JPH0525076B2 - - Google Patents
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- Publication number
- JPH0525076B2 JPH0525076B2 JP9416586A JP9416586A JPH0525076B2 JP H0525076 B2 JPH0525076 B2 JP H0525076B2 JP 9416586 A JP9416586 A JP 9416586A JP 9416586 A JP9416586 A JP 9416586A JP H0525076 B2 JPH0525076 B2 JP H0525076B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- series
- parallel
- conducting
- frequency
- 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
- 230000002457 bidirectional effect Effects 0.000 description 13
- 230000005540 biological transmission Effects 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000001514 detection method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 241000251468 Actinopterygii Species 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明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
波以上の周波数で送受波が可能な送受波部のトラ
ツプ回路に関する。Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a detection device that transmits ultrasonic pulses and receives return reflected waves from a target object, especially when transmitting and receiving waves at two or more frequencies. This invention relates to a possible trap circuit for a wave transmitting/receiving section.
（従来の技術）
強力な超音波パルスを送波し、物標からの微弱
な反射波を受波してこれを処理表示等する探知装
置、例えば水中探知装置などでは送受波動作を効
率よく切換える目的からトラツプ回路（例えば、
実公昭55−25747号）が汎用されている。これは
双方向ダイオードを利用して送信時に送信信号の
ための共振回路と受信部側とを切離し、他方受信
時に受信信号のための共振回路と送信部側とを切
離すようになされたものである。(Prior art) Detection devices that transmit powerful ultrasonic pulses, receive weak reflected waves from targets, process and display them, etc., such as underwater detection devices, efficiently switch wave transmitting and receiving operations. Trap circuits (e.g.
Utility Model No. 55-25747) is widely used. This uses a bidirectional diode to separate the resonant circuit for the transmitted signal from the receiver side during transmission, and to separate the resonant circuit for the received signal from the transmitter side during reception. be.
又、近年魚種判別の要請から多周波による探知
が行われる傾向にあるが、振動子がその分必要と
なりセンサー部の大型化という好ましからざる欠
点を有する。これに対し、比較的新しい技術とし
て多周波の送受波を１の振動子で実現する方式が
提案、採用されている（特開昭58−63300号、特
開昭58−117798号）。 In addition, in recent years, there has been a trend towards multi-frequency detection due to the need for fish species identification, but this has the undesirable drawback of requiring a vibrator and increasing the size of the sensor section. On the other hand, as a relatively new technique, a method for realizing multi-frequency transmission and reception using a single vibrator has been proposed and adopted (Japanese Patent Laid-Open Nos. 58-63300 and 1982-117798).
（発明が解決しようとする問題点）
すなわち、１の送受波器に多周波の動作を行わ
すことから、上記トラツプ回路も各周波毎に並列
して配線する必要があり、係る部分の回路構成を
著しく複雑にするに至つている。(Problem to be Solved by the Invention) In other words, since one transducer is operated at multiple frequencies, the trap circuit described above also needs to be wired in parallel for each frequency, and the circuit configuration of this part is has become significantly more complex.
（問題点を解決するための手段）
本発明は上記に鑑みてなされたもので、
送信周波により反共振する並列共振回路が各送
信周波毎に直列に接続され、
その直列回路の後段に受信部との結合部として
の並列共振回路が接続され、
該並列共振回路を構成する素子の一方に双方向
ダイオードが直列に接続される送受信部のトラツ
プ回路を提供するものである。(Means for Solving the Problems) The present invention has been made in view of the above, and consists of parallel resonant circuits that anti-resonate depending on the transmission frequency and are connected in series for each transmission frequency, and a receiving section is provided at the rear stage of the series circuit. A trap circuit for a transmitter/receiver section is provided in which a parallel resonant circuit as a coupling section is connected to the transmitter/receiver section, and a bidirectional diode is connected in series to one of the elements constituting the parallel resonant circuit.
（作用）
本発明によれば、送信時には双方向ダイオード
の短絡によつていずれかの並列共振回路が反共振
して直列回路を開放するので受信部、結合部は切
離され、他方受信時は上記双方向ダイオードの開
放によつて得られる各並列共振回路の他方の素子
から成る直列共振回路と結合部の並列共振回路と
のマツチングにより受信周波で最大感度を得るこ
とができる。(Function) According to the present invention, when transmitting, one of the parallel resonant circuits anti-resonates due to the short circuit of the bidirectional diode and opens the series circuit, so the receiving section and the coupling section are disconnected, and when the other receiving section Maximum sensitivity can be obtained at the receiving frequency by matching the series resonant circuit formed by the other element of each parallel resonant circuit obtained by opening the bidirectional diode with the parallel resonant circuit of the coupling section.
（実施例）
第１図は本発明の一実施例を示す２周波の場合
における回路図で、第２図ａ，ｂは周波数一リア
クタンス、一出力特性を示す図である。(Example) FIG. 1 is a circuit diagram showing an example of the present invention in the case of two frequencies, and FIGS. 2a and 2b are diagrams showing frequency-reactance, one-output characteristics.
第１図において、１，２は送信部側（図示せ
ず）と振動子間に接続された双方向ダイオード
（２個のダイオードが互いに逆方向に並列接続さ
れたもの）である。又、４，５，６も同様の双方
向ダイオードである。双方向ダイオードは送信時
の如き高レベル信号に対しては短絡され、一方受
信時の如き微弱信号に対しては開放される。 In FIG. 1, numerals 1 and 2 are bidirectional diodes (two diodes connected in parallel in opposite directions) connected between the transmitter side (not shown) and the vibrator. Further, 4, 5, and 6 are also similar bidirectional diodes. The bidirectional diode is short-circuited for high-level signals such as when transmitting, and open for weak signals such as when receiving.
７，８は反共振周波w1を有する第１の並列共
振回路を構成するコンデンサとコイル９，１０は
反共振周波w2を有する第２の並列共振回路を構
成するコンデンサとコイル、１１，１２は後述す
る特性を有する並列回路を構成するコンデンサと
コイルである。１３はコイル１２，１４により結
合される受信部である。 7 and 8 are capacitors and coils that form a first parallel resonant circuit having an anti-resonant frequency w 1 ; 9 and 10 are capacitors and coils that form a second parallel resonant circuit that has an anti-resonant frequency w 2 ; 11 and 12; are a capacitor and a coil that constitute a parallel circuit with characteristics to be described later. 13 is a receiving section coupled by coils 12 and 14.
上記の回路構成において、次に動作等について
説明する。 In the above circuit configuration, the operation etc. will be explained next.
(1) 送信時の動作について（送信周波w1，w2）
送信時は双方向ダイオード１，２、４〜６は全
て短絡される。従つて、第１、第２のいずれかの
並列共振回路によつて送信周波w1，w2のいずれ
の信号も遮断され受信部１３へは供給されない。
この結果、送信信号は振動子３へのみ供給され、
振動子３を高効率の下で励振する。なお、双方向
ダイオード６は第１、第２の並列共振回路の存在
により理論上は不要であるが、反共振のＱ、又周
波数ずれを考慮して保護の万全を期すために設け
られている。(1) Operation during transmission (transmission frequencies w 1 , w 2 ) During transmission, bidirectional diodes 1, 2, and 4 to 6 are all short-circuited. Therefore, either the first or second parallel resonant circuit cuts off the signals at the transmission frequencies w 1 and w 2 and does not supply them to the receiving section 13 .
As a result, the transmission signal is supplied only to the transducer 3,
The vibrator 3 is excited with high efficiency. Although the bidirectional diode 6 is theoretically unnecessary due to the existence of the first and second parallel resonant circuits, it is provided to ensure complete protection in consideration of anti-resonance Q and frequency deviation. .
上記において、各コンデンサ７，９、コイル
８，１０の値と送信周波w1，w2との関係は、
W2 1＝１／L1C1
W2 2＝１／L2C2 ……(1)
と表わせる。 In the above, the relationship between the values of each capacitor 7, 9 and coil 8, 10 and the transmission frequency w 1 , w 2 is W 2 1 = 1/L 1 C 1 W 2 2 = 1/L 2 C 2 ... It can be expressed as (1).
(2) 受信時の動作について
受信時は逆に双方向ダイオード１，２，４〜６
は全て開放される。従つて、振動子３で受波され
た微弱信号は送信部側には供給されず、受信部１
３側に供給される。(2) Operation during reception On the contrary, bidirectional diodes 1, 2, 4 to 6 are used during reception.
are all open. Therefore, the weak signal received by the vibrator 3 is not supplied to the transmitting section, but is sent to the receiving section 1.
3 side is supplied.
この場合、振動子３から受信部１３側を見たイ
ンピーダンスが受信周波w1，w2において最小で
あることが伝送効率上望ましい。 In this case, it is desirable for transmission efficiency that the impedance viewed from the vibrator 3 to the receiving section 13 side is minimum at the receiving frequencies w 1 and w 2 .
受信部１３側をみた回路はコイル８とコンデン
サ９の直列回路とコンデンサ１１とコイル１２か
ら成る並列回路とが直列に接続されたものであ
る。このように、受信時に得られる直列回路は、
第２図の特性が必要となる点からも明らかなよう
に、ＬとＣとから構成されねばならず、このた
め、双方向ダイオード４，５は第１の並列共振回
路ではコンデンサ側に挿入され、他方第２の並列
共振回路ではコイル１０側に挿入されている。こ
こにコイル８とコンデンサ９より成る直列回路の
インピーダンスZsは
ｊ（wL1−１／wC2）
であり、その特性を第２図ａ中１点鎖線で示す。 The circuit viewed from the side of the receiving section 13 is one in which a series circuit of a coil 8 and a capacitor 9 and a parallel circuit consisting of a capacitor 11 and a coil 12 are connected in series. In this way, the series circuit obtained during reception is
As is clear from the fact that the characteristics shown in FIG. , on the other hand, is inserted on the coil 10 side in the second parallel resonant circuit. Here, the impedance Z s of the series circuit consisting of the coil 8 and the capacitor 9 is j(wL 1 -1/wC 2 ), and its characteristics are shown by the dashed line in FIG. 2a.
又、コンデンサ１１、コイル１２より成る並列
回路のインピーダンスZpは
−ｊL3／C3／wL3−１／w3C3
であり、その特性は第２図ａに実線で示す。 The impedance Z p of the parallel circuit consisting of the capacitor 11 and the coil 12 is -jL 3 /C 3 /wL 3 -1/w 3 C 3 , and its characteristics are shown by the solid line in FIG. 2a.
従つて、今
Zs（w1）＝−Zp（w1）
Zs（w2）＝−Zp（w2） …(2)
とすることにより、受信側インピーダンスを最小
（実抵抗分のみ）とすることができる（第２図
ｂ）。 Therefore, by setting Z s (w 1 )=-Z p (w 1 ) Z s (w 2 )=-Z p (w 2 )...(2), the impedance on the receiving side can be minimized (actual resistance component). (Fig. 2b).
更に、各周波におけるＱは
Q1＝w1L1−１／w1C2／Ｒ
Q2＝w2L1−１／w1C2／Ｒ ……(3)
但し、Ｒは実抵抗分
と表わされ、従つて上記Q1，Q2を設定すること
により、先ずL1，C2を求めることができる。こ
のようにして求めたL1，C2を(1)，(2)式に代入す
ることにより、C1，L2及びC3，L3が求まる。 Furthermore, Q at each frequency is Q 1 = w 1 L 1 -1/w 1 C 2 /R Q 2 = w 2 L 1 -1/w 1 C 2 /R... (3) However, R is the actual resistance Therefore, by setting Q 1 and Q 2 above, L 1 and C 2 can be found first. By substituting L 1 and C 2 obtained in this way into equations (1) and (2), C 1 , L 2 and C 3 , L 3 are obtained.
さて、第３図は本発明に係る他の実施例、例え
ば３周波の場合の回路図を示すもので、第４図
ａ，ｂは周波数一リアクタンス、一出力特性を示
す図である。 Now, FIG. 3 shows a circuit diagram of another embodiment according to the present invention, for example, in the case of three frequencies, and FIGS. 4a and 4b are diagrams showing frequency-reactance, one-output characteristics.
第３図は送信部、振動子及び受信部を省略した
図で、３０，３１は反共振周波w1を有する第１
の並列共振回路を、３２，３３は反共振周波w2
を有する第２の並列共振回路を、３４，３５は反
共振周波w3を有する第３の並列共振回路を各々
構成するコンデンサとコイルである。 FIG. 3 is a diagram in which the transmitter, the vibrator, and the receiver are omitted, and 30 and 31 are the first
32 and 33 are anti-resonant frequencies w 2
34 and 35 are a capacitor and a coil that respectively constitute a second parallel resonant circuit having an anti-resonant frequency w3 .
３６，３７及び３８，３９は後述する特性を有
する各並列回路を構成するコンデンサとコイル
で、該各並列回路は直列に接続されている。 36, 37, 38, and 39 are capacitors and coils forming parallel circuits having characteristics to be described later, and the parallel circuits are connected in series.
上記回路構成において、次に動作について説明
する。 Next, the operation of the above circuit configuration will be explained.
(1) 送信時の動作について
双方向ダイオード４０〜４２の短絡により第１
〜第３のいずれかの並列共振回路が遮断され、従
つて送信信号は省略した受信部側には供給されな
い。(1) About the operation during transmission Due to a short circuit between bidirectional diodes 40 to 42, the first
- Any third parallel resonant circuit is cut off, and therefore the transmission signal is not supplied to the omitted receiving section.
このときの各並列共振回路の定数と周波w1〜
w3の関係は
w2 1＝１／L1C1
w2 2＝１／L2C2
w2 3＝１／L3C3 ……(4)
と表わせる。 At this time, the constant and frequency of each parallel resonant circuit w 1 ~
The relationship of w 3 can be expressed as w 2 1 = 1/L 1 C 1 w 2 2 = 1/L 2 C 2 w 2 3 = 1/L 3 C 3 (4).
(2) 受信時の動作について
双方向ダイオード４０〜４２の開放により第１
〜第３の並列共振回路はコイルL1、コンデンサ
C2、コイルL3から成る直列回路に切換えられる。
この場合も前述同様、Ｌ成分とＣ成分とを有する
直列回路を構成しなければならない。この直列回
路のインピーダンスZsは
ｊ｛ｗ（L1＋L3）−１／wC2｝
であり、その特性を第４図ａ中１点鎖線で示す。(2) Regarding the operation during reception The first
~The third parallel resonant circuit consists of coil L 1 and capacitor
It is switched into a series circuit consisting of C 2 and coil L 3 .
In this case as well, a series circuit having an L component and a C component must be constructed as described above. The impedance Z s of this series circuit is j{w(L 1 +L 3 )-1/wC 2 }, and its characteristics are shown by the dashed line in FIG. 4a.
又、直列に接続された前期並列回路のインピー
ダンスZpは
−ｊ（L4／C4／wL4−L5／C5＋１／wC4／wL5−１／w
C5）
であり、その特性を第４図ａに実線で示す。 Also, the impedance Z p of the first parallel circuit connected in series is −j(L 4 /C 4 /wL 4 −L 5 /C 5 +1/wC 4 /wL 5 −1/w
C 5 ), and its characteristics are shown by the solid line in Figure 4a.
従つて、今
Zs（w1）＝−Zp（w1）
Zs（w2）＝−Zp（w2）
Zs（w3）＝−Zp（w3） ……(5)
とすることにより、受信側インピーダンスを最小
にすることができる（第４図ｂ）。 Therefore, now Z s (w 1 )=−Z p (w 1 ) Z s (w 2 )=−Z p (w 2 ) Z s (w 3 )=−Z p (w 3 ) ……(5 ), the receiving side impedance can be minimized (Fig. 4b).
そして、各周波におけるＱが
Q1＝w1（L1＋L3）−１／w1C2／Ｒ
Q2＝w2（L1＋L3）−１／w2C2／Ｒ
Q3＝w3（L1＋L3）−１／w3C2／Ｒ ……(6)
と表わされ、この(4)〜(6)式及びQ1〜Q3の設定に
よりC1〜C5、L1〜L5の各定数が求まる。 Then, the Q at each frequency is Q 1 =w 1 (L 1 +L 3 )-1/w 1 C 2 /R Q 2 =w 2 (L 1 +L 3 )-1/w 2 C 2 /R Q 3 = It is expressed as w 3 (L 1 +L 3 )-1/w 3 C 2 /R ...(6), and by these equations (4) to (6) and the settings of Q 1 to Q 3 , C 1 to C 5 , each constant of L 1 to L 5 is determined.
すなわち、一般的にはｎ周波（ｎ＝２，３，
…）の送受信を行う場合には直列に接続されたｎ
個の並列共振回路と（ｎ−１）個の並列回路とを
用いてトラツプ回路が形成される。 That is, generally n frequencies (n=2, 3,
), when transmitting and receiving n
A trap circuit is formed using these parallel resonant circuits and (n-1) parallel circuits.
（発明の効果）
以上説明したように、本発明によれば、複数の
周波数を用いた場合でもトラツプ回路としては１
個で済むので、回路を著しく簡素化することがで
きる。(Effects of the Invention) As explained above, according to the present invention, even when a plurality of frequencies are used, only one trap circuit can be used.
Since only one circuit is required, the circuit can be significantly simplified.
なお、本実施例では回路の遮断、短絡用として
双方向ダイオードを用いて説明したが、これに限
定されることなく、一般的に上記と同一の機能を
有するものであれば足り、これを総称して導通不
導通回路と呼ぶことができる。 In this embodiment, a bidirectional diode was used for interrupting and shorting the circuit, but the diode is not limited to this, and generally any diode having the same function as above is sufficient, and is collectively referred to as a bidirectional diode. It can be called a conducting/non-conducting circuit.
第１図は本発明の一実施例を示す２周波の場合
における回路図で、第２図ａ，ｂは周波数一リア
クタンス、一出力特性を示す図である。第３図は
本発明の他の実施例を示す３周波の場合における
回路図で、第４図ａ，ｂは周波数一リアクタン
ス、一出力特性を示す図である。
FIG. 1 is a circuit diagram showing an embodiment of the present invention in the case of two frequencies, and FIGS. 2a and 2b are diagrams showing frequency-reactance, one-output characteristics. FIG. 3 is a circuit diagram showing another embodiment of the present invention in the case of three frequencies, and FIGS. 4a and 4b are diagrams showing frequency-reactance, one-output characteristics.
Claims (1)
で送受波を行う１の振動子と、 上記振動子と送信部間に接続され、互いに逆方
向に並列接続される少なくとも２個のダイオード
で構成される導通不導通回路と、 上記振動子からの信号が供給される受信部と、 上記振動子と受信部間に接続され、各々が反共
振周波w1〜woを有する直列接続されたｎ種類の
LC共振回路と、 上記ｎ個のLC共振回路を構成する一方素子側
に各々直列接続され、且つその各直列接続が少な
くとも１のＬ及びＣの素子側になされ互いに逆方
向に並列接続される少なくとも２個のダイオード
で構成されるｎ個の導通不導通回路と、 上記LC共振回路と受信部間に各々直列接続さ
れたインピーダンスZp(w)）なる（ｎ−１）種類の
LC並列回路とから成り、 上記ｎ個の導通不導通回路が直列接続されない
他方素子から成るLC直列回路のインピーダンス
をZs(w)とするとき、周波w1〜woに対してZs(w)＝
−Zp(w)が成立するように各LC定数が設定されて
いることを特徴とするトラツプ回路。[Scope of Claims] 1 A vibrator that transmits and receives waves at n types of frequencies (n = 2, 3, ...) w 1 to w o ; a conducting/non-conducting circuit composed of at least two diodes connected in parallel in the direction; a receiving section to which signals from the vibrator are supplied; n types connected in series with frequencies w 1 to w o
an LC resonant circuit; and at least one of the n LC resonant circuits, each connected in series to one element side, each of which is connected in series to at least one L and C element side, and connected in parallel in opposite directions to each other. n conducting/non-conducting circuits composed of two diodes, and (n-1) types of impedances Z p (w)) connected in series between the LC resonant circuit and the receiving section.
When the impedance of the LC series circuit consisting of the n conducting and non-conducting circuits and the other element not connected in series is Z s (w), for the frequency w 1 to w o Z s ( w)=
A trap circuit characterized in that each LC constant is set so that −Z p (w) holds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9416586A JPS62250385A (en) | 1986-04-23 | 1986-04-23 | Trap circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9416586A JPS62250385A (en) | 1986-04-23 | 1986-04-23 | Trap circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62250385A JPS62250385A (en) | 1987-10-31 |
| JPH0525076B2 true JPH0525076B2 (en) | 1993-04-09 |
Family
ID=14102751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9416586A Granted JPS62250385A (en) | 1986-04-23 | 1986-04-23 | Trap circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62250385A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012208849A1 (en) * | 2012-05-25 | 2013-11-28 | Robert Bosch Gmbh | Electrical circuit for operating transceiver unit, has non-linear two-terminal device, which couples pulse generation unit and resonant circuit, where resonant circuit has inductance and capacitance, which are connected in series |
-
1986
- 1986-04-23 JP JP9416586A patent/JPS62250385A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62250385A (en) | 1987-10-31 |
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