JPH0733186Y2 - Ultrasonic transceiver - Google Patents
Ultrasonic transceiverInfo
- Publication number
- JPH0733186Y2 JPH0733186Y2 JP1987097015U JP9701587U JPH0733186Y2 JP H0733186 Y2 JPH0733186 Y2 JP H0733186Y2 JP 1987097015 U JP1987097015 U JP 1987097015U JP 9701587 U JP9701587 U JP 9701587U JP H0733186 Y2 JPH0733186 Y2 JP H0733186Y2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- receiver
- transmitter
- mixer
- 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
【考案の詳細な説明】 （産業上の利用分野） この考案は、超音波パルスを送波し、物標からの帰来反
射波を受波する探知装置において、特に２周波以上の周
波数を切換えて送受波する超音波送受信装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a detecting device that transmits an ultrasonic pulse and receives a return reflection wave from a target, particularly by switching frequencies of two or more frequencies. The present invention relates to an ultrasonic wave transmitting / receiving device.
（従来の技術） 近年、魚種判別や多方向探知の目的で複数種類の周波数
を利用する水中探知装置が用いられている。(Prior Art) In recent years, underwater detection apparatuses that use a plurality of types of frequencies have been used for the purpose of fish species discrimination and multi-directional detection.
この種の装置は、送受波器からトラップ部、混合部を経
て増幅検波部まで各々並列して設けられ、該検波後に１
ラインに結合されて直接又はＡ−Ｄ変換後一旦記憶され
て表示器へ導かれるようになされている。This type of device is provided in parallel from a transmitter / receiver to a trap section, a mixing section, and an amplification detection section.
It is adapted to be connected to a line and stored directly after A / D conversion or to be guided to a display.
参考資料（特開昭55−78266号、60−235077号） （考案が解決しようとする問題点） しかしながら、上記装置では各回路が並列して設けられ
るため回路点数が多くなり、高価及び大型化を招く。Reference materials (Japanese Patent Laid-Open Nos. 55-78266 and 60-235077) (Problems to be solved by the device) However, in the above-mentioned device, since each circuit is provided in parallel, the number of circuits increases, resulting in increase in cost and size. Invite.
（問題点を解決するための手段） この考案は、送信トランスのｎ個の２次側巻線にそれぞ
れ接続され互いに異なる周波数信号を送受信するｎ個の
送受波器と、 該ｎ個の送受波器にそれぞれ接続され、対応する送受波
器が受信した信号周波数に共振するLC回路を有するｎ個
の受信回路と、 該ｎ個の受信回路に共通に接続される１つの混合器と、 送信周波数の選択に連動して送信周波数より一定周波数
だけ高い（低い）局発周波信号を上記混合器に送入する
局発と、 上記混合器出力から差または和周波の一方の信号を抽出
するフィルターとから成ることを特徴とする。(Means for Solving Problems) The present invention relates to n transducers connected to n secondary windings of a transmission transformer and transmitting and receiving mutually different frequency signals, and the n transducers. Receiver circuits each having an LC circuit resonating with the signal frequency received by the corresponding transmitter / receiver, one mixer commonly connected to the n receiver circuits, and a transmission frequency A local oscillator that feeds a local frequency signal higher (or lower) than the transmission frequency by a certain frequency to the mixer in conjunction with the selection of, and a filter that extracts a difference or sum frequency signal from the mixer output. It is characterized by consisting of.
（作用） この考案によれば、送受信部が複数列、例えば高周波の
送信周波数fHと低周波の送信周波数fLの２列が設けてあ
り、これを適宜切換えて送受信がなされる。従って、混
合部へ高、低周波数の両受信信号が入力されるので混合
処理のための局発周波信号は送信周波数の切換に連動し
て切換えられ、これにより混合部から常に一定の周波信
号が送出される。(Operation) According to the present invention, the transmission / reception unit is provided with a plurality of rows, for example, two rows of the high frequency transmission frequency f H and the low frequency transmission frequency f L , and transmission and reception are performed by appropriately switching these. Therefore, since both the high and low frequency received signals are input to the mixing section, the local frequency signal for the mixing process is switched in conjunction with the switching of the transmission frequency, whereby a constant frequency signal is always output from the mixing section. Sent out.
（実施例） 第１図は、送受信回路部と混合部とから成る送受信装置
の回路図の一例を示すもので、第２図は高、低両送受波
器の励振特性である周波数−インピーダンス（ｆ−Ｚ）
曲線、第３図は信号波形図である。(Embodiment) FIG. 1 shows an example of a circuit diagram of a transmitter / receiver comprising a transmitter / receiver circuit section and a mixing section, and FIG. 2 shows frequency-impedance (excitation characteristics of both high and low transducers). f-Z)
The curve and FIG. 3 are signal waveform diagrams.
第１図において、１〜６は同一ダイオードが互いに逆方
向に並列接続され、送信時の電力により短絡され、一方
受信時の微弱信号に対しては開放される双方向ダイオー
ドである。T1〜T3はトランスで、T1の１次側には第３図
ａに示すような高、低周波数の変調信号を交互に発生す
るための送信電力供給源（図示せず）が設けてある。In FIG. 1, reference numerals 1 to 6 are bidirectional diodes in which the same diodes are connected in parallel in opposite directions and short-circuited by electric power at the time of transmission, while open to a weak signal at the time of reception. T 1 to T 3 are transformers, and a primary side of T 1 is provided with a transmission power supply source (not shown) for alternately generating high and low frequency modulated signals as shown in FIG. 3a. There is.
Z1、Z2は超音波パルスを送受波する送受波器で、Z1は高
周波fH用、Z2は低周波fL用である。Z1のｆ−Ｚ特性は第
２図のように周波数fHのとき抵抗分のみとなって最大効
率で駆動されるようになされており、またZ2は周波数fL
のとき最大効率で駆動される。Z 1 and Z 2 are transducers for transmitting and receiving ultrasonic pulses, Z 1 is for high frequency f H , and Z 2 is for low frequency f L. F-Z characteristic of Z 1 are adapted to be driven at the maximum efficiency becomes only the resistance component at the frequency f H as the second view, also Z 2 is a frequency f L
When it is driven with maximum efficiency.
CH、CLはコンデンサーで、トラップ機能及び受信信号が
トランスT2、T3で効率よく伝送される点を考慮して後述
のようにその容量が設定されている。C H and C L are capacitors, and their capacities are set as described later in consideration of the trap function and the fact that the received signal is efficiently transmitted by the transformers T 2 and T 3 .
７は混合器、８は局発、９はフィルターである。上記局
発８は送信周波数を切換える制御信号Ｓにより、例えば
本実施例のように２種類の局発周波数が交互に送出され
る（第３図ｂ）ようになされている。7 is a mixer, 8 is a local oscillator, and 9 is a filter. The local oscillator 8 is configured so that, by a control signal S for switching the transmission frequency, for example, two types of local oscillator frequencies are alternately transmitted as in this embodiment (FIG. 3b).
今、送受波器Z1の周波数fHでのインピーダンスをZHと、
送受波器Z2の周波数fLでのインピーダンスをZLとし、ト
ランスT2、T3の１次コイルのインダクダンスをLH，LLと
するとき、このインダクタンスLH、LL及びコンデンサ
CH，CLの値は次のようにして予め設定される。Now, let Z H be the impedance at the frequency f H of the transducer Z 1 .
When the impedance of the transmitter / receiver Z 2 at the frequency f L is Z L and the inductance of the primary coils of the transformers T 2 and T 3 are L H and L L , the inductances L H and L L and the capacitor
The values of C H and C L are preset as follows.
すなわち、送信時における送受波器のインピーダンスは ZH、ZL ……（１） 受信側のインピーダンスは双方向ダイオード５、６が短
絡状態にあることから、 となる。That is, the impedance of the transducer at the time of transmission is Z H , Z L (1) The impedance at the receiving side is that the bidirectional diodes 5 and 6 are in the short-circuited state, Becomes
そして、送信のための供給電力が送受波器で送波エネル
ギーとして消費されるためには上記（２）のインピーダ
ンスの方が（１）のインピーダンスに比してかなり大き
くなるように、CH、CLの値が決定される。Then, in order that the supply power for transmission is consumed as the transmission energy by the wave transmitter / receiver, C H is set so that the impedance of (2) becomes considerably larger than the impedance of (1). the value of C L is determined.
この場合、第２図の特性曲線からも分かるように周波数
fHでは送受波器Z1のみが共振して送波エネルギーを消費
し、逆に周波数fLでは送受波器Z2のみが共振して送波エ
ネルギーを消費する。In this case, as can be seen from the characteristic curve in Fig. 2, the frequency
At f H , only the transducer Z 1 resonates and consumes transmitted energy, and conversely, at the frequency f L , only transducer Z 2 resonates and consumes transmitted energy.
一方、受信時においては受信信号がトランスT2、T3を効
率よく通過するために、 が成り立つようなLH、LCが決定される。On the other hand, at the time of reception, in order for the received signal to pass through the transformers T 2 and T 3 efficiently, L H and L C are determined such that
さて、送受波器Z1で周波数fHにて送受信がなされたとす
ると、該受信信号はトランスT2を経て混合器７に導かれ
る。このとき、局発８は局発周波数fH＋fOを出力し、従
って混合出力として差周波fOもしくは和周波2fH＋fOが
得られる。そして、フィルター９により一方の、例えば
差周波fOの信号のみ抽出される。Now, assuming that transmission / reception is performed at the frequency f H by the transmitter / receiver Z 1 , the received signal is guided to the mixer 7 via the transformer T 2 . At this time, the local oscillator 8 outputs the local oscillator frequency f H + f O , and therefore the difference frequency f O or the sum frequency 2f H + f O is obtained as a mixed output. Then, the filter 9 extracts only one of the signals having the difference frequency f O , for example.
次に、送受波器Z2で周波数fLにて送受信がなされた場合
は、該受信信号はトランスT3を経て、混合器７に導かれ
る。このとき、局発８は制御信号Ｓによって局発周波数
fL＋fOを出力する。従って、混合出力として差周波fOも
しくは和周波2fL＋fOが得られる。そして、前記同様フ
ィルター９により差周波fOの信号のみ抽出される。Next, when the transmitter / receiver Z 2 transmits and receives at the frequency f L , the received signal is guided to the mixer 7 through the transformer T 3 . At this time, the local oscillator 8 generates a local oscillator frequency by the control signal S.
Output f L + f O. Therefore, the difference frequency f O or the sum frequency 2f L + f O is obtained as the mixed output. Then, similarly to the above, only the signal of the difference frequency f O is extracted by the filter 9.
なお、局発出力は、fH−fO、fL−fOの周波数でもよい。The local output may be frequencies f H −f O and f L −f O.
このようにして高、低両周波数信号は常にフィルター出
力として一定周波数に変調されて、１ラインの次段増幅
検波後表示器（図示せず）に導かれる。In this way, both high and low frequency signals are always modulated as a filter output to a constant frequency and guided to a one-line post-stage amplification / detection display (not shown).
（考案の効果） 以上説明したように、この考案によれば、複数の周波数
を双方向ダイオードによる開放、短絡動作と送受波器、
トランス、コンデンサーのインピーダンス特性を利用し
てトラップ機能を持たせたと共に該複数の異なった送受
波器を組み合わせても、送受信回路を１ライン化したの
で回路構成を簡素化できる。(Effect of the Invention) As described above, according to the present invention, a plurality of frequencies are opened and shorted by a bidirectional diode, and a transceiver is provided.
Even if a plurality of different wave transmitters / receivers are combined with a trap function utilizing the impedance characteristics of the transformer and the condenser, the circuit configuration can be simplified because the transmission / reception circuit is integrated into one line.
第１図はこの考案の一実施例を示す回路図である。第２
図は送受波器の周波数−インピータンス特性曲線であ
る。第３図は信号波形図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention. Second
The figure is the frequency-impedance characteristic curve of the transducer. FIG. 3 is a signal waveform diagram.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 森 源次 兵庫県西宮市芦原町９番52号 古野電気株 式会社内 (72)考案者 浜戸 宏幸 兵庫県西宮市芦原町９番52号 古野電気株 式会社内 (72)考案者 下嶋 康弘 兵庫県西宮市芦原町９番52号 古野電気株 式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Genji Mori, 9-52 Ashihara-cho, Nishinomiya-shi, Hyogo Inside Furuno Electric Co., Ltd. (72) Hiroyuki Hamado 9-52, Ashihara-cho, Nishinomiya-shi, Hyogo Furuno Inside the Electric Stock Company (72) Creator Yasuhiro Shimojima 9-52 Ashihara-cho, Nishinomiya-shi, Hyogo Inside Furuno Electric Co., Ltd.
Claims (1)
れ接続され互いに異なる周波数信号を送受信するｎ個の
送受波器と、 該ｎ個の送受波器にそれぞれ接続され、対応する送受波
器が受信した信号周波数に共振するLC回路を有するｎ個
の受信回路と、 該ｎ個の受信回路に共通に接続される１つの混合器と、 送信周波数の選択に連動して送信周波数より一定周波数
だけ高い（低い）局発周波信号を上記混合器に送入する
局発と、 上記混合器出力から差または和周波の一方の信号を抽出
するフィルターとから成る超音波送受信装置。1. N transducers connected to n secondary windings of a transmission transformer for transmitting and receiving mutually different frequency signals, and corresponding transducers respectively connected to the n transducers. N receiver circuits having LC circuits that resonate with the signal frequency received by the wave filter, one mixer commonly connected to the n receiver circuits, and the transmitter frequency linked to the selection of the transmitter frequency. An ultrasonic transmitter / receiver comprising a local oscillator that feeds a local oscillator signal having a high (low) frequency of a certain frequency to the mixer, and a filter that extracts a difference or sum frequency signal from the mixer output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987097015U JPH0733186Y2 (en) | 1987-06-23 | 1987-06-23 | Ultrasonic transceiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987097015U JPH0733186Y2 (en) | 1987-06-23 | 1987-06-23 | Ultrasonic transceiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS642188U JPS642188U (en) | 1989-01-09 |
| JPH0733186Y2 true JPH0733186Y2 (en) | 1995-07-31 |
Family
ID=30963488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987097015U Expired - Lifetime JPH0733186Y2 (en) | 1987-06-23 | 1987-06-23 | Ultrasonic transceiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0733186Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002210408A (en) * | 2001-01-17 | 2002-07-30 | Furuno Electric Co Ltd | Device for driving ultrasonic vibrator transducer and underwater detecting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561585A (en) * | 1979-06-18 | 1981-01-09 | Matsushita Electric Ind Co Ltd | Piezoelectric porcelain composition |
| JPS57206869A (en) * | 1981-06-15 | 1982-12-18 | Koden Electronics Co Ltd | Transmitting device for ultrasonic pulse |
| JPS58202880A (en) * | 1982-05-20 | 1983-11-26 | Mitsubishi Electric Corp | Pulse radar apparatus |
| JPS5975172A (en) * | 1982-10-23 | 1984-04-27 | Japan Radio Co Ltd | Transmitter and receiver driving circuit of sonnar |
| JPS61165677A (en) * | 1985-01-17 | 1986-07-26 | Mitsubishi Electric Corp | Pulse radar apparatus |
-
1987
- 1987-06-23 JP JP1987097015U patent/JPH0733186Y2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS561585A (en) * | 1979-06-18 | 1981-01-09 | Matsushita Electric Ind Co Ltd | Piezoelectric porcelain composition |
| JPS57206869A (en) * | 1981-06-15 | 1982-12-18 | Koden Electronics Co Ltd | Transmitting device for ultrasonic pulse |
| JPS58202880A (en) * | 1982-05-20 | 1983-11-26 | Mitsubishi Electric Corp | Pulse radar apparatus |
| JPS5975172A (en) * | 1982-10-23 | 1984-04-27 | Japan Radio Co Ltd | Transmitter and receiver driving circuit of sonnar |
| JPS61165677A (en) * | 1985-01-17 | 1986-07-26 | Mitsubishi Electric Corp | Pulse radar apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS642188U (en) | 1989-01-09 |
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