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公开(公告)号：US20110279916A1
公开(公告)日：2011-11-17
申请号：US13146462
申请日：2010-01-27
IPC分类号： G02B7/04
摘要： An SMA actuation apparatus comprises a camera lens element supported on a support structure by a plurality of flexures. An SMA wire at an acute angle to the movement axis and a biassing element are connected between the support structure and the movable element. A component of the force applied by the SMA wire perpendicular to the movement axis compresses the flexures causing them to apply a force to the movable element having a component along the movement axis in the same direction as the SMA wire. An end-stop limits the movement of the movable element, and the moment applied by the end-stop to the movable element about the centre of stiffness is equal to the moment applied by the SMA wire about the centre of stiffness at the point when the movable element loses contact with the end-stop on contraction of the SMA wire.
摘要翻译： SMA致动装置包括通过多个挠曲件支撑在支撑结构上的照相机镜头元件。 与运动轴成锐角的SMA线和偏置元件连接在支撑结构和可移动元件之间。 由SMA线垂直于移动轴施加的力的分量压缩挠曲件，使得它们沿着与SMA线相同的方向沿着运动轴线向具有部件的可移动元件施加力。 止挡限制了可移动元件的移动，并且由端部止动件围绕刚度中心施加到可移动元件的力矩等于SMA线围绕刚度中心处的刚度中心施加的力矩 可移动元件与SMA线的收缩端止停止接触。
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公开(公告)号：US20130002933A1
公开(公告)日：2013-01-03
申请号：US13581150
申请日：2011-02-28
CPC分类号： G03B3/10 , G02B7/005 , G02B7/08 , G02B27/646 , H04N5/2254 , H04N5/23287
摘要： An SMA actuation apparatus uses SMA actuator wires to move a movable element supported on a support structure, for example to provide optical image stabilisation. Eight SMA actuator wires are arranged inclined with respect to a notional primary axis with a pair of the SMA actuator wires on each of four sides around the primary axis. The SMA actuators are connected so that on contraction two groups of four SMA actuator wires provide a force with a component in opposite directions along the primary axis, so that the groups are capable of providing movement along the primary axis. The SMA actuator wires of each group have 2-fold rotational symmetry about the primary axis, so that there are SMA actuator wires opposing each other that are capable of providing lateral movement or tilting.
摘要翻译： SMA致动装置使用SMA致动器线来移动支撑在支撑结构上的可移动元件，例如以提供光学图像稳定。 八个SMA致动器线相对于概念主轴倾斜地布置，在主轴上的四个侧面中的每一侧上具有一对SMA致动器线。 SMA致动器被连接，使得在收缩时，两组四个SMA致动器线沿着主轴线向相反方向提供与部件成比例的力，使得这些组能够沿主轴提供运动。 每个组的SMA致动器导线围绕主轴线具有2倍的旋转对称性，使得存在能够提供横向运动或倾斜的彼此相对的SMA致动器线。
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公开(公告)号：US20130222685A1
公开(公告)日：2013-08-29
申请号：US13814766
申请日：2011-08-03
IPC分类号： H04N5/225
CPC分类号： H04N5/2251 , G02B27/646 , G03B5/00 , G03B2205/0023 , G03B2205/0076 , H04N1/00307 , H04N5/2257 , H04N5/23287
摘要： In a camera apparatus, two SMA actuator subsystems each comprise two SMA wires connected between a camera unit and a support structure, hooked over a pivot element defining pivot axes that lie in a common plane along the optical axis. Differential contraction of the SMA wires drives rotation. The SMA actuator subsystems are opposed, but the SMA wires of each subsystem are fixed respectively to the camera unit and the support structure, reducing the height. A non-conductive substrate supporting conductive tracks electrically connected to the SMA actuator system is configured as a flexure arrangement between the camera unit and the support structure. The flexure arrangement is connected to the camera unit at a position in the common plane reducing lateral resistance to tilt. Use of an intermediate connector element allows the circuit board to be arranged in front of the intermediate connector inside the height of the lens system.
摘要翻译： 在相机装置中，两个SMA致动器子系统各自包括连接在相机单元和支撑结构之间的两条SMA线，钩在枢轴元件上，该枢轴元件限定位于沿着光轴的公共平面中的枢转轴线。 SMA线的差动收缩驱动旋转。 SMA执行器子系统相对，但每个子系统的SMA线分别固定在摄像机单元和支撑结构上，降低了高度。 电连接到SMA致动器系统的支撑导电轨道的非导电衬底被配置为相机单元和支撑结构之间的挠曲布置。 弯曲布置在公共平面中的位置处连接到相机单元，减小横向阻力以倾斜。 使用中间连接器元件允许电路板布置在透镜系统的高度内的中间连接器的前面。
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公开(公告)号：US08588598B2
公开(公告)日：2013-11-19
申请号：US13056928
申请日：2009-07-24
摘要： A shape memory alloy actuation apparatus comprises a movable element suspended on a support structure by a plurality of flexures which are non-uniformly configured to apply forces having differing components perpendicular to the movement axis generating a net moment around the center of mass of the movable element in an opposite sense from the moment generated by the actuation force. A shape memory alloy wire is coupled between the support structure and an intermediate body engaging the movable element through a pivotal contact to avoid lateral force transfer. Also coupled between the support structure and the intermediate body is a resilient biassing flexure plastically deformed in a partial region thereof. The shape memory alloy wire is crimped by a crimping member fixed to the support structure holding the shape memory alloy wire against a curved surface from which the shape alloy memory wire extends to the movable element.
摘要翻译： 形状记忆合金致动装置包括通过多个弯曲部悬挂在支撑结构上的可移动元件，所述挠曲不均匀地构造成施加垂直于运动轴的不同分量的力，从而产生围绕可移动元件的质心的净力矩 在与由致动力产生的时刻相反的意义上。 形状记忆合金丝线联接在支撑结构和通过枢轴接触接合可移动元件的中间体之间以避免横向力传递。 还支撑结构和中间体之间的耦合是在其部分区域中塑性变形的弹性偏压挠曲件。 形状记忆合金线被固定在保持形状记忆合金线的支撑结构上的压接构件压接在弯曲表面上，形状合金记忆线从该表面延伸到可移动元件。
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公开(公告)号：US09137429B2
公开(公告)日：2015-09-15
申请号：US13814766
申请日：2011-08-03
CPC分类号： H04N5/2251 , G02B27/646 , G03B5/00 , G03B2205/0023 , G03B2205/0076 , H04N1/00307 , H04N5/2257 , H04N5/23287
摘要： In a camera apparatus, two SMA actuator subsystems each comprise two SMA wires connected between a camera unit and a support structure, hooked over a pivot element defining pivot axes that lie in a common plane along the optical axis. Differential contraction of the SMA wires drives rotation. The SMA actuator subsystems are opposed, but the SMA wires of each subsystem are fixed respectively to the camera unit and the support structure, reducing the height. A non-conductive substrate supporting conductive tracks electrically connected to the SMA actuator system is configured as a flexure arrangement between the camera unit and the support structure. The flexure arrangement is connected to the camera unit at a position in the common plane reducing lateral resistance to tilt. Use of an intermediate connector element allows the circuit board to be arranged in front of the intermediate connector inside the height of the lens system.
摘要翻译： 在相机装置中，两个SMA致动器子系统各自包括连接在相机单元和支撑结构之间的两条SMA线，钩在枢轴元件上，该枢轴元件限定位于沿着光轴的公共平面中的枢转轴线。 SMA线的差动收缩驱动旋转。 SMA执行器子系统相对，但每个子系统的SMA线分别固定在摄像机单元和支撑结构上，降低了高度。 电连接到SMA致动器系统的支撑导电轨道的非导电衬底被配置为相机单元和支撑结构之间的挠曲布置。 弯曲布置在公共平面中的位置处连接到相机单元，减小横向阻力以倾斜。 使用中间连接器元件允许电路板布置在透镜系统的高度内的中间连接器的前面。
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公开(公告)号：US08830335B2
公开(公告)日：2014-09-09
申请号：US13581150
申请日：2011-02-28
CPC分类号： G03B3/10 , G02B7/005 , G02B7/08 , G02B27/646 , H04N5/2254 , H04N5/23287
摘要： An SMA actuation apparatus uses SMA actuator wires to move a movable element supported on a support structure, for example to provide optical image stabilization. Eight SMA actuator wires are arranged inclined with respect to a notional primary axis with a pair of the SMA actuator wires on each of four sides around the primary axis. The SMA actuators are connected so that on contraction two groups of four SMA actuator wires provide a force with a component in opposite directions along the primary axis, so that the groups are capable of providing movement along the primary axis. The SMA actuator wires of each group have 2-fold rotational symmetry about the primary axis, so that there are SMA actuator wires opposing each other that are capable of providing lateral movement or tilting.
摘要翻译： SMA致动装置使用SMA致动器线来移动支撑在支撑结构上的可移动元件，例如以提供光学图像稳定。 八个SMA致动器线相对于概念主轴倾斜地布置，在主轴上的四个侧面中的每一侧上具有一对SMA致动器线。 SMA致动器被连接，使得在收缩时，两组四个SMA致动器线沿着主轴线向相反方向提供与部件成比例的力，使得这些组能够沿主轴提供运动。 每个组的SMA致动器导线围绕主轴线具有2倍的旋转对称性，使得存在能够提供横向运动或倾斜的彼此相对的SMA致动器线。
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公开(公告)号：US08441749B2
公开(公告)日：2013-05-14
申请号：US13146462
申请日：2010-01-27
摘要： An SMA actuation apparatus comprises a camera lens element supported on a support structure by a plurality of flexures. An SMA wire at an acute angle to the movement axis and a biasing element are connected between the support structure and the movable element. A component of the force applied by the SMA wire perpendicular to the movement axis compresses the flexures causing them to apply a force to the movable element having a component along the movement axis in the same direction as the SMA wire. An end-stop limits the movement of the movable element, and the moment applied by the end-stop to the movable element about the center of stiffness is equal to the moment applied by the SMA wire about the center of stiffness at the point when the movable element loses contact with the end-stop on contraction of the SMA wire.
摘要翻译： SMA致动装置包括通过多个挠曲件支撑在支撑结构上的照相机镜头元件。 与运动轴成锐角的SMA线和偏置元件连接在支撑结构和可移动元件之间。 由SMA线垂直于移动轴施加的力的分量压缩挠曲件，使得它们沿着与SMA线相同的方向沿着运动轴线向具有部件的可移动元件施加力。 止挡限制了可移动元件的移动，并且由端部止动件围绕刚度中心施加到可移动元件的力矩等于SMA线围绕刚度中心处的刚度中心施加的力矩 可移动元件与SMA线的收缩端止停止接触。
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公开(公告)号：US20110179786A1
公开(公告)日：2011-07-28
申请号：US13056928
申请日：2009-07-24
IPC分类号： F03G7/06
摘要： A shape memory alloy actuation apparatus comprises a movable element suspended on a support structure by a plurality of flexures which are non-uniformly configured to apply forces having differing components perpendicular to the movement axis generating a net moment around the centre of mass of the movable element in an opposite sense from the moment generated by the actuation force. A shape memory alloy wire is coupled between the support structure and an intermediate body engaging the movable element through a pivotal contact to avoid lateral force transfer. Also coupled between the support structure and the intermediate body is a resilient biassing flexure plastically deformed in a partial region thereof. The shape memory alloy wire is crimped by a crimping member fixed to the support structure holding the shape memory alloy wire against a curved surface from which the shape alloy memory wire extends to the movable element.
摘要翻译： 形状记忆合金致动装置包括通过多个弯曲部悬挂在支撑结构上的可移动元件，所述挠曲不均匀地构造成施加垂直于运动轴的不同分量的力，从而产生围绕可移动元件的质心的净力矩 在与由致动力产生的时刻相反的意义上。 形状记忆合金丝线联接在支撑结构和通过枢轴接触接合可移动元件的中间体之间以避免横向力传递。 还支撑结构和中间体之间的耦合是在其部分区域中塑性变形的弹性偏移挠曲。 形状记忆合金线被固定在保持形状记忆合金线的支撑结构上的压接构件压接在弯曲表面上，形状合金记忆线从该表面延伸到可移动元件。
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公开(公告)号：US20110277462A1
公开(公告)日：2011-11-17
申请号：US13126401
申请日：2009-10-29
申请人： Thomas Matthew Gregory , Robert John Leedham , David Charles William Richards , Richard Topliss
发明人： Thomas Matthew Gregory , Robert John Leedham , David Charles William Richards , Richard Topliss
IPC分类号： F01B29/10
CPC分类号： F03G7/065 , G03B3/10 , H04N5/2254 , H04N5/2257
摘要： An SMA actuation apparatus comprises: an SMA actuator arranged to drive movement of a movable element; a current supply supplying a drive current; a detection circuit detecting a measure of the resistance of the SMA actuator; and a control unit operative to generate a closed-loop control signal supplied to current supply for controlling the power of the drive current to drive the resistance of the SMA actuator to a target value. The control unit derives: an estimate of a characteristic temperature of the SMA actuation apparatus on the basis of the supplied power, using a thermal model; and a resistance offset on the basis thereof. The closed-loop control signal is generated on the basis of the error between the measure of the resistance of the SMA actuator and the target value of the resistance of the SMA actuator, adjusted by the resistance offset to compensate for variations in resistance.
摘要翻译： SMA致动装置包括：SMA致动器，被布置成驱动可移动元件的运动; 提供驱动电流的电流源; 检测所述SMA致动器的电阻的测量电路; 以及控制单元，用于产生提供给电流源的闭环控制信号，以控制驱动电流的功率以将SMA致动器的电阻驱动到目标值。 控制单元使用热模型来估计基于所提供的功率的SMA致动装置的特征温度; 和基于其的电阻偏移。 基于SMA致动器的电阻的测量与SMA致动器的电阻的目标值之间的误差产生闭环控制信号，由电阻偏移调整以补偿电阻的变化。
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公开(公告)号：US07974025B2
公开(公告)日：2011-07-05
申请号：US12596925
申请日：2008-04-22
申请人： Richard Topliss
发明人： Richard Topliss
IPC分类号： G02B7/02
CPC分类号： G03B3/10
摘要： A miniature camera lens actuation apparatus employs an SMA actuator comprising SMA wire to move a camera lens element. To provide autofocus, the SMA actuator is heated across its range of contraction and the resistance at which the focus is at an acceptable level is stored. To combat hysteresis, there is performed a flyback in which the SMA actuator is cooled, before heating the SMA actuator to the stored resistance. The stored resistance is adjusted to combat creep caused by non-linear heating of the SMA actuator. The SMA wire has conductive material extending along on a portion of the SMA wire which extends from a member connected to the SMA wire and being in electrical connection with the SMA wire in order to short out that portion of the SMA wire to reduce creep. Additional material is applied over the SMA wire and the member to reduce fatigue.
摘要翻译： 微型相机镜头致动装置使用包括SMA线的SMA致动器来移动相机镜头元件。 为了提供自动对焦，SMA致动器在其收缩范围内被加热，并且存储焦点处于可接受水平的电阻。 为了对抗滞后，在将SMA致动器加热到存储的电阻之前，执行了一个反激式，其中SMA致动器被冷却。 调整存储的电阻以抵抗由SMA致动器的非线性加热引起的蠕变。 SMA线具有沿着SMA线的一部分延伸的导电材料，SMA部分从连接到SMA线的部件延伸并且与SMA线电连接，以缩短SMA线的那部分以减少蠕变。 额外的材料应用于SMA线和构件上以减少疲劳。
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