【発明の詳細な説明】〔産業上の利用分野〕この発明は、測位手段としてG P S (Globa
lPositioning 5ystes+)受信機を
用い、現在位置や走行軌跡などの測位結果に基づく情報
を表示部に表示する車両用ナビゲーション装置に関する
ものである。[Detailed Description of the Invention] [Industrial Application Field] This invention uses GPS (Globa
The present invention relates to a vehicle navigation device that displays information based on positioning results, such as a current position and a driving trajectory, on a display unit using a 1Positioning 5ystes+) receiver.
従来、この種の車両用ナビゲーシラン装置においては、
GPS受信機による測位結果に基づいた現在位置や走行
軌跡などの情報を、表示部の表示画面上に一表示した地
図上に所定のマーカー、所定の輝線を用いる表示形態で
表示している。Conventionally, in this type of vehicle navigation system,
Information such as the current position and travel trajectory based on the positioning results of the GPS receiver is displayed on a map displayed on the display screen of the display unit in a display format using predetermined markers and predetermined bright lines.
ところで、GPS受信機による測位が不可能になる場合
として、−船釣に、電波の受信可能な人工衛星数の不足
による場合と、電波の受信可能な人工衛星数は足りてい
るが、人工衛星からの電波を受信することのできないビ
ルの谷間やトンネルなどを通過する場合が考えられる。By the way, there are two cases in which positioning using a GPS receiver becomes impossible: - When fishing on a boat, there is a shortage of satellites that can receive radio waves, and when there are enough satellites that can receive radio waves, There may be cases where the vehicle passes through a valley between buildings or through a tunnel, where radio waves cannot be received.
このような場合、それまで行なっていた現在位置や走行
軌跡などの情報の表示を中断し、表示部の表示画面上に
測位できた最終現在位置もしくは最終現在位置に至る走
行軌跡などの最終情報を表示部に表示し続けることにな
る。In such a case, the display of information such as the current position and driving trajectory that was being performed up to that point will be interrupted, and the final information such as the final current position that could be determined or the driving path leading to the final current position will be displayed on the display screen of the display unit. It will continue to be displayed on the display.
従来の車両用ナビゲーション装置において、GPS受信
機による測位が不可能になった場合、表示部の表示画面
上に表示されている最終現在位置が移動せずに停止した
ままになったり、走行軌跡が変化しなくなる。In conventional vehicle navigation devices, if positioning by the GPS receiver becomes impossible, the final current position displayed on the display screen of the display unit may remain stationary without moving, or the driving trajectory may change. It stops changing.
そして、このような状態が、電波の受信可能な人工衛星
数の不足によるものなのか、電波の受信可能な人工衛星
数は足りているが、人工衛星からの電波が遮断されたも
のなのかを判断していないので、電波の受信可能な人工
衛星数の不足であるにもかかわらず、いつまでも最終現
在位置もしくは最終現在位置に至る走行軌跡を表示する
ことによって利用者(運転者)に走行位置を見誤らせた
り、−時的な電波の遮断にもかかわらず、電波の受信可
能な人工衛星数の不足であると利用者が誤認し、車両用
ナビゲーション装置の電源をオフしてしまうなどの不都
合があった。We will then investigate whether this situation is due to a lack of the number of satellites that can receive radio waves, or whether there is a sufficient number of satellites that can receive radio waves but the radio waves from the satellites have been cut off. Even though the number of satellites that can receive radio waves is insufficient, the current position or the driving trajectory leading to the final current position can be displayed forever to the user (driver). Inconveniences such as misinterpretation or - Despite the temporary interruption of radio waves, users may mistakenly believe that there is a shortage of satellites that can receive radio waves and turn off the power to their vehicle navigation equipment. was there.
この発明は、上記したような不都合を解消するためにな
されたもので、電波の受信可能な人工衛星数の不足によ
って測位が不可能なのか、電波の受信可能な人工衛星数
は足りているが、人工衛星からの電波が遮断されたこと
によって測位が不可能なのかを的確に報知することので
きる車両用ナビゲーション装置を提供するものである。This invention was made to solve the above-mentioned inconvenience.Possibly positioning is not possible due to a shortage of satellites that can receive radio waves, or even though there are enough satellites that can receive radio waves. To provide a vehicle navigation device that can accurately notify whether positioning is impossible due to interruption of radio waves from an artificial satellite.
この発明にかかる車両用ナビゲーション装置は、電波の
受信可能な人工衛星数の不足によってOPS受信機によ
る測位が不可能な場合、人工衛星からのアルマナックデ
ータなどに基づいて再度測位が可能になる時刻もしくは
その時刻までの待ち時間を表示部に表示するものである
。In the vehicle navigation device according to the present invention, when positioning by the OPS receiver is impossible due to a lack of the number of satellites that can receive radio waves, the vehicle navigation device determines the time when positioning becomes possible again based on almanac data from the satellite, etc. The waiting time until that time is displayed on the display section.
また、他の発明にかかる車両用ナビゲーション装置は、
先の発明に加え、電波の受信可能な人工衛星数は足りて
いるが、人工衛星からの電波が遮断されたことによって
GPS受信機による測位が不可能な場合、測位できた測
位結果に基づく最終情報を、表示形態を変化させて表示
部に表示するものである。Further, a vehicle navigation device according to another invention includes:
In addition to the above invention, if there is a sufficient number of satellites that can receive radio waves, but positioning by a GPS receiver is not possible due to the radio waves from the satellites being cut off, the final positioning result based on the positioning results Information is displayed on a display unit by changing the display form.
この発明における車両用ナビゲーション装置は、電波の
受信可能な人工衛星数の不足によってGPS受信機によ
る測位が不可能になると、人工衛星からのアルマナック
データなどに基づいて再度測位が可能になる時刻もしく
はその時刻までの待ち時間を表示部に表示する。In the vehicle navigation device of the present invention, when positioning by a GPS receiver becomes impossible due to a shortage of the number of satellites that can receive radio waves, the vehicle navigation device determines the time when positioning will be possible again based on almanac data from the satellite, etc. The waiting time until the time is displayed on the display.
さらに、電波の受信可能な人工衛星数は足りているが、
人工衛星からの電波が遮断されたことによってGPS受
信機による測位が不可能になると、測位できた測位結果
に基づく最終情報を、表示形態を変化させて表示部に表
示する。Furthermore, although there are enough satellites that can receive radio waves,
When positioning by the GPS receiver becomes impossible due to radio waves from the artificial satellite being cut off, the final information based on the positioning results is displayed on the display unit by changing the display format.
したがって、利用者は表示部の時刻もしくは待ち時間、
または表示形態を変化させた最終情報を見ることにより
、電波の受信可能な人工衛星数の不足によって測位が不
可能なのか、電波の受信可能な人工衛星数は足りている
が、人工衛星からの電波が遮断されたことによって測位
が不可能なのかを的確に把握することができる。Therefore, users can check the time or waiting time on the display.
Or, by looking at the final information with a changed display format, you can determine whether positioning is not possible due to a lack of satellites that can receive radio waves, or whether there is a sufficient number of satellites that can receive radio waves, but the number of satellites that can receive radio waves is insufficient. It is possible to accurately determine whether positioning is impossible due to radio waves being blocked.
以下、この発明の実施例を図に基づいて説明する。Embodiments of the present invention will be described below with reference to the drawings.
第1図はこの発明の一実施例による車両用ナビゲーショ
ン装置の構成を示すブロック図であり、■はMPLJを
示し、ROM2に格納されているシステムプログラムを
実行することにより、RAM3をワークエリアなどとし
て必要な各種の機能を実現するものである。FIG. 1 is a block diagram showing the configuration of a vehicle navigation device according to an embodiment of the present invention, where ■ indicates MPLJ, and by executing a system program stored in ROM 2, RAM 3 is used as a work area etc. It realizes various necessary functions.
そして、MPUI〜RAM3で構成されるマイクロコン
ピュータにより、車両用ナビゲーション装置は制御され
る。The vehicle navigation device is controlled by a microcomputer composed of MPUI to RAM3.
4は必要な入力を与えるためのテンキー、ファンクショ
ンキー、タッチパネルなどを備えた操作部、5はCRT
7の表示画面上に表示する1画面分の画像データを記憶
するビデオRAMを示し、このビデオRAM5が記憶し
た画面データは、MPUIの作用によってCRTコント
ローラ6に送出され、CRTコントローラ6に接続され
たCRT7の表示画面上に地図が表示される。4 is an operation unit equipped with a numeric keypad, function keys, touch panel, etc. for giving necessary input, and 5 is a CRT.
The screen data stored in the video RAM 5 is sent to the CRT controller 6 by the action of the MPUI, and is connected to the CRT controller 6. A map is displayed on the display screen of the CRT 7.
8はGPS受信機を示し、周知のように、複数の人工衛
星からの電波を受信して測位を行なうものであり、現在
位置を測位するためには少なくとも3個以上の人工衛星
からの電波を受信する必要がある。8 indicates a GPS receiver, which, as is well known, performs positioning by receiving radio waves from multiple artificial satellites, and in order to determine the current position, it must receive radio waves from at least three or more artificial satellites. need to receive it.
なお、このGPS受信機8で測位された現在位置のデー
タは、時系列的に記憶保持され、この記憶保持したデー
タに基づいて走行軌跡をCRT7の表示画面上に表示し
た地図上に表示することができる。Note that the data of the current position determined by the GPS receiver 8 is stored and retained in chronological order, and the travel trajectory is displayed on a map displayed on the display screen of the CRT 7 based on this stored data. I can do it.
9はCRT7の表示画面上に表示する地図データを記憶
しているCD−ROMを示し、MPUIの作用によって
適宜に編集した地図データをビデオRAM5に送出する
。Reference numeral 9 indicates a CD-ROM that stores map data to be displayed on the display screen of the CRT 7, and sends the map data appropriately edited by the action of the MPUI to the video RAM 5.
10はシステムハスを示し、MPUI−CRTコントロ
ーラ6、GPS受信機8およびCD−ROM9が接続さ
れている。Reference numeral 10 indicates a system unit to which an MPUI-CRT controller 6, a GPS receiver 8, and a CD-ROM 9 are connected.
第2図は動作を説明するためのフローチャートであり、
ST 1−5T 5は各ステップを示す。FIG. 2 is a flowchart for explaining the operation,
ST1-5T5 indicates each step.
第3図および第4図は表示形態の一例を示す説明図であ
り、7aはCRT7の表示画面、9aは表示画面7a上
に表示された地図を示す。FIGS. 3 and 4 are explanatory diagrams showing an example of the display format, where 7a shows the display screen of the CRT 7, and 9a shows the map displayed on the display screen 7a.
11は連続点灯する輝点て表示される測位中の現在位置
、12は測位した現在位置11に基づく走行軌跡、13
は再度測位が可能になる測位再開時刻、14は点滅点で
表示される測位できた最終現在位置を示す。11 is the current position during positioning, which is displayed as a bright spot that lights up continuously; 12 is the driving trajectory based on the measured current position 11; 13
14 indicates the positioning restart time when positioning becomes possible again, and 14 indicates the final current position that was successfully positioned, which is displayed as a blinking point.
次に、動作について説明する。Next, the operation will be explained.
まず、CRT7の表示画面7a上に地図9aを表示した
状態で、この地図9a上に現在位置および走行軌跡を表
示する処理を開始すると、測位が可能かを判定しくステ
ップ5TI)、測位が可能であれば、現在位置11およ
び走行軌跡12を所定の表示形態で、第3図に示すよう
に、表示する(ステップ5T2)。First, with the map 9a displayed on the display screen 7a of the CRT 7, when the process of displaying the current position and travel trajectory on the map 9a is started, it is determined whether positioning is possible (Step 5TI), and it is determined that positioning is possible. If so, the current position 11 and travel trajectory 12 are displayed in a predetermined display format as shown in FIG. 3 (step 5T2).
そして、ステップSTIの判定で測位が不可能であれば
、電波の受信可能な人工衛星数が3つ未満であるかを判
定しくステップ5T3)、電波の受信可能な人工衛星数
が3つ未満であれば、電波の受信可能な人工衛星数の不
足によって測位が不可能なため、人工衛星からのアマル
ナツクデータに基づいて再度測位が可能になる時刻(測
位再開時刻13)を算出し、第4図に示すように、表示
画面7aの右上隅に測位再開時刻13を表示する(ステ
ップ5T4)。If positioning is not possible in step STI, it is determined whether the number of satellites that can receive radio waves is less than three (step 5T3). If there is, positioning is impossible due to a lack of the number of satellites that can receive radio waves, so the time when positioning will be possible again (positioning restart time 13) is calculated based on the Amarnatsk data from the satellite, and the fourth As shown in the figure, the positioning restart time 13 is displayed in the upper right corner of the display screen 7a (step 5T4).
また、ステップST3の判定で電波の受信可能な人工衛
星数が3つ以上であれば、人工衛星からの電波が遮断さ
れたことによって測位が不可能なため、第4図に示すよ
うに、最終現在位置14を表示する(ステップ5T5)
。Furthermore, if the number of satellites that can receive radio waves is three or more as determined in step ST3, positioning is impossible due to the radio waves from the satellites being cut off, so the final Display current position 14 (step 5T5)
.
なお、ステップST2 、 ST4 、 ST5の後は
ステップSTIに進む。Note that after steps ST2, ST4, and ST5, the process proceeds to step STI.
したがって、この実施例によれば、GPS受信機8によ
る測位が不可能な状態になった場合、電波の受信可能な
人工衛星数の不足によって測位が不可能なのか、電波の
受信可能な人工衛星数は足りているが、人工衛星からの
電波が遮断されたことによって測位が不可能なのかを、
CRT7の表示画面7a上に測位再開時刻13または最
終現在位置14を表示して報知するので、利用者は表示
画面7a上の測位再開時刻13または最終現在位置14
を見ることにより、測位の不可能がいずれによるものな
のかを的確に把握することができる。Therefore, according to this embodiment, when positioning by the GPS receiver 8 becomes impossible, whether positioning is not possible due to a lack of the number of satellites that can receive radio waves, or if there are no satellites that can receive radio waves Although there are enough satellites, I am wondering if positioning is not possible due to the radio waves from the satellites being cut off.
Since the positioning restart time 13 or the final current position 14 is displayed and notified on the display screen 7a of the CRT 7, the user can check the positioning restart time 13 or the final current position 14 on the display screen 7a.
By looking at the above, it is possible to accurately determine which reason is causing the inability to position.
なお、上記した実施例では、再度測位が可能になる測位
再開時刻13を表示する例で説明したが、再度測位が可
能になるまでの待ち時間であってもよい。In the above-described embodiment, an example was explained in which the positioning restart time 13 at which positioning becomes possible again is displayed, but the waiting time until positioning becomes possible again may be displayed.
また、最終情報の内の最終現在位置14の表示形態を変
化させる例で説明したが、走行軌跡12のみの表示形態
を変化させたり、走行軌跡12の表示形態をも変化させ
てもよい。Moreover, although the example in which the display format of the final current position 14 of the final information is changed has been described, the display format of only the travel trajectory 12 may be changed, or the display format of the travel trajectory 12 may also be changed.
さらに、最終情報の表示形態を点滅状態に変化させる例
で説明したが、表示の色を変化させたり、輝度を変化さ
せてもよいことは言うまでもない。Furthermore, although the example in which the display form of the final information is changed to a blinking state has been described, it goes without saying that the display color or brightness may also be changed.
以上のように、この発明によれば、GPS受信機による
測位が不可能な状態になった場合、電波の受信可能な人
工衛星数の不足によって測位が不可能なのか、電波の受
信可能な人工衛星数は足りているが、人工衛星からの電
波が遮断されたことによって測位が不可能なのかを、表
示部に再度測位が可能になる時刻もしくはその時刻まで
の待ち時間、さらに最終情報を、表示形態を変化させる
構成としたので、利用者は表示部を見ることにより、測
位の不可能がいずれによるものなのかを的確に把握する
ことができるという効果がある。As described above, according to the present invention, when positioning by a GPS receiver becomes impossible, whether positioning is impossible due to a lack of the number of artificial satellites that can receive radio waves, or There are enough satellites, but if positioning is not possible due to the radio waves from the satellite being cut off, the display will show the time when positioning will be possible again, the waiting time until that time, and the final information. Since the display format is changed, the user can accurately understand the cause of the inability to perform positioning by looking at the display unit.
第1図はこの発明の一実施例による車両用ナビゲーショ
ン装置の構成を示すブロック図、第2図は動作を説明す
るためのフローチャート、第3図および第4図は表示形
態の一例を示す説明図である。l・・・MPU、2・・・ROM、3・・・RAM、4
・・・操作部、5・・・ビデオRAM、6・・・CRT
コントローラ、7・・・CRT、8・・・GPS受信機
、9・・・CDROM、11・・・現在位置、12・・
・走行軌跡、13・・・測位再開時刻、14・・・最終
現在位置。FIG. 1 is a block diagram showing the configuration of a vehicle navigation device according to an embodiment of the present invention, FIG. 2 is a flowchart for explaining the operation, and FIGS. 3 and 4 are explanatory diagrams showing an example of a display form. It is. l...MPU, 2...ROM, 3...RAM, 4
...Operation unit, 5...Video RAM, 6...CRT
Controller, 7...CRT, 8...GPS receiver, 9...CDROM, 11...Current position, 12...
- Driving trajectory, 13... Positioning restart time, 14... Final current position.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6263090AJPH03264814A (en) | 1990-03-15 | 1990-03-15 | Nagivation apparatus for vehicle |
| EP91103291AEP0450325B1 (en) | 1990-03-06 | 1991-03-05 | Navigation apparatus for vehicles |
| DE69126630TDE69126630T2 (en) | 1990-03-06 | 1991-03-05 | Navigation device for vehicles |
| US08/352,816US5598339A (en) | 1990-03-06 | 1994-12-01 | Navigation apparatus for vehicles |
| US08/786,442US5752219A (en) | 1990-03-06 | 1997-01-21 | Navigation apparatus for vehicles |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6263090AJPH03264814A (en) | 1990-03-15 | 1990-03-15 | Nagivation apparatus for vehicle |
| Publication Number | Publication Date |
|---|---|
| JPH03264814Atrue JPH03264814A (en) | 1991-11-26 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6263090APendingJPH03264814A (en) | 1990-03-06 | 1990-03-15 | Nagivation apparatus for vehicle |
| Country | Link |
|---|---|
| JP (1) | JPH03264814A (en) |
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