那么，角的终边（除 端点外）在第几象限，我们就说这个角是第几象限角(quadrant angle). 特别注意:如果 角的终边在坐标轴上,就认为这个角不属于任何一个象限。
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quadrant angle of revolution 转动象限角 ; 滚动象限角
quadrant angle of fall [航] 落地俯角
quadrant angle of elevation [军] 仰角
quadrant angle of site 炮目高低角
back angle quadrant 靠背角量角器
foot angle quadrant 小腿夹角量角器
This paper introduces the dual axis small Angle measuring system, which USES quadrant si-photoelectric cell as the detector, analyzes the measuring principle, experimental equipment.
介绍了利用高灵敏度四象限硅光电管作为探测器的二维小角度测量系统，详细分析了其测试原理及实验装置。
The experiment came into use single light path critical angle method, output signals were detected by four-quadrant receiver, micro-displacement drive element were piezoelectric ceramics.
实验采用单光路临界角法，用四象限探测器探测输出信号，物面微位移采用压电陶瓷作为驱动元件。
According to spot in the four-quadrant detector photosensitive surface position to calculate the ship's yaw Angle relative to the laser source.
根据光斑在四象限探测器光敏面上的位置来计算船舶相对于激光光源的偏转角度。
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