively. A threshold table is selected based on a decision formula using a vector.
  • FIG. 10 is a flowchart illustrating an example of processing when the vehicular communication system 100 according to the second embodiment performs vehicle control.
  • the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33. I will list and explain.
  • the CPU 111 of the control unit 11 determines whether a request signal is input (step S201).
  • a request signal is, for example, a signal relating to a request for locking or unlocking the vehicle door.
  • step S201: NO the determination is repeated until it is determined that the request signal is input.
  • the CPU 111 determines that the request signal is input (step S201: YES). At this time, the determination unit 114 determines the first transmission antenna 31 and the third transmission antenna 33 closest to the first vehicle door request switch 51 (step S202).
  • the table selection unit 115 selects the threshold value table based on the determination formula using the two-dimensional vector consisting of the measurement reception signal strengths of the first transmission antenna 31 and the third transmission antenna 33 determined by the determination unit 114. (Step S203).
  • steps S204 to S208 are the same as the processes of steps S102 to S106 of FIG. 6, and thus the detailed description will be omitted.
  • the location of the portable device 2 based on the measured reception signal strengths of the two transmission antennas 3 closest to the transmission source of the received specific signal. make a judgment on Therefore, since the determination of the location of the portable device 2 is performed using the received signal strength of the transmitting antenna 3 close to the user (portable device 2), the accuracy in the determination can be enhanced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Selective Calling Equipment (AREA)

Abstract

Selon la présente invention, sur la base d'intensités de signal de réception pour une antenne et une autre antenne situées sur un véhicule, des intensités de signal de réception reçues en provenance d'un dispositif portable, et des valeurs de seuil d'intensité d'une table de seuil ayant des valeurs de seuil d'intensité en fonction des intensités de signal de réception qui peuvent être reçues en provenance du dispositif portable, une détermination est réalisée pour savoir si le dispositif portable est dans le compartiment de véhicule ou à l'extérieur du compartiment de véhicule. Par exemple, lorsqu'il est déterminé que le dispositif portable se trouve à l'extérieur du compartiment de véhicule, un signal pour déverrouiller une portière de véhicule est fourni.
PCT/JP2018/033174 2017-09-21 2018-09-07 Système de communication pour véhicule, dispositif monté sur un véhicule, procédé de commande de véhicule et programme informatique WO2019058996A1 (fr)

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JP2017181795A JP2019056248A (ja) 2017-09-21 2017-09-21 車両用通信システム、車載機、車両制御方法及びコンピュータプログラム
JP2017-181795 2017-09-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114650109A (zh) * 2020-12-18 2022-06-21 威马智慧出行科技(上海)股份有限公司 进入车辆方向检测方法、系统及车辆

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5619223B1 (ja) * 2013-07-04 2014-11-05 三菱電機株式会社 無線通信システム
JP5812820B2 (ja) * 2011-11-24 2015-11-17 ダイハツ工業株式会社 キーフリーシステム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5812820B2 (ja) * 2011-11-24 2015-11-17 ダイハツ工業株式会社 キーフリーシステム
JP5619223B1 (ja) * 2013-07-04 2014-11-05 三菱電機株式会社 無線通信システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114650109A (zh) * 2020-12-18 2022-06-21 威马智慧出行科技(上海)股份有限公司 进入车辆方向检测方法、系统及车辆

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