JPH0289380U - - Google Patents
Info
- Publication number
- JPH0289380U JPH0289380U JP16984188U JP16984188U JPH0289380U JP H0289380 U JPH0289380 U JP H0289380U JP 16984188 U JP16984188 U JP 16984188U JP 16984188 U JP16984188 U JP 16984188U JP H0289380 U JPH0289380 U JP H0289380U
- Authority
- JP
- Japan
- Prior art keywords
- tvg
- frequency
- storage means
- ultrasonic
- ultrasonic waves
- 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.)
- Pending
Links
- 238000002592 echocardiography Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図はこの考案のＴＶＧ装置を適用した魚群
探知機の一実施例を示す概略ブロツク図、第２図
は、第１図におけるＴＶＧ装置の一実施例を示す
制御ブロツク図、第３図及び第４図は、第２図に
おけるＥＰＲＯＭのメモリマツプ図及び、端子名
を示す図、第５図及び第６図は、第１図及び第２
図の装置における動作を示すタイムチヤートであ
る。
１……ＣＰＵ、２……ＲＯＭ、３……ＲＡＭ、
４……送信部、５，１０……入出力部、６……送
受波器、７……送受切換器、８……受信部、９…
…Ａ／Ｄ変換器、１１……ＴＶＧ回路、１２……
アンドゲート、１３……表示コントローラ、１４
……表示器、２１……ＥＰＲＯＭ、２２……周波
数切換回路、２３……ＴＶＧモード切換器、２４
……アドレス制御回路、２５，２６……ラツチ回
路、２７……分周器、２８……クロツク回路、２
９……タイミング回路、３０，３１……Ｄ／Ａ変
換器。
FIG. 1 is a schematic block diagram showing an embodiment of a fish finder to which the TVG device of this invention is applied, FIG. 2 is a control block diagram showing an embodiment of the TVG device in FIG. 1, and FIGS. FIG. 4 is a memory map diagram of the EPROM in FIG. 2 and a diagram showing the terminal names, and FIGS.
3 is a time chart showing the operation of the device shown in the figure. 1...CPU, 2...ROM, 3...RAM,
4... Transmitting section, 5, 10... Input/output section, 6... Transmitter/receiver, 7... Transmitting/receiving switch, 8... Receiving section, 9...
...A/D converter, 11...TVG circuit, 12...
AND gate, 13...display controller, 14
... Display device, 21 ... EPROM, 22 ... Frequency switching circuit, 23 ... TVG mode switching device, 24
... Address control circuit, 25, 26 ... Latch circuit, 27 ... Frequency divider, 28 ... Clock circuit, 2
9...timing circuit, 30, 31...D/A converter.
補正 平１．１２．２７
図面の簡単な説明を次のように補正する。
明細書第１５頁８行に「１２……アンドゲート
」とあるを「１２……オアゲート」に訂正する。Amendment 1.12.27 Hei 1. The brief description of the drawing is amended as follows. On page 15, line 8 of the specification, the phrase "12...and gate" is corrected to "12...or gate."
Claims (1)
増幅器に対し、超音波の伝搬損失を補償できるよ
うに利得を変化させるＴＶＧ装置において、 複数の異なる超音波周波数毎にＴＶＧ制御のた
めのデータを記憶する一つの記憶手段と、用いた
超音波の周波数に応じて、前記記憶手段より、該
周波数に対応するデータを読み出すデータ読出手
段と、読み出したデータより、上記増幅器に対す
る利得制御信号に適するアナログ信号に変換する
Ｄ／Ａ変換器とを備えたことを特徴とするＴＶＧ
装置。[Scope of Claim for Utility Model Registration] In a TVG device that changes the gain of an amplifier that receives reflected echoes of ultrasonic waves emitted into water so as to compensate for the propagation loss of ultrasonic waves, for each of a plurality of different ultrasonic frequencies. one storage means for storing data for TVG control; a data reading means for reading out data corresponding to the frequency from the storage means according to the frequency of the ultrasonic wave used; and a D/A converter for converting the gain control signal into an analog signal suitable for the TVG.
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16984188U JPH0289380U (en) | 1988-12-27 | 1988-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16984188U JPH0289380U (en) | 1988-12-27 | 1988-12-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0289380U true JPH0289380U (en) | 1990-07-16 |
Family
ID=31460259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16984188U Pending JPH0289380U (en) | 1988-12-27 | 1988-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0289380U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4922846A (en) * | 1972-06-20 | 1974-02-28 | ||
| JPS507868U (en) * | 1973-05-19 | 1975-01-27 | ||
| JPS58165073A (en) * | 1982-03-25 | 1983-09-30 | Mitsubishi Heavy Ind Ltd | Distance amplitude correction circuit |
-
1988
- 1988-12-27 JP JP16984188U patent/JPH0289380U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4922846A (en) * | 1972-06-20 | 1974-02-28 | ||
| JPS507868U (en) * | 1973-05-19 | 1975-01-27 | ||
| JPS58165073A (en) * | 1982-03-25 | 1983-09-30 | Mitsubishi Heavy Ind Ltd | Distance amplitude correction circuit |
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