【０００１】
【発明が属する技術分野】
本発明は、無指向性に超音波を発生し、その反射波の方向を特定して検出することができる超音波振動子に関するものである。
【０００２】
【従来の技術】
従来、超音波ソナーとしては、１つの超音波振動子を回転して順次超音波を照射し、この超音波の反射波を他の超音波振動子で受信するか、他の複数の超音波振動子を円弧状に並べて受信するようにしている。
【０００３】
【発明が解決しようとする課題】
しかしながら、このような超音波ソナーでは、超音波を照射するために、超音波振動子を回転する構成が必要であり、又、超音波の反射波を受信するための超音波振動子も同様に回転するか、又は複数の超音波振動子のそれぞれからの受信信号を遅延回路を通して受信するようにしているので、構成が複雑になるという問題があった。
【０００４】
【課題を解決しようとする手段】
本発明は、円筒体を金属で構成し、該円筒体の側面に複数の短冊状に切断されたＰＶＤＦ振動子をほぼ等間隔に固着し、前記円筒体の一方の端面に円筒型の高周波振動子を固着したものであり、又、円筒体を樹脂で構成し、該円筒体の側面に複数の短冊状に切断された電極をほぼ等間隔に接着し、該電極の上にＰＶＤＦ振動子を固着し、前記円筒体の一方の端面に円筒型の高周波振動子を固着したものである。
【０００５】
【発明の実施の形態】
本発明は、円筒体の側面にＰＶＤＦ振動子を短冊状に固着し、円筒体の端面に円筒型の高周波振動子を一体に構成することにより、円筒型の高周波振動子で発生した超音波は３６０度方向に照射され、その反射波は円筒体の短冊状のＰＶＤＦ振動子のいずれかで受信するが、論理的にその指向角が電極の数で決まることにより、受信信号に遅延回路を通す必要が無く、反射物体の方向を検知することができるので、構成が簡単になる。
【０００６】
【実施例】
図１は本発明の実施例の超音波振動子の斜視図、図２は図１の超音波振動子の側面図で、円筒体１は樹脂で構成され、円筒体１の側面に共通電極２が接着され、そのうえに短冊状に構成した複数のＰＶＤＦ振動子３が固着され、又、円筒体１の端面に円筒型の高周波振動子４が固着されている。
【０００７】
このように構成した本実施例の超音波振動子では、円筒型のの高周波振動子４に発振器（図示せず）から発振信号を入力すると、円筒型の高周波振動子４から発生した超音波は３６０度方向に照射され、又、その反射波は円筒体１に固着されたＰＶＤＦ振動子３で受信されるが、反射物体の方向は受信されるＰＶＤＦ振動子３の数で決まるので、ＰＶＤＦ振動子３で受信された信号は遅延回路を通すことなく、反射物体の方向を検知することができる。
【０００８】
なお、上記実施例では、円筒体１を樹脂で構成し、円筒体１の側面に共通電極２を接着したが、円筒体１を金属で構成し、円筒体１の金属を共通電極として使用するために、金属の円筒体１に直接複数の短冊状のＰＶＤＦを導電性の接着剤で固着するようにしてもよい。
【０００９】
【発明の効果】
以上説明したように、本発明の超音波振動子は、円筒体の側面にＰＶＤＦ振動子を短冊状に固着し、円筒体の端面に円筒型の高周波振動子を一体に構成することにより、円筒型の高周波振動子で発生した超音波は３６０度方向に照射され、その反射波は円筒体の短冊状のＰＶＤＦ振動子のいずれかで受信するが、論理的にその指向角が電極の数で決まることにより、受信信号に遅延回路を通す必要が無く、反射物体の方向を検知することができるので、構成が簡単になるという利点がある。
【図面の簡単な説明】
【図１】本発明の実施例の超音波振動子の斜視図である。
【図２】図１の超音波振動子の側面図である。
【符号の説明】
１ 円筒体
２ 共通電極
３ ＰＶＤＦ振動子
４ 円筒型の高周波振動子[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an ultrasonic vibrator capable of generating an ultrasonic wave in a non-directional manner and specifying and detecting a direction of a reflected wave thereof.
[0002]
[Prior art]
Conventionally, as an ultrasonic sonar, one ultrasonic vibrator is rotated to sequentially emit ultrasonic waves, and a reflected wave of this ultrasonic wave is received by another ultrasonic vibrator or another ultrasonic vibrator is used. The children are arranged in an arc to receive.
[0003]
[Problems to be solved by the invention]
However, such an ultrasonic sonar requires a configuration for rotating the ultrasonic vibrator in order to irradiate the ultrasonic wave, and the ultrasonic vibrator for receiving the reflected wave of the ultrasonic wave is also similarly required. Since the signal is rotated or the reception signal from each of the plurality of ultrasonic transducers is received through the delay circuit, there is a problem that the configuration is complicated.
[0004]
[Means to solve the problem]
According to the present invention, a cylindrical body is formed of metal, and a plurality of strip-shaped PVDF vibrators are fixed to side surfaces of the cylindrical body at substantially equal intervals, and a cylindrical high-frequency vibration is applied to one end surface of the cylindrical body. The cylindrical body is made of resin, a plurality of strip-shaped electrodes are adhered to the side surface of the cylindrical body at substantially equal intervals, and a PVDF vibrator is placed on the electrodes. The cylindrical high-frequency vibrator is fixed to one end face of the cylindrical body.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
According to the present invention, the ultrasonic waves generated by the cylindrical high-frequency vibrator are fixed by fixing the PVDF vibrator to the side surface of the cylindrical body in a strip shape and integrally forming the cylindrical high-frequency vibrator on the end face of the cylindrical body. Irradiation is performed in a 360-degree direction, and the reflected wave is received by one of the cylindrical PVDF vibrators. The directivity angle is logically determined by the number of electrodes, so that the received signal passes through a delay circuit. Since there is no need to detect the direction of the reflecting object, the configuration is simplified.
[0006]
【Example】
FIG. 1 is a perspective view of an ultrasonic vibrator according to an embodiment of the present invention, and FIG. 2 is a side view of the ultrasonic vibrator of FIG. 1. A cylindrical body 1 is made of resin. Are adhered, a plurality of strip-shaped PVDF vibrators 3 are fixed thereon, and a cylindrical high-frequency vibrator 4 is fixed to an end face of the cylindrical body 1.
[0007]
In the ultrasonic vibrator of the present embodiment configured as described above, when an oscillation signal is input from an oscillator (not shown) to the cylindrical high-frequency vibrator 4, the ultrasonic waves generated from the cylindrical high-frequency vibrator 4 Irradiation is performed in a 360-degree direction, and the reflected wave is received by the PVDF vibrator 3 fixed to the cylindrical body 1. However, since the direction of the reflecting object is determined by the number of the received PVDF vibrators 3, the PVDF vibrating is performed. The signal received by the child 3 can detect the direction of the reflecting object without passing through the delay circuit.
[0008]
In the above embodiment, the cylindrical body 1 is made of resin, and the common electrode 2 is bonded to the side surface of the cylindrical body 1. However, the cylindrical body 1 is made of metal, and the metal of the cylindrical body 1 is used as the common electrode. For this purpose, a plurality of rectangular PVDFs may be directly fixed to the metal cylinder 1 with a conductive adhesive.
[0009]
【The invention's effect】
As described above, the ultrasonic vibrator of the present invention has a cylindrical structure in which a PVDF vibrator is fixed in a strip shape on the side surface of a cylindrical body, and a cylindrical high-frequency vibrator is integrally formed on an end surface of the cylindrical body. The ultrasonic wave generated by the high-frequency vibrator of the type is irradiated in the direction of 360 degrees, and the reflected wave is received by one of the cylindrical rectangular PVDF vibrators, but the directivity angle is logically determined by the number of electrodes. With this determination, it is not necessary to pass the reception signal through the delay circuit, and the direction of the reflection object can be detected. Therefore, there is an advantage that the configuration is simplified.
[Brief description of the drawings]
FIG. 1 is a perspective view of an ultrasonic transducer according to an embodiment of the present invention.
FIG. 2 is a side view of the ultrasonic transducer of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Common electrode 3 PVDF vibrator 4 Cylindrical high frequency vibrator
