JPH0138541Y2 - - Google Patents
Info
- Publication number
- JPH0138541Y2 JPH0138541Y2 JP1982121107U JP12110782U JPH0138541Y2 JP H0138541 Y2 JPH0138541 Y2 JP H0138541Y2 JP 1982121107 U JP1982121107 U JP 1982121107U JP 12110782 U JP12110782 U JP 12110782U JP H0138541 Y2 JPH0138541 Y2 JP H0138541Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- diode
- charging
- parallel
- series connection
- 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
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000003321 amplification Effects 0.000 claims description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 1
- 230000033001 locomotion Effects 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】
〔産業上の利用分野〕
本考案は超音波パルス波を水中に発射して得ら
れる反射波を受信・増幅して被探知物の探知信号
を得るようにした水中探知装置に関するものであ
る。[Detailed description of the invention] [Industrial application field] The present invention is an underwater detection system in which an ultrasonic pulse wave is emitted into the water and the reflected waves obtained are received and amplified to obtain a detection signal for the object to be detected. It is related to the device.
この種の装置、つまり、魚群探知機・測深機な
どにおいては、強力な送信パルス信号を送受波器
に送り、超音波パルス波に変換して水中に発射す
ることにより得られる反射波を同一の送受波器に
より受波し、電気信号に変換して増幅回路に与え
るように構成されている。
In this type of equipment, such as fish finders and depth sounders, a strong transmission pulse signal is sent to a transducer, converted into an ultrasonic pulse wave, and emitted into the water. It is configured to receive the wave with a transducer, convert it into an electrical signal, and provide it to the amplifier circuit.
一般に、送受波器や受信入力回路は、感度向上
のため、送信時の強力な信号により残響が生じ
て、探知表示像中のいわゆる発振線の幅を大きく
することになり、浅い深度における探知能力を低
下させる原因になつている。 Generally, in order to improve the sensitivity of transducers and receiving input circuits, strong signals during transmission cause reverberation, which increases the width of the so-called oscillation line in the detection display image, making it difficult to detect at shallow depths. It is causing a decline in
このため、こうした装置において、受信・増幅
回路の入力回路に、コイルと同調蓄電器とを並列
に接続した並列共振回路（本考案において、共振
回路という）を設け、この共振回路の両端に抵抗
を並列に接続し、または、さらに、これと並列に
ダイオードを正・逆に接続して残響を抑圧する回
路を設ける手段のものが、実公昭55−55422・実
公昭56−9982などにより開示されている。 For this reason, in such devices, a parallel resonant circuit (referred to as a resonant circuit in this invention) in which a coil and a tuned capacitor are connected in parallel is provided in the input circuit of the receiving/amplifying circuit, and a resistor is connected in parallel to both ends of this resonant circuit. Japanese Utility Model Publication No. 55-55422, Publication Utility Model No. 56-9982, etc. disclose means for providing a circuit for suppressing reverberation by connecting diodes to the reverberation circuit or connecting diodes in parallel with the reverberation circuit in positive and reverse directions. .
また、超音波パルスを発射するための送信出力
の一部のエネルギーを蓄積する回路を設けて、こ
の蓄電したエネルギーにより受信・増幅回路全体
を動作させるなどによつて、送信回路と受信回路
との動作を分離する手段のものが特開昭54−
91365などにより開示されている。 In addition, by providing a circuit that stores part of the energy of the transmission output for emitting ultrasonic pulses, and using this stored energy to operate the entire reception/amplification circuit, the transmission circuit and reception circuit can be connected. A method for separating the motions was published in 1983.
91365 and others.
しかし、これらの手段では、単に共振回路のＱ
を抵抗により低下させるか、または、受信・増幅
回路の電源を制御するだけなので、受信パルス信
号の大きさと長さに応して残響の抑圧を行わせる
ように構成できないという不都合がある。 However, these methods simply reduce the Q of the resonant circuit.
Since the reverberation is reduced by a resistor or only the power supply of the receiving/amplifying circuit is controlled, there is a disadvantage that it is not possible to suppress the reverberation in accordance with the magnitude and length of the received pulse signal.
そして、受信回路の感度を時間経過後に制御す
る手段、例えば、S.T.C（感度時間制御）回路に
おいては、送信のためのタイミングパルスによつ
て時間的に変化する偏寄電圧を作り、この電圧を
トランジスタなどの増幅素子に加えて送信直後の
増幅度を下げた後、次第に感度を上昇させるよう
な方法がとられている。 Then, in a means for controlling the sensitivity of the receiving circuit after time elapses, such as an STC (sensitivity time control) circuit, a biased voltage that changes over time is created by a timing pulse for transmission, and this voltage is applied to a transistor. In addition to an amplification element such as the above, a method is used in which the amplification level is lowered immediately after transmission, and then the sensitivity is gradually increased.
この方法では、残響の減衰特性と増幅素子の増
幅特性とを合致させることが難しいなどの不都合
がある。 This method has disadvantages such as difficulty in matching the reverberation attenuation characteristics with the amplification characteristics of the amplification element.
こうした不都合を、上記の各手段を適宜に組み
合わて解決することが考えられるが、回路が複雑
高価な構成になる割に、実用的な残響抑圧効果を
もつものが得にくい。
Although it is possible to solve these problems by appropriately combining the above-mentioned means, it is difficult to obtain a circuit with a practical dereverberation effect since the circuit is complicated and expensive.
このため、ごく簡単な回路構成によつて、上記
の不都合を解決した簡便安価な装置の提供が望ま
れているという課題がある。 For this reason, there is a problem in that it is desired to provide a simple and inexpensive device that solves the above-mentioned disadvantages with a very simple circuit configuration.
本考案は、超音波パルス波を水中に発射して得
られる反射波を受信・増幅して被探知物の探知信
号を得るようにした水中探知装置において、
蓄電器と第１のダイオードとの直列接続回路
を、受信・増幅のための入力回路に設けた共振回
路に並列に付加することにより、共振回路の出力
信号を整流して充電するための充電回路を形成す
る充電手段と、
電流の変化によつてインピーダンスの変化する
第２のダイオードと抵抗との直列接続回路を、第
２のダイオードの極性を第１のダイオードの極性
と逆極性に配置して、第１のダイオードに並列に
付加することにより、充電回路の充電された電荷
を共振回路を介して放電するための放電回路を形
成する放電手段と
を設けることにより、上記の課題を解決したもの
である。
The present invention is an underwater detection device that receives and amplifies the reflected waves obtained by emitting ultrasonic pulse waves into the water to obtain a detection signal for an object to be detected. A charging means that forms a charging circuit for rectifying and charging the output signal of the resonant circuit by adding a circuit in parallel to the resonant circuit provided in the input circuit for reception and amplification; Therefore, a series connection circuit of a second diode and a resistor whose impedance changes can be added in parallel to the first diode by arranging the polarity of the second diode to be opposite to that of the first diode. Accordingly, the above-mentioned problem has been solved by providing a discharging means forming a discharging circuit for discharging the charges charged in the charging circuit via a resonant circuit.
以下、図面により実施例を説明する。 Examples will be described below with reference to the drawings.
第１図において、１は送受波器、２は送受結合
回路、３は送信信号発生回路であり、送信時には
送信信号発生回路３により強力な電気信号パルス
波が作られ、送受結合回路２を通して送受波器１
に送られ、超音波パルス波に変換されて水中に発
射される。 In Fig. 1, 1 is a transducer, 2 is a transmitting/receiving coupling circuit, and 3 is a transmitting signal generating circuit. During transmission, the transmitting signal generating circuit 3 generates a strong electric signal pulse wave, which is transmitted and received through the transmitting/receiving coupling circuit 2. Wave device 1
, which is converted into an ultrasonic pulse wave and launched into the water.
水中の被探知物からの反射波は送受波器１によ
り受波されて電気信号に変換され、送受波結合回
路２を通して入力トランス４に送られる。 A reflected wave from an object to be detected underwater is received by a transducer 1, converted into an electrical signal, and sent to an input transformer 4 through a transducer/receiver coupling circuit 2.
入力トランス４の二次側コイル５には、並列に
同調蓄電器６が接続されており、受信信号周波数
の共振回路が形成されている。 A tuned capacitor 6 is connected in parallel to the secondary coil 5 of the input transformer 4, forming a resonant circuit for the received signal frequency.
７はダイオードであり、上記の共振回路の出力
信号を検波し、この検波出力によつて、８の蓄電
器を充電する。 A diode 7 detects the output signal of the above-mentioned resonant circuit and charges the capacitor 8 with the detected output.
蓄電器８の充電された電荷は、ダイオード１
０・抵抗９・上記の共振回路の順路を通して放電
されることになる。 The charged electric charge of the capacitor 8 is transferred to the diode 1
0.Resistor 9.It will be discharged through the above-mentioned resonant circuit path.
ダイオード１０のインピーダンスは放電電流の
大小によつて変化し、数十オームからほぼ無限大
まで変わるので、この変化に従つて、二次側コイ
ル５と同調蓄電器６とで形成された共振回路の共
振インピーダンスも、同様に変化させられ、数十
オームから無限大（実質的には次段増幅回路１１
の入力インピーダンスの値）まで変化する。 The impedance of the diode 10 changes depending on the magnitude of the discharge current, ranging from several tens of ohms to almost infinity. According to this change, the resonance of the resonant circuit formed by the secondary coil 5 and the tuned capacitor 6 The impedance is also changed in the same way, from several tens of ohms to infinity (substantially the next stage amplifier circuit 11
input impedance value).
したがつて、入力トランス４の利得は、ダイオ
ード１０の放電電流の変化に応じて、変化させら
れていることになる。 Therefore, the gain of the input transformer 4 is changed according to the change in the discharge current of the diode 10.
１１は必要な利得を得るための増幅回路で入力
インピーダンスが高く構成されている。 Reference numeral 11 is an amplifier circuit for obtaining the necessary gain, and is configured to have a high input impedance.
また、１２は増幅回路１１の出力端子で、この
端子より得られる出力を記録信号として用いる。 Further, 12 is an output terminal of the amplifier circuit 11, and the output obtained from this terminal is used as a recording signal.
本考案は、以上のように、蓄電器８と第１のダ
イオード７とを直列に接続した充電回路を受信・
増幅のための入力回路に設けた共振回路５，６に
並列に付加して、共振回路５，６の出力信号を整
流して充電するための充電回路を形成する充電手
段を設けるとともに、電流の変化によつてインピ
ーダンスの変化する第２のダイオード１０と抵抗
９とを直列に接続した放電回路を、その第２のダ
イオード１０の極性を第１のダイオード９の極性
と逆極性に配置して、第１のダイオード７に並列
に付加して、充電回路７，８の充電された電荷を
共振回路５，６のコイル５を介して放電するため
の放電回路を形成する放電手段を設けたものであ
る。 As described above, the present invention uses a charging circuit in which the capacitor 8 and the first diode 7 are connected in series.
A charging means is provided in parallel to the resonance circuits 5 and 6 provided in the input circuit for amplification to form a charging circuit for rectifying and charging the output signals of the resonance circuits 5 and 6. A discharge circuit in which a second diode 10 whose impedance changes with change and a resistor 9 are connected in series is arranged so that the polarity of the second diode 10 is opposite to that of the first diode 9, A discharging means is provided in parallel with the first diode 7 to form a discharging circuit for discharging the charges charged in the charging circuits 7 and 8 via the coils 5 of the resonant circuits 5 and 6. be.
このため、大きい受信信号がくると、その大き
さと長さに従つて充電回路７，８が充電され、そ
して、受信信号が小さくなる残響部分では、この
充電が放電回路９，１０によつて放電され、この
放電電流が時間経過的に減少してゆくように変化
するため、第２のダイオード１０のインピーダン
スが時間経過的に増加するよう変化する。 Therefore, when a large received signal comes, the charging circuits 7 and 8 are charged according to its magnitude and length, and in the reverberation part where the received signal becomes small, this charge is discharged by the discharge circuits 9 and 10. Since this discharge current changes to decrease over time, the impedance of the second diode 10 changes to increase over time.
このため、受信信号中に存在する残響を受信信
号の大きさと長さに応じて時間的変化に抑圧し得
ることになる。 Therefore, the reverberation present in the received signal can be suppressed over time depending on the magnitude and length of the received signal.
この考案によれば、受信・増幅のための入力回
路に設けた共振回路に、ダイオードと蓄電器の直
列接続による充電回路と、ダイオードと抵抗の直
列接続による放電回路とのごく簡単安価な構成を
付加するだけで、上記のような優れた残響抑圧作
用をもつ水中探知装置を提供することができるな
どの特長がある。
According to this invention, a very simple and inexpensive configuration is added to the resonant circuit provided in the input circuit for reception and amplification: a charging circuit with a series connection of a diode and a capacitor, and a discharge circuit with a series connection of a diode and a resistor. It has the advantage that it is possible to provide an underwater detection device with the above-mentioned excellent dereverberation effect simply by doing the following.
図面は実施例を示し、第１図は要部の回路構成
図である。
１……送受波器、２……送受結合回路、３……
送信信号発生回路、４……入力トランス、５……
入力トランス二次コイル、６……同調蓄電器、７
……ダイオード、８……蓄電器、９……抵抗、１
０……ダイオード、１１……増幅回路、１２……
出力端子。
The drawings show an embodiment, and FIG. 1 is a circuit configuration diagram of the main part. 1... Transducer/receiver, 2... Transmitting/receiving coupling circuit, 3...
Transmission signal generation circuit, 4... Input transformer, 5...
Input transformer secondary coil, 6... Tuning capacitor, 7
... Diode, 8 ... Capacitor, 9 ... Resistor, 1
0...Diode, 11...Amplification circuit, 12...
Output terminal.
Claims (1)
射波を受信・増幅して被探知物の探知信号を得
るようにした水中探知装置であつて、 ａ 蓄電器と第１のダイオードとの直列接続回
路を、前記受信・増幅のための入力回路に設
けた共振回路に並列に付加することにより、
前記共振回路の出力信号を整流して充電する
ための充電回路を形成する充電手段と、 ｂ 電流の変化によつてインピーダンスの変化
する第２のダイオードと抵抗との直列接続回
路を、前記第２のダイオードの極性を前記第
１のダイオードの極性と逆極性に配置して、
前記第１のダイオードに並列に付加すること
により、前記充電回路の充電された電荷を前
記共振回路を介して放電するための放電回路
を形成する放電手段と を具備することにより前記出力信号中に存在する
残響を抑圧し得るようにしたことを特徴とする装
置。 ２ 実用新案登録請求範囲第１項記載の装置であ
つて、 ａ 前記発射と前記反射波の受波のための送受
波器に接続された送受結合回路により入力さ
れる入力トランスの二次側コイルに並列に同
調蓄電器を接続して形成した前記共振回路の
前記二次側コイルの両端に直接、前記蓄電器
と第１のダイオードとの直列接続回路を、並
列に接続して形成した前記充電回路と、 ｂ 前記第１のダイオードの両端に直接、前記
抵抗と前記第２のダイオードとの直列接続回
路を、並列に接続して形成した前記放電回路
と を具備することを特徴とする装置。[Scope of Claim for Utility Model Registration] 1. An underwater detection device that receives and amplifies the reflected waves obtained by emitting ultrasonic pulse waves into the water to obtain a detection signal for an object to be detected, which includes: a) an electric storage device; By adding a series connection circuit with the first diode in parallel to the resonant circuit provided in the input circuit for reception and amplification,
a charging means forming a charging circuit for rectifying and charging the output signal of the resonant circuit; b. a series connection circuit of a second diode and a resistor whose impedance changes with changes in current; The polarity of the diode is arranged to be opposite to the polarity of the first diode,
and a discharging means that is added in parallel to the first diode to form a discharging circuit for discharging the charged charge of the charging circuit via the resonant circuit. A device characterized by being able to suppress existing reverberations. 2. The device according to claim 1 of the utility model registration, comprising: a. A secondary coil of an input transformer inputted by a transmitting/receiving coupling circuit connected to a transducer for emitting and receiving the reflected waves; and the charging circuit formed by connecting a series connection circuit of the capacitor and a first diode in parallel directly to both ends of the secondary coil of the resonant circuit formed by connecting a tuned capacitor in parallel to the resonant circuit. , b. A device characterized in that the discharge circuit is formed by connecting a series connection circuit of the resistor and the second diode in parallel directly to both ends of the first diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12110782U JPS5964583U (en) | 1982-08-11 | 1982-08-11 | underwater detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12110782U JPS5964583U (en) | 1982-08-11 | 1982-08-11 | underwater detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5964583U JPS5964583U (en) | 1984-04-28 |
| JPH0138541Y2 true JPH0138541Y2 (en) | 1989-11-17 |
Family
ID=30277305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12110782U Granted JPS5964583U (en) | 1982-08-11 | 1982-08-11 | underwater detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5964583U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6134487A (en) * | 1984-07-26 | 1986-02-18 | Omron Tateisi Electronics Co | Ultrasonic detector |
| TWI443963B (en) * | 2010-09-17 | 2014-07-01 | Tung Thih Electronic Co Ltd | And a control device capable of suppressing the residual vibration of a piezoelectric element |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491365A (en) * | 1977-12-14 | 1979-07-19 | Danfoss As | Transmission*reception separator |
| JPS5555422U (en) * | 1978-10-11 | 1980-04-15 | ||
| JPS5699872U (en) * | 1979-12-26 | 1981-08-06 |
-
1982
- 1982-08-11 JP JP12110782U patent/JPS5964583U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5491365A (en) * | 1977-12-14 | 1979-07-19 | Danfoss As | Transmission*reception separator |
| JPS5555422U (en) * | 1978-10-11 | 1980-04-15 | ||
| JPS5699872U (en) * | 1979-12-26 | 1981-08-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5964583U (en) | 1984-04-28 |
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