JPH0213989Y2 - - Google Patents
Info
- Publication number
- JPH0213989Y2 JPH0213989Y2 JP1982150832U JP15083282U JPH0213989Y2 JP H0213989 Y2 JPH0213989 Y2 JP H0213989Y2 JP 1982150832 U JP1982150832 U JP 1982150832U JP 15083282 U JP15083282 U JP 15083282U JP H0213989 Y2 JPH0213989 Y2 JP H0213989Y2
- Authority
- JP
- Japan
- Prior art keywords
- cross
- memory circuit
- ppi
- display
- sectional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 12
- 241000251468 Actinopterygii Species 0.000 description 17
- 230000005540 biological transmission Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【考案の詳細な説明】
本考案は超音波を用いて魚群などの水中物体を
探知するソナーの表示装置に関するものである。[Detailed Description of the Invention] The present invention relates to a sonar display device that uses ultrasonic waves to detect underwater objects such as schools of fish.
ソナーで探知した魚群の情報をブラウン管の映
像面に表示する際、自船から魚群までの距離と、
併せて自船に対する魚群の方向を平面図形として
表示する所謂PPI表示方式が一般に広く用いられ
ていることは周知の通りである。 When displaying information on fish schools detected by sonar on the CRT screen, the distance from your boat to the fish school,
Additionally, it is well known that the so-called PPI display method, which displays the direction of a school of fish relative to one's own boat as a planar figure, is widely used.
PPI方式は、自船から水平方向又は適宜の角度
だけ傾けた方向に超音波を送出して魚群を探知
し、魚群までの距離と、どの方向に魚群が居るか
が判るから、漁撈の面で大変有効であることは明
らかであるが、魚群の実態を更に一層詳しく把握
するためには、PPI方式では表示されない魚群の
深度に対する分布状態、換言すれば鉛直方向に関
する断面内の情報を示す断面表示が合わせて得ら
れゝば更に効果が大きい。 The PPI method detects schools of fish by sending out ultrasonic waves from your own boat horizontally or in a direction tilted at an appropriate angle, and the distance to the schools of fish and the direction in which they are located can be determined, making it useful for fishing. Although it is clear that it is very effective, in order to understand the actual situation of fish schools in even more detail, it is necessary to display a cross-sectional display that shows the distribution state of fish schools with respect to depth, which is not displayed with the PPI method, or in other words, information within the cross-section in the vertical direction. The effect will be even greater if both are obtained together.
本考案はかゝる観点からなされたもので、ブラ
ウン管の映像面の表示区域を例えば上下の二区域
に分け、一方の区域にPPI表示を行い、他方の区
域には断面表示し、両者の映像を併せて観察して
豊富な魚群情報を容易に把握できるようにしたも
のである。 The present invention was developed from such a viewpoint.The display area of the picture screen of a CRT is divided into two areas, for example, upper and lower, and PPI display is performed in one area, and a cross-section is displayed in the other area. This makes it possible to easily grasp a wealth of information about fish schools by observing them together.
すなわちPPI表示は従来のように行い、断面表
示のための情報は、適宜に決めた一定の角度例え
ば5゜毎に順次に90゜まで超音波ビームの中心方位
を傾けて探知し、深度に対する断面内の情報を把
握するようにしてある。 In other words, the PPI display is performed as before, and the information for cross-section display is obtained by tilting the center direction of the ultrasound beam sequentially at an appropriately determined angle, for example, every 5 degrees up to 90 degrees, and detecting the cross-section with respect to depth. I am trying to understand the information inside.
この場合、PPI表示のための超音波送出と、断
面表示のための超音波送出とを交互に行つて相互
の干渉を避けるようにし、PPI表示の情報と、断
面表示の情報にそれぞれ対応するように記憶し、
必要なデータを読み出して映像に示すものである
が、とくに断面像は、どの断面を示したいという
とき、人為的にその断面位置を選定すれば、瞬時
に選定した方向の断面図が得られるように構成し
てあることが本考案の特長である。 In this case, ultrasound transmission for PPI display and ultrasound transmission for cross-section display are performed alternately to avoid mutual interference, and the information on the PPI display and the information on the cross-section display are respectively corresponded to. memorize it,
The necessary data is read out and shown on the image, but in particular when it comes to cross-sectional images, when you want to show a cross-section, if you manually select the position of that cross-section, you can instantly obtain a cross-sectional view in the selected direction. The feature of this invention is that it is configured as follows.
次に第１図に示す実施例のブロツク図を参照し
て説明する。 Next, an explanation will be given with reference to the block diagram of the embodiment shown in FIG.
図のＳ−１とＳ−２は連動するスイツチであ
り、図では便宜上機械的スイツチの形で示してあ
るが、実際には高速切換を行う電子スイツチが用
いられており後述の通り作動する。 S-1 and S-2 in the figure are interlocking switches, which are shown in the form of mechanical switches for convenience, but in reality, electronic switches for high-speed switching are used and operate as described below.
すなわちPPI表示の場合は、スイツチはそれぞ
れＡ−１とＡ−２側に接続されており、一定の周
期で制御回路２から送信タイミンダパルスＰ１と
俯角制御パルスＰ３が同時に送出され、送受信器
３の送信部と俯角制御回路８に印加され俯角制御
信号Ｐ４を送出するよう構成されている。 In other words, in the case of PPI display, the switches are connected to the A-1 and A-2 sides, respectively, and the control circuit 2 sends out the transmission timing pulse P1 and the depression angle control pulse P3 at the same time at a constant cycle, and the transmitter/receiver 3 It is configured to be applied to the transmitting section of and the depression angle control circuit 8 to send out the depression angle control signal P4.
先ず第１発目の送信タイミンダパルスＰ１によ
つて送受波器１が駆動されるが同時に俯角制御信
号Ｐ４によつて所定の俯角（θm）が与えられる
ので第３図に示すような送信ビーム３１が全周方
向に送出される。 First, the transducer 1 is driven by the first transmission timing pulse P1, and at the same time, a predetermined depression angle (θm) is given by the depression angle control signal P4, so that the transmission beam as shown in FIG. 3 is generated. 31 is sent out in the entire circumferential direction.
魚群、海底などから送受波器１に帰来する反射
波の信号は、送受信器３の受信部で増巾されスイ
ツチの接点Ａ−１とＡ−２を通り、例えばビデ
オ・ラム（Video RAM）と呼ばれる第１のメモ
リー回路４に送られ、アナログからデジタル信号
に変換（Ａ／Ｄ変換）されたあとで記憶される。 The signal of the reflected wave returning to the transducer 1 from a school of fish, the seabed, etc. is amplified by the receiving section of the transceiver 3, passes through contacts A-1 and A-2 of the switch, and is sent to, for example, a video RAM (Video RAM). The signal is sent to a first memory circuit 4 called 4, and is stored after being converted from an analog signal to a digital signal (A/D conversion).
ここで第１のメモリー回路は、第２図に示した
PPI表示部を記憶するMp部分と、断面表示部を
記憶するMv部分とに分割されていて、Mp部分
はPPI探索を行う毎に逐次新しい情報に書き換え
られるが、Mv部分は第２図に基づき後述するよ
うに、俯角θ１、θ２……θn毎に得られた情報
を切替器９によつて一旦第２のメモリー回路群１
０−１，１０−２……１０−ｎの各対応したメモ
リー回路１０−１，１０−２……１０−ｎに記憶
させた後に、所定の方位Ｄのみをθ１〜θn毎に
順次読み出して記憶するように構成されている。 Here, the first memory circuit is shown in Figure 2.
It is divided into an Mp part that stores the PPI display part and an Mv part that stores the cross-section display part.The Mp part is rewritten with new information each time a PPI search is performed, but the Mv part is based on Figure 2. As will be described later, the information obtained for each depression angle θ1, θ2...θn is temporarily transferred to the second memory circuit group 1 by the switch 9.
After storing in the corresponding memory circuits 10-1, 10-2...10-n, only the predetermined direction D is sequentially read out every θ1 to θn. configured to remember.
次に記憶された信号は読み出され、テレビタイ
プすなわちラスター走査のブラウン管５のグリツ
ド或はカソードＧに印加される。 The stored signal is then read out and applied to the grid or cathode G of a television type or raster scan cathode ray tube 5.
一方、前記制御回路２から送出されるパルス
P2はテレビ回路６に印加され、続いて該テレビ
回路６の出力は前記ブラウン管５の偏向コイル７
に印加される。 On the other hand, the pulse sent out from the control circuit 2
P 2 is applied to the television circuit 6, and the output of the television circuit 6 is then applied to the deflection coil 7 of the cathode ray tube 5.
is applied to
こゝでテレビ回路６はブラウン管の映像面に通
常のテレビの如く映像を表示するために必要な回
路であるが、一般のテレビ用のものと同様に構成
されている。 The television circuit 6 is a circuit necessary for displaying images on the picture surface of the cathode ray tube like a normal television, and is constructed in the same way as that for a general television.
かくしてブラウン管５の映像面には、予め決め
た一つの区域内に俯角θm方向のPPI像が表示さ
れる。 Thus, on the image plane of the cathode ray tube 5, a PPI image in the direction of the depression angle θm is displayed within one predetermined area.
断面表示の場合は、PPIに就て探知が終るとス
イツチがそれぞれＢ−１とＢ−２の接点側に切換
えられ、一方、前記制御回路２からは俯角制御パ
ルスP3が俯角制御回路８に送られ、その出力側
から俯角制御信号P4となつて前記送受信器３に
含まれる制御部に送られると、前記送受波器１の
俯角すなわちビーム中心方向の傾きが予め設定し
た角度θ1が例えば5゜傾けられ、前記の送信タイミ
ンダパルスP1の第２発目によつて送受波器１か
ら超音波が送出される。 In the case of cross-sectional display, when the PPI detection is completed, the switches are switched to the contact sides of B-1 and B-2, respectively, and on the other hand, the depression angle control pulse P 3 is sent from the control circuit 2 to the depression angle control circuit 8. When the depression angle control signal P 4 is sent from the output side to the control unit included in the transceiver 3, the depression angle of the transducer 1, that is, the inclination toward the beam center is adjusted to a preset angle θ 1 . For example, the transducer 1 is tilted by 5 degrees, and ultrasonic waves are transmitted from the transducer 1 by the second firing of the transmission timing pulse P1 .
反射信号は前記送受波器１と送受信器３を通
り、複数の接点Ｃ−１，Ｃ−２……Ｃ−ｎを有す
る切換器９に印加され、各接点を介してそれぞれ
１０−１，１０−２……１０−ｎなどの第２のメ
モリー回路群に送られ記憶される。続いて之等の
メモリー回路群の出力は座標変換器を含んで構成
された出力信号切換器１１によつて逐次切り換え
られながら前記第１のメモリー回路４のMv部分
に記憶されるように構成されている。 The reflected signal passes through the transducer 1 and the transceiver 3, and is applied to a switching device 9 having a plurality of contacts C-1, C-2... -2...10-n, etc., and is sent to the second memory circuit group and stored therein. Subsequently, the outputs of these memory circuit groups are stored in the Mv section of the first memory circuit 4 while being sequentially switched by an output signal switching device 11 that includes a coordinate converter. ing.
こゝで切換器９は、前記俯角制御器８の俯角制
御信号P4と同時に発生される制御パルスP5によ
つて切換えられるようになつているから、前記の
断面表示の状態においては、切換器９は接点Ｃ−
１に接続されており、したがつて１０−１の第２
のメモリー回路にはθ1方向の探知結果が記憶され
る。 Since the switch 9 is designed to be switched by the control pulse P5 generated at the same time as the depression angle control signal P4 of the depression angle controller 8 , in the state of the above-mentioned cross-sectional display, the switch 9 cannot be switched. The device 9 is the contact point C-
1 and therefore the second of 10-1
The detection results in the θ 1 direction are stored in the memory circuit.
θ1方向に対する断面表示のための探知が終る
と、前記スイツチＳ−２とＳ−２がPPI探知側Ａ
−１とＡ−２に切換えられてPPI探知の表示を行
い、次に前記スイツチＳ−１とＳ−２がＢ−１と
Ｂ−２に、また前記切換スイツチ９も切換えられ
θ2方向の断面表示の第２ステツプに移り、以下順
次に「PPI」から「断面」と交互に探知を繰り返
す。すなわち
（PPI例えばθm）→（断面例えば5゜）→
（PPIθm）→（断面10゜）→（PPIθm）→（断面）
……（PPI）……
という具合にPPIに対する探知と断面に対する探
知を交互に繰り返えして行う。 When the detection for displaying the cross section in the θ1 direction is completed, the switches S-2 and S-2 switch to the PPI detection side A.
-1 and A-2 to display PPI detection, then the switches S-1 and S-2 are switched to B-1 and B-2, and the changeover switch 9 is also switched to display the PPI detection in the θ 2 direction. Moving on to the second step of displaying the cross section, the detection is repeated sequentially from "PPI" to "cross section". That is, (PPI e.g. θm) → (cross section e.g. 5°) →
(PPIθm) → (cross section 10°) → (PPIθm) → (cross section)
...(PPI)... Detection for PPI and detection for cross section are repeated alternately.
前記の制御回路２の内部には、自船に対してど
の方位に対する断面をブラウン管に表示させるか
を指定するための選択回路が含まれており、手動
操作で適宜に断面方位（例えば方位Ｄ）を決める
と、断面位置制御器１２に制御パルスP2が送出
され、それに伴つて該断面位置制御器１２から発
生されるパルスP7によつて前記メモリー回路１
０−１などの回路群が駆動され、俯角θ１から
θnまでの各情報のうち指定された方位Ｄに関す
る情報が瞬時に読み出されて前記メモリー回路４
の中のブラウン管５の映像面に設定されたPPI像
が表示される区域に対応したMp部分に続く断面
像を表示する区域に対応したMv部分に記憶され
る。こうして前記メモリー回路４の情報を読み出
す時には、PPI探知情報に続いて方位Ｄにおける
俯角θ１からθ２までの断面像に関する情報が読
み出され、ブラウン管５にはPPI表示部にPPI像
が、そして断面表示部には所定方位における俯角
θ１からθnまでの断面像が表示されるのである。 The control circuit 2 includes a selection circuit for specifying which direction of the own ship the cross section is to be displayed on the cathode ray tube, and manually selects the cross section direction (for example, direction D) as appropriate. Once determined, a control pulse P 2 is sent to the section position controller 12, and the memory circuit 1 is controlled by the pulse P 7 generated from the section position controller 12.
The circuit groups such as 0-1 are driven, and among the information on the depression angles θ1 to θn, information regarding the designated direction D is instantaneously read out and stored in the memory circuit 4.
The PPI image set on the image plane of the cathode ray tube 5 is stored in the Mp part corresponding to the area to be displayed, followed by the Mv part corresponding to the area to display the cross-sectional image. In this way, when reading out the information in the memory circuit 4, following the PPI detection information, information regarding the cross-sectional image from the angle of depression θ1 to θ2 in the direction D is read out, and the PPI image is displayed on the PPI display section of the cathode ray tube 5, and the cross-sectional image is displayed on the PPI display section of the cathode ray tube 5. In this section, a cross-sectional image from angle of depression θ1 to θn in a predetermined direction is displayed.
違つた方向の断面を観察したい場合は、前記断
面位置制御部１２を制御すれば、直ちに指定方向
の断面像が得られる。 When it is desired to observe a cross section in a different direction, by controlling the cross section position control section 12, a cross section image in the specified direction can be immediately obtained.
第２図はブラウン管像のモデル図であり、上方
の区域には自船２０を中心とし、俯角θmの場合
の例として海底２１と魚群２２がPPI像で示さ
れ、魚群までの距離Ｒと方位Ｄが一目で判る。 Fig. 2 is a model diagram of a cathode ray tube image. In the upper area, the seabed 21 and a school of fish 22 are shown as a PPI image with the own ship 20 as the center, as an example when the angle of depression is θm, and the distance R and direction to the school of fish are shown. D can be seen at a glance.
そして下方の区域には発振数２４（自船位置に
相当）と海底２５及び魚群２６が断面図で示され
ており、この断面はPPI像における方位Ｄを示す
表示線２３で示された方位のものである。 In the lower area, the oscillation number 24 (corresponding to the own ship's position), the seabed 25, and the school of fish 26 are shown in a cross-sectional view, and this cross-section is in the direction indicated by the indicator line 23 indicating the direction D in the PPI image. It is something.
なお断面像の表示線２７などは探知方向を示す
軌跡であり、俯角に対する信号の区分として便宜
上表示したものである。 Note that the display line 27 of the cross-sectional image is a locus indicating the detection direction, and is displayed for convenience as a division of the signal with respect to the depression angle.
本考案は以上の説明で明らかな通り、PPI像で
魚群の方位と距離が表示されると同時に、自船に
対して任意の方位における深度に関する断面の魚
群分布の情報が示され、かつ所望の方位を撰定し
て、その方位の断面像を瞬時に描くことができる
ようになつているから、多角的にしかも正確に魚
群の情報を把握することができるので実用上の効
果は極めて大きい。 As is clear from the above explanation, the present invention displays the direction and distance of a school of fish in a PPI image, and at the same time shows information on the distribution of fish schools in a cross-section with respect to depth in any direction relative to the own ship. Since it is now possible to select a direction and instantaneously draw a cross-sectional image in that direction, it is possible to grasp information about schools of fish from multiple angles and accurately, which has an extremely large practical effect.
第１図は実施例のブロツク図。第２図はブラウ
ン管映像のモデル図。第３図は送受信ビームの態
様を示す説明図。
１……送受波器、２……制御回路、３……送受
信器、４……第１のメモリー回路、５……ブラウ
ン管、６……テレビ回路、７……偏向コイル、８
……俯角制御回路、９……切換器、１０−１〜１
０−ｎ……第２のメモリー回路群、１１……出力
信号切換器、１２……断面位置制御器、２１，２
５……海底、２２，２６……魚群。
FIG. 1 is a block diagram of an embodiment. Figure 2 is a model diagram of a cathode ray tube image. FIG. 3 is an explanatory diagram showing the mode of transmitting and receiving beams. DESCRIPTION OF SYMBOLS 1... Transmitter/receiver, 2... Control circuit, 3... Transmitter/receiver, 4... First memory circuit, 5... Braun tube, 6... Television circuit, 7... Deflection coil, 8
...Depression angle control circuit, 9...Switcher, 10-1 to 1
0-n...Second memory circuit group, 11...Output signal switcher, 12...Cross-sectional position controller, 21,2
5... Seabed, 22, 26... School of fish.
Claims (1)
するソナーにおいて、情報を含んだ探知信号を、
ブラウン管の映像面に設定した一方の区域には
PPI表示するように構成した処理系と、他方の区
域には断面図形として表示するように構成した処
理系とが交互に切換えられるようになつており、
上記のPPI表示の処理系は、制御回路のパルスで
制御される送受信器と、水平方向又は一定角度傾
けた方向に超音波を送出すると共に帰来する情報
信号を受ける送受波器と、前記送受信器の後段に
切換えスイツチの一方の接点を介して接続されて
おり、前記送受信器を経た情報信号をPPI表示す
るための情報を記憶させるMp部分と断面表示す
るための情報を記憶させるMv部分とを有する第
１のメモリー回路と、該第１のメモリー回路の
Mp部分から読み出された信号がPPI表示される
ようにしたブラウン管などで構成され、一方断面
図形として表示する処理系は、前記送受波器の俯
角を予め設定した角度毎に順次に、前記制御回路
のパルスで制御されて切換える俯角制御回路と、
前記切換えスイツチの他方の接点に接続されてお
り、該俯角制御回路の出力パルスで複数個の接点
が前記送受波器の俯角に対応して切換えられる切
換器と、該切換器の各々の接点毎に接続された第
２のメモリー回路群と、該第２のメモリー回路群
の出力が印加される出力信号切換器と、前記制御
回路によつて制御され、該第２のメモリー回路群
に断面位置を制御するパルスを送る断面位置制御
器と、前記出力信号切換器の出力と前記切換スイ
ツチの接点を介して接続され、前記第２のメモリ
ー回路群に記憶された所定の方位の断面表示情報
を読み出してMv部分に記憶させる前記第１のメ
モリー回路と、該第１のメモリー回路の後段に接
続された前記ブラウン管などで構成されており、
該ブラウン管はラスター走査されるタイプであつ
て、その偏向コイルに前記制御回路の信号で駆動
されるテレビ回路の出力が印加され、２つの区域
に分けられた前記ブラウン管の映像面に、一方の
区域には第１のメモリー回路のMp部分に記憶さ
れたPPI像を、他方の区域には第１のメモリー回
路のMv部分に記憶された断面像が表示されるよ
う構成されていることを特徴とするソナーの表示
装置。 In sonar, which detects underwater objects by sending out ultrasonic waves in a desired direction, a detection signal containing information is
One area set on the picture plane of the cathode ray tube has
The processing system configured to display PPI and the processing system configured to display cross-sectional figures in the other area can be switched alternately.
The above PPI display processing system includes a transceiver that is controlled by pulses from a control circuit, a transducer that transmits ultrasonic waves in a horizontal direction or a direction tilted at a certain angle, and receives returning information signals, and the transceiver that is controlled by pulses from a control circuit. It is connected to the latter stage through one contact of the changeover switch, and has an Mp part that stores information for displaying the information signal via the transmitter/receiver as PPI, and an Mv part that stores information for cross-sectional display. a first memory circuit having a
The signal read from the Mp section is composed of a cathode ray tube or the like that is displayed as a PPI, and the processing system that displays the signal as a cross-sectional figure sequentially displays the inclination angle of the transducer at each preset angle. A depression angle control circuit that is controlled by circuit pulses and switches;
a switch connected to the other contact of the changeover switch, the plurality of contacts being switched in accordance with the depression angle of the transducer by an output pulse of the depression angle control circuit; and a switch for each contact of the switch. a second memory circuit group connected to the second memory circuit group; an output signal switcher to which the output of the second memory circuit group is applied; a cross-sectional position controller that sends a pulse to control the cross-sectional position controller, which is connected through the output of the output signal switch and the contact of the changeover switch, and displays cross-sectional display information in a predetermined direction stored in the second memory circuit group. It is composed of the first memory circuit which is read out and stored in the Mv section, and the cathode ray tube connected to the rear stage of the first memory circuit,
The cathode ray tube is of a raster scanning type, and the output of a television circuit driven by a signal from the control circuit is applied to its deflection coil, so that the image plane of the cathode ray tube is divided into two areas, one area is The area is configured such that the PPI image stored in the Mp portion of the first memory circuit is displayed, and the cross-sectional image stored in the Mv portion of the first memory circuit is displayed in the other area. sonar display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15083282U JPS5956578U (en) | 1982-10-06 | 1982-10-06 | sonar display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15083282U JPS5956578U (en) | 1982-10-06 | 1982-10-06 | sonar display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5956578U JPS5956578U (en) | 1984-04-13 |
| JPH0213989Y2 true JPH0213989Y2 (en) | 1990-04-17 |
Family
ID=30334421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15083282U Granted JPS5956578U (en) | 1982-10-06 | 1982-10-06 | sonar display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5956578U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62285086A (en) * | 1986-06-04 | 1987-12-10 | Furuno Electric Co Ltd | Sonar signal time passage display unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52112344A (en) * | 1976-03-18 | 1977-09-20 | Kaijo Denki Kk | System for indicating braun tube image in soner |
| JPS53121656A (en) * | 1977-03-30 | 1978-10-24 | Furuno Electric Co | Sonar |
| JPS56162068A (en) * | 1980-05-19 | 1981-12-12 | Furuno Electric Co Ltd | Simultaneous display device for different kinds of underwater detection information |
| JPS57196172A (en) * | 1981-05-27 | 1982-12-02 | Japan Radio Co Ltd | Device to display object in water |
-
1982
- 1982-10-06 JP JP15083282U patent/JPS5956578U/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52112344A (en) * | 1976-03-18 | 1977-09-20 | Kaijo Denki Kk | System for indicating braun tube image in soner |
| JPS53121656A (en) * | 1977-03-30 | 1978-10-24 | Furuno Electric Co | Sonar |
| JPS56162068A (en) * | 1980-05-19 | 1981-12-12 | Furuno Electric Co Ltd | Simultaneous display device for different kinds of underwater detection information |
| JPS57196172A (en) * | 1981-05-27 | 1982-12-02 | Japan Radio Co Ltd | Device to display object in water |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5956578U (en) | 1984-04-13 |
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