JP2008245404A - Power transmitting system - Google Patents

Power transmitting system Download PDF

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JP2008245404A
JP2008245404A JP2007081268A JP2007081268A JP2008245404A JP 2008245404 A JP2008245404 A JP 2008245404A JP 2007081268 A JP2007081268 A JP 2007081268A JP 2007081268 A JP2007081268 A JP 2007081268A JP 2008245404 A JP2008245404 A JP 2008245404A
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power
power transmission
light
laser
power receiving
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Tomomoto Yazaki
智基 矢崎
Masashi Usami
正士 宇佐見
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KDDI Corp
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KDDI Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To transmit power in space from transmission equipment to reception equipment. <P>SOLUTION: A laser diode (12) selectively outputs a low-power dummy beam for detection of reception equipment and a high-power laser beam for transmission. The output laser beam of the laser diode (12) is emitted out of the transmission equipment (10), with its beam spread adjusted by a lens (16). Four corner cube reflectors (CCR) (44-50) arranged around a light receiving element (42) reflect the dummy beams for detection of reception equipment from the transmission equipment (10). A controller (30) adjusts the focus of the lens (16), following the reflected beam from the reception equipment (40), and controls the direction of laser emission by an optical axis deflector (32). After these adjustment, the controller (30) outputs a laser beam for transmission from the laser diode. The receiving element (42) of the reception equipment (40) receives the laser beam for transmission from the transmission equipment (10) and converts it into electric energy. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、電力伝送方法及びシステムに関し、より具体的には、光により電力を伝送する方法及びシステムに関する。   The present invention relates to a power transmission method and system, and more specifically, to a method and system for transmitting power by light.

太陽電池などの光電変換素子又は受光素子は、光エネルギーを電気エネルギーに変換する素子でもある。太陽、蛍光灯などの種々の照明装置、並びに、レーザ及び発光ダイオード等の発光素子等が、光源として利用され得る。   Photoelectric conversion elements or light receiving elements such as solar cells are also elements that convert light energy into electrical energy. Various illumination devices such as the sun and fluorescent lamps, and light emitting elements such as lasers and light emitting diodes can be used as the light source.

短時間に大電力を伝送するには、光源の出力光の輝度を上げるか、受光素子の受光面積を上げるか、その両方の何れかが必要になる。但し、高輝度の光源を利用する場合、安全性を確保する必要があるので、開放空間では使いづらい。通常は、受光光学系の形状や構造を工夫している（特許文献１）。
特開２００４−１６５５８１号公報 In order to transmit a large amount of power in a short time, it is necessary to either increase the brightness of the output light of the light source or increase the light receiving area of the light receiving element. However, when using a high-luminance light source, it is necessary to ensure safety, so it is difficult to use in an open space. Usually, the shape and structure of the light receiving optical system are devised (Patent Document 1).
Japanese Patent Laid-Open No. 2004-165581

大電力を伝送しようとすると、光源の高出力化を避けえない。レーザを利用できればよいが、空間を伝搬させると危険である。   When trying to transmit a large amount of power, it is inevitable to increase the output of the light source. A laser can be used, but it is dangerous to propagate in space.

本発明は、開放空間で高輝度光を伝搬させつつ、安全に電力を伝送できる電力伝送システムを提示することを目的とする。   An object of this invention is to show the power transmission system which can transmit electric power safely, propagating high-intensity light in open space.

本発明に係る電力伝送システムは、送電装置から受電装置に電力を空間伝送する電力伝送システムであって、当該送電装置が、広いビーム拡がり角で低パワーの受電装置検出用ダミー光と細いビームで高パワーの送電用レーザ光を選択的に出力可能なレーザ出射装置と、当該レーザ出射装置の出力レーザ光の出射方向を偏向可能な光軸偏向装置と、当該受電装置検出用ダミー光の当該受電装置からの反射光に従い、当該光軸偏向装置を制御する制御装置とを具備し、当該受電装置は、当該送電装置からの当該受電装置検出用ダミー光を入射方向に反射する反射器と、当該送電装置からの当該送電用レーザ光を光電変換する受光器とを具備することを特徴とする。   A power transmission system according to the present invention is a power transmission system that spatially transmits power from a power transmission device to a power reception device, and the power transmission device includes a wide beam divergence and low power reception device detection dummy light and a narrow beam. A laser emitting device capable of selectively outputting a high-power laser beam for power transmission, an optical axis deflecting device capable of deflecting the emitting direction of the output laser beam of the laser emitting device, and the power receiving of the dummy light for detecting the power receiving device A control device for controlling the optical axis deflecting device according to the reflected light from the device, the power receiving device reflecting the power receiving device detection dummy light from the power transmitting device in the incident direction, and And a light receiver that photoelectrically converts the laser beam for power transmission from the power transmission device.

本発明によれば、レーザ光で高効率に送電装置から受電装置に電力を空間伝送できる。   According to the present invention, power can be spatially transmitted from a power transmitting device to a power receiving device with high efficiency by laser light.

以下、図面を参照して、本発明の実施例を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の一実施例の概略構成ブロック図を示し、図２は、本実施例の光学系の斜視図を示す。   FIG. 1 shows a schematic block diagram of an embodiment of the present invention, and FIG. 2 shows a perspective view of an optical system of this embodiment.

本実施例では、送電装置１０は、給電開始を指示するユーザの所定操作に応じて、広いビーム拡がり角で低パワーのダミー光（受電装置検出用ダミー光）を出射して、受電装置４０の存在と方向を確認する。そして、受電装置４０の存在と方向を確認できると、送電装置１０は、確認できた受電装置４０の受光部に向けて、受光部の面積程度の細いビームで高パワー、例えば、数十ｍＷ〜数Ｗのレーザ光（送電用レーザ光）を出射する。詳細は後述するが、送電装置１０は、送電用レーザ光の出射方向を互いに直交する２方向、例えば、水平面内と垂直面内の２方向で偏向する手段を具備する。   In the present embodiment, the power transmission device 10 emits a low-power dummy light (power reception device detection dummy light) with a wide beam divergence angle in accordance with a predetermined operation of the user instructing the start of power supply. Check existence and direction. When the presence and direction of the power receiving device 40 can be confirmed, the power transmitting device 10 is directed toward the light receiving unit of the power receiving device 40 that has been confirmed with a high beam, for example, several tens of mW to a thin beam having an area of the light receiving unit. Several W of laser light (power transmission laser light) is emitted. Although details will be described later, the power transmission device 10 includes means for deflecting the emission direction of the power transmission laser light in two directions orthogonal to each other, for example, two directions in a horizontal plane and a vertical plane.

レーザダイオード１２は、出力パワーを制御可能であり、駆動装置１４により駆動されて、低パワーの受電装置検出用ダミー光又は高パワーの送電用レーザ光を出力する。レーザダイオード１２の出力レーザ光は、レンズ１６によりビーム拡がりを調整され、更にハーフミラー１８により反射されて、送電装置１０の外部に出射される。焦点制御装置２０は、この段階では、送電装置１０が広いビーム拡がり角の受電装置検出用ダミー光１２ａを外部に出力するように、レンズ１６のフォーカスを調整する。例えば、焦点制御装置２０は、レンズ１６をデフォーカス状態に制御する。   The laser diode 12 can control the output power, and is driven by the drive device 14 to output a low-power receiving device detection dummy light or a high-power power transmission laser beam. The output laser beam of the laser diode 12 is adjusted in beam divergence by the lens 16, further reflected by the half mirror 18, and emitted outside the power transmission device 10. At this stage, the focus control device 20 adjusts the focus of the lens 16 so that the power transmission device 10 outputs the power receiving device detection dummy light 12a having a wide beam divergence angle to the outside. For example, the focus control device 20 controls the lens 16 to a defocused state.

受電装置４０は、携帯機器、例えば、携帯電話機であり、送電装置１０からの送電用レーザ光を受光して電気エネルギーに変換する受光素子４２と、受光素子４２の周囲に配置される４つのコーナーキューブリフレクタ（ＣＣＲ）４４，４６，４８，５０を具備する。ＣＣＲ４４，４６，４８，５０は、周知のごとく、入射光をそのまま入射方向に反射する反射器であり、本実施例では、送電装置１０からの受電装置検出用ダミー光を反射するために設置される。受光素子４２と４つのＣＣＲ４４，４６，４８，５０は、ＣＣＲ４４とＣＣＲ４８を結ぶ線と、ＣＣＲ４６とＣＣＲ５０を結ぶ線が交差する位置に受光素子４２が位置するように、配置されている。後述するように、本実施例では、ＣＣＲ４４，４６，４８，５０の反射光により、受光素子４２の位置、より具体的には送電装置１０から見た方向を特定するので、ＣＣＲ４４とＣＣＲ４８を結ぶ線と、ＣＣＲ４６とＣＣＲ５０を結ぶ線は、互いに直交しているのが好ましい。   The power receiving device 40 is a mobile device, for example, a mobile phone, and receives a laser beam for power transmission from the power transmitting device 10 and converts it into electric energy, and four corners arranged around the light receiving device 42. Cubic reflectors (CCR) 44, 46, 48, 50 are provided. As is well known, the CCRs 44, 46, 48, and 50 are reflectors that reflect incident light as it is in the incident direction. In this embodiment, the CCRs 44, 46, 48, and 50 are installed to reflect power reception device detection dummy light from the power transmission device 10. The The light receiving element 42 and the four CCRs 44, 46, 48, 50 are arranged such that the light receiving element 42 is located at a position where a line connecting the CCR 44 and the CCR 48 intersects a line connecting the CCR 46 and the CCR 50. As will be described later, in the present embodiment, the position of the light receiving element 42, more specifically, the direction viewed from the power transmission device 10, is specified by the reflected light of the CCRs 44, 46, 48, 50, so the CCR 44 and the CCR 48 are connected. The line and the line connecting the CCR 46 and the CCR 50 are preferably orthogonal to each other.

送電装置１０からの受電装置検出用ダミー光がＣＣＲ４４，４６，４８，５０に入射すると、ＣＣＲ４４，４６，４８，５０は、そのダミー光を送電装置１０に向け反射する。反射されたダミー光は、その一部がハーフミラー１８を透過し、レンズ２２を介して、撮像素子２４に入射する。   When the power receiving device detection dummy light from the power transmission device 10 enters the CCR 44, 46, 48, 50, the CCR 44, 46, 48, 50 reflects the dummy light toward the power transmission device 10. A portion of the reflected dummy light passes through the half mirror 18 and enters the image sensor 24 via the lens 22.

撮像素子２４は、ＣＣＲ４４，４６，４８，５０からの反射光を含む画像信号を出力する。画像表示装置２６は、撮像素子２４から出力される画像信号を画像として表示する。また、画像処理・認識装置２８は、撮像素子２４の出力画像信号から、ＣＣＲ４４，４６，４８，５０からの反射光の位置とスポットサイズを検出し、検出結果を制御装置３０に供給する。制御装置３０は、画像処理・認識装置２８からの反射光のスポットサイズが最小になるように、即ち、受電装置４２にピントが合うように、焦点制御装置２０によりレンズ２２のフォーカスを調節させる。この調節より、撮像素子２４の撮像視野内で、ＣＣＲ４４，４６，４８，５０の位置を特定できる。オペレータ又はユーザは、画像表示装置２６の表示画像から、送電装置１０が受電装置４０に適切に送電用レーザ光を照射しているかどうかを確認できる。   The image sensor 24 outputs an image signal including reflected light from the CCRs 44, 46, 48 and 50. The image display device 26 displays the image signal output from the image sensor 24 as an image. Further, the image processing / recognition device 28 detects the position and spot size of the reflected light from the CCR 44, 46, 48, 50 from the output image signal of the image sensor 24, and supplies the detection result to the control device 30. The control device 30 causes the focus control device 20 to adjust the focus of the lens 22 so that the spot size of the reflected light from the image processing / recognition device 28 is minimized, that is, so that the power receiving device 42 is in focus. By this adjustment, the positions of the CCRs 44, 46, 48, and 50 can be specified within the imaging field of the imaging device 24. The operator or user can confirm from the display image of the image display device 26 whether or not the power transmission device 10 appropriately irradiates the power reception device 40 with the power transmission laser light.

制御装置３０は、ＣＣＲ４４，４６，４８，５０の４つの反射スポットの中心が撮像素子２４の撮像視野内で中央に位置するように、ダミー光１２ａの出射方向を変更する。この光軸調整のために、本実施例では、送電装置１０の、レーザダイオード１２，レンズ１６，ハーフミラー１８，レンズ２２及び撮像素子２４は、共通の台３４（図２）上に設置される。光軸偏向装置３２が、制御装置３０からの指示に従い、台３４を互いに直交する２方向（例えば、水平面内のパンと垂直面内のチルトの２方向）で回転させる。この動作により、光軸偏向装置３２は、送電装置１０から出射される出射レーザ光の光軸を、受電装置４０の受光素子４２に向けることができる。光軸偏向装置３２は、図２に示すように、パンのためのモータ３４ａと、チルトのためのモータ３４ｂを具備する。勿論、光学素子により、光軸を所望の方向に偏向しても良い。   The control device 30 changes the emission direction of the dummy light 12 a so that the centers of the four reflected spots of the CCRs 44, 46, 48 and 50 are located in the center in the imaging field of the imaging device 24. In order to adjust the optical axis, in this embodiment, the laser diode 12, the lens 16, the half mirror 18, the lens 22, and the image sensor 24 of the power transmission device 10 are installed on a common base 34 (FIG. 2). . The optical axis deflecting device 32 rotates the table 34 in two directions orthogonal to each other (for example, two directions of pan in a horizontal plane and tilt in a vertical plane) in accordance with an instruction from the control device 30. With this operation, the optical axis deflecting device 32 can direct the optical axis of the emitted laser light emitted from the power transmitting device 10 toward the light receiving element 42 of the power receiving device 40. As shown in FIG. 2, the optical axis deflecting device 32 includes a motor 34a for panning and a motor 34b for tilting. Of course, the optical axis may be deflected in a desired direction by an optical element.

出射レーザ光の光軸が、受電装置４０の受光素子４２に合うと、制御装置３０は、送電装置１０が狭ビーム拡がり角の送電用レーザ光を出射するように、駆動装置１４及び焦点制御装置２０を制御する。具体的には、駆動装置１４は、レーザダイオード１２から高パワーのレーザ光を出射させ、焦点制御装置２０は、送電装置１０の出力レーザ光がぎりぎり受電装置４０の受光素子４２に入射する程度に、例えば受電装置１０の受光素子４２にフォーカスするように、レンズ１６のフォーカスを制御する。これにより、高パワーの細いビームのレーザ光が受光素子４２に入射しつつ、周囲の人の目にレーザビームが入ることは無い。   When the optical axis of the emitted laser light is aligned with the light receiving element 42 of the power receiving device 40, the control device 30 causes the power transmission device 10 to emit power transmission laser light having a narrow beam divergence angle and the focus control device. 20 is controlled. Specifically, the driving device 14 emits high-power laser light from the laser diode 12, and the focus control device 20 is such that the output laser light from the power transmission device 10 is incident on the light receiving element 42 of the power receiving device 40. For example, the focus of the lens 16 is controlled so as to focus on the light receiving element 42 of the power receiving device 10. As a result, a high-power thin beam of laser light is incident on the light receiving element 42, and the laser beam does not enter the eyes of the surrounding people.

受光素子４２は、送電装置１０からの送電用レーザ光のエネルギーを電気エネルギーに変換する。充電装置５２は、受光素子４２の出力電気エネルギーにより、二次電池５４を充電する。   The light receiving element 42 converts the energy of the laser beam for power transmission from the power transmission device 10 into electric energy. The charging device 52 charges the secondary battery 54 with the output electric energy of the light receiving element 42.

制御装置３０は、送電用レーザ光を出射する状態が所定時間、継続すると、レーザダイオード１２の出力パワーを下げさせ、外部に出力されるレーザビームの拡がり角を広くする。即ち、受電装置４０への給電を停止する。勿論、送電装置１０は、レーザビームの出力を完全に停止しても良い。この場合、ユーザの所定の操作に応じて、送電装置１０は、受電装置検出用ダミー光を出力して、受電装置４０を探索し、受電装置４０を発見できたら、上述のように、送電用レーザ光を出射する。   When the state of emitting power transmission laser light continues for a predetermined time, the control device 30 reduces the output power of the laser diode 12 and widens the divergence angle of the laser beam output to the outside. That is, the power supply to the power receiving device 40 is stopped. Of course, the power transmission device 10 may completely stop the output of the laser beam. In this case, according to the user's predetermined operation, the power transmission device 10 outputs the power reception device detection dummy light, searches for the power reception device 40, and if the power reception device 40 is found, as described above. A laser beam is emitted.

受電装置検出用ダミー光の拡がりは、送電装置１０と受電装置４０との間の想定される距離において、撮像素子２４の撮影視野とほぼ同程度にしておくのが好ましい。   The spreading of the power receiving device detection dummy light is preferably approximately the same as the field of view of the imaging element 24 at the assumed distance between the power transmitting device 10 and the power receiving device 40.

ＣＣＲの位置と個数は、ＣＣＲの位置から受光素子の中心を決定できるように設定されていればよい。ＣＣＲの配置例を図３乃至図７に示す。図３は、受光素子４２の中心に１個のＣＣＲ４４ａを配置した例を示す。図４は、受光素子４２の左右にそれぞれ１個のＣＣＲ４４ｂ，４６ｂを配置した例を示す。図５は、受光素子４２の周囲に３個のＣＣＲ４４ｃ，４６ｃ，４８ｃを等角度で配置した例を示す。図６は、受光素子４２の周囲に４個のＣＣＲ４４ｄ，４６ｄ，４８ｄ，５０ｄを等角度で配置した例を示す。図７は、図６に示す構成に加えて、受光素子４２の中心にＣＣＲ５０ｅを配置した例を示す。   The CCR position and number may be set so that the center of the light receiving element can be determined from the CCR position. Examples of CCR arrangement are shown in FIGS. FIG. 3 shows an example in which one CCR 44 a is arranged at the center of the light receiving element 42. FIG. 4 shows an example in which one CCR 44b and 46b are arranged on the left and right of the light receiving element 42, respectively. FIG. 5 shows an example in which three CCRs 44 c, 46 c, and 48 c are arranged at equal angles around the light receiving element 42. FIG. 6 shows an example in which four CCRs 44d, 46d, 48d, and 50d are arranged at an equal angle around the light receiving element. FIG. 7 shows an example in which a CCR 50 e is arranged at the center of the light receiving element 42 in addition to the configuration shown in FIG. 6.

単一の受光素子４２を電力受信に使用する実施例を説明したが、複数の受光素子を併置しても良い。図８乃至図１１は、複数の受光素子を併置する構成の例を示す。図８は、２つの受光素子４２ａ，４２ａを横に並べた構成例を示す。図９は、３つの受光素子４２ｂ，４２ｂ，４２ｂを横に並べた構成例を示す。図１０は、４つの受光素子４２ｃ，４２ｃ，４２ｃ，４２ｃを２×２のマトリクス状に配置した構成例を示す。図１１は、多数の受光素子４２ｄをマトリクス状に配置した構成例を示す。   Although the embodiment in which the single light receiving element 42 is used for power reception has been described, a plurality of light receiving elements may be juxtaposed. 8 to 11 show examples of a configuration in which a plurality of light receiving elements are juxtaposed. FIG. 8 shows a configuration example in which two light receiving elements 42a and 42a are arranged side by side. FIG. 9 shows a configuration example in which three light receiving elements 42b, 42b, and 42b are arranged side by side. FIG. 10 shows a configuration example in which four light receiving elements 42c, 42c, 42c, and 42c are arranged in a 2 × 2 matrix. FIG. 11 shows a configuration example in which a large number of light receiving elements 42d are arranged in a matrix.

上述の実施例は、例えば、次のように具体化される。即ち、受電装置４０となる携帯電話機を置く台の上方に、送電装置１０を配置する。ユーザが、受電装置４０を、その受光素子４２を上向きにその台上に置くと、送電装置１０が、受電装置４０の位置を自動認識し、送電用レーザ光を受電装置４０の受光素子４２に正しく照射する。ユーザが、受電装置４０となる携帯電話機をある範囲内に適当に置くだけで良く、ユーザの使い勝手が向上する。   The above-described embodiment is embodied as follows, for example. In other words, the power transmission device 10 is disposed above a table on which a mobile phone serving as the power receiving device 40 is placed. When the user places the power receiving device 40 on the table with the light receiving element 42 facing upward, the power transmitting device 10 automatically recognizes the position of the power receiving device 40, and transmits the laser beam for power transmission to the light receiving element 42 of the power receiving device 40. Irradiate correctly. The user only needs to appropriately place the mobile phone serving as the power receiving device 40 within a certain range, and the usability of the user is improved.

レーザダイオードを光源とする実施例を説明したが、高輝度発光ダイオードを使用しても良い。   Although the embodiment using the laser diode as the light source has been described, a high-intensity light emitting diode may be used.

特定の説明用の実施例を参照して本発明を説明したが、特許請求の範囲に規定される本発明の技術的範囲を逸脱しないで、上述の実施例に種々の変更・修整を施しうることは、本発明の属する分野の技術者にとって自明であり、このような変更・修整も本発明の技術的範囲に含まれる。   Although the invention has been described with reference to specific illustrative embodiments, various modifications and alterations may be made to the above-described embodiments without departing from the scope of the invention as defined in the claims. This is obvious to an engineer in the field to which the present invention belongs, and such changes and modifications are also included in the technical scope of the present invention.

本発明の第１実施例の概略構成ブロック図である。It is a schematic block diagram of the first embodiment of the present invention. 図１に示す実施例の光学系の概略構成図である。It is a schematic block diagram of the optical system of the Example shown in FIG. ＣＣＲの配置例である。It is an example of arrangement | positioning of CCR. ＣＣＲの配置例である。It is an example of arrangement | positioning of CCR. ＣＣＲの配置例である。It is an example of arrangement | positioning of CCR. ＣＣＲの配置例である。It is an example of arrangement | positioning of CCR. ＣＣＲの配置例である。It is an example of arrangement | positioning of CCR. 複数の受光素子を使う場合の受光素子の配置例である。It is the example of arrangement | positioning of the light receiving element in the case of using a some light receiving element. 複数の受光素子を使う場合の受光素子の配置例である。It is the example of arrangement | positioning of the light receiving element in the case of using a some light receiving element. 複数の受光素子を使う場合の受光素子の配置例である。It is the example of arrangement | positioning of the light receiving element in the case of using a some light receiving element. 複数の受光素子を使う場合の受光素子の配置例である。It is the example of arrangement | positioning of the light receiving element in the case of using a some light receiving element.

符号の説明Explanation of symbols

１０：送電装置
１２：レーザダイオード
１２ａ：受電装置検出用ダミー光
１４：駆動装置
１６：レンズ
１８：ハーフミラー
２０：焦点制御装置
２２：レンズ
２４：撮像素子
２６：画像表示装置
２８：画像処理・認識装置
３０：制御装置
３２：光軸偏向装置
３４：台
３４ａ：パン用モータ
３４ｂ：チルト用モータ
４０：受電装置
４２：受光素子
４４，４６，４８，５０：コーナーキューブリフレクタ（ＣＣＲ）
５２：充電装置
５４：二次電池 10: Power transmission device 12: Laser diode 12a: Dummy light for detecting power reception device 14: Drive device 16: Lens 18: Half mirror 20: Focus control device 22: Lens 24: Image sensor 26: Image display device 28: Image processing / recognition Device 30: Control device 32: Optical axis deflection device 34: Stand 34a: Pan motor 34b: Tilt motor 40: Power receiving device 42: Light receiving elements 44, 46, 48, 50: Corner cube reflector (CCR)
52: Charging device 54: Secondary battery

Claims (4)

送電装置から受電装置に電力を空間伝送する電力伝送システムであって、
当該送電装置が、
広いビーム拡がり角で低パワーの受電装置検出用ダミー光と細いビームで高パワーの送電用レーザ光を選択的に出力可能なレーザ出射装置（１２，１６）と、
当該レーザ出射装置の出力レーザ光の出射方向を偏向可能な光軸偏向装置（３２）と、
当該受電装置検出用ダミー光の当該受電装置からの反射光に従い、当該光軸偏向装置を制御する制御装置（３０）
とを具備し、
当該受電装置は、
当該送電装置からの当該受電装置検出用ダミー光を入射方向に反射する反射器（４４，４６，４８，５０）と、
当該送電装置からの当該送電用レーザ光を光電変換する受光器（４２）
とを具備することを特徴とする電力伝送システム。 A power transmission system for spatially transmitting power from a power transmission device to a power reception device,
The power transmission device
A laser emitting device (12, 16) capable of selectively outputting a power receiving device detection dummy light with a wide beam divergence angle and a high power power transmission laser light with a narrow beam;
An optical axis deflecting device (32) capable of deflecting the emitting direction of the output laser beam of the laser emitting device;
A control device (30) for controlling the optical axis deflecting device according to the reflected light from the power receiving device of the power receiving device detection dummy light
And
The power receiving device is
A reflector (44, 46, 48, 50) for reflecting the power receiving device detection dummy light from the power transmitting device in the incident direction;
Photoreceiver (42) that photoelectrically converts the laser beam for power transmission from the power transmission device
An electric power transmission system comprising: 当該レーザ出射装置が、出力パワーを選択可能なレーザ発生装置（１２）と、当該レーザ発生装置の出力レーザ光のビーム拡がりを調節するビーム調節装置（１６，２０）とを具備することを特徴とする電力伝送システム。   The laser emitting device includes a laser generator (12) capable of selecting an output power and a beam adjusting device (16, 20) for adjusting the beam spread of the output laser light of the laser generator. Power transmission system. 当該受電装置は更に、二次電池（５４）と、当該受光器（４２）の出力電気信号に従い、当該二次電池を充電する受電装置５２とを具備することを特徴とする請求項１又は２に記載の電力伝送システム。   The said power receiving apparatus is further equipped with the secondary battery (54) and the power receiving apparatus 52 which charges the said secondary battery according to the output electric signal of the said light receiver (42), The characterized by the above-mentioned. The power transmission system described in 1. 当該反射器が、１以上のコーナーキューブリフレクタ（４４，４６，４８，５０）からなることを特徴とする請求項１乃至３の何れか１項に記載の電力伝送システム。
The power transmission system according to any one of claims 1 to 3, wherein the reflector includes one or more corner cube reflectors (44, 46, 48, 50).
JP2007081268A 2007-03-27 2007-03-27 Power transmitting system Pending JP2008245404A (en)

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