JPH03249518A - Automatic display system for vehicle position utilizing hyperbolic navigation - Google Patents
Automatic display system for vehicle position utilizing hyperbolic navigationInfo
- Publication number
- JPH03249518A JPH03249518A JP4560790A JP4560790A JPH03249518A JP H03249518 A JPH03249518 A JP H03249518A JP 4560790 A JP4560790 A JP 4560790A JP 4560790 A JP4560790 A JP 4560790A JP H03249518 A JPH03249518 A JP H03249518A
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- position signal
- base station
- loran
- receiver
- Prior art date
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- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000011079 streamline operation Methods 0.000 description 1
- 230000029305 taxis Effects 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
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Abstract
Description
【発明の詳細な説明】
し産業上の利用分野コ
本発明はタクシ−等の車輌の運行状態を中央管理室にお
いてモニターし、運行管理の合理化を計ることの出来る
Ａ Ｖ Ｍ （Ａｕｔｏｍａ口ｃ Ｖｅｈｉｃｌｅ Ｍ
ｏｎｉＬｏｒｉｎｇ ５ｙｓｔｅｔｎ ）方式を適用し
た車輌位置自動表示システムに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an AVM (Automatic Vehicle) system that can monitor the operating status of vehicles such as taxis in a central control room and streamline operation management. M
The present invention relates to an automatic vehicle position display system to which the oniLoring 5ystetn) method is applied.
［従来の技術］
従来の車輌位置表示システムとしては分散送信方式９分
散受信方式及び半自動方式の３方式が使用されており、
これらの特徴は下記の通りである。[Prior Art] As a conventional vehicle position display system, three methods are used: a distributed transmission method, a distributed reception method, and a semi-automatic method.
These characteristics are as follows.
Ｉ）分散送信方式はそれか設置された地点を示す位置信
号を常時発信する送信機（サインポスト）を街路又は建
物に分散設置し、移動局無線装置かこの位置信号を受信
し、移動局は車輌番号と車輌の活動状態等の情報を加え
て音声通話用の電波によって基地局無線装置（基地局）
に送信し、中央管理室において移動局の位置１車輌番号
等を把握するものである。I) In the distributed transmission method, transmitters (sign posts) that constantly emit position signals indicating the point at which they are installed are installed in a distributed manner on streets or buildings, and the mobile station radio equipment receives this position signal. In addition to information such as vehicle number and vehicle activity status, base station wireless equipment (base station) is transmitted using radio waves for voice calls.
The mobile station's location, vehicle number, etc. are determined by the central control room.
２）分散受信方式は移動局の車輌番号及び活動状態等の
情報の把握を必要とする地域内の適当な場所に受信設備
を分散配置し、移動局から音声通話用電波により送信さ
れる車輌番号その他の情報を受信した前記受信設備は、
有線によって基地局側の中央管理室に伝送し、これによ
り中央管理室では受信設備の所在する地域における移動
局の車輌番号及び活動状態等の情報を把握することか出
来る。2) In the distributed reception method, receiving equipment is distributed at appropriate locations within the area where it is necessary to know information such as the vehicle number and activity status of the mobile station, and the vehicle number is transmitted from the mobile station using radio waves for voice communication. The receiving equipment that received the other information is
The information is transmitted by wire to the central control room on the base station side, which allows the central control room to grasp information such as the vehicle number and activity status of the mobile station in the area where the receiving equipment is located.
３）半自動方式では、移動局の移動する地区は予め複数
の所在ゾーンに区画されており、移動局は所在ゾーンを
ボタン操作等によって設定し、中央管理室はポーリング
等によって音声通話用の電波を利用して所在ゾーン毎の
移動局の情報を収集するものである。3) In the semi-automatic method, the area in which the mobile station moves is divided in advance into multiple zones, the mobile station sets the zone in which it is located by button operation, etc., and the central control room transmits radio waves for voice calls by polling etc. This is used to collect information on mobile stations for each zone in which they are located.
上述した３つの方式により、基地局の中央管理室では移
動局からの返送信号を受けると該信号を処理して位置及
び車輌番号等を表示し、これによって所属する車輌の情
況を把握すると共に、音声通話用の電波により必要な配
車指示その他の連絡を行うことが出来る。Using the three methods described above, when the central control room of the base station receives a return signal from a mobile station, it processes the signal and displays the location, vehicle number, etc., thereby understanding the situation of the vehicle to which it belongs. Necessary dispatch instructions and other communications can be made using radio waves for voice calls.
［発明が解決しようとする課題］ このような従来システムは下記の問題が存在する。[Problem to be solved by the invention] Such conventional systems have the following problems.
分散送信方式及び分散受信方式においては、前記サイン
ポストのサービスゾーン内あるいは前記受信設備の受信
可能ゾーン内においては、移動局の正確な位置信号が得
られるものであり、送信機（サインポスト）あるいは受
信設備の間隔は密に設置されていることが望ましいが、
その場合には分散送信方式においては移動局の受信機に
おいて。In the distributed transmission system and the distributed reception system, an accurate position signal of the mobile station can be obtained within the service zone of the sign post or within the receivable zone of the reception equipment, and the transmitter (sign post) or It is desirable that the receiving equipment be installed close together;
In that case, in the distributed transmission system, at the receiver of the mobile station.
又分散受信方式においては受信設備の受信機側において
夫々混信による悪影響を生じ、且つ多数のサインポスト
あるいは受信設備を設置することは経済的に一限度があ
る。従って隣接するサインポスト間あるいは受信設備間
においては位置信号を受信することが出来ず１位置信号
の欠落を生じると共に、システム地区外においても同様
の状態を呈することにな。Furthermore, in the distributed reception system, there is an adverse effect due to interference on each receiver side of the receiving equipment, and there is an economical limit to installing a large number of sign posts or receiving equipment. Therefore, position signals cannot be received between adjacent sign posts or receiving equipment, resulting in the loss of one position signal, and a similar situation occurs outside the system area.
半自動方式においては、移動局の車輌位置設定を手動で
行うため、操作上の煩しさを伴うと共に設定ミス又は故
意に位置の誤表示を発生する等の欠点があった。In the semi-automatic method, since the vehicle position of the mobile station is manually set, it is troublesome to operate and has drawbacks such as setting errors or intentional incorrect display of the position.
なお以上の３つの方式とは別に、車輌位置表示方式に船
舶の航法システムに使用される双曲線航法か適用できな
いかという提案がなされたが、利用すべき地表波に空間
波が混入して電界が変動したり、送電線の電波雑音の影
響があったり、山地や高層ビルなどによる電波の障碍、
長いトンネルによる電波の途絶などに起因する誤差又は
位置信号が欠除したりする等の問題点があり、実用化の
見透しが立たないまま断念された経緯がある。なおこの
航法における位置精度は±２００メートル程度で１実用
的には許容し得るものである。In addition to the three methods mentioned above, a proposal was made to apply hyperbolic navigation, which is used in ship navigation systems, to the vehicle position display method, but it was proposed that space waves would mix with the surface waves that should be used, causing an electric field. fluctuations, radio wave noise from power lines, interference with radio waves due to mountains, high-rise buildings, etc.
There were problems such as errors due to radio wave interruption due to long tunnels and lack of position signals, and the system was abandoned without any prospects for practical use. Note that the positional accuracy in this navigation is approximately ±200 meters, which is acceptable for practical purposes.
本発明は前述の１）、２）、３）の３つの従来方式の問
題点の解決が困難と考えられるところから、上記の双曲
線航法の適用を再検討し、この方式が有する本質的な欠
点に影響されないような車輌位置自動位置表示システム
を提供しようとするものである。The present invention is based on the fact that it is considered difficult to solve the problems of the three conventional methods described in 1), 2), and 3). The purpose of the present invention is to provide an automatic vehicle position display system that is not affected by
［課題を解決するための手段］
本発明は上記の目的を達成するために、移動局の位置信
号を自動的に且つ連結的に基地局に送信できるようにす
ると共に、基地局からは、移動局側の位置信号の校正が
必要な場合には、移動局の所在地点に対応した正確な位
置信号を送信して。[Means for Solving the Problems] In order to achieve the above object, the present invention makes it possible to transmit a mobile station's position signal to a base station automatically and in a connected manner, and to transmit a mobile station's position signal from the base station to a base station. If the location signal on the station side needs to be calibrated, an accurate location signal corresponding to the location of the mobile station is transmitted.
移動局はこの位置信号を受信するようにしたものである
。The mobile station is designed to receive this position signal.
すなわち１本発明によるデツカ（ロラン）電波（双曲線
航法）を利用した車輌位置自動表示システムは、基地局
無線装置と複数の移動局車輌無線装置との間で交信を行
い、基地局無線装置からの要求に応して移動局車輌無線
装置から該移動局の所在する地点の位置信号、車輌識別
信号及び車輌の活動状態等を返送するようにした通信系
において、前記基地局無線装置に校正用の地区データフ
ァイルを有する中央処理装置を設けると共に、移動局車
輌無線装置においてデツカ（ロラン）電波を受信するデ
ツカ（ロラン）受信機と該デツカ（ロラン）受信機によ
って受信された位置信号が。In other words, the automatic vehicle position display system using Detsuka (Loran) radio waves (hyperbolic navigation) according to the present invention communicates between a base station wireless device and a plurality of mobile station vehicle wireless devices, and transmits information from the base station wireless device. In a communication system in which a mobile station vehicle radio device returns a location signal of the location of the mobile station, a vehicle identification signal, a vehicle activity state, etc. in response to a request, the base station radio device is provided with a calibration signal. A central processing unit having a district data file is provided, and a DETSUKA (LORAN) receiver for receiving DETSUKA (LORAN) radio waves in a mobile station vehicle radio device and a position signal received by the DETSUKA (LORAN) receiver are provided.
基地局無線装置より送信される校正用の位置信号によっ
て比較校正される位置信号校正装置を備え。Equipped with a position signal calibration device that compares and calibrates using position signals for calibration transmitted from base station wireless equipment.
デツカ（ロラン）送信局チェーンより送信される電波を
受信して得られた位置信号を基地局無線装置に送信して
、基地局無線装置のデツカ（ロラン）地区データファイ
ルを有する中央処理装置を介してＣＲＴデイスプレィ等
の表示装置上に当該移動局の所在地点を表示させる手段
と、基地局無線装置から得られる校正用の位置信号によ
って当該移動局の位置信号を比較校正する手段を備えた
ことを特徴とするものである。The position signal obtained by receiving the radio waves transmitted from the Detsuka (Loran) transmitting station chain is transmitted to the base station wireless device, and is transmitted via the central processing unit of the base station wireless device that has the Detsuka (Loran) area data file. means for displaying the location of the mobile station on a display device such as a CRT display, and means for comparing and calibrating the position signal of the mobile station with the position signal for calibration obtained from the base station radio equipment. This is a characteristic feature.
またもう１つの本発明による車輌位置表示システムは、
特定の地点（例えばタクシ−会社車庫構内等）に設置さ
れた構内位置信号校正用微小電力送信機の電波を移動局
車輌無線装置の受信機で受信して得られた位置信号によ
って当該移動局の位置信号を比較校正する手段を付加し
て成ることを特徴とするものである。Another vehicle position display system according to the present invention is
The receiver of the mobile station's in-vehicle radio equipment receives the radio waves from a low-power transmitter for calibrating an on-premise position signal installed at a specific point (for example, inside a taxi company garage), and uses the position signal obtained to determine the location of the mobile station. This is characterized by the addition of means for comparing and calibrating position signals.
さらにもう一つの本発明による車両位置自動表示システ
ムは、分散送信方式ＡＶＭシステムにおけるサインポス
トのエリア内に移動局が入った場合、このサインポスト
の位置信号をサインポスト受信機で受け、これをデツカ
（ロラン）受信機で受けた当該移動局の位置信号と比較
し、合致しなければサインポストの位置信号にするよう
にしたことを特徴とするものである。In yet another automatic vehicle position display system according to the present invention, when a mobile station enters the area of a sign post in a distributed transmission AVM system, a sign post receiver receives the position signal of the sign post, and the sign post receiver receives the position signal of the sign post. (Loran) It is characterized in that it is compared with the position signal of the mobile station received by the receiver, and if they do not match, the position signal of the sign post is used.
［実施例］
次に本発明による双曲線航法を利用した車輌位置自動表
示システムについて実施例を挙げ図面を参照して説明す
る。[Example] Next, an example of an automatic vehicle position display system using hyperbolic navigation according to the present invention will be described with reference to the drawings.
第１図は本発明による実施例の構成を示すブロック図で
ある。この図において１はデツカ（ロラン）送信局チェ
ーン、２は基地局無線装置、３は構内地区信号校正用微
小電力送信機、４は、移動局車輌無線装置である。FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention. In this figure, 1 is a Detsuka (Loran) transmitting station chain, 2 is a base station radio device, 3 is a small power transmitter for calibrating signals in a local area, and 4 is a mobile station vehicle radio device.
さらに２−０は基地局送受信機であって、制御装置２０
１．２−２マイクロホン、キーボード２−３．中央処理
装置２−４．ＣＲＴデイスプレィ２−５．およびプリン
ター２−６によって移動局送受信機４−０と交信を行い
１位置信号、車輌番号等をデイスプレィ上に表示するこ
とが出来る。Furthermore, 2-0 is a base station transceiver, which is a control device 20.
1.2-2 microphone, keyboard 2-3. Central processing unit 2-4. CRT display 2-5. The printer 2-6 communicates with the mobile station transceiver 4-0 and can display a position signal, vehicle number, etc. on the display.
更に地区データファイル２−７及び中央処理装置２−４
によって地図上の地名地番に対応する経緯度その他の地
区データを具備することができ、無線通話により所在地
点が明確な移動局に対し、その所在地に対応する位置信
号を送信することができる。Furthermore, district data file 2-7 and central processing unit 2-4
It is possible to have latitude, latitude, and other area data corresponding to place names and lot numbers on the map, and to transmit a position signal corresponding to the location to a mobile station whose location is clear by wireless communication.
移動局送受信機４−０は、中央処理装Ｗ４−１゜地区信
号校正装置４−３．地区信号出力装置４−４、地区信号
表示装置４−５．無線車車番発生器４−６．タクシ−メ
ータ４−７．緊急スイッチ４−８．制御器４−９および
マイクロフォン４−１０により基地局と交信を行い、移
動局の位置信号。The mobile station transceiver 4-0 includes a central processing unit W4-1° and a district signal calibration device 4-3. District signal output device 4-4, district signal display device 4-5. Radio car number generator 4-6. Taxi meter 4-7. Emergency switch 4-8. A controller 4-9 and a microphone 4-10 communicate with the base station to receive a position signal of the mobile station.
車輌番号等の情報を基地局に送信することができる。さ
らにデツカ（ロラン）受信機４−２により連続的に地区
信号を得ることができ、音声通話用の電波を利用して自
動的に基地局に送信することができる。またサインポス
ト受信機４−１１はサインポスト送信機５の電波を受信
して得られた地区信号を音声通話用の電波を利用して基
地局に送信することが出来る。Information such as vehicle number can be transmitted to the base station. Further, the Detsuka (Loran) receiver 4-2 can continuously obtain district signals, which can be automatically transmitted to the base station using radio waves for voice calls. Further, the sign post receiver 4-11 can receive the radio waves from the sign post transmitter 5 and transmit the obtained district signal to the base station using radio waves for voice communication.
地区信号校正装置４−３はデツカ（ロラン）受信機によ
り得られた位置信号と、移動局の所在に対応する予め校
正された基地局からの位置信号とを比較し１校正を行う
ことができ、前述したデツカ（ロラン）電波による位置
信号の誤差を補正し利用することが出来る。The district signal calibration device 4-3 can perform one calibration by comparing the position signal obtained by the Detsuka (Loran) receiver with the position signal from the base station that has been calibrated in advance and corresponds to the location of the mobile station. , it is possible to correct and utilize the error in the position signal due to the above-mentioned Detsuka (Loran) radio waves.
又特定の地点（例えばタクシ−会社車庫構内等）に設置
された３の構内地区信号校正用微小電力送信機の電波を
移動局の受信機で受信し、その出力地区信号でデツカ（
四ラン）受信機の位置信号を校正することもできる。更
にまた、サインポスト受信機４−１１により得られた地
区信号によって、前記と同様にデツカ（ロラン）受信機
の位置信号を校正することも出来る、デッカ（ロラン）
受信機には低入力レベルに対する警報装置が設けられて
おり、警報か表示された状態では上述の校正を行い位置
の誤差を補正する必要がある。In addition, the mobile station receiver receives radio waves from three low-power transmitters installed at specific points (for example, in taxi company garages, etc.) for calibrating signals in the local area, and the output area signal is used to calibrate the signal in the area.
(4 runs) It is also possible to calibrate the receiver position signal. Furthermore, the position signal of the Decca (Loran) receiver can be calibrated in the same way as described above using the district signal obtained by the sign post receiver 4-11.
The receiver is equipped with an alarm device for low input levels, and when an alarm is displayed, it is necessary to perform the above-mentioned calibration to correct position errors.
［発明の効果］
以上の説明により明かなように、本発明によれば船舶の
航法システムに使用されているデツカ（ロラン）電波を
受信し、移動局の位置決めを行うことにより、移動局の
移動に対応したリアルタイムに精度の高い位置情報を得
ることができる。[Effects of the Invention] As is clear from the above explanation, according to the present invention, the mobile station can be moved by receiving Detsuka (Loran) radio waves used in ship navigation systems and positioning the mobile station. You can obtain highly accurate location information in real time.
更に分散送信方式あるいは分散受信方式と併用すること
により、前記２方式における位置信号の欠落が補完され
、連続的に位置信号を得ることができ１位置の校正も簡
単に行うことができる。従って１本発明を例えばタクシ
−業務等に適用し中央管理室において効率のよい配車管
理を行うことができる。Furthermore, by using the distributed transmission method or the distributed reception method in combination, the lack of position signals in the above two methods can be supplemented, position signals can be obtained continuously, and calibration of one position can be easily performed. Therefore, the present invention can be applied to, for example, taxi services, and efficient vehicle dispatch management can be performed in the central control room.
第１図は本発明の実施例の構成を示すブロック図である
。
記号の説明：１はデツカ（ロラン）の送信局チェーン、
２は基地局無線装置、２−Ｏは基地局送受信機、２−１
は制御装置、２−２はマイクロフォン、２−３はキーボ
ード、２−４は中央処理装置、２−５はＣＲＴデイスプ
レィ、２−６はプリンタ、２−７はデツカ（ロラン）地
区データファイル、３は構内地区信号校正用微小電力送
信機。
４は移動局車輌無線装置ｔ、４−０は移動局送受信機、
４−１は中央処理装置、４−２はデツカ（ロラン）受信
機、４−３は地区信号校正装置、４−４は地区信号出力
装置、４−５は地区信号表示装置、４−６は無線車番発
生器、４−７はタクシ−メータ、４−８は緊急スイッチ
、４−９は制御器。
４−１０はマイクロフォン、４−１１はサインボスト受
信機、５はサインポスト送信機である。
手続補正書
（自発）
平成２年５月１１日FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. Symbol explanation: 1 is the transmitting station chain of Detsuka (Loran),
2 is a base station wireless device, 2-O is a base station transceiver, 2-1
is a control device, 2-2 is a microphone, 2-3 is a keyboard, 2-4 is a central processing unit, 2-5 is a CRT display, 2-6 is a printer, 2-7 is a Detsuka (Loran) district data file, 3 is a low-power transmitter for on-site area signal calibration. 4 is a mobile station vehicle radio device t; 4-0 is a mobile station transceiver;
4-1 is a central processing unit, 4-2 is a Detsuka (Loran) receiver, 4-3 is a district signal calibration device, 4-4 is a district signal output device, 4-5 is a district signal display device, and 4-6 is a district signal display device. A radio car number generator, 4-7 a taxi meter, 4-8 an emergency switch, and 4-9 a controller. 4-10 is a microphone, 4-11 is a signpost receiver, and 5 is a signpost transmitter. Procedural amendment (voluntary) May 11, 1990
Claims (3)
間で交信を行い、基地局無線装置からの要求に応じて移
動局車輌無線装置が該移動局車輌無線装置の位置信号、
車輌識別番号及び車輌の活動状態を返送するようにした
通信系において、 前記基地局無線装置に校正用の地区データファイルを有
する中央処理装置を設けると共に、移動局車輌無線装置
においてデッカ（ロラン）電波を受信するデッカ（ロラ
ン）受信機と、該デッカ（ロラン）受信機によって受信
された位置信号が、基地局無線装置より送信される校正
用位置信号によって比較校正される位置信号校正装置を
備え、デッカ（ロラン）送信局チェーンより送信される
電波をデッカ（ロラン）受信機により受信して得られた
位置信号を基地局無線装置に送信して、基地局無線装置
の地区データファイルを有する中央処理装置を介して表
示装置上に当該移動局の所在地名を表示させる手段と、
基地局無線装置から得られる校正用の位置信号によって
当該移動局の位置信号を比較校正する手段とを備えたこ
とを特徴とする、双曲線航法を利用した車輌位置自動表
示システム。(1) Communication is carried out between a base station wireless device and a plurality of mobile station vehicle wireless devices, and in response to a request from the base station wireless device, the mobile station vehicle wireless device receives a position signal of the mobile station vehicle wireless device,
In a communication system configured to return a vehicle identification number and vehicle activity status, the base station radio equipment is provided with a central processing unit having a district data file for calibration, and the mobile station vehicle radio equipment transmits Decca (Loran) radio waves. a Decca (Loran) receiver that receives the Decca (Loran) receiver, and a position signal calibration device in which the position signal received by the Decca (Loran) receiver is compared and calibrated with a calibration position signal transmitted from a base station wireless device, Central processing that receives the radio waves transmitted from the Decca (Loran) transmitting station chain by the Decca (Loran) receiver, transmits the obtained position signal to the base station radio equipment, and has the district data file of the base station radio equipment. means for displaying the location name of the mobile station on the display device via the device;
1. An automatic vehicle position display system using hyperbolic navigation, comprising means for comparing and calibrating a position signal of a mobile station using a position signal for calibration obtained from a base station radio device.
内地区信号校正用微小電力送信機を設置し、移動局が該
特定の地区にある時に、該微小電力送信機の電波を受信
して得た位置信号によって当該移動局の位置信号を校正
するようにしたことを特徴とする、特許請求の範囲第（
１）項の双曲線航法を利用した車輌位置自動表示システ
ム。(2) Install a micro-power transmitter for on-premise area signal calibration that constantly transmits the position signal of the point at a specific point, and receive radio waves from the micro-power transmitter when the mobile station is in the specific area. Claim No.
1) Automatic vehicle position display system using hyperbolic navigation.
点を示す位置信号を常時発信するサインポストのエリア
内に移動局が入った場合、このサインポストの電波を移
動局車両無線装置に組込まれたサインポスト受信機によ
り受信し、受信した位置信号をデッカ（ロラン）受信機
で受けた当該移動局の位置信号と比較校正し、合致しな
ければデッカ（ロラン）電波による位置信号を補正し利
用することを特徴とする特許請求の範囲第１項または第
２項の双曲線航法を利用した車両位置自動表示システム
。(3) In a distributed AVM system, when a mobile station enters the area of a signpost that constantly transmits a position signal indicating the location where it is installed, the radio waves of this signpost are transmitted to the signpost installed in the mobile station's vehicle radio equipment. The position signal received by the post receiver is compared and calibrated with the position signal of the mobile station received by the Decca (Loran) receiver, and if they do not match, the position signal by Decca (Loran) radio waves is corrected and used. An automatic vehicle position display system using hyperbolic navigation according to claim 1 or 2, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4560790A JPH03249518A (en) | 1990-02-28 | 1990-02-28 | Automatic display system for vehicle position utilizing hyperbolic navigation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4560790A JPH03249518A (en) | 1990-02-28 | 1990-02-28 | Automatic display system for vehicle position utilizing hyperbolic navigation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03249518A true JPH03249518A (en) | 1991-11-07 |
Family
ID=12724049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4560790A Pending JPH03249518A (en) | 1990-02-28 | 1990-02-28 | Automatic display system for vehicle position utilizing hyperbolic navigation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03249518A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0997398A (en) * | 1995-09-28 | 1997-04-08 | Unyusho Senpaku Gijutsu Kenkyusho | Method and device for automatic subordinate monitoring of moving body |
-
1990
- 1990-02-28 JP JP4560790A patent/JPH03249518A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0997398A (en) * | 1995-09-28 | 1997-04-08 | Unyusho Senpaku Gijutsu Kenkyusho | Method and device for automatic subordinate monitoring of moving body |
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