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    • 107. 发明专利
    • Ultrasonic vibrator
    • 超音波振荡器
    • JPS59194600A
    • 1984-11-05
    • JP6844183
    • 1983-04-20
    • Tsutomu Kobayashi
    • KOBAYASHI TSUTOMU
    • H04R17/00G10K11/32
    • G10K11/32
    • PURPOSE:To control freely a position and an area of a resonance part, or a sound intensity, directivity, etc. by forming a taper of a plate-like wedge shape and a semi-cylindrical wedge shape, in the shape of a curve, in an ultrasonic vibrator. CONSTITUTION:The figure shows a side section (a) and an upper face (b) of an ultrasonic vibrator T3, and shows the case when a wedge-shaped vibrator is tapered in the shape of a curve, and a prescribed position is made to have a desired thickness between thickness t1-tn. In this way, since the vibrator is tapered in the shape of a curve, a position and an area of a resonance part, or a sound intensity, directivity, etc. can be controlled freely. Also, an ultrasonic beam and a pulse wave corresponding to the purpose can also be obtained.
    • 目的:通过形成曲线形状的板状楔形和半圆柱形楔形的锥形来自由地控制共振部分的位置和面积,或声音强度,方向性等, 在超声波振动器中。 构成:该图示出了超声波振子T3的侧面(a)和上面(b),示出了楔形振子以曲线形状变细的情况,并且规定位置为 在厚度t1-tn之间具有期望的厚度。 以这种方式,由于可以自由地控制振动器以曲线的形状渐缩,可以自由地控制谐振部分的位置和面积,或声音强度,方向性等。 此外,也可以获得与该目的相对应的超声波束和脉波。
    • 108. 发明专利
    • Ultrasonic transducer
    • 超声波传感器
    • JPS59114994A
    • 1984-07-03
    • JP22465882
    • 1982-12-21
    • Olympus Optical Co Ltd
    • ADACHI HIDEO
    • H04R1/32A61B8/00G01N29/24G10K11/32H04R17/00
    • A61B8/4281A61B8/4483G10K11/32
    • PURPOSE:To use an ultrasonic wave transducer to diagnose both long and short distance by varying the curvature radius of an ultrasonic wave radiation surface with an electric input given from outside. CONSTITUTION:A flexible piezoelectric film 12 is formed on a recessed surface of a metallic plate 9 with 1/4 wavelength thickness and generates the 1/2 wavelength resonance together with the plate 9. The shape memory alloy used to the plate 9 uses an Ni-Ti alloy, etc. which can produce the heat elastic martensitic transformation and also forms a superlattice. An ultrasonic wave transducer of such a constitution is attached to the tip of an endoscope and put into a human body. In such a case, the temperature of the plate 9 is kept at a level close to the body heat. As a result, the curvature radius of the film 12 is set at R1 to obtain an ultrasonic tomogram image having the improved image resolution of a short distance. At the same time, the current is supplied to lead wires 11a and 11b led outside the human body to actuate a heating element 10. Then the sensitivity can be improved at a long distance by setting the curvature radius of the film 12 at R2.
    • 目的:使用超声波传感器通过从外部给出的电输入改变超声波辐射表面的曲率半径来诊断长距离和短距离。 构成:柔性压电膜12形成在1/4波长厚度的金属板9的凹陷表面上,并与板9一起产生1/2波长共振。用于板9的形状记忆合金使用Ni -Ti合金等,其可以产生热弹性马氏体转变并且还形成超晶格。 将这种结构的超声波换能器安装在内窥镜的前端并放入人体内。 在这种情况下,板9的温度保持在接近体热的水平。 结果,膜12的曲率半径被设定为R1,以获得具有改善的短距离图像分辨率的超声波断层图像。 同时,电流被提供给引导到人体外部的引线11a和11b来致动加热元件10.然后,通过将膜12的曲率半径设定在R2,可以在长距离上提高灵敏度。