JP2734279B2 - Transmitter for sonar - Google Patents
Transmitter for sonarInfo
- Publication number
- JP2734279B2 JP2734279B2 JP4059009A JP5900992A JP2734279B2 JP 2734279 B2 JP2734279 B2 JP 2734279B2 JP 4059009 A JP4059009 A JP 4059009A JP 5900992 A JP5900992 A JP 5900992A JP 2734279 B2 JP2734279 B2 JP 2734279B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- output
- circuit
- supply voltage
- transmission power
- 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 - Lifetime
Links
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【０００１】[0001]
【技術分野】本発明はソーナー用送信装置に関し、特に
水中に音響パルスを送波して目標からの反射エコーを受
信することによって目標を検出するようにしたソーナー
用送信装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting device for a sonar, and more particularly to a transmitting device for a sonar that transmits an acoustic pulse into water and receives a reflected echo from the target to detect the target.
【０００２】[0002]
【従来技術】従来のこの種の送信装置は、図２に示す様
に、発振回路１と、パルス変調回路３と、電力増幅器４
と、送波器５と、タイミング制御回路６と、送信用電源
７とから構成されている。2. Description of the Related Art As shown in FIG. 2, a conventional transmitting apparatus of this type includes an oscillating circuit 1, a pulse modulating circuit 3, and a power amplifier 4.
, A transmitter 5, a timing control circuit 6, and a transmission power supply 7.
【０００３】発振回路１の出力信号１１はパルス変調回
路３で所定のパルス幅及び周期のトーンバースト信号３
１にパルス変調され、電力増幅器４にて所定電力となる
まで増幅され、送波器５に供給される。この送波器５に
より、水中へ音響パルス信号５１が放射される。タイミ
ング制御回路６はパルス変調回路３にパルス変調信号６
１を供給して所定のパルス幅及び周期の信号を生成する
ためのものである。送信用電源回路７は電力増幅器４に
動作電源電圧７１を供給する。The output signal 11 of the oscillation circuit 1 is converted by a pulse modulation circuit 3 into a tone burst signal 3 having a predetermined pulse width and period.
The signal is pulse-modulated to 1, amplified by the power amplifier 4 until the power reaches a predetermined level, and supplied to the transmitter 5. This transmitter 5 emits an acoustic pulse signal 51 into the water. The timing control circuit 6 supplies a pulse modulation signal 6 to the pulse modulation circuit 3.
1 to generate a signal having a predetermined pulse width and period. The transmission power supply circuit 7 supplies an operation power supply voltage 71 to the power amplifier 4.
【０００４】一般に、ソーナー用送信装置では、電力増
幅器の効率を高くするため、電力増幅器４の出力が無歪
最大出力電圧になる様に電力増幅器４の利得及び入力信
号３１の振幅を決定している。この無歪最大出力電圧は
送信用電源電圧に依存するものであるため、蓄電池また
はコンデンサ充放電型の電源の様に電源電圧が変動する
場合は、送信用電源電圧の最低値で決定する必要があ
り、このために送信用電源電圧が最低値以上に有る時、
効率が低下する問題がある。In general, in a sonar transmitter, the gain of the power amplifier 4 and the amplitude of the input signal 31 are determined so that the output of the power amplifier 4 becomes the distortion-free maximum output voltage in order to increase the efficiency of the power amplifier. I have. Since the maximum distortion-free output voltage depends on the power supply voltage for transmission, when the power supply voltage fluctuates as in the case of a storage battery or a capacitor charging / discharging type power supply, it is necessary to determine the minimum value of the power supply voltage for transmission. Yes, and when the power supply voltage for transmission is above the minimum value,
There is a problem that efficiency is reduced.
【０００５】これを改善するために、送信用電源電圧が
最低値以上の点で無歪最大出力になる様に振幅を決める
と、送信用電源電圧が低下した時、電力増幅器が飽和し
てしまい波形歪が発生するという問題がある。In order to improve this, if the amplitude is determined so that the transmission power supply voltage becomes the maximum output without distortion at a point equal to or higher than the minimum value, the power amplifier is saturated when the transmission power supply voltage drops. There is a problem that waveform distortion occurs.
【０００６】[0006]
【発明の目的】そこで、本発明はかかる従来技術の欠点
を解決すべくなされたものであって、その目とするとこ
ろは、送信用電源電圧の変動に対して常に無歪最大出力
を送信できるようにしたアクティブソーナー用送信装置
を提供することにある。SUMMARY OF THE INVENTION Therefore, the present invention has been made to solve the above-mentioned drawbacks of the prior art, and the main point is that the distortion-free maximum output can always be transmitted with respect to the fluctuation of the transmission power supply voltage. It is another object of the present invention to provide an active sonar transmission device.
【０００７】[0007]
【発明の構成】本発明によれば、水中に音響パルスを送
波して目標からの反射エコーを受信し、目標を検出する
ソーナー用送信装置であって、発振回路と、送信用電源
と、この送信用電源電圧に応じて前記発振回路の出力電
圧を制御する振幅制御回路と、前記振幅制御回路の出力
にパルス変調するパルス変調回路と、前記送信用電源電
圧により動作してパルス変調出力を増幅する電力増幅器
と、この増幅出力を音響信号に変換して水中に送波する
送波器とを含むことを特徴とするソーナー用送信装置が
得られる。According to the present invention, there is provided a sonar transmitter for transmitting an acoustic pulse into water, receiving a reflected echo from a target, and detecting the target, comprising: an oscillating circuit; a transmission power supply; An amplitude control circuit that controls an output voltage of the oscillation circuit according to the transmission power supply voltage; a pulse modulation circuit that performs pulse modulation on an output of the amplitude control circuit; and a pulse modulation output that operates by the transmission power supply voltage. A sonar transmitting device including a power amplifier for amplifying and a transmitter for converting the amplified output into an acoustic signal and transmitting the acoustic signal into water is obtained.
【０００８】[0008]
【実施例】次に、本発明の実施例について図面を用いて
説明する。Next, embodiments of the present invention will be described with reference to the drawings.
【０００９】図１は本発明の実施例のブロック図であ
り、図２と同等部分は同一符号により示している。図２
の構成と異なる部分は、発振回路１とパルス変調回路３
との間に振幅制御回路２を付加し、この振幅制御回路２
により、送信用電源回路７の電源電圧に応じて発振回路
１の出力信号１１の電圧Ｅs を制御するようにしている
点である。他の構成は図２のそれと同一であり、よって
その説明は省略する。FIG. 1 is a block diagram of an embodiment of the present invention, and the same parts as those in FIG. 2 are denoted by the same reference numerals. FIG.
The difference from the configuration of the first embodiment is that the oscillation circuit 1 and the pulse modulation circuit 3
And an amplitude control circuit 2 is added between
Thus, the voltage Es of the output signal 11 of the oscillation circuit 1 is controlled in accordance with the power supply voltage of the transmission power supply circuit 7. The other configuration is the same as that of FIG. 2, and the description thereof will be omitted.
【００１０】発振制御回路２には発振回路１の出力信号
１１（Ｅs)が加えられ、振幅制御された信号２１（Ｅa
）が出力される。ここで、送信用電源電圧をＥb と
し、ｋ1，ｋ2 を定数とすると、振幅制御回路２の出力
電圧Ｅa は、 Ｅa ＝（ｋ1 ・Ｅb −ｋ2 ）Ｅs …（１） となる。The output signal 11 (Es) of the oscillation circuit 1 is applied to the oscillation control circuit 2, and the amplitude-controlled signal 21 (Ea) is applied.
) Is output. Here, assuming that the transmission power supply voltage is Eb and k1 and k2 are constants, the output voltage Ea of the amplitude control circuit 2 is Ea = (k1 · Eb−k2) Es (1)
【００１１】この電圧Ｅa はパルス変調回路３にて所定
のパルス幅と周期を有するトーンバースト信号３１（Ｅ
i ）に変調され、電力増幅器４に加えられる。この電力
増幅器４では、所定の振幅となる様に増幅されて出力４
１（Ｅo ）が生成され、送波器５にて音響パルス信号５
１に変換されて水中へ放射される。The voltage Ea is applied to a tone burst signal 31 (E) having a predetermined pulse width and period by the pulse modulation circuit 3.
i) and applied to the power amplifier 4. The power amplifier 4 amplifies the output to a predetermined amplitude and outputs
1 (Eo) is generated, and the acoustic pulse signal 5
It is converted to 1 and emitted into water.
【００１２】ここで、電力増幅器４の無歪最大出力電圧
（Ｅomax）は送信用電源電圧Ｅb に比例し、 Ｅomax＝（ｋ3 ・Ｅb −ｋ4 ） ……（２） と表わされる。尚、Ｋ3 ，Ｋ4 は回路固有の定数であ
る。Here, the distortion-free maximum output voltage (Eomax) of the power amplifier 4 is proportional to the transmission power supply voltage Eb, and is expressed as Eomax = (k3.Eb-k4) (2). K3 and K4 are circuit-specific constants.
【００１３】また、無歪時の出力電圧Ｅo は、 Ｅo ＝Ａ・Ｅi ＝Ａ・Ｅa ＝Ａ・Ｅs （ｋ1 ・Ｅb −ｋ2 ）……（３） と表わすことができる。尚、Ａは電力増幅器４の利得で
ある。The output voltage Eo at the time of no distortion can be expressed as follows: Eo = A.Ei = A.Ea = A.Es (k1.Eb-k2) (3) A is the gain of the power amplifier 4.
【００１４】いま、一例としてＡ＝１０倍，Ｅs ＝１０
Ｖとし、また送信用電源電圧Ｅb と無歪最大出力Ｅomax
とが、 Ｅb ＝１００Ｖ，９０Ｖ，８０Ｖ Ｅomax＝ ９０Ｖ，８０Ｖ，７０Ｖ である場合、（１）式の定数を夫々ｋ1 ＝０．０１，ｋ
2 ＝０．１と設定することで、（３）式から送信用電源
電圧Ｅb と電力増幅器４の出力電圧Ｅo とは、 Ｅb ＝１００Ｖ，９０Ｖ，８０Ｖ Ｅo ＝ ９０Ｖ，８０Ｖ，７０Ｖ となる。Now, as an example, A = 10 times and Es = 10
V, the transmission power supply voltage Eb and the distortion-free maximum output Eomax
Is Eb = 100V, 90V, 80V Eomax = 90V, 80V, 70V When the constants of the equation (1) are respectively k1 = 0.01, k1
By setting 2 = 0.1, from the equation (3), the transmission power supply voltage Eb and the output voltage Eo of the power amplifier 4 are Eb = 100V, 90V, 80V Eo = 90V, 80V, 70V.
【００１５】すなわち、送信用電源電圧Ｅb が変動して
も、出力電圧Ｅo は無歪最大出力Ｅomaxを越えることが
ないことが判る。That is, even if the transmission power supply voltage Eb fluctuates, the output voltage Eo does not exceed the distortion-free maximum output Emax.
【００１６】[0016]
【発明の効果】以上述べた如く、本発明によれば、送信
用電源電圧に比例する様に電力増幅器の入力を制御する
ことにより、送信用電源電圧の変動に対して常に無歪最
大出力が得られるという効果がある。As described above, according to the present invention, by controlling the input of the power amplifier so as to be proportional to the transmission power supply voltage, the distortion-free maximum output is always maintained with respect to the fluctuation of the transmission power supply voltage. There is an effect that it can be obtained.
【図１】本発明の実施例の回路ブロック図である。FIG. 1 is a circuit block diagram of an embodiment of the present invention.
【図２】従来のソーナー用送信装置の回路ブロック図で
ある。FIG. 2 is a circuit block diagram of a conventional sonar transmission device.
１ 発振回路 ２ 振幅制御回路 ３ パルス変調回路 ４ 電力増幅器 ５ 送波器 ６ タイミング制御回路 ７ 送信用電源回路 DESCRIPTION OF SYMBOLS 1 Oscillation circuit 2 Amplitude control circuit 3 Pulse modulation circuit 4 Power amplifier 5 Transmitter 6 Timing control circuit 7 Transmission power supply circuit
Claims (1)
反射エコーを受信し、目標を検出するソーナー用送信装
置であって、発振回路と、送信用電源と、この送信用電
源電圧に応じて前記発振回路の出力電圧を制御する振幅
制御回路と、前記振幅制御回路の出力にパルス変調する
パルス変調回路と、前記送信用電源電圧により動作して
パルス変調出力を増幅する電力増幅器と、この増幅出力
を音響信号に変換して水中に送波する送波器とを含むこ
とを特徴とするソーナー用送信装置。1. A sonar transmission device for transmitting an acoustic pulse into water to receive a reflected echo from a target and detect the target, comprising: an oscillation circuit, a transmission power supply, and a transmission power supply voltage. An amplitude control circuit that controls an output voltage of the oscillation circuit in response thereto, a pulse modulation circuit that performs pulse modulation on an output of the amplitude control circuit, a power amplifier that operates with the transmission power supply voltage and amplifies a pulse modulation output, A transmitter for converting the amplified output into an acoustic signal and transmitting the signal underwater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4059009A JP2734279B2 (en) | 1992-02-12 | 1992-02-12 | Transmitter for sonar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4059009A JP2734279B2 (en) | 1992-02-12 | 1992-02-12 | Transmitter for sonar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05223926A JPH05223926A (en) | 1993-09-03 |
| JP2734279B2 true JP2734279B2 (en) | 1998-03-30 |
Family
ID=13100867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4059009A Expired - Lifetime JP2734279B2 (en) | 1992-02-12 | 1992-02-12 | Transmitter for sonar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2734279B2 (en) |
-
1992
- 1992-02-12 JP JP4059009A patent/JP2734279B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05223926A (en) | 1993-09-03 |
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