JP2022003318A - Position determination system - Google Patents

Position determination system Download PDF

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Publication number
JP2022003318A
JP2022003318A JP2020107998A JP2020107998A JP2022003318A JP 2022003318 A JP2022003318 A JP 2022003318A JP 2020107998 A JP2020107998 A JP 2020107998A JP 2020107998 A JP2020107998 A JP 2020107998A JP 2022003318 A JP2022003318 A JP 2022003318A
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Prior art keywords
vehicle
terminal
received signal
communication unit
signal strength
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Japanese (ja)
Inventor
正則 小杉
Masanori Kosugi
義規 加藤
Yoshinori Kato
浩紀 岩井
Hironori Iwai
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Suzuki Motor Corp
Tokai Rika Co Ltd
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Suzuki Motor Corp
Tokai Rika Co Ltd
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Priority to JP2020107998A priority Critical patent/JP2022003318A/en
Priority to DE102021115941.5A priority patent/DE102021115941A1/en
Publication of JP2022003318A publication Critical patent/JP2022003318A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20—Means to switch the anti-theft system on or off
    • B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
    • B60R25/245—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user where the antenna reception area plays a role
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0284—Relative positioning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S2205/01—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations specially adapted for specific applications
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C2209/00—Indexing scheme relating to groups G07C9/00 - G07C9/38
    • G07C2209/60—Indexing scheme relating to groups G07C9/00174 - G07C9/00944
    • G07C2209/63—Comprising locating means for detecting the position of the data carrier, i.e. within the vehicle or within a certain distance from the vehicle

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Lock And Its Accessories (AREA)

Abstract

To provide a position determination system configured to be capable of correctly determining a position of a terminal.SOLUTION: On a vehicle 1, there are provided outdoor communication units 16 disposed outside an interior of the vehicle 1 and an indoor communication unit 17 disposed inside the interior. A position determination system 30 comprises a data acquisition unit 33 that acquires received signal strength data of received signal strength measured such that radio waves are communicated between the outdoor communication units 16 and a terminal 2 and between the indoor communication unit 17 and the terminal 2, respectively. Moreover, the position determination system 30 comprises a position determination unit 31 that determines whether the terminal 2 is positioned outside or inside an interior of the vehicle 1 on the basis of a result from a comparison between the two pieces of received signal strength data obtained by each of the communications between the outdoor communication units 16 and the terminal 2 and between the indoor communication unit 17 and the terminal 2. Further, the outdoor communication units 16 are arranged inside front fenders of the vehicle 1.SELECTED DRAWING: Figure 1

Description

本発明は、端末が車両と通信する際に、車両に対する端末の位置を判定する位置判定システムに関する。 The present invention relates to a position determination system that determines the position of a terminal with respect to the vehicle when the terminal communicates with the vehicle.

従来、例えば車両において、ユーザに所持される端末と車両に搭載される車載機とが無線により通信接続して両者の間の無線通信が実行され、車両の制御を行う通信システムが知られている。通信システムとしては、車載機からの送信電波に端末が自動で応答して無線通信によりＩＤ認証を行うスマート照合システムが周知である。 Conventionally, for example, in a vehicle, a communication system is known in which a terminal possessed by a user and an in-vehicle device mounted on the vehicle are wirelessly connected to each other to perform wireless communication between the two to control the vehicle. .. As a communication system, a smart collation system in which a terminal automatically responds to a radio wave transmitted from an in-vehicle device and performs ID authentication by wireless communication is well known.

特許文献１には、車両に対する端末の位置を判定する位置判定システムを備えたスマート照合システムが開示されている。この位置判定システムでは、車載機と端末とが通信接続した場合、車両に搭載された通信部から送信された電波を端末が受信したときの受信信号強度を測定し、この受信信号強度が整合する位置を、端末の位置として判定する。スマート照合システムでは、位置判定システムによって端末が車両の近傍に位置するか否かが判定される。 Patent Document 1 discloses a smart collation system including a position determination system for determining the position of a terminal with respect to a vehicle. In this position determination system, when the in-vehicle device and the terminal are connected by communication, the received signal strength when the terminal receives the radio wave transmitted from the communication unit mounted on the vehicle is measured, and the received signal strength is matched. The position is determined as the position of the terminal. In the smart collation system, the position determination system determines whether or not the terminal is located near the vehicle.

米国特許出願公開第２０１５／０２３５４８６号明細書U.S. Patent Application Publication No. 2015/0235486

ところで、通信部は、車両外部に露出しないように、車両の内部に収納される。そのため、通信部から送信された電波が車両の外郭を形成する金属製のボディ部品に遮蔽されて、車両外部に位置する端末が受信する電波の受信信号強度が低下することがあった。これにより、端末の位置を正しく判定できないという問題があった。 By the way, the communication unit is housed inside the vehicle so as not to be exposed to the outside of the vehicle. Therefore, the radio wave transmitted from the communication unit may be shielded by the metal body component forming the outer shell of the vehicle, and the reception signal strength of the radio wave received by the terminal located outside the vehicle may be lowered. As a result, there is a problem that the position of the terminal cannot be correctly determined.

本発明の目的は、端末の位置を正しく判定可能にした位置判定システムを提供することにある。 An object of the present invention is to provide a position determination system capable of correctly determining the position of a terminal.

上記課題を解決するための位置判定システムは、車両の室外に設けられた室外通信部と端末の間、及び前記車両の室内に設けられた室内通信部と前記端末との間の各々で、電波が通信されて受信信号強度が測定された場合に、これら前記受信信号強度の受信信号強度データを取得するデータ取得部と、前記室外通信部及び前記端末の通信で得た前記受信信号強度データと、前記室内通信部及び前記端末の通信で得た前記受信信号強度データとの大小比較の結果から、前記端末が、前記車両の室外及び室内のどちらに位置するかを判定する位置判定部と、を備え、前記室外通信部は、前記車両のフロントフェンダの内部に配置されている。 The position determination system for solving the above problems is a radio wave between the outdoor communication unit and the terminal provided outside the vehicle and between the indoor communication unit and the terminal provided inside the vehicle. When the received signal strength is measured by communication with the data acquisition unit, the data acquisition unit that acquires the received signal strength data of the received signal strength, and the received signal strength data obtained by the communication of the outdoor communication unit and the terminal. From the result of magnitude comparison with the received signal strength data obtained by the communication between the indoor communication unit and the terminal, a position determination unit for determining whether the terminal is located outdoors or indoors of the vehicle. The outdoor communication unit is arranged inside the front fender of the vehicle.

本発明の位置判定システムは、端末の位置を正しく判定可能にする。 The position determination system of the present invention makes it possible to correctly determine the position of the terminal.

一実施形態の認証システムに設けられた位置判定システムの構成を示すブロック図。The block diagram which shows the structure of the position determination system provided in the authentication system of one Embodiment. 車両の外観を示す斜視図。A perspective view showing the appearance of the vehicle. 室外通信部及び室内通信部の配置を示す上面図。Top view showing the arrangement of an outdoor communication unit and an indoor communication unit. 室外通信部及び室内通信部の配置を示す側面図。The side view which shows the arrangement of the outdoor communication part and the indoor communication part. 図４のＶ−Ｖ線断面図。FIG. 4 is a sectional view taken along line VV of FIG. 車両と携帯端末との認証の流れを示すフロー図。A flow chart showing the flow of authentication between a vehicle and a mobile terminal. 車両の室外に端末が位置する場合の電波の伝搬経路を示す上面図。Top view showing the propagation path of radio waves when the terminal is located outside the vehicle. 車両の室内に端末が位置する場合の電波の伝搬経路を示す上面図。Top view showing the propagation path of radio waves when the terminal is located in the interior of the vehicle. 室外通信部から送信される電波の伝搬経路を説明する説明図。Explanatory drawing explaining the propagation path of the radio wave transmitted from the outdoor communication part.

以下、位置判定システムの一実施形態を、図面を参照して説明する。
図１に示すように、車両１は、無線通信を通じて端末２の正否を認証する認証システム３を備えている。端末２は、電話機能を有し、近距離無線通信を用いて車両１と通信可能な高機能携帯電話、所謂スマートフォンであることが好ましい。本例の認証システム３は、車両１からの通信を契機に近距離無線通信によってＩＤ照合を実行する近距離無線照合システムである。近距離無線通信は、例えばブルートゥース（Bluetooth：登録商標）通信であることが好ましい。 Hereinafter, an embodiment of the position determination system will be described with reference to the drawings.
As shown in FIG. 1, the vehicle 1 is provided with an authentication system 3 that authenticates the correctness of the terminal 2 through wireless communication. The terminal 2 is preferably a high-performance mobile phone, a so-called smartphone, which has a telephone function and can communicate with the vehicle 1 by using short-range wireless communication. The authentication system 3 of this example is a short-range wireless verification system that executes ID verification by short-range wireless communication triggered by communication from the vehicle 1. The short-range wireless communication is preferably Bluetooth (Bluetooth: registered trademark) communication, for example.

車両１は、ＩＤ照合を行う照合ＥＣＵ（Electronic Control Unit）４と、車載電装品の電源を管理するボディＥＣＵ５、エンジン６を制御するエンジンＥＣＵ７とを備えている。これらＥＣＵは、車内の通信線８を通じて接続されている。通信線８は、例えばＣＡＮ（Controller Area network）やＬＩＮ（Local Interconnect network）からなる。 The vehicle 1 includes a collation ECU (Electronic Control Unit) 4 for ID collation, a body ECU 5 for managing the power supply of vehicle-mounted electrical components, and an engine ECU 7 for controlling the engine 6. These ECUs are connected through a communication line 8 in the vehicle. The communication line 8 is composed of, for example, CAN (Controller Area network) or LIN (Local Interconnect network).

照合ＥＣＵ４のメモリ９には、車両１に登録された端末２の電子キーＩＤ及びキー固有鍵が書き込み保存されている。認証システム３においては、照合ＥＣＵ４と端末２との間で自動的に相互通信による一連のＩＤ照合が実行され、そのＩＤ照合が成立したことを一条件としてドアロックの施解錠及びエンジンの始動が許可される。 The electronic key ID and key-specific key of the terminal 2 registered in the vehicle 1 are written and stored in the memory 9 of the collation ECU 4. In the authentication system 3, a series of ID collation by mutual communication is automatically executed between the collation ECU 4 and the terminal 2, and the door lock is locked / unlocked and the engine is started on condition that the ID collation is established. Allowed.

ボディＥＣＵ５は、車両ドア１０を施解錠するメカ部分としてのドアロック装置１１の作動を制御する。車両ドア１０には、車両ドア１０の開閉を操作するための車外ドアハンドル１２が設けられている。車外ドアハンドル１２には、例えばドア解錠するときのトリガとして車外ドアハンドル１２に対するユーザのタッチ操作を検出するタッチセンサ１３が設けられている。また、車外ドアハンドル１２には、例えばドア施錠するときに操作するロックボタン１４が設けられている。ボディＥＣＵ５は、ＩＤ照合が成立し、かつ車両１の室外に端末２が位置しているときに、タッチセンサ１３及びロックボタン１４の検出信号を基に、ドアロック装置１１の作動を制御する。 The body ECU 5 controls the operation of the door lock device 11 as a mechanical portion for locking and unlocking the vehicle door 10. The vehicle door 10 is provided with an outside door handle 12 for operating the opening and closing of the vehicle door 10. The vehicle exterior door handle 12 is provided with a touch sensor 13 that detects a user's touch operation on the vehicle exterior door handle 12, for example, as a trigger when unlocking the door. Further, the door handle 12 outside the vehicle is provided with a lock button 14 that is operated, for example, when the door is locked. The body ECU 5 controls the operation of the door lock device 11 based on the detection signals of the touch sensor 13 and the lock button 14 when the ID verification is established and the terminal 2 is located outside the vehicle 1.

エンジンＥＣＵ７は、車両１のエンジン６の作動を制御する。車両１には、エンジン６の電源遷移を操作するためのエンジンスイッチ１５が設けられている。エンジンスイッチ１５は、例えばプッシュ式のスイッチであることが好ましい。エンジンＥＣＵ７は、所定の条件下でエンジンスイッチ１５が操作されることでエンジン６の遷移を制御する。なお、ここでいう所定の条件とは、ＩＤ照合が成立していること、車両１の室内に端末２が位置していること、車両１のブレーキペダル（図示略）が踏まれていること、車両１のトランスミッションがパーキングレンジに入っていること、又はこれらの組み合わせが挙げられる。 The engine ECU 7 controls the operation of the engine 6 of the vehicle 1. The vehicle 1 is provided with an engine switch 15 for operating the power transition of the engine 6. The engine switch 15 is preferably a push type switch, for example. The engine ECU 7 controls the transition of the engine 6 by operating the engine switch 15 under predetermined conditions. The predetermined conditions referred to here are that the ID verification is established, that the terminal 2 is located in the room of the vehicle 1, and that the brake pedal (not shown) of the vehicle 1 is depressed. The transmission of vehicle 1 is in the parking range, or a combination thereof can be mentioned.

車両１は、端末２と近距離無線通信を行なうための室外通信部１６と室内通信部１７とを備えている。室外通信部１６は、車両１の室外側に設けられている。室内通信部１７は、車両１の室内側に設けられている。室外通信部１６及び室内通信部１７は、端末２とＢＬＥ（Bluetooth Low Energy）通信を行う。また、室外通信部１６及び室内通信部１７の各々は、固有の通信部ＩＤを有している。通信部ＩＤは、各通信部を識別するために用いられる。 The vehicle 1 includes an outdoor communication unit 16 and an indoor communication unit 17 for performing short-range wireless communication with the terminal 2. The outdoor communication unit 16 is provided on the outdoor side of the vehicle 1. The indoor communication unit 17 is provided on the indoor side of the vehicle 1. The outdoor communication unit 16 and the indoor communication unit 17 perform BLE (Bluetooth Low Energy) communication with the terminal 2. Further, each of the outdoor communication unit 16 and the indoor communication unit 17 has a unique communication unit ID. The communication unit ID is used to identify each communication unit.

本実施形態のＢＬＥ通信では、端末２側がマスタであり、車両１側がスレーブである。なお、マスタとスレーブの関係はこの限りではなく、車両１側がマスタで、端末２側がスレーブでもよい。室外通信部１６及び室内通信部１７は、車両１の近傍エリアに定期的にアドバタイズメッセージを送信する。 In the BLE communication of the present embodiment, the terminal 2 side is the master and the vehicle 1 side is the slave. The relationship between the master and the slave is not limited to this, and the vehicle 1 side may be the master and the terminal 2 side may be the slave. The outdoor communication unit 16 and the indoor communication unit 17 periodically transmit an advertisement message to an area in the vicinity of the vehicle 1.

端末２は、端末２の作動を制御する端末制御部２０と、端末２においてネットワーク通信を行なうネットワーク通信モジュール２１と、端末２においてＢＬＥ通信を行う端末通信部２２とを備えている。 The terminal 2 includes a terminal control unit 20 that controls the operation of the terminal 2, a network communication module 21 that performs network communication in the terminal 2, and a terminal communication unit 22 that performs BLE communication in the terminal 2.

端末２を車両１の電子キーとして使用するにあたり、端末２は、車両１に端末２の電子キーＩＤ及びキー固有鍵を登録する電子キー登録を行う。例えば、端末２は、ネットワーク通信を通じてサーバ（図示略）から電子キーＩＤ及びキー固有鍵を取得し、メモリ２４に書き込み保存する。さらに、端末２は、ＢＬＥ通信を通じて車両１に接続し、端末２の電子キーＩＤ及びキー固有鍵を登録する。なお、端末２及び車両１の接続には、ユーザＩＤなどを利用したユーザ認証が課されることが好ましい。 When the terminal 2 is used as the electronic key of the vehicle 1, the terminal 2 performs electronic key registration for registering the electronic key ID and the key unique key of the terminal 2 in the vehicle 1. For example, the terminal 2 acquires an electronic key ID and a key-specific key from a server (not shown) through network communication, and writes and stores the electronic key ID and the key unique key in the memory 24. Further, the terminal 2 connects to the vehicle 1 through BLE communication and registers the electronic key ID and the key unique key of the terminal 2. It is preferable that user authentication using a user ID or the like is imposed on the connection between the terminal 2 and the vehicle 1.

端末２は、車両１からのアドバタイズメッセージを受信した場合、そのアドバタイズメッセージに連なる一連の通信接続処理を実行する。そして、端末２は、車両１とのＢＬＥ通信接続を確立すると、端末２の電子キー登録が完了していることを前提に、車両１との相互通信を通じて自動的にＩＤ照合を実行する。例えば、ＩＤ照合において、照合ＥＣＵ４及び端末制御部２０は、互いに電子キーＩＤを通信して電子キーＩＤの照合を行うとともに、キー固有鍵を用いたチャレンジレスポンス認証等の暗号認証を行う。照合ＥＣＵ４は、これら照合や認証が成立することを確認すると、ＩＤ照合を成立と判定する。なお、これら一連のＩＤ照合は、ユーザによる端末２の操作をすることなく、また、車両１の操作をすることなく自動的に処理が実行される。 When the terminal 2 receives the advertisement message from the vehicle 1, the terminal 2 executes a series of communication connection processes linked to the advertisement message. Then, when the terminal 2 establishes the BLE communication connection with the vehicle 1, the terminal 2 automatically executes ID verification through mutual communication with the vehicle 1 on the premise that the electronic key registration of the terminal 2 is completed. For example, in ID collation, the collation ECU 4 and the terminal control unit 20 communicate electronic key IDs with each other to collate electronic key IDs, and perform cryptographic authentication such as challenge response authentication using a key-specific key. When the collation ECU 4 confirms that these collations and authentications are established, the collation ECU 4 determines that the ID collation is established. It should be noted that these series of ID collations are automatically executed without the user operating the terminal 2 and without operating the vehicle 1.

認証システム３は、車両１と端末２とが通信を行うとき、車両１に対する端末２の位置を判定する位置判定システム３０を備えている。本例の位置判定システム３０は、車両１と端末２とがＩＤ照合を行うとき、端末２が車両１の室内外のどちらに位置するかを判定する。また、この位置判定は、ＩＤ照合の通信時のどのタイミングで実施されてもよい。すなわち、位置判定は、ＩＤ照合前、ＩＤ照合後、ＩＤ照合途中のいずれで実施されてもよい。 The authentication system 3 includes a position determination system 30 that determines the position of the terminal 2 with respect to the vehicle 1 when the vehicle 1 and the terminal 2 communicate with each other. The position determination system 30 of this example determines whether the terminal 2 is located indoors or outdoors of the vehicle 1 when the vehicle 1 and the terminal 2 perform ID collation. Further, this position determination may be performed at any timing during ID collation communication. That is, the position determination may be performed before ID collation, after ID collation, or during ID collation.

位置判定システム３０は、車両１に対する端末２の位置を判定する位置判定部３１を備えている。本実施形態の位置判定部３１は、車両１の照合ＥＣＵ４に設けられている。本実施形態の場合、位置判定部３１は、室外通信部１６及び室内通信部１７から通信部ＩＤを含んだ電波ＳｄをＢＬＥ送信させる。電波Ｓｄは、例えば位置検出のために送信される位置検出信号である。なお、一連の位置判定の過程において、電波Ｓｄの送信は、室外通信部１６及び室内通信部１７のそれぞれから複数回、実行される。また、室外通信部１６及び室内通信部１７からの電波Ｓｄの送信電力は、同じである。 The position determination system 30 includes a position determination unit 31 that determines the position of the terminal 2 with respect to the vehicle 1. The position determination unit 31 of the present embodiment is provided in the collation ECU 4 of the vehicle 1. In the case of the present embodiment, the position determination unit 31 causes the outdoor communication unit 16 and the indoor communication unit 17 to BLE transmit the radio wave Sd including the communication unit ID. The radio wave Sd is, for example, a position detection signal transmitted for position detection. In the process of a series of position determination, the transmission of the radio wave Sd is executed a plurality of times from each of the outdoor communication unit 16 and the indoor communication unit 17. Further, the transmission power of the radio wave Sd from the outdoor communication unit 16 and the indoor communication unit 17 is the same.

位置判定システム３０は、室外通信部１６及び室内通信部１７と端末２との間の電波Ｓｄの受信信号強度を、各周波数の電波Ｓｄ毎に測定する測定部３２を備えている。本実施形態の測定部３２は、端末２の端末制御部２０に設けられている。測定部３２は、室外通信部１６及び室内通信部１７からの電波Ｓｄを、端末通信部２２を介して受信すると、この電波Ｓｄの受信信号強度（RSSI：Received Signal Strength Indicator）を測定する。測定部３２は、受信した電波Ｓｄごとに受信信号強度を測定し、その測定結果を照合ＥＣＵ４へ送信する。受信信号強度の測定結果は、例えば電波Ｓｄに含まれていた通信部ＩＤに紐づけられて送信される。 The position determination system 30 includes a measuring unit 32 that measures the received signal strength of the radio wave Sd between the outdoor communication unit 16 and the indoor communication unit 17 and the terminal 2 for each radio wave Sd of each frequency. The measurement unit 32 of the present embodiment is provided in the terminal control unit 20 of the terminal 2. When the measuring unit 32 receives the radio wave Sd from the outdoor communication unit 16 and the indoor communication unit 17 via the terminal communication unit 22, the measuring unit 32 measures the received signal strength indicator (RSSI: Received Signal Strength Indicator) of the radio wave Sd. The measuring unit 32 measures the received signal strength for each received radio wave Sd, and transmits the measurement result to the collation ECU 4. The measurement result of the received signal strength is transmitted, for example, associated with the communication unit ID included in the radio wave Sd.

位置判定システム３０は、照合ＥＣＵ４において、測定部３２からの測定結果を受信した場合に、受信信号強度データを取得するデータ取得部３３を備えている。受信信号強度データは、例えば受信信号強度の平均値である。 The position determination system 30 includes a data acquisition unit 33 that acquires received signal strength data when the measurement result from the measurement unit 32 is received in the collation ECU 4. The received signal strength data is, for example, an average value of the received signal strength.

図２に示すように、車両１は、複数のボディ部品４０によって外郭が覆われている。ボディ部品４０は、例えば金属材料からなるパネル状の部品である。なお、車両１は、車長方向、車幅方向、及び車高方向を有している。図２では、車長方向をＸ軸、車幅方向をＹ軸、車高方向をＺ軸で示している。ボディ部品４０には、車両１の前側において車幅方向の両側に設けられた２つのフロントフェンダ４１が含まれる。各フロントフェンダ４１は、車両１の前輪の上側に設けられている。 As shown in FIG. 2, the outer shell of the vehicle 1 is covered with a plurality of body parts 40. The body component 40 is, for example, a panel-shaped component made of a metal material. The vehicle 1 has a vehicle length direction, a vehicle width direction, and a vehicle height direction. In FIG. 2, the vehicle length direction is indicated by the X axis, the vehicle width direction is indicated by the Y axis, and the vehicle height direction is indicated by the Z axis. The body component 40 includes two front fenders 41 provided on both sides in the vehicle width direction on the front side of the vehicle 1. Each front fender 41 is provided on the upper side of the front wheel of the vehicle 1.

図３及び図４に示すように、室内通信部１７及び室外通信部１６は、車両１の室内及び室外にそれぞれに設けられている。ここで、室内とは、例えばルーフなどのボディ部品４０と車両ドア１０とに囲われた車室４４の内を指す。また、室外とは、該車室４４の外を指す。また、車室４４の外郭の一部には、電波Ｓｄを透過する透過部材４５が設けられている。透過部材４５には、車両前方に設けられたフロントガラス、車両ドア１０に設けられたサイドガラス、及び車両後方のリアガラスなどのガラス部材が含まれる。透過部材４５は、車高方向において、車室４４の床面４４ａから離隔して配置されている。 As shown in FIGS. 3 and 4, the indoor communication unit 17 and the outdoor communication unit 16 are provided indoors and outdoors of the vehicle 1, respectively. Here, the interior refers to the interior of the vehicle interior 44 surrounded by the body component 40 such as a roof and the vehicle door 10. Further, the outdoor means the outside of the vehicle interior 44. Further, a transmission member 45 that transmits radio waves Sd is provided in a part of the outer shell of the vehicle interior 44. The transmissive member 45 includes a glass member such as a windshield provided in the front of the vehicle, side glasses provided in the vehicle door 10, and a rear glass provided in the rear of the vehicle. The transmission member 45 is arranged apart from the floor surface 44a of the vehicle interior 44 in the vehicle height direction.

室内通信部１７は、室内において床面４４ａの近傍に配置されている。ここで、床面４４ａの近傍とは、例えば車高方向において、透過部材４５の下側の見切り線４５ａよりも下側の位置である。なお、室内通信部１７は、車長方向及び車幅方向において、車室４４の中央付近に設けられることが好ましい。室内通信部１７は、例えば、センターコンソール、又は運転席や助手席の下側などに配置される。 The indoor communication unit 17 is arranged in the vicinity of the floor surface 44a in the room. Here, the vicinity of the floor surface 44a is a position below the parting line 45a on the lower side of the transmission member 45, for example, in the vehicle height direction. The indoor communication unit 17 is preferably provided near the center of the vehicle interior 44 in the vehicle length direction and the vehicle width direction. The indoor communication unit 17 is arranged, for example, on the center console or below the driver's seat or passenger seat.

室外通信部１６は、車両１の室外において、車幅方向の両側にそれぞれ設けられている。本実施形態の各室外通信部１６は、車幅方向において、対称となる位置に設けられている。本実施形態の場合、室外通信部１６は、車両１の車幅方向一方側に設けられた第１室外通信部１６ａと、車両１の車幅方向他方側に設けられた第２室外通信部１６ｂとを含む。以降、車幅方向一方側を右側、車幅方向他方側を左側と記載する。なお、室内通信部１７、第１室外通信部１６ａ及び第２室外通信部１６ｂは、同様のＢＬＥ通信ユニットである。 The outdoor communication unit 16 is provided on both sides in the vehicle width direction outdoors of the vehicle 1. Each outdoor communication unit 16 of the present embodiment is provided at a symmetrical position in the vehicle width direction. In the case of the present embodiment, the outdoor communication unit 16 includes a first outdoor communication unit 16a provided on one side in the vehicle width direction of the vehicle 1 and a second outdoor communication unit 16b provided on the other side in the vehicle width direction of the vehicle 1. And include. Hereinafter, one side in the vehicle width direction will be referred to as the right side, and the other side in the vehicle width direction will be referred to as the left side. The indoor communication unit 17, the first outdoor communication unit 16a, and the second outdoor communication unit 16b are similar BLE communication units.

図５に示すように、フロントフェンダ４１は、車両１の外部に露出する外面４１ａと、その反対側の内面４１ｂとを有している。また、フロントフェンダ４１の下部には、タイヤハウスカバー４３が設けられている。タイヤハウスカバー４３は、樹脂材料からなる。さらに、フロントフェンダ４１の内面４１ｂは、車両１の内部部品５０との間に間隔を空けて対向している。内部部品５０には、例えばエンジンルームを形成するインサイドパネルやボディフレーム、及びエンジンルーム内の種々の装置などが含まれる。 As shown in FIG. 5, the front fender 41 has an outer surface 41a exposed to the outside of the vehicle 1 and an inner surface 41b on the opposite side thereof. Further, a tire house cover 43 is provided below the front fender 41. The tire house cover 43 is made of a resin material. Further, the inner surface 41b of the front fender 41 faces the internal component 50 of the vehicle 1 with a gap. The internal component 50 includes, for example, an inside panel and a body frame forming the engine room, various devices in the engine room, and the like.

各室外通信部１６は、フロントフェンダ４１の内部に配置されている。フロントフェンダ４１の内部の一例は、フロントフェンダ４１、内部部品５０、及びタイヤハウスカバー４３に囲われた空間である。本実施形態の場合、各室外通信部１６は、フロントフェンダ４１の内部において、フロントフェンダ４１の内面４１ｂに取り付けられている。 Each outdoor communication unit 16 is arranged inside the front fender 41. An example of the inside of the front fender 41 is a space surrounded by the front fender 41, the internal parts 50, and the tire house cover 43. In the case of the present embodiment, each outdoor communication unit 16 is attached to the inner surface 41b of the front fender 41 inside the front fender 41.

測定部３２は、第１室外通信部１６ａから送信された電波Ｓｄの受信信号強度Ａ、第２室外通信部１６ｂから送信された電波Ｓｄの受信信号強度Ｂ、室内通信部１７から送信された電波Ｓｄの受信信号強度Ｃを測定する。 The measuring unit 32 has a reception signal strength A of the radio wave Sd transmitted from the first outdoor communication unit 16a, a reception signal strength B of the radio wave Sd transmitted from the second outdoor communication unit 16b, and a radio wave transmitted from the indoor communication unit 17. The received signal strength C of Sd is measured.

データ取得部３３は、受信信号強度Ａの平均値を計算し、その計算結果を第１室外通信部１６ａと端末２との通信で得た受信信号強度データＤａ（以降、データＤａ）とする。また、データ取得部３３は、受信信号強度Ｂの平均値を計算し、その計算結果を第２室外通信部１６ｂと端末２との通信で得た受信信号強度データＤｂ（以降、データＤｂ）とする。データ取得部３３は、受信信号強度Ｃの平均値を計算し、その計算結果を室内通信部１７と端末２との通信で得た受信信号強度データＤｃ（以降、データＤｃ）とする。データＤａ及びデータＤｂが「第１受信信号強度データ」に該当する。データＤｃが「第２信号強度データ」に該当する。 The data acquisition unit 33 calculates the average value of the received signal strength A, and the calculation result is used as the received signal strength data Da (hereinafter referred to as data Da) obtained by communication between the first outdoor communication unit 16a and the terminal 2. Further, the data acquisition unit 33 calculates the average value of the received signal strength B, and the calculation result is combined with the received signal strength data Db (hereinafter referred to as data Db) obtained by communication between the second outdoor communication unit 16b and the terminal 2. do. The data acquisition unit 33 calculates the average value of the received signal strength C, and the calculation result is used as the received signal strength data Dc (hereinafter referred to as data Dc) obtained by communication between the indoor communication unit 17 and the terminal 2. Data Da and data Db correspond to "first received signal strength data". The data Dc corresponds to the "second signal strength data".

位置判定部３１は、データＤａ、データＤｂ、及びデータＤｃの大小を比較することにより、端末２が車両１の室内及び室外のどちらに位置するかを判定する。本実施形態の位置判定部３１は、室外において右側のエリアＥａ、室外において左側のエリアＥｂ、及び室内のエリアＥｃのいずれのエリアに端末２が位置するかを判定する（図７参照）。 The position determination unit 31 determines whether the terminal 2 is located indoors or outdoors of the vehicle 1 by comparing the magnitudes of the data Da, the data Db, and the data Dc. The position determination unit 31 of the present embodiment determines in which area of the right side area Ea outdoors, the left side area Eb outdoors, and the indoor area Ec the terminal 2 is located (see FIG. 7).

位置判定システム３０は、第１受信信号強度データとしてのデータＤａ，Ｄｂと、第２受信信号強度データとしてのデータＤｃとの少なくとも一方を補正する補正部３４を備えている。補正部３４は、データＤｃに対するデータＤａ，Ｄｂの比が、補正前よりも補正後の方が大きくなるように補正を行う。すなわち、データＤｃに対するデータＤａの比「Ｄａ／Ｄｃ」の値が大きくなるように補正を行う。また、データＤｃに対するデータＤｂの比「Ｄｂ／Ｄｃ」の値が大きくなるように補正を行う。本実施形態の補正部３４は、予め設定された補正量Ｆによって補正を行う。補正量Ｆは、室外通信部１６から送信された電波Ｓｄの伝搬経路において、フロントフェンダ４１の内部から車両１の外部へ伝搬する際に生じる受信信号強度の損失を補うように設定されている。位置判定部３１は、補正部３４によって補正された後のデータＤａ、データＤｂ、及びデータＤｃを用いての大小比較を行う。 The position determination system 30 includes a correction unit 34 that corrects at least one of the data Da and Db as the first received signal strength data and the data Dc as the second received signal strength data. The correction unit 34 makes corrections so that the ratio of the data Da and Db to the data Dc is larger after the correction than before the correction. That is, the correction is performed so that the value of the ratio "Da / Dc" of the data Da to the data Dc becomes large. Further, correction is performed so that the value of the ratio "Db / Dc" of the data Db to the data Dc becomes large. The correction unit 34 of the present embodiment corrects with a preset correction amount F. The correction amount F is set so as to compensate for the loss of the received signal strength that occurs when propagating from the inside of the front fender 41 to the outside of the vehicle 1 in the propagation path of the radio wave Sd transmitted from the outdoor communication unit 16. The position determination unit 31 performs a magnitude comparison using the data Da, the data Db, and the data Dc after being corrected by the correction unit 34.

以下、本実施形態の作用について説明する。
図６に示すように、Ｓ１０１（Ｓはステップの略、以下同様）では、照合ＥＣＵ４は、端末２とのＢＬＥ通信接続を確立するために、各室外通信部１６及び室内通信部１７からアドバタイズメッセージを車両１の近傍エリアに順に繰り返し送信する。端末２は、車両１の近傍エリアに進入し、アドバタイズメッセージを受信すると、通信が確立した通信部との間で車両１とのＢＬＥ通信接続を開始する。 Hereinafter, the operation of this embodiment will be described.
As shown in FIG. 6, in S101 (S is an abbreviation for a step, the same applies hereinafter), the collation ECU 4 receives an advertisement message from each outdoor communication unit 16 and indoor communication unit 17 in order to establish a BLE communication connection with the terminal 2. Is repeatedly transmitted to the vicinity area of the vehicle 1 in order. When the terminal 2 enters the area near the vehicle 1 and receives the advertisement message, the terminal 2 starts a BLE communication connection with the vehicle 1 with the communication unit for which communication has been established.

Ｓ１０２では、車両１及び端末２は、アドバタイズメッセージに連なる一連の通信接続の処理に従い、機器認証が成立すると、自動で通信接続する。両者の通信接続は、端末２が車両１とのＢＬＥ通信の範囲外へ移動するまで継続される。 In S102, the vehicle 1 and the terminal 2 automatically make a communication connection when the device authentication is established according to the processing of a series of communication connections connected to the advertisement message. The communication connection between the two is continued until the terminal 2 moves out of the range of BLE communication with the vehicle 1.

Ｓ１０３では、車両１及び端末２が通信接続されると、車両１及び端末２は、ＩＤ照合を開始する。ＩＤ照合には、電子キーＩＤの送受信及びキー固有鍵を用いた暗号認証が含まれる。照合ＥＣＵ４は、電子キーＩＤの照合及びキー固有鍵を用いた暗号認証のいずれかが不成立の場合、ＩＤ照合が不成立したと判定する。ＩＤ照合が不成立した場合、車両１の作動は禁止される。一方、照合ＥＣＵ４は、ＩＤ照合が成立すれば、処理を継続する。 In S103, when the vehicle 1 and the terminal 2 are connected by communication, the vehicle 1 and the terminal 2 start ID collation. The ID verification includes transmission / reception of an electronic key ID and cryptographic authentication using a key unique key. The collation ECU 4 determines that the ID collation is unsuccessful when either the electronic key ID collation or the cryptographic authentication using the key unique key is unsuccessful. If the ID verification is unsuccessful, the operation of the vehicle 1 is prohibited. On the other hand, the collation ECU 4 continues the process if the ID collation is established.

Ｓ１０４では、位置判定部３１は、室外通信部１６及び室内通信部１７から電波Ｓｄを送信する。電波Ｓｄには、各々の通信部ＩＤが含まれ、受信側の端末２は、各室外通信部１６及び室内通信部１７のうちいずれの通信部からの電波Ｓｄなのかを識別可能となっている。また、電波Ｓｄは、端末２が個別に各電波Ｓｄを受け取ることができるように、各通信部の間で、タイミング又は周波数をずらして送信されることが好ましい。位置判定部３１は、これら電波Ｓｄの受信信号強度を端末２の測定部３２で測定させる。測定部３２は、各電波Ｓｄの受信信号強度Ａ，Ｂ，Ｃを測定すると、その測定結果を、照合ＥＣＵ４に通知する。照合ＥＣＵ４のデータ取得部３３は、測定結果をメモリ９に記憶する。 In S104, the position determination unit 31 transmits the radio wave Sd from the outdoor communication unit 16 and the indoor communication unit 17. The radio wave Sd includes each communication unit ID, and the terminal 2 on the receiving side can identify which of the outdoor communication unit 16 and the indoor communication unit 17 is the radio wave Sd. .. Further, it is preferable that the radio wave Sd is transmitted at different timings or frequencies between the communication units so that the terminal 2 can receive each radio wave Sd individually. The position determination unit 31 causes the measurement unit 32 of the terminal 2 to measure the received signal strength of these radio waves Sd. When the measuring unit 32 measures the received signal intensities A, B, and C of each radio wave Sd, the measuring unit 32 notifies the collation ECU 4 of the measurement result. The data acquisition unit 33 of the collation ECU 4 stores the measurement result in the memory 9.

位置判定部３１は、電波送信、受信信号強度測定、及び測定結果通知の一連の処理を、室外通信部１６及び室内通信部１７のそれぞれにおいて、繰り返し実行する。本実施形態の場合、この一連の処理は、周波数ホッピングにより周波数を変えて繰り返し実行される。なお、図６では上記一連の処理を一回だけ図示している。これにより、第１室外通信部１６ａ、第２室外通信部１６ｂ及び室内通信部１７の各々について、端末２との間の通信で測定された受信信号強度の数値群が取得される。すなわち、データ取得部３３は、第１室外通信部１６ａの受信信号強度Ａ、第２室外通信部１６ｂの受信信号強度Ｂ、及び室内通信部１７の受信信号強度Ｃの各数値群を取得する。 The position determination unit 31 repeatedly executes a series of processes of radio wave transmission, reception signal strength measurement, and measurement result notification in each of the outdoor communication unit 16 and the indoor communication unit 17. In the case of the present embodiment, this series of processes is repeatedly executed by changing the frequency by frequency hopping. Note that FIG. 6 illustrates the above series of processes only once. As a result, for each of the first outdoor communication unit 16a, the second outdoor communication unit 16b, and the indoor communication unit 17, the numerical value group of the received signal strength measured by the communication with the terminal 2 is acquired. That is, the data acquisition unit 33 acquires each numerical group of the reception signal strength A of the first outdoor communication unit 16a, the reception signal strength B of the second outdoor communication unit 16b, and the reception signal strength C of the indoor communication unit 17.

Ｓ１０５では、データ取得部３３は、受信信号強度Ａ、受信信号強度Ｂ、及び受信信号強度Ｃの各々に基づいて、データＤａ、データＤｂ、及びデータＤｃを取得する。本実施形態のデータ取得部３３は、受信信号強度Ａ，Ｂ，Ｃの各々の数値群から、受信信号強度Ａ，Ｂ，Ｃのそれぞれの平均値を算出する。そして、データ取得部３３は、受信信号強度Ａの平均値をデータＤａ、受信信号強度Ｂの平均値をデータＤｂ、受信信号強度Ｃの平均値をデータＤｃとして取得する。 In S105, the data acquisition unit 33 acquires data Da, data Db, and data Dc based on each of the received signal strength A, the received signal strength B, and the received signal strength C. The data acquisition unit 33 of the present embodiment calculates the average value of each of the received signal intensities A, B, and C from each numerical group of the received signal intensities A, B, and C. Then, the data acquisition unit 33 acquires the average value of the received signal strength A as the data Da, the average value of the received signal strength B as the data Db, and the average value of the received signal strength C as the data Dc.

ここで、車両１と端末２との間の電波Ｓｄの伝搬経路と、受信信号強度の関係を説明する。
図７及び図８に示すように、車両１と端末２との間には、第１室外通信部１６ａと端末２との間の電波Ｓｄの伝搬経路Ｐ１と、第２室外通信部１６ｂと端末２との間の電波Ｓｄの伝搬経路Ｐ２と、室内通信部１７と端末２との間の電波Ｓｄの伝搬経路Ｐ３とが存在する。なお、伝搬経路Ｐ１，Ｐ２，Ｐ３には、送信された電波Ｓｄが端末２に到達するまでに、直接波、回折波、反射波として通る種々の経路が含まれる。伝搬経路Ｐ１，Ｐ２，Ｐ３において電波Ｓｄを遮蔽する障害物が存在する場合、電波Ｓｄの受信信号強度が低下する。すなわち、障害物により、電波Ｓｄの受信信号強度に損失が生じる。 Here, the relationship between the propagation path of the radio wave Sd between the vehicle 1 and the terminal 2 and the received signal strength will be described.
As shown in FIGS. 7 and 8, between the vehicle 1 and the terminal 2, the propagation path P1 of the radio wave Sd between the first outdoor communication unit 16a and the terminal 2 and the second outdoor communication unit 16b and the terminal There is a propagation path P2 of the radio wave Sd between 2 and a propagation path P3 of the radio wave Sd between the indoor communication unit 17 and the terminal 2. The propagation paths P1, P2, and P3 include various paths that the transmitted radio wave Sd passes as a direct wave, a diffracted wave, and a reflected wave before reaching the terminal 2. When there is an obstacle that shields the radio wave Sd in the propagation paths P1, P2, and P3, the received signal strength of the radio wave Sd is lowered. That is, the obstacle causes a loss in the received signal strength of the radio wave Sd.

図７に示す通り、端末２が室外に位置する場合、室内通信部１７から送信される電波Ｓｄの伝搬経路Ｐ３には、車室４４を形成する車両ドア１０及びボディ部品４０などの障害物が存在する。また、室内通信部１７から送信された電波Ｓｄは、障害物を回り込むように回折し、透過部材４５を通過して室内から室外へ伝搬する。この回折により、電波Ｓｄの受信信号強度には損失が生じる。 As shown in FIG. 7, when the terminal 2 is located outside the room, obstacles such as the vehicle door 10 and the body component 40 forming the vehicle compartment 44 are present in the propagation path P3 of the radio wave Sd transmitted from the indoor communication unit 17. exist. Further, the radio wave Sd transmitted from the indoor communication unit 17 is diffracted so as to go around the obstacle, passes through the transmission member 45, and propagates from the room to the outside. This diffraction causes a loss in the received signal strength of the radio wave Sd.

室外において車両１の右側に端末２が位置する場合、伝搬経路Ｐ２は、伝搬経路Ｐ１に比べて伝播距離が長い。また、伝搬経路Ｐ２には、障害物として、ボディ部品４０が存在する。一方、室外において車両１の左側に端末２が位置する場合、伝搬経路Ｐ１は、伝搬経路Ｐ２に比べて伝播距離が長い。また、伝搬経路Ｐ１には、障害物として、ボディ部品４０が存在する。従って、室外において車両１の右側に端末２が位置する場合、通常、受信信号強度Ａ，Ｂ，Ｃのうち、受信信号強度Ａが最も大きくなる。また、室外において車両１の左側に端末２が位置する場合、通常、受信信号強度Ａ，Ｂ，Ｃのうち、受信信号強度Ｂが最も大きくなる。 When the terminal 2 is located on the right side of the vehicle 1 outdoors, the propagation path P2 has a longer propagation distance than the propagation path P1. Further, the body component 40 exists as an obstacle in the propagation path P2. On the other hand, when the terminal 2 is located on the left side of the vehicle 1 outdoors, the propagation path P1 has a longer propagation distance than the propagation path P2. Further, the body component 40 exists as an obstacle in the propagation path P1. Therefore, when the terminal 2 is located on the right side of the vehicle 1 outdoors, the received signal strength A is usually the largest among the received signal strengths A, B, and C. Further, when the terminal 2 is located on the left side of the vehicle 1 outdoors, the received signal strength B is usually the largest among the received signal strengths A, B, and C.

図８に示す通り、端末２が室内に位置する場合、伝搬経路Ｐ１及び伝搬経路Ｐ２には、車室４４を形成する車両ドア１０及びボディ部品４０などの障害物がある。また、室外通信部１６から送信された電波Ｓｄは、障害物を回り込むように回折し、透過部材４５を通過して室外から室内へ伝搬する。そのため、通常、受信信号強度Ａ，Ｂ，Ｃのうち、受信信号強度Ｃが最も大きくなる。 As shown in FIG. 8, when the terminal 2 is located indoors, the propagation path P1 and the propagation path P2 have obstacles such as a vehicle door 10 and a body component 40 forming the vehicle interior 44. Further, the radio wave Sd transmitted from the outdoor communication unit 16 is diffracted so as to go around the obstacle, passes through the transmission member 45, and propagates from the outdoor to the indoor. Therefore, the received signal strength C is usually the largest among the received signal strengths A, B, and C.

上記のように、受信信号強度Ａ，Ｂ，Ｃの大小を比較することによって、端末２が、室外において右側のエリアＥａ、室外における左側のエリアＥｂ、及び室内のエリアＥｃのいずれに位置するかを判定することが可能となる期待があった。また、データＤａ，Ｄｂ，Ｄｃとして、受信信号強度Ａ，Ｂ，Ｃの平均値の大小を比較することによって、受信信号強度Ａ，Ｂ，Ｃの測定ごとに生じるばらつきによる判定結果への影響を抑制できる。 As described above, by comparing the magnitudes of the received signal strengths A, B, and C, whether the terminal 2 is located in the area Ea on the right side outdoors, the area Eb on the left side outdoors, or the area Ec indoors. There was an expectation that it would be possible to determine. Further, by comparing the magnitude of the average value of the received signal intensities A, B, and C as the data Da, Db, and Dc, the influence on the judgment result due to the variation generated in each measurement of the received signal intensities A, B, and C can be obtained. Can be suppressed.

図９に示すように、室外通信部１６から送信される電波Ｓｄは、フロントフェンダ４１の内部から車両１の外部へ伝搬する間、すなわち、フロントフェンダ４１の内面４１ｂ側からフロントフェンダ４１の外面４１ａ側へ伝搬する間に、フロントフェンダ４１を回り込むように回折する。この回折により、受信信号強度Ａ及び受信信号強度Ｂには、損失が生じる。すなわち、伝搬経路Ｐ１及び伝搬経路Ｐ２において、フロントフェンダ４１の内部から車両１の外部へ伝搬する間に、電波Ｓｄの受信信号強度Ａ，Ｂには損失が生じる。これに対して、本実施形態の場合、補正部３４が設けられている。 As shown in FIG. 9, the radio wave Sd transmitted from the outdoor communication unit 16 propagates from the inside of the front fender 41 to the outside of the vehicle 1, that is, from the inner surface 41b side of the front fender 41 to the outer surface 41a of the front fender 41. While propagating to the side, it is diffracted so as to wrap around the front fender 41. Due to this diffraction, a loss occurs in the received signal strength A and the received signal strength B. That is, in the propagation path P1 and the propagation path P2, a loss occurs in the received signal intensities A and B of the radio wave Sd while propagating from the inside of the front fender 41 to the outside of the vehicle 1. On the other hand, in the case of the present embodiment, the correction unit 34 is provided.

図６に示す通り、Ｓ１０６では、補正部３４は、データＤａ及びデータＤｂを補正する。補正部３４は、データ取得部３３が算出したデータＤａ及びデータＤｂを、予め設定された補正量Ｆにより補正する。補正部３４は、補正前より補正後の方が、データＤｃに対するデータＤａの比「Ｄａ／Ｄｃ」の値が大きくなり、データＤｃに対するデータＤｂの比「Ｄｂ／Ｄｃ」の値が大きくなるように、補正を行う。補正部３４は、例えばデータＤａに補正量Ｆを加算した値を、補正後のデータＤａとして記憶する。また、補正部３４は、例えばデータＤｂに補正量Ｆを加算した値を、補正後のデータＤｂとして記憶する。また、補正量Ｆは、フロントフェンダ４１の内部から車両１の外部へ伝搬する間に生じる受信信号強度Ａ，Ｂの損失を補うように設定されている。そのため、上記損失による位置判定への影響を抑制できる。 As shown in FIG. 6, in S106, the correction unit 34 corrects the data Da and the data Db. The correction unit 34 corrects the data Da and the data Db calculated by the data acquisition unit 33 with a preset correction amount F. In the correction unit 34, the value of the ratio "Da / Dc" of the data Da to the data Dc is larger after the correction than before the correction, and the value of the ratio "Db / Dc" of the data Db to the data Dc is larger. Make corrections. The correction unit 34 stores, for example, a value obtained by adding the correction amount F to the data Da as the corrected data Da. Further, the correction unit 34 stores, for example, a value obtained by adding the correction amount F to the data Db as the corrected data Db. Further, the correction amount F is set so as to compensate for the loss of the received signal intensities A and B generated while propagating from the inside of the front fender 41 to the outside of the vehicle 1. Therefore, it is possible to suppress the influence of the above loss on the position determination.

Ｓ１０７では、位置判定部３１は、補正後の、データＤａ、データＤｂ及びデータＤｃの大小を比較することにより、端末２が車両１のどのエリアに位置するかを判定する。例えば、位置判定部３１は、データＤａ，Ｄｂ，Ｄｃのうち、データＤａが最も大きい場合、端末２がエリアＥａに位置していると判定する。また、位置判定部３１は、データＤａ，Ｄｂ，Ｄｃのうち、データＤｂが最も大きい場合、端末２がエリアＥｂに位置していると判定する。さらに、位置判定部３１は、データＤａ，Ｄｂ，Ｄｃのうち、データＤｃが最も大きい場合、端末２がエリアＥｃに位置していると判定する。 In S107, the position determination unit 31 determines in which area of the vehicle 1 the terminal 2 is located by comparing the magnitudes of the corrected data Da, data Db, and data Dc. For example, the position determination unit 31 determines that the terminal 2 is located in the area Ea when the data Da is the largest among the data Da, Db, and Dc. Further, the position determination unit 31 determines that the terminal 2 is located in the area Eb when the data Db is the largest among the data Da, Db, and Dc. Further, the position determination unit 31 determines that the terminal 2 is located in the area Ec when the data Dc is the largest among the data Da, Db, and Dc.

ボディＥＣＵ５は、ＩＤ照合が成立し、かつエリアＥａ又はエリアＥｂに端末２が位置していると判定されているときに、タッチセンサ１３及びロックボタン１４の検出信号を基に、ドアロック装置１１の作動を制御する。なお、ボディＥＣＵ５は、端末２の位置しているエリアＥａ，Ｅｂに応じて、作動させる車両ドア１０を制御してもよい。 The body ECU 5 has a door lock device 11 based on the detection signals of the touch sensor 13 and the lock button 14 when the ID verification is established and it is determined that the terminal 2 is located in the area Ea or the area Eb. Control the operation of. The body ECU 5 may control the vehicle door 10 to be operated according to the areas Ea and Eb where the terminal 2 is located.

エンジンＥＣＵ７は、ＩＤ照合が成立し、かつ端末２がエリアＥｃに位置していると判定されていることを一条件に、エンジンスイッチ１５が操作されることでエンジン６の遷移を制御する。このように、位置判定システム３０により、端末２が車両１のいずれのエリアに位置するかを判定することで、端末２の位置に応じた車両１の作動が可能になる。 The engine ECU 7 controls the transition of the engine 6 by operating the engine switch 15 on condition that the ID collation is established and the terminal 2 is determined to be located in the area Ec. In this way, the position determination system 30 determines in which area of the vehicle 1 the terminal 2 is located, so that the vehicle 1 can be operated according to the position of the terminal 2.

ところで、電波Ｓｄは、金属材料によって遮蔽され易い。また、室外通信部１６は、雨や日光など、外環境による劣化などを避けるため、車両１の外部に露出しないように設けられる。仮に、室外通信部１６が金属製のボディ部品４０によって囲われるように配置される場合、室外通信部１６から車両１の外部へと伝搬する電波Ｓｄがボディ部品４０により遮蔽されてしまう。その結果、端末２が室外に位置する場合でも、室外通信部１６からの電波Ｓｄの受信信号強度が低下してしまい、端末２が室外に位置するという判定ができなくなる虞があった。 By the way, the radio wave Sd is easily shielded by the metal material. Further, the outdoor communication unit 16 is provided so as not to be exposed to the outside of the vehicle 1 in order to avoid deterioration due to an external environment such as rain or sunlight. If the outdoor communication unit 16 is arranged so as to be surrounded by the metal body component 40, the radio wave Sd propagating from the outdoor communication unit 16 to the outside of the vehicle 1 is shielded by the body component 40. As a result, even when the terminal 2 is located outdoors, the strength of the received signal of the radio wave Sd from the outdoor communication unit 16 is lowered, and there is a possibility that it cannot be determined that the terminal 2 is located outdoors.

本実施形態の場合、室外通信部１６は、フロントフェンダ４１の内部に設けられている。室外通信部１６から送信される電波Ｓｄは、樹脂材料からなるタイヤハウスカバー４３を通過して車両１の外部へ伝搬する。そのため、フロントフェンダ４１の内部に設けることにより、室外通信部１６からの電波Ｓｄの受信信号強度の低下が抑制できる。 In the case of the present embodiment, the outdoor communication unit 16 is provided inside the front fender 41. The radio wave Sd transmitted from the outdoor communication unit 16 passes through the tire house cover 43 made of a resin material and propagates to the outside of the vehicle 1. Therefore, by providing it inside the front fender 41, it is possible to suppress a decrease in the reception signal strength of the radio wave Sd from the outdoor communication unit 16.

室内通信部１７は、室内において車室４４の床面４４ａの近傍に設けられている。これによれば、室内通信部１７から送信される電波Ｓｄは、透過部材４５を通って室外へと伝搬する。また、室内から室外へと伝搬する電波Ｓｄは、車高方向において、床面４４ａの近傍から、車室４４を形成する車両ドア１０及びボディ部品４０などの障害物を回り込むように回折する。この回折により、端末２が室外に位置する場合の受信信号強度Ｃが低下する。従って、端末２が室外に位置する場合に、受信信号強度Ｃを、受信信号強度Ａ，Ｂに対して相対的に小さくできる。 The indoor communication unit 17 is provided in the vicinity of the floor surface 44a of the vehicle interior 44 in the room. According to this, the radio wave Sd transmitted from the indoor communication unit 17 propagates to the outside of the room through the transmission member 45. Further, the radio wave Sd propagating from the room to the outside is diffracted from the vicinity of the floor surface 44a in the vehicle height direction so as to go around obstacles such as the vehicle door 10 and the body component 40 forming the vehicle room 44. Due to this diffraction, the received signal strength C when the terminal 2 is located outdoors is lowered. Therefore, when the terminal 2 is located outdoors, the received signal strength C can be made relatively smaller than the received signal strengths A and B.

以下、本実施形態の効果について説明する。
（１）車両１には、車両１の室外に設けられた室外通信部１６と、室内に設けられた室内通信部１７と、が設けられている。位置判定システム３０は、室外通信部１６と端末２との間、及び室内通信部１７と端末２との間で、それぞれ電波Ｓｄが通信されて測定された受信信号強度Ａ，Ｂ，ＣのデータＤａ，Ｄｂ，Ｄｃを取得するデータ取得部３３を備えている。また、位置判定システム３０は、室外通信部１６及び端末２の通信、及び室内通信部１７及び端末２の通信の各々で得たデータ同士の大小比較の結果から、端末２が、車両１の室外及び室内のどちらに位置するかを判定する位置判定部３１と、を備えている。さらに、室外通信部１６は、車両１のフロントフェンダ４１の内部に配置されている。この構成によれば、室外通信部１６と端末２の間において、電波Ｓｄは、フロントフェンダ４１の下部に設けられた樹脂材料からなるタイヤハウスカバー４３を介して通信される。従って、車両１の外部に端末２が位置する場合に、室外通信部１６と端末２の間で、車両１の金属製のボディ部品４０によって電波Ｓｄが遮蔽されて受信信号強度Ａ，Ｂが低下するという事象が発生しにくくなる。これにより、正しく位置判定できる。 Hereinafter, the effects of this embodiment will be described.
(1) The vehicle 1 is provided with an outdoor communication unit 16 provided outside the vehicle 1 and an indoor communication unit 17 provided indoors. The position determination system 30 is the data of the received signal strengths A, B, and C measured by communicating the radio wave Sd between the outdoor communication unit 16 and the terminal 2 and between the indoor communication unit 17 and the terminal 2, respectively. A data acquisition unit 33 for acquiring Da, Db, and Dc is provided. Further, in the position determination system 30, the terminal 2 is the outdoor of the vehicle 1 from the result of the magnitude comparison of the data obtained in each of the communication of the outdoor communication unit 16 and the terminal 2 and the communication of the indoor communication unit 17 and the terminal 2. And a position determination unit 31 for determining which of the rooms is located. Further, the outdoor communication unit 16 is arranged inside the front fender 41 of the vehicle 1. According to this configuration, the radio wave Sd is communicated between the outdoor communication unit 16 and the terminal 2 via the tire house cover 43 made of a resin material provided in the lower part of the front fender 41. Therefore, when the terminal 2 is located outside the vehicle 1, the radio wave Sd is shielded by the metal body component 40 of the vehicle 1 between the outdoor communication unit 16 and the terminal 2, and the received signal strengths A and B are lowered. The event of doing is less likely to occur. As a result, the position can be determined correctly.

（２）室外通信部１６は、フロントフェンダ４１において、車両１の外部に露出する外面４１ａとは反対の内面４１ｂに設けられている。この構成によれば、室外通信部１６を、フロントフェンダ４１の内面４１ｂに固定できる。 (2) The outdoor communication unit 16 is provided on the inner surface 41b of the front fender 41 opposite to the outer surface 41a exposed to the outside of the vehicle 1. According to this configuration, the outdoor communication unit 16 can be fixed to the inner surface 41b of the front fender 41.

（３）室外通信部１６は、車両１における車幅方向の両側に設けられたフロントフェンダ４１の内部に、それぞれ設けられた第１室外通信部１６ａ及び第２室外通信部１６ｂを含んでいる。データ取得部３３は、第１室外通信部１６ａと端末２との通信で得たデータＤａと、第２室外通信部１６ｂと端末２との通信で得たデータＤｂと、室内通信部１７と端末２との通信で得たデータＤｃとを取得する。位置判定部３１は、データＤａ、データＤｂ、及びデータＤｃの大小比較により、車両１の室外において車幅方向一方側のエリアＥａ、室外において車幅方向他方側のエリアＥｂ、及び車両１の室内のエリアＥｃのうちいずれのエリアに端末２が位置するかを判定する。この構成によれば、端末２が、車両１の室外及び室内のどちらに位置するかを判定するとともに、さらに室外において、エリアＥａ及びエリアＥｂのいずれに位置するかを判定できる。これは、ユーザにとっての利便性の向上に寄与できる。 (3) The outdoor communication unit 16 includes a first outdoor communication unit 16a and a second outdoor communication unit 16b provided inside the front fenders 41 provided on both sides in the vehicle width direction of the vehicle 1, respectively. The data acquisition unit 33 includes data Da obtained by communication between the first outdoor communication unit 16a and the terminal 2, data Db obtained by communication between the second outdoor communication unit 16b and the terminal 2, and the indoor communication unit 17 and the terminal. The data Dc obtained by communication with 2 is acquired. The position determination unit 31 compares the magnitudes of the data Da, the data Db, and the data Dc with respect to the area Ea on one side in the vehicle width direction outdoors of the vehicle 1, the area Eb on the other side in the vehicle width direction outdoors, and the interior of the vehicle 1. It is determined in which area of the area Ec the terminal 2 is located. According to this configuration, it is possible to determine whether the terminal 2 is located outdoors or indoors of the vehicle 1, and further determine whether the terminal 2 is located outdoors in the area Ea or the area Eb. This can contribute to the improvement of convenience for the user.

（４）電波Ｓｄは、室外通信部１６と端末２との間、及び室内通信部１７と端末２との間の各々で、複数の異なる周波数で通信される。この構成によれば、単一の周波数の電波Ｓｄで測定する場合と比べて、他の電波の干渉などによる影響を抑制できる。これにより、受信信号強度Ａ，Ｂ，Ｃの測定ごとに生じるばらつきによる判定結果への影響を抑制できる。 (4) The radio wave Sd is communicated between the outdoor communication unit 16 and the terminal 2 and between the indoor communication unit 17 and the terminal 2 at a plurality of different frequencies. According to this configuration, the influence of interference of other radio waves can be suppressed as compared with the case of measuring with the radio wave Sd of a single frequency. As a result, it is possible to suppress the influence on the determination result due to the variation that occurs in each measurement of the received signal intensities A, B, and C.

（５）データＤａ，Ｄｂ，Ｄｃは、各室外通信部１６と端末２との間、及び室内通信部１７と端末２との間の各々で、複数測定された受信信号強度Ａ，Ｂ，Ｃの平均値を含む。この構成によれば、受信信号強度Ａ，Ｂ，Ｃの測定ごとに生じるばらつきによる判定結果への影響を抑制できる。 (5) The data Da, Db, and Dc are a plurality of received signal intensities A, B, and C measured between the outdoor communication unit 16 and the terminal 2 and between the indoor communication unit 17 and the terminal 2, respectively. Includes the average value of. According to this configuration, it is possible to suppress the influence on the determination result due to the variation generated in each measurement of the received signal intensities A, B, and C.

（６）車両１には、電波Ｓｄを遮蔽する車両ドア１０やボディ部品４０などの障害物が設けられている。室内通信部１７は、車両１の室外に位置する端末２との間で通信する場合に、障害物によって、電波Ｓｄの受信信号強度Ｃが低下するような位置に設けられている。この構成によれば、室内から室外へと伝搬する電波Ｓｄが、その伝搬経路上で障害物によって影響を受けることにより、端末２が室外に位置する場合の受信信号強度Ｃを低下させることができる。従って、端末２が室外に位置する場合に、受信信号強度Ｃを、受信信号強度Ａ，Ｂに対して相対的に小さくできる。そのため、位置判定部３１は、端末２が室外に位置する場合に、端末２が室外に位置すると判定し易くなるので、それだけ判定精度が向上する。 (6) The vehicle 1 is provided with obstacles such as a vehicle door 10 and a body component 40 that shield the radio wave Sd. The indoor communication unit 17 is provided at a position where the reception signal strength C of the radio wave Sd is lowered due to an obstacle when communicating with the terminal 2 located outside the vehicle 1. According to this configuration, the radio wave Sd propagating from the room to the outside is affected by an obstacle on the propagation path, so that the received signal strength C when the terminal 2 is located outside the room can be lowered. .. Therefore, when the terminal 2 is located outdoors, the received signal strength C can be made relatively smaller than the received signal strengths A and B. Therefore, when the terminal 2 is located outdoors, the position determination unit 31 can easily determine that the terminal 2 is located outdoors, and the determination accuracy is improved accordingly.

（７）車両１には、電波Ｓｄを透過する透過部材４５が、車両１の車高方向において車両１の車室４４の床面４４ａから離隔して配置されるように設けられている。また、室内通信部１７は、床面４４ａの近傍に設けられている。この構成によれば、室内通信部１７により通信される電波Ｓｄは、透過部材４５を通って室外へと伝搬する。室内通信部１７により通信される電波Ｓｄは、車高方向において、床面４４ａの近傍から、車室４４を形成する車両ドア１０及びボディ部品４０などの障害物を回り込むように回折する。この回折により、端末２が室外に位置する場合の室内通信部１７の受信信号強度Ｃが低下する。従って、端末２が室外に位置する場合に、室内通信部１７の受信信号強度Ｃを、室外通信部１６の受信信号強度Ａ，Ｂに対して相対的に小さくできる。そのため、位置判定部３１は、端末２が室外に位置する場合に、端末２が室外に位置すると判定し易くなるので、それだけ判定精度が向上する。 (7) The vehicle 1 is provided with a transmission member 45 that transmits radio waves Sd so as to be separated from the floor surface 44a of the vehicle compartment 44 of the vehicle 1 in the vehicle height direction of the vehicle 1. Further, the indoor communication unit 17 is provided in the vicinity of the floor surface 44a. According to this configuration, the radio wave Sd communicated by the indoor communication unit 17 propagates to the outside of the room through the transmission member 45. The radio wave Sd communicated by the indoor communication unit 17 is diffracted from the vicinity of the floor surface 44a in the vehicle height direction so as to go around obstacles such as the vehicle door 10 and the body component 40 forming the vehicle interior 44. Due to this diffraction, the received signal strength C of the indoor communication unit 17 when the terminal 2 is located outside the room is lowered. Therefore, when the terminal 2 is located outdoors, the received signal strength C of the indoor communication unit 17 can be made relatively smaller than the received signal strengths A and B of the outdoor communication unit 16. Therefore, when the terminal 2 is located outdoors, the position determination unit 31 can easily determine that the terminal 2 is located outdoors, and the determination accuracy is improved accordingly.

（８）位置判定システム３０は、第１受信信号強度データとしてのデータＤａ，Ｄｂと、第２受信信号強度データとしてのデータＤｃとのうち少なくとも一方を補正する補正部３４を備えている。補正部３４は、前記第２受信信号強度データに対する前記第１受信信号強度データの比を、補正前より補正後の方が大きくなるように補正する。この構成によれば、室外通信部１６及び端末２の間で通信される電波Ｓｄの受信信号強度Ａ，Ｂを、受信信号強度Ｃに対して相対的に大きくする。これにより、例えば端末２が室外に位置するときに室外の判定をし易くなり、それだけ室外における判定精度を向上できる。 (8) The position determination system 30 includes a correction unit 34 that corrects at least one of the data Da and Db as the first received signal strength data and the data Dc as the second received signal strength data. The correction unit 34 corrects the ratio of the first received signal strength data to the second received signal strength data so that the ratio after the correction is larger than that before the correction. According to this configuration, the received signal strengths A and B of the radio wave Sd communicated between the outdoor communication unit 16 and the terminal 2 are made relatively large with respect to the received signal strength C. This makes it easier to make an outdoor determination, for example, when the terminal 2 is located outdoors, and the determination accuracy in the outdoor can be improved accordingly.

（９）補正部３４は、データＤａ，ＤｂとデータＤｃとの少なくとも一方を、補正量Ｆによって補正する。補正量Ｆは、電波Ｓｄの伝搬経路Ｐ１，Ｐ２において、フロントフェンダ４１の内部と車両１の外部との間で伝搬する際に生じる受信信号強度Ａ，Ｂの損失を補うように設定されている。この構成によれば、フロントフェンダ４１の内部に設けられたことにより生じる受信信号強度Ａ，Ｂの損失に応じた補正を行うことができる。 (9) The correction unit 34 corrects at least one of the data Da and Db and the data Dc by the correction amount F. The correction amount F is set so as to compensate for the loss of the received signal intensities A and B generated when propagating between the inside of the front fender 41 and the outside of the vehicle 1 in the propagation paths P1 and P2 of the radio wave Sd. .. According to this configuration, it is possible to perform correction according to the loss of the received signal intensities A and B caused by being provided inside the front fender 41.

なお、本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・補正部３４は、予め設定された補正量Ｆによって乗算することにより、補正を行ってもよい。 In addition, this embodiment can be changed and carried out as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
-The correction unit 34 may perform correction by multiplying by a preset correction amount F.

・補正部３４は、データＤａを補正する場合と、データＤｂを補正する場合とで、異なる補正量によって補正を行ってもよい。
・補正部３４による補正の方法は、予め設定された補正量Ｆを用いることに限定されない。例えば、受信信号強度Ａ，Ｂ，Ｃの演算に基づく演算を用いて補正を行ってもよい。 The correction unit 34 may perform correction with different correction amounts depending on whether the data Da is corrected or the data Db is corrected.
The method of correction by the correction unit 34 is not limited to using the preset correction amount F. For example, the correction may be performed by using an operation based on the operations of the received signal strengths A, B, and C.

・補正部３４は、第１受信信号強度データを補正してもよいし、第２受信信号強度データを補正してもよいし、これらの両方を補正してもよい。
・補正部３４は、第２受信信号強度データに対する前記第１受信信号強度データの比を、補正前より補正後の方が小さくなるように補正してもよい。 The correction unit 34 may correct the first received signal strength data, may correct the second received signal strength data, or may correct both of them.
The correction unit 34 may correct the ratio of the first received signal strength data to the second received signal strength data so that the ratio after the correction is smaller than that before the correction.

・補正部３４は、省略されてもよく、位置判定において補正前のデータＤａ，Ｄｂ，Ｄｃが比較されてもよい。
・データＤａ，Ｄｂ，Ｄｃは、受信信号強度Ａ，Ｂ，Ｃの平均値に限定されず、受信信号強度Ａ，Ｂ，Ｃそのものであってもよいし、中央値又は最大値であってもよい。すなわち、受信信号強度Ａ，Ｂ，Ｃに関するデータであればよい。 The correction unit 34 may be omitted, and the data Da, Db, and Dc before correction may be compared in the position determination.
The data Da, Db, and Dc are not limited to the average value of the received signal strengths A, B, and C, and may be the received signal strengths A, B, and C themselves, or may be the median value or the maximum value. good. That is, the data may be data relating to the received signal strengths A, B, and C.

・位置判定部３１は、少なくとも室外通信部１６及び端末２の通信で得た受信信号強度データと、室内通信部１７及び端末２の通信で得た受信信号強度データとの大小比較の結果から、位置判定を行えばよい。例えば、「Ｄａ＞Ｄｃ、且つＤｃ＞Ｄｂ」が成り立つ場合に、エリアＥａと判定するようにしてもよいし、「Ｄｂ＞Ｄｃ、且つＤｃ＞Ｄａ」が成り立つ場合にエリアＥｂに端末２が位置すると判定するようにしてもよい。すなわち、エリアの判定方法は特に限定されない。 The position determination unit 31 is based on the result of magnitude comparison between the received signal strength data obtained by communication between the outdoor communication unit 16 and the terminal 2 and the received signal strength data obtained by the communication between the indoor communication unit 17 and the terminal 2. The position may be determined. For example, if "Da> Dc and Dc> Db" is satisfied, it may be determined as the area Ea, or if "Db> Dc and Dc> Da" is satisfied, the terminal 2 is located in the area Eb. Then, it may be determined. That is, the area determination method is not particularly limited.

・位置判定部３１は、端末２が車両１のどのエリアに位置するかを判定してもよいし、室内外のどちらに位置するかを判定してもよい。また、端末２が車両１の前側及び後側のどちらにあるかを判定するようにしてもよい。 -The position determination unit 31 may determine in which area of the vehicle 1 the terminal 2 is located, or may determine whether the terminal 2 is located indoors or outdoors. Further, it may be determined whether the terminal 2 is on the front side or the rear side of the vehicle 1.

・電波Ｓｄの送信間隔は、特に限定されず、位置判定システム３０の仕様に応じて適宜変更してもよい。
・電波Ｓｄには、電波送信元の通信部ＩＤが含まれていなくてもよい。例えば、位置判定部３１は、電波Ｓｄの送信タイミングを制御して、受信信号強度の測定結果を受信したタイミングからどの通信部の測定結果なのかを識別してもよいし、電波Ｓｄを送信したアンテナにより測定結果を受信することで識別してもよい。 The transmission interval of the radio wave Sd is not particularly limited, and may be appropriately changed according to the specifications of the position determination system 30.
-The radio wave Sd does not have to include the communication unit ID of the radio wave transmission source. For example, the position determination unit 31 may control the transmission timing of the radio wave Sd to identify which communication unit is the measurement result from the timing at which the measurement result of the received signal strength is received, or transmit the radio wave Sd. It may be identified by receiving the measurement result by the antenna.

・室外通信部１６及び室内通信部１７の各々で、周波数が異なる電波Ｓｄの群を一度に送信する態様としてもよい。
・電波Ｓｄは、端末２側から送信されてもよい。 A group of radio waves Sd having different frequencies may be transmitted at once by each of the outdoor communication unit 16 and the indoor communication unit 17.
-The radio wave Sd may be transmitted from the terminal 2 side.

・測定部３２は、複数の電波Ｓｄの群からその平均値を算出し、車両１側へ通知してもよい。すなわち、受信信号強度データの算出は、車両１側及び端末２側のどちらで行われてもよい。 -The measuring unit 32 may calculate the average value from a group of a plurality of radio waves Sd and notify the vehicle 1 side. That is, the calculation of the received signal strength data may be performed on either the vehicle 1 side or the terminal 2 side.

・測定部３２は、車両１側に設けられてもよい。これは、端末２側から電波Ｓｄが送信される態様に適用できる。
・複数送信される電波Ｓｄの各周波数は、ＢＬＥ通信の周波数ホッピングから決まるチャネルに限定されない。 The measuring unit 32 may be provided on the vehicle 1 side. This can be applied to a mode in which the radio wave Sd is transmitted from the terminal 2 side.
-Each frequency of the radio wave Sd transmitted a plurality is not limited to the channel determined by the frequency hopping of the BLE communication.

・電波Ｓｄは、異なる複数の周波数で送信されることに限定されず、単一の周波数で送信されてもよい。
・電波Ｓｄは、室外通信部１６及び室内通信部１７の各々から、複数送信されることに限定されず、単一の電波Ｓｄが送信されてもよい。 -The radio wave Sd is not limited to being transmitted at a plurality of different frequencies, and may be transmitted at a single frequency.
The radio wave Sd is not limited to being transmitted from each of the outdoor communication unit 16 and the indoor communication unit 17, and a single radio wave Sd may be transmitted.

・電波Ｓｄは、位置検出のために送信される位置検出信号でもよいし、アドバタイズメッセージでもよいし、認証システム３において送信される他の信号であってもよい。すなわち、電波Ｓｄは、本実施形態に限定されない。 The radio wave Sd may be a position detection signal transmitted for position detection, an advertisement message, or another signal transmitted in the authentication system 3. That is, the radio wave Sd is not limited to this embodiment.

・位置判定の基準となる大小関係は、本実施形態に限定されず、例えば車両１に位置判定システム３０が実装された状態で実験された結果などを基に、適宜変更可能である。
・室内通信部１７は、センターコンソール、運転席の下側、又は助手席の下側のいずれに配置されてもよいし、室内において他の場所に配置されてもよい。 The magnitude relationship that serves as a reference for position determination is not limited to this embodiment, and can be appropriately changed based on, for example, the results of an experiment in which the position determination system 30 is mounted on the vehicle 1.
The indoor communication unit 17 may be arranged at the center console, under the driver's seat, or under the passenger seat, or may be arranged at another place in the room.

・室内通信部１７が配置される床面４４ａの近傍とは、例えば透過部材４５の下側の見切り線４５ａよりも下側から、床面４４ａまでの位置であってもよい。また、床面４４ａの近傍には、床面４４ａの下側において室内の空間に通じる場所が含まれてもよい。例えば、運転席や助手席などのシートレールの溝内に配置されてもよい。 The vicinity of the floor surface 44a where the indoor communication unit 17 is arranged may be, for example, a position from the lower side of the parting line 45a on the lower side of the transmissive member 45 to the floor surface 44a. Further, the vicinity of the floor surface 44a may include a place leading to the indoor space under the floor surface 44a. For example, it may be arranged in a groove of a seat rail such as a driver's seat or a passenger seat.

・透過部材は、ガラス部材に限定されず、例えば樹脂材料からなる部材でもよい。
・室内通信部１７は、床面４４ａの近傍に設けられることに限定されず、室内において天井やインストルメントパネルなどに設けられてもよい。また、天井などに設ける場合、室外に位置する端末２と室内通信部１７との間の伝搬経路上で電波Ｓｄが回折するように、障害物を設けてもよい。 -The transmissive member is not limited to the glass member, and may be a member made of, for example, a resin material.
The indoor communication unit 17 is not limited to being provided in the vicinity of the floor surface 44a, and may be provided on the ceiling, instrument panel, or the like indoors. Further, when it is provided on the ceiling or the like, an obstacle may be provided so that the radio wave Sd is diffracted on the propagation path between the terminal 2 located outside the room and the indoor communication unit 17.

・障害物は、車両ドア１０やボディ部品４０に限定されず、車両１に設けられる他の部品、例えばシート部材や、ルーフ部材、センターコンソールなどであってもよい。
・室外通信部１６は、フロントフェンダ４１の内面４１ｂに設けられることに限定されず、例えば内部部品５０側に固定されてもよいし、タイヤハウスカバー４３に取り付けられてもよい。すなわち、フロントフェンダ４１の内部において、室内通信部１７の取り付けられる位置は特に限定されず、例えば受信信号強度の損失に応じて適宜変更できる。 -The obstacle is not limited to the vehicle door 10 and the body component 40, and may be other components provided in the vehicle 1, such as a seat member, a roof member, and a center console.
The outdoor communication unit 16 is not limited to being provided on the inner surface 41b of the front fender 41, and may be fixed to the internal component 50 side or may be attached to the tire house cover 43, for example. That is, the position where the indoor communication unit 17 is attached is not particularly limited inside the front fender 41, and can be appropriately changed according to, for example, the loss of the received signal strength.

・室外通信部１６が配置されるフロントフェンダ４１の内部には、フロントフェンダ４１、内部部品５０、及びタイヤハウスカバー４３に囲われた空間が含まれてもよいし、当該空間に連通する他の空間が含まれてもよい。したがって、フロントフェンダ４１の内部は、本実施形態に限定されない。 -The inside of the front fender 41 in which the outdoor communication unit 16 is arranged may include a space surrounded by the front fender 41, the internal parts 50, and the tire house cover 43, or another space communicating with the space. Space may be included. Therefore, the inside of the front fender 41 is not limited to this embodiment.

・室内通信部１７の個数は特に限定されず、１つでもよいし、２つでもよいし、３つ以上でもよい。
・室外通信部１６の個数は特に限定されず、１つでもよいし、２つでもよいし、３つ以上でもよい。 -The number of indoor communication units 17 is not particularly limited, and may be one, two, or three or more.
-The number of the outdoor communication units 16 is not particularly limited, and may be one, two, or three or more.

・認証システム３及び位置判定システム３０の通信規格や帯域は、実施例に限定されず、例えばＷｉ−Ｆｉ（登録商標）やＺｉｇＢｅｅ（登録商標）を用いてもよい。またこれらシステムの間で異なる帯域を使用してもよい。 The communication standards and bands of the authentication system 3 and the position determination system 30 are not limited to the examples, and for example, Wi-Fi (registered trademark) or ZigBee (registered trademark) may be used. Also, different bands may be used between these systems.

・一連の認証において、ＩＤ照合と端末２の位置検出の順番は特に限定されない。例えば、位置検出の後にＩＤ照合を行ってもいいし、ＩＤ照合と位置検出との実行期間が重なるように行ってもよい。 -In a series of authentications, the order of ID verification and position detection of the terminal 2 is not particularly limited. For example, ID collation may be performed after position detection, or the execution periods of ID collation and position detection may overlap.

・位置判定システム３０は、認証システム３に組み込まれるものに限定されず、車両１に単独で実装されてもよい。
・端末２は、スマートフォンに限定されず、車両１に紐付けられた電子キーであってもよい。また、タブレットコンピュータやラップトップコンピュータ等の他のスマートデバイスであってもよい。 The position determination system 30 is not limited to the one incorporated in the authentication system 3, and may be independently mounted in the vehicle 1.
-The terminal 2 is not limited to the smartphone, and may be an electronic key associated with the vehicle 1. It may also be another smart device such as a tablet computer or laptop computer.

・照合ＥＣＵ４は、コンピュータプログラム（ソフトウェア）に従って各種処理を実行する１つ以上のプロセッサ、各種処理のうち少なくとも一部の処理を実行する、特定用途向け集積回路（ASIC:Application Specific Integrated Circuit）等の１つ以上の専用のハードウェア回路、或いはそれらの組み合わせ、を含む回路（circuitry）として構成し得る。プロセッサは、ＣＰＵ（Central Processing Unit）並びに、ＲＡＭ（Random Access Memory）及びＲＯＭ（Read Only Memory）等のメモリを含み、メモリは、処理をＣＰＵに実行させるように構成されたプログラムコードまたは指令を格納している。メモリすなわちコンピュータ可読媒体は、汎用または専用のコンピュータでアクセスできるあらゆる利用可能な媒体を含む。 The collation ECU 4 includes one or more processors that execute various processes according to a computer program (software), an integrated circuit for specific applications (ASIC: Application Specific Integrated Circuit) that executes at least a part of the various processes, and the like. It can be configured as a circuitry that includes one or more dedicated hardware circuits, or a combination thereof. The processor includes a CPU (Central Processing Unit) and a memory such as a RAM (Random Access Memory) and a ROM (Read Only Memory), and the memory stores a program code or a command configured to cause the CPU to execute processing. is doing. Memory or computer-readable media includes any available medium accessible by a general purpose or dedicated computer.

１…車両、２…端末、１６…室外通信部、１６ａ…第１室外通信部、１６ｂ…第２室外通信部、１７…室内通信部、３０…位置判定システム、３１…位置判定部、３２…測定部、３３…データ取得部、３４…補正部、４０…ボディ部品、４１…フロントフェンダ、４１ａ…外面、４１ｂ…内面、４３…タイヤハウスカバー、４４…車室、４４ａ…床面、４５…透過部材。 1 ... vehicle, 2 ... terminal, 16 ... outdoor communication unit, 16a ... first outdoor communication unit, 16b ... second outdoor communication unit, 17 ... indoor communication unit, 30 ... position determination system, 31 ... position determination unit, 32 ... Measurement unit, 33 ... Data acquisition unit, 34 ... Correction unit, 40 ... Body parts, 41 ... Front fender, 41a ... Outer surface, 41b ... Inner surface, 43 ... Tire house cover, 44 ... Vehicle interior, 44a ... Floor surface, 45 ... Transmissive member.

Claims (9)

車両の室外に設けられた室外通信部と端末の間、及び前記車両の室内に設けられた室内通信部と前記端末との間の各々で、電波が通信されて受信信号強度が測定された場合に、これら前記受信信号強度の受信信号強度データを取得するデータ取得部と、
前記室外通信部及び前記端末の通信で得た前記受信信号強度データと、前記室内通信部及び前記端末の通信で得た前記受信信号強度データとの大小比較の結果から、前記端末が、前記車両の室外及び室内のどちらに位置するかを判定する位置判定部と、を備え、
前記室外通信部は、前記車両のフロントフェンダの内部に配置されている位置判定システム。 When radio waves are communicated and the received signal strength is measured between the outdoor communication unit and the terminal provided outside the vehicle and between the indoor communication unit and the terminal provided inside the vehicle. In addition, a data acquisition unit that acquires the received signal strength data of the received signal strength, and
From the result of magnitude comparison between the received signal strength data obtained by the communication of the outdoor communication unit and the terminal and the received signal strength data obtained by the communication of the indoor communication unit and the terminal, the terminal is the vehicle. It is equipped with a position determination unit that determines whether it is located outdoors or indoors.
The outdoor communication unit is a position determination system arranged inside the front fender of the vehicle. 前記室外通信部は、前記フロントフェンダにおいて、前記車両の外部に露出する外面とは反対の内面に設けられている
請求項１に記載の位置判定システム。 The position determination system according to claim 1, wherein the outdoor communication unit is provided on the inner surface of the front fender opposite to the outer surface exposed to the outside of the vehicle. 前記室外通信部は、前記車両における車幅方向の両側に設けられた前記フロントフェンダの内部にそれぞれ設けられ、
前記位置判定部は、前記車幅方向の一方側の前記室外通信部と前記端末との通信で得た前記受信信号強度データと、前記車幅方向の他方側の前記室外通信部と前記端末との通信で得た前記受信信号強度データと、前記室内通信部と前記端末との通信で得た前記受信信号強度データとの大小比較により、前記車両の室外において前記車幅方向の一方側のエリア、前記車両の室外において前記車幅方向の他方側のエリア、及び前記車両の室内のエリアのうちいずれのエリアに前記端末が位置するかを判定する
請求項１又は請求項２に記載の位置判定システム。 The outdoor communication unit is provided inside the front fenders provided on both sides of the vehicle in the vehicle width direction.
The position determination unit includes the received signal strength data obtained by communication between the outdoor communication unit on one side in the vehicle width direction and the terminal, and the outdoor communication unit and the terminal on the other side in the vehicle width direction. By comparing the magnitude of the received signal strength data obtained by the communication of the above and the received signal strength data obtained by the communication between the indoor communication unit and the terminal, the area on one side in the vehicle width direction outside the vehicle. The position determination according to claim 1 or 2, wherein the terminal is located in any of the area on the other side in the vehicle width direction outside the vehicle and the area inside the vehicle. system. 前記電波は、前記室外通信部と前記端末との間、及び前記室内通信部と前記端末との間の各々で、複数の異なる周波数で通信される
請求項１から請求項３のうちいずれか一項に記載の位置判定システム。 Any one of claims 1 to 3 in which the radio wave is communicated between the outdoor communication unit and the terminal and between the indoor communication unit and the terminal at a plurality of different frequencies. The position determination system described in the section. 前記受信信号強度データは、前記室外通信部と前記端末との間、及び前記室内通信部と前記端末との間の各々で、複数測定された前記受信信号強度の平均値を含む
請求項１から請求項４のうちいずれか一項に記載の位置判定システム。 The received signal strength data is from claim 1 including a plurality of measured average values of the received signal strength between the outdoor communication unit and the terminal and between the indoor communication unit and the terminal. The position determination system according to any one of claims 4. 前記車両には、前記電波を遮蔽する障害物が設けられ、
前記室内通信部は、前記車両の室外に位置する前記端末との間で通信する場合に、前記障害物によって、前記電波の前記受信信号強度が低下するような位置に設けられている
請求項１から請求項５のうちいずれか一項に記載の位置判定システム。 The vehicle is provided with an obstacle that shields the radio waves.
Claim 1 is provided at a position where the indoor communication unit is provided at a position where the received signal strength of the radio wave is lowered by the obstacle when communicating with the terminal located outside the vehicle. The position determination system according to any one of claims 5. 前記車両には、前記電波を透過する透過部材が、前記車両の車高方向において前記車両の床面から離隔して配置されるように設けられ、
前記室内通信部は、前記床面の近傍に設けられている
請求項６に記載の位置判定システム。 The vehicle is provided with a transmissive member that transmits the radio waves so as to be arranged so as to be separated from the floor surface of the vehicle in the vehicle height direction of the vehicle.
The position determination system according to claim 6, wherein the indoor communication unit is provided in the vicinity of the floor surface. 前記室外通信部及び前記端末の通信で得た前記受信信号強度データとしての第１受信信号強度データと、前記室内通信部及び前記端末の通信で得た前記受信信号強度データとしての第２受信信号強度データとのうち少なくとも一方を補正する補正部を備え、
前記補正部は、前記第２受信信号強度データに対する前記第１受信信号強度データの比を、補正前より補正後の方が大きくなるように補正する
請求項１から請求項７のうちいずれか一項に記載の位置判定システム。 The first received signal strength data as the received signal strength data obtained by the communication of the outdoor communication unit and the terminal, and the second received signal as the received signal strength data obtained by the communication of the indoor communication unit and the terminal. Equipped with a correction unit that corrects at least one of the intensity data
The correction unit is any one of claims 1 to 7 that corrects the ratio of the first received signal strength data to the second received signal strength data so that the ratio of the first received signal strength data is larger after the correction than before the correction. The position determination system described in the section. 前記補正部は、前記第１受信信号強度データと前記第２受信信号強度データとの少なくとも一方を、補正量によって補正し、
前記補正量は、前記電波の伝搬経路において、前記フロントフェンダの内部と前記車両の外部との間で伝搬する際に生じる前記受信信号強度の損失を補うように設定されている
請求項８に記載の位置判定システム。 The correction unit corrects at least one of the first received signal strength data and the second received signal strength data according to the correction amount.
8. The correction amount is set according to claim 8, wherein the correction amount is set so as to compensate for the loss of the received signal strength that occurs when propagating between the inside of the front fender and the outside of the vehicle in the propagation path of the radio wave. Position determination system.
JP2020107998A 2020-06-23 2020-06-23 Position determination system Pending JP2022003318A (en)

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