JP4354316B2 - Door lock control system - Google Patents

Description

  The present invention detects the position of a portable device with a vibration detection function by a main unit (on-vehicle device), automatically locks the door when the owner of the portable device leaves the vehicle, and automatically unlocks the door when approaching the vehicle. More specifically, in addition to power saving, the door lock control system that prevents the in-vehicle device from being trapped in the vehicle and eliminates or reduces unnecessary repeated lock / unlock operations. About the system.

  Controls the locking and unlocking of the door of a car (vehicle) depending on whether or not the receiving unit connected to the door lock mechanism of the car can receive a signal periodically output by a portable transmitter at hand of the user. There is a door lock control system (sometimes called "keyless entry").

  In general, a portable transmitter used in such a system transmits a weak radio wave modulated by an ID code at regular intervals. In the receiving unit, the ID code received by the receiving circuit is detected and collated by the decoder, and the door lock mechanism of the vehicle is controlled (locking / unlocking the door) by the controller based on the output of the decoder. Therefore, even if the user does not directly lock / unlock the door by inserting a manual lock into the keyhole of the door, the portable transmitter can be carried around, and the door is automatically unlocked when approaching the vehicle. It is convenient because it is automatically locked when you leave the car.

  If the field intensity of the auto signal is greater than or equal to a predetermined value on the condition that the ID of the auto signal matches that of the portable device that sends a signal (auto signal) including a predetermined ID every predetermined time (for example, 1 second) The door of the door is unlocked, and if it is weaker than the predetermined value, it is locked so that the door can be unlocked and opened just by approaching the car, and the door can be locked by moving away. It is.

  1 and 2 are explanatory views showing a conventional door lock control system for a vehicle, in which the vehicle 1 is parked in a garage 3 of a house 2. In FIG. 2, the door lock control system 9 includes a portable portable device 4, an in-vehicle device 5 mounted on the vehicle 1, and a door key mechanism 6 controlled by the in-vehicle device 5. In FIG. 1, the electric field intensity E of the auto signal A is divided into multiple stages (in FIG. 1, six stages from levels L1 to L6) centering on the position of the vehicle-mounted device 5, and regions between the levels are denoted by R1 to R6 It is shown.

  In FIG. 2, the portable device 4 includes a transmitter 4 a that transmits an unlocking or locking signal including an ID (hereinafter referred to as “auto signal”) at a predetermined time interval (for example, every one second). Yes.

  On the other hand, the in-vehicle device 5 is included in the receiving unit 5a that receives the auto signal A, the electric field strength determining unit 5b that detects the level of the electric field strength E of the auto signal A, and the ID and auto signal A that are set to itself. An ID analyzing unit 5c that determines whether the ID matches the ID, and a control signal output unit 5d that outputs a lock command signal or an unlock command signal to the door key mechanism 6.

  The electric field strength determination unit 5b detects the electric field strength E of the auto signal A received by the receiving unit 5a in multiple steps (in FIG. 1, six steps from level L1 to level L6) centering on the position of the vehicle-mounted device 5. Any level can be set as the first determination value in the electric field strength determination unit 5b. Here, the electric field strength E is determined such that the level L1 is the strongest and the level L6 is the weakest.

  The electric field strength determination unit 5b changes the state of the electric field strength E from L4, L5, or L6 to L1, L2, L3, and the ID analysis unit 5c, when the determination criterion is level L3. When it is determined that the ID set in the self and the ID included in the auto signal A match, the control signal output unit 5d outputs an unlock command signal to the door key mechanism 6, and the electric field strength E When the level changes from the state of L1, L2, L3 to the state of L4, L5, L6, the control signal output unit 5d outputs a lock command signal to the door key mechanism 6.

  In this door lock control system 9, when the owner of the portable device 4 (the user of the vehicle 1) leaves the vehicle 1, the door is automatically locked, and when approaching the vehicle 1, the door is automatically unlocked. For this reason, the troublesome operation of the keys for opening and closing the door is eliminated.

  By the way, as a malfunction of the door lock control system 9, when the portable device 4 exists near the vehicle 1, for example, when the portable device is placed in a place adjacent to the garage 3 (e in FIG. 1), the electric field strength E does not become the first criterion (level L3) or less (that is, the electric field intensity E is any of the levels L4, L5, and L6), and the door cannot be locked.

  Further, when a person walks near the portable device 4 even when the electric field intensity E exists at a position (d in FIG. 1) that is lower than the first determination criterion (level L3), the auto signal A Is reflected by the human body or the like and the electric field intensity E changes, so that the control signal output unit 5d repeatedly outputs an unlock command and a lock command to the door key mechanism 6.

By the way, as shown by a broken line in FIG. 2, a vibration sensor 4b is mounted on the portable device 4, and when there is no vibration, transmission from the transmitter 4a can be prohibited to save power. When the mobile phone 4 is in a stationary state (hereinafter referred to as “abandoned state”), radio waves are not transmitted from the portable device 4. Therefore, when the portable device 4 has such a power saving function, as long as the portable device 4 is stationary, the control signal output unit 5d repeatedly outputs an unlock command and a lock command to the door key mechanism 6. There will be no such situation. There exists patent document 1 etc. as this kind of system.
JP-A-7-113364

  However, the following problems occur in the portable device 4 of FIG. 2 equipped with the vibration sensor 4b. That is, for example, when the portable device 4 is left in the vehicle 1 (passenger seat (see b in FIG. 1), etc.) and the user is outside the vehicle 1, the vibration sensor 4b detects no vibration and transmits. The unit 4a is stopped. Thus, since the auto signal A is not transmitted, the door is in a locked state, which is a so-called “key confined state”.

  Another problem is that the vibration sensor 4b operates by detecting vibrations caused by an earthquake, road construction, construction work, and vibrations caused by the vehicle 1, and the transmission unit 4a starts transmitting the auto signal A. is there. At this time, when the portable device 4 is present at a position where the receiving unit 5a receives the auto signal A with the electric field strength E of the levels L1, L2, and L3, the door of the vehicle 1 is unlocked and the portable device 4 is also portable. When the machine 4 is present at a position where the receiving unit 5a receives the auto signal A at the electric field intensity E at the boundary between the level L3 and the level L4, the auto signal is used when a person walks near the portable machine 4 or the like. A is reflected by the human body or the like, and the electric field intensity E changes, and the control signal output unit 5d repeatedly outputs an unlock command and a lock command to the door key mechanism 6.

  An object of the present invention is to detect the position of a portable device with a vibration detection function by an in-vehicle device mounted on the vehicle, and when the owner of the portable device leaves the vehicle, the door is automatically locked and when the vehicle approaches the vehicle, the door is automatically Providing a door lock control system that can be unlocked, especially prevents power consumption and prevents the portable device from being trapped in the vehicle, and eliminates or reduces unnecessary lock / unlock cycles There is to do.

The door lock control system of the present invention is based on the reception status of a signal including a predetermined code consisting of a first signal and a second signal that are sent from the transmitter of the portable device and serves as a basis for controlling the operation command signal. An in-vehicle device that outputs an operation command signal to a door key mechanism of an automobile is provided. Then, a vibration detection unit that detects vibration, and a code generation that determines the stop and start of the first signal from the output of the vibration detection unit, and outputs the second signal for a predetermined time when the first signal is stopped parts and, Tokoro the portable device equipped with the transmitter unit at a constant time interval to output transmission signals including said predetermined code, and a receiving unit that receives a signal including said plants teichoic over de, the An electric field strength determination unit having a first determination value for determining that the first signal is received and a second determination value for determining that the second signal is received; , said plant teichoic o de signals containing code analyzer for analyzing, in that the transmitting unit from the output of the electric field intensity judgment unit and the code analyzer exists within a predetermined distance of the vehicle-mounted device A confinement determination unit for determining, an output of the code analysis unit, and the Was constructed and a and a control unit for controlling the door key mechanism based on output of the decision unit confinement and the output of the field intensity determination unit said vehicle-mounted device.

As another solution, a signal including a predetermined code composed of the first signal, the second signal, and the third signal, which is a basis for controlling the operation command signal, which is transmitted from the transmitter of the portable device. In-vehicle device that outputs an operation command signal to the door key mechanism of the automobile based on the reception status of the vehicle. Then, the vibration detection unit for detecting vibration, and the stop and start of the first signal are determined from the output of the vibration detection unit, and when the first signal is stopped, the second signal is output for a predetermined time period, Then a predetermined number of times the third and code generator for outputting a signal, and a said transmitter unit to output transmission signals including said predetermined code Jo Tokoro time intervals the mobile device, and the plant teichoic over A receiving unit that receives a signal including a signal, and an electric field strength E of the signal received by the receiving unit, and a first determination value that determines that the first signal is received and the second signal are received. and the electric field strength judgment section having a second judgment value determined, the Exchange and the code analyzer for analyzing a signal containing teichoic over de, the code analyzer and the transmission section from an output of the electric field intensity judgment unit Is determined to be present within a predetermined distance of the in-vehicle device A determination unit, and configured with said code analyzer output and the electric field intensity outputs of the confinement determination of the determination unit and a control unit for controlling the door key mechanism based on the vehicle device.

  In the door lock control system of the present invention, the confinement determination unit determines that the code analysis unit receives the second signal, and the electric field strength determination unit has an electric field strength E equal to or greater than a second determination value. It can be determined that the transmitter is within a predetermined distance of the in-vehicle device.

  In the door lock control system of the present invention, the confinement determination unit determines that the code analysis unit is receiving the second signal, and the electric field strength determination unit determines the electric field strength E equal to or greater than the second determination value. If it is determined that at least the code analysis unit has received the third signal within a predetermined time after the determination, the transmitting unit can be determined to be within a predetermined distance of the in-vehicle device.

  In the door lock control system of the present invention, the code analysis unit receives the first signal when the confinement determination unit determines that the transmission unit exists within a predetermined distance of the vehicle-mounted device. It is possible to prevent the operation command signal from being output to the door key mechanism until the determination is made and the electric field intensity determination unit determines that the signal is received with the electric field intensity E equal to or greater than the first determination value.

  In the door lock control system of the present invention, when the control unit determines that the code analysis unit is receiving the second signal and the electric field strength determination unit is smaller than a second determination value, the control unit controls the door key mechanism. On the other hand, it is possible to generate an operation command signal for performing a locking operation, and to increase the first determination value until the next unlocking.

  In the door lock control system of the present invention, the code generator determines the vibration continuation time of the transmitter from the output of the vibration detector, and the first is generated when the vibration continuation time is within a predetermined value or not. The signal transmission time can be made different.

  In the door lock control system of the present invention, the control unit determines that the code analysis unit is receiving the second signal, and the electric field strength determination unit receives the signal with an electric field strength E equal to or greater than the second determination value. An unlock signal is output as the operation command signal to the door key mechanism, and the code generator determines the vibration duration of the transmitter from the output of the vibration detector, and the vibration The second signal can be output instead of the first signal until the duration time reaches a predetermined value.

  According to the present invention, the position of a portable device with a vibration detection function is detected by an in-vehicle device mounted on the vehicle, and when the owner of the portable device leaves the vehicle, the door is automatically locked and when the vehicle approaches the vehicle, the door is automatically In particular, in addition to saving power, the portable device can be prevented from being trapped in the vehicle, and unnecessary lock / unlock repetition can be eliminated or reduced.

  3 and 4 show the basic configuration of this system. In the following description, reference is made to a diagram in which the vehicle 1 of FIG. 1 is housed in a garage 3 of a house 2. This system is installed at a predetermined portion of the portable device 10 shown in FIG. 3 for sending a predetermined signal and a dashboard or the like (see a in FIG. 1) in the vehicle 1, and the vehicle 1 is based on the reception status of the predetermined signal. 4 includes a vehicle-mounted device 20 shown in FIG. 4 for sending a control command for locking / unlocking to the door key mechanism (electromagnetic lock mechanism) (the door key mechanism is indicated by reference numeral 1a in FIG. 4).

  The portable device 10 includes a code generation unit 11, a transmission unit 12, a control unit 13, a timer 14, a vibration sensor 15, and a transmission antenna 16. The code generation unit 11 can generate an ID code, and the transmission unit 12 receives the ID code generated by the code generation unit 11 and receives a signal including the ID code (hereinafter referred to as “portable device signal S”). It can be transmitted to the outside wirelessly. The control unit 13 includes an intermittent control unit 13a and can control the transmission timing (transmission interval) of the portable device signal S, and the timer 14 can generate a reference signal for operation timing. Furthermore, the vibration sensor 15 can detect its own vibration and can pass it to the control unit 13, and the transmission antenna 16 can wirelessly output the signal generated by the transmission unit 12 to the outside as a signal of a predetermined frequency. Can do. Of course, although not shown, the portable device 10 includes a battery, and a manual operation button or the like may be provided when a manual operation function is added.

  The portable device 10 having the above configuration operates as follows. That is, the timer 14 outputs a timing signal at a preset period, and the timing signal is given to the code generator 11 and the controller 13. The code generator 11 that has received the timing signal gives a predetermined ID code to the transmitter 12. Moreover, the control part 13 will instruct | indicate transmission with respect to the transmission part 12, if a timing signal is received. Thereby, the transmission unit 12 transmits the portable device signal S including the ID code received from the code generation unit 11 to the outside as a radio wave via the transmission antenna 16. The transmitted portable device signal S reaches a certain transmission range determined by the performance of the transmission unit 12, the transmission antenna 16, and the like.

  Therefore, for example, when the user carrying the portable device 10 approaches the vehicle 1 equipped with the vehicle-mounted device 20 (when the vehicle-mounted device 20 enters the transmission range of the portable device signal S), the vehicle-mounted device 20 S is received. As a result, the in-vehicle device 20 can recognize that the portable device 10 is close (within a certain distance range) and unlock the door. The control unit 13 prevents the battery from being consumed by causing the transmission unit 12 to transmit intermittently.

  When the user who owns the portable device 10 is walking or the like, the vibration sensor 15 detects vibration, and thus the portable device 10 transmits the portable device signal S including the ID as described above. When 10 is left on an indoor table or shelf and vibration is not detected, the transmission of the portable device signal S is stopped or the transmission interval is lengthened. As a result, it is possible to prevent further battery consumption and prevent malfunction (so-called “confinement” of the portable device 10) as will be described later.

  On the other hand, the in-vehicle device 20 operates as a pair with the portable device 10 and receives a signal (identified by an ID code) (the electric field strength may be added to the condition of presence / absence of reception) of the vehicle 1. When the door key mechanism 1a is unlocked and the received signal (ID code) is no longer confirmed, a lock command can be output to the door key mechanism 1a. Specifically, the door key mechanism 1a is configured as follows.

  That is, as shown in FIG. 4, the in-vehicle device 20 includes a reception antenna 21, a reception unit 22, a code analysis unit 23, an electric field strength determination unit 24, and a control unit 25. In FIG. 4, the vehicle-mounted device 20 and the door key mechanism 1 a are represented by the vehicle 1 for convenience of explanation. The control unit 25 has a function as a confinement determination unit.

  The receiving antenna 21 can receive the portable device signal S transmitted from the portable device 10, and the receiving unit 22 converts the received portable device signal S into a predetermined signal, and then the code analyzing unit 23 and the electric field strength determination. To part 24.

  The code analysis unit 23 may extract an ID code from the received portable device signal S and determine whether or not it is from the corresponding portable device 10 (whether or not it matches the registered regular ID code). The determination result is given to the control unit 25. In addition, the electric field strength determination unit 24 can compare and determine the electric field strength E of the received signal with one or a plurality of determination values, and can give the determination result to the control unit 25.

  The control unit 25 determines whether or not the door of the vehicle 1 can be locked / unlocked based on information (signal strength E, information on whether or not the signal is received) given by the code analysis unit 23 and the electric field strength determination unit 24. Based on the determination result, a necessary command signal (lock command R / unlock command A) can be output to the door key mechanism 1a.

  When the control unit 25 determines that the code analysis unit 23 has received the portable device signal S including the regular ID code, that is, the reception of the portable device signal S including the regular ID code has been received for a certain period or longer. When the portable device signal S including the legitimate ID code is received from the absence, the in-vehicle device 20 exists within the transmittable range of the portable device 10 (that is, the vehicle 1 in which the in-vehicle device 20 is mounted exists). ) Therefore, since the control unit 25 can determine that the user has approached the vehicle 1, the control unit 25 outputs an unlock command to the door key mechanism 1a.

  On the other hand, when the reception of the portable device signal S including the regular ID code is interrupted, the in-vehicle device 20 is located outside the transmittable range of the portable device 10. That is, the control unit 25 of the in-vehicle device 20 determines that the distance between the vehicle 1 and the portable device 10 is a certain distance or more, and outputs a lock command to the door key mechanism 1a. In the door key mechanism 1a that has received this lock command / unlock command, an electromagnetic coil (not shown) is operated to lock or unlock the door.

  Furthermore, the determination by the control unit 25 is performed in consideration of not only the presence / absence information of the portable device signal S but also the electric field strength E of the received signal. That is, when the vehicle-mounted device 20 locks and unlocks the door only based on whether or not the portable device signal S is received, even if the radio wave cannot be received due to a communication error or other abnormality or failure, There is a risk of malfunctioning when it is determined that the distance is more than a predetermined distance. Therefore, the electric field intensity E of the auto signal (the “first signal” of the present invention), which will be described later, included in the portable device signal S is the first determination value I (for example, the radio field intensity at the boundary between the areas R3 and R4 in FIG. It is possible to control to unlock when it is equal to or higher than (the assumed radio wave intensity), and to lock when it is less than the first determination value I. A specific processing algorithm will be described later.

  When the user who has the portable device 10 approaches the vehicle 1 with the door locked by the portable device 10 and the vehicle-mounted device 20, the door is automatically unlocked, and the door can be opened without manual key operation. Can be opened. Further, when the user leaves the vehicle 1 and then leaves the vehicle 1 with the portable device 10, when the user leaves a certain distance (a distance at which the electric field strength E of the portable device signal decreases to a predetermined value), The door is automatically locked.

  The portable device 10 and the vehicle-mounted device 20 described above can perform the following operations. In the operation example 1 described later of the vehicle-mounted device 20, the determination of “confinement” is performed based on the electric field strength E of the preliminary signal K1. , So as to perform a predetermined operation. That is, in the portable device 10, when the vibration sensor 15 does not detect vibration, simply stopping the transmission of the signal including the ID code, for example, even when the portable device 10 is left on the seat of the automobile 1. Since the vibration sensor 15 cannot detect vibration, the vibration sensor 15 stops and the door is locked, and the portable device 10 may be in a “confined” state. In the present embodiment, for example, the following four methods can be used as a solution method for preventing confinement.

  In the first confinement prevention method, when the state in which the vibration sensor 15 does not detect vibration in the neglected state continues for a predetermined period of time, the portable device 10 signals that it will stop (preliminary signal K1). ) Is transmitted for a predetermined time, and after the predetermined time has elapsed, the portable device 10 is brought into a stopped state.

  The on-vehicle device 20 corresponding to this has a predetermined value (second determination value) in which the electric field strength E is assumed to be within the vehicle 1 when the preliminary signal K1 is received (the second determination value) (FIG. The door is locked when it is lower than the maximum value L1) in 1. Further, after the door is locked, the door is not unlocked until the next auto signal A is received. This state is referred to as a stop mode in this specification.

  In this case, the portable device 10 is stopped after the transmission of the preliminary signal K1 and does not generate an auto signal unless the portable device 10 is vibrated. For example, immediately after the parking lot (see 3 in FIG. 1). Unnecessary door unlocking or locking does not occur even when there is a storage place for the portable device 10 in the bedroom or other sideways.

  Further, when the electric field intensity E when receiving the preliminary signal K1 is equal to or higher than the second determination value, the mode is shifted to the stop mode without locking the door. By doing so, in the situation where the portable device is left in the passenger seat (see b of FIG. 1) of the vehicle 1, the transmission of the preliminary signal K1 is completed, and the portable device 10 is stopped and the portable device 10 is stopped. Even when the radio wave from the vehicle is not received, it is possible to prevent the inconvenience that the door is locked unnecessarily and the key is locked in the vehicle 1.

  That is, when the portable device 10 is left in the vehicle 1 (passenger seat or the like), as in the case where the portable device 10 is left in the home, after the preliminary signal K1 is sent for a certain period of time, the signal transmission is stopped. The in-vehicle device 20 side cannot receive radio waves from the portable device 10. However, when the vehicle 1 is left in the room, the distance between the portable device 10 and the vehicle-mounted device 20 is very short, so that the electric field strength E of the received backup signal K1 is very high. Therefore, the in-vehicle device 20 can infer from the magnitude of the electric field intensity E of the received preliminary signal K1 whether it is left in the vehicle 1 or left in a regular storage location outside the vehicle 1. Therefore, when the electric field intensity E of the preliminary signal K1 is large, it is determined that the standby signal K1 is left in the vehicle 1, and even if the transmission of the preliminary signal K1 is stopped and the radio wave from the portable device 10 cannot be received, the door is opened. I tried not to lock it. Thereby, confinement in the vehicle 1 of the portable device 10 can be suppressed.

  By the way, for example, the portable device 10 is placed in a place where the second determination value is assumed, such as a point b in FIG. 1, while being put in a bag, or as a point c in FIG. When the portable device 10 is placed at the boundary of the place where the second determination value is obtained, the electric field intensity E of the preliminary signal K1 becomes unstable due to the influence of the person in the vehicle 1 or the opening / closing of the door, and the like. There is a risk of being unable to judge. Therefore, it is preferable to make a determination in a state where the electric field strength E is stable in order to “receive the preliminary signal K1”.

  Therefore, the electric field intensity E of the preliminary signal K1 at that time may be determined on the condition that the preliminary signal K1 having a stable electric field intensity E is received for a predetermined time (determination time: for example, 5 seconds). In such a case, since it takes a certain amount of time to determine the electric field strength E of the preliminary signal K1, it can be dealt with by setting the generation signal of the preliminary signal K1 in the portable device 10 to be longer. In other words, the electric field strength E fluctuates due to the influence of an influencer such as a person or a bag, but by sending out the preliminary signal K1 for a long time, the vehicle-mounted device 20 can perform a plurality of trials, The possibility of stable reception without being affected can be ensured.

  In the second confinement prevention method, in order to reliably prevent confinement of the portable device 10, the generation time of the preliminary signal K1 is increased (for example, 60 seconds), the door is locked when the preliminary signal K1 is stopped, and the mode is shifted to the stop mode. Whether to shift to the stop mode without locking.

  The fact that all the spare signals K1 can be received at the second determination value (for example, level L1) or more means that the spare signal K1 has been stably stopped at a place where the portable device is assumed to be present inside the vehicle 1. However, in practice, it is difficult to obtain all the preliminary signals K1 by a person or an object. In addition, when the in-vehicle device 20 has received the preliminary signal K1 for a predetermined time and the electric field strength E at, for example, the level L1, and then suddenly moved away from the vehicle (for example, changed to a motorcycle in the immediate vicinity of the vehicle 1 and talked with someone When the portable device returns from the stopped state and starts sending a signal (auto signal) when the vehicle is run away later, the in-vehicle device 20 cannot receive the auto signal from the portable device and the signal disappears after receiving the spare signal K1. Therefore, the door of the vehicle 1 is not locked.

  In order to cope with such a situation, the spare signal K1 from the portable device 10 is continuously supplied to the second determination value (for example, the level) during the standby signal K1 generation time (for example, 60 seconds) when the portable device 10 is stopped. L1) When all of the above are received, the mode is shifted to the stop mode without locking the door. In other cases (when the second determination value (for example, level L1) is not exceeded for 60 seconds or the preliminary signal K1 is not received) To lock into the stop mode.

  Note that it is practically difficult to continuously perform reception with a stable electric field strength E due to the influence of people or the like. For this reason, this inconvenience is caused by receiving the second determination value (for example, in FIG. 1) on condition that the reception is performed with a predetermined value less than the second determination value (for example, the level L2 range or more in FIG. 1) during the determination time. When the rate at level L1) is equal to or higher than a predetermined rate (80%), it can be solved by taking appropriate measures such as determining that the standby signal K1 having the second determination value or more is stably received. .

  In the third confinement prevention method, in order to surely prevent the portable device 10 from being confined, after the portable device 10 transmits the spare signal K1 for a predetermined time, a stop signal indicating that the portable device 10 enters the stop state is transmitted a predetermined number of times. And put the portable device in a stopped state.

  The in-vehicle device 20 does not perform the locking operation by receiving the stop signal even once within the predetermined time after receiving the electric field intensity E of the preliminary signal K1 at the second determination value (for example, level L1) or more for a predetermined time. Transition to stop mode.

  Specifically, when the in-vehicle device 20 receives a preliminary signal K1 having an electric field intensity E equal to or higher than the second determination value for a predetermined time (determination time: 5 seconds, for example), the auxiliary signal K1 equal to or higher than the second determination value is received. In order to prevent the influence of the fluctuation of the electric field intensity E and to improve the establishment of the determination by receiving the spare signal K1, the spare signal K1 generation time in the portable device 10 is determined to be long (for example, 60 seconds) After generation of the signal K1, a stop signal is transmitted.

  The in-vehicle device 20 determines that the preliminary signal K1 having the electric field intensity E equal to or higher than the second determination value (for example, the level L1) has been received, and outputs a stop signal once during a predetermined time (here, the generation time of the preliminary signal K1). If received, it is possible to shift to the stop mode without locking the door. Further, when the stop signal is received, when the spare signal K1 smaller than the second determination value (for example, the level L1) is received or when the spare signal K1 is not received, the door can be locked to shift to the stop mode.

  In this way, even if the electric field intensity E changes due to an influencer such as a person or the reception of the preliminary signal K1 is interrupted during the generation of the preliminary signal K1, the mobile device 10 is reliably prevented from being confined. It is possible to prevent the door from being left open even though it is not confined.

  In the fourth confinement prevention method, the lock determination is performed immediately and the confinement determination is performed when a stop signal is received in order to reliably prevent the portable device 10 from being confined. In the case where priority is given to quickly performing door locking, when the in-vehicle device 20 determines that the electric field intensity E of the preliminary signal K1 is weaker than the second determination value (for example, level L1), it immediately performs the locking operation. Transition to stop mode. Further, when the state where the preliminary signal K1 is equal to or greater than the second determination value continues, the stop signal is received to shift to the stop mode without performing the lock operation.

  Specifically, the portable device 10 is confined when the in-vehicle device 20 receives the preliminary signal K1 having an electric field strength E weaker than the second determination value (for example, L1) for a predetermined time (determination time—for example, 5 seconds). It is determined that the target position is not present, and after the locking operation, the mode is shifted to the stop mode. The generation time of the spare signal K1 in the portable device 10 is set to a certain length (for example, 60 seconds) in order to prevent the influence of the fluctuation of the electric field intensity E and to increase the establishment of the determination by receiving the spare signal K1, and the portable device 10 has the spare signal K1. After the occurrence of, the stop signal K2 is transmitted. If the in-vehicle device 20 does not determine that the preliminary signal K1 having the electric field strength E weaker than the second determination value (for example, the level L1) is received until the stop signal K2 is received, the portable device 10 has the key It judges that it was in the position which becomes the confinement object of, and shifts to the stop mode without performing the door lock operation.

  By the way, when the portable device 10 is at a position where the door is the boundary of the lock / unlock determination with respect to the vehicle-mounted device 20, unnecessary lock / unlock occurs. In order to prevent this lock / unlock, it is preferable that the vibration sensor 15 is not operated by vibrations other than when the user possesses or uses it. For this purpose, a delay may be provided for vibration detection. However, considering the fact that signal transmission is performed at a predetermined time interval for power saving, it is preferable to send an auto signal smoothly when the user picks up the portable device, and the delay time is unnecessarily Can not be lengthened.

In the present embodiment, for example, the following three solutions can be used as a solution for preventing unnecessary lock / unlock.
In the first unnecessary lock / unlock prevention method, the first determination value I is temporarily increased by locking with the preliminary signal K1. Therefore, when the in-vehicle device 20 is locked based on the preliminary signal K1, and the electric field intensity E of the preliminary signal K1 when the in-vehicle device 20 is locked is greater than or equal to the first determination value I, the first 1 judgment value I is higher than the electric field strength E temporarily (for example, until unlocked by the auto signal A next time) (when the spare signal K1 is received or when the lock judgment is performed by the spare signal K1) The value is changed to a value (referred to as “third determination value”).

  For example, when the first determination value is level L3 and the electric field intensity E changes from level L4, L5 or level L6 (L6 includes an unreceived state) to level L1, L2, L3, unlock is performed. Assuming that the electric field intensity E of the preliminary signal K1 is level L3, the door is immediately unlocked when the portable device 10 is activated.

  At this time, if the first determination value K is temporarily set to the level L2, even if the portable device 10 is activated by vibration, it is not unlocked. Note that the unlocking operation by the user approaching the vehicle 1 needs to be closer to the vehicle 1 than the normal first determination value, but there is no practical problem.

  In the above case, if the electric field intensity E of the preliminary signal K1 is level L4, the electric field intensity E of the signal emitted from the portable device 10 may become level L3 due to the influence of a person or the like. is there. Therefore, also in this case, it is preferable to temporarily change the first determination value to the level L2.

  Further, when the door is locked based on the preliminary signal K1 for easier implementation, the same effect can be obtained by temporarily setting the first determination value to a predetermined value (for example, level L1). .

  In the second unnecessary lock / unlock prevention method, the time for outputting the auto signal A from the portable device 10 is changed depending on the duration of vibration. In order to stably detect the stop of the vibration, the portable device 10 stops the transmission of the auto signal A and switches to the transmission of the preliminary signal K1 when a continuous period of no vibration continues for a predetermined time. Is generally done. Normally, assuming that the user is browsing at a convenience store or the like, the time until the auto signal A is stopped is increased to about 60 seconds.

  When the mobile device 10 starts up due to vibrations that do not belong to the user, it is often caused by sudden vibrations such as a person hitting something in the same house and receives a continuous signal There are few things. On the other hand, when the user has the portable device 10, the portable device 10 is often subjected to continuous vibration.

  From this, when the vibration received by the portable device 10 is within a predetermined time (for example, 10 seconds), it is determined that the vibration is not caused by the user carrying it, and the time until the stop of the auto signal A is determined. For example, if the vibration received by the portable device is 10 seconds or longer, the user determines that the user has the portable device 10 and increases the time until the auto signal stops to about 60 seconds. .

  Thereby, even if the position where the portable device 10 is placed is the boundary position of unlocking, the occurrence of the locking and unlocking operation can be suppressed to 10 seconds. In addition, after the auto signal A is stopped, the lock signal is switched to the spare signal K1, and the lock determination value at that time becomes the second determination value (for example, the level L1), so that the lock state is surely achieved.

  In the third unnecessary lock / unlock prevention method, on the condition of unlocking in the stop mode, a condition that the standby signal K1 is unlocked when received at the second determination value or more is added, and the portable device 10 is carried by the user. If it is determined that the vibration is not caused by the above, the automatic signal is not generated when the portable device 10 is activated, and the spare signal K1 is generated.

  In this case, the spare signal K1 is transmitted from the portable device 10 until a predetermined time (for example, 10 seconds) in which the user may not use the portable device 10, and the unlock reference at that time is the second determination. Since it is a value (for example, level L1), unnecessary lock unlock can be prevented.

  On the other hand, in this case, since the preliminary signal K1 is transmitted until it is determined that the user is using the portable device (in this case, 10 seconds), the unlock reference is the second determination value, which is 10 seconds. The auto signal is switched from the time point. For this reason, depending on the distance from the place where the portable device 10 is installed to the vehicle 1, there is a situation where the vehicle 1 cannot be unlocked unless it is in the immediate vicinity of the vehicle 1. When this happens, an auto signal is sent and normal operation is performed.

[Operation example 1 of portable device]
Specifically, the portable device 10 is configured to perform the operation shown in the flowchart shown in FIG. That is, first, it is determined from the output of the vibration sensor 15 whether the portable device 10 is vibrating (S11). If the vibration sensor 15 has not detected vibration (“NO” in S11), there is a high possibility that the portable device 10 is left unattended.

  In S11, when the vibration sensor 15 detects vibration (“YES” in S11), since it can be estimated that the portable device 10 is carried by the user, the auto signal A including the ID code (“first” of the present invention). The transmission of the signal ") at a predetermined time interval is started (S12). Thereby, as will be described later, the auto signal A is transmitted from the transmission antenna 16 at predetermined intervals, and the in-vehicle device 20 that has received the auto signal A controls the locking and unlocking of the door.

  Next, the control unit 13 of the portable device 10 receives the output of the vibration sensor 15 in parallel with the transmission of the auto signal A at a predetermined interval, and determines the presence or absence of vibration. Then, while the vibration continues to be detected, the auto signal continues to be sent because S13 is repeatedly executed in a loop.

  On the other hand, when vibration is no longer detected (“YES” in S13), there is a high possibility that the portable device 10 has been left, so the internal timer is reset and started (S14). Then, the presence / absence of vibration is detected after the start (S15). If vibration is detected before 60 seconds elapse (S15 “NO”), the process returns to S11. Usually, since vibration is continuously detected as it is, there is vibration, and transmission of the auto signal A is continued.

  If the vibration-free state continues for 60 seconds after the start of sending the auto signal A, the branch determination at S15 and S16 will continue to be “YES”, so jump to S17 and stop sending the auto signal A. At the same time, a preliminary signal K1 (second signal of the present invention) is sent (S17).

  Thereafter, the transmission of the preliminary signal K1 is stopped on condition that the vibration-free state continues for 120 seconds (S18, S19, S20). If vibration is detected before the elapse of 120 seconds, “NO” is determined in the next determination of presence / absence of vibration (S18), so that the process jumps to S20 to stop sending the preliminary signal K1 (S20).

  In any of the above cases, after stopping the transmission of the preliminary signal K1, the process returns to S11 to determine the presence or absence of vibration. Therefore, if no vibration continues for 120 seconds, no vibration is detected for the time being, so the branch determination in S11 is “NO”, so that after the transmission of the preliminary signal K1 is stopped, a standby state in which no signal is transmitted is set. Become.

  On the other hand, when vibration is detected before the elapse of 120 seconds and transmission of the preliminary signal K1 is stopped, the branch determination of S11 is normally “YES”, so that transmission of the preliminary signal K1 is stopped and an auto signal A transmission is started.

[Operation example 2 of portable device]
FIG. 6 is a flowchart illustrating an operation example 2 of the portable device 10. S21 to S29 in FIG. 6 are the same as S11 to S19 in FIG. In S20 of FIG. 5, the K1 signal is stopped, but in S30 of FIG. 6, the stop signal (the third signal of the present invention) K2 is sent together with the stop of the preliminary signal K1. 6 is used together with the vehicle-mounted device 20 of the operation example 3. In FIG. 6, after the portable device 10 transmits the spare signal K <b> 1 for a predetermined time, a stop signal indicating that the portable device 10 enters the stopped state is transmitted a predetermined number of times to put the portable device in the stopped state.

[Operation example 3 of portable device]
FIG. 7 is a flowchart illustrating an operation example 3 of the portable device 10 using the second unnecessary lock / unlock prevention method. In FIG. 7, when the vibration sensor 15 detects vibration (S31), the timer 14 is set to 10 seconds and started (S32), and transmission of an auto signal is started (S33). Thereafter, the presence or absence of further vibration is determined by the vibration sensor 15 (S34). When there is no vibration (“YES” in S34), the timer 14 is reset and started (S37), and then for a predetermined time T (here, 10 seconds), it is determined whether or not the vibration-free state has continued for T seconds (S38, S39). If not, the process returns to S32, and if it continues, the auto signal A is stopped. After sending the preliminary signal K1, the process returns to S31 (S40). In S34, when there is vibration ("NO" in S34), the setting is changed to 60 seconds when the timer 14 is set to 10 seconds (S35, S36).

[Operation example 4 of portable device]
FIG. 8 is a flowchart showing an operation example 4 of the portable device 10 using the third unnecessary lock / unlock prevention method. In FIG. 8, when the vibration sensor 15 detects vibration (S41), the timer 14 is started (S42), and the transmission of the preliminary signal is started (S43). Thereafter, the presence or absence of further vibration is determined by the vibration sensor 15 (S44). When there is no vibration ("YES" in S34), the timer 14 is reset and started (S52), and then for a predetermined time T (here, 10 seconds), it is determined whether or not the vibration-free state has continued (S53, S54). If the vibration does not continue, the process returns to S42, and if it continues for T seconds, the preliminary signal K1 is stopped. (S55), the process is returned to S41.

  In S44, when there is vibration (“NO” in S44), it is determined whether the timer 14 has reached 10 seconds (S45). If not, the process returns to S44 to 10 seconds. If it is, the preliminary signal K1 is stopped and the transmission of the auto signal A is started (S46). Thereafter, it is determined whether or not the vibration is eliminated (S47). If there is a vibration, the process is returned to S42. If the vibration is eliminated, the timer 14 is reset and started (S48). Thereafter, it is determined whether or not the vibration continues for 60 seconds (S49, S50). If not, the process returns to S42. If it continues, the auto signal A is stopped and the preliminary signal K1 is sent. The process returns to S41 (S51).

[Operation example 1 of in-vehicle device]
With reference to FIG. 9, an operation example 1 of the in-vehicle device 20 using the first confinement prevention method will be described. By using the portable device 10 described above, the in-vehicle device 20 can execute the following operation. In the first operation example, the “containment” is determined based on the electric field strength E of the preliminary signal K1, and the predetermined operation is performed. I made it. That is, in the portable device 10, when the vibration sensor 15 does not detect vibration, if the transmission of the signal including the ID code is simply stopped, for example, even if the portable device 10 is left on the seat of the vehicle 1, the vibration is generated. Since the sensor 15 can no longer detect vibrations, the sensor 15 stops, the door is locked, and the portable device 10 may be in a “confined” state.

  Therefore, instead of stopping immediately, if the state in which the vibration sensor 15 has not detected vibration in the neglected state continues for a predetermined time, a signal indicating that the mobile device 10 will stop (preliminary signal K1) is sent for a predetermined time. Thus, the portable device is brought into a stopped state after the predetermined time has elapsed.

In S61 to S67, when the electric field intensity E of the auto signal is equal to or higher than the first determination value I, a series of processes for shifting from the stop mode (the mode in which the predetermined vibration is not unlocked) to the unlock mode.
In S71 to S76, when the preliminary signal K1 is received with a stable electric field strength E, a series of processes for performing a determination operation that the electric field strength E is equal to or greater than a predetermined value (second determination value: E1 here) It is.
S81 to S85 are a series of processes for determining whether to lock from the unlock mode and shift to the stop mode, or to shift to the stop mode without locking.

《Unlock processing》
When the auto signal A is received from the portable device 10 (“YES” in S61), when the auto signal A is equal to or higher than the preset electric field intensity E (first determination value: level L2) (“YES” in S62). ) Initializes variable N of timer A (N = 0) (S63).

  That is, as shown in S81 to S85, which will be described later, the door is not locked before the predetermined time (N count value: 5 seconds) has elapsed since entering the unlock mode ("NO" in S81). When the predetermined time has elapsed (“YES” in S81: when the state in which the auto signal A having the intensity equal to or higher than the first determination value (level L2) has not been received continues for 5 seconds or more), the stop mode (in the stop mode, the user The vehicle 1 is away). When the auto signal A having the electric field strength E equal to or higher than the first determination value (level L2) is received even once during the stop mode, it means that the portable device 10 exists within the predetermined range as described above. The timer A is stopped and the count is initialized (N = 0) (S61 to S63).

  Next, the current mode is determined (S64), and if it is the stop mode (“YES” in S64), the door is unlocked (S65). Accordingly, when the door of the vehicle 1 is approached from a distant place, the door is automatically unlocked, so that the user does not need to perform key operations. In S64, when the current mode is not the stop mode ("NO" in S64: that is, in the unlock mode), the door is in the unlocked state, so there is no need to unlock again, so the process is performed. Return to S61.

  When the door is unlocked in S65, the timer B is stopped, the count is initialized (M = 0), the timer A is started (N count is started: S66), and the unlock mode is set. Here, the count value M is the duration of the spare signal K1, and the fact that the unlock process has been performed in S65 means that the spare signal K1 has been interrupted. The determination process using the signal K1 can be performed appropriately.

<< Preliminary signal K1 processing >>
In the case of not receiving the auto signal, (1) the auto signal A from the portable device 10 has already been switched to the spare signal K1, (2) the portable device 10 is stopped, (3) the portable device 10 May not have received the auto signal A having the electric field strength E equal to or higher than the first determination value (level L2).

  As described above, S71 to S76 indicate processing in a state where the spare signal K1 is received. The reception of the preliminary signal K1 means that the first set time (60 seconds in this operation example) or more has elapsed since the portable device 10 no longer detects vibration, but the second set time (in this operation example). 120 seconds) is not exceeded.

  When the preliminary signal K1 is received (“YES” in S71), it is determined whether or not the electric field intensity E of the auto signal A has changed (S72). S72 is a process for confirming whether or not the auto signal A is stably received. When the auto signal A is not stably received for a predetermined period, the mobile device 10 has moved to the vicinity of the mounting location. It can be determined that there is a high possibility that a change in the electric field strength E has occurred. Therefore, based on the second determination value (level L1) of the electric field strength E, which will be described later, when the auto signal A having a stable electric field strength E is received, the portable device 10 may be placed in the vehicle 1. It is estimated that the property is high.

  When the electric field intensity E of the auto signal A has not changed (“YES” in S71), the count value M is less than 5 seconds (that is, the duration of stable reception of the standby signal K1 is less than 5 seconds). Determine whether. When the count value M is less than 5 seconds (“YES” in S73), the duration of stable reception is measured while the standby signal K1 is being received by the following processing. That is, it is determined whether or not M = 0 (S75). When M ≠ 0 (“NO” in S75), since timer A has already started counting, the process returns to S61, and M = 0. If so ("YES" in S75), since the timer B has not yet started counting, the timer B is started and the process returns to S61 (S76). If it is determined in S72 that the electric field intensity E of the auto signal A has changed ("NO" in S72), the timer B is initialized, the timer B is started, and the process returns to S61 (S76).

  In S73, when M ≧ 5 (“NO” in S73), that is, when the electric field strength E is equal to or higher than the second determination value (level L1) and is stably received for 5 seconds, the level of the electric field strength E is L1. (S76), and when the level of the electric field strength E is L1 (“YES” in S76), the portable device 10 can be regarded as being placed in the vehicle 1 and the door is locked. Without transitioning to the stop mode (S84, S85). If the electric field strength E is not at the level L1 in S74, it is considered that the vehicle-mounted device 20 is outside the vehicle 1, and as described below, this is the unlock mode, so the door is locked (S83) and stopped. The mode is changed (S84).

<< Transition to stop mode >>
When it is determined in S71 that there is no spare signal K1 ("NO" in S71), it is determined whether the count value N is 5 or more (S81). N is a count value of the timer B, and after shifting to the unlock mode (at the time of transition, the electric field strength E is equal to or higher than the first determination value I: refer to S63 to S67). This is the time during which no auto signal is received (see S61 and S62).

  When the count value N is smaller than 5 (5 seconds) (“NO” in S81), the process returns to S61, and when the count value N reaches 5 (automatic signals equal to or greater than the first determination value I are continuously generated). If it has not been received for 5 seconds: “YES” in S81), it is determined whether or not it is currently in the unlock mode (S82). When the count value N reaches 5, this means that the output of the auto signal A of the portable device 10 is stable, and if it is in the unlock mode (“YES” in S81), the door is locked (S83). ) After the timers A and B are stopped (N = 0, M = 0) (S84), the mode is shifted to the stop mode (S84).

  In S84, the timers A and B are stopped (N = 0, M = 0). After entering the stop mode, when the mode is shifted to another mode, the mode is shifted to the unlock mode in S65. Only in this case (see S64 and S65). In this case, it is only determined whether or not an auto signal having an electric field intensity E equal to or higher than the first determination value I is received (see S61 and S62). The count values N and M of the timers A and B are not referred to. Therefore, in S84, the timers A and B are stopped and the count values N and M are initialized.

  In this operation example, as described above, when the preliminary signal K1 is stably received in S74 for 5 seconds or longer and the electric field strength E is equal to or higher than the second determination value (level L1) in S74, the portable device 10 is the vehicle. 1, the mobile device 10 is shifted to the stop mode without locking the door to prevent the mobile device 10 from being confined. However, if the electric field strength E is less than the second determination value, the mobile device 10 is outside the vehicle 1. As a certain thing, if it is unlock mode, it locks immediately and shifts to stop mode.

  Moreover, in this operation example, the portable device 10 continuously transmits the preliminary signal K1 for 60 seconds. When the user leaves the vehicle 1, the in-vehicle device 20 normally receives the preliminary signal K1 whose electric field intensity E stable for 5 seconds or more is smaller than the level L1, locks the door, and then shifts to the stop mode (“S74” NO ", S82-S85). However, even if the standby signal K1 cannot be received at all due to the reception of jamming waves or the like, if the count value N of the timer A is larger than 5 (that is, if 5 seconds or more have passed since the unlocking), the lock will occur. Then, since it becomes the stop mode (S81 to S85), safety is high in terms of crime prevention.

[Operation example 2 of in-vehicle device]
An operation example 2 of the in-vehicle device 20 using the second and fourth confinement prevention methods will be described with reference to FIG. In this operation example 2, the “unlock process” (S61 to S67) is the same as the process in the operation example 1 (see FIG. 9). In the operation example 2, among the << preliminary signal K1 processing >> (S71 to S77), S71 to S76 are the same as the processing in the operation example 1. Furthermore, in the operation example 2, among the << shift process to the stop mode >> (S81 to S86), S81 to S85 are the same as the processing in the operation example 1.

  In the first operation example, the stable standby signal K1 equal to or higher than the second determination value (level L1) is received for 5 seconds to shift to the stop mode (see S73, S76, S82, and S83 in FIG. 9). On the other hand, in this operation example, after receiving the stable standby signal K1 equal to or higher than the second determination value (level L1) for 5 seconds, the mobile device 10 is determined to be confined when the standby signal K1 disappears (determination in S81). It is carried out.

  In general, if the portable device 10 outputs a spare signal K1 for 60 seconds, when the portable device 10 is present in the vehicle 1, unless there is an influence of humans or other interference or other interference for 60 seconds. It is received with the second determination value K1 or more. However, since the portable device 10 uses weak radio waves and is susceptible to interference from other radio waves, a more reliable determination can be made if a stable standby signal K1 greater than the second determination value is received for a predetermined time or more. It can be carried out.

  Specifically, when the auto signal A receives the stable spare signal K1 in S73 for 5 seconds or more, the variable N is reset (N = 0), the timer A is started (S77), and the process returns to S61. , S61, S71, S72, S73, S76, S77 are repeated. Then, when the spare signal K1 disappears (when “NO” in S71), the process proceeds to S81. However, since the counter value N is initialized in the process of S77 immediately before (N = 0). Therefore, “5 ≧ N” is not satisfied in the determination of S81, and the process proceeds to S86. In S86, when the counter value M is 21 to 59 (when 20 <M <60: “YES” in S86), the door shifts to the stop mode without locking the door (S84, S85).

  In S86, when the counter value M is 20 or less and 60 or more (“NO” in S86), the process returns to S61. In this operation example, it is considered that the portable device 10 is in the vehicle 1 when the counter value M is 20 or more, that is, when the standby signal K1 is stably received for the second determination value or more for 20 seconds. . Further, since the preliminary signal K1 is not continuously output for 60 seconds or more, the counter value M does not exceed 60. However, the processing is performed when the counter value M is 60 or more in the flow processing. It returns to S61.

  In the second operation example, by appropriately adjusting the range of the counter value M, the accuracy of the confinement determination (determination in S81) can be increased even when the standby signal K1 cannot be received due to the influence of the interference wave or the like.

[Operation example 3 of in-vehicle device]
An operation example 3 of the vehicle-mounted device 20 using the third and fourth confinement prevention methods will be described with reference to FIG. In Operation Example 3, << Unlock Processing >> (S61 to S67) is the same as the processing in Operation Example 1 (see FIG. 9). In the operation example 3, << preliminary signal K1 processing >> (S71 to S76) is the same as the processing in the operation example 1. Furthermore, in the operation example 3, among the << shift process to the stop mode >> (S81 to S85, S91, S92), S81 to S85 are the same as the processing in the operation example 1.

  In this operation example, a portable device 10 (see FIG. 6) that transmits a stop signal K2 is assumed. That is, when the standby signal K1 is not received in S71 (“NO” in S71), it is determined whether or not the stop signal K2 is received (S91), and when the stop signal K2 is not received (“S91” NO "), it is determined whether or not the counter value N is 5 or more, and if it is 5 or more, the door is locked and the stop mode is set (S81 to S86).

  When the stop signal K2 is received in S91 (“YES” in S91), it is determined whether or not the backup signal K1 is received (0 <M <60: whether the counter value M is between 0 and 60). However, when 0 <M <60 (“YES” in S92), the door is not locked and the mode is shifted to the stop mode. When 0 <M <60 is not satisfied (when M = 0 or 60: S92) "NO"), after locking the door, shifts to the stop mode (see S82 to S84).

  Since the determination based on the duration of the spare signal K1 is not performed, in S91, it is merely confirmed whether or not the spare signal K1 has been received before the stop signal K2, and the standby signal K1 is not received. When a state that does not normally occur such as receiving the stop signal K2 occurs, it is determined as an abnormal situation, and the flow is shifted from the lock to the stop mode (see S81 to S85).

[Operation example 4 of in-vehicle device]
An operation example 4 of the in-vehicle device 20 using the first confinement prevention method and the third unnecessary lock / unlock prevention method will be described with reference to FIG. In the operation example 4, << unlock process >> (S61 to S67) is the same as the process in the operation example 1 (see FIG. 9). In the operation example 4, among the << preliminary signal K1 processing >> (S71 to S76.S78), S71 to S76 are the same as the processing in the operation example 1. Furthermore, in the operation example 3, << the transition process to the stop mode >> (S81 to S85) is the same as the process in the operation example 1.

  When it is in the stop mode (S85), it means that the portable device 10 is outside the vehicle 1, but the portable device 10 is in a place where a signal equal to or higher than the first determination value I is received. In this case, even the slight vibration may cause the portable device 10 to operate and cause unnecessary unlocking.

  In order to cope with this, in this operation example, when there is vibration, the preliminary signal K1 is transmitted for the time being, and the automatic signal A is switched over with the passage of time thereafter. As a result, even when the standby signal K1 is received, when the portable device 10 is in the immediate vicinity of the vehicle 1, the door can be unlocked on the condition that it is in the stop mode. .

  Specifically, immediately after the determination (S76) as to whether or not the electric field intensity E is at the level L1 (whether or not it is equal to or higher than the second determination value), a determination is made as to whether or not the stop mode is set (S78). Like to do. As a result, the door can be unlocked when the preliminary signal K1 greater than or equal to the second determination value is received in the stop mode.

  Normally, the portable device 10 is unlikely to exist at the position of the electric field strength E weaker than the first determination value I. However, if the second determination value (level L1) is wide, the possibility increases. . In such a case, this operation example is useful, and it is possible to prevent unnecessary locking and unlocking of the door and to reliably unlock the door when necessary.

It is a figure which shows a mode that the car is stored in the garage of a house. It is a figure which shows the conventional door lock control system. It is a figure which shows the portable machine used for the system of this invention. It is a figure which shows the vehicle equipment and door key mechanism which are used for the system of this invention. It is a flowchart which shows the operation example 1 of a portable device. It is a flowchart which shows the operation example 2 of a portable device. It is a flowchart which shows the operation example 3 of a portable device. It is a flowchart which shows the operation example 4 of a portable device. It is a flowchart which shows the operation example 1 of a vehicle equipment. It is a flowchart which shows the operation example 2 of a vehicle equipment. It is a flowchart which shows the operation example 3 of a vehicle equipment. It is a flowchart which shows the operation example 4 of a vehicle equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Portable machine 21 Car equipment 11 Code generation part 12 Transmission part 13 Control part 14 Timer 15 Vibration sensor 16 Transmission antenna 21 Reception antenna 22 Reception part 23 Code analysis part 24 Electric field strength determination part 25 Control part

Claims (8)

An operation command is issued to the door key mechanism of the vehicle based on the reception status of a signal including a predetermined code consisting of a first signal and a second signal that is sent from the transmitter of the portable device and serves as a basis for controlling the operation command signal. A door lock control system including an in-vehicle device that outputs a signal,
The portable device is
A vibration detector for detecting vibration;
A code generation unit that determines the stop and start of the first signal from the output of the vibration detection unit, and outputs the second signal for a predetermined time after the first signal is stopped,
With the transmitting unit to output transmission signals including said predetermined code at a predetermined time interval,
The in-vehicle device is
A receiver for receiving a signal including said plants teichoic over de,
An electric field strength determination unit having a first determination value for determining that the electric field intensity E of the signal received by the receiving unit is received and determining that the first signal has been received, and a second determination value for determining that the second signal has been received. When,
A code analyzer for analyzing a signal containing the plant teichoic over de,
A confinement determination unit that determines that the transmission unit exists within a predetermined distance of the in-vehicle device from outputs of the code analysis unit and the electric field strength determination unit;
A door lock control system comprising a control unit that controls the door key mechanism based on the output of the code analysis unit, the output of the electric field strength determination unit, and the output of the confinement determination unit. Based on the reception status of a signal including a predetermined code consisting of the first signal, the second signal, and the third signal, which is a basis for controlling the operation command signal, sent from the transmitter of the portable device, the door key of the automobile A door lock control system including an in-vehicle device that outputs an operation command signal to a mechanism,
The portable device is
A vibration detector for detecting vibration;
The stop and start of the first signal is determined from the output of the vibration detection unit, and when the first signal is stopped, the second signal is output for a predetermined time period, and then the third signal is output a predetermined number of times.
A code generator;
With the transmitting unit to output transmission signals including said predetermined code at a predetermined time interval,
The in-vehicle device is
A receiver for receiving a signal including said plants teichoic over de,
An electric field strength determination unit having a first determination value for determining that the electric field intensity E of the signal received by the receiving unit is received and determining that the first signal has been received, and a second determination value for determining that the second signal has been received. When,
A code analyzer for analyzing a signal containing the plant teichoic over de,
A confinement determination unit that determines that the transmission unit exists within a predetermined distance of the in-vehicle device from outputs of the code analysis unit and the electric field strength determination unit;
A door lock control system comprising a control unit that controls the door key mechanism based on the output of the code analysis unit, the output of the electric field strength determination unit, and the output of the confinement determination unit. The confinement determination unit within a predetermined time after the code analysis unit determines that the second signal is received and the electric field strength determination unit determines that the electric field strength E is equal to or greater than the second determination value. 3. The door lock control system according to claim 2, wherein, when at least the code analysis unit determines that the third signal has been received, it is determined that the transmission unit exists within a predetermined distance of the in-vehicle device. The confinement determination unit determines that the code analysis unit receives the second signal, and the transmission unit determines that the electric field strength determination unit determines that the electric field strength E is equal to or greater than a second determination value. 4. The door lock control system according to claim 1, wherein the door lock control system is determined to exist within a predetermined distance of the in-vehicle device. 5.   The control unit determines that the code analysis unit has received the first signal and the electric field strength determination when the confinement determination unit determines that the transmission unit is within a predetermined distance of the in-vehicle device. 5. The door lock according to claim 3, wherein the operation command signal is not output to the door key mechanism until it is determined that the unit is receiving with the electric field intensity E equal to or greater than the first determination value. Control system.   The control unit determines that the code analysis unit is receiving the second signal, and an operation command for causing the door key mechanism to perform a locking operation when the electric field strength determination unit is smaller than a second determination value. The door lock control system according to any one of claims 1 to 5, wherein a signal is generated and the first determination value is increased until the next unlocking.   The code generator determines the vibration duration of the transmitter from the output of the vibration detector, and makes the first signal transmission time different when the vibration duration is within a predetermined value and when it is not. The door lock control system according to any one of claims 1 to 6, wherein When the control unit determines that the code analysis unit is receiving the second signal, and the electric field strength determination unit determines that the signal is received with the electric field strength E equal to or higher than the second determination value, the door key An unlock signal is output to the mechanism as the operation command signal,
The code generator determines a vibration duration of the transmitter from the output of the vibration detector, and outputs a second signal instead of the first signal until the vibration duration reaches a predetermined value. The door lock control system according to any one of claims 1 to 7.

Images