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发明授权
US07501834B2 Voice coil actuator with embedded capacitive sensor for motion, position and/or acceleration detection 有权
具有嵌入式电容传感器的音圈执行器，用于运动，位置和/或加速度检测

Voice coil actuator with embedded capacitive sensor for motion, position and/or acceleration detection
摘要：
A voice coil actuator having a capacitive sensor. A magnetic housing contains at least one magnet, and has a wall that defines a first cavity. A magnetic core is coupled to the magnetic housing and extend from an interior surface of the magnetic housing in a direction of a center axis of the wall of the magnetic housing. A coil assembly has a wall defining a second cavity that at least partly envelops the magnetic core, disposed at least partly inside the first cavity, and adapted to move linearly with respect to the magnetic housing. The coil assembly forms a capacitive sensor with the magnetic core, the capacitive sensor adapted to measure at least one of position, velocity and acceleration of the coil assembly with respect to the magnetic housing.
摘要（中）：

具有电容式传感器的音圈致动器。 磁性壳体包含至少一个磁体，并且具有限定第一腔的壁。 磁芯被耦合到磁性壳体并且从磁性壳体的内表面沿着磁性壳体的壁的中心轴线的方向延伸。 线圈组件具有限定第二腔的壁，所述第二腔至少部分地包围磁芯，至少部分地设置在第一腔内，并且适于相对于磁性壳体线性地移动。 线圈组件形成具有磁芯的电容传感器，电容式传感器适于测量线圈组件相对于磁性壳体的位置，速度和加速度中的至少一个。

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