JP6024361B2 - Non-contact power feeding device - Google Patents

Non-contact power feeding device Download PDF

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JP6024361B2
JP6024361B2 JP2012223778A JP2012223778A JP6024361B2 JP 6024361 B2 JP6024361 B2 JP 6024361B2 JP 2012223778 A JP2012223778 A JP 2012223778A JP 2012223778 A JP2012223778 A JP 2012223778A JP 6024361 B2 JP6024361 B2 JP 6024361B2
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power feeding
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photoelectric sensor
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久保田　哲史
哲史 久保田
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Nissan Motor Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、電気自動車等の車両への電力供給を非接触で行う非接触給電装置に関する。   The present invention relates to a non-contact power supply apparatus that performs non-contact power supply to a vehicle such as an electric vehicle.

特許文献１には、駐車スペースに給電部として一次コイルを設け、車両に受電部として二次コイルを設けて、一次コイルから電磁誘導作用により二次コイルに電力供給を受け、該二次コイルによる受電電力で車両に搭載したバッテリを充電するようにした技術が開示されている。   In Patent Document 1, a primary coil is provided as a power feeding unit in a parking space, a secondary coil is provided as a power receiving unit in a vehicle, and power is supplied from the primary coil to the secondary coil by electromagnetic induction. A technique is disclosed in which a battery mounted on a vehicle is charged with received power.

特開２０１０−２２６９４５号公報JP 2010-226945 A

特許文献１の開示技術では、車両を駐車スペースに一次コイルと二次コイルとが正対する適正な給電ポジションに駐車したとしても、パーキングブレーキの掛け忘れ、あるいはパーキングブレーキが不適正で給電中に車両が前後方向にずれ動いて位置ずれが生じると、給電不足を誘発する可能性がある。   In the disclosed technique of Patent Document 1, even if the vehicle is parked in the parking space at an appropriate power supply position where the primary coil and the secondary coil are directly facing each other, the vehicle is not supplied with the parking brake or the parking brake is inappropriate and the vehicle is being powered. If the position shifts in the front-rear direction, there is a possibility that insufficient power supply will be induced.

そこで、本発明は給電中に車両が駐車スペースで前後方向にずれ動いて位置ずれを生じた場合に、これを速やかに検出できて警告あるいは給電停止を促すことができる非接触給電装置を提供するものである。   Therefore, the present invention provides a non-contact power feeding device that can quickly detect a vehicle when a vehicle is displaced in the front-rear direction in a parking space and causes a positional shift during power feeding and can prompt a warning or stop power feeding. Is.

本発明の非接触給電装置は、駐車スペースに設置した給電部と、車両に搭載した受電部との磁気的結合によって、車両に対して非接触で電力供給を行う構成を基本としている。   The non-contact power supply apparatus of the present invention is basically configured to supply power to a vehicle in a non-contact manner by magnetic coupling between a power supply unit installed in a parking space and a power receiving unit mounted on the vehicle.

この非接触給電装置は、前記駐車スペースの前記給電部に対して受電部がほぼ正対する給電ポジションに駐車した車両の進入側端部と、その対向位置との相互に配置された投・受光器と反射板とを備えて、該反射板に入射した反射光を測定して車両の位置ずれを検出する光電センサを備えている。   This non-contact power feeding device is configured such that a vehicle-side entry side end portion of a vehicle parked at a power feeding position where a power receiving unit faces the power feeding unit of the parking space, and a projecting / light-receiving device disposed opposite to each other. And a reflecting plate, and a photoelectric sensor that detects the positional deviation of the vehicle by measuring the reflected light incident on the reflecting plate.

そして、この光電センサの反射板を、前記給電部に対する受電部の車幅方向および上下方向の位置ずれ許容範囲に相当する大きさに面積設定したことを主要な特徴としている。   The main feature of the photoelectric sensor is that the reflecting plate has an area set to a size corresponding to an allowable range of displacement in the vehicle width direction and the vertical direction of the power receiving unit with respect to the power feeding unit.

本発明によれば、パーキングブレーキの掛け忘れ等、何等かの理由で給電中に車両が前後方向にずれ動いた場合は、給電部に対して受電部が前後方向に、および場合によっては車幅方向にも位置ずれを生じるが、これを反射型の光電センサにより車両の位置ずれとして速やかに検出できるため、警告あるいは給電停止を促して給電不良を誘発するのを回避することができる。   According to the present invention, when the vehicle is displaced in the front-rear direction during power feeding for some reason, such as forgetting to apply the parking brake, the power receiving unit is moved in the front-rear direction with respect to the power feeding unit, and in some cases the vehicle width. Although a positional deviation also occurs in the direction, this can be promptly detected as a positional deviation of the vehicle by a reflective photoelectric sensor, so that it is possible to avoid a warning or a power feeding stop and induce a power feeding failure.

また、給電中に何等かの理由で車高が変化して上下方向に位置ずれが生じた場合にあっても、同様に光電センサの検出作用により、速やかに警告あるいは給電停止を促すことができる。   Also, even when the vehicle height changes for some reason during power feeding and a vertical displacement occurs, it is possible to promptly prompt a warning or stop power feeding by the detection action of the photoelectric sensor. .

本発明に係る非接触給電装置を概略的に示す説明図。Explanatory drawing which shows schematically the non-contact electric power feeder which concerns on this invention. 本発明の一実施形態の要部を示す略示的説明図。BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which shows the principal part of one Embodiment of this invention.

以下、本発明の一実施形態を図面と共に詳述する。   Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

図１に示す本実施形態の非接触給電装置は、地上側ユニットである給電装置１００と、車両側ユニットである受電装置２００と、を備え、給電スタンド等に設置される給電装置１００から、電気自動車やハイブリッド車に代表される車両１に搭載された受電装置２００に非接触で電力を供給し、車載バッテリ２７を充電するものである。   The non-contact power feeding device of the present embodiment shown in FIG. 1 includes a power feeding device 100 that is a ground side unit and a power receiving device 200 that is a vehicle side unit. Electric power is supplied in a non-contact manner to a power receiving device 200 mounted on a vehicle 1 typified by an automobile or a hybrid vehicle, and the vehicle battery 27 is charged.

給電装置１００は、給電スタンド近傍の駐車スペース２に設置した給電部１２を備え、受電装置２００は、車両１を駐車スペース２の所定位置に止めたときに給電部１２（図２参照）に対向するように車両１の底面に配設した受電部２２を備えている。   The power feeding device 100 includes a power feeding unit 12 installed in the parking space 2 near the power feeding stand, and the power receiving device 200 faces the power feeding unit 12 (see FIG. 2) when the vehicle 1 is stopped at a predetermined position in the parking space 2. Thus, a power receiving unit 22 disposed on the bottom surface of the vehicle 1 is provided.

車両１は、図示は省略したが適宜の駐車誘導規制手段により、駐車スペース２への例えば後退移動を誘導し、給電部１２に対して受電部２２が正対する適正な給電ポジションに誘導して駐車位置が規制される。この駐車誘導規制手段としては、例えば、前述の特許文献１に開示された駐車スペース後方の位置決めマーカーと、これを撮像する車載カメラとの組合わせを用いることができる。   Although not shown, the vehicle 1 is guided by, for example, a backward movement to the parking space 2 by an appropriate parking guidance restricting unit, and is guided to an appropriate power feeding position where the power receiving unit 22 faces the power feeding unit 12. The position is restricted. As this parking guidance control means, for example, a combination of a positioning marker at the rear of the parking space disclosed in Patent Document 1 described above and an in-vehicle camera that captures the image can be used.

そして、駐車スペース２の後方、例えば、上述の給電装置１００が組込まれる給電スタンドもしくはその近傍と、駐車スペース２に駐車した車両１の進入側端部、例えば、本実施形態では車両１を後退移動して駐車スペース２に駐車するものとして、当該車両１の後端部外板との相互に、車両１の位置ずれを検出する光電センサ３を設けてある。   Then, behind the parking space 2, for example, the power supply stand in which the above-described power supply device 100 is incorporated or the vicinity thereof, and the entry side end of the vehicle 1 parked in the parking space 2, for example, the vehicle 1 is moved backward in this embodiment. In order to park in the parking space 2, a photoelectric sensor 3 for detecting a positional shift of the vehicle 1 is provided between the rear end portion outer plate of the vehicle 1.

この光電センサ３は、図２に示すように駐車スペース２の後方に設けた投・受光器３Ａと、これと対向する車両１の後端部外板に設けた反射板３Ｂと、からなる反射型光電センサが用いられる。   As shown in FIG. 2, the photoelectric sensor 3 includes a projector / receiver 3 </ b> A provided behind the parking space 2, and a reflector 3 </ b> B provided on a rear end portion outer plate of the vehicle 1 facing the photoelectric sensor 3 </ b> A. A type photoelectric sensor is used.

この光電センサ３は、投・受光器３Ａから出射したレーザー光，赤外線等の投光Ｌ１が反射板３Ｂに反射して投・受光器３Ａに回帰する反射光Ｌ２を測定して車両１の位置ずれ、即ち、給電部１２に対する受電部２２の位置ずれを電気的に検出するものである。 The photoelectric sensor 3 measures the reflected light L 2 that is reflected from the light projection L 1 such as laser light and infrared light emitted from the light projecting / receiving device 3 A and reflected back to the reflecting plate 3 B, and returns to the light projecting / receiving device 3 A. That is, the positional deviation of the power receiving unit 22 with respect to the power feeding unit 12 is electrically detected.

具体的には、投光Ｌ１から反射光Ｌ２に至る反射時間から車両１の前後方向の相対距離を測定して車両１の前後方向の位置ずれを検出し、反射光Ｌ２の光量の減少変化をもって車幅方向の位置ずれを検出する。 Specifically, by measuring the front-rear direction of the relative distance of the vehicle 1 from the reflection time to reach the reflected light L 2 from the light L 1 detects the longitudinal position deviation of the vehicle 1, the amount of the reflected light L 2 A position shift in the vehicle width direction is detected with a decreasing change.

ここで、上述の光電センサ３の反射板３Ｂは、給電部１２に対する受電部２２の車幅方向および上下方向の位置ずれ許容範囲に相当する大きさの面積に設定してある。   Here, the reflector 3 </ b> B of the photoelectric sensor 3 described above is set to an area having a size corresponding to the allowable positional deviation range in the vehicle width direction and the vertical direction of the power receiving unit 22 with respect to the power feeding unit 12.

給電部１２と受電部２２とは、両者の磁気的結合による電磁誘導作用を成立させるためには、相互の上下方向の離間距離はある一定値に厳しく求められることから上下方向の位置ずれ許容範囲は小さいが、車幅方向の位置ずれ許容範囲はこれよりも多少余裕があって大きくされていることは広く認識されている。   In order for the power feeding unit 12 and the power receiving unit 22 to establish an electromagnetic induction effect due to their magnetic coupling, the vertical separation distance between them is strictly required to be a certain value, so that the vertical displacement tolerance range is Although it is small, it is widely recognized that the positional deviation allowable range in the vehicle width direction is increased with some margin.

そこで、反射板３Ｂは上述の上下方向の位置ずれ許容範囲内となる所要の縦幅寸法と、これよりも大きな車幅方向の位置ずれ許容範囲内となる所要の横幅寸法とからなる所要面積の横長形状、例えば、横楕円形，長円形，長方形等に形成してある。   Therefore, the reflecting plate 3B has a required area of a required vertical width within the above-described vertical displacement allowable range and a required lateral width within the vehicle width-direction allowable displacement larger than this. It is formed in a horizontally long shape, for example, a horizontal ellipse, an oval, a rectangle or the like.

本実施形態では、上述の反射型の光電センサ３に加えて、投・受光器４Ａと反射板４Ｂとからなるもう１つの反射型の光電センサ４を並設してある。   In the present embodiment, in addition to the reflection type photoelectric sensor 3 described above, another reflection type photoelectric sensor 4 including a light projecting / receiving device 4A and a reflection plate 4B is provided in parallel.

この光電センサ４の反射板４Ｂは、光電センサ３の反射板３Ｂよりも縦幅寸法，横幅寸法を小さくした小面積に設定して、両光電センサ３，４の協働によって車両１の上下方向および車幅方向の位置ずれ検出精度を高められるようにしている。   The reflecting plate 4B of the photoelectric sensor 4 is set to a small area with a smaller vertical and horizontal dimensions than the reflecting plate 3B of the photoelectric sensor 3, and the vertical direction of the vehicle 1 is obtained by the cooperation of the photoelectric sensors 3 and 4. In addition, it is possible to improve the accuracy of detecting the displacement in the vehicle width direction.

図２に示す例では、光電センサ３と４とを車幅方向に並設してあるが、これは上下方向に並設してもよい。   In the example shown in FIG. 2, the photoelectric sensors 3 and 4 are juxtaposed in the vehicle width direction, but they may be juxtaposed in the vertical direction.

ここで、前記給電部１２として導電線からなる一次コイルを主体とした送電コイルが用いられ、また、受電部２２として同じく導電線からなる二次コイルを主体とした受電コイルが用いられ、両コイル間における電磁誘導作用により、送電コイル１２から受電コイル２２へ非接触に電力を供給可能としている。   Here, a power transmission coil mainly composed of a primary coil made of a conductive wire is used as the power feeding section 12, and a power receiving coil mainly composed of a secondary coil made of the same conductive wire is used as the power receiving section 22, both coils. The electric power can be supplied from the power transmission coil 12 to the power reception coil 22 in a non-contact manner due to the electromagnetic induction action between them.

地上側の給電装置１００は、電力制御部１１と、送電コイル１２と、無線通信部１３と、制御部１４と、を備えている。   The ground-side power supply device 100 includes a power control unit 11, a power transmission coil 12, a wireless communication unit 13, and a control unit 14.

電力制御部１１は、交流電源３００から送電される交流電力を、高周波の交流電力に変換し、送電コイル１２に送電するための回路で、整流部１１１と、ＰＦＣ回路１１２と、インバータ１１３と、センサ１１４と、を備えている。整流部１１１は、交流電源３００に電気的に接続され、交流電源３００からの出力交流電力を整流する回路である。ＰＦＣ回路１１２は、整流部１１１からの出力波形を整形することで力率を改善するための回路（Ｐｏｗｅｒ Ｆａｃｔｏｒ Ｃｏｒｒｅｃｔｉｏｎ）であり、整流部１１１とインバータ１１３との間に接続されている。   The power control unit 11 is a circuit for converting AC power transmitted from the AC power source 300 into high-frequency AC power and transmitting the AC power to the power transmission coil 12. The rectification unit 111, the PFC circuit 112, the inverter 113, Sensor 114. The rectifying unit 111 is a circuit that is electrically connected to the AC power supply 300 and rectifies the output AC power from the AC power supply 300. The PFC circuit 112 is a circuit (Power Factor Correction) for improving the power factor by shaping the output waveform from the rectifying unit 111, and is connected between the rectifying unit 111 and the inverter 113.

無線通信部１３は、車両１側に設けられた無線通信部２３と双方向に通信を行う。   The wireless communication unit 13 performs bidirectional communication with the wireless communication unit 23 provided on the vehicle 1 side.

制御部１４は、給電装置１００全体を制御する部分であり、無線通信部１３，２３間の通信により給電装置１００からの電力供給を開始する旨の信号を車両１側に送信したり、車両１側から給電装置１００からの電力を受給したい旨の信号を受信したりする。   The control unit 14 is a part that controls the entire power supply apparatus 100, and transmits a signal to the vehicle 1 side to start power supply from the power supply apparatus 100 through communication between the wireless communication units 13 and 23, or the vehicle 1. A signal indicating that the power from the power supply apparatus 100 is to be received is received from the side.

制御部１５は、この他に、センサ１１４の検出電流にもとづいてインバータ１１３のスイッチング制御を行い、送電コイル１２から送電される電力を制御する。また、給電中に上述の光電センサ３，４からの検出信号にもとづいて、給電停止を行い、あるいは無線通信部１３，２３を通じて車両１側に警告信号を送信する。   In addition to this, the control unit 15 performs switching control of the inverter 113 based on the detection current of the sensor 114 to control the power transmitted from the power transmission coil 12. Further, during power feeding, the power feeding is stopped based on the detection signals from the photoelectric sensors 3 and 4 described above, or a warning signal is transmitted to the vehicle 1 side through the wireless communication units 13 and 23.

車両１側の受電装置２００は、受電コイル２２と、無線通信部２３と、充電制御部２４と、整流部２５と、リレー部２６と、バッテリ２７と、インバータ２８と、モータ３０と、通知部３２と、を備えている。   The power receiving device 200 on the vehicle 1 side includes a power receiving coil 22, a wireless communication unit 23, a charging control unit 24, a rectifying unit 25, a relay unit 26, a battery 27, an inverter 28, a motor 30, and a notification unit. 32.

受電コイル２２は、上述のように車両１の底面（シャシ）等で、左右の後輪Ｗ間に設けられ、上述のように図外の駐車誘導規制手段により車両１が駐車スペース２の所定位置に誘導，規制されて駐車すると、送電コイル１２の直上に正対し、該送電コイル１２と距離を保って位置づけられる。   The power receiving coil 22 is provided between the left and right rear wheels W on the bottom surface (chassis) or the like of the vehicle 1 as described above, and the vehicle 1 is placed at a predetermined position in the parking space 2 by the parking guidance restricting means (not shown) as described above. When the vehicle is guided and regulated, the vehicle is positioned directly above the power transmission coil 12 and kept at a distance from the power transmission coil 12.

整流部２５は、受電コイル２２に接続され、受電コイル２２で受電された交流電力を直流に整流する整流回路により構成されている。   The rectification unit 25 is connected to the power reception coil 22 and is configured by a rectification circuit that rectifies AC power received by the power reception coil 22 into direct current.

リレー部２６は、充電制御部２４の制御によりオンおよびオフが切り換わるリレースイッチを備えている。また、リレー部２６は、リレースイッチをオフにすることで、バッテリ２７を含む強電系と、充電の回路部となる受電コイル２２および整流部２５の弱電系とを切り離す。   The relay unit 26 includes a relay switch that is switched on and off under the control of the charging control unit 24. Moreover, the relay part 26 isolate | separates the strong electric system containing the battery 27, and the receiving coil 22 used as the circuit part of charge, and the weak electric system of the rectification | straightening part 25 by turning off a relay switch.

バッテリ２７は、複数の二次電池を接続することで構成され、車両１の電力源となる。インバータ２８は、ＩＧＢＴ等のスイッチング素子を有したＰＷＭ制御回路等の制御回路であって、スイッチング制御信号にもとづいて、バッテリ２７から出力される直流電力を交流電力にし、モータ２９に供給する。モータ２９は、例えば三相の交流電動機により構成され、車両１を駆動させるための駆動源となる。   The battery 27 is configured by connecting a plurality of secondary batteries, and serves as a power source for the vehicle 1. The inverter 28 is a control circuit such as a PWM control circuit having a switching element such as an IGBT, and based on the switching control signal, the DC power output from the battery 27 is converted into AC power and supplied to the motor 29. The motor 29 is composed of, for example, a three-phase AC motor and serves as a drive source for driving the vehicle 1.

通知部３０は、警告ランプ、ナビゲーションシステムのディスプレイまたはスピーカ等により構成され、充電制御部２４による制御にもとづいて、ユーザに対して光、画像または音声等を出力する。   The notification unit 30 is configured by a warning lamp, a display of a navigation system, a speaker, or the like, and outputs light, an image, a sound, or the like to the user based on control by the charging control unit 24.

充電制御部２４は、バッテリ２７の充電を制御するためのコントローラであり、無線通信部２３、通知部３０、リレー部２６等を制御する。充電制御部２４は、充電を開始する旨の信号を、無線通信部２３，１３の通信により制御部１４に送信する。また、充電制御部２４は、車両１の全体を制御する図外のコントローラとＣＡＮ通信網で接続されている。このコントローラは、インバータ２８のスイッチング制御や、バッテリ２７の充電状態（ＳＯＣ）を管理する。そして、充電制御部２４は、このコントローラにより、バッテリ２７の充電状態にもとづいて満充電に達した場合に、充電を終了する旨の信号を制御部１４に送信する。   The charging control unit 24 is a controller for controlling the charging of the battery 27, and controls the wireless communication unit 23, the notification unit 30, the relay unit 26, and the like. The charging control unit 24 transmits a signal to start charging to the control unit 14 through communication of the wireless communication units 23 and 13. The charging control unit 24 is connected to a controller (not shown) that controls the entire vehicle 1 through a CAN communication network. This controller manages the switching control of the inverter 28 and the state of charge (SOC) of the battery 27. Then, when the controller reaches the full charge based on the charge state of the battery 27, the charge control unit 24 transmits a signal to the control unit 14 to end the charge.

従って、本実施形態の非接触給電装置では、送電コイル１２と受電コイル２２との間で、電磁誘導作用により非接触状態で高周波電力の送電および受電を行う。言い換えると、送電コイル１２に電圧が加わると、送電コイル１２と受電コイル２２との間には磁気的な結合が生じ、送電コイル１２から受電コイル２２へ電力が供給される。   Therefore, in the non-contact power feeding device of the present embodiment, high-frequency power is transmitted and received between the power transmission coil 12 and the power receiving coil 22 in a non-contact state by electromagnetic induction action. In other words, when a voltage is applied to the power transmission coil 12, magnetic coupling occurs between the power transmission coil 12 and the power reception coil 22, and power is supplied from the power transmission coil 12 to the power reception coil 22.

以上の構成からなる本実施形態の非接触給電装置によれば、駐車スペース２にその送電コイル１２に対して受電コイル２２がほぼ正対する適正な給電ポジションに駐車した車両１が、パーキングブレーキの掛け忘れ等、何等かの理由で給電中に前後方向にずれ動いた場合、給電コイル１２に対して受電コイル２２が前後方向に位置ずれを生じる。   According to the non-contact power feeding device of the present embodiment having the above-described configuration, the vehicle 1 parked in the parking space 2 at an appropriate power feeding position where the power receiving coil 22 faces the power transmitting coil 12 almost directly faces the parking brake. When the power receiving coil 22 shifts in the front-rear direction during power feeding for some reason, such as forgetting, the power receiving coil 22 is displaced in the front-rear direction with respect to the power feeding coil 12.

このとき、光電センサ３の投・受光器３Ａと反射板３Ｂとによる投光Ｌ１から反射光Ｌ２への反射回帰作用で求められる反射時間から、車両１の相対距離を測定して車両１の前後方向の位置ずれを検出する。この検出結果より、車両１の前後方向の位置ずれが、送電コイル１２に対する送電コイル２２の前後方向の位置ずれ許容範囲以上であった場合、制御部１４により直ちに警告あるいは給電停止を促して給電不良を誘発するのを回避することができる。 In this case, the reflection time obtained by the reflection return action of the reflected light L 2 from the light L 1 by the emitter and the receiver 3A of the photoelectric sensor 3 and the reflection plate 3B, the vehicle 1 by measuring the relative distance of the vehicle 1 The positional deviation in the front-rear direction is detected. From this detection result, when the positional deviation in the front-rear direction of the vehicle 1 is equal to or larger than the allowable positional deviation in the front-rear direction of the power transmission coil 22 with respect to the power transmission coil 12, the control unit 14 prompts a warning or power supply stop to immediately fail Can be avoided.

ここで、車両１の上述の前後方向のずれ動きは、受電コイル２２を搭載した車両後部の車幅方向の位置ずれを伴うこともあり、これにより、送電コイル１２に対する受電コイル２２の車幅方向の位置ずれが想定される。   Here, the above-described forward / backward displacement movement of the vehicle 1 may be accompanied by a displacement in the vehicle width direction of the rear portion of the vehicle on which the power receiving coil 22 is mounted, thereby causing the power receiving coil 22 to move in the vehicle width direction. Is assumed to be misaligned.

このような場合、車両１の前後方向の位置ずれが、送電コイル１２に対する受電コイル２２の前後方向の位置ずれ許容範囲内にあっても、車幅方向の位置ずれ許容範囲外であった場合にはやはり給電不良を誘発してしまう。   In such a case, even when the positional deviation in the front-rear direction of the vehicle 1 is within the allowable range of positional deviation in the front-rear direction of the power receiving coil 22 with respect to the power transmission coil 12, it is outside the allowable range of positional deviation in the vehicle width direction. Still induces power failure.

しかし、反射板３Ｂは送電コイル１２に対する受電コイル２２の車幅方向の位置ずれ許
容範囲に相当する横幅寸法を備えているため、車両１がこの許容範囲を越えて車幅方向に位置ずれした場合には、光電センサ３がこれを直ちに検出する。 However, since the reflecting plate 3B has a width dimension corresponding to a positional deviation allowable range in the vehicle width direction of the power receiving coil 22 with respect to the power transmission coil 12, the vehicle 1 is displaced in the vehicle width direction beyond the allowable range. The photoelectric sensor 3 immediately detects this.

即ち、この車両１の車幅方向の位置ずれは反射板３Ｂからの反射光Ｌ２の光量の変化から検出され、反射板３Ｂが車幅方向に位置ずれして反射光Ｌ２の光量が正規位置における光量よりも減少すると、この光量の低減変化をもって車両１の車幅方向の位置ずれを検出する。 That is, the position deviation of the vehicle width direction of the vehicle 1 is detected from the change of the light amount of the reflected light L 2 from the reflection plate 3B, reflector 3B is the amount of light to the reflected light L 2 displaced in the vehicle width direction normal When the amount of light is smaller than the light amount at the position, a positional shift in the vehicle width direction of the vehicle 1 is detected with the reduction change of the light amount.

このように、送電コイル１２に対する給電コイル２２の前後方向およびまたは車幅方向の位置ずれを、反射型の光電センサ３により車両１の位置ずれとして速やかに検出して警告あるいは給電停止を促すことができる。   In this manner, the positional deviation of the power feeding coil 22 with respect to the power transmission coil 12 in the front-rear direction and / or the vehicle width direction is promptly detected as the positional deviation of the vehicle 1 by the reflective photoelectric sensor 3 to prompt a warning or stop power feeding. it can.

ここで、車両１が駐車スペース２の適正な給電ポイントに駐車してあっても、何等かの理由により車高が変化して送電コイル１２に対して受電コイル２２が上下方向に位置ずれすることも想定される。   Here, even if the vehicle 1 is parked at an appropriate feeding point in the parking space 2, the vehicle height changes for some reason, and the power receiving coil 22 is displaced in the vertical direction with respect to the power transmitting coil 12. Is also envisaged.

この場合であっても、上述の反射板３Ｂは送電コイル１２に対する受電コイル２２の上下方向の位置ずれ許容範囲に相当する縦幅寸法を備えているため、車両１がこの許容範囲を越えて上下方向の位置ずれした場合には、光電センサ３がこれを直ちに検出して、上述と同様に速やかに警告あるいは給電停止を促せることができる。   Even in this case, the reflecting plate 3B described above has a vertical width dimension that corresponds to the vertical displacement allowable range of the power receiving coil 22 with respect to the power transmitting coil 12, so that the vehicle 1 moves vertically beyond the allowable range. When the position is misaligned, the photoelectric sensor 3 can immediately detect it and promptly prompt a warning or stop power supply as described above.

本実施形態では上述の光電センサ３に加えて同様の光電センサ４を並設してあって、該光電センサ４の反射板４Ｂの面積を光電センサ３の反射板３Ｂの面積よりも小さく設定してある。   In the present embodiment, in addition to the above-described photoelectric sensor 3, a similar photoelectric sensor 4 is provided in parallel, and the area of the reflection plate 4B of the photoelectric sensor 4 is set smaller than the area of the reflection plate 3B of the photoelectric sensor 3. It is.

このため、これら反射型の光電センサ３，４の協働によって、送電コイル１２に対する受電コイル２２の位置ずれ、とりわけ、車幅方向および上下方向の位置ずれ監視を徹底することができる。   For this reason, by the cooperation of the reflective photoelectric sensors 3 and 4, it is possible to thoroughly monitor the positional deviation of the power receiving coil 22 with respect to the power transmitting coil 12, particularly the positional deviation in the vehicle width direction and the vertical direction.

なお、本発明は上述の光電センサ３，４による送電コイル１２と受電コイル２２との位置ずれ検出作用、特に、前後方向および車幅方向の位置ずれ検出作用を有効利用して、駐車スペース２に対する車両１の後退移動の誘導規制手段を兼ねることもできる。   The present invention effectively utilizes the above-described photoelectric sensor 3, 4 for detecting the positional deviation between the power transmission coil 12 and the power receiving coil 22, in particular, the positional deviation detection action in the front-rear direction and the vehicle width direction. It can also serve as a guidance restricting means for the backward movement of the vehicle 1.

１…車両
２…駐車スペース
３，４…光電センサ
３Ａ，４Ａ…投・受光器
３Ｂ，４Ｂ…反射板
１２…送電コイル（給電部）
２２…受電コイル（受電部） DESCRIPTION OF SYMBOLS 1 ... Vehicle 2 ... Parking space 3, 4 ... Photoelectric sensor 3A, 4A ... Throw and light receiver 3B, 4B ... Reflector 12 ... Power transmission coil (feed part)
22 ... Power receiving coil (power receiving unit)

Claims (2)

駐車スペースに設置した給電部と、車両に搭載した受電部との磁気的結合によって、車両に対して非接触で電力供給を行う非接触給電装置において、
前記駐車スペースの前記給電部に対して受電部とがほぼ正対する給電ポジションに駐車した車両の進入側端部と、その対向位置との相互に配置された投・受光器と反射板とを備えて、該反射板に入射した投光の反射光を測定して車両の位置ずれを検出する光電センサを備え、
前記光電センサの反射板を、前記給電部に対する受電部の車幅方向および上下方向の位置ずれ許容範囲に相当する大きさの面積に設定したことを特徴とする非接触給電装置。 In a non-contact power feeding device that supplies power to a vehicle in a non-contact manner by magnetic coupling between a power feeding unit installed in a parking space and a power receiving unit mounted on the vehicle,
An entrance side end of a vehicle parked at a power feeding position where the power receiving unit faces the power feeding unit of the parking space, and a projecting / receiving device and a reflector arranged mutually opposite to each other And a photoelectric sensor that detects the positional deviation of the vehicle by measuring the reflected light of the light incident on the reflecting plate,
The non-contact power feeding apparatus according to claim 1, wherein the photoelectric sensor reflector is set to an area having a size corresponding to an allowable positional deviation in a vehicle width direction and a vertical direction of the power receiving unit with respect to the power feeding unit. 前記光電センサを複数個備え、一方の光電センサの反射板に対して他方の反射板の面積を小さく設定したことを特徴とする請求項１に記載の非接触給電装置。   The non-contact power feeding apparatus according to claim 1, wherein a plurality of the photoelectric sensors are provided, and an area of the other reflecting plate is set smaller than a reflecting plate of the one photoelectric sensor.
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