This method USES digital image processing techniques to reconstruct the vector of the airplane. Then the pitching, yawing and roll angel are computed.

在终端机中利用图像处理技术重构出机身和机翼的空间向量，计算出无人机的俯仰角、偏航角和翻滚角。

youdao

Photoelectric rotary encoder, which is also called photoelectric angel position sensor, is a kind of digital angle measuring device combining optics, mechanics and electronics.

光电轴角编码器，又称光电角位置传感器，是一种集光、机、电为一体的数字测角装置。

youdao

Among our initial pitches and meetings, we met with Miles Spencer, a seasoned tech entrepreneur and angel investor with a special focus in digital media.

FORBES: Why--And How--I Became An Entrepreneur

CityPockets received seed funding from Launchbox Digital, a start-up accelerator, and are currently raising an angel round.

FORBES: Cutting The Groupon Clutter