JP2010077603A - Vehicle control system and wrist watch radio mobile key used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle control system which can reduce the consumption of the battery of a wrist watch radio mobile key and does not have a tendency to receive radio skimming. <P>SOLUTION: A wrist watch side radio transmitting/receiving part which wirelessly communicate with vehicle side radio transmitter and receiver 21T, 22R includes a batteryless passive excitation radio transmission circuit 40 electrically separated from a battery watch drive circuit 400 for driving the operation of the watch. The power of the batteryless passive excitation radio transmission circuit 40 is passively excited by receiving a radio WR for power excitation from the vehicle side radio transmitter/receiver 21T, 22R through a watch side antenna 41. Using the power, an identification code data radio WD used for the collation of code is transmitted to the vehicle side radio transmitter/receiver 21T, 22R. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle control system and a wristwatch type wireless portable key used therefor.

JP 2007-292689 A JP 2006-191525 A JP 2006-50522 A JP-A-2005-65151 Japanese Patent Laid-Open No. 8-120992

  In recent years, ID authentication is performed by wireless communication with a wireless electronic key (also referred to as a portable device) carried by a user, and further, locking / unlocking of a door lock, engine starting, etc. according to a command from the portable device An electronic key system (also referred to as a smart entry method or the like) that can control the above is widely used. As a part of the multi-functionalization of the wireless electronic key described above, various configurations of a wristwatch-type wireless portable key in which the function of the wireless electronic key is incorporated in a wristwatch have been proposed (Patent Documents 1 to 5).

  By the way, the conventional wristwatch type wireless portable key incorporates a battery as a driving power source of the wristwatch, and uses the battery as a driving source of the wireless communication unit. Since the battery is driven, the transmission output of the wireless communication unit is relatively large, and a radio wave reach distance of about 10 to 100 m can be sufficiently secured.

However, the conventional wristwatch-type wireless portable key has the following drawbacks.
(1) The wireless communication unit on the wireless portable key side is always kept powered on in order to wait for a request radio wave from the vehicle side. As a result, battery consumption is more likely to proceed than when the watch is used alone, and when compared with a wireless key without a clock function, battery consumption is likely to proceed as much as the clock function is installed. As a result, there arises a problem that troubles that impede locking and unlocking of the door due to battery exhaustion become more frequent.
(2) At the time of authentication, identification code data (authentication ID), which is a kind of personal information, is exchanged wirelessly between the portable key and the vehicle side. Since the radio wave arrival distance at this time is relatively large as described above, radio wave skimming is possible even at a location slightly away from the vehicle, which may be a security concern.

  An object of the present invention is to provide a vehicle control system that reduces battery consumption of a wristwatch-type wireless portable key and is less susceptible to radio wave skimming, and a wristwatch-type wireless portable key used therefor.

Means for Solving the Problems and Effects of the Invention

Between the vehicle-side antenna unit provided in the vehicle and attached to the vehicle so as to be able to transmit and receive radio waves outside the vehicle compartment, and the vehicle-side wireless communication device via the vehicle-side antenna unit, the vehicle-side wireless communication device A vehicle-side wireless transceiver that performs wireless communication including transmission of electric power excitation radio waves to
A watch that constitutes an out-of-vehicle wireless communication device and that is attached to the watch so as to be able to transmit and receive radio waves between the wristwatch body and wristband incorporating a battery-powered watch driving circuit and the vehicle-side wireless transceiver. The identification code data used for code verification is attached to the wristwatch in a form that separates the power supply from the side antenna and the battery-powered watch driving circuit, and is passively excited by receiving the power excitation radio wave via the watch side antenna. A battery-free passive excitation wireless transmission circuit that wirelessly transmits the excitation power to the vehicle-side wireless transceiver using the excitation power,
Vehicle control means that is attached to the vehicle and that performs vehicle control including door locking / unlocking control of the vehicle according to the result of collation of the identification code data received by the vehicle-side wireless transceiver.

The wristwatch type wireless portable key of the present invention is used in the vehicle control system of the present invention,
A watch that constitutes an out-of-vehicle wireless communication device and that is attached to the watch so as to be able to transmit and receive radio waves between the wristwatch body and wristband incorporating a battery-powered watch driving circuit and the vehicle-side wireless transceiver. The identification code data used for code verification is attached to the wristwatch in a form that separates the power supply from the side antenna and the battery-powered watch driving circuit, and is passively excited by receiving the power excitation radio wave via the watch side antenna. And a battery-less passive excitation wireless transmission circuit that wirelessly transmits the power to the vehicle-side wireless transceiver using the excitation power.

  According to the above configuration of the present invention, the wristwatch-side radio transmitter / receiver that communicates wirelessly with the vehicle-side radio transmitter / receiver is connected to the battery-powered watch driving circuit for driving the watch operation, and the battery-less passively excited radio with the power source separated. The transmitter circuit is configured to passively excite the batteryless passive excitation type wireless transmission circuit by receiving the electric wave for power excitation from the vehicle side wireless transceiver via the clock side antenna, and use the power. Thus, identification code data used for code verification is wirelessly transmitted to the vehicle-side wireless transceiver. Therefore, the wireless communication part on the wireless portable key side passively operates by exciting the power every time it receives a radio wave from the vehicle side, so it is not necessary to maintain the power receiving state for waiting for the radio wave, and the transmission operation of the identification code data Since the electric power required for the radio also uses radio wave excitation power, the watch-side battery is not consumed at all. Therefore, it is possible to effectively prevent a problem that hinders the locking and unlocking of the door due to battery exhaustion. In addition, if the antenna size (that is, inductance value) that can be incorporated into a wristwatch is taken into consideration when the vehicle-side radio wave output remains common-sense within the common-sense output range, the watch-side antenna is caused by external radio waves. The excitation power is relatively small and the radio wave arrival distance is at most 3 m or less (preferably 5 cm or more and 2 m or less, more preferably 10 cm or more and 1 m or less).

  The batteryless passive excitation type wireless transmission circuit can be constituted by an RF tag IC. In particular, when the communication frequency band is an RF band (for example, 13.56 MHz band), the antenna length of the watch-side antenna can be reduced, which is advantageous in reducing the size of the wristwatch-type wireless portable key.

  The vehicle-side antenna unit can be provided on a vehicle door. By providing a vehicle-side antenna on the door that the user who carries the watch inevitably approaches when getting into the car, even if the radio wave arrival distance is small as described above, wireless transmission and reception that is comfortable for the user is possible. Become. Since the user always touches the door knob when boarding the vehicle, if a vehicle-side antenna portion is provided in the vehicle body area around the door knob of the vehicle, more reliable wireless transmission / reception becomes possible. In particular, by providing the vehicle-side antenna section in the recessed area under the doorknob or in the area surrounding the key cylinder, it is easy to conceal the antenna mounting state, and the appearance of the corresponding part of the vehicle body can be improved.

  On the other hand, the vehicle-side antenna unit can be provided on the door mirror. The most frequent opening and closing operation for entering the vehicle is the door on the front seat (especially the driver's seat, then the passenger seat) where the door mirror is provided, and by providing the vehicle side antenna on the door mirror. Even though the communication distance is shortened, wireless communication can be performed more reliably. In addition, the vehicle-side antenna unit can be provided on a window glass (particularly, a side glass).

  The timepiece-side antenna can be a planar pattern antenna incorporated in the timepiece main body so that the antenna thickness direction coincides with the thickness direction of the timepiece main body. This contributes to the miniaturization and thinning of the watch body incorporating the antenna.

  The watch body can be configured as an analog timepiece having hands and a dial, but in this case, the dial area of the wristwatch is used as a radio wave emission surface, so that the watch dial side is used as the vehicle antenna. Smooth wireless communication is possible by holding it over. In this case, by incorporating a surface pattern antenna on the back side of the dial, the antenna can be concealed by the dial, which contributes to improving the appearance of the watch body. In this case, it is desirable that the dial is made of a non-conductive material (for example, plastics or ceramic material) so that the watch-side antenna is not shielded by radio waves.

  More specifically, a substrate on which a surface pattern antenna and an IC chip that forms a battery-less passive excitation wireless transmission circuit are mounted can be stacked on the back surface of the dial. By using the surface pattern antenna and the IC chip forming the batteryless passive excitation type radio transmission circuit as a board component different from the dial, the antenna and the IC chip can be easily assembled to the watch body. it can. Further, the appearance of the antenna and the IC chip is not affected on the front side of the dial.

  The watch body can be configured to have an opening for visually recognizing the surface of the dial and to have a metal main body casing disposed so as to surround the surface pattern antenna incorporated in the dial. . Thereby, the radio wave diffusion in the dial radial direction is suppressed by the metal main body casing, and the directivity of radio wave transmission / reception in the dial normal direction can be enhanced. The operation of making the dial close to the vehicle antenna portion is defined as a basic operation, and the communicable distance during the basic operation is set to be relatively small (for example, 5 cm to 50 cm), so that the vehicle antenna portion is attached. If the position is known (for example, the doorknob or its surrounding area), so-called code verification becomes possible when a basic operation for approaching the watch main body is performed aiming at the vehicle-side antenna, and the skimming suppression effect is further enhanced. .

  On the other hand, the watch-side antenna can be a planar pattern antenna incorporated in the wristband so that the antenna thickness direction coincides with the band thickness direction. By incorporating the watch-side antenna into the plane by utilizing the band-shaped wristband, the watch-side antenna can be eliminated from the watch body, and the watch body can be made smaller and thinner. The wristband may be made of a non-conductive material (for example, leather material, synthetic leather, flexible plastic material (for example, polyamide resin (trade name: nylon) or ABS resin)) so that the watch-side antenna is not shielded. desirable. In the present invention, since the battery-less passive excitation wireless transmission circuit is separated from the battery-powered clock driving circuit on the watch body side, the surface type pattern antenna is replaced with the battery-less passive excitation wireless transmission circuit. It can be easily incorporated into a wristband together with an IC chip formed. As a result, the function of the wireless portable device can be easily incorporated into the wristwatch without any design change on the watch body side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a conceptual diagram showing an example of an automobile control system of the present invention. FIG. 2 is a block diagram showing an example of the electrical configuration. The automobile control system 100 constitutes an automobile immobilizer. As shown in FIG. 1, the automobile control system 100 includes a wristwatch-type wireless portable key 4 carried by a user and a vehicle-side antenna unit 2 attached to the vehicle (automobile) 1 side. Have. As shown in FIG. 2, the vehicle-side antenna unit 2 is connected to an immobilizer ECU 3 that constitutes vehicle control means via vehicle-side wireless transceivers 21T and 22R.

  As shown in FIG. 2, the vehicle-side antenna unit 2 includes a pair of a transmitting antenna 21 and an immobilizer antenna 22, and as shown in FIGS. 1 and 4 (enlarged view), around the key cylinder KS below the door knob DN. In the area, it is attached to the door DR. Specifically, the radio wave passing part WC is formed by covering the periphery of the key cylinder KS with a resin which is a nonconductor and exposing the key cylinder KS to the surface of the door DR. The vehicle-side antenna unit 2 is mounted on the resin coating unit and can transmit and receive radio waves with the wristwatch-type wireless portable key 4 approaching the key cylinder KS via the radio wave passing unit WC.

  The transmitting antenna 21 is connected to a request radio wave transmitting circuit 21T that forms a vehicle-side radio transceiver. The request radio wave transmission circuit 21T includes a known oscillation circuit, amplification circuit, and impedance matching circuit (none of which is shown) for impedance matching of these circuits with the antenna 21. The request radio wave WR for detecting the approach of is periodically transmitted. This request radio wave functions as a power excitation radio wave that excites the batteryless passive excitation radio transmission circuit 40 mounted on the wristwatch type wireless portable key 4, and its communication frequency band is an RF band, for example, 3 It belongs to a short wave band of ˜30 MHz, and for example, among those defined in ISO / IEC 18000 as a frequency band for RF tag communication, a 13.56 MHz band (13.553 MHz to 13.567 MHz) may be adopted. it can.

  On the other hand, the immobilizer antenna 22 is connected to an identification code receiving circuit 22R that forms a vehicle-side radio transceiver. The identification code receiving circuit 22 includes an impedance matching circuit that performs impedance matching with the immobilizer antenna 22, an amplification circuit that amplifies the identification code data radio wave WD received from the wristwatch-type wireless portable key 4 via the immobilizer antenna 22, and reception after amplification. A demodulation circuit that removes a carrier wave component from the signal and extracts a baseband signal forming identification code data, a signal processing unit that converts the extracted baseband signal into a code pulse signal that can be recognized by the immobilizer ECU 3, and the like (both are well-known: (Not shown).

  The immobilizer ECU 3 is configured as a well-known computer hardware board including a CPU, a RAM, a ROM, an input / output interface and an internal bus connecting them, and the CPU executes a control program stored in the ROM so that the wristwatch type An unlocking / unlocking signal for permitting door locking / unlocking of the automobile 1 (FIG. 1) or an engine according to the result of collation of identification code data (hereinafter also referred to as ID data) with the wireless portable key 4 or the communication status Controls the output of a vibration permission signal or the like that permits starting.

  Specifically, the immobilizer ECU 3 compares the ID data transmitted from the wristwatch-type wireless portable key 4 with the reference ID data registered in advance in the ROM, and determines that the authentication is accepted when the two match. Otherwise, it is determined that authentication is rejected. And in the case of authentication acceptance, the unlock signal which commands unlocking (unlocking) to the door lock ECU which is not illustrated is output. In addition, the immobilizer is shifted to the immobilizer set state after the steering lock is released so that the engine can be started in accordance with a pressing operation of a push switch (not shown).

  On the other hand, when the distance between the wristwatch-type wireless portable key 4 and the vehicle-side antenna unit 2 is long and wireless transmission / reception between the two becomes impossible, or when the authentication is rejected, the immobilizer ECU 3 locks the door lock ECU. A lock signal for commanding (lock) is output. Further, the immobilizer is shifted to the immobilizer set and the steering lock state so that the engine cannot be started even when the push switch is pressed.

  The form of the immobilizer function is not limited to the above, and may be, for example, a type that prevents rotation of the key-mounted ignition knob or prevents insertion of the key (hereinafter, the immobilizer function activation processing is performed). Also collectively referred to as immobilization processing).

  Next, as shown in FIG. 3, the wristwatch-type wireless portable key 4 is mainly composed of a wristwatch including a watch body 401 and a wristband 402 in which a battery-powered watch driving circuit 400 is incorporated. The watch body 401 is configured as an analog watch having a hand 404 and a dial 403.

  As shown in FIG. 2, a known battery-powered timepiece driving circuit 400 is incorporated in the wristwatch. The battery type timepiece driving circuit 400 includes a timepiece main circuit 408, a stepping motor 411 for driving the pointer, and a mechanical unit (movement) 410 mainly including a gear mechanism for transmitting the rotation operation of the stepping motor 411 to the pointer 404. The watch main circuit 408 includes an oscillation circuit (crystal oscillation circuit or ceramic oscillation circuit) 408a and a frequency dividing circuit 408b that oscillates a time reference pulse signal, and a stepping motor 411 using a motor driving pulse output from the frequency dividing circuit 408b. The driving circuit (for example, logic sequencer) 408c and the like to be driven is driven using a battery (for example, a button battery) that is replaceably mounted in the watch body 401 as a power source.

  On the other hand, the wristwatch is attached to the wristwatch in such a manner that the watch-side antenna 41 attached to the wristwatch and the battery-powered watch driving circuit 400 are separated from each other so that radio transmission and reception with the vehicle-side wireless transceivers 21T and 22R is possible. Then, the power excitation radio wave WR is received via the clock side antenna 41 and passively excited, and the identification code data radio wave WD used for code verification is transmitted to the vehicle side radio transceivers 21T and 22R by the excitation power. A batteryless passive excitation type wireless transmission circuit 40 for transmission is provided.

  As shown in FIG. 4, the watch-side antenna 41 includes a surface pattern antenna (hereinafter referred to as the surface-type pattern antenna 4) incorporated in the watch body 401 such that the antenna thickness direction coincides with the thickness direction of the watch body 401. Also called). In the watch body 1, the area of the dial 403 is used as a radio wave input / output surface for the watch antenna 41. As a result, as shown in FIG. 5, smooth wireless communication is possible by holding the dial 403 side of the watch main body 401 of the wristwatch worn by the user on the arm WR with the wristband 402 over the vehicle-side antenna unit 2. .

  As shown in FIG. 4, the surface pattern antenna 41 is incorporated on the back side of the dial 403. The dial 403 is made of a non-conductive material (for example, plastics or ceramic material) so that the antenna is not shielded against radio waves. Specifically, the watch body 401 is formed with an opening (a transparent hood 406 made of glass or resin is fitted) for visually recognizing the surface of the dial 403 and is incorporated in the dial 403. A metal main body housing 405 is disposed so as to surround the surface pattern antenna 41, and the surface pattern antenna 41 and the battery-less type are provided on the back side of the dial 403 in the main body housing 405. A substrate 407 on which the IC chip 40 that forms the passive excitation type wireless transmission circuit 40 is mounted is disposed. On the back surface side of the substrate 407, the above-described battery-powered timepiece driving circuit 40, that is, the timepiece main circuit 40, the stepping motor 411, the mechanical unit 410, and the battery 409 are overlaid, and further fitted into the back surface opening of the main body housing 405. The back cover 420 is sealed.

  As shown in FIG. 2, in this embodiment, the watch-side antenna 41 constitutes a loop-type resonant antenna together with a capacitor 42 connected in parallel thereto. Specifically, as shown in FIG. 4, the surface pattern antenna 41 is formed on one main surface of the substrate 407 with a metal conductor foil. Then, one of the antenna lead portions 42l and 42l formed at both ends of the surface pattern antenna 41 is guided to the antenna mounting side main surface of the substrate 407 through the via 42v. Capacitor electrodes 42e and 42e are formed so as to conduct to the antenna lead portions 42l and 42l. By adopting the above-mentioned RF band (for example, 13.56 Z MHz band) as the communication frequency band, the antenna length of the watch-side antenna 41 that is pattern-mounted on the substrate 407 can be significantly reduced.

  As shown in FIG. 2, the watch-side antenna 41 generates an AC induced electromotive force by electromagnetic induction as it receives the request radio wave. The batteryless passive excitation type radio transmission circuit 40 uses the AC induced electromotive force to transmit the above-described ID code radio wave for code verification to the immobility antenna 22 on the vehicle side via the clock side antenna 41. The rectifier circuit 43, the data memory, the CPU 45, the modulation circuit 46 and the like are configured as a one-chip RF tag IC.

  The rectifier circuit 43 rectifies the AC induced electromotive force generated in the timepiece-side antenna 41 and supplies a DC power supply voltage to the CPU 45, the modulation circuit 46, and the like. The data memory 44 stores the aforementioned ID code. Then, the CPU 45 operates by receiving the power supply voltage from the rectifier circuit, reads out the ID code data from the data memory 44, and uses the reflected wave of the request signal radio wave at the timepiece side antenna 41 as a carrier wave, to obtain the above ID code data. The baseband signal is transmitted to the immobilizer antenna 22 on the vehicle side while being modulated by the modulation circuit 46 described above.

  Hereinafter, the operation of the automobile control system 100 will be described with reference to the flowchart of FIG. In S1, a request radio wave is output from the transmitting antenna 21 for a fixed time every fixed period. In S2, if the request radio wave is received on the timepiece side antenna 41 side, the process proceeds to S3, and the CPU 45 of the batteryless passive excitation type radio transmission circuit 40 is activated by the induced electromotive force. In S <b> 4, the radio wave carrying the ID code is transmitted from the wristwatch-type wireless portable key 4 to the immobilizer antenna 22. On the immobilizer ECU 3 side, the ID code is received in S5, and the above-described code verification is performed in S6. If the result of the collation in S7 is that the authentication is accepted, the process proceeds to S8 and becomes an immobilian set.

  According to the embodiment of the present invention, as shown in FIG. 2, the battery-less passive excitation wireless transmission is performed by receiving the power excitation radio wave WR from the vehicle-side wireless transceivers 21T and 22R via the clock-side antenna 41. The circuit 40 is passively excited with power, and the ID code data radio wave WD used for code verification is transmitted to the vehicle-side radio transceivers 21T and 22R using the power. Therefore, the wireless communication unit on the wristwatch-type wireless portable key 4 side is passively operated by exciting the power every time it receives a radio wave from the vehicle side. Since the power required for the transmission operation also uses radio wave excitation power, the watch battery is not consumed at all. Accordingly, it is possible to effectively prevent problems that hinder door locking / unlocking and engine starting due to battery exhaustion.

  Considering the antenna size (that is, the inductance value) that can be incorporated into a wristwatch, the excitation power generated in the watch-side antenna 41 by external radio waves is relatively small, and the radio wave arrival distance is at most 3 m or less (preferably 5 cm or more and 2 m or less, More preferably, it is not less than 10 cm and not more than 1 m, so that it is difficult to receive radio wave skimming. In particular, as shown in FIG. 5, if the sensitivity is adjusted so that radio wave communication is not performed until a short distance of 5 cm to 50 cm, the effect is further enhanced.

  In addition, according to the wristwatch-type wireless portable key 4 described above, radio wave diffusion in the radial direction of the dial 403 is suppressed by the metal main body housing 405, so that directivity of radio wave transmission / reception in the normal direction of the dial 403 is achieved. Has been increased. As shown in FIG. 5, the operation of bringing the dial 403 close to the vehicle antenna 2 is defined as a basic operation, and the communicable distance during the basic operation is set to be small as described above. By collating the timepiece main body 401 with the vehicle side antenna section 2 below the DN, code verification is possible, and the skimming suppression effect is further enhanced.

  In addition, the vehicle side antenna part 2 can also be provided in the door mirror DM, as shown in FIG. Moreover, the vehicle side antenna part 2 can also be provided in a window glass (especially side glass SW).

  Further, as shown in FIG. 7, the watch-side antenna 41 may be a planar pattern antenna 41 incorporated in the wristband 402 so that the antenna thickness direction coincides with the band thickness direction. The watch-side antenna 41 can be eliminated from the watch body 401 by incorporating the watch-side antenna 41 in the plane by utilizing the band-shaped wristband 402, and the watch body 401 can be reduced in size and thickness. The wristband 402 is made of a non-conductive material (for example, leather material, synthetic leather, flexible plastic material (for example, polyamide resin (trade name: nylon) or ABS resin)) so that the watch-side antenna 41 is not shielded. . For example, in the configuration of FIG. 7, the clock-side antenna 41 and the IC chip forming the battery-less passive excitation type wireless transmission circuit 40 are embedded and integrated in a resin wristband 404 by insert molding.

  Since the battery-less passive excitation wireless transmission circuit 40 is separated from the battery-powered clock driving circuit on the watch body 401 side, the battery-less passive excitation wireless transmission circuit 40 in the wristband 402 is The signal wiring to the watch body 401 side is not routed, and the circuit configuration is completed within the wristband 402.

  Note that other frequency bands defined in ISO / IEC 18000, such as a 135 kHz band, a 900 MHz band, or a 2.45 GHz band, may be employed as the RF tag communication frequency band. However, when the LF band such as the 135 kHz band is adopted, it is necessary to replace the watch-side antenna 42 with a wound coil antenna. In this case, the watch-side antenna 42 is preferably incorporated in the watch body 401.

  In this embodiment, the timepiece body is configured as an analog timepiece. However, it is of course possible to configure the timepiece body as a known digital timepiece.

The conceptual diagram which shows an example of the motor vehicle control system of this invention. The block diagram which shows an example of the electrical constitution of the motor vehicle control system of FIG. FIG. 2 is an external perspective view of a wristwatch type wireless portable key used in the automobile control system of FIG. 1. Explanatory drawing which shows the cross-sectional structure of the wristwatch type | mold radio | wireless portable key of FIG. 3 with the planar form of the board | substrate with which a clock side antenna is mounted. The schematic diagram which shows the usage condition of the timepiece type | mold radio | wireless portable key of FIG. The flowchart which shows the operation | movement process flow of the motor vehicle control system of FIG. The figure which shows the deformation | transformation aspect of the mounting form of a timepiece side antenna.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Vehicle side antenna part 3 Immobilizer ECU (vehicle control means)
4 Wristwatch-type wireless portable key 21T, 22R Vehicle-side wireless transmitter / receiver 40 Battery-less passive excitation wireless transmitter circuit (RF tag IC)
41 Clock side antenna (surface pattern antenna)
400 battery-powered timepiece drive circuit 401 watch body 402 wristband 403 dial 404 pointer 405 body housing 407 substrate

Claims (11)

Wireless communication between the vehicle-side antenna unit provided on the vehicle and mounted on the vehicle so as to be able to transmit and receive radio waves outside the vehicle compartment, and the vehicle-side wireless communication device via the vehicle-side antenna unit. A vehicle-side wireless transceiver that performs wireless communication including transmission of power excitation radio waves to a communication device;
The external wireless communication device is configured to be attached to the wristwatch so that radio waves can be transmitted / received between the wristwatch including a battery-powered timepiece driving circuit and a wristband, and the vehicle-side wireless transceiver. The watch-side antenna and the battery-powered watch driving circuit are attached to the wristwatch in a power-separated form, receive the power excitation radio wave via the watch-side antenna and passively power-excited, A wristwatch-type wireless portable key comprising: a battery-less passive excitation wireless transmission circuit that wirelessly transmits identification code data used for code verification to the vehicle-side wireless transceiver using the excitation power;
Vehicle control means attached to the vehicle and performing vehicle control including door locking / unlocking control of the vehicle according to a result of collation of the identification code data received by the vehicle-side wireless transceiver;
A vehicle control system comprising:   2. The vehicle control system according to claim 1, wherein the timepiece-side antenna is a surface pattern antenna incorporated in the timepiece main body so that the antenna thickness direction coincides with the thickness direction of the timepiece main body.   3. The vehicle control system according to claim 2, wherein the timepiece main body is configured as an analog timepiece having hands and a dial, and the surface pattern antenna is incorporated on the back side of the dial made of a non-conductive material.   The vehicle control system according to claim 3, wherein a substrate on which the surface pattern antenna and the IC chip forming the batteryless passive excitation type wireless transmission circuit are mounted is laminated on the back surface of the dial.   The timepiece main body has a metal main body housing formed with an opening for visually recognizing the surface of the dial and disposed so as to surround the planar pattern antenna incorporated in the dial. The vehicle control system according to any one of claims 3 to 4.   2. The vehicle control system according to claim 1, wherein the timepiece-side antenna is a planar pattern antenna incorporated in the wristband so that an antenna thickness direction coincides with the band thickness direction.   The vehicle control system according to claim 6, wherein the planar pattern antenna and an IC chip forming the batteryless passive excitation type wireless transmission circuit are incorporated in the wristband.   The vehicle control system according to claim 7, wherein the wristband is made of a nonconductive material.   The vehicle control system according to any one of claims 1 to 8, wherein the battery-less passive excitation wireless transmission circuit is configured by an RF tag IC.   The vehicle control according to any one of claims 1 to 9, wherein the vehicle-side antenna unit is provided in any one of a vehicle body region, a door mirror, and a window glass that form a periphery of the door knob of the vehicle. system. It is used for the vehicle control system according to any one of claims 1 to 10,
The external wireless communication device is configured to be attached to the wristwatch so that radio waves can be transmitted and received between the wristwatch body including a battery-powered timepiece driving circuit and a wristband, and the vehicle-side wireless transceiver. The watch-side antenna and the battery-powered watch driving circuit are attached to the wristwatch in a power-separated form, receive the power excitation radio wave via the watch-side antenna and passively power-excited, A wristwatch-type wireless portable key comprising: a batteryless passive excitation wireless transmission circuit that wirelessly transmits identification code data used for code verification to the vehicle-side wireless transceiver using the excitation power.

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