WO2018168204A1 - 車両用電子キー - Google Patents

車両用電子キー Download PDF

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Publication number
WO2018168204A1
WO2018168204A1 PCT/JP2018/001888 JP2018001888W WO2018168204A1 WO 2018168204 A1 WO2018168204 A1 WO 2018168204A1 JP 2018001888 W JP2018001888 W JP 2018001888W WO 2018168204 A1 WO2018168204 A1 WO 2018168204A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
key
vibration
control unit
electronic key
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/001888
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
隆司 光家
亘司 仲尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to DE112018001338.3T priority Critical patent/DE112018001338T5/de
Publication of WO2018168204A1 publication Critical patent/WO2018168204A1/ja
Priority to US16/509,672 priority patent/US11299912B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B19/00—Keys; Accessories therefor
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00571—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by interacting with a central unit
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0048—Circuits, feeding, monitoring
    • E05B2047/0071—Connecting lockparts by electronic communication means only, e.g. bus systems, time multiplexing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0094—Mechanical aspects of remotely controlled locks
    • E05B2047/0095—Mechanical aspects of locks controlled by telephone signals, e.g. by mobile phones
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00365—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit
    • G07C2009/0038—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks in combination with a wake-up circuit whereby the wake-up circuit is situated in the keyless data carrier
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G07C2009/00388—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks code verification carried out according to the challenge/response method
    • G07C2009/00404—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks code verification carried out according to the challenge/response method starting with prompting the lock
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00769—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means
    • G07C2009/00793—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by wireless means by Hertzian waves

Definitions

  • This disclosure relates to a vehicle electronic key.
  • the electronic key described in Patent Document 1 includes an acceleration sensor, and sets the response permission state based on the fact that the acceleration detected by the acceleration sensor is equal to or greater than a certain value.
  • the response permission state is a state where a response to a request signal transmitted from the in-vehicle device is permitted.
  • the electronic key transmits a response signal.
  • a state that is not in a response-permitted state is a response-inhibited state.
  • no response is made to the request signal.
  • the response is prohibited based on the continued state in which the acceleration exceeding a certain value is not detected. If the response is prohibited, power is reduced because no response is made to the request signal.
  • This disclosure aims to provide an electronic key for a vehicle that can further reduce power consumption.
  • the vehicle electronic key includes a receiving unit for receiving a request signal transmitted by an in-vehicle device mounted on the vehicle, a transmitting unit for transmitting a response signal in response to the request signal, A key control unit that determines whether or not the request signal has been received based on a signal from a reception unit, and that transmits the response signal from the transmission unit based on the determination that the request signal has been received; An acceleration sensor that detects an acceleration generated in the vehicle electronic key and sets a vibration detection flag based on the detected acceleration being determined to have detected a vibration greater than or equal to a threshold value is provided. The key control unit reads the vibration detection flag and sets a response permission state in response to the request signal based on the fact that the vibration detection flag is set.
  • the acceleration sensor sets the vibration detection flag based on the detection of the vibration exceeding the threshold value. Then, the key control unit reads the vibration detection flag, and sets the response permission state if the vibration detection flag is set.
  • the acceleration sensor does not need to notify the key control unit of the detected acceleration every time the acceleration is detected. As a result, the frequency of communication between the acceleration sensor and the key control unit can be reduced, so that power consumption can be reduced.
  • FIG. 1 is a configuration diagram of a vehicle electronic key system according to an embodiment.
  • FIG. 2 is a block diagram showing the configuration of the in-vehicle device in FIG.
  • FIG. 3 is a block diagram showing the configuration of the electronic key of FIG.
  • FIG. 4 is a flowchart showing a process related to the vibration detection flag executed by the sensor signal processing unit of FIG.
  • FIG. 5 is a flowchart showing processing relating to switching between the reception state and the sleep state executed by the key control unit of FIG.
  • FIG. 6 is a flowchart showing processing executed by the key control unit in place of FIG. 5 in the second embodiment.
  • FIG. 1 is a configuration diagram of a vehicle electronic key system according to an embodiment.
  • FIG. 2 is a block diagram showing the configuration of the in-vehicle device in FIG.
  • FIG. 3 is a block diagram showing the configuration of the electronic key of FIG.
  • FIG. 4 is a flowchart showing a process related to the vibration detection flag executed by the sensor signal processing
  • FIG. 7 is a flowchart showing processing executed by the sensor signal processing unit in place of FIG. 4 in the second embodiment.
  • FIG. 8 is a flowchart showing processing executed by the key control unit in place of FIG. 5 in the third embodiment.
  • FIG. 9 is a flowchart showing processing executed by the key control unit in addition to FIG. 8 in the fourth embodiment.
  • FIG. 10 is a flowchart showing processing executed by the key control unit in addition to FIGS. 8 and 9 in the fourth embodiment.
  • FIG. 1 is a configuration diagram of a vehicle electronic key system 1 including a vehicle electronic key (hereinafter simply referred to as an electronic key) 2 according to the present disclosure.
  • the vehicle electronic key system 1 includes an electronic key 2 and an in-vehicle device 3.
  • the electronic key 2 is carried by the user, and the in-vehicle device 3 is mounted on the vehicle 4.
  • the vehicle electronic key system 1 performs code verification by performing communication between the electronic key 2 and the vehicle-mounted device 3 without operating the electronic key 2, and based on the fact that the code verification is established, It is a system that permits the operation of.
  • the predetermined in-vehicle device is, for example, a door lock mechanism provided on the door of the vehicle 4.
  • the in-vehicle device 3 includes a communication unit 11, a verification ECU 12, an unlock sensor 13, a lock sensor 14, and a push start button 15.
  • the communication unit 11 includes an LF transmission unit 111, an outside antenna 112, an in-vehicle antenna 113, and an RF reception unit 114.
  • the LF transmission unit 111 modulates a signal such as a request signal with a carrier wave in the LF band (for example, 135 kHz) and transmits the modulated signal from the vehicle exterior antenna 112 or the vehicle interior antenna 113. Whether the signal is transmitted from the outside antenna 112 or the inside antenna 113 depends on what is the trigger of the signal to be transmitted. For example, the outside antenna 112 is used when the unlock sensor 13 or the lock sensor 14 detects a user operation, and the inside antenna 113 is used when the push start button 15 is operated.
  • the unlock sensor 13 is a sensor that is installed at or near the door handle of the vehicle 4 and is touched by the user when unlocking the door of the vehicle 4.
  • the lock sensor 14 is a sensor that is installed at or near the door handle of the vehicle 4 and is touched by the user when the door of the vehicle 4 is locked.
  • the push start button 15 is a button operated by the user when the drive source of the vehicle 4 is set to the drive state or the drive permission state, and is disposed in the compartment of the vehicle 4.
  • the drive source of the vehicle 4 is, for example, one or both of an engine and a motor.
  • the outside antenna 112 is provided in the door handle of the vehicle 4 and transmits radio waves to the outside of the vehicle 4.
  • the vehicle interior antenna 113 is provided in a vehicle interior or the like and transmits radio waves to the inside of the vehicle 4.
  • the range in which the request signal can be received is about 1 m around the vehicle 4.
  • the electronic key 2 receives the request signal, the electronic key 2 returns a response signal using radio waves in the RF band (for example, 315 MHz).
  • the RF receiver 114 receives and demodulates the signal transmitted by the electronic key 2.
  • the verification ECU 12 is a computer including a CPU, a ROM, a RAM, and the like, and the CPU executes a program stored in a non-transitional physical recording medium such as a ROM while using a temporary storage function of the RAM. . Thereby, collation ECU12 performs various control. Note that the execution of the program by the CPU means that a method corresponding to the program is executed. Further, some or all of the functions executed by the verification ECU 12 may be configured by hardware using one or a plurality of ICs.
  • the verification ECU 12 generates a signal to be transmitted to the electronic key 2.
  • This signal is, for example, a request signal for requesting a response from the electronic key 2. Then, the verification ECU 12 outputs the generated signal to the LF transmission unit 111.
  • the verification ECU 12 analyzes the signal demodulated by the RF receiver 114.
  • the demodulated signal is a signal transmitted by the electronic key 2 and the signal includes an ID code, and whether or not the ID code matches a regular ID code (That is, it is determined whether or not collation is established.
  • vehicle interior verification The verification using the signal transmitted from the electronic key 2 in response to the request signal transmitted from the in-vehicle antenna 113 is referred to as vehicle interior verification.
  • a request signal is transmitted from the vehicle exterior antenna 112, and verification using the signal transmitted from the electronic key 2 in response to the request signal is referred to as vehicle exterior verification.
  • vehicle exterior verification is sometimes referred to as vehicle exterior verification.
  • the in-vehicle device 3 periodically performs the vehicle exterior verification when the vehicle exterior verification condition is satisfied, and performs the vehicle interior verification when the vehicle interior verification condition is satisfied.
  • the vehicle verification condition is, for example, that the power is off and the door is locked. That the unlock sensor 13 is turned on and that the lock sensor 14 is turned on are also examples of outside-vehicle verification conditions.
  • the vehicle interior verification condition there is a condition that a predetermined operation possible when the driver is in the vehicle interior is performed.
  • This predetermined operation is, for example, a depression operation of a brake pedal.
  • the operation of the push start button 15 is also an example of a predetermined operation.
  • the collation ECU 12 is connected to the door lock ECU 5 and the power supply ECU 6.
  • the door lock ECU 5 detects whether the door locking mechanism of the vehicle 4 is in a locked state or an unlocked state. Further, the lock motor and the unlock motor included in the lock mechanism are driven to switch the lock mechanism from the locked state to the unlocked state, or from the unlocked state to the locked state.
  • the power supply ECU 6 transmits a start request signal to an ECU that controls a drive source such as an engine.
  • the verification ECU 12 When the outside verification performed based on the lock sensor 14 being turned on is established, the verification ECU 12 outputs a signal instructing the door lock ECU 5 to lock the door locking mechanism of the vehicle 4. When the vehicle interior verification executed based on the push start button 15 being pressed is established, the verification ECU 12 outputs a signal instructing the power source ECU 6 to start the drive source.
  • the electronic key 2 includes an LF receiver 21, an RF transmitter 22, a lock switch 23, an unlock switch 24, an acceleration sensor 25, and a key controller 26.
  • a door opening / closing switch, a mechanical key, or the like may be provided.
  • the LF receiving unit 21 is a configuration for demodulating the request signal transmitted from the in-vehicle device 3, receives the LF band radio wave, demodulates the radio wave, and extracts the request signal.
  • This LF receiver 21 corresponds to a receiver.
  • the RF transmitter 22 modulates a signal such as a request signal generated by the key controller 26 with an RF band carrier wave (for example, 315 MHz) and transmits the modulated signal.
  • This RF transmitter 22 corresponds to a transmitter.
  • the lock switch 23 and the unlock switch 24 are arranged on the surface of the electronic key 2 and can be pressed by the user.
  • the locking switch 23 is a switch that is pressed by the user when instructing to unlock the door lock of the vehicle 4.
  • the unlock switch 24 is a switch that the user presses when instructing to lock the door lock of the vehicle 4.
  • the acceleration sensor 25 includes a detection element unit 251, a sensor signal processing unit 252, and a memory 253.
  • the detection element unit 251 is an element that detects acceleration generated in the electronic key 2 in which the acceleration sensor 25 is built. This element is, for example, a capacitance detection type element that includes a sensor element movable portion and a fixed portion and detects a change in capacitance between them. In addition, an element that detects acceleration by other methods such as a piezoresistive method may be used. Although it is preferable that the detection element unit 251 can detect accelerations in three axial directions, the acceleration may be detected only in two or one axial directions.
  • the sensor signal processing unit 252 amplifies and adjusts the signal from the detection element unit 251, and outputs the acceleration detected by the detection element unit 251 as an electrical signal.
  • the sensor signal processing unit 252 is configured by, for example, an ASIC.
  • the memory 253 includes a flag storage area for storing a vibration detection flag, and functions as a flag storage unit.
  • the sensor signal processing unit 252 has a calculation function and operates by selectively switching between the notification mode and the flag mode.
  • the sensor signal processing unit 252 compares the preset threshold value with the acceleration detected by the detection element unit 251, and determines that a vibration equal to or greater than the threshold value has been detected. Is output to the key control unit 26.
  • the threshold value is determined for the purpose of detecting vibration generated in the electronic key 2 when the user carrying the electronic key 2 walks. Therefore, the threshold value is set to a value slightly smaller than the vibration generated in the electronic key 2 when the user carrying the electronic key 2 walks.
  • the sensor signal processing unit 252 compares the threshold value with the acceleration detected by the detection element unit 251, and sets the vibration detection flag when it is determined that the vibration exceeding the threshold value is detected.
  • the key control unit 26 is a computer including a CPU, a ROM, a RAM, and the like, and the CPU stores a program stored in a non-transitional physical recording medium such as a ROM while using a temporary storage function of the RAM. Execute. Thereby, the key control unit 26 performs various controls.
  • the execution of the program by the CPU means that a method corresponding to the program is executed. Further, some or all of the functions executed by the key control unit 26 may be configured by hardware using one or a plurality of ICs.
  • the key control unit 26 analyzes received data, for example. Specifically, the signal demodulated by the LF receiver 21 is analyzed to determine whether or not the signal is a request signal. In addition, the key control unit 26 generates a transmission signal and outputs the generated signal to the RF transmission unit 22.
  • the signal to be generated is, for example, a response signal that is transmitted in response to the request signal.
  • the response signal includes an ID code stored in advance.
  • the in-vehicle device 3 is in a state of periodically transmitting a request signal. In order to respond to this request signal, it is necessary to enter a reception standby state.
  • the reception standby state is a state in which a request signal can be received and a response signal responding to the request signal can be transmitted. That is, the reception standby state is a response permission state in which a response to the request signal is permitted.
  • the electronic key 2 can be in a sleep state. In the sleep state, the LF receiver 21 is not energized, so the power consumption is low. Further, in the sleep state, since it does not respond to the request signal, it is a response non-permission state in which a response to the request signal is not permitted.
  • the key control unit 26 determines whether vibration is detected based on a signal from the acceleration sensor 25. When it is determined that vibration has been detected, a reception standby state is set.
  • the vibration detection flag is set in the memory 253, and the key control unit 26 reads whether or not the vibration detection flag is set at a constant period.
  • FIG. 4 is a flowchart showing processing of the sensor signal processing unit 252 regarding setting and resetting of the vibration detection flag.
  • the sensor signal processing unit 252 periodically executes the process shown in FIG. 4 in the energized state.
  • step (hereinafter, step is omitted) S1 it is determined based on the signal output from the detection element unit 251 whether or not vibration above the threshold is detected. If this determination is NO, the process proceeds to S3.
  • a vibration detection flag is set. Setting the vibration detection flag here means setting the value of the vibration detection flag stored in the flag storage area of the memory 253 to 1.
  • S2 If S2 is executed or if the determination in S1 is NO, the process proceeds to S3.
  • S3 it is determined whether or not the vibration detection flag has been read by the key control unit 26 since the previous execution of S3.
  • the key control unit 26 In order for the key control unit 26 to read out the vibration detection flag, the key control unit 26 communicates with the sensor signal processing unit 252 and instructs to output the value of the vibration detection flag. Therefore, the sensor signal processing unit 252 can determine whether or not the vibration detection flag has been read.
  • the process proceeds to S4.
  • the vibration detection flag is reset, that is, 0, and the process of FIG. 4 ends.
  • the process of FIG. 4 is terminated without executing S4.
  • the process of FIG. 4 is executed again after the execution cycle of the process of FIG. 4 has elapsed. This execution cycle is assumed to be the same as the vibration detection cycle of the acceleration sensor 25, for example.
  • FIG. 5 is a flowchart showing a process related to switching between the reception standby state and the sleep state among the processes executed by the key control unit 26.
  • the key control unit 26 periodically executes the process shown in FIG. 5 in the energized state.
  • the flag reading cycle is set to a cycle longer than the execution cycle in which the sensor signal processing unit 252 executes the processing of FIG. Since this determination is performed in S11, the execution cycle in FIG. 5 is set to a cycle shorter than the flag read cycle.
  • the vibration detection flag is read by communicating with the sensor signal processing unit 252 of the acceleration sensor 25.
  • S13 it is determined whether or not vibration has occurred based on the vibration detection flag read in S12. Specifically, if the vibration detection flag is 1, it is determined that vibration has occurred, and if the vibration detection flag is 0, it is determined that vibration has not occurred.
  • a reception standby state is set. If it is a sleep state at the time of executing S14, it is switched to a reception standby state, and if it is in a reception standby state at the time of executing S14, the reception standby state is continued.
  • S15 a sleep state is set. If it is in the reception standby state at the time of executing S15, it is switched to the sleep state, and if it is in the sleep state at the time of executing S14, the sleep state is continued. When S14 or S15 is executed, the process of FIG. 5 is terminated.
  • the acceleration sensor 25 sets a vibration detection flag based on detecting vibration that is equal to or greater than a threshold value. And the key control part 26 reads a vibration detection flag periodically, and will set it as a reception standby state, ie, a response permission state, if the vibration detection flag is set. Therefore, the acceleration sensor 25 does not need to notify the key control unit 26 of the detected acceleration every time the acceleration is detected. As a result, the frequency of communication between the acceleration sensor 25 and the key control unit 26 can be reduced, so that power consumption can be reduced.
  • the sensor signal processing unit 252 of the acceleration sensor 25 can be executed by switching between the flag mode and the notification mode.
  • the flag mode is a mode in which a vibration detection flag is set in the memory 253 when vibration exceeding a threshold value is detected.
  • the notification mode is a mode for outputting, to the key control unit 26, a vibration detection signal indicating that a vibration greater than the threshold value has been detected without waiting for a request from the key control unit 26 when detecting vibrations exceeding the threshold value. .
  • FIG. 6 is a flowchart showing processing executed by the key control unit 26 of the electronic key 2 instead of FIG. 5, and FIG. 7 shows processing executed by the sensor signal processing unit 252 of the acceleration sensor 25 instead of FIG. It is a flowchart to show.
  • the second embodiment is different from the first embodiment in that the processes shown in FIGS.
  • the key control unit 26 repeatedly executes the process shown in FIG. 6 in the energized state. Note that the electronic key 2 is in a sleep state at the start of energization.
  • the electronic key 2 is in a sleep state. Thereafter, when S31 is to be executed, S38 is executed. Therefore, S31 is executed in the sleep state.
  • S31 it is determined whether or not there is a vibration notification from the acceleration sensor 25. This determination is made based on whether or not a vibration detection signal has been acquired. If the determination in S31 is NO, S31 is repeated. On the other hand, if judgment of S31 is YES, it will progress to S32.
  • S32 switch to the reception standby state.
  • the sensor signal processing unit 252 is instructed in the flag mode.
  • S34 to S38 are the same as S11 to S15 in FIG. Therefore, if it is determined in S34 that the flag read cycle has come, S35 is executed to read the vibration detection flag.
  • S36 it is determined whether or not vibration has occurred from the value of the vibration detection flag. If it is determined that vibration has occurred, a reception standby state is set in S37. When S37 is executed, the process returns to S34. Therefore, if it is determined that vibration has occurred, the reception standby state is continued.
  • the sensor signal processing unit 252 periodically executes the process illustrated in FIG. 7 in the energized state.
  • the execution cycle of FIG. 7 is the same as that of FIG. In S41, it is determined whether or not the flag mode is set. If it is the flag mode, the process proceeds to S46.
  • S42 it is determined whether or not the key control unit 26 has instructed switching to the flag mode. If judgment of S42 is NO, it will progress to S43. In S43, it is determined whether or not vibration greater than or equal to the threshold value has been detected. The process of S43 is the same as S1 of FIG. If judgment of S43 is YES, it will progress to S44.
  • a vibration detection signal is output to the key control unit 26 in order to notify the key control unit 26 that vibration has been detected.
  • S44 executes, the process returns to S42. If judgment of S43 is NO, it will return to S42, without performing S44. If judgment of S42 is YES, it will progress to S45. In S45, the mode is switched to the flag mode. Thereafter, the process proceeds to S46.
  • S46 to S49 are the same as S1 to S4 in FIG. Therefore, if it is determined in S46 that vibrations greater than or equal to the threshold value have been detected, a vibration detection flag is set in S47. If it is determined in S48 that the vibration detection flag has been read, the vibration detection flag is reset in S49. If S49 is executed or if the determination in S48 is NO, the process proceeds to S50.
  • S50 it is determined whether or not the key control unit 26 has instructed switching to the notification mode. If judgment of S50 is YES, it will progress to S51. In S51, the mode is switched to the notification mode. Then, the process of FIG. 7 is complete
  • the acceleration sensor 25 when the acceleration sensor 25 is in the notification mode, it outputs a vibration detection signal to the key control unit 26 when it detects vibration above the threshold.
  • the key control unit 26 acquires the vibration detection signal, the key control unit 26 enters a reception standby state (S32).
  • the electronic key 2 In the sleep state, it is not possible to respond to the request signal transmitted by the in-vehicle device 3. For this reason, if the electronic key 2 exists at a position where the request signal can be received, and if the electronic key 2 is in a state that should respond to the request signal but is in the sleep state, the response to the request signal is reduced. In order to suppress this decrease in responsiveness, the electronic key 2 shifts to a reception standby state when vibration is detected.
  • the vibration detection signal is a signal for setting the reception standby state, if it is already in the reception standby state, the key control unit 26 is not required to quickly acquire the vibration detection signal. Therefore, when the key control unit 26 enters the reception standby state, the key control unit 26 executes S33 and sets the acceleration sensor 25 in the flag mode.
  • the key control unit 26 sets the acceleration sensor 25 in the flag mode in a situation where it is less necessary to quickly grasp that the vibration exceeding the threshold value has occurred. The power consumption can be reduced while suppressing the decrease.
  • the key control unit 26 sets the acceleration sensor 25 to the notification mode.
  • the process shown in FIG. 8 is executed instead of the process shown in FIG. In FIG. 8, S61 to S67 execute the same processing as S31 to S37 of FIG. After executing S67, S68 is executed. In S68, the countdown timer is reset. This countdown timer is used to determine that the time during which no vibration is detected has continued for a certain period of time. Therefore, if it is determined in S66 that there is vibration, the countdown timer is reset to the initial value.
  • the initial value of the countdown timer is set to a time longer than the flag reading cycle, for example, several minutes. The initial value of the countdown timer corresponds to the minimum duration.
  • S69 it is determined whether or not the countdown timer has become zero. This determination is to determine whether or not the time during which the acceleration sensor 25 continues to detect no vibration above the threshold exceeds the minimum duration.
  • S70 and S71 are executed.
  • S70 and S71 are the same as S38 and S39 in FIG. 6, respectively.
  • the process shifts to the sleep state, and in S71, the sensor signal processing unit 252 is instructed in the notification mode.
  • the key control unit 26 even if the key control unit 26 reads the vibration detection flag and determines that no vibration has been detected, the key control unit 26 does not immediately instruct the acceleration sensor 25 to switch to the notification mode.
  • the key control unit 26 instructs the acceleration sensor 25 to switch to the notification mode when the time during which no vibration is detected continues for the time set as the initial value of the countdown timer.
  • the notification mode communication between the acceleration sensor 25 and the key control unit 26 is not performed unless vibration exceeding the threshold value occurs. Therefore, in a situation where there is a high possibility that vibration will not occur, power consumption can be reduced by using the notification mode. However, to the extent that no vibration has occurred during the flag read cycle, the user has temporarily stopped, and there is a high possibility that vibration will occur again.
  • the acceleration sensor 25 when the time during which no vibration is detected continues for the time set as the initial value of the countdown timer, the acceleration sensor 25 is instructed to switch to the notification mode. Thereby, the frequency
  • the fourth embodiment is an improvement of the third embodiment.
  • the key control unit 26 executes the processes shown in FIGS. 9 and 10 in addition to the processes shown in the third embodiment.
  • FIG. 9 is periodically executed in a state where it is determined that the electronic key 2 is outside the vehicle 4.
  • S81 it is determined whether or not the electronic key 2 has been brought into the passenger compartment of the vehicle 4. This determination itself is directly performed by the in-vehicle device 3, and the determination result is acquired from the in-vehicle device 3 by communication.
  • the in-vehicle device 3 determines whether or not the electronic key 2 has been brought into the passenger compartment of the vehicle 4. For example, after the vehicle exterior verification is established, the door of the vehicle 4 is opened, and then the door is closed. Next, when the vehicle interior verification is established, it is determined that the electronic key 2 has been brought into the vehicle interior of the vehicle 4. .
  • the process in FIG. 9 is terminated without executing S82.
  • the process proceeds to S82.
  • the initial value of the countdown timer is set to a value when the electronic key 2 is brought into the vehicle interior, hereinafter referred to as an initial value for the vehicle interior.
  • the initial value used when the electronic key 2 is outside the vehicle with respect to the initial value for the vehicle interior is the initial value for the vehicle exterior.
  • the initial value for vehicle interior is longer than the initial value for vehicle exterior. Specifically, for example, the initial value for the vehicle exterior is several minutes, whereas the initial value for the vehicle interior is several hours. The number of hours is an example, and the specific time can be appropriately changed.
  • the reason for increasing the initial value for the outside of the vehicle is to establish vehicle interior verification.
  • the in-vehicle device 3 performs vehicle interior verification when the vehicle interior verification condition is satisfied.
  • the vehicle interior verification is performed, if the electronic key 2 is present in the vehicle interior, the vehicle interior verification needs to be established. In order for the vehicle interior verification to be established, the electronic key 2 needs to be in a reception standby state.
  • the time in the reception standby state is from when the acceleration sensor 25 detects the vibration exceeding the threshold value until the countdown timer becomes zero.
  • the frequency at which the acceleration sensor 25 detects a vibration greater than the value while the electronic key 2 is brought into the passenger compartment is such that the user carries the electronic key 2 when the vehicle 4 travels on an uneven road surface. Less compared to the situation. Therefore, when it is determined that the electronic key 2 has been brought into the vehicle interior of the vehicle 4, the initial value of the countdown timer is set to the vehicle interior initial value that is longer than the vehicle exterior initial value.
  • FIG. 10 is executed instead of FIG. In S91, it is determined whether or not the electronic key 2 has been taken out of the vehicle 4. This determination is also made directly by the in-vehicle device 3, and the determination result is acquired from the in-vehicle device 3 by communication.
  • the in-vehicle device 3 determines whether or not the electronic key 2 has been taken out of the vehicle 4. For example, when the door of the vehicle 4 is opened in a situation where it is determined that the electronic key 2 is in the passenger compartment, it is determined that the electronic key 2 has been taken out of the vehicle 4.
  • the in-vehicle device 3 performs out-of-vehicle verification when there is a possibility that the electronic key 2 is taken out of the vehicle.
  • a condition for determining that the electronic key 2 has been taken out of the vehicle may be that the vehicle outside verification is established or that the vehicle outside verification is established after the opened door is closed.
  • the number of communications between the acceleration sensor 25 and the key control unit 26 can be reduced. In addition, it is possible to reduce the possibility that vehicle interior verification will not be established.
  • the acceleration sensor 25 outputs a vibration detection signal to the key control unit 26 when detecting a vibration equal to or greater than the threshold value.
  • the acceleration sensor 25 may sequentially output a signal indicating the magnitude of the detected acceleration to the key control unit 26 regardless of the magnitude of the detected acceleration.
  • each section is expressed as, for example, S1. Further, each section can be divided into a plurality of subsections, while a plurality of sections can be combined into one section. Further, each section configured in this manner can be referred to as a device, module, or means.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Lock And Its Accessories (AREA)
PCT/JP2018/001888 2017-03-15 2018-01-23 車両用電子キー Ceased WO2018168204A1 (ja)

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DE112018001338.3T DE112018001338T5 (de) 2017-03-15 2018-01-23 Elektronischer schlüssel für ein fahrzeug
US16/509,672 US11299912B2 (en) 2017-03-15 2019-07-12 Vehicle electronic key

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JP2017050298A JP6686943B2 (ja) 2017-03-15 2017-03-15 車両用電子キー
JP2017-050298 2017-03-15

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CN112324252A (zh) * 2020-11-16 2021-02-05 珠海格力电器股份有限公司 一种智能门锁报警的方法及装置

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IT202000019543A1 (it) * 2020-08-06 2022-02-06 Goffi Alberto Mario Sistema di controllo di accessi e/o presenze
JP7688492B2 (ja) 2021-01-29 2025-06-04 株式会社東海理化電機製作所 制御装置およびプログラム
US12139103B2 (en) * 2021-03-02 2024-11-12 Hyundai Mobis Co., Ltd. Smart key remote controller and low power operating method of the same

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JP5830365B2 (ja) * 2011-12-02 2015-12-09 株式会社東海理化電機製作所 電子キー及び電子キーシステム
DE102017201087B4 (de) * 2017-01-24 2019-08-14 Volkswagen Aktiengesellschaft Vorrichtung, Schlüsselgegenstelle und Verfahren zum Steuern von Betriebszuständen eines Schlüsselmoduls

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JP2005330651A (ja) * 2004-05-18 2005-12-02 Mitsubishi Motors Corp ドア解錠制御装置

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Publication number Priority date Publication date Assignee Title
CN109801419A (zh) * 2019-01-23 2019-05-24 四川虹美智能科技有限公司 一种无人售货机关门上锁的方法、装置及无人售卖机
CN112324252A (zh) * 2020-11-16 2021-02-05 珠海格力电器股份有限公司 一种智能门锁报警的方法及装置

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JP2018154967A (ja) 2018-10-04
US20190338562A1 (en) 2019-11-07
DE112018001338T5 (de) 2019-11-21
US11299912B2 (en) 2022-04-12

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