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    Shape memory alloy actuation apparatus
    1.
    发明授权
    Shape memory alloy actuation apparatus 有权
    形状记忆合金致动装置

    公开(公告)号：US08446475B2

    公开(公告)日：2013-05-21

    申请号：US12525906

    申请日：2008-02-11

    申请人： Richard Topliss ,  Dominic George Webber ,  Robert John Leedham ,  Anthony Hooley ,  David Charles William Richards ,  Thomas Matthew Gregory

    发明人： Richard Topliss ,  Dominic George Webber ,  Robert John Leedham ,  Anthony Hooley ,  David Charles William Richards ,  Thomas Matthew Gregory

    IPC分类号： H04N5/228 ,  H04N5/225 ,  G03B13/00

    CPC分类号： G03B3/10 ,  F03G7/065 ,  H04N5/2254 ,  H04N5/23212

    摘要： A miniature camera lens actuation apparatus comprises a support structure, a camera lens element supported on the support structure by a suspension system; and an SMA actuator connected between the support structure and the movable element to drive movement of the camera lens element. The control circuit may include a drive circuit and a sensor circuit which have separate electrical connections to the SMA actuator to reduce the impact of the resistance of the electrical connections on the sensing. The control circuit may vary the drive signal in response to a temperature signal indicative of the ambient temperature. An endstop limits movement to prevent extension of the SMA actuator in its unheated state beyond a maximum length which is at or below the length corresponding the local maximum resistance of the resistance-length curve. Control of position is effected using resistance of the SMA actuator as a measure of position. The control employs a ‘ratcheting’ method to prevent a failure condition and an initial calibration step to derive a range of target resistance values. In manufacture, the position of a lens holder is adjusted relative to a carrier to provide focussing on the image sensor of an image of an object at a distance in the range from infinity to the hyperfocal distance when the SMA actuator is heated to a predetermined temperature greater than ambient temperature.

    摘要翻译： 微型相机镜头致动装置包括支撑结构，通过悬挂系统支撑在支撑结构上的照相机镜头元件; 以及SMA致动器，其连接在所述支撑结构和所述可移动元件之间，以驱动所述相机透镜元件的移动。 控制电路可以包括驱动电路和传感器电路，其具有到SMA致动器的分离的电连接以减少电连接对感测的电阻的影响。 控制电路可以响应于指示环境温度的温度信号来改变驱动信号。 止挡限制运动，以防止SMA致动器在其未加热状态下延伸超过对应于电阻长度曲线的局部最大电阻的长度或以下的最大长度。 使用SMA致动器的电阻作为位置的度量来控制位置。 控制采用“棘轮”方法来防止故障条件和初始校准步骤导出目标电阻值的范围。 在制造中，相对于载体调整透镜保持器的位置，以便在将SMA致动器加热到预定温度时，在从无穷远到超焦距离的范围内距离处的物体的图像的图像传感器上聚焦 大于环境温度。

    SHAPE MEMORY ALLOY ACTUATION APPARATUS
    2.
    发明申请
    SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
    形状记忆合金执行装置

    公开(公告)号：US20100060776A1

    公开(公告)日：2010-03-11

    申请号：US12525906

    申请日：2008-02-11

    申请人： Richard Topliss ,  Dominic George Webber ,  Robert John Leedham ,  Anthony Hooley ,  David Charles Wilson Richards ,  Thomas Matthew Gregory

    发明人： Richard Topliss ,  Dominic George Webber ,  Robert John Leedham ,  Anthony Hooley ,  David Charles Wilson Richards ,  Thomas Matthew Gregory

    IPC分类号： H04N5/225 ,  F03G7/06 ,  G03B3/10

    CPC分类号： G03B3/10 ,  F03G7/065 ,  H04N5/2254 ,  H04N5/23212

    摘要： A miniature camera lens actuation apparatus comprises a support structure, a camera lens element supported on the support structure by a suspension system; and an SMA actuator connected between the support structure and the movable element to drive movement of the camera lens element. The control circuit may include a drive circuit and a sensor circuit which have separate electrical connections to the SMA actuator to reduce the impact of the resistance of the electrical connections on the sensing. The control circuit may vary the drive signal in response to a temperature signal indicative of the ambient temperature. An endstop limits movement to prevent extension of the SMA actuator in its unheated state beyond a maximum length which is at or below the length corresponding the local maximum resistance of the resistance-length curve. Control of position is effected using resistance of the SMA actuator as a measure of position. The control employs a ‘ratcheting’ method to prevent a failure condition and an initial calibration step to derive a range of target resistance values. In manufacture, the position of a lens holder is adjusted relative to a carrier to provide focussing on the image sensor of an image of an object at a distance in the range from infinity to the hyperfocal distance when the SMA actuator is heated to a predetermined temperature greater than ambient temperature.

    摘要翻译： 微型相机镜头致动装置包括支撑结构，通过悬挂系统支撑在支撑结构上的照相机镜头元件; 以及SMA致动器，其连接在所述支撑结构和所述可移动元件之间，以驱动所述相机透镜元件的移动。 控制电路可以包括驱动电路和传感器电路，其具有到SMA致动器的分离的电连接以减少电连接对感测的电阻的影响。 控制电路可以响应于指示环境温度的温度信号来改变驱动信号。 止挡限制运动，以防止SMA致动器在其未加热状态下延伸超过对应于电阻长度曲线的局部最大电阻的长度或以下的最大长度。 使用SMA致动器的电阻作为位置的度量来控制位置。 控制采用“棘轮”方法来防止故障条件和初始校准步骤导出目标电阻值的范围。 在制造中，相对于载体调整透镜保持器的位置，以便在将SMA致动器加热到预定温度时，在从无穷远到超焦距离的范围内距离处的物体的图像的图像传感器上聚焦 大于环境温度。

    Shape memory alloy actuation apparatus
    3.
    发明授权
    Shape memory alloy actuation apparatus 有权
    形状记忆合金致动装置

    公开(公告)号：US08073320B2

    公开(公告)日：2011-12-06

    申请号：US12525909

    申请日：2008-02-11

    申请人： Richard Topliss ,  Shinichi Makino ,  Anthony Hooley ,  Dominic George Webber

    发明人： Richard Topliss ,  Shinichi Makino ,  Anthony Hooley ,  Dominic George Webber

    IPC分类号： G03B3/10

    CPC分类号： G03B3/10 ,  G02B7/005 ,  G02B7/08

    摘要： A miniature camera lens actuation apparatus provides an auto-macro function in which a camera lens element has two focus positions. In one type of apparatus, a shape memory alloy actuator arranged to drive movement of the camera lens element relative to a support structure against an end-stop arranged to limit the movement. The shape memory alloy actuator is connected to one of the movable element and the support structure by a compliant connector. This limits the stresses on the shape memory alloy actuator and therefore increases its lifetime. In another type of apparatus, the suspension system supporting the movable element on the support structure provides the movable element with two stable positions along the movement direction.

    摘要翻译： 微型相机镜头致动装置提供自动微距功能，其中相机透镜元件具有两个焦点位置。 在一种类型的装置中，形状记忆合金致动器被布置成驱动相机镜头元件相对于支撑结构的运动而抵靠设置成限制运动的端部止动件。 形状记忆合金致动器通过柔性连接器连接到可移动元件和支撑结构中的一个上。 这限制了形状记忆合金致动器上的应力，从而增加其寿命。 在另一种类型的装置中，支撑结构上支撑可移动元件的悬架系统沿着运动方向向可移动元件提供两个稳定的位置。

    SHAPE MEMORY ALLOY ACTUATION APPARATUS
    4.
    发明申请
    SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
    形状记忆合金执行装置

    公开(公告)号：US20100074607A1

    公开(公告)日：2010-03-25

    申请号：US12525909

    申请日：2008-02-11

    申请人： Richard Topliss ,  Shinichi Makino ,  Anthony Hooley ,  Dominic George Webber

    发明人： Richard Topliss ,  Shinichi Makino ,  Anthony Hooley ,  Dominic George Webber

    IPC分类号： G03B3/10 ,  H04N5/225 ,  G02B7/04 ,  F03G7/06

    CPC分类号： G03B3/10 ,  G02B7/005 ,  G02B7/08

    摘要： A miniature camera lens actuation apparatus provides an auto-macro function in which a camera lens element has two focus positions. In one type of apparatus, a shape memory alloy actuator arranged to drive movement of the camera lens element relative to a support structure against an end-stop arranged to limit the movement. The shape memory alloy actuator is connected to one of the movable element and the support structure by a compliant connector. This limits the stresses on the shape memory alloy actuator and therefore increases its lifetime. In another type of apparatus, the suspension system supporting the movable element on the support structure provides the movable element with two stable positions along the movement direction.

    摘要翻译： 微型相机镜头致动装置提供自动微距功能，其中相机透镜元件具有两个焦点位置。 在一种类型的装置中，形状记忆合金致动器被布置成驱动照相机镜头元件相对于支撑结构的运动抵靠设置成限制运动的端部止动件。 形状记忆合金致动器通过柔性连接器连接到可移动元件和支撑结构中的一个上。 这限制了形状记忆合金致动器上的应力，从而增加其寿命。 在另一种类型的装置中，支撑结构上支撑可移动元件的悬架系统沿着运动方向向可移动元件提供两个稳定的位置。

    Shape memory alloy actuation apparatus
    5.
    发明授权
    Shape memory alloy actuation apparatus 有权
    形状记忆合金致动装置

    公开(公告)号：US08593568B2

    公开(公告)日：2013-11-26

    申请号：US12740488

    申请日：2008-10-30

    申请人： Richard Topliss ,  Dominic George Webber

    发明人： Richard Topliss ,  Dominic George Webber

    IPC分类号： H04N5/225

    CPC分类号： F03G7/065 ,  G02B7/08 ,  G03B3/10 ,  H04N5/2257

    摘要： A shape memory alloy actuation apparatus comprises a movable element supported on a support structure by a suspension system comprising a plurality of resilient flexures. A shape memory alloy actuator drives movement of the movable element on contraction. An end-stop limits the movement of the movable element in the opposite direction. Rather than using the resilient flexures of the suspension system as the sole biassing means, an additional Massing element biasses the movable element against the SMA actuator. When the moveable element is held against the end-stop, the force applied by the biassing element is greater than the force applied by the flexures of the suspension system. This reduces the design constraints, for example allowing a greater range of movement.

    摘要翻译： 形状记忆合金致动装置包括通过包括多个弹性挠曲的悬架系统支撑在支撑结构上的可移动元件。 形状记忆合金致动器驱动可动元件的收缩运动。 终点限制可移动元件在相反方向上的运动。 除了使用悬架系统的弹性挠曲件作为唯一的偏置装置之外，附加的质量元件将可移动元件偏压抵靠SMA致动器。 当可移动元件抵靠端挡时，由偏置元件施加的力大于由悬架系统的挠曲力施加的力。 这减少了设计限制，例如允许更大的移动范围。

    SHAPE MEMORY ALLOY ACTUATION APPARATUS
    6.
    发明申请
    SHAPE MEMORY ALLOY ACTUATION APPARATUS 有权
    形状记忆合金执行装置

    公开(公告)号：US20100283887A1

    公开(公告)日：2010-11-11

    申请号：US12740488

    申请日：2008-10-30

    申请人： Richard Topliss ,  Dominic George Webber

    发明人： Richard Topliss ,  Dominic George Webber

    IPC分类号： H04N5/232 ,  F03G7/06 ,  G02B7/02

    CPC分类号： F03G7/065 ,  G02B7/08 ,  G03B3/10 ,  H04N5/2257

    摘要： A shape memory alloy actuation apparatus comprises a movable element supported on a support structure by a suspension system comprising a plurality of resilient flexures. A shape memory alloy actuator drives movement of the movable element on contraction. An end-stop limits the movement of the movable element in the opposite direction. Rather than using the resilient flexures of the suspension system as the sole biassing means, an additional Massing element biasses the movable element against the SMA actuator. When the moveable element is held against the end-stop, the force applied by the biassing element is greater than the force applied by the flexures of the suspension system. This reduces the design constraints, for example allowing a greater range of movement.

    摘要翻译： 形状记忆合金致动装置包括通过包括多个弹性挠曲的悬架系统支撑在支撑结构上的可移动元件。 形状记忆合金致动器驱动可动元件的收缩运动。 终点限制可移动元件在相反方向上的运动。 除了使用悬架系统的弹性挠曲件作为唯一的偏置装置之外，附加的质量元件将可移动元件偏压抵靠SMA致动器。 当可移动元件抵靠端挡时，由偏置元件施加的力大于由悬架系统的挠曲力施加的力。 这减少了设计限制，例如允许更大的移动范围。

    Method of creating a locating or load bearing surface
    9.
    发明授权
    Method of creating a locating or load bearing surface 有权
    创建定位或承载面的方法

    公开(公告)号：US06468456B1

    公开(公告)日：2002-10-22

    申请号：US09491528

    申请日：2000-01-26

    申请人： Dominic George Webber ,  Julian Perry

    发明人： Dominic George Webber ,  Julian Perry

    IPC分类号： B29C3910

    CPC分类号： B29C39/02 ,  B29C33/0038 ,  B29C33/42 ,  B29C39/10 ,  Y10T29/4998

    摘要： A method of creating a locating or load bearing surface having a desired flatness or profile. The method comprises: a) providing a base on which the surface is to be created; b) locating a moulding member having a master surface with the desired flatness or profile facing and spaced from the base; c) supplying a curable material to a region between the base and the master surface whereby the curable material contacts both the base and the master surface; d) curing the curable material; and, e) removing the moulding member so as to leave the surface having the desired flatness or profile provided on the exposed surface of the cured material.

    摘要翻译： 一种产生具有所需平面度或轮廓的定位或承载表面的方法。 该方法包括：a）提供要在其上形成表面的基底; b）定位具有主表面的成型构件，其具有面向和与基座间隔开的所需平面度或轮廓; c）将可固化材料供应到区域 在基部和主表面之间，由此可固化材料接触基底和主表面; d）固化可固化材料; 以及e）移除所述模制构件以使所述表面具有设置在所述固化材料的暴露表面上的所需的平坦度或轮廓。