JP4348739B2 - Smart key system for vehicles - Google Patents

Description

  The present invention is a function that automatically locks and unlocks a door by wireless communication between a portable device, which is an electronic key, and an in-vehicle device, or enables engine start without using an actual key. The present invention relates to a smart key system for a vehicle that provides a smart function. In particular, it relates to the collation determination of smart functions.

  By performing wireless communication between the portable device (electronic key) possessed by the user and the vehicle control device (ECU), it is detected that the user possessing the portable device has approached the vehicle, and the door is locked. Recently, a smart key system that provides a function of automatically releasing or, conversely, detecting that the user has left the vehicle and automatically locking the door is being adopted in many vehicles. These functions provided by the smart key system are called smart functions.

  When a user who has a portable device approaches the vehicle, the portable device receives an inquiry signal from the ECU and transmits a response signal including a unique ID code to the ECU. The ECU determines whether the portable device is for the vehicle by checking the ID code included in the received response signal with the code recorded in its own memory, and the portable device is for the vehicle. If it is, a predetermined control process is performed.

  FIG. 9 and FIG. 10 are examples of verification mediation processing in a vehicle according to the prior art. As shown in FIG. 9, there are a request for periodic verification that occurs when the brake pedal is depressed and that that occurs when the door is opened and closed. And when the collation request | requirement at the time of brake-on and door opening / closing generate | occur | produces, each regular collation request | requirement is directly sent to the collation service execution part 41 contained in ECU, and the collation service execution part 41 is each from the time of each request | requirement. The periodic collation timing is managed, and collation is executed at the timing.

  FIG. 10 is an example of a timing chart of verification processing when a verification request is generated when the door is opened and closed and when the brake is turned on according to the prior art. When a collation request is generated when the door is opened and the door is opened and closed, a regular collation request is sent to the collation service execution unit 41, and regular collation is performed on the portable device 17, for example, at a cycle of 750 ms. Next, when the driver steps on the brake pedal, a collation request is generated when the brake is on, and a regular collation request is sent to the collation service execution unit 41, and regular collation is performed with respect to the portable device 17 by the vehicle interior transmitter 15 at a cycle of 750 ms, for example. To do.

  The collation service execution unit 41 manages the collation timing for each factor of the regular collation request, but does not perform the timing management as the entire regular collation request. Therefore, since the substantial timing of the in-vehicle periodic verification in the verification service execution unit 41 of the ECU is executed at intervals less than 750 ms, there is a problem in that the load of verification processing is increased.

  Depending on the execution timing of the periodic verification, the periodic verification at the time of brake on is performed even if the periodic verification at the time of door opening / closing is not completed, and the door is opened or closed before the periodic verification at the time of brake on is completed. It is also possible that the next start timing of the periodic collation will come and collation will not be performed normally. If this verification is not completed, the vehicle engine may not be started, and the driver continues to operate the push start switch 25 (see FIG. 1) for starting the engine without knowing why the engine does not start. It will fall.

  Furthermore, for example, the periodic verification at the time of brake opening is performed before the next periodic verification timing at the time of door opening / closing even though the verification result is held until the next periodic verification timing by the periodic verification at the time of door opening / closing. It is not an efficient collation to rewrite the collation result by executing.

  Against the background of the above circumstances, an object of the present invention is to provide a smart key system for a vehicle that has a small processing load and can perform regular collation processing reliably.

Means for Solving the Problems and Effects of the Invention

  This invention provides the smart key system for vehicles for solving the said subject. In other words, according to the first aspect, wireless communication is performed between the portable device in which the unique ID code for each vehicle is recorded and the vehicle-mounted device, and the vehicle-mounted device is within a predetermined distance range from the vehicle. In a smart key system for a vehicle that performs a predetermined control based on the collation result based on the generation of at least one trigger signal of a plurality of different types of trigger signals. Based on the assumption that periodic verification is repeated at regular intervals, periodic verification request accepting means that accepts at least one trigger signal of a plurality of trigger signals as a periodic verification request signal, and periodic verification request by a certain trigger signal After the periodical verification is accepted and accepted by the means, it is the same as the accepted periodical verification by another trigger signal in the middle of the cycle. When a periodical periodic verification is requested, the start timing of the periodic verification period by either the previous trigger signal or the subsequent trigger signal is shifted so that it matches the period of the periodic verification by the other trigger signal. A periodical collation request arbitration means for integrating a periodical collation request by a previous trigger signal and a periodical collation request by a subsequent trigger signal as one periodical collation request by matching each collation timing, and the periodical collation request arbitration A vehicle smart comprising: periodic verification execution means for receiving a command in accordance with arbitration of the means and executing periodic verification with a constant period regardless of whether a plurality of different trigger signals are randomly accepted Configured as a key system.

  In the present invention, when a periodic verification request by a plurality of triggers is generated, the periodic verification is integrated as a single periodic verification request. With the above configuration, even if a plurality of periodic verification requests having the same period occur, the periodic verification is always executed at regular intervals. Further, although the collation result is held until the next regular collation timing, the collation result is not rewritten unnecessarily by another regular collation request.

  7 and 8 show examples of the collation / arbitration processing in the vehicle according to the present invention. As shown in FIG. 7, in the case where a periodic verification is performed by a periodic verification request that occurs when, for example, a door is opened and closed, and a periodic verification request that occurs when the brake is turned on, In the arbitration unit 42, it is checked whether or not other regular collations are performed. If another regular collation is performed, the start timing of the period of the regular collation when the brake is turned on is set to the previously generated door. By shifting each matching timing so as to coincide with the periodic matching period generated when the door is opened and closed, they are integrated as one periodic matching request.

  Then, in response to the integrated periodic verification request sent from the in-vehicle periodic verification mediation unit 42, the verification service execution unit 41 generates a periodic verification period and start timing, and performs the periodic verification.

  FIG. 8 is an example of a timing chart of the periodic verification process in the configuration of FIG. When a verification request occurs when the door is opened and closed, the periodic verification request is sent to the in-vehicle periodic verification arbitration unit 42. In this case, since there is no other regular collation in the same cycle, the collation service execution unit 41 performs a regular collation with respect to the portable device 17 at a cycle of, for example, 750 ms. Next, when the driver depresses the brake pedal, a verification request is generated when the brake is turned on, and the periodic verification request is sent to the in-vehicle periodic verification arbitration unit 42. Then, the in-vehicle periodic verification mediation unit 42 integrates the verification cycle via the vehicle interior transmitter 15. That is, the periodic verification period when the brake is turned on is absorbed in the periodic verification period when the door is opened and closed.

  Since only one periodic verification request with the same cycle is sent from the in-vehicle periodic verification arbitration unit 42 to the verification service execution unit 41, the periodic verification timing in the ECU that is the smart ECU is maintained at a cycle of 750 ms. In other words, if it is the same cycle, the timing management of periodic verification, which was previously performed for each verification factor, can be unified regardless of the number of verification factors. It becomes possible to reduce.

  According to the second aspect of the present invention, the trigger signal for the periodic verification request in the smart key system for a vehicle according to the present invention is the door opening / closing operation when the driver's seat door of the vehicle is opened from the closed state or the door is closed from the opened state. And at least two signals, a brake-on signal when the vehicle brake is actuated, and the periodic verification request receiving means accepts a periodic verification request based on at least one of the door opening / closing signal and the brake-on signal. If the door opening / closing signal and the brake-on signal are received in succession in a pattern in which the matching timing of the fixed period is shifted, the matching request arbitration means determines the matching timing and brake-on signal of the periodic matching by the door opening / closing signal. The matching timing based on one of the signals is shifted so that the matching timing of the periodic matching by Thus, arbitration is performed so that the periodic verification request based on the door open / close signal and the periodic verification request based on the brake-on signal are integrated into one periodic verification request. Even if it is accepted at random, it is possible to adopt a configuration in which one periodic verification based on these signals is executed with a constant period.

  In the above-described configuration, a periodic verification request based on at least two signals of a door opening / closing signal and a brake-on signal is arbitrated as one request. Thereby, it becomes possible to synchronize the regular collation timing with respect to each request and to carry out the regular collation at regular intervals, thereby reducing the processing load of the regular collation. In addition, the periodic verification at the time of brake on is performed before the next periodic verification timing at the time of door opening / closing, even though the verification result is held until the next periodic verification timing by the periodic verification at the time of door opening / closing. Thus, the verification result is not rewritten.

  According to a third aspect of the present invention, the vehicle smart key system of the present invention includes vehicle power supply state detection means for detecting the power supply state of the vehicle, and changes from the vehicle power supply ON state to the OFF state as a trigger signal for the periodic verification request. It is also possible to adopt a configuration including a vehicle power-off signal when this is detected. With this configuration, arbitration can be performed even if a request other than the periodic verification request by the door open / close signal and the brake on signal is applied. Thereby, it becomes possible to synchronize the regular collation timing with respect to each request and to carry out the regular collation at regular intervals, thereby reducing the processing load of the regular collation.

  According to the fourth aspect of the present invention, the vehicle smart key system includes vehicle power-on means for turning on the vehicle, and when detecting that the vehicle power-on means is operated as a trigger signal for a periodic verification request. It is also possible to adopt a configuration including a vehicle power-on signal that is generated for a predetermined period. With this configuration, arbitration can be performed even if a request other than the periodic verification request by the door open / close signal and the brake on signal is applied. Thereby, it becomes possible to synchronize the regular collation timing with respect to each request and to carry out the regular collation at regular intervals, thereby reducing the processing load of the regular collation.

  The purpose of providing a smart key system for a vehicle that has a small processing load and that can perform regular collation processing reliably is to provide a regular periodical period by another trigger signal in the middle of the period after periodic collation is started. When a verification request is made, each verification is performed by shifting the start timing of the periodic verification cycle by either the previous trigger signal or the later trigger signal to match the periodic verification cycle by the other trigger signal. By matching the timing, the request for periodic verification by the previous trigger signal and the request for periodic verification by the subsequent trigger signal are integrated into one periodic verification request.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of a vehicle smart key system (hereinafter abbreviated as a smart key system) 1 of the present invention. As shown in FIG. 1, the smart key system 1 includes a smart ECU 3 mounted on a vehicle and a portable device 17 (also referred to as an electronic key 17) that the user should possess. Connected to the smart ECU 3 are a receiver 11, an in-vehicle transmitter 13, and an in-vehicle transmitter 15. The smart ECU 3 performs wireless communication with the portable device 17 via these transceivers. The transceiver includes known radio communication means such as an antenna and a modulation / demodulation circuit.

  The smart ECU 3 is a well-known CPU 31, ROM 32, RAM 33, flash memory that retains stored contents even when the power supplied to the smart ECU 3 is turned off, EEPROM (Electrically Erasable & Programmable Read Only Memory) A smart control program that includes a non-volatile memory 35 composed of a read-only memory) and an input / output circuit 34 that processes signals and data with devices connected to the smart ECU 3, and is stored in the ROM 32 or RAM 33 Various control processes are performed according to the data. Moreover, the collation service execution part 41 and the vehicle regular collation arbitration part 42 are comprised as a part of the above-mentioned smart control program.

  The smart ECU 3 receives signals from the touch sensor 5 built in the door handle of the vehicle, the key interlocking switch 7 built in the key cylinder of the door, and the trigger lock switch 9 via a switch circuit not shown. To be entered. The touch sensor 5 detects whether the user has put a hand on the door handle, for example, due to a change in capacitance, and is provided individually for each door handle. Note that the door includes a trunk door.

  The key interlocking switch 7 is a switch that is turned on in response to locking or unlocking the door using a mechanical key, and is built in a key cylinder provided in the door or the like. The trigger lock switch 9 is a lock-only switch, does not have a function of releasing the lock, and is provided, for example, near the handle portion of the door of the driver's seat or near the door handle. That is, the trigger lock is activated when it is detected that the portable device 17 is outside the vehicle compartment and there is no portable device 17 inside the vehicle compartment.

  The smart ECU 3 is configured to transmit signals to a door lock controller 21 that is a door lock ECU and a vehicle power supply controller 23 that is a power supply ECU. Specifically, the smart ECU 3 sends a signal to the door lock controller 21 indicating that the door of the vehicle is to be locked or unlocked. In response to this, the door lock controller 21 performs motor control for bringing the door into the locked state or the unlocked state. Control that automatically locks and unlocks the door is called a smart lock function.

  Further, a signal indicating that the engine can be started by a predetermined switch operation is transmitted to the vehicle power supply controller 23 without using a mechanical key. That is, the driver who has the portable device 17 can start the engine without inserting a mechanical key only by operating the push start switch 25 provided near the steering wheel. Such a function is called a smart ignition function.

  The portable device 17 is configured as a portable wireless device that can transmit and receive data to and from the smart ECU 3. In addition, the portable device 17 includes a wireless switch 19. The wireless switch 19 is used to lock or unlock the door by the user operating this switch. That is, the smart key system 1 performs wireless door control for bringing the door into a locked or unlocked state separately from the control for providing the smart function. In this embodiment, the smart controller for the smart function and the wireless controller for the wireless door control are used in the smart ECU 3 from the viewpoint of reducing the component cost. However, the smart controller and the wireless controller are separately used. You may make it comprise with ECU.

  As shown in FIG. 2, the out-of-vehicle transmitter 13 is provided in a driver's seat (D seat), a passenger seat (P seat), doors for getting on and off the left and right rear seats, and a trunk opening / closing door of the vehicle. Yes. In many cases, the vehicle interior transmitter 13 is built in a handle part of the door, and periodically transmits a first inquiry signal around the transmitter. The output of the first inquiry signal is adjusted so as to reach only within a range of about 70 cm to 1 m (first key response area SA) from the door. Therefore, only the portable device 17 existing in the first key response area SA can receive the first inquiry signal. The portable device 17 that has received the first inquiry signal transmits the ID code recorded in the memory to the receiver 11 as a response signal. These operations are called outside-vehicle verification.

  The vehicle interior transmitter 15 is built in, for example, a room lamp at the center of the room, and periodically transmits a second inquiry signal into the vehicle interior. The output of the second inquiry signal is adjusted so as to reach only a predetermined range (second key response area TA) in the passenger compartment. Therefore, only the portable device 17 existing in the second key response area TA (in short, in the vehicle) can receive the second inquiry signal. The portable device 17 that has received the second inquiry signal transmits the ID code recorded in the memory to the receiver 11 as a response signal. These operations are called in-vehicle verification.

  The receiver 11 is incorporated in, for example, a room mirror in front of the driver's seat, receives a response signal transmitted in response to a question signal from the portable device 17 in the key response areas SA and TA, and receives the portable device 17. Decode the unique ID code. Of course, the response signal includes data that makes it possible to identify whether the portable device 17 is present in the first response area SA or the second response area TA.

  The door state detection sensor 22 is constituted by, for example, a switch and is connected to a door lock controller, and detects a door open state (switch: on state) and a closed state (switch: off state).

  The brake switch 27 is constituted by a switch, for example, and detects an on state when the driver depresses the brake pedal, and detects an off state when the driver releases the brake pedal.

  The push start switch 25 is configured as a momentary switch, for example, and is turned on when the push start switch 25 is pressed and turned off when released. When the push start switch 25 is kept pressed for a predetermined time, the CPU determines that the push start switch 25 has been operated.

(Regular verification mediation process 1)
With reference to the flowcharts of FIGS. 3 and 4, a description will be given of the periodic verification arbitration process executed in the in-vehicle periodic verification arbitration unit 42 when the driver steps on the brake pedal and a verification request occurs when the brake is turned on. . The regular collation arbitration process is included in the smart control program and is periodically executed along with other processes.

  The periodic collation arbitration process is executed, for example, at a cycle of 50 ms in the main routine of the smart control program, for example. The processing cycle is generated by a timer interrupt function included in the CPU 31. That is, assuming that the timer interrupt period is 1 ms, the 50 ms period generation counter that secures an area in the RAM 33 by timer interrupt processing executed every 1 ms is incremented, and when the value reaches 50, an area is secured in the RAM 33. Set the periodic verification mediation processing execution flag. At this time, the 50 ms period generation counter is cleared to zero.

  In the main routine, the contents of the regular collation arbitration process execution flag are constantly monitored, and the regular collation arbitration process is performed when the regular collation arbitration process execution flag is set.

  A collation cycle counter that generates a period of regular collation is incremented when at least one of the below-described regular collation execution request flags is in an on state in a regular collation process executed, for example, at a period of 50 ms. When the periodic verification is executed at a cycle of 750 ms, the periodic verification execution timing is when the verification cycle counter value becomes 15. When the regular collation execution timing is reached, the collation period counter is cleared to zero.

  The periodic verification request when the brake is turned on is generated at a constant cycle (for example, 750 ms) by a verification cycle counter that starts counting when the brake pedal 27 is depressed to detect the ON state of the brake switch 27. When the release of the brake switch 27 is detected and the OFF state of the brake switch 27 is detected, the periodic verification request is not generated.

  In FIG. 3, when the driver steps on the brake pedal and the brake switch 27 is turned on, a periodic verification request is generated. That is, the brake-on periodic collation execution request flag for ensuring a storage area in the RAM 33 or the nonvolatile memory 35 is turned on. Note that a storage area is secured in the RAM 33 or the non-volatile memory 35 for each occurrence factor for the periodic verification execution request flag. Then, it is checked whether or not the periodical collation with the same period as the collation at the time of brake-on has already been performed due to other factors. When the regular collation is performed, a regular collation execution state flag that secures a storage area in the RAM 33 or the nonvolatile memory 35 is on. Therefore, it can be determined from the state of the periodic collation execution state flag whether or not the regular collation is performed.

  If the periodical verification execution status flag is on (S1: Yes), the periodical verification is performed due to other factors (door opening / closing, etc.), so the process ends without doing anything to avoid duplicate requests. To do. On the other hand, when the regular collation due to other factors is not performed (S1: No), the collation period counter that generates the period of the regular collation (for example, 750 ms) is started and the regular collation is started (S2). . Thereafter, for example, a regular check is performed every 750 ms period.

  In FIG. 4, when the driver removes his foot from the brake pedal and the brake switch 27 is turned off, the periodic verification request is not generated, and the brake-on periodic verification is performed in which the storage area is secured in the RAM 33 or the nonvolatile memory 35. The request flag is turned off. At this time, if a periodic verification request due to other factors such as door opening / closing occurs, that is, if at least one of the periodic verification execution request flags for each factor is on (S11: Yes), the period counter is operated. The process is terminated with the process left. That is, the periodic verification is continued. On the other hand, when the periodic collation due to other factors does not occur (S11: No), the operation of the collation cycle counter is stopped, the collation cycle counter value is cleared to zero, the regular collation execution status flag is cleared and the regular collation is performed. The process ends (S12).

  In the above example, when a collation request is generated when the brake is turned on, if a regular collation with the same period as the collation when the brake is on is performed, priority is given to the regular collation performed previously by other factors. However, a method of giving priority to the last periodic check may be used. That is, when the driver depresses the brake pedal and the brake switch 27 is turned on and a periodic verification request is generated, the verification cycle counter is once cleared to zero regardless of whether or not the periodic verification is caused by other factors. And periodic verification is started.

  And when a driver | operator removes | releases a foot from a brake pedal and the brake switch 27 will be in an OFF state, the process of above-mentioned step S11-S12 is performed.

(Regular verification mediation process 2)
With reference to the flowcharts of FIGS. 5 and 6, a description will be given of the periodic verification mediation processing executed in the in-vehicle periodic verification arbitration unit 42 when a periodic verification request is generated when the door is opened and closed and the door is opened and closed. Note that this periodic collation arbitration process is also included in the smart control program, and is periodically executed along with other processes. Note that the configuration of the processing timing and the like of the periodic collation arbitration process is the same as that of the above-described regular collation arbitration process 1, and therefore detailed description thereof is omitted.

  The periodic verification request at the time of opening and closing the door is a verification cycle counter that starts counting when the door state detection sensor 22 detects a change from the open state of the door to the closed state or a change from the closed state of the door to the open state. Due to this, it occurs at a constant period (for example, 750 ms) during a certain time (for example, 30 seconds).

  In FIG. 5, when the door state detection sensor 22 detects a change from the open state of the door to the closed state or a change of the door from the closed state to the open state, a periodic verification request is generated. That is, the door opening / closing periodic verification execution request flag that secures a storage area in the RAM 33 or the nonvolatile memory 35 is turned on. Then, it is checked whether or not the periodic verification has already been performed.

  If the periodic verification execution status flag is on (S31: Yes), the periodic verification is performed due to other factors (brake-on, etc.), so the process ends without doing anything to avoid duplicating requests. To do. On the other hand, when the regular collation due to other factors is not performed (S31: No), the collation cycle counter starts counting and the regular collation is started (S32). Thereafter, for example, a regular check is performed every 750 ms period.

  In FIG. 6, a periodic verification request that occurs after a predetermined time (for example, 30 seconds) from the point in time when a change from the open state of the door to the closed state or a change from the closed state of the door to the open state is detected does not occur. Alternatively, the door opening / closing periodic verification execution request flag for ensuring the storage area in the nonvolatile memory 35 is turned off. At this time, if a periodic verification request due to other factors such as brake-on occurs, that is, if at least one of the periodic verification execution request flags for each factor is on (S41: Yes), the verification cycle counter is set. The process ends with the operation being continued. That is, the periodic verification is continued. On the other hand, when the periodic collation due to other factors does not occur (S41: No), the operation of the collation cycle counter is stopped, the collation cycle counter value is cleared to zero, the regular collation execution status flag is cleared and the regular collation is performed. The process ends (S42).

  In the above example, when a change request from the door open state to the closed state or from the door closed state to the open state is detected and a verification request is generated when the door is opened / closed, When the periodic collation is performed, priority is given to the periodical collation that has been executed previously, but a method of prioritizing the last periodic collation may be taken. In other words, when a periodic verification request occurs when the door is opened and closed, the verification cycle counter is once cleared to zero and then the periodic verification is started regardless of whether or not the periodic verification due to other factors has occurred.

  When a predetermined time (for example, 30 seconds) has elapsed from the time when the change from the open state to the closed state of the door or the change from the closed state to the open state of the door is detected, the processes of steps S41 to S42 described above are performed. Do.

  When the smart ECU 3 captures the vehicle power supply state signal from the vehicle power supply controller 23 and detects that the vehicle power supply has changed from the on state to the off state, a predetermined time (for example, 30 seconds) using the detected time as a trigger, Periodic verification may be performed. Also in this case, the periodic collation arbitration process is performed as shown in the flowcharts of FIGS. Since the configuration of the periodic collation arbitration process is the same as described above, a detailed description is omitted.

  Even when a key is not found in the room when an operation for turning on the vehicle power is performed by pushing the push start switch 25 which is a vehicle power on means, the time when the push start switch 25 is pushed is used as a trigger for a predetermined time (for example, 30 (In seconds), there may be periodic verification. Also in this case, the periodic collation arbitration process is performed as shown in the flowcharts of FIGS. Since the configuration of the periodic collation arbitration process is the same as described above, a detailed description is omitted.

  Although the embodiments of the present invention have been described above, these are merely examples, and the present invention is not limited to these embodiments, and the knowledge of those skilled in the art can be used without departing from the spirit of the claims. Various modifications based on this are possible.

The figure which shows the structure of the smart key system of a vehicle. The schematic diagram which shows a radio | wireless communication area. The flowchart which shows the structure of a periodical collation mediation process (periodic collation mediation process 1). The flowchart which shows the structure of the periodic collation mediation processing following FIG. 3 (periodic collation mediation processing 1). The flowchart which shows the structure of a periodical collation mediation process (periodic collation mediation process 2). The flowchart which shows the structure of the periodic collation mediation processing following FIG. 5 (periodic collation mediation processing 2). The figure which shows the structure of the periodic collation mediation process of this invention. The timing chart explaining the regular collation mediation processing of this invention. The figure which shows the structure of the regular collation process of a prior art. The timing chart explaining the regular collation process of a prior art.

Explanation of symbols

1 Smart Key System for Vehicle 3 Smart ECU (Periodic verification request acceptance means, periodic verification request arbitration means, periodic verification execution means)
11 Receiver (Periodic verification execution means)
13 Out-of-vehicle transmitter (periodic verification execution means)
15 Car interior transmitter (periodic verification execution means)
17 Mobile device (Periodic verification execution means)
22 door state detection switch 23 vehicle power supply controller (vehicle power supply state detection means)
25 Push start switch (vehicle power on means)
27 Brake switch 33 RAM
35 Non-volatile memory 41 Verification service execution unit 42 In-vehicle periodic verification mediation unit

Claims (4)

Wireless communication is performed between the portable device in which the unique ID code for each vehicle is recorded and the in-vehicle device, and whether the in-vehicle device is within the predetermined distance range from the vehicle. In the vehicle smart key system that collates with the ID code and performs predetermined control based on the collation result,
A periodic verification request is made for at least one trigger signal of the plurality of trigger signals, on the assumption that periodic verification is performed by repeating the verification at a constant period based on generation of at least one trigger signal of a plurality of different types of trigger signals. Periodic verification request acceptance means to accept as a signal,
After a periodic verification request by a certain trigger signal is accepted by the periodic verification receiving means and the periodic verification is started, a periodic verification of the same period as the accepted periodic verification by another trigger signal is performed in the middle of the cycle. When a request is made, the start timing of the periodic verification period by either the previous trigger signal or the subsequent trigger signal is shifted so that it matches the periodic verification period by the other trigger signal, and each verification timing is By combining, the periodic verification request arbitration means for integrating the periodic verification request by the previous trigger signal and the periodic verification request by the subsequent trigger signal as one periodic verification request;
Receiving a command in accordance with the arbitration of the periodic collation request arbitration means, and having a regular collation executing means for executing the periodic collation while maintaining a constant period regardless of whether a plurality of different trigger signals are randomly accepted. A smart key system for vehicles. The trigger signal for the periodic verification request includes at least a door opening / closing signal when the driver's door of the vehicle is opened from the closed state or when the door is closed from the opened state, and a brake on signal when the vehicle brake is activated. Two,
The periodic verification request receiving means accepts a periodic verification request by at least one of the door opening / closing signal and the brake on signal,
The periodic verification request arbitration means, when the door opening / closing signal and the brake-on signal are received in succession in a pattern in which the constant period verification timing is shifted, the verification timing of the periodic verification by the door opening / closing signal, By shifting the verification timing based on one of the signals so that the verification timing of the periodic verification by the brake-on signal matches, the periodic verification request by the door open / close signal and the periodic verification request by the brake-on signal are combined into one periodic verification. Mediate to integrate as a request,
The periodic verification execution means executes one periodic verification based on these signals with a constant period, regardless of whether the door opening / closing signal and the brake-on signal are randomly received in succession. The smart key system for vehicles according to claim 1 which is. Vehicle power supply state detection means for detecting the state of the power supply of the vehicle,
The vehicle smart key system according to claim 2, wherein the trigger signal for the periodic verification request includes a vehicle power-off signal when it is detected that the vehicle power is changed from an on state to an off state. Vehicle power on means for turning on the vehicle,
The vehicle power-on signal generated for a predetermined period when the power-on means is operated and a key is not found in the room is included as the periodic verification request trigger signal. Smart key system for vehicles.

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