JP2008267091A - Vehicular keyless entry system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erroneous registration of ID of the other potable machine, when registering ID of a portable machine in an on-vehicle machine, in a vehicular keyless entry system. <P>SOLUTION: The on-vehicle machine 200 determines strength of an output value of a transmission signal of the portable machine 100 by an output strength determining part 22A when registering the ID of the portable machine 100 received by a receiving part 220 in a storage part 212, and registers the ID of the portable machine 100 in the storage part 212 only when the output value is a predetermined value or more. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle keyless entry system.

  In general, when locking and unlocking a door of a vehicle, by pressing a request switch provided in the vicinity of the external door handle of the driver's side door, the vehicle is locked and unlocked without inserting a key into the key cylinder of the door. A keyless entry system has been put into practical use. In such a vehicle keyless entry system, when the request switch is operated, the vehicle-mounted device installed on the vehicle side is activated and transmits a request signal to the portable device (key) possessed by the occupant. The received portable device transmits a response signal including a unique ID assigned to each portable device, and the in-vehicle device collates the received response signal with the stored ID, and only when the ID matches, the door Are locked and unlocked (see Patent Document 1).

In such a vehicle keyless entry system, in order to further improve convenience, a vehicle keyless having a function of enabling a door to be locked and unlocked by remote control by turning a switch of the door to the portable device. An entry system has been put into practical use (see Patent Document 2).
JP 05-106376 A JP 08-144596 A

  By the way, in such a keyless entry system for a vehicle, a portable device is designed so that a specific vehicle-mounted device functions for a specific portable device, that is, a specific vehicle can be locked and unlocked only by a specific portable device. A registration operation for registering the unique ID assigned to each device on the vehicle-mounted device side is required. This registration operation is performed in a factory or the like before the vehicle passes over to the user. For example, when the vehicle's ignition key is operated to a predetermined position and the door lock knob of the driver's seat is operated from the unlocked position to the locked position, the ID transmitted from the portable device is registered on the in-vehicle device side. It is carried out by performing a predetermined operation, for example.

  However, when this registration operation is being performed between a certain pair of portable devices and an in-vehicle device (referred to as System A), another pair of portable devices and an in-vehicle device (referred to as System B) nearby. When the registration operation is performed between the system A and the in-vehicle device of the system A, the ID of the portable device of the system A may be registered and the ID of the portable device of the system B may be registered. Similarly, there is a possibility that the in-vehicle device of the system B registers the ID of the portable device of the system B and also registers the ID of the portable device of the system A. For this reason, there is a problem that the door can be locked and unlocked by a plurality of portable devices.

  In view of the above problems, the present invention realizes a vehicle keyless entry system that prevents erroneous registration of IDs of other portable devices when the ID of the portable device is registered in the in-vehicle device.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with an electronically registered unique identification code, and transmits an operation signal for performing a locking / unlocking operation of a vehicle door together with the identification code. And a vehicle-mounted device that controls locking and unlocking of the door of the vehicle only when the identification code included in the operation signal matches a previously registered identification code when the operation signal is received. In the vehicle keyless entry system, the in-vehicle device registers the identification code only when an output value of a transmission signal from the portable device is a predetermined value or more when registering the identification code. It is characterized by.

  The invention described in claim 2 is a portable device carried by an occupant and the portable device installed in the vehicle and electronically registered when a request switch installed outside the vehicle body of the vehicle is operated. A request signal for requesting the portable device to transmit a response signal including a unique identification code of the device is transmitted and registered in advance when the response signal transmitted from the portable device that has received the request signal is received. A vehicle-less keyless entry comprising: an in-vehicle device that collates the identified code with the identification code included in the response signal, and locks or unlocks the vehicle door lock only when the collation is established In the system, the in-vehicle device includes a determination unit that determines an intensity of an output value of a transmission signal from the portable device, and the transmission signal from the portable device is registered when the identification code is registered. The output value is characterized by performing the registration of the identification code only when more than a predetermined value.

  According to a third aspect of the present invention, there is provided an operation switch for operating a door lock of the vehicle, and includes a unique identification code electronically registered when the operation switch is operated. A portable device that transmits an operation signal instructing locking or unlocking of the door lock, and an identification code that is installed in the vehicle and received in advance when the operation signal is received and the identification included in the operation signal The code is collated and only when the collation is established, the door lock is controlled to be locked or unlocked, and when the request switch installed outside the vehicle body is operated, the unique identification is performed. When transmitting a request signal for requesting the portable device to transmit a response signal including a code and receiving the response signal transmitted from the portable device that has received the request signal, A vehicle keyless comprising: an in-vehicle device that collates the recorded identification code with the identification code included in the response signal, and locks or unlocks the door lock of the vehicle only when the collation is established In the entry system, the in-vehicle device includes a determination unit that determines an intensity of an output value of a transmission signal from the portable device, and outputs the transmission signal from the portable device when registering the identification code. The identification code is registered only when the value is equal to or greater than a predetermined value.

  When registering the ID of the portable device in the in-vehicle device, registration is performed when the output value of the transmission signal of the portable device is equal to or greater than a predetermined value, and erroneous registration of IDs of other portable devices can be prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a block diagram of an embodiment of the present invention.

  In the keyless entry system for a vehicle in the present embodiment, when the owner of the portable device 100 operates the request switch 240 provided in the vicinity of the external door handle of the vehicle (see FIG. 3), the operation provided in the portable device 100 is performed. When the switch 140 is operated (see FIG. 4), the portable device 100 and the vehicle-mounted device 200 communicate with each other, and the vehicle door is locked when the ID of the portable device matches the ID registered in the vehicle-mounted device 200. Alternatively, unlocking is performed.

  The portable device 100 includes a control unit 110, a reception unit 120 having a reception antenna 121, a transmission unit 130 having a transmission antenna 131, and an operation switch 140.

  The control unit 110 controls an operation performed by the portable device 100 in accordance with an operation of an operation switch 140 (described later) and in response to a signal transmitted from the in-vehicle device 200 (control will be described later).

  The receiving unit 120 receives a signal transmitted from the in-vehicle device 200 by the receiving antenna 121, performs signal processing, and outputs a signal to the control unit 110.

  The transmission unit 130 transmits the signal output from the control unit 110 to the in-vehicle device 200 through the transmission antenna 131.

  The operation switch 140 includes a door locking switch 141 that locks the door of the vehicle, and a door unlocking switch 142 that unlocks the door.

  The in-vehicle device 200 is installed inside an instrument panel (not shown) of the vehicle, communicates with the portable device 100, and controls the operation of the door lock actuator 300 installed inside each seat door, Lock and unlock the door.

  The in-vehicle device 200 includes a control unit 210, a reception unit 220 having a reception antenna 221, a transmission unit 230 having an indoor antenna 231A and an outdoor antenna 231B. Further, it is electrically connected to a request switch 240 that is mounted near the external door handle (not shown) of the driver side door. Furthermore, it is electrically connected to a door lock actuator 300 that drives a door lock mechanism (not shown) that locks and unlocks the door lock of each seat door.

  The control unit 210 controls the door lock actuator 300 according to a signal transmitted from the portable device 100 and according to a signal from the request switch 240 to lock and unlock the door. In addition, the ID of the portable device is registered by a predetermined operation (described later).

  The receiving unit 220 receives the signal transmitted from the portable device 100 by the receiving antenna 221, performs signal processing, and outputs the signal to the control unit 210.

  The transmitter 230 transmits signals to the portable device 100 from the indoor antenna 231A and the outdoor antenna 231B. Here, the indoor antenna 231A is installed inside the driver's seat side door, and the antenna characteristics are set so that communication with the portable device 100 is possible in the vehicle interior. The outdoor antenna 231B is installed inside the driver's seat side door, and the antenna characteristics are set so that communication with the portable device 100 is possible within a predetermined range outside the vehicle.

  FIG. 2 shows a detailed block diagram of the control unit 210 and the receiving unit 220.

  The receiving unit 220 includes a receiving antenna 221, a high frequency filter 222 (described as RF filter 222 in FIG. 4), a high frequency amplifying unit 223 (described as RF amplifying unit 223 in FIG. 4), a local oscillator 224A, and a mixer 224B. Frequency converter 224, intermediate frequency filter 225 (described as IF filter 225 in FIG. 4), intermediate frequency amplifier 226 (described as IF amplifier 226 in FIG. 4), detector 227, and low-pass filter 228 (in FIG. 2, LP filter) 228), a comparison unit 229, and an output intensity determination unit 22A.

  The broadcast signal received by the receiving antenna 221 is input to the high frequency filter 222, an unnecessary frequency band is cut, and output as an RF signal.

  The output RF signal is input to the high frequency amplifier 223, subjected to predetermined signal amplification, and output as an RF signal.

  The output RF signal is input to the mixer 224B provided in the frequency converter 224. The mixer 224B also receives a predetermined oscillation signal output from the local oscillator 224A included in the frequency converter 224, and the mixer 224B performs frequency conversion of the RF signal based on the oscillation signal (so-called intermediate frequency conversion). Output as IF signal.

  The output IF signal is input to the intermediate frequency filter 225, and an unnecessary noise signal generated by frequency conversion is cut and output as an IF signal.

  The output IF signal is input to the intermediate frequency amplification unit 226, subjected to predetermined signal amplification, and output as an IF signal.

  The output IF signal is input to the detection unit 227 for detection, and a necessary signal is extracted and output. Further, the output IF signal is input to the output strength determination unit 22A, and it is determined whether or not the output signal strength is equal to or greater than a predetermined value. When the output signal strength is a predetermined value or more, the output strength determination unit 22A outputs an ID registration trigger signal as a trigger signal for the control unit 210 to perform ID registration.

  The output IF signal is input to the low-pass filter 228, unnecessary harmonics are cut, and output as an IF signal.

  The output IF signal is input to the comparison unit 229 and compared with a predetermined voltage to stabilize the signal and output as a stable received signal.

  The output received signal is input to the control unit main body 211 and necessary signal processing is performed, and an ID is extracted from the received signal. The control unit body 211 writes this ID in the storage unit 212 only when an ID registration trigger signal is input from the output intensity determination unit 22A. As the storage unit 212, an erasable and writable nonvolatile memory such as an EEPROM is used.

  Next, the keyless entry operation of this embodiment will be described with reference to the flowcharts of FIGS.

  In the present embodiment, the holder of the portable device 100 operates the request switch 240 provided in the vicinity of the external door handle of the vehicle (see FIG. 3), and the user operates the operation switch 140 of the portable device 100 (FIG. 4). When the portable device 100 and the in-vehicle device 200 communicate with each other and a predetermined condition is satisfied (ID authentication described later), the in-vehicle device 200 locks or unlocks the door lock.

  FIG. 5 shows a flowchart of the operation of the portable device 100.

  In step S101, the portable device 100 is in a standby state in which a request signal (described later) from the in-vehicle device 200 can be received.

  In step S102, it is determined whether or not the operation switch 140 (described as operation SW in FIG. 5) of the portable device 100 is operated, that is, whether or not the door locking switch 141 or the door unlocking switch 142 is operated. When the door locking switch 141 or the door unlocking switch 142 is turned on, the flow moves to step S103. On the other hand, when both the door locking switch 141 or the door unlocking switch 142 are OFF, the flow proceeds to step S105.

  In step S <b> 103, the control unit 110 performs confirmation of the unique ID of the portable device 100 recorded in the control unit 110 and data encryption processing necessary for signal transmission. After this, the flow moves to step S104.

  In step S <b> 104, a remote operation signal is transmitted from the portable device 100. The remote operation signal is a signal that causes the in-vehicle device 200 to lock or unlock the door lock, includes a unique ID of the portable device 100, and is transmitted from the transmission antenna 131. After this, the flow moves to step S108.

  In step S105, it is determined whether the portable device 100 has received a request signal from the in-vehicle device 200. The request signal is transmitted from the in-vehicle device 200 when the request switch 240 provided near the external door handle of the driver's seat side door of the vehicle is pressed. When the portable device 100 receives a request signal from the in-vehicle device 200, the flow moves to step S106. On the other hand, when the portable device 100 has not received the request signal from the in-vehicle device 200, the flow returns to step S101.

  In step S <b> 106, the control unit 110 performs confirmation of the vehicle ID included in the request signal and data encryption processing necessary for transmitting the response signal. Each portable device 100 stores a unique vehicle ID assigned to a vehicle corresponding to each portable device 100, and the vehicle ID included in the request signal is stored in the control unit 110. A check is made to see if they match. After this, the flow moves to step S107.

  In step S <b> 107, a response signal including the unique ID of the portable device 100 is transmitted from the transmission antenna 131 of the portable device 100. After this, the flow moves to step S108.

  In step S108, a series of operations of portable device 100 ends.

  In FIG. 6, the flowchart of operation | movement of the vehicle equipment 200 is shown.

  In step S <b> 201, the in-vehicle device 200 is in a standby state for receiving a signal from the request switch 240 provided near the external door handle of the driver's seat side door or a remote operation signal from the portable device 100.

  In step S202, it is determined whether or not a remote operation signal is received from the portable device 100. When the remote operation signal is received from the portable device 100, the flow moves to step S203. On the other hand, when the remote operation signal from the portable device 100 is not received, the flow proceeds to step S206.

  In step S <b> 203, the control unit 210 performs verification of the ID of the portable device 100 included in the received remote operation signal and data encryption necessary for signal processing. After this, the flow moves to step S204.

  In step S204, the collation result of the portable device 100 ID is determined. If the ID of the portable device 100 matches the ID stored in advance in the storage unit 212, the flow moves to step S205. On the other hand, if the ID of the portable device 100 does not match the ID stored in advance in the storage unit 212, the flow returns to step S201.

  In step S205, the in-vehicle device 200 locks or unlocks the door lock of the vehicle according to the remote operation signal. After this, the flow moves to step S211.

  In step S206, it is determined whether or not the request switch 240 provided in the vicinity of the external door handle of the driver side door of the vehicle is ON. If the request switch 240 is ON, that is, if the request switch 240 is operated, the flow moves to step S207. On the other hand, if the request switch 240 is OFF, that is, if the request switch 240 is not operated, the flow returns to step S201.

  In step S207, a request signal for requesting a response signal is transmitted from the in-vehicle device 200 to the portable device 100. The request signal includes an ID stored in advance in the storage unit 212. After this, the flow moves to step S208.

  In step S208, it is determined whether or not a response signal from the portable device 100 has been received within a predetermined time after transmitting the request signal. If a response signal is received from the portable device 100 within a predetermined time after transmitting the request signal, it means that the portable device 100 exists in the vicinity of the vehicle, and the flow moves to step S209. On the other hand, if the response signal from the portable device 100 is not received within a predetermined time after the transmission of the request signal, it means that communication with the portable device 100 is not successful, and the flow proceeds to step S211. To do.

  In step S <b> 209, the control unit 210 performs verification of the ID of the portable device 100 included in the response signal transmitted from the portable device 100 and data encryption processing necessary for signal processing. Each individual portable device 100 stores a unique ID assigned to each portable device 100, and whether or not the ID included in the received response signal matches the ID stored in advance in the storage unit 212. Is confirmed. After this, the flow moves to step S210.

  In step S210, the collation result of the portable device ID of the portable device 100 is determined. If the ID included in the received response signal matches the ID stored in advance in the storage unit 212, the flow moves to step S205. On the other hand, if the ID included in the received response signal does not match the ID stored in advance in the storage unit 212, the flow proceeds to step S211.

  In step S211, a series of operations of the in-vehicle device 200 ends.

  Next, the ID registration process of the portable device 100 by the in-vehicle device 200 will be described with reference to the flowchart of FIG.

  In step S301, it is determined whether or not there is an operation for starting ID registration of the portable device. This operation is a predetermined operation and is set in advance, for example, the door lock of the driver's seat is changed from the locked state to the unlocked state with the ignition key inserted into the key cylinder. It is desirable that this operation be performed so that the passenger does not unintentionally perform this operation. If there is an operation for starting ID registration, the flow proceeds to step S302. On the other hand, if there is no operation for starting ID registration, the flow returns to step S301.

  In step S302, the control unit 210 starts registration of the ID of the portable device. After this, the flow moves to step S303.

  In step S303, it is determined whether or not the output value Vc of the intermediate frequency amplification unit 226 is greater than or equal to a predetermined value Vs set in advance. When performing ID registration of the portable device 100 in a situation where a plurality of vehicle keyless entry systems exist within a certain range, the position of the portable device 100 that performs registration is closest to the in-vehicle device 200 that registers the ID of the portable device 100 It is considered that the output intensity of the signal received from the portable device 100 is the highest. Therefore, a threshold value Vs that does not reach the output value of the portable device of another vehicle keyless entry system is set, and whether or not the ID registration of the portable device 100 is performed depending on whether or not there is an output equal to or higher than the threshold value Vs. By determining, it is possible to avoid erroneous registration of the ID of the portable device of another vehicle keyless entry system. The threshold value Vs can be easily set by setting the portable device 100 to a value in a state where the portable device 100 is within a predetermined distance from the in-vehicle device 200, for example. FIG. 8 is a graph showing the relationship between the intensity (output intensity) of the output value of the signal received from the portable device and the ID registration implementation. If the output value Vc of the intermediate frequency amplifying unit 226 is greater than or equal to the predetermined value Vs set in advance, the flow moves to step S304. On the other hand, when the output value Vc of the intermediate frequency amplification unit 226 is less than the predetermined value Vs set in advance, the flow proceeds to step S305.

  In step S304, it is determined that the received ID is from the portable device 100 that registers the ID, and the ID received by the control unit main body 211 is written in the storage unit 212 to register the ID. After this, the flow moves to step S306.

  In step S305, it is determined that the received ID is not from the portable device 100 that registers the ID, and the ID is not registered. After this, the flow moves to step S306.

  In step S306, the ID registration process of the portable device 100 by the in-vehicle device 200 ends.

  As described above, in the vehicle keyless entry system according to the embodiment of the present invention, when the portable device ID is registered in the in-vehicle device, the registration is performed when the output value of the transmission signal of the portable device is equal to or greater than the predetermined value. Thus, erroneous registration of IDs of other portable devices can be prevented.

  As mentioned above, although the Example of this invention was explained in full detail with drawing, an Example is only an illustration of this invention and this invention is not limited only to the structure of an Example. Accordingly, it goes without saying that design changes and the like within a scope not departing from the gist of the present invention are included in the present invention.

  For example, the block diagrams of the portable device 100 and the in-vehicle device 200 are examples, and other configurations may be provided as long as the operations described above are performed.

It is a block diagram of an embodiment of the present invention. It is a detailed block diagram of the receiving part in embodiment of this invention. In embodiment of this invention, it is a figure which shows the state at the time of request switch operation. In embodiment of this invention, it is a figure which shows the state at the time of remote control. It is a flowchart which shows the operation | movement flow of the portable device in embodiment of this invention. It is a flowchart which shows the operation | movement flow of the vehicle equipment in embodiment of this invention. It is a flowchart which shows the operation | movement flow of ID registration in embodiment of this invention. It is explanatory drawing of ID registration in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Portable device 110 Control part 120 Reception part 121 Reception antenna 130 Transmission part 131 Transmission antenna 140 Operation switch 141 Door locking switch 142 Door unlocking switch 200 In-vehicle apparatus 210 Control part 211 Control part main body 212 Storage part 220 Reception part 221 Reception antenna 222 High-frequency filter 223 High-frequency amplification unit 224 Frequency conversion unit 224A Local oscillator 224B Mixer 225 Intermediate frequency filter 226 Intermediate frequency amplification unit 227 Detection unit 228 Low-pass filter 229 Comparison unit 22A Output intensity determination unit 240 Request switch 300 Door lock actuator

Claims (3)

A portable device having an electronically registered unique identification code and transmitting an operation signal for locking and unlocking a vehicle door together with the identification code, and included in the operation signal when the operation signal is received A vehicle-less keyless entry system comprising: an in-vehicle device that controls locking / unlocking of the door of the vehicle only when the identification code matches a pre-registered identification code,
The on-vehicle device registers the identification code only when the output value of the transmission signal from the portable device is a predetermined value or more when registering the identification code. A portable device carried by the passenger,
When the request switch installed in the vehicle and outside the vehicle body of the vehicle is operated, the portable device is requested to transmit a response signal including an electronically registered unique identification code of the portable device. When the request signal is transmitted and the response signal transmitted from the portable device that has received the request signal is received, the identification code registered in advance and the identification code included in the response signal are collated, An in-vehicle device that locks or unlocks the door lock of the vehicle only when the verification is established, and a vehicle keyless entry system comprising:
The in-vehicle device includes a determination unit that determines the strength of the output value of the transmission signal from the portable device, and when the identification code is registered, the output value of the transmission signal from the portable device is greater than or equal to a predetermined value. The vehicle keyless entry system is characterized in that the identification code is registered only in the case. An operation switch for operating the door lock of the vehicle is provided, and when the operation switch is operated, an electronically registered unique identification code is included to instruct locking or unlocking of the door lock of the vehicle A portable device that transmits an operation signal;
When the operation signal is received and installed in the vehicle, the identification code registered in advance and the identification code included in the operation signal are collated, and the door lock is locked only when the collation is established. Or when controlling the unlocking and when a request switch installed outside the vehicle body of the vehicle is operated, a request signal for requesting the portable device to transmit a response signal including the unique identification code is transmitted, When the response signal transmitted from the portable device that has received the request signal is received, the identification code registered in advance is compared with the identification code included in the response signal, and the verification is established An in-vehicle device that locks or unlocks the vehicle door lock only, and a vehicle keyless entry system,
The in-vehicle device includes a determination unit that determines the strength of the output value of the transmission signal from the portable device, and when the identification code is registered, the output value of the transmission signal from the portable device is greater than or equal to a predetermined value. The vehicle keyless entry system is characterized in that the identification code is registered only in the case.

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