JPH02113183U - - Google Patents
Info
- Publication number
- JPH02113183U JPH02113183U JP2172189U JP2172189U JPH02113183U JP H02113183 U JPH02113183 U JP H02113183U JP 2172189 U JP2172189 U JP 2172189U JP 2172189 U JP2172189 U JP 2172189U JP H02113183 U JPH02113183 U JP H02113183U
- Authority
- JP
- Japan
- Prior art keywords
- pulse width
- signal
- circuit
- transmission pulse
- transmission
- 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
- 241000251468 Actinopterygii Species 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
第１図は本考案の実施例の構成ブロツク図、第
２図は第１図の実施例における動作説明波形図、
第３図は従来の計量用魚群探知機のブロツク図、
第４図は単体魚と魚群の従来装置における表示画
像による判定状況説明図である。
１…送信部、２…送受波器、３…魚体用ＴＶＧ
付受信増幅部、４…魚群用ＴＶＧ付受信増幅部、
５，５′…送信制御部、６…Ａ／Ｄ変換器、７…
スレツシヨルド部、８…切換部、９，１０…メモ
リ、１１…単体エコー判定部、１２…単体魚エコ
ー、１３…魚群エコー、１４…干渉雑音。
FIG. 1 is a configuration block diagram of an embodiment of the present invention, FIG. 2 is a waveform diagram explaining the operation in the embodiment of FIG. 1,
Figure 3 is a block diagram of a conventional weighing fish finder.
FIG. 4 is an explanatory diagram of the state of determination based on display images of a single fish and a school of fish in a conventional device. 1... Transmitter, 2... Transmitter/receiver, 3... TVG for fish body
4... Reception amplifier unit with TVG for fish school,
5, 5'... Transmission control unit, 6... A/D converter, 7...
Threshold unit, 8...Switching unit, 9, 10...Memory, 11...Single echo determination unit, 12...Single fish echo, 13...Fish school echo, 14...Interference noise.
Claims (1)
パルス幅τ２の超音波送信パルスを指定された順
序で送信させる送信制御部と；受波信号を矩形波
状に整形する波形整形回路と；送信パルス幅がτ
１のときの受波信号の波形整形信号を記憶する第
１の記憶回路と；送信パルス幅がτ２のときの受
波信号の波形整形信号を記憶する第２の記憶回路
と；第１の記憶回路に記憶された信号と第２の記
憶回路に記憶された信号を読み出し対応する矩形
波同士の幅を比較し、その比がτ１τ２±許容範
囲内にあるか否かを判定し判定信号を出力する判
定回路と；を具備することを特徴とする魚群探知
機の単体魚判別回路。 a transmission control unit that causes the transmission unit to transmit an ultrasonic transmission pulse with a pulse width τ 1 and an ultrasonic transmission pulse with a pulse width τ 2 in a specified order; a waveform shaping circuit that shapes the received signal into a rectangular wave; Transmission pulse width is τ
a first storage circuit that stores a waveform-shaped signal of the received signal when the transmission pulse width is τ 1 ; a second storage circuit that stores the waveform-shaped signal of the received signal when the transmission pulse width is τ 2; The signal stored in the memory circuit and the signal stored in the second memory circuit are read out, the widths of the corresponding rectangular waves are compared, and it is determined whether the ratio is within the tolerance range of τ 1 τ 2 ±. A single fish discrimination circuit for a fish finder, comprising: a determination circuit that outputs a determination signal; and;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2172189U JPH02113183U (en) | 1989-02-27 | 1989-02-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2172189U JPH02113183U (en) | 1989-02-27 | 1989-02-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02113183U true JPH02113183U (en) | 1990-09-11 |
Family
ID=31239201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2172189U Pending JPH02113183U (en) | 1989-02-27 | 1989-02-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02113183U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013174473A (en) * | 2012-02-24 | 2013-09-05 | Furuno Electric Co Ltd | Underwater detection device and program |
-
1989
- 1989-02-27 JP JP2172189U patent/JPH02113183U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013174473A (en) * | 2012-02-24 | 2013-09-05 | Furuno Electric Co Ltd | Underwater detection device and program |
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