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    • 1. 发明申请
    • METHOD AND APPARATUS FOR INCREASING BIMORPH DISPLACEMENT RANGE
    • 增加双相位移范围的方法和装置
    • WO1994027330A1
    • 1994-11-24
    • PCT/US1994003823
    • 1994-03-07
    • TELESENSORY CORPORATION
    • TELESENSORY CORPORATIONLINVILL, John, G.STARKIE, Alan, H.
    • H01L41/08
    • H01L41/042G09B21/003H01L41/094
    • A bimorph apparatus having an extended range of displacement is disclosed herein. The bimorph apparatus is typical in that it includes a bimorph having a conductive vane (7) sandwiched between first (5) and second (6) piezoelectric layers, free for movement in response to electrical signals applied thereto. The bimorph includes a driver circuit for developing a first potential drop across the first layer which induces contraction thereof. In addition, however, a second driver circuit operates to develop a second potential drop different from the first potential drop across the second layer contemporaneous with development of the first potential drop, thereby inducing expansion of the second layer. In this way simultaneous contraction and expansion of the first and second layers results in extended displacement of the free portion of the bimorph in a first direction. The second driver circuit may be adapted to apply a third electrical signal to the second layer, and the first driver circuit implemented to apply a fourth electrical signal to the first layer simultaneously with application of the third signal to the second layer. In this manner extended movement of the free portion of the bimorph is induced in the opposite direction or some other second direction.
    • 本文公开了具有扩展的位移范围的双压电晶片装置。 双压电晶片装置是典型的,因为它包括具有夹在第一(5)和第二(6)压电层之间的导电叶片(7)的双压电晶片,响应于施加到其上的电信号而自由运动。 双压电晶片包括驱动电路,用于在第一层上开发引起其收缩的第一电位降。 然而,此外,第二驱动器电路用于开发与第一电位降的发展同时发生的与第二层的第一电位差不同的第二电位降,从而引起第二层的膨胀。 以这种方式,第一和第二层的同时收缩和膨胀导致双压电晶片的自由部分沿第一方向的扩展位移。 第二驱动器电路可以适于将第三电信号施加到第二层,并且第一驱动器电路被实施为在向第二层施加第三信号的同时向第一层施加第四电信号。 以这种方式,在相反方向或某个其它第二方向上引起双压电晶片的自由部分的延伸运动。