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    • 6. 发明授权
    • Calibration of a system for tracking a writing instrument with multiple sensors
    • 用于跟踪具有多个传感器的书写工具的系统的校准
    • US06492981B1
    • 2002-12-10
    • US09721045
    • 2000-11-21
    • David G. StorkMichael AngeloGregory J. Wolff
    • David G. StorkMichael AngeloGregory J. Wolff
    • G09G500
    • G06K9/224G06F3/03545G06F3/0383
    • One embodiment of the writing instrument described herein comprises a pen-like device containing three accelerometers and three gyroscopes. Data from these sensors are processed via an Euler transform. Prior to using the writing instrument, the user holds the writing instrument in multiple predefined positions and sensor readings are taken. The sensor readings are mapped to the corresponding predefined positions. In addition, the sensor readings are compared to expected sensor readings to compensate for environmental variations such as altitude or temperature as well as for the possible tilt of a writing surface. The sensor readings are interpolated to map sensor readings other than those at the predefined positions to other writing instrument positions. When the user writes with the writing instrument, sensor outputs are used to track the writing instrument to define strokes made by the user. The data describing the strokes may be stored or processed to accomplish a variety of tasks including faxing a message, recording information, etc.
    • 本文描述的书写工具的一个实施例包括一个包含三个加速度计和三个陀螺仪的笔状装置。 来自这些传感器的数据通过欧拉变换进行处理。 在使用书写工具之前,用户将书写工具保持在多个预定义的位置,并采集传感器读数。 传感器读数映射到相应的预定位置。 此外,将传感器读数与预期传感器读数进行比较,以补偿环境变化,如高度或温度以及书写表面的可能倾斜。 传感器读数被内插以将传感器读数除以预定位置的读数读数与其他书写工具位置。 当用户使用书写工具写入时,传感器输出用于跟踪书写工具以定义用户做出的笔画。 描述笔画的数据可以被存储或处理以完成各种任务,包括传真消息,记录信息等。