JP2008224536A - Receiving device of visible light communication, and visible light navigation system - Google Patents

Receiving device of visible light communication, and visible light navigation system Download PDF

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JP2008224536A
JP2008224536A JP2007065520A JP2007065520A JP2008224536A JP 2008224536 A JP2008224536 A JP 2008224536A JP 2007065520 A JP2007065520 A JP 2007065520A JP 2007065520 A JP2007065520 A JP 2007065520A JP 2008224536 A JP2008224536 A JP 2008224536A
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visible light
navigation system
illumination light
receiving device
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Hiroyuki Unoki
宏幸 卯木
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Toshiba Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a receiving device of visible light communication and a visible light navigation system capable of performing navigation by using visible light. <P>SOLUTION: A data transmission/power source part 10 modulates data to be transmitted, and transmits modulated data in the loaded state on a carrier wave which is irradiation light. A data receiving device 12 demodulates received irradiation light, and displays route guide information on map data based on demodulated data. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、可視光を利用した可視光通信の受信装置及び可視光ナビゲーションシステムに関する。   The present invention relates to a receiver for visible light communication using visible light and a visible light navigation system.

一般的に、可視光を用いた通信技術においては、入力されたデータに基づいて変調された光からなる信号光を発信することが可能なエレクトロルミネッセンス素子を用いた発光装置が開示されている（特許文献１参照）。
特開２００３-１１５８０３号公報 In general, in a communication technique using visible light, a light emitting device using an electroluminescence element capable of transmitting signal light composed of light modulated based on input data is disclosed ( Patent Document 1).
JP 2003-115803 A

しかし、特許文献１の技術では、受信装置が移動した場合について考慮がされていない。   However, in the technique of Patent Document 1, no consideration is given to the case where the receiving apparatus moves.

本発明は上述の事情を考慮してなされたものであり、受信装置が移動した場合でも可視光を用いてナビゲーションを行うことができる可視光通信の受信装置及び可視光ナビゲーションシステムを提供することを目的とする。   The present invention has been made in view of the above circumstances, and provides a visible light communication receiver and visible light navigation system capable of performing navigation using visible light even when the receiver moves. Objective.

上記目的を達成するために、本発明の一態様によれば、データ送信装置およびデータ受信装置とから構成される可視光ナビゲーションシステムであって、前記データ送信装置は、送信するデータを変調する変調手段と、前記変調手段によって変調されたデータを照明光である搬送波に乗せて前記データ受信装置に送信する送信手段とを備え、前記データ受信装置は、地図データを記憶する地図データ記憶手段と、前記送信手段によって受信された照明光を検出する検出手段と、前記検出手段によって検出された照明光を復調する復調手段と、前記復調手段によって復調されたデータに基づいて、前記地図データ記憶手段から読み出した地図データに道案内情報を表示する表示手段と、を具備することを特徴とする可視光ナビゲーションシステムが提供される。   To achieve the above object, according to one aspect of the present invention, there is provided a visible light navigation system including a data transmission device and a data reception device, wherein the data transmission device modulates data to be transmitted. Means, and transmission means for transmitting the data modulated by the modulation means on a carrier wave that is illumination light to the data receiving apparatus, the data receiving apparatus comprising: map data storage means for storing map data; Based on the data demodulated by the demodulating means, the detecting means for detecting the illuminating light received by the transmitting means, the demodulating means for demodulating the illuminating light detected by the detecting means, from the map data storage means A visible light navigation system comprising: display means for displaying route guidance information on the read map data There is provided.

本発明によれば、可視光を用いてナビゲーションを行うことができる。   According to the present invention, navigation can be performed using visible light.

以下、図面を参照して本発明の実施形態を説明する。
まず、本発明の実施形態に係る可視光ナビゲーションシステムは、ＬＥＤ照明等の照明装置からの照明光を搬送波としてデータを送信するために、副搬送波を用いてデジタル、あるいはアナログ変調されたデータが照明光を搬送波として出力される（変調されたデータを照明光である搬送波に乗せて出力される）。データが乗った照明光は人間の目では見えることは無く、他の通常の照明と見掛け上は全く変わらない状態でデータが送信される。受信側装置には小型のカメラや光センサーを用いて照明光を受光する。また、照明光により搬送された変調データを抽出し、そのデータを復調することにより、送信されてきたデータ（位置情報、目的地情報）を得ることができる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, in the visible light navigation system according to the embodiment of the present invention, in order to transmit data using illumination light from an illumination device such as LED illumination as a carrier wave, data that is digitally or analog-modulated using a subcarrier is illuminated. Light is output as a carrier wave (modulated data is output on a carrier wave that is illumination light). The illumination light carrying the data is not visible to the human eye, and the data is transmitted in a state that does not change in appearance from other ordinary illuminations. The receiving device receives illumination light using a small camera or optical sensor. Further, by transmitting the modulated data carried by the illumination light and demodulating the data, the transmitted data (position information, destination information) can be obtained.

図１に示すように、本発明の実施形態に係る可視光ナビゲーションシステムは、可視光通信の送信装置および可視光通信の受信装置１２から構成される。送信装置は、データ送信／電源部１０およびＬＥＤ（Light Emitting Diode）照明部１１を備える。ＬＥＤ照明部１１からは照明光が照射される。受信装置１２は、表示部１３、受光部１４、マイク１５、スピーカー部１６等を備える。なお、本実施形態では、照明装置としてＬＥＤを用いた例を説明するが、照明装置はＬＥＤに限定されるものではなく、可視光であれば問わない。   As shown in FIG. 1, the visible light navigation system according to the embodiment of the present invention includes a visible light communication transmitting device and a visible light communication receiving device 12. The transmission device includes a data transmission / power supply unit 10 and an LED (Light Emitting Diode) illumination unit 11. Illumination light is emitted from the LED illumination unit 11. The receiving device 12 includes a display unit 13, a light receiving unit 14, a microphone 15, a speaker unit 16, and the like. In addition, although this embodiment demonstrates the example which used LED as an illuminating device, an illuminating device is not limited to LED, What is visible light is not ask | required.

図２は、本発明の実施形態に係る可視光ナビゲーションシステムを示したブロック図である。   FIG. 2 is a block diagram showing a visible light navigation system according to an embodiment of the present invention.

当該ブロック図を用いて、本発明の実施形態に係る可視光ナビゲーションシステムについて詳しく説明する。データ送信／電源部１０は、データ変調部２０、送信データ作成部２１、ＬＥＤ駆動部２２、電源部２３、ＬＥＤ照明部１１を備えている。データ送信／電源部１０は、ＬＥＤ照明の駆動電源が生成されるとともに、位置情報や目的地情報に基づいて送信データを作成し、これらのデータを送信タイミングで副搬送波を用いてデジタル、あるいはアナログ変調した後、ＬＥＤ駆動部で変調データとともにＬＥＤ照明に対して出力される。電源部２３は、データ送信／電源部１０に電源を供給する。送信データ作成部２１は、予め設定されている位置情報や目的地情報から送信データを作成する。データ変調部２０は、作成されたデータを変調し、ＬＥＤ駆動部２２に送信する。また、データを送信のタイミングで副搬送波を用いてデジタル、あるいはアナログ変調する。ＬＥＤ駆動部２２は、変調されたデータに基づいてＬＥＤ照明部１１から照明光を出力する制御を行う。   The visible light navigation system according to the embodiment of the present invention will be described in detail using the block diagram. The data transmission / power supply unit 10 includes a data modulation unit 20, a transmission data creation unit 21, an LED drive unit 22, a power supply unit 23, and an LED illumination unit 11. The data transmission / power supply unit 10 generates drive power for the LED illumination, creates transmission data based on position information and destination information, and uses these sub-carriers for digital or analog transmission of these data at transmission timing. After the modulation, the LED driving unit outputs the modulated data together with the LED illumination. The power supply unit 23 supplies power to the data transmission / power supply unit 10. The transmission data creation unit 21 creates transmission data from preset position information and destination information. The data modulator 20 modulates the created data and transmits it to the LED driver 22. In addition, data is digitally or analog-modulated using subcarriers at the transmission timing. The LED drive unit 22 performs control to output illumination light from the LED illumination unit 11 based on the modulated data.

受信装置１２は、表示部１３、受光部１４、波形抽出部３１、信号復調部３２および地図データ記憶部３４等を備えている。受光部１４は、照明光を受光する光センサまたはカメラである。波形抽出部３１は、受光部１４により受光した照明光（可視光）を検出する。信号復調部３２は、波形抽出部３１により検出された照明光から変調されたデータを分離し、復調する。復調されたデータは、データ送信／電源部１０が位置する場所の位置情報または、ユーザが向かうべき目的地情報（道案内情報）である。表示部１４は、これらの情報と進むべき方向の情報（道案内情報）を地図データ記憶部３４から読み出した地図に合わせて表示する。例えば、図４は、病院内でナビゲーションを行う例を示した模式図である。レントゲン室にいるユーザ１００は、例えば、位置情報として「レントゲン室」、目的地情報として「内科」というデータをレントゲン室のデータ送信／電源部１０から受信する。   The receiving device 12 includes a display unit 13, a light receiving unit 14, a waveform extraction unit 31, a signal demodulation unit 32, a map data storage unit 34, and the like. The light receiving unit 14 is an optical sensor or a camera that receives illumination light. The waveform extraction unit 31 detects illumination light (visible light) received by the light receiving unit 14. The signal demodulator 32 separates the modulated data from the illumination light detected by the waveform extractor 31 and demodulates it. The demodulated data is position information of a place where the data transmission / power supply unit 10 is located, or destination information (direction guidance information) to which the user should go. The display unit 14 displays the information and the information on the direction to travel (road guidance information) in accordance with the map read from the map data storage unit 34. For example, FIG. 4 is a schematic diagram illustrating an example in which navigation is performed in a hospital. The user 100 in the X-ray room receives, for example, data “X-ray room” as position information and “Internal Medicine” as destination information from the data transmission / power supply unit 10 of the X-ray room.

次に、図３のフローチャートおよび図４を参照して、本発明の実施形態に係る可視光ナビゲーションシステムおよび受信装置の制御方法について説明する。本実施形態では、ユーザ（患者）１００が、病院内でレントゲン室から内科へ行く場合に、ユーザ１００に病院側から配布された携帯端末（データ受信装置１２）を用いてナビゲーションを行う場合について説明する。   Next, with reference to the flowchart of FIG. 3 and FIG. 4, the visible light navigation system and the control method of the receiving device according to the embodiment of the present invention will be described. In this embodiment, when the user (patient) 100 goes from the X-ray room to the internal medicine in the hospital, navigation is performed using the mobile terminal (data reception device 12) distributed to the user 100 from the hospital side. To do.

データ送信／電源部１０の送信データ作成部２１は、データ送信／電源部１０に記憶された位置情報および医師等から入力された目的地情報に基づいて送信データを作成する（ステップＳ１０１）。例えば、位置情報は「レントゲン室」、目的地情報は「内科」とする。   The transmission data creation unit 21 of the data transmission / power supply unit 10 creates transmission data based on the location information stored in the data transmission / power supply unit 10 and the destination information input from a doctor or the like (step S101). For example, the position information is “X-ray room” and the destination information is “Internal Medicine”.

データ変調部２０は、送信データが副搬送波を用いてデジタル、あるいはアナログ変調された後、ＬＥＤ駆動部２２で変調データとともにＬＥＤ照明部１１に対して照明光が出力される（ステップＳ１０１）。なお、出力するデータ送信／電源部１０は、「レントゲン室」のデータ送信／電源部１０である。   After the transmission data is digitally or analog-modulated using the subcarrier, the data modulation unit 20 outputs illumination light to the LED illumination unit 11 together with the modulation data at the LED drive unit 22 (step S101). The data transmission / power supply unit 10 to be output is the data transmission / power supply unit 10 of the “X-ray room”.

データ受信装置１２である携帯端末の表示部１３には、病院内の地図が図４に示すように表示される。また、ユーザ１００の現在地および目的地１１０が例えば星印で表示されるものとし、通路には、データ送信／電源部１０が複数配置されている。   A map of the hospital is displayed on the display unit 13 of the portable terminal which is the data receiving device 12 as shown in FIG. Further, it is assumed that the current location and the destination 110 of the user 100 are displayed by, for example, stars, and a plurality of data transmission / power supply units 10 are arranged in the passage.

ユーザ１００は、「レントゲン室」を出ると、これらのデータ送信／電源部１０から携帯端末により位置情報を定期的に受信する。受信した位置情報により、携帯端末の表示部１３に表示された地図上のユーザ１００位置は更新され、目的地１１０に向けて例えば矢印１２０が表示される。   When the user 100 leaves the “X-ray room”, the mobile terminal periodically receives position information from the data transmission / power supply unit 10. Based on the received position information, the position of the user 100 on the map displayed on the display unit 13 of the mobile terminal is updated, and for example, an arrow 120 is displayed toward the destination 110.

このようにして、ユーザ１００は、地図上に表示された矢印１２０に従って移動することにより、目的地１１０までナビゲーションが行われる（ステップＳ１０２）。なお、携帯端末に備えられたマイク１５から音声で目的地を入力することにより、音声ナビゲーションを行うことができる。また、タッチパネルや各種のボタンの入力によって目的地情報が入力されるようにしてもよい。また、ナビゲーションは、地図上に表示された矢印１２０に加え、スピーカー部１６から発音される音声ガイダンスによっても行うことができる。   Thus, the user 100 navigates to the destination 110 by moving according to the arrow 120 displayed on the map (step S102). Note that voice navigation can be performed by inputting a destination by voice from the microphone 15 provided in the portable terminal. Further, the destination information may be input by inputting a touch panel or various buttons. Navigation can also be performed by voice guidance generated by the speaker unit 16 in addition to the arrow 120 displayed on the map.

以上、本実施形態によれば、可視光の送信装置が複数配置されている場所において、可視光を用いてナビゲーションを行うことができる。また、可視光を用いるため、電波を用いることができない病院等でもデータ通信を行いナビゲーションを利用することができる。   As described above, according to the present embodiment, navigation can be performed using visible light at a place where a plurality of visible light transmitters are arranged. Further, since visible light is used, navigation can be performed by performing data communication even in hospitals where radio waves cannot be used.

なお、本発明は、上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合せにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。更に、異なる実施形態に亘る構成要素を適宜組み合せてもよい。   Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

本発明の一実施形態に係る可視光ナビゲーションシステムを示した模式図。The schematic diagram which showed the visible light navigation system which concerns on one Embodiment of this invention. 本発明の実施形態に係る可視光ナビゲーションシステムを示したブロック図。The block diagram which showed the visible light navigation system which concerns on embodiment of this invention. 本発明の実施形態に係る受信装置および可視光ナビゲーションシステムの制御を説明したフローチャート。The flowchart explaining control of the receiver which concerns on embodiment of this invention, and a visible light navigation system. 本発明の実施形態に係るナビゲーションで用いられる地図表示を示した模式図。The schematic diagram which showed the map display used by the navigation which concerns on embodiment of this invention.

符号の説明Explanation of symbols

１０…データ送信／電源部、１１…ＬＥＤ照明部、１２…データ受信装置、１３…表示部、１４…受光部、２０…データ変調部、２１…送信データ作成部、２２…ＬＥＤ駆動部、２３…電源部、３１…波形抽出部、３２…信号復調部、情報処理部３３，地図データ記憶部３４   DESCRIPTION OF SYMBOLS 10 ... Data transmission / power supply part, 11 ... LED illumination part, 12 ... Data receiver, 13 ... Display part, 14 ... Light-receiving part, 20 ... Data modulation part, 21 ... Transmission data creation part, 22 ... LED drive part, 23 ... Power supply unit, 31 ... Waveform extraction unit, 32 ... Signal demodulation unit, information processing unit 33, map data storage unit 34

Claims (10)

データ送信装置およびデータ受信装置とから構成される可視光ナビゲーションシステムであって、
前記データ送信装置は、
送信するデータを変調する変調手段と、
前記変調手段によって変調されたデータを照明光である搬送波に乗せて前記データ受信装置に送信する送信手段とを備え、
前記データ受信装置は、
地図データを記憶する地図データ記憶手段と、
前記送信手段によって送信された照明光を検出する検出手段と、
前記検出手段によって検出された照明光を復調する復調手段と、
前記復調手段によって復調されたデータに基づいて、前記地図データ記憶手段から読み出した地図データに道案内情報を表示する表示手段と、
を具備することを特徴とする可視光ナビゲーションシステム。 A visible light navigation system comprising a data transmission device and a data reception device,
The data transmission device includes:
Modulation means for modulating data to be transmitted;
Transmitting means for transmitting the data modulated by the modulating means to the data receiving device on a carrier wave that is illumination light;
The data receiving device is:
Map data storage means for storing map data;
Detecting means for detecting the illumination light transmitted by the transmitting means;
Demodulation means for demodulating the illumination light detected by the detection means;
Display means for displaying route guidance information on the map data read from the map data storage means based on the data demodulated by the demodulation means;
A visible light navigation system comprising: 請求項１に記載の可視光ナビゲーションシステムにおいて、
前記照明光は、ＬＥＤから出力されることを特徴とする可視光ナビゲーションシステム。 The visible light navigation system according to claim 1.
The visible light navigation system, wherein the illumination light is output from an LED. 請求項１に記載の可視光ナビゲーションシステムにおいて、
前記復調手段は、前記照明光検出手段によって検出された照明光から前記データを分離し、分離されたデータを復調することを特徴とする可視光ナビゲーションシステム。 The visible light navigation system according to claim 1.
The visible light navigation system, wherein the demodulating means separates the data from the illumination light detected by the illumination light detecting means, and demodulates the separated data. 請求項１に記載の可視光ナビゲーションシステムにおいて、
前記データは、前記データ送信装置が設置されている位置を示す位置情報、または行き先の目的地を示す目的地情報であることを特徴とする可視光ナビゲーションシステム。 The visible light navigation system according to claim 1.
The visible light navigation system, wherein the data is position information indicating a position where the data transmission device is installed or destination information indicating a destination of a destination. 請求項１に記載の可視光ナビゲーションシステムにおいて、
前記データ受信装置は、携帯端末であることを特徴とする可視光ナビゲーションシステム。 The visible light navigation system according to claim 1.
The visible light navigation system, wherein the data receiving device is a portable terminal. 地図データを記憶する地図データ記憶手段と、
受信された照明光を検出する検出手段と、
前記検出手段によって検出された照明光を復調する復調手段と、
前記復調手段によって復調されたデータに基づいて、前記地図データ記憶手段から読み出した地図データに道案内情報を表示する表示手段と、
を具備することを特徴とする可視光通信の受信装置。 Map data storage means for storing map data;
Detecting means for detecting the received illumination light;
Demodulation means for demodulating the illumination light detected by the detection means;
Display means for displaying route guidance information on the map data read from the map data storage means based on the data demodulated by the demodulation means;
A receiving device for visible light communication, comprising: 請求項６に記載の可視光通信の受信装置において、
前記照明光は、ＬＥＤから出力されることを特徴とする可視光通信の受信装置。 The receiver for visible light communication according to claim 6,
The receiving device for visible light communication, wherein the illumination light is output from an LED. 請求項６に記載の可視光通信の受信装置において、
前記復調手段は、前記照明光検出手段によって検出された照明光から前記データを分離し、分離されたデータを復調することを特徴とする可視光通信の受信装置。 The receiver for visible light communication according to claim 6,
The receiving device for visible light communication, wherein the demodulating means separates the data from the illumination light detected by the illumination light detecting means and demodulates the separated data. 請求項６に記載の可視光通信の受信装置において、
前記復調手段は、前記照明光検出手段によって検出された照明光から前記データを分離し、分離されたデータを復調することを特徴とする可視光通信の受信装置。 The receiver for visible light communication according to claim 6,
The receiving device for visible light communication, wherein the demodulating means separates the data from the illumination light detected by the illumination light detecting means and demodulates the separated data. 請求項６に記載の可視光通信の受信装置において、
前記データ受信装置は、携帯端末であることを特徴とする可視光通信の受信装置。 The receiver for visible light communication according to claim 6,
The data receiver is a portable terminal, and is a visible light communication receiver.
JP2007065520A 2007-03-14 2007-03-14 Receiving device of visible light communication, and visible light navigation system Pending JP2008224536A (en)

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