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1. 发明申请

US20060279549A1 Writing system 失效
公开(公告)号：US20060279549A1
公开(公告)日：2006-12-14
申请号：US11149055
申请日：2005-06-08
申请人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Wong , Wen Li , Philip Heng Leong , Ming Wong
发明人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Wong , Wen Li , Philip Heng Leong , Ming Wong
IPC分类号： G09G5/00
CPC分类号： G06F3/03545
摘要： A Micro Inertial Measurement Unit (IMU) which is based on MEMS accelerometers and gyro sensors is developed for real-time recognition of human hand motions, especially as used in the context of writing on a surface. Motion is recorded by a rate gyro and an accellerometer and communicated to a Bluetooth module, possibly to a computer which may be 20 to 30 feet or more from the sensor. The motion information generated and communicated is combined with appropriate filtering and transformation algorithms to facilitate a complete Digital Writing System that can be used to record handwriting on any surface, or on no surface at all. The overall size of an IMU can be less than 26 mm×20 mm×20 mm, and may include micro sensors, a processor, and wireless interface components. The Kalman filtering algorithm is preferably used to filter the noise of sensors to allow successful transformance of hand motions into recognizable and recordable English characters. The immediate advantage is the facilitation of a digital interface with both PC and mobile computing devices and perhaps to enable wireless sensing.

2. 发明授权

US07508384B2 Writing system 失效
标题翻译：写作系统
公开(公告)号：US07508384B2
公开(公告)日：2009-03-24
申请号：US11149055
申请日：2005-06-08
申请人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Yan Wong , Wen Jung Li , Philip Heng Wai Leong , Ming Yiu Wong
发明人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Yan Wong , Wen Jung Li , Philip Heng Wai Leong , Ming Yiu Wong
IPC分类号： G09G5/00
CPC分类号： G06F3/03545
摘要： A Micro Inertial Measurement Unit (IMU) which is based on MEMS accelerometers and gyro sensors is developed for real-time recognition of human hand motions, especially as used in the context of writing on a surface. Motion is recorded by a rate gyro and an accellerometer and communicated to a Bluetooth module, possibly to a computer which may be 20 to 30 feet or more from the sensor. The motion information generated and communicated is combined with appropriate filtering and transformation algorithms to facilitate a complete Digital Writing System that can be used to record handwriting on any surface, or on no surface at all. The overall size of an IMU can be less than 26 mm×20 mm×20 mm, and may include micro sensors, a processor, and wireless interface components. The Kalman filtering algorithm is preferably used to filter the noise of sensors to allow successful transformance of hand motions into recognizable and recordable English characters. The immediate advantage is the facilitation of a digital interface with both PC and mobile computing devices and perhaps to enable wireless sensing.
摘要翻译：开发了基于MEMS加速度计和陀螺仪传感器的微惯性测量单元（IMU），用于实时识别人体手动运动，特别是在表面上写作的背景下使用。运动由速率陀螺仪和测速计记录，并传送到蓝牙模块，可能传送到可能距离传感器20到30英尺或更多的计算机。生成和传达的运动信息与适当的滤波和变换算法相结合，便于完整的数字写入系统，可用于在任何表面上或完全无表面记录手写。 IMU的总体尺寸可以小于26mm×20mm×20mm，并且可以包括微传感器，处理器和无线接口部件。卡尔曼滤波算法优选地用于过滤传感器的噪声，以便成功地将手运动变换成可识别和可记录的英文字符。最直接的优点是便利与PC和移动计算设备的数字接口，并可能实现无线传感。

3. 发明申请

US20090183929A1 Writing system with camera 审中-公开
标题翻译：用相机写系统
公开(公告)号：US20090183929A1
公开(公告)日：2009-07-23
申请号：US12378459
申请日：2009-02-12
申请人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Yan Wong , Wen Jung Li , Philip Heng Wai Leong , Ming Yiu Wong
发明人： Guanglie Zhang , Guangyi Shi , Yilun Luo , Heidi Yee Yan Wong , Wen Jung Li , Philip Heng Wai Leong , Ming Yiu Wong
IPC分类号： G06K11/06
CPC分类号： G06F17/242 , G06F3/03545
摘要： A Micro Inertial Measurement Unit (IMU) which is based on MEMS accelerometers and gyro sensors is developed for real-time recognition of human hand motions, especially as used in the context of writing on a surface. Motion is recorded by a motion/acceleration sensor, which may be a combination of a rate rate gyro and an accelerometer, and possibly in combination with a video camera set to detect markers located on a board, with the camera utilizable to detect lines and markers and to determine the proximity of the white board. The immediate advantage is the facilitation of a digital interface with both PC and mobile computing devices and perhaps to enable wireless sensing.
摘要翻译：开发了基于MEMS加速度计和陀螺仪传感器的微惯性测量单元（IMU），用于实时识别人体手动运动，特别是在表面上写作的背景下使用。运动由运动/加速度传感器记录，运动/加速度传感器可以是速率陀螺仪和加速度计的组合，并且可能与用于检测位于板上的标记的摄像机组合，相机可用于检测线和标记并确定白板的接近度。最直接的优点是便利与PC和移动计算设备的数字接口，并可能实现无线传感。

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