A special sensor designed with Hall Elements is used in the position-orientation measurement and control system.
利用霍尔元件设计了霍尔传感器，用于球关节位姿测控系统设计。
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That's because the glasses are wired to position and orientation sensors that track the wearer's gaze, and the system USES this information to alter the image accordingly in real time for each user.
The vest detects the orientation and position of the helium atoms and sends the data to a computer, which turns it into an image of airflow through the lung.