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    • 2. 发明公开
    • 초음파 센서
    • 超声波传感器
    • KR1020090068264A
    • 2009-06-25
    • KR1020097008068
    • 2007-10-15
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 무라타코지코타니마사토아사다타카아키시마모토타카유키히라노히로유키후루야미오
    • G01H11/08B60R21/00
    • G10K9/122G01S7/521G01S15/931G10K9/22G01H11/08B60R21/00
    • [PROBLEMS] To provide an ultrasonic sensor having an enhanced obstacle shortest detection distance resolution by attenuating the unwanted vibration of the sides of the case and reducing the reverberating time. [MEANS FOR SOLVING PROBLEMS] A piezoelectric element (3) is fixed to the inside surface of the bottom (1a) of a bottomed cylindrical outer case (1). An annular inner case (2) having a center hole (2b) extending in the axial direction inside the side wall of the outer case (1). A flat part (2d) is provided around the center hole (2b) of the inner case (2). A viscoelastic filler (6) is placed in the center hole (2b) to the flat part(2d). Plate members (7) are opposed on the flat part (2d), with the filler (6) interposed therebetween. When the inner case (2) vibrates, the plate members (7) hardly vibrate and therefore the filler (6) sandwiched between the flat part (2d) and the plate members (7) shear-deform, and the vibration is suppressed by the viscoelastic attenuation action.
    • 本发明提供一种具有增强的障碍物最短检测距离分辨率的超声波传感器,其通过衰减壳体的侧面的不需要的振动并减少混响时间。 解决问题的手段压电元件(3)固定在有底圆柱形外壳(1)的底部(1a)的内表面上。 具有在外壳(1)的侧壁内部沿轴向延伸的中心孔(2b)的环状内壳体(2)。 在内壳体(2)的中心孔(2b)的周围设置有平坦部(2d)。 将粘弹性填料(6)放置在平坦部分(2d)的中心孔(2b)中。 板构件(7)在平坦部分(2d)上相对,填料(6)插入其间。 当内壳体2振动时,板件7几乎不振动,夹在平板部件(2d)和板件(7)之间的填料(6)变形, 粘弹性衰减作用。
    • 4. 发明公开
    • 초음파 트랜스듀서
    • 超声波传感器
    • KR1020090075872A
    • 2009-07-09
    • KR1020097010856
    • 2007-11-22
    • 가부시키가이샤 무라타 세이사쿠쇼
    • 히라노히로유키아사다타카아키후루야미오니시에준이치
    • G10K9/122G10K9/22B06B1/06H04R17/02H04R1/32
    • G10K9/22H04R17/00G10K9/122B06B1/06H04R1/32H04R17/02
    • A piezoelectric element (3) is placed on the inner bottom surface of a closed-bottomed outer container (1), and an inner case (2) is placed inside the outer case (1). Vibration of the outer case (1) by the piezoelectric element is restrained by mass by using that surface (ultrasonic vibration acting surface) of the inner case (2) that faces the bottom surface of the outer case (1). A first cutout section (11) is provided in the ultrasonic vibration acting surface, at a portion facing the position where the piezoelectric element (3) is placed, and the first cutout section (11) flattens an ultrasonic beam generated by vibration of the piezoelectric element (3) and outer case (1). Also, second cutout sections (12a, 12b), line symmetrical about the major axis of the first cutout section (11), are formed at positions away from the first cutout section (11).
    • 压电元件(3)放置在封闭底部外容器(1)的内底表面上,内壳体(2)放置在外壳体(1)的内部。 通过使用面对外壳(1)的底面的内壳体(2)的表面(超声波振动作用面),压电元件的外壳(1)的振动被质量约束。 第一切口部(11)设置在超声波振动作用面上,与面对压电元件(3)的位置相对的部分,第一切口部(11)使由压电体(3)的振动产生的超声波束变宽 元件(3)和外壳(1)。 此外,在远离第一切口部(11)的位置形成有与第一切口部(11)的长轴对称的第二切口部(12a,12b)。